ENDOCRINE Flashcards

(848 cards)

1
Q

What are the messengers in the endocrine system?

A

Hormones

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How can hormones exert their effect at receptors?

A

The rate of enzymatic reactions
The transport of ions and molecules across cell
membranes
Gene expression and the synthesis of proteins
Electrical signalling pathways

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What does the thyroid gland secrete?

A

Thyroxine
Calcitonin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What does thyroxine do?

A

Regulates metabolism

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What does calcitonin do?

A

Inhibits release of calcium from the bones

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What do parathyroid glands secrete?

A

Parathyroid hormone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What does parathyroid hormone do?

A

Stimulates the release of calcium from bones

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What do islet cells in the pancreas secrete?

A

Insulin
Glucagon

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What do the testes secrete?

A

Testosterone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What do the ovaries secrete?

A

Oestrogen
Progesterone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What does the adrenal medulla secrete?

A

Adrenaline

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What does the adrenal cortex secrete?

A

Corticosteroids
Aldosterone
Testosterone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What does the pineal gland secrete?

A

Melatonin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Types of hormones?

A

Peptides
Steroids
Amino acid derivatives

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Examples of peptide hormones?

A

Insulin
Glucagon
Prolactin
ACTH

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Examples of steroid hormones?

A

Cortisol
Aldosterone
Oestrogen
Progesterone
Testosterone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Examples of amino acid derivative hormones?

A

Adrenaline
Thyroxine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

How are peptide hormones synthesized?

A

As prohormones requiring further processing to activate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

How are steroid hormones synthesized?

A

From cholesterol

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

How are amino acid derivative hormones synthesized?

A

From tyrosine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

How are peptide hormones stored?

A

In vesicles, secretion regulated

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

How are steroid hormones stored?

A

They are not, they are released immediately

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

How are amino acid derivative hormones stored?

A

Stored in various ways

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q
A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
What is reproductive endocrinology?
The study of hormones involved in reproduction and reproductive development
26
What are the main sex hormones?
* Androgens * Oestrogens * Progestogens
27
What is the role of androgens?
Male sex hormones/Masculinising agents
28
What is the function of testosterone?
Critical for generation of sperm and development and maintenance of masculine characteristics
29
What does oestradiol control?
Development and maintenance of feminine characteristics and stimulates growth of the egg follicle
30
What is the function of progesterone?
Stimulates growth of the endometrial lining of the uterus to prepare it for pregnancy
31
How is the synthesis and release of sex hormones regulated?
By the hypothalamic-pituitary axis
32
What does GnRH stand for?
Gonadotropin-Releasing Hormone
33
What are the functions of FSH and LH?
* Promote sex hormone production * Promote gametogenesis
34
What is the primary function of the testes?
* Produces testosterone * Produces spermatozoa
35
What is the primary function of the ovaries?
* Produces oestradiol * Produces progesterone * Produces ova
36
What is spermatogenesis?
The process of sperm cell development
37
What triggers the onset of puberty in males?
High pulses of GnRH
38
What does testosterone stimulate in males?
* Development of secondary sex characteristics * Spermatogenesis
39
What is the role of Sertoli cells?
* Provide nutrients to developing germ cells * Regulate FSH production * Secrete seminal fluid
40
How long does the entire process of spermatogenesis take?
60-64 days
41
What is the average sperm production per day in males?
Approximately 30 million sperm
42
What are the three phases of the menstrual cycle?
* Follicular Phase * Ovulation Phase * Luteal Phase
43
What happens during the follicular phase of the menstrual cycle?
A follicle develops into a mature follicle
44
What is the average onset of puberty in females?
Age 11
45
What hormones promote ovulation and sex hormone production in females?
* Follicle Stimulating Hormone (FSH) * Luteinising Hormone (LH)
46
The menstrual cycle lasts how many days?
21-35 days
47
What occurs if fertilisation does not take place during the menstrual cycle?
The endometrial lining is shed (menstruation)
48
What regulates the menstrual cycle tightly?
Hormones
49
What are the critical roles of Leydig cells?
Respond to LH and promote testosterone synthesis
50
What is inhibin's role in male reproductive endocrinology?
Regulates FSH production in a negative feedback loop
51
Fill in the blank: The testes are the site of _______.
[testosterone production and spermatogenesis]
52
True or False: Oestradiol is produced in the testes.
False
53
What are the three phases of the menstrual cycle?
1. Follicular Phase 2. Ovulatory Phase 3. Luteal Phase
54
What is the duration of the Follicular Phase?
Lasts from 9 to 23 days
55
What occurs during the Ovulatory Phase?
The release of the oocyte
56
How long does the Ovulatory Phase last?
1 to 3 days
57
What marks the beginning of the Luteal Phase?
Development of the corpus luteum
58
What is the duration of the Luteal Phase?
13 to 14 days
59
What hormone surge stimulates ovulation?
LH (Luteinizing Hormone)
60
What stimulates follicular growth in the Follicular Phase?
Increase in FSH (Follicle Stimulating Hormone)
61
What do theca cells respond to and what do they synthesize?
Respond to LH and synthesize testosterone
62
What do granulosa cells respond to and what do they synthesize?
Respond to FSH and synthesize oestradiol from testosterone
63
What is the role of inhibin released by the follicle?
Inhibits the production of FSH
64
What is the corpus luteum and what does it produce?
A yellow mass of cells that secretes progesterone, oestradiol, and inhibin
65
What is the function of progesterone during the menstrual cycle?
Stimulates the growth of the endometrial lining of the uterus
66
What happens if fertilization occurs?
HCG ensures survival of the corpus luteum
67
What does the combined oral contraceptive pill (COCP) contain?
An estrogen and progestogen
68
How does the COCP prevent ovulation?
By suppressing the release of gonadotropins (FSH and LH)
69
What is the significance of human chorionic gonadotropin (HCG)?
Ensures survival of the corpus luteum
70
What is a zygote?
The cell formed by the union of two gametes
71
What term describes the early developmental stage after fertilization?
Conceptus
72
What does totipotent mean?
The cell has the capacity to develop into a complete organism
73
What are trophoblasts and their role?
Form the outer layer of a blastocyst and provide nutrients to the developing embryo
74
What does the presence of HCG in urine or blood indicate?
Pregnancy
75
What happens to the corpus luteum after three months of pregnancy?
Degenerates due to a fall in HCG
76
What is the role of oxytocin during labor?
Important in contractions
77
What is menopause?
The ending of menstruation
78
Fill in the blank: The mucous membrane that lines the uterus is called the _______.
endometrium
79
True or False: The corpus luteum is responsible for producing oestradiol during the luteal phase.
True
80
What is hCG and its role during pregnancy?
hCG is produced by trophoblasts and ensures the survival of the corpus luteum. ## Footnote hCG stands for human chorionic gonadotropin, a hormone crucial for maintaining pregnancy.
81
What hormones are involved in the preparation of the uterus for delivery?
Progesterone and oestrogen prepare the uterus for delivery. ## Footnote These hormones are essential for maintaining pregnancy and preparing the body for childbirth.
82
What is the function of human placental lactogen?
Human placental lactogen is involved in metabolism, breast development, and lactation. ## Footnote This hormone is produced by the placenta and plays a significant role in preparing the mother's body for breastfeeding.
83
What is the role of oxytocin during childbirth?
Oxytocin is important for contractions of the uterus. ## Footnote It is released from the posterior pituitary gland and plays a crucial role in labor.
84
What is the difference between an embryo and a fetus in terms of development?
An embryo is present for the first 2 months, while it is referred to as a fetus from 2 months onward.
85
How long does a typical pregnancy last?
Approx. 40 weeks.
86
What triggers the release of oxytocin during childbirth?
Baby pushing against the cervix activates stretch receptors, sending a message to the hypothalamus to release oxytocin. ## Footnote This process is part of the body's natural response to labor.
87
What effect does oxytocin have on the uterus during labor?
Oxytocin causes contractions of the smooth muscles of the uterus, pushing the baby further down the birth canal.
88
What is the mechanism of positive feedback in childbirth?
The release of oxytocin causes further contractions, which activate more stretch receptors, leading to more oxytocin release.
89
What happens to the release of oxytocin upon birth?
The stretching of the cervix halts, stopping the release of oxytocin.
90
List some medical uses of oxytocin.
* To induce labor * To accelerate labor * To stop bleeding after delivery (routinely administered after caesarean delivery)
91
What is endocrinology?
The study of hormones.
92
What are hormones?
Chemical messengers secreted into the blood that exert their effect on a distal target.
93
What is the typical concentration range for hormones in the body?
Nanomolar (10^-9 M) to picomolar (10^-12 M).
94
List some functions regulated by hormones.
* Growth * Development * Metabolism * Temperature * H2O balance * Reproduction
95
Where is the hypothalamus located?
Below the thalamus.
96
What is the sella turcica?
A bone socket at the base of the skull that houses the pituitary gland.
97
What is the role of the hypothalamic pituitary axis?
It serves as a major link between the endocrine and nervous system.
98
What is the anterior pituitary often referred to as?
The master gland.
99
How many different tropic hormones does the hypothalamus secrete?
7 different tropic hormones.
100
What is a tropic hormone?
Hormones that act on other endocrine glands to stimulate synthesis/release of a hormone.
101
Name one hormone synthesized and secreted from the anterior pituitary.
TSH (Thyroid Stimulating Hormone).
102
What does ACTH stand for?
Adrenocorticotropic Hormone.
103
What does LH do?
Acts on gonads and stimulates production and secretion of sex hormones/ovulation.
104
What is the function of FSH?
Stimulates the development of egg and sperm and secretion of sex hormones.
105
What is the role of Prolactin?
Stimulates milk secretion.
106
What does Growth Hormone (GH) stimulate?
Growth and energy metabolism.
107
What are the two hormones synthesized in the posterior pituitary?
* Oxytocin * Antidiuretic Hormone (ADH)
108
What is the function of oxytocin?
Controls uterine contractions during labor and promotes milk flow in nursing mothers.
109
What is the role of Antidiuretic Hormone (ADH)?
Increases water reabsorption and regulates water balance in the body.
110
What is an endocrine disorder?
Results from the improper function of the endocrine system.
111
Name a common endocrine disorder.
Type 1 Diabetes Mellitus.
112
What causes an endocrine disorder?
Hormone imbalance, genetic disorder, infection or disease, injury to endocrine gland, endocrine tumor.
113
What is primary hypofunction?
The cause of the disorder is in the peripheral (target) endocrine gland.
114
What is secondary hyperfunction?
The cause of the hormonal secretion disorder of the peripheral gland is in the anterior pituitary.
115
What does tertiary hypofunction refer to?
The cause of secretion disorder of peripheral gland is in the hypothalamus.
116
What is cortisol?
A steroid hormone released from the adrenal gland
117
How does cortisol increase blood glucose?
By promoting gluconeogenesis, causing breakdown of skeletal muscle protein, and enhancing lipolysis ## Footnote These processes provide substrates for glucose production and fatty acids for other tissues.
118
What is the permissive effect of cortisol?
It requires the presence of glucagon for its action
119
What is the synergistic effect of cortisol?
It works synergistically with glucagon and catecholamines
120
What effect does cortisol have on the immune system?
It suppresses the immune system by preventing cytokine release and antibody production
121
What is hydrocortisol used for?
As an immunosuppressive drug
122
What impact does cortisol have on plasma calcium levels?
Decreases plasma calcium by causing bone breakdown and increasing intestinal calcium absorption while increasing renal calcium excretion
123
How does cortisol influence brain function?
It affects memory and mood
124
What is hypercortisolism?
A condition characterized by excessive cortisol, often referred to as Cushing's syndrome
125
What are the common causes of hypercortisolism?
Tumor of the adrenal gland, pituitary tumor secreting excess ACTH, corticosteroid treatment for autoimmune disorders, ectopic ACTH production
126
List some symptoms of hypercortisolism.
* Increased appetite and food intake * Weight gain * Increased fat deposits in face and trunk * Immunosuppression * Osteoporosis * Hyperglycaemia * Depression and difficulties with learning and memory
127
What is hypocortisolism?
A condition characterized by low cortisol levels, often associated with Addison's disease
128
What causes hypocortisolism?
Autoimmune destruction of the adrenal cortex, rare genetic causes, exogenous cortisol leading to adrenal atrophy
129
List some symptoms of hypocortisolism.
* Muscle weakness and fatigue * Weight loss and decreased appetite * Darkening of the skin (hyperpigmentation) * Low blood pressure * Salt craving * Low blood sugar (hypoglycaemia) * Nausea, diarrhea, or vomiting * Muscle or joint pains * Irritability/Depression * Body hair loss or sexual dysfunction in women
130
What is diabetes mellitus?
A condition with chronically raised blood glucose concentration due to a lack of insulin and/or a deficiency in insulin action.
131
What fasting glucose level is classified as diabetes according to WHO?
Over 7mM.
132
What is the peak age of onset for Type 1 diabetes mellitus?
12 years.
133
What percentage of all diabetics does Type 1 diabetes account for?
Approx. 8%.
134
What is the peak age of onset for Type 2 diabetes mellitus?
60 years.
135
What percentage of all diabetics does Type 2 diabetes account for?
Approx. 90%.
136
What is a common characteristic of over 85% of Type 2 diabetics?
They are obese.
137
What is gestational diabetes?
Diabetes occurring in 4-5% of pregnancies.
138
What percentage of diabetics in the UK have Type 1 diabetes?
Approx. 8%.
139
What causes Type 1 diabetes?
T cell mediated autoimmune destruction of pancreatic beta-cells.
140
What are the clinical features of Type 1 diabetes?
* Hyperglycaemia * Glycosuria * Polyuria * Polydipsia * Weight loss * Pear drop breath.
141
What is glycosuria?
High levels of glucose in the urine.
142
What causes polyuria in diabetes?
Exceeding renal threshold creates osmotic drag and increased diuresis.
143
What is the significance of C-peptide in Type 1 diabetes?
No C-peptide detectable.
144
What is diabetic ketoacidosis (DKA)?
A life-threatening condition due to starvation activating ketogenesis.
145
What is the normal HbA1c level?
Below 42 mmol/mol (6.0%).
146
What is the HbA1c level range for prediabetes?
42 to 47 mmol/mol (6.0 to 6.4%).
147
What is the HbA1c level for diabetes?
48 mmol/mol (6.5% or over).
148
Who discovered insulin and when?
Frederick Banting and Charles H. Best in 1921.
149
What is the treatment for Type 1 diabetes?
* Insulin injections * Insulin pumps * Pancreas transplantation * Islet transplantation.
150
What causes hypoglycaemia?
Too much insulin and/or not enough food, vigorous exercise, or excessive alcohol.
151
What are common symptoms of hypoglycaemia?
* Shakiness * Anxiety * Tiredness * Weakness * Sweating * Hunger * Dizziness.
152
What is the primary cause of diabetic ketoacidosis?
Cellular glucose starvation activating ketogenesis.
153
What are the long-term complications of hyperglycaemia?
* Eye damage (retinopathy) * Kidney damage (nephropathy) * Nerve damage (neuropathy) * Heart disease * Stroke.
154
What percentage of Type 1 diabetes cases are caused by autoimmune response?
90%.
155
What triggers the adaptive immune response in Type 1 diabetes?
Exposure to self antigens.
156
What are the two arms of the adaptive immune response?
* Cell-mediated immune response * Humoral/antibody-mediated immune response.
157
What are the two arms of the adaptive immune response?
Cell-mediated immune response and Humoral/antibody mediated immune response ## Footnote Cell-mediated involves T cells, while humoral involves B cells.
158
What is the role of Helper T-Cells (CD4 cells)?
Secrete cytokines when activated and recruit other immune cells ## Footnote They stimulate B cells to proliferate.
159
What do Cytotoxic T-cells (CD8 cells) secrete when activated?
Enzymes perforin and granzyme ## Footnote These enzymes kill 'infected' cells.
160
What is the function of the T-cell receptor (TCR)?
T cells express an antigen-binding receptor on their membrane.
161
What does Major Histocompatibility Complex (MHC) do?
Presents antigens to T cells and activates them.
162
Which cells express MHC I?
All nucleated cells ## Footnote They present antigenic peptides to Cytotoxic T cells.
163
What type of cells express MHC II?
Antigen Presenting Cells (APCs) including dendritic cells, macrophages, Langerhans cells, and B cells.
164
What do MHC CLASS 1 molecules present?
Endogenous antigens originated from the cytoplasm.
165
What do MHC CLASS 2 molecules present?
Exogenous antigens originated extracellularly from foreign bodies such as pathogens.
166
What is evidence for a cell-mediated immune response in Type 1 diabetes?
Healthy islet insulitis with many T-cells in the infiltrate, predominance of cytotoxic T-cells (CD8+VE).
167
What percentage of type-1 diabetics have antibodies directed against islet cell proteins?
85-90%.
168
Name some antibodies detected in type-1 diabetics.
* Proinsulin (IAA) * Glutamic acid decarboxylase (GAD) * IA-2 (IA-2A) * Zinc transporter (ZnT8A)
169
What is the genetic concordance in identical twins for Type 1 Diabetes?
50% concordance.
170
What are diabetes susceptibility genes?
Single nucleotide polymorphisms that increase the probability of developing type 1 diabetes.
171
What major genetic determinants are associated with Type 1 Diabetes?
Polymorphisms of class II HLA genes encoding DQ and DR.
172
What percentage of Caucasian type 1 diabetic subjects carry HLA-DR3/DR4 haplotype?
95%.
173
What environmental triggers are associated with Type 1 diabetes?
* Viruses: Coxsackie-B virus, Rubella, Mumps * Toxins: streptozotocin and alloxin * Diet: cow's milk, smoked fish (nitrosamines) * Vitamins: low vitamin D
174
What happens during the autoimmune destruction of beta-cells?
Beta cell injury results in release of antigens and cytokines.
175
What do B cells generate in response to beta-cell injury?
Autoantibodies.
176
What role do activated autoreactive CD4+ T cells play in Type 1 Diabetes?
They recruit CD8+ cytotoxic T cells and other inflammatory cells, resulting in destructive insulitis.
177
What leads to the further recruitment and activation of T lymphocytes?
Production of pro-inflammatory cytokines by APCs and T-cells.
178
What is a sign of beta cell injury?
Apoptosis/necrosis.
179
What is the normal plasma glucose concentration range when fasting?
4.0 to 5.4 mmol/L (72 to 99 mg/dL)
180
What is the plasma glucose concentration two hours after eating?
7.8 mmol/L (140 mg/dL)
181
What is the total glucose content in a 380ml bottle of Lucozade that contains 17.9g of glucose per 100ml?
68.02g of glucose
182
What is the average blood volume in an adult male?
Approximately 5 litres
183
What is the glucose concentration in blood if all glucose from Lucozade was absorbed?
75.5 mmol/L or 1350 mg/dL
184
What hormone is secreted from pancreatic beta-cells?
Insulin
185
What is the primary function of insulin?
Lowers blood glucose
186
What percentage of the pancreas is composed of exocrine tissue?
98%
187
What is the role of the exocrine pancreas?
Secretes digestive enzymes and bicarbonate ions into the pancreatic duct
188
What are the Islets of Langerhans?
Clusters of endocrine cells in the pancreas that secrete hormones into the blood
189
What percentage of islet cells are beta cells, and what do they secrete?
70% secrete insulin
190
What is the function of glucokinase in beta cells?
Phosphorylates glucose
191
What triggers the exocytosis of insulin from beta cells?
Rise in intracellular calcium
192
What is the characteristic pattern of glucose-stimulated insulin secretion?
Biphasic: rapid first phase followed by prolonged second phase
193
What is the primary receptor type for insulin action?
Receptor Tyrosine Kinase
194
What processes does insulin promote in the liver?
* Glycogenesis * Lipogenesis * Glycolysis
195
What hormone increases blood glucose levels and is secreted from pancreatic alpha cells?
Glucagon
196
What is the effect of cortisol on glucose metabolism?
Promotes gluconeogenesis and enhances lipolysis
197
True or False: Glucagon acts on muscle cells.
False
198
What is the diurnal cycle of cortisol secretion linked to?
Stress and low blood-glucose concentration
199
Fill in the blank: The pancreas lies below the ______ and behind the ______.
[liver], [stomach]
200
What is the role of insulin in glucose homeostasis?
Maintains glucose levels by promoting uptake and storage
201
What is the effect of hyperglycemia on the body?
Can lead to coma and death
202
What does the oral glucose tolerance test (OGTT) measure?
Changes in blood glucose after glucose ingestion
203
What is the importance of insulin's biphasic release pattern?
Allows for rapid response to changes in blood glucose
204
What are the components of the pancreatic juice secreted by exocrine cells?
* Digestive enzymes * Bicarbonate ions
205
What is the role of sodium-glucose cotransporter (SGLT1)?
Facilitates glucose absorption in the small intestine
206
What condition can corticosteroids lead to in relation to blood glucose?
Steroid-induced diabetes
207
What effect does cortisol have on glucose production when combined with glucagon or epinephrine?
Cortisol markedly accentuates hyperglycaemia produced by glucagon and/or epinephrine ## Footnote This effect is significant in the context of glucose metabolism regulation.
208
What is the mechanism of action (MOA) of cortisol in glucose production?
* Promotes gluconeogenesis in liver * Causes breakdown of skeletal muscle protein for gluconeogenesis * Enhances lipolysis to provide fatty acids for other tissues * Counteracts effects of insulin ## Footnote These actions help maintain blood glucose levels.
209
What can synthetic cortisol medication lead to in diabetic patients?
Insulin resistance ## Footnote This may require diabetic patients to take more medication.
210
What hormones increase during exercise to promote glucose availability?
* Glucagon * Noradrenaline * Adrenaline ## Footnote These hormones increase glycogenolysis and gluconeogenesis.
211
What role does cortisol play during sustained aerobic exercise?
Promotes gluconeogenesis when carbohydrate resources are depleting ## Footnote This is crucial for maintaining energy levels during prolonged exercise.
212
What hormones increase lipase enzyme activity during sustained exercise?
* Cortisol * Growth hormone * Noradrenaline * Adrenaline ## Footnote Increased lipase activity enhances the oxidation of fatty acids (lipolysis).
213
Fill in the blank: Cortisol promotes ______ during aerobic exercise when carbohydrate resources are depleting.
gluconeogenesis
214
True or False: Insulin has a positive effect on glucose production from the liver.
False ## Footnote Insulin generally decreases glucose production.
215
What is the effect of glucagon on glucose production?
Increases glucose production from the liver ## Footnote Glucagon plays a critical role in raising blood glucose levels.
216
What are the states that affect glucose homeostasis?
* Fed * Fasted * Stress * Exercise ## Footnote These states influence hormonal responses and glucose metabolism.
217
Who were the first to isolate insulin for clinical use?
Banting and Best in 1921.
218
What process did Walden discover to maintain insulin potency?
Isoelectric precipitation.
219
What type of insulin was first marketed by Lilly in October 1923?
Iletin®.
220
When was the first human insulin marketed?
1982.
221
What is recombinant insulin?
Human insulin obtained through recombinant DNA technology.
222
What are the main groups of insulin based on their molecular association?
* Hexamer * Dimer * Monomer
223
What is the lag phase associated with soluble human insulin?
The time between injection of hexamers and availability of biologically active dimers and monomers.
224
What is NPH insulin and when was it introduced?
Intermediate-acting insulin introduced in 1946.
225
What is the primary characteristic of NPH insulin?
Crystalline suspension with prolonged action.
226
What are the characteristics of Semilente, Ultralente, and Lente insulins?
* Semilente: Amorphous, duration of action 12-14 hours * Ultralente: Crystalline, duration of action >30 hours * Lente: Mixture of Ultralente and Semilente, duration of action ~24 hours
227
What modification does insulin glargine have?
Replaces one amino acid with two at the end of the B chain.
228
What is the significance of the pH change in insulin glargine upon injection?
It microprecipitates due to reduced solubility at physiological pH.
229
How does insulin detemir differ from other insulins?
One amino acid is omitted and replaced with a fatty acid.
230
What is the mechanism of action for rapid-acting insulins like Lispro?
Modifications prevent dimer and hexamer formation, allowing only monomers.
231
What is the FDA's recent guidance regarding insulin biosimilars?
To help sponsors bring insulin biosimilars and interchangeable products to market more quickly.
232
What are the risks associated with insulin pumps?
* Skin infection * Ketoacidosis if flow is interrupted * Pump site must be moved every 2-3 days
233
What is the function of Medtronic’s MiniMed 670G system?
Automatically monitors glucose and provides appropriate basal insulin doses.
234
What is inhaled insulin and its market history?
A dry powder formulation of recombinant human insulin; Exubera marketed briefly but removed due to poor sales.
235
What technology does Buccal insulin (Oralin®) use for delivery?
RapidMist™ technology.
236
What is CholestosomeTM technology in oral insulin delivery?
A lipid-based particle used to encapsulate insulin for oral administration.
237
What recent development has shown promise for oral insulin delivery?
Oramed Pharmaceuticals' insulin capsule trials have shown significant glucose level reduction.
238
What is the purpose of a glucose-responsive nanogel?
Acts as an artificial liver to maintain glucose concentrations safely.
239
What was discovered about taking oral insulin once a day at night?
It had a statistically meaningful effect on lowering blood glucose over a full 24 hours.
240
What is the purpose of the glucose-responsive nanogel?
It acts as an artificial liver for hyperglycemia treatment.
241
How long do the nanogels keep glucose concentrations within a safe range?
At least 6 hours.
242
What is a key feature of the glucose-responsive nanogel?
It cannot reduce blood sugar to an unsafe level.
243
What type of insulin delivery system provides both rapid and slow release?
Glucose-responsive nanoparticles.
244
How long does a single subcutaneous injection of glucose-responsive nanoparticles provide glycemic control in diabetic mice?
16 hours.
245
What is the title of the review article on oral delivery of insulin?
Oral delivery of insulin for treatment of diabetes: status quo, challenges and opportunities.
246
What is one method of insulin delivery mentioned that uses microneedles?
Transdermal delivery.
247
What type of nanoparticles are used for oral delivery of insulin?
Lipid nanoparticles.
248
What emerging technology is discussed in the context of insulin delivery?
Micro- and nano-technology delivery.
249
What is Type 1 diabetes?
A chronic condition where the pancreas produces little or no insulin.
250
At what age is Type 1 diabetes most commonly diagnosed?
It is most commonly diagnosed in children and young adults.
251
True or False: Type 1 diabetes can be prevented.
False.
252
What is the primary method for diagnosing Type 1 diabetes?
Blood tests measuring blood glucose levels.
253
What is the normal range for fasting blood glucose levels?
Less than 5.6 mmol/L.
254
Fill in the blank: A fasting blood glucose level of ___ mmol/L or higher indicates diabetes.
7.0
255
What are common symptoms of Type 1 diabetes?
Increased thirst, frequent urination, extreme fatigue, and blurred vision.
256
Which blood test is used to measure average blood glucose over the past 2-3 months?
HbA1c test.
257
What HbA1c level indicates diabetes?
An HbA1c of 6.5% or higher.
258
True or False: Type 1 diabetes is an autoimmune disease.
True.
259
What is the role of insulin in the body?
Insulin helps regulate blood glucose levels by facilitating the uptake of glucose into cells.
260
What is the typical treatment for Type 1 diabetes?
Insulin therapy.
261
Fill in the blank: Type 1 diabetes is also known as ___ diabetes.
insulin-dependent
262
What is the significance of ketones in Type 1 diabetes?
Ketones are produced when the body starts breaking down fat for energy due to lack of insulin.
263
What is diabetic ketoacidosis?
A serious complication that occurs when ketone levels become dangerously high.
264
How often should individuals with Type 1 diabetes monitor their blood glucose levels?
Typically several times a day.
265
What is the purpose of a Continuous Glucose Monitor (CGM)?
To provide real-time blood glucose readings throughout the day.
266
True or False: Type 1 diabetes can develop suddenly.
True.
267
What is the typical onset age range for Type 1 diabetes?
Usually between ages 5 and 20.
268
Which hormone is absent in individuals with Type 1 diabetes?
Insulin.
269
What lifestyle changes are recommended for managing Type 1 diabetes?
Healthy eating, regular physical activity, and blood glucose monitoring.
270
Fill in the blank: The UK screening program for Type 1 diabetes focuses on ___ symptoms.
classic
271
What is the role of the healthcare team in managing Type 1 diabetes?
To provide education, support, and medical care for effective diabetes management.
272
What is the long-term risk of poorly managed Type 1 diabetes?
Increased risk of complications such as heart disease, kidney failure, and neuropathy.
273
True or False: People with Type 1 diabetes can lead a normal life.
True.
274
What type of insulin regimen is commonly used in Type 1 diabetes management?
A combination of basal and bolus insulin.
275
What is the function of the ovaries?
Production of oocytes and hormones such as estrogen and progesterone ## Footnote Ovaries play a crucial role in the female reproductive system.
276
What are granulosa and theca cells?
Granulosa cells nourish developing oocytes and produce estrogen; theca cells synthesize testosterone. ## Footnote Both cell types are essential for follicular development.
277
What are the stages of the menstrual cycle?
Follicular phase, ovulatory phase, luteal phase ## Footnote Each phase is characterized by specific hormonal changes and physiological events.
278
How are female sex hormones regulated?
Hormones such as GnRH, FSH, and LH regulate the production and release of estrogen and progesterone. ## Footnote This regulation is critical for the menstrual cycle and reproductive health.
279
What hormonal changes occur during pregnancy?
Increased levels of progesterone and human chorionic gonadotropin (HCG). ## Footnote These hormones support pregnancy and maintain the uterine lining.
280
What are the primary causes of female infertility?
Hormonal imbalances, structural issues, age, and health conditions. ## Footnote Factors affecting fertility can vary widely among individuals.
281
What is gametogenesis?
The process of producing gametes (sperm and eggs) through meiosis. ## Footnote This process results in genetically distinct daughter cells.
282
What determines genetic sex?
Sex chromosomes: XX for females and XY for males. ## Footnote The inheritance of sex chromosomes from parents determines an individual's genetic sex.
283
What is the role of the SRY gene?
Encodes a transcription factor that initiates male sexual differentiation. ## Footnote The presence of the Y chromosome and SRY gene leads to the development of male characteristics.
284
What is the significance of the Anti-Müllerian hormone (AMH)?
Induces degeneration of Müllerian ducts, preventing female reproductive tract development in males. ## Footnote AMH is critical for male sexual differentiation.
285
Describe oogenesis.
The process of egg formation in the ovaries, starting in fetal life and resuming at puberty. ## Footnote It involves meiotic division leading to the production of a secondary oocyte and a polar body.
286
What triggers the onset of puberty in females?
High pulses of Gonadotropin Releasing Hormone (GnRH). ## Footnote GnRH stimulates the release of FSH and LH from the anterior pituitary.
287
What are the phases of the menstrual cycle based on follicular histology?
Follicular phase, ovulatory phase, luteal phase ## Footnote Each phase is defined by specific hormonal and physiological changes.
288
What is the role of the corpus luteum?
Produces progesterone and estrogen to prepare the uterine lining for potential pregnancy. ## Footnote If fertilization does not occur, the corpus luteum degenerates.
289
What is the average length of the menstrual cycle?
21-35 days from the first day of bleeding to the last day before the next bleed. ## Footnote The cycle length can vary among individuals.
290
What hormones are involved in the regulation of the menstrual cycle?
Gonadotropin Releasing Hormone (GnRH), Follicle Stimulating Hormone (FSH), Luteinizing Hormone (LH), estrogen, and progesterone. ## Footnote These hormones work together to regulate the cyclic nature of the menstrual cycle.
291
Fill in the blank: The combined oral contraceptive pill (COCP) includes an estrogen and _______.
progestogen ## Footnote COCP is used to prevent ovulation and regulate menstrual cycles.
292
True or False: The luteal phase follows ovulation and involves the development of the corpus luteum.
True ## Footnote This phase is critical for preparing the uterus for possible implantation.
293
What occurs during the ovulatory phase?
Release of the oocyte from the mature follicle. ## Footnote This phase is characterized by a surge in LH levels.
294
What happens if fertilization does not occur?
The endometrial lining sheds during menstruation. ## Footnote This process is a key part of the menstrual cycle.
295
How does the contraceptive implant work?
Releases progestogen to prevent pregnancy for up to 3 years. ## Footnote It is an effective long-term contraceptive method.
296
What is the impact of menopause on the menstrual cycle?
Cessation of menstruation due to depletion of ovarian follicles and reduced sensitivity to FSH and LH. ## Footnote Menopause typically occurs between ages 45-55.
297
What is the role of corpus luteum?
Secretes progesterone to either regrow the uterine lining or support pregnancy.
298
What primarily causes menopause?
Depletion of the finite pool of follicles and reduced sensitivity to FSH and LH.
299
What are the consequences of menopause?
Cessation of the menstrual cycle, excess of LH and FSH, deficiency in Oestrogen and Progesterone.
300
Define corpus luteum.
A yellow mass of cells that forms from an ovarian follicle during the luteal phase of the menstrual cycle.
301
What is menopause?
The ending of menstruation; the time in a woman’s life when this happens.
302
What is endometrium?
The mucous membrane that lines the uterus in mammals.
303
What is oestradiol?
A potent oestrogenic hormone produced in the ovaries of all vertebrates.
304
What is menstruation?
The periodic discharging of the menses, the flow of blood and cells from the lining of the uterus.
305
Where does fertilization need to occur?
In the fallopian tube within a couple of days of ovulation.
306
What triggers the acrosomal reaction in sperm?
The binding of the sperm to the zona pellucida.
307
What is a zygote?
The cell formed by the union of two gametes, especially a fertilized ovum before cleavage.
308
What does totipotent mean?
The cell has the capacity to develop into a complete organism.
309
What is a conceptus?
Term for everything derived from the zygote.
310
What happens after 3/4 days post-fertilization?
Conceptus reaches the uterus, totipotency is lost, and it develops into a blastocyst.
311
What role does progesterone play during pregnancy?
Prepares the lining of the uterus for implantation.
312
When can human chorionic gonadotropin (hCG) be detected?
In urine or blood after implantation, which occurs six to twelve days after fertilization.
313
What do trophoblasts do?
Provide nutrients to the developing embryo during the first 3 months.
314
What is the critical switch in pregnancy maintenance?
The switch from the corpus luteum to the placenta producing progesterone and oestradiol.
315
What is the primary cause of female infertility?
Ovulation disorders, accounts for about 25% of infertile couples.
316
What is polycystic ovary syndrome (PCOS)?
Most common cause of female infertility, caused by increased androgen and LH secretion.
317
What is endometriosis?
Tissue that normally grows in the uterus implants and grows in other locations.
318
What is cervical stenosis?
A cervical narrowing that can be caused by an inherited malformation or damage.
319
What is unexplained infertility?
Infertility with no identified cause after evaluation.
320
True or False: The corpus luteum continues to function throughout the entire pregnancy.
False
321
Fill in the blank: The blastocyst develops into an _______ about 10 to 12 days after fertilization.
embryo
322
What hormone is crucial for contractions during labor?
Oxytocin
323
What are fertility medicines usually prescribed for?
To help ovulation problems ## Footnote Examples include Clomifene (Clomid) and Tamoxifen.
324
What is Metformin used for in fertility treatment?
Stimulating ovulation, encouraging regular monthly periods, lowering the risk of miscarriage, and managing polycystic ovary syndrome ## Footnote It also has long-term health benefits.
325
What are Gonadotrophins used for?
If unsuccessful with Clomid and/or Metformin, also used in men to improve sperm production ## Footnote High risk of multiple births.
326
What is a trans-vaginal ultrasound scan used for?
To check the health of ovaries and womb ## Footnote Can help identify conditions like endometriosis and fibroids.
327
What is endometriosis?
A condition where tissue that behaves like the lining of the womb is found outside the womb.
328
What is laparoscopy?
Keyhole surgery to examine the health of the womb, fallopian tubes, and ovaries ## Footnote A dye may be injected to highlight blockages.
329
What percentage of cases of persistent failure to become pregnant can be explained by fertility tests?
80%
330
What is the recommended daily dose of folic acid for women at risk of neural tube defects?
5 milligrams until 12 weeks pregnant ## Footnote Regular 400 micrograms advised while trying to conceive.
331
What is the purpose of a chlamydia test in fertility assessments?
To identify the most common STI that can cause pelvic inflammatory disease and fertility problems.
332
What is a hysterosalpingogram (HSG)?
An X-ray of the fallopian tubes using opaque dye to check for blockages.
333
At what stage do women have about 4 million eggs?
Zygote stage
334
How many eggs do women have at birth?
About 1 million
335
What is the average lifespan of sperm in a woman's body?
Up to 5 days, or up to 7 days under optimal conditions.
336
What is the average daily sperm production in men?
Around 150-1,000 million sperms
337
What is the role of folic acid during pregnancy?
Important for the development of a healthy foetus and reduces the risk of neural tube defects.
338
What hormone do ovulation test kits detect?
Luteinising hormone (LH)
339
What are signs of ovulation?
* Change in cervical fluid * Increase in basal body temperature * Change in cervical position or firmness
340
What is a zygote?
The very first stage of life after the union of egg and sperm.
341
What is the embryonic period?
The active cell division period of conception from 24 hours to 8 weeks after fertilization.
342
What is assisted conception?
Methods like intrauterine insemination (IUI) and in vitro fertilisation (IVF) to help with fertility issues.
343
What is the legal requirement for egg and sperm donors in the UK since April 1, 2005?
Donors must provide information about their identity.
344
What is the definition of infertility?
Failure to conceive after a year of regular intercourse without contraception.
345
What are the two types of infertility?
* Primary infertility * Secondary infertility
346
What is oligozoospermia?
Low sperm count, < 15 million spermatozoa per millilitre of ejaculate.
347
What is azoospermia?
No sperm count due to production issues or blockage.
348
What is the average menstrual cycle length for women of childbearing age?
Approximately 28 days, but can vary between 24 and 35 days.
349
What physical examinations can be performed on couples trying to conceive?
* Weigh (BMI) * Pelvic examination for women * Penile/testicular examination for men
350
What is thromboprophylaxis?
A preventive treatment to reduce the risk of blood clots during surgery ## Footnote Includes the use of unfractionated or low molecular weight heparin and compression stockings.
351
What factors increase the risk of pregnancy while using LAM?
Pregnancy risk increases if: * Breast-feeding decreases * Menstruation resumes * The woman is more than six months postpartum ## Footnote LAM stands for Lactational Amenorrhea Method.
352
What is the standard regimen for Combined Hormonal Contraceptive (CHC) use?
21 days of active pills followed by a 7-day hormone-free interval ## Footnote This regimen mimics natural menstrual cycles.
353
What are the drawbacks of the 7-day hormone-free interval (HFI) in CHC use?
Drawbacks include: * Heavy or painful withdrawal bleeding * Symptoms like headache and mood changes * Reduced ovarian suppression * Risk of ovulation and potential pregnancy ## Footnote It highlights the risks associated with the standard use of CHC.
354
What are the tailored CHC regimens?
Tailored regimens include: * Shortened HFI * Extended use (tricycling) * Flexible extended use * Continuous use ## Footnote These regimens aim to reduce or avoid HFI-associated symptoms.
355
What are key indications for medical review for women using CHC?
Key indications include: * High blood pressure * High body mass index (>35 kg/m2) * Migraine or migraine with aura * Deep vein thrombosis or pulmonary embolism * Blood clotting abnormalities * Cardiovascular diseases * Certain cancers ## Footnote This ensures the safety and suitability of CHC use.
356
What should be assessed before prescribing CHC?
Assessment should include: * Medical history * Drug history * Recent blood pressure recording * BMI ## Footnote Pelvic examination is not routinely required.
357
What is the Lactational Amenorrhea Method (LAM)?
A method of avoiding pregnancy based on natural postpartum infertility associated with fully breast-feeding ## Footnote It is about 98% effective if certain conditions are met.
358
What should a woman do if she vomits within 2 hours of taking a contraceptive pill?
She should take another pill immediately if she is not sick again ## Footnote This ensures continued protection against pregnancy.
359
What are the suitable alternatives to Combined Oral Contraceptives (CoC) for certain medical conditions?
Alternatives include: * Progestogen-only contraceptives * Long-acting reversible contraceptives (LARCs) ## Footnote These are suitable for women with a history of venous thrombosis, heavy smokers, and others at high risk.
360
What is the risk associated with using anti-epileptic drugs and hormonal contraceptives?
Most anti-epileptic drugs can reduce the efficacy of hormonal contraceptives ## Footnote Women on these medications should consider LARCs.
361
What are the methods of contraception that have no user failure?
Methods include: * Contraceptive injection * Implant * Intra-Uterine System (IUS) * Intra-Uterine Device (IUD) * Vasectomy * Female sterilization ## Footnote These methods are effective without reliance on user compliance.
362
What are the methods of contraception that may have user failure?
Methods include: * Patch * Combined oral contraceptives * Progestogen-only pills * Condoms (male and female) * Diaphragms * Natural methods * Vaginal rings ## Footnote User failure can occur due to improper use or non-compliance.
363
What defines a missed pill for Combined Oral Contraceptives (COC)?
A missed pill is defined as one that is more than 24 hours late ## Footnote For Progestogen-only Pill (POP), it is more than 3 hours late.
364
What are the non-contraceptive health benefits of CHC?
Benefits include: * Reduction in heavy menstrual bleeding and pain * Improvement of acne * Reduced risk of endometrial and ovarian cancer * Management of symptoms associated with PCOS ## Footnote These benefits can enhance quality of life.
365
What are the risks associated with CHC use?
Risks include: * Increased risk of VTE * Small increased risk of myocardial infarction and stroke * Increased risk of breast and cervical cancer ## Footnote The absolute risks remain low for individual users.
366
What are dietary sources of folic acid?
Sources include: * Green, leafy vegetables * Brown rice * Granary bread * Fortified breakfast cereals ## Footnote Supplements are often necessary to meet recommended levels.
367
What is the preferred action regarding CoC prior to major elective surgery?
CoC should be discontinued 4 weeks prior to major elective surgery ## Footnote Ensure an alternative contraceptive is in place.
368
What is a contraceptive implant?
A long-acting reversible contraceptive method that is inserted under the skin
369
What is a contraceptive injection?
A hormonal method of contraception administered via injection
370
What is a contraceptive patch?
A transdermal patch that releases hormones to prevent pregnancy
371
What are diaphragms?
Barrier devices inserted into the vagina to prevent sperm from reaching the uterus
372
What is an intrauterine device (IUD)?
A small T-shaped device inserted into the uterus to prevent pregnancy
373
What is an intrauterine system (IUS)?
A type of IUD that releases hormones to prevent pregnancy
374
What is natural family planning?
A method of tracking fertility to avoid or achieve pregnancy
375
What is progestogen-only pill?
A hormonal contraceptive pill that contains only progestogen
376
What is a vaginal ring?
A flexible ring inserted into the vagina that releases hormones
377
What is female sterilisation?
A permanent method of contraception involving surgical procedures to block or seal the fallopian tubes
378
What is male sterilisation (vasectomy)?
A permanent method of contraception involving surgical procedures to cut or seal the vas deferens
379
Why are female sterilisation and male sterilisation considered permanent methods?
Reversal is difficult and not always successful
380
What does LARC stand for?
Long-Acting Reversible Contraceptives
381
What are the two types of hormonal contraception?
Combined Hormonal Contraception (CHC) and Progestogen Only Contraception (POC)
382
What does Combined Hormonal Contraception (CHC) contain?
Both estrogen and progesterone
383
What is the mechanism of action (MOA) for Combined Hormonal Contraception (CHC)?
Acts on the hypothalamopituitary-ovarian axis to suppress LH & FSH and thus inhibit ovulation
384
What are the forms of Combined Hormonal Contraception (CHC)?
* CoC (pill) * CTP (patch) * CVR (ring)
385
What is the mechanism of action (MOA) for Progestogen Only Contraception (POC)?
Inhibit ovulation and thicken cervical mucus
386
What are the forms of Progestogen Only Contraception (POC)?
* PoP (pill) * PTP (patch) * PVR (ring)
387
What can uncontrolled hypothyroidism impair?
Fertility ## Footnote Insufficient thyroid hormone can have teratogenic effects and even lead to miscarriage.
388
What should patients with confirmed thyroid disease planning a pregnancy do?
Consult with their GP/specialist and have frequent TSH level monitoring.
389
By how much should the levothyroxine dose be increased once pregnant?
By 25-50 micrograms immediately.
390
How often should TSH levels be monitored during pregnancy?
Every 4-6 weeks.
391
What is the target TSH level in the first trimester?
<2.5 mU/L.
392
What is the target TSH level in the third trimester?
<3.0 mU/L.
393
When should TSH levels be re-checked post-birth?
2-4 weeks post-birth.
394
What is the usual starting dose of Levothyroxine?
1.6 micrograms per kg rounded to the nearest 25 microgram dose.
395
What are the symptoms of primary hypothyroidism?
* Fatigue * Hoarse voice * Bradycardia * Diastolic hypertension * Pericardial effusion * Weight gain * Decreased appetite * Abdominal distension * Constipation * Increased sensitivity to cold * Low mood * Impaired cognition * Paraesthesia * Peripheral neuropathy * Non-specific muscle weakness or pain * Joint pain * Irregular menstrual cycle and menorrhagia * Infertility or subfertility * Dry, flaking, thickened skin * Goitre * Reduced sweating * Yellow complexion * Facial swelling, particularly of the eyelids * Brittle nails * Coarse hair * Hair loss, particularly of the eyebrows.
396
What hormone does the thyroid secrete to maintain calcium levels?
Calcitonin.
397
What does a raised TSH level and low FT4 suggest?
Overt primary hypothyroidism.
398
What indicates subclinical primary hypothyroidism?
Slightly raised TSH level with FT4 still within the normal reference range.
399
What does a low TSH level and low FT4 suggest?
Secondary hypothyroidism arising from hypothalamic or pituitary dysfunction.
400
What is Liothyronine?
Synthetic form of T3, x5 more potent than Levothyroxine.
401
What is the first line treatment for hypothyroidism?
Levothyroxine (T4) replacement.
402
What are the side effects of Levothyroxine?
* Flushing * Restlessness * Palpitations * Insomnia * Angina * Thyroid crisis.
403
How should Levothyroxine be taken?
30 to 60 minutes before food or other medication.
404
What is the importance of brand consistency for patients on Levothyroxine?
It can be important for maintaining stable hormone levels.
405
What are the additional investigations for thyroid function?
* Thyroid antibodies testing * Thyroid Peroxidase Antibodies (TPOAb) * Thyroglobulin Antibodies (TgAb) * Thyroid Stimulating Hormone Receptor Antibodies (TSHR Ab, also known as TRAb).
406
What should be done if TSH is within normal limits but symptoms are still present?
Test FT4 to investigate for secondary hypothyroidism.
407
What adjustments are made for patients over 65 years or with pre-existing CVD?
Reduced starting dose of 25-50 micrograms OD due to risks of overtreatment.
408
What should be done for those with glucocorticoid deficiency before starting thyroxine?
They should be given replacement therapy.
409
What is the usual stabilization dose for most adult patients on Levothyroxine?
Between 100 micrograms – 200 micrograms daily.
410
How long can it take for TSH to normalize?
Up to 6 months.
411
What is the initial monitoring frequency for TFTs until stable?
Every 3 months.
412
What are the two main antithyroid drugs mentioned?
Carbimazole and Propylthiouracil
413
What is the first-line treatment for Graves' disease unless contraindicated?
Thionamides; carbimazole
414
How long does it typically take for carbimazole to show therapeutic benefit?
6-8 weeks
415
What is the remission induction rate for patients with Graves' disease using antithyroid drugs?
Around 50%
416
What are the two regimen choices for antithyroid drug treatment?
* Titration * Block and Replace
417
What is the first-line treatment for patients unlikely to go into remission from Graves' disease?
Radioactive iodine
418
What is the first-line treatment for multinodular goitre?
Radioactive iodine
419
What is the first-line treatment for a single nodular adenoma?
* Radioactive iodine * Surgical intervention (total or hemi-thyroidectomy)
420
What is contraindicated in both pregnancy and breastfeeding?
Radioactive iodine
421
What should be checked every 6-8 weeks during treatment with antithyroid drugs?
Thyroid function tests (TFTs)
422
What does a low TSH level with raised FT4 and FT3 suggest?
Hyperthyroidism of thyroidal origin
423
What can be a rare cause of hyperthyroidism indicated by high TSH and raised FT4 and FT3?
Hyperthyroidism of extrathyroidal origin
424
What are the symptoms of thyroiditis?
* Painful and tender thyroid follicles * Fever * Sore throat
425
What are the symptoms of thyrotoxicosis?
* Tachycardia * Shortness of breath * Weight loss
426
What are some neuromuscular symptoms of hyperthyroidism?
* Insomnia * Muscle weakness * Fine motor tremor
427
What is myxedema crisis?
Extreme manifestation of hypothyroidism that can be fatal
428
What are the symptoms of myxedema crisis?
* Hypothermia * Macroglossia * Periorbital swelling
429
What does the GREAT score assess?
Relapse risk in Graves' disease
430
What are the classes of the GREAT score and their relapse distribution?
* Class I (0-1 points): 33.8% * Class II (2-3 points): 59.4% * Class III (4-6 points): 73.6%
431
What is the initial dose range for carbimazole?
20-60mg daily in divided doses
432
What is a side effect of carbimazole?
Bone marrow suppression
433
What should patients be counseled about when starting carbimazole?
Signs and symptoms of blood dyscrasias
434
What is the mechanism of action of propylthiouracil?
Inhibits organification of iodide and conversion of T4 to T3
435
What is the initial dose range for propylthiouracil?
200-400mg once daily
436
What is a serious side effect of propylthiouracil?
Severe hepatic reaction causing acute liver injury
437
What is a common side effect of Propylthiouracil?
Macropapular rash ## Footnote Can be treated with a generic antihistamine.
438
What severe reaction can Propylthiouracil cause?
Severe hepatic reaction causing acute liver injury ## Footnote Some cases were fatal and some required liver transplant.
439
What are potential blood-related side effects of Propylthiouracil?
Bone marrow suppression, thrombocytopenia, risk of agranulocytosis ## Footnote Patients need to be counselled on signs and symptoms of blood dyscrasias.
440
What signs and symptoms should patients be counselled on regarding blood dyscrasias?
* Sore throat * Bruising * Bleeding * Mouth ulcers * Fevers * Malaise
441
How often should a full blood count be checked during treatment with Propylthiouracil?
Baseline and every 6 months during treatment
442
What is a contraindication for Propylthiouracil?
Severe hepatic impairment ## Footnote Unable to be metabolised to active methimazole.
443
What history may exacerbate the use of Propylthiouracil?
History of pancreatitis
444
What additional medications may be needed for symptom management when using Propylthiouracil?
Beta blockers
445
How long may it take for Propylthiouracil to show observable effects?
Six to eight weeks ## Footnote Does not alter existing levels of T3 and T4.
446
What symptoms should patients report urgently when taking Propylthiouracil?
* Severe sore throats * Bruising or bleeding * Mouth ulcers * Fever * Malaise
447
What serious hepatic reactions have been reported with Propylthiouracil?
Severe hepatic reactions, including fatal cases and cases requiring liver transplant ## Footnote Report any jaundice, dark urine, abdominal pain, pruritis, nausea, and vomiting.
448
When should treatment with Propylthiouracil be stopped?
If significant hepatic enzyme abnormalities develop
449
What is Carbimazole classified as?
Pro-drug ## Footnote Undergoes metabolism by hepatic enzymes to the active metabolite, thiamazole (methimazole).
450
Why is Carbimazole the first line choice?
Due to quick thyroid hormone correction (4-8 weeks)
451
What is the mechanism of action of Carbimazole?
Inhibition of the organification of iodide and thyroglobulin, and the coupling of iodothyronine residues ## Footnote Suppresses the synthesis of thyroid hormones.
452
What effect does excess dietary iodine have on thyroid hormone release?
Inhibits thyroid hormone release due to the Wolff-Chaikoff effect ## Footnote The Wolff-Chaikoff effect describes how high levels of iodine can suppress thyroid hormone production.
453
What is the recommended dosage of Lugol's Solution for inhibiting hormone release?
1ml every 6 to 8 hours ## Footnote Dosage may vary depending on patient presentation.
454
What is the minimum gap required between thionamide and iodine administrations?
At least one hour ## Footnote This ensures adequate uptake of thionamides into the thyroid.
455
What is the risk associated with lithium carbonate when used for inhibiting hormone release?
High risk of lithium toxicity ## Footnote Lithium carbonate is rarely used due to this significant risk.
456
How often should TSH be measured post radioactive iodine treatment?
Every 6 weeks until within reference range
457
What should be done if hyperthyroidism persists 6 months post ablation?
Consider alternative therapy
458
When should thionamides be stopped after radioactive iodine treatment?
Once TSH is within reference range
459
What percentage of patients post ablation will require levothyroxine?
50%
460
What should be done 1 week prior to receiving radioactive iodine treatment?
Stop carbimazole or propylthiouracil
461
How long does it take for radioactive iodine to have a clinical effect?
2-3 months
462
For how long are patients considered radioactive after a standard dose of radioactive iodine?
Up to 6 weeks
463
What precautions should patients take after radiation exposure?
Avoid close contact with others for 14 days and completely avoid pregnant women and children for 24 days
464
What is the aim of radioactive iodine treatment?
To resolve hyperthyroidism without post-ablation hypothyroidism
465
What are the two methods of dosing radiation administered?
* Fixed dose regardless of other factors * Adjusted dose based on size of enlarged thyroid/goiter
466
How often should TSH, T4, and T3 be monitored after starting treatment?
Every 6 weeks until TSH is within reference range
467
What is the post-treatment TSH monitoring schedule after stopping treatment?
8 weeks post-cessation, then every 3 months for 1 year
468
What is a vital indication for thyroidectomy?
Symptoms of windpipe compression due to the size of goiter or enlargement
469
What should be monitored at 2 and 6 months post hemithyroidectomy?
TSH
470
What is the risk of thyroid crisis?
It can lead to multiorgan failure and is often fatal
471
What can precipitate a thyroid crisis?
* Infection * Trauma * Medications (e.g., amiodarone) * Sudden cessation of thionamides * Surgery
472
What are some symptoms of thyroid crisis?
* Hyperthermia (over 41°C) * Tachycardia (heart rate > 140 bpm) * Hypotension * Confusion or agitation
473
What are the treatment mechanisms for thyroid crisis?
* Inhibition of thyroid hormone synthesis * Inhibition of thyroid hormone release * Inhibition of peripheral action of excess thyroid hormone * Supplementary management
474
What is the typical first agent of choice for inhibiting peripheral hormone action?
Propranolol
475
What is the standard loading dose for propylthiouracil?
600mg loading dose, followed by 200-250 mg every 4-6 hours
476
What medication should be administered for high temperature in thyroid crisis?
Paracetamol
477
What is the function of cholestyramine in thyroid crisis management?
Enhances thyroid hormone excretion by increasing enterohepatic circulation
478
What is the role of glucocorticoids in thyroid crisis?
Inhibit peripheral T4 to T3 conversion
479
What are the key features of emergency contraception?
Intended for emergency use, not regular contraception, can be used 5 days after abortion or miscarriage, can be used on any day of the menstrual cycle.
480
What types of emergency contraception (EC) are available?
* Copper Intrauterine Device (Cu IUD) * Oral EC * Levonorgestrel (LNG-EC) * Ulipristal (UPA-EC)
481
What is the most effective form of emergency contraception?
Copper Intrauterine Device (Cu IUD)
482
How does the Copper IUD work?
* Inhibits fertilisation * Affects movement and viability of sperm * Causes local inflammatory reaction preventing implantation
483
How does Levonorgestrel (LNG-EC) work?
Inhibits ovulation by delaying or preventing follicular rupture and causing luteal dysfunction for five days.
484
What is the licensed timeframe for Levonorgestrel after unprotected sexual intercourse (UPSI)?
Licensed for UPSI which has occurred in the last 72 hours (3 days).
485
What is the licensed timeframe for Ulipristal after UPSI?
Licensed for UPSI occurring in the last 120 hours (5 days).
486
What are common adverse effects of emergency contraception?
* Headache * Nausea * Dysmenorrhoea
487
True or False: Ulipristal is effective even after the start of the LH surge.
True
488
What should be done if vomiting occurs within 3 hours of taking emergency contraception?
Need another supply.
489
What is the age limit for Levonorgestrel sale?
Not licensed for sale to under 16 years.
490
What is the recommendation for breastfeeding women taking UPA-EC?
Advise expressing and discarding breast milk for one week following the dose.
491
What are some interactions that affect emergency contraception?
* Ulipristal and St John’s Wort * Levonorgestrel and Carbamazepine * Levonorgestrel and Sodium Valproate
492
Fill in the blank: Emergency contraception is intended for _______ use and not as a form of regular contraception.
emergency
493
What should be considered if a patient is under 16 years requesting emergency contraception?
Fraser competency applies.
494
What should be done if a girl under 13 years presents for emergency contraception?
Cannot consent to have sex; safeguarding concerns arise.
495
What risk is associated with taking emergency contraception if pregnancy is suspected?
Risk of ectopic pregnancy.
496
What advice should be given regarding menstruation after taking emergency contraception?
Alteration in menstruation can occur; advise seeking help if period is delayed more than 7 days.
497
What is the role of consultation in the emergency contraception process?
To assess needs, provide information, and ensure appropriate supply.
498
What is the significance of a Patient Group Directive (PGD) in emergency contraception?
Allows supply of emergency contraception under specific guidelines.
499
What is the recommended action if a patient has missed progesterone-only pills?
Consider if UPA will be effective.
500
What should be done if a patient requests advance supply of emergency contraception?
Discuss potential scenarios and assess necessity.
501
What is the effectiveness of LNG-EC compared to UPA-EC?
UPA-EC is generally more effective than LNG-EC.
502
What resources are available for guidance on emergency contraception?
* NICE CKS * FSRH guidance * SPC / BNF * NHS UK * GPhC * Stockley Interactions * CPPE * C&D
503
Define what type 2 diabetes is
A condition with chronically raised blood glucose concentration due to a lack of insulin or deficiency in insulin action.
504
What is the peak age of onset for type 1 diabetes mellitus?
12 years
505
What percentage of all diabetics does type 1 diabetes account for?
Approx. 8%
506
What is the peak age of onset for type 2 diabetes mellitus?
60 years
507
What percentage of all diabetics does type 2 diabetes account for?
Approx. 90%
508
What is the relationship between obesity and type 2 diabetes?
>85% of type 2 diabetics are obese
509
What is gestational diabetes?
A type of diabetes that occurs in approximately 16% of pregnancies.
510
What is the normal HbA1c level?
Below 42 mmol/mol (6.0%)
511
What HbA1c level indicates diabetes?
48 mmol/mol (6.5% or over)
512
What is the purpose of an Oral Glucose Tolerance Test (OGTT)?
To measure blood glucose levels after fasting and consuming a glucose solution.
513
What are the diagnostic criteria for fasting plasma glucose levels?
Normal: Below 5.5 mmol/l; Prediabetes: 5.5 to 6.9 mmol/l; Diabetes: 7.0 mmol/l or more.
514
What are the two main components in the development of type 2 diabetes?
* Insulin Resistance * Beta-cell dysfunction and death
515
What is insulin resistance?
A condition where insulin-sensitive tissues fail to fully respond to insulin.
516
What is the concordance rate of type 2 diabetes in monozygotic twins?
About 70%
517
What are the risk factors for developing type 2 diabetes?
* Obesity * Age * Low birth weight * Gestational diabetes * Social economic status * Ethnicity
518
True or False: The prevalence of type 2 diabetes is more common in deprived social groups.
True
519
What is the estimated percentage of type 2 diabetes risk attributed to genetics?
30%-70%
520
Fill in the blank: The fasting plasma glucose test is usually taken after at least _______ hours of fasting.
eight
521
What is the significance of elevated ectopic fat in relation to insulin resistance?
It increases FA metabolites that inhibit key insulin signaling proteins.
522
What is the effect of aging on insulin resistance?
Increases risk of insulin resistance.
523
What is the relationship between genetics and family history in type 2 diabetes?
If either parent has type 2 diabetes, the risk of inheritance is 15%; if both parents have it, the risk is 75%.
524
What is the role of adipocytes in insulin resistance?
Adipocytes that are 'stuffed' cannot store more TAG, leading to increased release of FAs.
525
What does the term 'hyperlipidemia' refer to?
Increased levels of circulating lipids.
526
What can reduce insulin sensitivity?
* Obesity * Aging * Lack of exercise * Certain medications
527
What is ectopic fat?
Ectopic fat refers to fat stored in locations outside of the usual fat depots, which can lead to metabolic issues.
528
What effect does elevated ectopic fat have on insulin signaling?
Elevated levels of ectopic fat cause an increase in FA metabolites that inhibit key insulin signaling proteins.
529
What is hyperinsulinemia?
Hyperinsulinemia is the overactivation of the insulin signaling pathway, leading to reduced insulin receptor signaling through negative feedback mechanisms.
530
What causes cellular stress related to insulin signaling?
Increased metabolism due to over-nutrition causes cellular stress (oxidative and ER stress) which inhibits insulin signaling.
531
How does inflammation affect insulin signaling?
Chronic inflammation from increased adipose tissue size and cytokine levels activates signaling pathways that inhibit insulin signaling.
532
What is beta cell mass?
Beta cell mass is defined by the number and size/volume of beta cells in the pancreas.
533
What are the manifestations of beta cell dysfunction?
* Loss of pulsatile insulin secretion * Loss of first phase insulin secretion * Reduced glucose-stimulated insulin secretion * Reduced insulin content * Increased secretion of proinsulin
534
What is glucolipotoxicity?
Glucolipotoxicity refers to the harmful effects of high circulating levels of glucose and free fatty acids on beta cells.
535
What role does ER stress play in beta cell function?
ER stress occurs when the demand for insulin exceeds the processing capacity of the beta cells, leading to dysfunction.
536
What are amylin deposits and their effect on beta cells?
Amylin deposits result from increased secretion of amylin with insulin, causing cellular dysfunction and death.
537
What is the primary action of Metformin?
Metformin improves insulin sensitivity and glucose clearance by enhancing peripheral glucose uptake and decreasing hepatic glucose production.
538
What is the mechanism of action (MOA) of Metformin?
Metformin inhibits the mitochondrial respiratory chain (complex I), activating AMP-activated protein kinase (AMPK).
539
What are thiazolidinediones (TZDs) and their primary MOA?
TZDs are drugs that bind to the peroxisome proliferator-activated receptor-γ (PPARγ) to increase the expression of insulin sensitivity genes.
540
Name a first-generation thiazolidinedione.
Troglitazone.
541
Which thiazolidinedione was withdrawn due to cardiotoxic effects?
Rosiglitazone.
542
What is the mechanism of action of sodium-glucose co-transporter 2 inhibitors (SGLT2i)?
SGLT2i reduce renal glucose reabsorption in proximal tubules by inhibiting SGLT2.
543
List examples of SGLT2 inhibitors.
* Dapagliflozin * Canagliflozin * Empagliflozin
544
What is the mechanism of action of sulphonylureas?
Sulphonylureas bind to the ATP-sensitive K+ channel, leading to channel closure and stimulating insulin secretion.
545
What is the incretin effect?
The incretin effect refers to the potentiation of glucose-induced insulin secretion by incretin hormones.
546
What are the two main incretin peptides?
* Glucagon-like peptide-1 (GLP-1) * Gastric inhibitory peptide (GIP)
547
What happens to incretin action in type 2 diabetes?
There is reduced GLP-1 secretion and almost complete loss of GIP action.
548
What is Exenatide?
Exenatide (Byetta) is a synthetic form of exendin-4, a peptide that promotes insulin secretion.
549
What is the Gila monster?
A poisonous lizard found in North America. Exenatide idea from this.
550
How often does the Gila monster eat?
Four times a year
551
What is secreted in the saliva of the Gila monster when it eats?
Exendin-4
552
What is the role of exendin-4?
Helps the pancreas to produce insulin
553
What is exenatide?
A synthetic form of exendin-4
554
What type of drug is exenatide?
A GLP1R agonist
555
Is exenatide an analogue of GLP?
No
556
What was the first GLP-1R agonist approved for the treatment of type-2 diabetes?
Exenatide (2005)
557
What is the stability of exenatide?
Resistant to degradation by DPP-4 and extends its half-life
558
How is exenatide administered?
By injection
559
What is liraglutide?
An analogue of GLP1 (97% homology)
560
What is the brand name for liraglutide?
Victoza
561
What are some examples of GLP-1 receptor agonists?
* Exenatide (Byetta, Bydureon) * Tirzepatide (Mounjaro, Zepbound) * Liraglutide (Victoza) * Lixisenatide (Lixumia) * Dulaglutide (Trulicity) * Semaglutide (Ozempic)
562
How many GLP-1 receptor agonists are currently available in the UK?
Six
563
What are Dipeptidyl peptidase-4 (DPP-4) inhibitors?
Protease inhibitors that target the enzyme DPP-4
564
What is the function of DPP-4?
Degrades GLP1
565
How are DPP-4 inhibitors administered?
Orally in tablet form
566
What are some examples of DPP-4 inhibitors?
* Sitagliptin (Januvia) * Vildagliptin (Galvus) * Saxagliptin (Onglyza) * Alogliptin (Vipidia) * Linagliptin (Trajenta)
567
What are alpha-glucosidase inhibitors?
Drugs that reduce glucose absorption
568
What do alpha-glucosidases do?
Breaks down polysaccharides and disaccharides to glucose
569
What is the effect of inhibiting alpha-glucosidase?
Delays carbohydrate digestion and absorption, lowers postprandial blood glucose
570
What are examples of alpha-glucosidase inhibitors?
* Acarbose (Precose) * Miglitol (Glyset)
571
Are there currently any drugs that preserve beta-cell function?
No
572
Can the rate of decline of beta-cell function be slowed down?
Yes
573
What is obesity?
Excessively high amount of body fat in relation to lean body mass. ## Footnote Generally agreed that men with over 25% body fat and women with more than 30% body fat are obese.
574
What is the Body Mass Index (BMI) formula?
BMI = Weight (Kg) / Height (m)² ## Footnote BMI categories: Normal (18.5 - <25), Overweight (25 - <30), Obese (30 - <40), Morbid obesity (>40).
575
What was the percentage of adults aged 18 years and over who were overweight in 2016?
39% were overweight and 13% were obese.
576
What is the relationship between waist-hip ratio and obesity-related diseases?
Greater correlation between obesity-related disease and waist-hip ratio than BMI. ## Footnote Increased waist/hip ratio indicates increased risk of obesity-related disease.
577
How is abdominal obesity defined according to the WHO?
Waist-hip ratio above 0.90 for males and above 0.85 for females.
578
What causes obesity?
Chronic imbalance between energy input and expenditure.
579
What is Basal Metabolic Rate (BMR)?
Measured by determining the rate of O2 utilization over a given time period at rest at a set temperature.
580
What factors can affect BMR?
* Body mass and composition * Hormones (e.g., Thyroid Hormone) * Growth Hormone * Sleep * Malnutrition * Temperature
581
What is the impact of food availability on obesity?
Increased food availability and reduced food prices contribute to higher obesity rates.
582
What is leptin and its role in body weight regulation?
Leptin is a hormone synthesized and secreted from adipocytes that regulates body weight by influencing appetite and metabolism.
583
What is the function of ghrelin?
Ghrelin is the hunger hormone released in anticipation of food intake.
584
What is the impact of insulin on body weight?
Insulin promotes food intake and increases body weight by promoting glucose storage into fat.
585
What are the two components of weight regulation?
* Hunger varies inversely with body weight * Metabolism varies directly with body weight
586
True or False: Obesity is considered a preventable condition.
True.
587
What are the health risks associated with obesity?
Obesity is linked to numerous health risks including heart disease, diabetes, and certain cancers.
588
What role do gut hormones play in appetite regulation?
Gut hormones are released in response to food intake and promote a feeling of satiety.
589
What is the obesity epidemic?
A global increase in obesity rates that poses significant public health challenges.
590
Fill in the blank: The advised daily human calorie intake is _______ calories.
2,000 calories.
591
What percentage of the world's population lives in countries where overweight and obesity kill more people than underweight?
Most of the world's population.
592
What is the importance of understanding the causes of obesity?
To develop effective prevention and treatment strategies.
593
What mediates the short-term feeling of hunger and satiety?
Signals from the gut, stomach, liver, and pancreas to the brain.
594
Which hormones are involved in long-term regulation of body weight?
Leptin.
595
What is the risk of a child being overweight if both parents are obese?
80%.
596
What is the risk of a child being overweight if one parent is obese?
40%.
597
What is the concordance rate of obesity in monozygotic twins?
65-70%.
598
What is the heritability estimate of obesity?
50-70%.
599
What do GWAS studies identify in relation to obesity?
Polymorphisms in many genes associated with increased risk of becoming obese.
600
What is the common polymorphism associated with obesity in the FTO gene?
Homozygotes weigh an average of 3kg more and have a 1.67-fold increased risk of obesity.
601
What is monogenic obesity?
Obesity caused by a mutation in a single gene.
602
Which receptor is most commonly associated with monogenic obesity in children?
Melanocortin 4 receptor (MC4-R).
603
What phenotypic characteristics are associated with mutations in the MC4-R?
* Hyperphagia starts at ~8 months * Tendency towards being tall * Hyperinsulinemia * Increased bone mineral density.
604
Name some illnesses that can affect weight.
* Endocrinopathies * Hypothyroidism * Polycystic ovarian syndrome * Tumors of the pituitary gland, adrenal glands, or pancreas.
605
What are some drugs that promote increased appetite or slow metabolism?
* Corticosteroids * Oestrogen and progesterone (oral contraceptives) * Anticancer medications * Lithium and clozapine * Insulin and glyburide * Antidepressants (e.g., tricyclics, MAO inhibitors, SSRIs) * Antibiotics.
606
How does gut microbiota influence metabolism?
Through metabolites produced during the fermentation of dietary substances.
607
What is the estimated percentage of dieters who regain weight within two to five years after losing 10% or more of their body mass?
80-95%.
608
What is Orlistat and what does it do?
A lipase inhibitor that prevents the digestion and absorption of fats.
609
What is the recommended BMI for Orlistat usage?
≥ 30 kg/m² or ≥ 28 kg/m² with risk factors.
610
What are GLP-1 receptor agonists used for?
To increase satiety and reduce food intake.
611
What are the approved GLP-1R agonists available on NHS prescription?
* Semaglutide (Wegovy) * Liraglutide (Saxenda).
612
What is a key criterion for bariatric surgery eligibility?
BMI of 40 or more, or between 35 and 40 with another serious health condition.
613
What is the most common type of bariatric surgery?
* Gastric band * Sleeve gastrectomy * Gastric bypass.
614
What is the effect of gastric band surgery?
A band is placed around the stomach to reduce the amount of food needed to feel full.
615
What is sleeve gastrectomy?
Some of the stomach is removed, leading to reduced food intake.
616
What happens in gastric bypass surgery?
The top part of the stomach is joined to the small intestine, reducing calorie absorption.
617
What should patients regularly examine and wash?
Their feet ## Footnote Regular foot care is crucial for diabetic patients to prevent complications.
618
What should be done to areas of hard skin?
Soften with regular moisturiser
619
Should patients remove corns and calluses themselves?
No, seek help for this!
620
What is advised against wearing on feet?
Socks or tights with prominent seams
621
How should toenails be cut?
Straight across and smooth sharp edges with a file
622
What is Ejaculatory dysfunction more common than?
Erectile dysfunction
623
What impact does sexual dysfunction have on mental health?
Huge impact
624
What can complications like gastroparesis lead to?
Erectile dysfunction due to pain, vomiting, or diarrhoea
625
What is the theory behind sexual health issues in women with diabetes?
Poor glycaemic control leads to poor quality tissue in the reproductive system
626
What should be considered in type 1 diabetes regarding sexual health?
Alternative causes such as thyroid disorders
627
How many lower limb amputations due to diabetes occur weekly in the UK?
169
628
What are the recommended reassessment intervals for diabetic foot problems?
* Annually for low risk * Every 3 to 6 months for moderate risk * Every 1 to 2 months for high risk without immediate concern * Every 1 to 2 weeks for high risk with immediate concern
629
What are the three components of foot assessment?
* Patient symptoms and history * Nail care * Visual inspection
630
What is NICE IPG489 regarding?
Gastroelectrical stimulation for gastroparesis
631
What does the electrical pump for gastro stimulation consist of?
* A neurostimulator * 2 leads
632
What is the first line management for gastroparesis?
Diet control
633
What should be avoided in diet for managing gastroparesis?
Fatty foods
634
What are second line treatments for gastroparesis?
* Mirtazapine * Erythromycin * Metoclopramide * Domperidone
635
What are symptoms of gastroparesis?
* Nausea * Vomiting * Constipation or diarrhoea * Early feeling of fullness * Weight loss * Bloating * Abdominal discomfort
636
What is neuropathic pain caused by?
A lesion or disease of the somatosensory nervous system
637
What is the most common form of neuropathy in diabetes?
Peripheral neuropathy
638
What characterizes sensory neuropathy?
Tingling and/or numbness in the limbs, 'pins and needles'
639
What are the first-line treatments for painful diabetic neuropathy?
* Oral duloxetine * Amitriptyline if duloxetine is contraindicated
640
What should be considered for neuropathic pain management if no reduction in pain?
Refer to specialist pain team
641
What is the risk associated with tramadol?
Addiction
642
What cardiovascular issues can arise from autonomic neuropathy?
* Tachycardia or bradycardia * Heart failure * Orthostatic hypotension
643
What gastrointestinal issues can occur due to autonomic neuropathy?
* Oesophageal dysmotility * Gastroparesis * Diarrhoea or faecal incontinence * Constipation
644
What genitourinary issues are related to autonomic neuropathy?
* Erectile dysfunction * Retrograde ejaculation * Neurogenic bladder
645
What is a common cause of gastroparesis in diabetes?
Neuropathic damage of the vagus nerve
646
What should be checked during a visual inspection of feet?
* Suitability of footwear * Areas of poor support * Rubbing or worn areas
647
What is the pulse location for the dorsalis pedis?
On the dorsum of the foot along the lateral side of the first metatarsal shaft
648
What is the diagnosis criteria for diabetic kidney disease?
Urinary ACR of >30mg/g or Creatinine clearance <60ml/min
649
What percentage of patients with T1DM and nephropathy also suffer from retinopathy?
95%
650
What is the urinary ACR threshold for diagnosing diabetic kidney disease?
>30mg/g
651
What is the creatinine clearance threshold indicative of diabetic kidney disease?
<60ml/min
652
What percentage of patients with Type 1 Diabetes Mellitus (T1DM) and nephropathy also suffer from retinopathy?
95%
653
What are the key factors in preventing diabetic kidney disease?
* Glycaemia (HbA1c/TIR) * Blood pressure * Cholesterol
654
What is the term for the kidney damage occurring in diabetes mellitus?
Diabetic nephropathy
655
What is one major cause of nephropathy in diabetic kidney disease?
High blood glucose destroys blood vessels surrounding renal tubules/nephrons
656
What condition results in proteins leaking into Bowman’s capsule?
Albuminuria
657
What is the ideal body weight formula for men?
Constant + 0.91(Height - 152.4)
658
What is the serum creatinine constant for women when calculating creatinine clearance?
1.04
659
What is the 5-year mortality rate for patients following a diabetic foot ulcer compared to colorectal cancer?
Comparable
660
What is the annual cost of diabetic foot complications to the NHS?
£1bn to £1.2bn
661
What serum tests are part of every annual review for diabetic patients?
* Serum creatinine * ACR
662
Which medications should be used to achieve a blood pressure target of <130/80 in CKD treatment?
* ACE inhibitor * ARB * SGLT2 inhibitor
663
What percentage of participants using Tirzepatide achieved a weight reduction of 5% or more?
85% (5mg), 89% (10mg), 91% (15mg)
664
Fill in the blank: HbA1C should be checked every ______ until stable, then 6 monthly.
3-6 months
665
What is the primary first-line treatment for neuropathic pain in a diabetic patient?
Low dose amitriptyline
666
Which two tests are used to confirm renal disease screening?
* Protein:Creatinine (PCR) * Albumin:Creatinine (ACR)
667
What are the signs and symptoms of diabetes?
* Excessive thirst * Excessive urination * Weight loss * Blurred vision
668
What is the recommended initial body weight loss target for adults with type 2 diabetes who are overweight?
5% to 10%
669
True or False: Fad diets should be encouraged in diabetes management.
False
670
What is the monitoring advice for blood glucose in T2DM patients treated with insulin?
Self Monitoring of Blood Glucose (SMBG) is advised
671
What is the recommended follow-up for a patient with an HbA1C >48mmol/mol without diabetes symptoms?
Repeat HbA1C in 3 months
672
What is the significance of advanced glycation end products in diabetic kidney disease?
They cause damage to the glomerulus
673
What is the risk assessment outcome for a patient with A1C >48 and diabetes symptoms?
Diagnose T2DM
674
What is the cost of outpatient and community care for a severe diabetic foot ulcer?
Approximately £6,400
675
What should be recorded at an annual review for diabetic patients?
* Smoking status * A1C * Cholesterol * BMI * BP * ACR * SCr
676
What is the treatment aim for blood pressure management in CKD?
Aim for BP <130/80
677
Fill in the blank: If A1C <48, classify as ‘______’ risk.
high
678
What is the main clinical significance of serum creatinine?
Prognostic of kidney function
679
What HbA1c result classifies a patient as 'high risk'?
A1C < 48 ## Footnote This indicates that further action is needed for patients at risk of diabetes.
680
What is the HbA1c diagnostic threshold for Type 2 Diabetes Mellitus (T2DM)?
A1C > 48 ## Footnote This result confirms the diagnosis of T2DM.
681
List some signs and symptoms of diabetes.
* Excessive thirst * Excessive urination * Recurrent urinary tract infections * Sweet smelling urine * Superficial infections (e.g., Ringworm or Thrush) * Weight loss * Blurred vision * Confusion * Vomiting * Drowsiness * Slow healing wounds
682
True or False: A HbA1c result of 74mmol/mol indicates good long-term diabetes control.
False ## Footnote A result of 74mmol/mol signifies that long-term diabetes control is not optimal.
683
What is the recommended blood pressure target for patients with type 2 diabetes?
BP of 140/80 mmHg or less ## Footnote Achieving this target is crucial for managing diabetes-related complications.
684
What is the threshold for offering blood pressure management intervention?
> 140/90 mmHg ## Footnote This threshold indicates the need for intervention in blood pressure management.
685
What is the white-coat effect?
A discrepancy of more than 20/10 mmHg between clinic and average daytime blood pressure measurements ## Footnote This effect can lead to misdiagnosis of hypertension.
686
What percentage of the population over 65 years suffers from Peripheral Arterial Disease (PAD)?
12-20% ## Footnote Age and co-morbidities contribute to the increasing risk of PAD.
687
What is the most common risk factor for Peripheral Arterial Disease?
Smoking ## Footnote Diabetes mellitus is also a significant risk factor.
688
What are common symptoms of severe cases of Peripheral Arterial Disease?
Cramping or pain at rest, known as claudication ## Footnote This symptom indicates advanced disease.
689
What is the recommended treatment for claudication when exercise alone fails?
Naftidrofuryl 100mg TDS ## Footnote Increase up to 200mg TDS in refractory cases.
690
What are the cholesterol target levels for total cholesterol?
Less than 4mmol/L ## Footnote This target helps in managing cardiovascular risk.
691
What is the recommended starting dose of atorvastatin for primary prevention of CVD in type 2 diabetes patients?
Atorvastatin 20 mg ## Footnote This is for patients with a 10% or greater 10-year risk of developing CVD.
692
What is the NICE target for LDL reduction when on statin therapy?
40% reduction in LDL ## Footnote Achieving this target is essential for cardiovascular risk management.
693
Fill in the blank: Statins are grouped into three different intensity categories according to the percentage reduction in _______.
low density lipoprotein cholesterol
694
What is the definition of high-intensity statin therapy?
More than 40% LDL reduction ## Footnote This category includes statins that have a significant impact on lowering LDL levels.
695
What should be checked if the lipid profile target is not achieved after commencing statin therapy?
* Compliance * Possible side effects * Re-enforce lifestyle intervention advice
696
What is Metformin primarily used for?
It is used for the management of type 2 diabetes.
697
What are the common side effects of Metformin?
* Diarrhoea * Abdominal pain * Nausea
698
What is the recommended monitoring frequency for renal function and HbA1C in patients on Metformin?
Every 6 months when stable.
699
What should be done with Metformin if a patient is unwell and not eating or drinking?
Omit the dose.
700
What is Acarbose and how does it work?
It is an alpha-glucosidase inhibitor that reduces carbohydrate absorption in the gastrointestinal tract.
701
What are the advantages of Acarbose?
* No hypoglycaemia risk * Weight neutral
702
What are the disadvantages of Acarbose?
* Gastrointestinal side effects * Minimal effect on HbA1C compared to other OHAs * Impairs treatment of hypoglycaemia
703
What is the maximum dose of Acarbose?
600mg OD.
704
What are the common side effects associated with Acarbose?
* Flatulence * Bloating * Abdominal pain * Diarrhoea
705
What are the advantages of Thiazolidinediones (e.g., Pioglitazone)?
* Little to no hypoglycaemia risk * Good reduction in HbA1C * Recommended option for NASH
706
What are the disadvantages of Thiazolidinediones?
* Weight gain (fat or fluid) * Oedema * Risk of cardiovascular disease * Increased fracture risk * Risk of bladder cancer * Decreased visual acuity
707
What is the mechanism of action of Thiazolidinediones?
They stimulate PPAR gamma to increase insulin sensitivity in tissues.
708
What is the monitoring requirement for Thiazolidinediones?
Monitor liver function and heart failure symptoms.
709
What are Dipeptidyl peptidase-4 inhibitors known for?
They primarily affect blood glucose without impacting wider disease complications of T2DM.
710
What is a significant contraindication for Dipeptidyl peptidase-4 inhibitors?
History of pancreatitis.
711
What are the advantages of Dipeptidyl peptidase-4 inhibitors?
* Usually once daily dosing * Weight neutral * No hypoglycaemia risk
712
What are the common side effects of Dipeptidyl peptidase-4 inhibitors?
* Nausea * Abdominal pain * Peripheral oedema
713
What are GLP-1 Mimetics and their primary action?
They potentiate glucose-dependent insulin secretion.
714
List the available GLP-1 Mimetics and their dosing frequency.
* Liraglutide - Once daily * Exenatide - Twice daily * Dulaglutide - Once weekly * Semaglutide - Once weekly
715
What is a key advantage of GLP-1 Mimetics?
* Useful for weight loss and cardioprotection.
716
What are common side effects of GLP-1 Mimetics?
* Diarrhoea * Nausea * Vomiting
717
What is a major disadvantage of SGLT2 Inhibitors?
They can cause urinary tract infections and volume depletion.
718
Name three SGLT2 Inhibitors with significant evidence for their benefits.
* Canagliflozin * Dapagliflozin * Empagliflozin
719
What are the advantages of Meglitinides?
* Good glucose control * Less risk of prolonged hypoglycaemia * Flexibility in dosing
720
What is the mechanism of action of Meglitinides?
They augment insulin secretion from pancreatic β-cells.
721
What are the common side effects of Meglitinides?
* Diarrhoea * Abdominal pain
722
What are the advantages of Sulphonylureas?
* Well tolerated * Quick reduction in blood glucose levels * Good option for short-term steroid-associated hyperglycaemia
723
What are the disadvantages of Sulphonylureas?
* Risk of hypoglycaemia * Risk of falls in the elderly * Causes weight gain
724
What is the pharmacological action of Biguanides (Metformin)?
It sensitizes cells to insulin and reduces gluconeogenesis and glycogenolysis.
725
What are the common side effects of Biguanides (Metformin)?
* Nausea * Diarrhoea * Bloating * Abdominal discomfort
726
What are the contraindications for Biguanides (Metformin)?
* Any condition that precipitates metabolic acidosis * Renal impairment * Severe dehydration * Alcohol dependence
727
What should be monitored in patients taking Biguanides (Metformin)?
* Vitamin B12 levels * Renal function
728
What is the effect of Biguanides (Metformin) on insulin secretion?
It does not affect insulin secretion and therefore does not carry a hypoglycaemia risk.
729
What is osteoporosis?
Progressive systemic skeletal disease characterized by low bone mass and micro-architectural deterioration of bone tissue, leading to increased bone fragility and susceptibility to fracture.
730
What are the main functions of bones?
* Provide overall structure * Support and protect internal organs * Store calcium and other minerals * Allow movement in collaboration with muscles * Contain bone marrow for blood cell production
731
What are the two types of bone tissue?
* Cortical bone (thick outer shell) * Trabecular bone (strong inner honeycomb-like mesh)
732
What is the process of bone remodeling?
A renewal process where older bone tissue is broken down by osteoclasts and rebuilt by osteoblasts.
733
What are the stages of bone remodeling?
* Resting phase * Activation * Resorption * Reversal * Formation * Mineralisation
734
What happens to bone density after age 35?
The balance between bone removal and rebuilding begins to shift, leading to bone loss.
735
What does the term 'osteoporosis' literally mean?
Porous bone.
736
What are fragility fractures?
Fractures that occur due to reduced bone strength, often caused by osteoporosis.
737
What is the estimated global prevalence of osteoporosis?
Over 200 million people worldwide.
738
How many people in the UK are affected by osteoporosis?
Over 3 million people.
739
What percentage of postmenopausal women in the US and Europe have osteoporosis?
Approximately 30%.
740
Why are women more susceptible to osteoporosis?
Bone loss becomes more rapid after menopause due to a decrease in estrogen, and women generally have smaller bones and live longer.
741
What is the risk of fractures for women over the age of 50?
1 in 2 women (50%) experience fractures due to low bone strength.
742
Can osteoporosis affect men?
Yes, 1 in 5 men (20%) break a bone after age 50 due to low bone strength.
743
What is a common misconception about osteoporosis?
That it is a woman's disease, which can hinder men from seeking help.
744
What are common sites for fragility fractures?
* Wrists * Hips * Spine
745
What is kyphosis?
A forward curvature of the spine caused by weakened bones.
746
What are primary risk factors for osteoporosis?
* Age * Gender * Prior fracture history * BMI * Alcohol * Smoking * Medications
747
What are secondary causes of osteoporosis?
* Hypogonadism * Endocrine conditions * Conditions associated with malabsorption * RA * Multiple myeloma * COPD * Liver failure * CKD * Immobility
748
What is a DEXA scan used for?
To assess bone mineral density.
749
What does a T-score compare?
Bone mineral density of a patient to that of a healthy young adult of the same sex.
750
What is defined as osteopenia?
A T-score between -1 and -2.5 SD.
751
What indicates osteoporosis based on T-score?
A T-score less than -2.5.
752
What is the Q-fracture risk score used for?
To estimate an individual's risk of developing osteoporotic fractures over the next 10 years.
753
What is Q-Fracture?
An online clinical tool used as a guide to estimate an individual's risk of developing osteoporotic fractures over the next 10 years.
754
What does Q-Fracture help to identify?
People at high risk of osteoporotic fractures so they can be assessed in more detail to reduce their risk.
755
Who developed Q-Fracture?
ClinRisk Ltd and the University of Nottingham.
756
What is osteoporosis measured on?
DEXA scan.
757
What is a modifiable risk factor for osteoporosis related to body weight?
BMI < 18.5 kg/m2.
758
How does low body weight affect osteoporosis risk?
It makes osteoporosis and fractures more likely due to lower amounts of bone tissue overall.
759
What role does smoking play in osteoporosis risk?
Current smokers are more likely to break bones and tend to have lower body weight.
760
How does excessive alcohol consumption affect bone health?
It is a significant risk factor for osteoporosis and fractures.
761
True or False: Older people who are at risk of falling are less likely to have fractures.
False.
762
What are some non-modifiable risk factors for osteoporosis?
* Genetics * Age * Gender * Race * Previous fractures
763
What genetic factor increases the risk of osteoporosis?
Having a parent who had a broken hip.
764
At what age does bone loss increase significantly?
Age 75.
765
Why are women at higher risk for osteoporosis compared to men?
Women tend to live longer and experience menopause, which reduces estrogen production.
766
Which racial group is at a lower risk of osteoporosis?
Afro-Caribbean people.
767
What is one of the most obvious indicators of fragile bones?
Having previously broken bones easily.
768
Name a class of drugs that can increase the risk of osteoporosis.
Oral glucocorticoids (steroids).
769
What is the main mechanism of action of bisphosphonates?
They bind to bone minerals and cause osteoclasts to undergo apoptosis, reducing their resorptive capacity.
770
What is a key counseling point for patients taking oral bisphosphonates?
They should be taken on an empty stomach with a full glass of water.
771
List some side effects of bisphosphonates.
* Oesophageal reactions * Stomach pain * Swallowing problems (dysphagia) * Osteonecrosis of the jaw
772
What is osteonecrosis of the jaw?
A condition where the cells in the jawbone die due to reduced blood flow.
773
What is the aim of osteoporosis treatment?
To reduce bone turnover to a level associated with low risk.
774
What is denosumab?
A human monoclonal antibody used as a second-line treatment for osteoporosis.
775
What is a potential risk associated with parathyroid hormone treatments?
Risk of osteosarcoma.
776
What is the role of calcium in bone health?
Calcium is important for bone formation and strength.
777
What is the recommended time to wait before eating after taking bisphosphonates?
30 to 120 minutes.
778
Fill in the blank: Osteoporosis is a significant risk factor for _______.
fractures.
779
What is a biochemical marker of bone turnover that can be measured in serum?
N-terminal propeptide of type 1 collagen (PINP).
780
What is the maximum treatment duration for parathyroid hormone analogues?
2 years.
781
What is the role of parathyroid hormone in the body?
It regulates the amount of calcium in bone.
782
What are parathyroid hormone treatments used for?
To stimulate osteoblasts and increase bone density.
783
Why is parathyroid hormone treatment limited to a small number of people?
It is used for those with very low bone density and when other treatments are not effective.
784
What is the effect of anti-sclerostin antibody treatment?
It produced a greater increase in bone mineral density than alendronate and teriparatide.
785
What is the recommended daily amount of calcium for most healthy adults?
700mg of calcium.
786
What role does vitamin D play in calcium absorption?
It helps the body absorb calcium.
787
What is the recommended daily intake of vitamin D for all adults?
10mcg of vitamin D.
788
What are potential difficulties in obtaining enough vitamin D from food?
Vitamin D is found only in a small number of foods.
789
What is hormone replacement therapy (HRT) shown to do?
Maintain bone density and reduce the risk of fracture.
790
What is a concern regarding HRT in treating osteoporosis?
It slightly increases the risk of certain cancers, stroke, and VTE.
791
In men, when can testosterone treatment be useful?
When osteoporosis is caused by insufficient production of male sex hormones.
792
True or False: HRT is specifically recommended for treating osteoporosis.
False.
793
Fill in the blank: For osteoporosis sufferers, more _______ is needed as supplements.
calcium
794
What happened to the development of cathepsin K inhibitors?
Development was discontinued at phase 3 clinical trials due to increased risk of stroke.
795
What is the purpose of calcium and vitamin D supplements for osteoporosis sufferers?
To ensure adequate intake for bone health.
796
What is Gout?
A type of arthritis in which small crystals form inside and around the joints.
797
What are the symptoms of Gout?
* Severe pain * Swelling in joints * Hot and tender joints * Red, shiny skin over the joint * Peeling, itchy, and flaky skin as swelling goes down.
798
What is the main symptom of Gout?
A sudden attack of severe pain in one or more joints, typically the big toe.
799
How long do Gout attacks typically last?
3-10 days.
800
What causes Gout?
A disorder in purine metabolism characterized by raised uric acid levels in the blood (hyperuricemia) and deposition of urate crystals in joints and tissues.
801
What are purines?
Specific molecules made up of carbon and nitrogen atoms found in the DNA and RNA of all living things.
802
What are the two categories of purines in the human body?
* Endogenous purines: manufactured by the body * Exogenous purines: enter the body via food.
803
What is hyperuricemia?
Raised uric acid levels in the blood, often due to impaired renal excretion.
804
What are the foods high in purines that Gout sufferers should avoid?
* Offal (liver, kidneys, heart) * Game (pheasant, rabbit, venison) * Oily fish (anchovies, herring, mackerel) * Seafood (mussels, crab, shrimp) * Meat and yeast extracts (Marmite, Bovril).
805
What is recommended for a healthy diet to prevent Gout?
* Plenty of fruit and vegetables (at least 5-a-day) * Moderate amounts of meat and fish * Moderate dairy intake * Reduce or eliminate processed foods and drinks.
806
How does alcohol consumption affect Gout?
It can increase the risk of developing gout and can trigger a sudden attack.
807
True or False: Drinking wine is associated with an increased risk of developing Gout.
False.
808
What are the common joints affected by Gout?
Typically affects joints towards the ends of the limbs, such as toes, ankles, knees, and fingers.
809
What is the epidemiology of Gout in the UK?
Approximately 1 in every 100 people are affected, more common in men over 30 and women over 45.
810
What are some risk factors for developing Gout?
* Obesity * Medical conditions (CVD, diabetes, renal disease) * High-risk medicines (diuretics) * High alcohol intake * Diet high in purines.
811
What is the single most important risk factor for developing Gout?
Hyperuricemia.
812
Fill in the blank: Gout can occur in people with normal plasma uric acid levels and many people with _______ never develop Gout.
hyperuricemia.
813
What is hyperuricemia?
The single most important risk factor for developing gout ## Footnote Hyperuricemia can occur in people without gout, and many with gout can have normal uric acid levels.
814
What does sUA stand for?
Serum Uric Acid ## Footnote sUA is the most important risk factor for gout but should be considered with other clinical features.
815
What are the 4 distinct stages of gout?
* Asymptomatic gout * Acute gout * Intercritical gout * Chronic gout ## Footnote Each stage has different characteristics and implications for treatment.
816
What characterizes acute gout?
Sudden and intense pain and swelling in joints ## Footnote Damage to the joints begins during this stage.
817
How long does an acute gout attack typically last?
3-10 days ## Footnote This duration can vary among individuals.
818
What is the main method for diagnosing gout?
Clinical history and examination ## Footnote There is no single examination that confirms a diagnosis of gout.
819
What is the gold standard test for diagnosing gout?
Joint fluid test ## Footnote It checks for uric acid crystals and can rule out septic arthritis.
820
What is the reference range for serum uric acid in males over 12 years old?
200-430 µmol/L ## Footnote Reference ranges vary by age and gender.
821
What is the 5-year cumulative incidence of gout for plasma urate levels over 600 µmol/L?
305 per 1000 ## Footnote Higher plasma urate levels significantly increase the risk of developing gout.
822
What is the first-line treatment for acute gout management?
NSAIDs like Ibuprofen or Naproxen ## Footnote These should be continued for 48 hours after the attack resolves.
823
What should be considered for patients at high risk of GI bleeding when using NSAIDs?
A PPI (Proton Pump Inhibitor) ## Footnote This can help protect against gastrointestinal side effects.
824
What is the second-line treatment for acute gout?
Colchicine 500 micrograms 2-3 times per day ## Footnote Colchicine can cause side effects like profuse diarrhea.
825
What are the criteria for initiating uric acid lowering therapy (ULT) in chronic gout management?
* Multiple or troublesome flares (≥2 attacks within 1yr) * Chronic kidney disease (CKD) stages 3 to 5 * Diuretic therapy * Tophus * Chronic gouty arthritis ## Footnote If none of these apply, ULT is not indicated.
826
What is the first-line ULT medication for chronic gout?
Allopurinol ## Footnote It should be started at least 1-2 weeks post the last attack.
827
What is the maximum dose of Allopurinol recommended per day?
900 mg ## Footnote This is the maximum tolerated dose for lowering uric acid levels.
828
What should be monitored when prescribing Allopurinol?
Serum urate levels ## Footnote Levels should be checked 4 weeks after initiation and adjusted accordingly.
829
When should Febuxostat be considered in chronic gout management?
If Allopurinol is contraindicated, not tolerated, or ineffective ## Footnote Febuxostat should be started at least 1-2 weeks post the last attack.
830
What is the starting dose of Febuxostat?
80 mg once daily ## Footnote Starting with a lower dose may reduce the incidence of acute flares.
831
What is a potential interaction of Allopurinol?
It potentiates the anticoagulant effect of warfarin ## Footnote Monitoring is necessary during dose titration.
832
True or False: X-rays are commonly used to diagnose gout.
False ## Footnote X-rays rarely detect urate crystals but may help rule out similar conditions.
833
What is the role of ultrasound in gout diagnosis?
To detect crystals in the joints and deep in the skin ## Footnote It is a simple and safe method increasingly used in practice.
834
What can decrease the incidence of acute flares?
May decrease the incidence of acute flares.
835
What should be done if sUA is >360 μmol/l after 4 weeks?
The dose can be increased by 40mg & sUA rechecked in a further 4 weeks.
836
What is the maximum dose of febuxostat?
Max dose = 120 mg daily.
837
What should be co-prescribed to prevent an acute gout flare?
Prophylactic colchicine (500 mcg b.d. for up to 6 months) or NSAID (ibuprofen 200mg b.d. or naproxen 250mg daily for up to 6 weeks).
838
What should be done if hypersensitivity occurs with febuxostat?
Stop febuxostat immediately, do not restart.
839
With which medications should febuxostat be avoided?
Azathioprine and mercaptopurine.
840
When should febuxostat not be started?
During an acute attack; ensure at least 1-2 weeks have passed before initiation.
841
What should be done if an attack develops while on febuxostat?
Continue treatment and treat the attack separately.
842
Should patients already stabilized on ULT interrupt therapy during a gout flare?
DO NOT interrupt uric acid lowering therapy unless there is a clinical reason.
843
What is NOT a clinical reason to interrupt uric acid lowering therapy?
Gout flare is NOT a clinical reason.
844
When should a patient be referred to Secondary Care immediately?
If septic arthritis is suspected.
845
What are routine reasons to refer a patient to Secondary Care?
* sUA is unresponsive to uric acid lowering therapy * Gout persists despite uric acid levels <360 μmol/l * Patient suffers complications relating to gout * Patient requires intra-articular therapy and primary care are not able to provide * There is diagnostic uncertainty.
846
What complications are associated with gout?
* Tophi may create problems with activities of daily living * Hyperuricaemia-induced renal disease * Urinary stones found in 10–25% of people with gout.
847
What is the correlation of urinary stones with plasma urate levels?
The incidence of urinary stones is strongly correlated with plasma urate level.
848
What can happen at plasma urate levels higher than 780 micromol/L?
The incidence of urinary stones increases by up to 50%.