Endocrinology Flashcards

(61 cards)

1
Q

Tx Hyperthyroidism in primary care

A

Beta blockers for symptomatic relief

e.g. propanolol 20-40mg t.d.s. for rapid relief

Referral to specialist endocrinologist

Potentially commencement of carbizamole

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2
Q

Tx of hyperthyroidism in secondary care

A

if graves - Antithyroid drug (TPO inhibitor)
1st line - carbimazole
2nd line - propylthiouracil

Radioactive iodine if a non-graves pathology is first line (2nd line in graves)

surgery indicated if:
medical failure
?malignancy
large toxic goitre

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3
Q

side effects of antithyroid drugs

A

Rashes

Agranulocytosis/thrombocytopenia - WBC/FBC should be immediately performed if there is suspicion of an active infection

Carbizamole may lead to cholestatic jaundice

propylthiouracil may cause acute liver impairment (1 in 10,000)

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4
Q

what isotope is used for radioactive iodine

A

131-I

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5
Q

what are principles of management for radioactive iodine

A

you must discontinue antithyroid drugs 1 week before treatment

Patients should avoid close contact with children 3 weeks after treatment and should not attempt to concieve within 6 months of treatment

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6
Q

contraindications for radioactive iodine therapy

A

pregnancy

active graves opthalmopathology

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7
Q

post operative complications of thyroidectomy

A

Haematoma formation causing asphyxia
Emergency removal of sutures required

Hypothyroidism (10%)

Hypocalcaemia – due to hypoparathyroidism

Vocal cord paresis due to recurrent laryngeal nerve damage

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8
Q

Tx of hypothyroidism

A

Levothyroxine

Start low and titrate up

Recheck TFTs every 4-6 weeks until TSH is in the lower half of the normal reference range - only if primary condition, TSH is unreliable for secondary conditions, and T4 should therefore be used

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9
Q

Tx of thyroiditis

A

Treatment is with propanolol in the thyrotoxic phase, with simple analgesia

Occasionally 30mg prednisolone is used

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10
Q

investigation and management of a solitary thyroid nodule

A

History and Examination

USS

Technetium scans
Hot = adenoma
Cold = malignancy

FNAC

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11
Q

Tx of hypocalcaemia

A

Mild/moderate
Adcal – vitD + calcium

Severe 
Calcium gluconate (stabilise myocardium) 
10ml 10% solution  
Start AdCal 
Find and treat cause
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12
Q

Tx of prolactin secreting adenoma

A

Dopamine agonists
Ropinarole/bromocriptine

Treatment usually shrinks the tumour down reducing the mass effects without the surgical risks

Symptoms usually recur when stopping drugs

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13
Q

side effects of dopamine agonists

A

N+V

Dizziness

Syncope

Associated with pulmonary, cardiac and retroperitoneal fibrosis

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14
Q

monitoring in dopamine agonist therapy

A

regular CXR/Echo

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15
Q

Tx for acromegaly

A

Somatostatin analogues may be used to shrink the tumour

Long term if surgical removal isnt possible

Surgical management is via transphenoidal approach

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16
Q

Tx of confirmed pituitary adenoma causing cushings

A

Surgical management is via transphenoidal approach

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17
Q

Tx of Addisons

A

Long term replacement for glucocorticoids
15-25mg hydrocortisone daily in 3 divided doses
Avoid giving late in day as can cause insomnia

Long term mineralocorticoid cover
Required if there is electrolyte disturbance or postural hypotension
Fludrocortisone 50-200mcg daily

Steroids should never be abruptly stopped
Extra doses required for exercise
Double dose for febrile illness, surgery or trauma

Patients should carry a card/bracelet on them at all times and carry emergency IM hydrocortisone in case of an Addisonian crisis

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18
Q

Tx of an addisonian crisis

A

IV fluids

IV hydrocortisone

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19
Q

Tx of congenital adrenal hyperplasia

A

as per addisons:

Long term replacement for glucocorticoids
15-25mg hydrocortisone daily in 3 divided doses
Avoid giving late in day as can cause insomnia

Long term mineralocorticoid cover
Required if there is electrolyte disturbance or postural hypotension
Fludrocortisone 50-200mcg daily

Steroids should never be abruptly stopped
Extra doses required for exercise
Double dose for febrile illness, surgery or trauma

Patients should carry a card/bracelet on them at all times and carry emergency IM hydrocortisone in case of an Addisonian crisis

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20
Q

Tx of conns syndrome

A

Unilateral adenoma
Laporoscopic adrenalectomy to remove the adenoma

Spironolactone pre-op to control hypertension/hypokalaemia

Bilateral

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21
Q

Tx of primary hyperparathyroidism

A

Parathyroidectomy

Indicated even in asymptomatic cases due to potential long term adverse effects

Serum calcium should be normal 24 hours post surgery

May even be post operative hypocalcaemia

Treated with adcal 14 days

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22
Q

Tx of secondary hyperparathyroidism

A
treat underlying cause of hypocalcaemia
(Vitamin d deficiency  
Acute pancreatitis 
Alkalosis 
Acute hyperphosphataemia)
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23
Q

Tx of tertiary hyperparathyroidism

A

Parathyroidectomy

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24
Q

Tx of acutely raised calcium

A

IV fluids
0.9 NaCl to increase calcium clearance
Aim for 3-6L over the first 24 hours

Single dose of pamidronate (bisphosphonate)
Lowers calcium over 2-3 days

consider calcitonin if life threatening

dialysis is last resort

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25
what is part of the annual diabetic review
``` Cardiovascular risk review Smoking? BMI BP ECG Blood lipids ``` ``` Assess for microvascular complications Eye check Feet Pain? Erectile dysfunction ? Neurovascular status Urine dip ``` ``` Assess diabetic control HBA1C Assess concordance to diet/lifestyle advice Assess for lifestyle events Hospitalisation Symptoms of hypoglycaemic episodes Medication side effects Injection site reactions ``` DrivinG? DVLA require informing? Depression/anxiety screen
26
what cardiological monitoring and protection is done for diabetic patients
Control blood pressure <140/80 <130/80 if there are any microvascular complications QRISK - Atorvostatin if >10% 10 year risk
27
Lifestyle advice for Diabetes (mainly T2DM)
Dietary advice General, stick to what is generally considered healthy Weight loss 5-10% aim Increase physical activity 30 min per day (low-medium intensity) Smoking cessation Alcohol advice Alcohol may exacerbate/prolong effects of hypoglycaemia and may make hypoglycaemic episodes unclear Limit intake and always have carbohydrates at the ready if alcohol is being consumed
28
Medical therapy for T2DM
1st line – metformin 500mg with breakfast 1st week, then with breakfast and dinner the next week, then after each of the 3 meals thereafter Alternative if contraindicated Gliptin (DPP4is) Thiazolidinedione/pioglitozone (PPARy activators) Sulphonylurea 2nd line Metformin + any of drugs mentioned above (Sulphonurea tends to be used more commonly) 3rd line Triple therapy Metformin + SU + gliptin/pioglitozone 4th line Insulin
29
Tx for T1DM
Insulin therapy Basal bolus regime with long-acting insulin with mealtime short-acting insulin adjustments tends to be the best regime
30
what considerations should there be for poor control in T1DM
Non-adherence Poor technique Non rotation of injection sites Innapropriate dose titration Psychosocial issues Organic causes
31
complications of insulin therapy
General Weight gain Insulin resistance ``` Local (injection site) Pain Redness Swelling Injection site abscess Lipohypertrophy ```
32
what are the glucose monitoring targets for diabetes
4x daily glucose monitoring at least 2x a week is the mimimum requirement Optimal targets are : Fasting glucose level of 5-7 on waking Plasma glucose level 4-7 before meals at any other time of the day Plasma glucose 5-9 90 mins after eating
33
what are the sick day rules for diabetes
Do not stop the insuin therapy Monitor blood glucose every 3-4 hours including overnight Consider checking blood/urine for ketones Maintain normal meal pattern where possible Drink at least 3L of fluid everyday Go to GP/hospital if there are serious indications of illness (can't drink fluid due to N+V, ketones in urine/blood, dangerously elevated glucose levels etc)
34
what are the DVLA rules around diabetes
DVLA should be notified if: 2 episodes of severe hypoglycaemia in the last 12 months Reduced awareness of hypoglycaemic episodes Insulin therapy Must check BG every 2 hours of a long journey Must carry enough supplies to avert hypoglycaemic events
35
how do biguianides like metformin work
Decreased hepatic glucose production and increased peripheral insulin sensitivity
36
contraindications for metformin
EGFR <30ml/min/1.73m2 (standard release) or 45 for modified release Alcohol addiction People at risk of lactic acidosis (DKA) People at risk of tissue hypoxia Cardiorespiratory failure
37
side effects of metformin
GI effects N+V Abdo pain Anorexia Lactic acidosis Rare but serious Caused by drug accumulation More common when combined with alcohol
38
examples of sulphonylureas
tolbutamide (short acting) gliclazide (medium acting) glibenclamide (long acting)
39
mechanism of action for sulphonylureas
increases insulin secretion
40
what diabetic drugs increase risk for hypoglycaemia + what does this mean
Insulin SUs + metglinides caution prescribing in elderly due to increased risk of hypoglycaemic events
41
what diabetic drugs cause weight gain
insulin SUs Thiazolidinediones (PPAR-y activators)
42
mechanism of action of Thiazolidinediones
PPAR-y activators increasing peripheral insulin sensitivtiy
43
mechanism of action of Gliptins
increase post-prandial insulin release via DPP4 inhibition
44
when are gliptins contraindicated
cardio/hepatic/renal dysfunction
45
side effects of gliptins
GI disturbance rarely Acute pancreatitis
46
example of a GLP1 agonist
enaxatide
47
what is the only real indication for enaxatide therapy in T2DM
Rarely used, only indication is replacing the pioglitazone/gliptins in triple therapy IF the patient: Has a BMI >35 or Has a BMI <35 AND Weight loss would be beneficial, Insulin therapy would have negative occupational impacts
48
side effects of enaxatide
GI disturbance Rarely acute pancreatitis
49
side effects of Thiazolidinediones
Weight gain – redistibutes ectopically stored lipids Fluid retention – avoid in CCF Liver dysfunction – monitor LFTs Linked to bladder cancer – assess risk factors
50
how can you identify an exogenous insulin overdose
high insulin levels but low C-peptide levels c-peptide is produced with endogenous insulin but not in exogenous insulin
51
urgent DKA Tx
A to E 1L 0.9% sodium chloride over 1 hour if SBP >90 500ml bolus over 10 mins if SBP <90, reassess and repeat if poor response Start IV infusion of insulin 50 units human soluble rapid acting insulin added to 60ml 0.9% NaCl giving 1 unit/ml solution Start in syringe driver at 0.1units/hour
52
when should you consider a crit care review in DKA
Severe DKA (pH <7.1) Drowsy Pregnant Sats <94% on 40% O2 Persistent hypotension (<90SBP) after 2L of NaCl
53
post-acute Tx for DKA
Continue fixed rate insulin at 0.1units/kg/hour and continue normal long acting insulin Aim for blood glucose to fall 3mmol/L/hour until <14mmol/L If glucose not falling check dosage, pump operation, patient weight, reassess concominant illness Increase rate by 1 unit/hour if necessary ``` Continue IV 0.9% NaCl 1L over 1 hour Then 1L over 2 hours 3rd bag = 1L over 2 hours 4th bag = 1L over 3 hours ``` When glucose is <14mmol/L add 10% glucose at 125ml per hour Adjust to keep blood glucose between 8-14mmol/L Potassium If potassium <5.4 add 40mmol KCL per litre NaCl Consider after first liter either way Reassess hourly for the first 4-6 hours Regular lab monitoring of glucose, ketones, potassium and bicarbonate
54
post recovery protocols for DKA
Transfer to SC insulin once the patient is able to eat and drink normally, and venous pH is >7.3 Stop the IV infusion 1 hour after the next SC injection of insulin Refer all patients to the diabetes team prior to discharge
55
Tx for HHS
Aggressive IV fluids 1L 0.9% NaCl over one hour Aim for positive balance of 3-6L over 12 hours There may be an initial rise in Na this is not concerning if osmolality is declining Low dose fixed dose IV insulin infusion Ketones = treat as DKA and treat immediately No ketones = add insulin once fall in glucose is <5mmol/L hr 0.05 units/kg/hour, may not be required Consider potassium replacement 3.5-5.5, add 40mmol/L if >5.5, seek senior help Give prophylactic LMWH Very high risk of thrombosis Regular monitoring of vitals, fluid balance, glucose, osmolality, U+E hourly for the first 6 hours Complete normalisation of fluid/electrolytes may take 72 hours Transfer to SC insulin when eating and drinking and normally and biochemistry has normalised Stop the IV infusion 1 hour after starting SC insulin Refer to diabetes team
56
Tx for hypoglycaemia in the patient able to swallow
Promptly consume 10-20g fast acting carbohydrate preferable in liquid form Avoid chocolates/biscuits as sugar content lower, and fats may delay stomach emptying Recheck blood glucose levels after 10-15 mins Hypoglycaemia should be reversed in about 10 mins Improvements in signs and symptoms may lag behind improvement in blood glucose If inadequate response repeat as above and recheck again When symptoms improve, the patient should eat some long-acting carbohydrate
57
out of hospital Tx for hypoglycaemic if patient is unconcious/unable to swallow
if available Administer IM glucagon immediately <8yrs 500mcg >8yrs 1mg Glucagon not available, alcohol has been consumed, or patient does not respond to glucagon within 10 mins call 999 for emergency hospital transfer as Glucagon doesn't work is alcohol has been consumed If the patient responds to glucagon, advise intake of long acting carbohydrates when able Vomiting is common during recovery which can precipitate further episodes of hypoglycaemia If episodes recur the patient may require hospital admission for IV treatment
58
hospital Tx for hypoglycaemia if patient unconcious/unable to swallow
Within hospital 100ml 20% glucose can be used as an alternative to glucagon and this can be repeated 3 times If IV access is not available, administer IM glucagon whilst gaining access (<8yrs 500mcg, >8yrs 1mg) Following recovery never omit insulin In patients with T1DM
59
Tx for proliferative diabetic retinopathy
Pan-retinal photocoagulation Aim is to burn off the new developing vessels Vitrectomy if there is persistent haemorrhage
60
Tx for diabetic maculopathy
Focal laser treatment Mixed maculopathies require more complex treatments
61
Tx of diabetic renal disease
any diabetic patient with microalbuminurea should be started on an ACE inhibitor regardless of symptoms