Paediatrics 1 Flashcards

1
Q

What is pneumonia?

A

an acute lower respiratory tract infection resulting in inflammation of the lung tissue and sputum filling the airways and alveoli

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2
Q

What are the 3 most likely bacterial causes of pneumonia in neonates?

A

organisms from the maternal genital tract e.g.
- group B streptococcus
- bacilli
- gram -ve enterococci

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3
Q

What are the 3 most common causes of pneumonia in children older than 5?

A

strep pneumoniae
mycoplasma
chlamydia

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4
Q

What is the overall most likely cause of bacterial pneumonia?

A

strep pneumoniae

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5
Q

What are the key symptoms of pneumonia? x4

A

fever
cough
chest pain
lethargy

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6
Q

What are the key signs of pneumonia in children ? x5

A

tachypnoea
nasal flaring and recession
decreased breath sounds
bronchial breathing
focal course crackles on auscultation

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7
Q

How is pneumonia diagnosed in children?

A

usually clinical
CXR
sputum sample

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8
Q

What is the 1st line treatment for bacterial pneumonia in children?

A

amoxicillin

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9
Q

What is the treatment for mycoplasma or chlamydia pneumonia?

A

macrolide antibiotics e.g. erythromycin

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10
Q

What is croup?

A

Infection of the upper airway seen in infants and toddler, known as laryngotracheobronchitis

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11
Q

What is the most common cause of croup?

A

Parainfluenza viruses

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12
Q

What are the key symptoms of croup? x4

A

Inspiratory stridor and hoarseness (due to inflammation of the vocal cords)
Barking cough (worse at night) (due to tracheal oedema and collapse)
High fever
Cold symptoms

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13
Q

What is Hoover’s sign?

A

When the chest wall recesses in croup

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14
Q

How is croup differentiated from epiglottitis?

A

similar presentations but epiglottitis is much more rapid onset of acute illness, with very high temperature, no cough, drooling and soft, whispering stridor

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15
Q

What is the management for croup? (mild vs moderate/severe)

A

Mild - give oral dexamethasone (0/15mg/kg) and symptoms usually resolve within 28 hours

Moderate/severe - admit to hospital and give O2 + nebulised adrenaline

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16
Q

What are the signs of severe croup? x5

A

frequent cough
stridor is prominent at rest (mild disease has no cough at rest)
marked sternal recession (hoover’s)
significant distress and agitation
lethargy and restlessness

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17
Q

What is acute epiglottitis?

A

Inflammation of the epiglottis and surrounding tissues associated with septicaemia
It is a life-threatening emergency due to the high risk of respiratory obstruction

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18
Q

What causes acute epiglottitis?

A

haemophilus influenzae type b (Hib)

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19
Q

In what age group is acute epiglottitis most commonly seen?

A

children aged 1-6

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20
Q

What are the key symptoms of acute epiglottitis? x3

A

High fever in a very ill, toxic-looking child
Intensely painful throat which prevents the child from speaking or swallowing - saliva drools down from the chin
Soft inspiratory stridor

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21
Q

What are the key signs of acute epiglottitis? (specific position)

A

Rapidly increasing respiratory difficulty over hours
Child sitting upright and immobile with an open mouth to optimise the airway (tripoding)

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22
Q

How is acute epiglottitis diagnosed?

A

usually symptom-based diagnosis plus throat examination

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23
Q

how is acute epiglottitis managed?

A

Urgent hospital admission and treatment is needed
Secure airway with tube + fluids + antibiotics (e.g. cefuroxime) + give oxygen
Rifampicin is given prophylactically to other household occupants/close contacts

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24
Q

What is tripod position in relation to acute epiglottitis?

A

a sign of respiratory distress characterised by the child leaning forward, mouth open and tongue out

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25
What is the difference between wheeze and stridor?
wheeze is an polyphonic (more than one sound) noise heard on expiration stridor is an monophonic high-pitched inspiratory noise
26
What pathology is characteristic of asthma?
reversible airway obstruction airway hyperresponsiveness inflamed bronchioles mucus hypersecretion
27
When are symptoms usually worse in asthmatics?
at night and early in the morning due to narrowing of the airways during sleep as a result of changing hormone levels (e.g. cortisol, epinephrine + melatonin)
28
What are the treatments for acute asthma? (moderate, acute severe/life-threatening)
moderate - give salbutamol acute severe/life-threatening - requires hospital admission, 1st line: salbutamol nebulised with O2 + oral prednisolone, 2nd line: IV salbutamol and aminophylline
29
What is the management for chronic asthma in children aged 5-16?
start with SABA for symptoms relief step wise approach if symptoms >3 times per week 1: SABA + low does ICS 2: SABA + low dose ICS leukotriene receptor antagonist 3: SABA + paediatric low-dose ICS + LABA specialist care referral if still not improving
30
What are the features of a moderate acute asthma attack? x5
SpO2 >92% PEF >33% HR <140bpm RR <40/min Able to talk
31
What are the features of an acute severe asthma attack? x6
SpO2 <92% PEF <33-50% predicted HR >140 bpm (1-5 yrs) HR >125 bpm (5+ years) RR >40/min (1-5 yrs) RR >30/min (5+ yrs) Can't complete sentences in 1 breath Use of accessory neck muscles
32
What are the features of a life-threatening asthma attack? x6
SpO2 <92% with one of: PEF <33% Cyanosis Confusion Silent chest Hypotension
33
What pCO2 value indicates a life-threatening asthma attack?
a normal pCO2 of 4.8-6 kPa this indicates reduced respiratory effort in asthma because initially there is compensation and hyperventilation causing the pCO2 to decrease but when further air trapping leads to decreased lung compliance and increased work of breathing, the pCO2 will begin to increase.
34
What is virally induced wheeze?
episodic wheeze resulting from small airways being more susceptible to narrowing and obstruction due to inflammation and aberrant immune responses to viral infection
35
What are the risk factors for virally induced wheeze?
maternal smoking during +/or after pregnancy premature birth FH of early wheezing males increased viral exposure during childhood
36
What are the key symptoms of virally induced wheeze? x6
URTI symptoms - cough, coryza, blocked/runny nose, sneezing, sore throat fever lethargy and fatigue poor feeding wheezing sound difficulty breathing/chest tightness
37
what are the signs of virally induced wheeze? x6
tachypnoea hypoxia wheezing prolonged expiratory phase reduced air entry accessory muscle use/retractions
38
What are the some of the most common differentials for virally induced wheeze? x3
asthma anaphylaxis foreign body aspiration
39
How is virally induced wheeze treated?
same as acute asthma treatment - severity dependent
40
What is bronchiolitis?
Lower respiratory tract infection which leads to the blockage of small airways in the lungs
41
What are some of the causes of bronchiolitis? x 2 main +others
Respiratory syncytial virus is the most common cause Rhinovirus (2nd most common cause) Other causes: adenovirus, parainfluenza virus, influenza virus and human metapneumovirus Coinfection with more than one virus can lead to a more severe illness
42
What are 3 risk factors for bronchiolitis?
premature birth bronchopulmonary dysplasia underlying disease e.g. CF
43
What are the key symptoms of bronchiolitis? x3
dry wheezy cough poor feeding increasing breathlessness (serious complication = recurrent apnoea)
44
What are the signs of bronchiolitis? x5
Tachypnoea and tachycardia Subcostal and intercostal recession Hyperinflation of the chest Fine end-inspiratory crackles High pitched wheezes - expiratory > inspiratory
45
What features in bronchiolitis require immediate hospital assessment?
apnoea serious unwell-looking child severe respiratory distress e.g. grunting, marked chest recession, or a resp rate over 70 breaths/minute central cyanosis persistent O2 saturation <92% when breathing air
46
What is the management for bronchiolitis?
supportive humidified O2 via nasal cannulae/head box apnoea monitoring IV fluids if needed
47
What is cystic fibrosis?
an inherited autosomal recessive condition affecting mucus glands due to delta F508 mutation in the CFTR gene on chromosome 7
48
What is the pathophysiology in CF?
- the defective CFTR gene codes for cyclic AMP-dependent chloride channels - the mutation causes poor chloride secretion across the epithelium leading to production of very thick, sticky mucus which clogs airways/tracts resulting in multiple system involvement
49
What is the key symptom/complication of CF in neonates?
meconium ileus (bowel obstruction which occurs when the first faeces are even thicker and stickier than normal meconium)
50
What are the key symptoms of CF in infants? x4
→ failure to thrive + steatorrhoea (fatty faeces) → short stature → recurrent chest infections due to S/ aureus + pseudomonas aeruginosa → prolonged neonatal jaundice
51
What are the main pathogens which can cause lung infections in CF patients? x3
s. aureus h. influenzae pseudomonas aeruginosa
52
What are the key symptoms of CF in young children? x4
→ bronchiectasis → rectal prolapse → nasal polyp → sinusitis
53
How is CF usually diagnosed in children?
usually detected during new-born screening programmes sweat test (measures Cl- in sweat which is elevated in CF)
54
What is the management for CF in children?
interdisciplinary approach to manage symptoms as no definitive cure Respiratory: TWICE DAILY chest physio, multiple courses of antibiotics for recurrent infections GI: pancreatic enzyme replacement, liver transplant and high calorie/fat diet orkambi
55
What is the new treatment for CF and how do the 2 types work?
Orkambi which can be used in patients who are homozygous with the delta F508 mutation Lumacaftor --> increases the number of CFTR proteins which are transported to the cell surface Ivacaftor --> potentiates opening of the CFTR channel at surface to promote less viscous mucus
56
What is acute otitis media?
inflammation of the middle ear of fewer than 3 weeks duration and is usually secondary to a bacterial infection spreading from the upper respiratory tract via the eustachian tube
57
What are some of the risk factors for acute otitis media? x8
young age (peak incidence is in the 1st year of life) male daycare or nursery attendance lack of breast feeding exposure to tobacco smoke and air pollution congenital craniofacial abnormalities including trisomy 21 and cleft palate immunocompromised children
58
What are the key symptoms of acute otitis media? x6
recent onset ear pain - can present as ear pulling or irritability in nonverbal children fever anorexia/poor feeding vomiting/diarrhoea lethargy aural fullness
59
What are the otoscopy findings in acute otitis media?
Red, bulging and tender tympanic membrane Mucopurulent discharge in acute suppurative otitis media
60
What is the management for acute otitis media?
AOM is self-limiting usually lasting 3-7 days and often doesn't require treatment In children who are unwell or at high risk of complications immediate antibiotics (1st line amoxicillin, 2nd line co-amoxiclav) and consideration of hospital admission is needed
61
What are some of the potential complications of AOM? x7
acute mastoiditis sensorineural + conductive hearing loss cholesteatoma facial nerve palsy bacterial meningitis neck and intracranial abscesses sigmoid sinus thrombosis
62
What is acute mastoiditis?
a rare complication of AOM where continued inflammation of the mucosa of the middle ear leads to a mastoid abscess
63
What are the key symptoms of acute mastoiditis?
mastoid pain and tenderness fluctuant erythematous retro-auricular swelling auricle proptosis (abnormal protrusion of the pinna)
64
What is glue ear?
also known as otitis media with effusion (OTE), when the middle ear becomes full of fluid, causing hearing loss in that ear
65
What is seen on otoscopy in glue ear/OTE?
dull tympanic membrane with air bubbles or a visible fluid level, although it can look normal
66
What are grommets?
tiny tubes inserted into the tympanic membrane which allow fluid from the middle ear to drain through the tympanic membrane to the ear canal
67
What is the function of grommets?
to keep the middle ear aerated and prevent the accumulation of fluid in the middle ear
68
How long do grommets usually last?
grommets usually fall out within a year following insertion only 1/3 of patients require further grommets to be inserted for persistent glue ear
69
What are the indications for grommets? x3
recurrent AOM chronic otitis media + effusion eustachian tube dysfunction
70
What is sensorineural hearing loss?
deafness caused by damage to the inner ear cochlear and 8th cranial nerve usually present at birth
71
How is sensorineural hearing loss treated? x2
hearing aids cochlear implants
72
What is conductive hearing loss?
deafness caused by impediment of the sound waves travelling from the outer ear/ear drum or across the ear ossicles most often result of otitis media with effusion
73
What are the management options for conductive hearing loss? x4
grommets bone conduction hearing aids surgical bone anchored hearing aid middle ear implants
74
What are some causes of conductive hearing loss?
1. Glue ear 2. Ear wax 3. Otitis media 4. Perforated ear drum
75
What is squint/strabismus?
any misalignment of the eyes resulting in the retinal image being in non-corresponding areas of both eyes
76
What is are the 2 main types of squint and what causes them?
concomitant (non-paralytic) squints are usually congenital and due to differences in the control of the extra-ocular muscles - severity varies inconmitant (paralytic) squint is usually acquired through damage to the extraocular muscles of their nerves (much rarer)
77
What are the key presentations of concomitant squints in children?
intermittent closure of one eye reduction of motor skills (in amblyonic children) compensatory head tilt/chin lift refractive error media opacities like cataracts retinal abnormalities e.g. retinoblastoma
78
What are the key presentations of paralytic squint?
diplopia other presentations very depending on cause
79
What are the 3 screening tests needed to detect strabismus?
gross inspection light reflex tests, including the bruckner test (inspection for a red reflex) cover tests
80
What is the management for strabismus?
dependent on cause - correction of refractive errors - eye patching/cycloplegic drops - prisms on glasses lens - surgical alignment - eye exercises - miotic agents - chemodenervation
81
What is the most common congenital heart defect?
Ventricular septal defect
82
What causes symptomatic presentation in VSD?
Most patients with VSD experience symptoms primarily because of the increased flow of blood through the pulmonary circulation. Since the pressure in the left ventricle is greater than in the right ventricle, the majority of VSDs will be shunting left to right
83
What are the features of the acyanotic septal cardiac defects?
- left to right shunting, mixing of oxygenated blood with deoxygenated blood - increased pulmonary blood flow --> risk of pulmonary hypertension and untreated acyanotic heart disease can lead to Eisenmenger syndrome - lesions that are above the level of the nipple usually give rise to ejection systolic murmurs while lesions below the level of the nipple typically cause pan systolic murmurs
84
What are the haemodynamic consequences of VSD according to size?
Very small VSD - minimal flow of blood --> no significant increase in pulmonary blood flow, mostly asymptomatic Moderate-sized VSD - flow of blood through the VSD is great enough to cause a significant increase in blood flow through the pulmonary circulation resulting in the left side of the heart receiving a greater volume of blood → dilatation of the L atrium and ventricle Large VSDs - significant amount of blood flow through VSD → early heart failure and severe pulmonary hypertension, symptoms of cardiac failure are evident after the 1st weeks of life
85
What are the risk factors for VSD? x6
Maternal diabetes mellitus Maternal rubella infection Alcohol (FAS) Family history of VSD Congenital conditions such as Down’s syndrome, trisomy 18 syndrome, Holt-Oram syndrome Some medications (weak evidence)
86
What are the key symptoms of the different sizes of VSD?
Small VSD = mild-no symptoms, systolic murmur is sometimes detected Moderate VSD - excessive sweating, easily fatigable, tachypnoea, Large VSD - similar symptoms to CHF: SOB, difficulty feeding, developmental issues, frequent chest infections
87
What are the differentials for VSD? x6
Mitral regurgitation Tricuspid regurgitation Atrial septal defect Patent ductus arteriosus Pulmonary stenosis Tetralogy of Fallot
88
What is the management for VSD?
Small does not require treatment Medical management - increased caloric intake, diuretics, ACE inhibitors, Digoxin Surgical - medium to large defects causing significant symptoms may need surgery to close the defect - procedures include: Surgical repair (open heart surgery under cardiopulmonary bypass) Catheter procedure (uses a mesh device to close the hole) Hybrid approach (small access through left ventricle for mesh closing device)
89
What is Eisenmenger's syndrome?
where the pressure in R ventricle exceeds that of the L ventricle as a result of a significant gradual increase in the pulmonary vascular resistance → shunt reversal which causes decreased systemic O2 sats and cyanosis
90
What is the most common type of atrial septal defect?
patent foramen ovale
91
What are the risk factors for ASD? x6
Autosomal dominant inheritance Family history of ASD Maternal smoking in 1st trimester Maternal diabetes Maternal rubella Maternal drug use (e.g. cocaine + alcohol)
92
What are the signs of a large ASD? x3
Tachypnoea Poor weight gain Recurrent chest infections
93
What are the signs of ASD on auscultation? x3
Soft ejection systolic murmur, best heard over pulmonary valve region Wide, fixed split S2 Diastolic rumble in lower left sternal edge in pts with large ASD
94
What is the management for ASD?
If ASD <5mm, spontaneous closure should occur within 12 months of birth Diuretics may be needed in children with heart failure Surgical closure is the definitive management usually in patients with ASD>1cm - Can be carried out percutaneously or open chest using cardiopulmonary bypass
95
What is the gold standard investigation for septal defects
transthoracic echocardiogram
96
What is the definition of heart failure?
A syndrome characterised by either or both pulmonary and systemic venous congestion and/or inadequate peripheral oxygen delivery, at rest or during stress, caused by cardiac dysfunction
97
What are the causes of heart failure in neonates? x3
Primarily caused by obstructed systemic circulation: Hypoplastic left heart syndrome (left heart never fully developed) Critical aortic valve stenosis Severe coarctation of the aorta (severe narrowing) Interruption of the aortic arch
98
What are the causes of heart failure in infants? x3
usually result of high pulmonary blood flow: Ventricular septal defect Atrioventricular septal defect Large persistent ductus arteriosus
99
What are the causes of heart failure in older children/adolescents? x3
Eisenmenger syndrome (RHF only) Rheumatic heart disease Cardiomyopathy
100
What are the key symptoms of heart failure? x4
Breathlessness sweating Poor feeding Recurrent chest infections
101
What are some signs of heart failure? x7
Poor weight gain and faltering growth Tachypnoea Tachycardia Heart murmur, gallop rhythm Enlarged heart Hepatomegaly Cool peripheries
102
What are the investigations for heart failure?
1st line: CXR, ECG GS: Cardiac MRI Blood biomarkers e.g. BNP
103
What are the 6T's for the differential diagnoses of cyanotic lesiosn?
Tetralogy of Fallot Transposition of great arteries Truncus arteriosus Total anomalous pulmonary venous connection Tricuspid valve abnormalities Ton of others - hypoplastic left heart, double outlet right ventricle, pulmonary atresia
104
What is the nitrogen washout/hyperoxia test?
test used to differentiate cardiac from non-cardiac causes of cyanosis when an infant is given 100% oxygen for 10 mins after which an ABG is taken a pO2 of less than 15kPa indicates cyanotic congenital heart disease
105
What is the initial management for suspected cyanotic congenital heart disease?
supportive care prostaglandin E1 e.g. alprostadil (used to maintain a patent ductus arteriosus)
106
What are the characteristic defects in Tetralogy of Fallot?
Ventricular septal defect Pulmonary stenosis Overriding aorta Right ventricular hypertrophy
107
What are 4 conditions associated with TOF?
Down’s syndrome (40% have form of CHD) DiGeorge syndrome CHARGE syndrome VACTERL association
108
How does TOF causes symptoms?
- The VSD allows blood to flow between the ventricles. - Due to the overriding aorta (where the aortic valve is abnormally far right, above the VSD), when the right ventricle contracts and sends blood upwards the aorta is in the direction of travel of that blood therefore a greater proportion of deoxygenated blood enters the aorta from the right side of the heart. - Stenosis of the pulmonary valve provides greater resistance against the flow of blood from the RV which encourages blood to flow through the VSD and into the aorta rather than taking the normal route into the pulmonary vessels - Therefore the overriding aorta and pulmonary stenosis encourage blood to be shunted from the right heart to the left, causing cyanosis - The increased strain on the right ventricle causes right ventricular hypertrophy, with thickening of the heart muscle - These cardiac abnormalities cause a right to left cardiac shunt which means blood bypasses the child's lungs and is not oxygenated as normal
109
What are some of the risk factors for TOF? x8
1st degree family history of Chd Parent with TOF Parent with DiGeorge syndrome Foetal exposure to teratogens in utero (e.g. alcohol, warfarin and trimethadione) Poorly controlled maternal diabetes Maternal intake of retinoic acid Congenital rubella infection Increased maternal age (40+ years old)
110
What are the 3 major clinical subtypes of TOF?
TOF with mild pulmonary stenosis (cyanosis usually develops around 1-3 years old) TOF with pulmonary atresia (presents with cyanosis and resp distress within first few weeks of life) TOF with an absent pulmonary valve (most severe --> cyanosis and respiratory distress within the first few hours of life)
111
What are the signs of TOF? x4
central cyanosis clubbing respiratory distress signs on auscultation: thrill, heave, ejection systolic murmur in pulmonary area...
112
What are the investigations for TOF?
1st line: antenatal screening, clinical examination GS: foetal echocardiogram other: pulse oximetry, ECG, genetic testing, CXR
113
What is the management for TOF?
surgical intervention usually within the first year of life some patients receive a bridging procedure before complete repair of the TOF in some infants, a prostaglandin infusion is given to maintain a patent ductus arteriosus so that blood flow to the pulmonary circulation is maintained
114
What is a 'tet' spell?
a complication of an unrepaired TOF where there is sudden episode of profound cyanosis and hypoxia - can be fatal
115
What are the potential causes of 'tet' spells? x5
Decrease in O2 sats (e.g. crying, emotional/physical distress) Decrease in systemic vascular resistance (e.g. while playing) Increase in pulmonary vascular resistance Tachycardia Hypovolemia
116
What is the management for 'tet' spells?
1 - position the child with their knees at their chest 2 - give oxygen 3 - morphine to decrease resp drive 4 - IV fluids - increase pre-load and so increase volume of blood which flows into the pulmonary vessels 5 - BB’s - relaxes the R ventricle infundibulum and improves the flow of blood to the pulmonary vessels 6 - Phenylephrine infusion - increases systemic vascular resistance 7 - emergency ventricular outflow tract stent or BT shunt 8 - sodium bicarb if there is metabolic acidosis
117
What is rheumatic fever?
A systemic inflammatory disorder which arises as a complication following group A strep infection
118
What are the risk factors for rheumatic fever? x8
age (5-15 yr olds) female ethnicity - higher prevalence in indigenous populations in Australia and NZ genetic susceptibility prior or untreated infection with group A strep low socioeconomic status overcrowding and poor housing
119
What are the Jones criteria for RF diagnosis?
In order to establish a diagnosis of RF, there must be: Evidence of recent group A strep infection Positive throat swab Positive rapid strep antigen test Raised strep antibody titre Recent episode of scarlet fever Plus either: 2 major criteria Or 1 major criterion and 2 minor criteria
120
What are the major Jones criteria for RF diagnosis?x5
Polyarthritis Carditis (50% of patients) - could be pancarditis, endocarditis, myocarditis, pericarditis Sydenham's chorea (10% of patients) Erythema marginatum Subcutaneous nodules
121
What are the minor Jones criteria for RF diagnosis?
polyarthralgia prolonged PR interval on ECG Hx of RF Fever Raised inflamm markers
122
What are the differentials for rheumatic fever? x4 symptoms specific
Joints symptoms (reactive arthritis, juvenile idiopathic arthritis, HSP) Cardiac disease (cardiomyopathy, Kawasaki disease, IE) Chorea (Wilson’s disease, adverse drug reactions) Skin changes (adverse drug reactions, lyme disease/erythema migrans, erythema multiforme)
123
What is the recommended management for rheumatic fever?
Bed rest is 1st line treatment even if patient feels well until CRP has returned to normal If suspected active myocarditis limitation of exercise is strongly advised Medical management: Stat dose of IV benzylpenicillin followed by oral penicillin V for at least 10 days High dose aspirin to limit inflam response Acute heart failure requires combination of ACEi’s and diuretics Prophylaxis: After the initial attack the child should be followed up regularly and prophylactic treatment started to reduce the chance of any future attacks
124
What is the triad of features which indicate infective endocarditis
endothelial damage platelet adhesion microbial adherence
125
What are the main causative organisms for infective endocarditis? x3
staph aureus strep viridans strep pneumoniae
126
What are the key symptoms of infective endocarditis? x4
Persistent low-grade fever without clear cause Heart murmur Splenomegaly Can also present in a non-acute or subacute form with non-specific symptoms like fatigue, malaise, weight loss, myalgia or even asymptomatic
127
What are the skin/nail changes indicative of infective endocarditis?
Petechiae Osler’s nodes Janeway lesions Splinter haemorrhages
128
What is the gold standard test for IE?
echocardiogram
129
What is supraventricular tachycardia?
a rapid heart rate of between 250-300bpm caused by premature activation of the atrium via an accessory pathway resulting in a circuit of conduction
130
What is the management for supraventricular tachycardia?
sinus rhythm is restored by: - Circulatory and respiratory support - Vagal stimulation manoeuvres - Intravenous adenosine (treatment of choice) - Electrical cardioversion following this maintenance therapy is required with flecainide or sotalol
131
What is the treatment for congenital complete heart block?
all children with symptoms require insertion of an endocardial pacemaker
132
What is the usual cause of congenital complete heart block?
usually related to the presence of anti-Ro or anti-La antibodies in the maternal serum - this antibody appears to prevent normal development of the electrical conduction system in the developing heart, with atrophy and fibrosis of the AV node - the mother will either have manifest or latent connective tissue disorders
133
What are the major complications of congenital complete heart block>
foetal hydrops death in utero neonatal heart failure
134
What is long QT syndrome?
a channelopathy caused by autosomal dominant gene mutations which results in abnormalities of the sodium, potassium, or calcium channels leading to a gain or loss of function
135
What are the risk factors for long QT syndrome? x3
erythromycin therapy, electrolyte disorders and head injury
136
What symptoms are associated with long QT syndrome?
sudden loss of consciousness during exercise, stress or emotion
137
What are the 3 fetal shunts? what structures do they connect/bypass?
ductus venosus - connects the umbilical vein to the IVC so that blood bypasses the liver foramen ovale - connects the right atrium with the left atrium allowing blood to bypass the right ventricle and pulmonary circulation ductus arteriosus - connects the pulmonary artery with the aorta so blood bypasses the pulmonary circulation
138
What changes occur in the foetal circulation at birth?
1. At the first breath the alveoli expand decreasing the pulmonary vascular resistance - this causes a fall in pressure in the right atrium so that the left atrial pressure > the right atrial pressure - this squashes the atrial septum causing CLOSURE OF THE FORAMEN OVALE which becomes the fossa ovalis 2. Prostaglandins are required to keep the ductus arteriosus open. - increased blood oxygenation causes a drop in circulating prostaglandins which causes CLOSURE OF THE DUCTUS ARTERIOSUS which becomes the ligamentum arteriosum 3. Immediately after birth the ductus venosus stops functioning because the umbilical cord is clamped and there is no flow in the umbilical veins - the DUCTUS VENOSUM structurally CLOSES a few days later and becomes the ligamentum venosum
139
What are innocent murmurs?
very common in children caused by fast blood flow through various areas of the heart during systole
140
What are the typical features of innocent murmurs? 5 S's
Soft Short Systolic Symptomless Situation dependent
141
What are some common differentials for diarrhoea? x8
gastroenteritis IBD lactose intolerance coeliac disease cystic fibrosis toddler's diarrhoea IBS medications (e.g. antibiotics)
142
What does a patent ductus arteriosus sound like?
machinery murmur at the upper left sternal edge
143
What are some causes of chronic diarrhoea in infants? x4
most common: cow's milk intolerance toddler's diarrhoea coeliac disease post-gastroenteritis lactose intolerance
144
What are the differentials of pan-systolic murmurs? x3
mitral regurgitation (heard at the 5th intercostal space, mid-clavicular line) tricuspid regurgitation (heard at the 5th intercostal space, left sternal border) ventricular septal defect (heard at the left lower sternal border)
145
What are the differentials of ejection-systolic murmurs? x3
aortic stenosis (heard at the 2nd intercostal space, right sternal border) pulmonary stenosis (heard at the 2nd intercostal space, left sternal border) hypertrophic obstructive cardiomyopathy (heard at the 4th intercostal space on the left sternal border)
146
What causes splitting of the 2nd heart sound?
a delay between the aortic and pulmonary valves closing - this occurs normally with inspiration in children as the chest wall and diaphragm pull the heart and lungs open and cause the right side of the heart to fill faster as it pulls in blood from the venous system - the increased volume in the right ventricle causes it to take longer for the right ventricle to empty during systole, causing a delay in the pulmonary valve closing
147
What murmur is caused by an atrial septal defect?
mid-systolic crescendo-decrescendo murmur which is loudest at the upper left sternal border with a fixed split second heart sound
148
What murmur is caused by a patent ductus arteriosus?
small PDAs may not cause any abnormal heart sounds more significant PDAs cause a normal 1st heart sound with a continuous crescendo-decrescendo "machinery" murmur that may continue during the second heart sound
149
What murmur is heart in tetralogy of Fallot ?
ejection systolic murmur due to pulmonary stenosis
150
What is GORD?
Gastro-oesophageal reflux disease where there is involuntary passage of gastric contents into the oesophagus which is non-self-limiting
151
What is the usual cause of GORD?
inappropriate relaxation of the lower oesophageal sphincter as a result of functional immaturity it is common within the first year of life but almost all symptomatic reflux resolves spontaneously by 12 months of age this is most likely due to a combination of maturation of the lower oesophageal sphincter, assumption of an upright posture and more solids in the diet.
152
What are some risk factors for GORD? x4
cerebral palsy neurodevelopmental disorders preterm infants, especially those with bronchopulmonary dysplasia surgery for oesophageal atresia or diaphragmatic hernia
153
What are some key symptoms of GORD? x6
Recurrent regurgitation and vomiting Oesophagitis Recurrent pulmonary aspiration Apparent life-threatening events Chronic cough Hoarse cry
154
What are some signs of GORD in children? x4
poor weight gain distress, crying or unsettled after feeding faltering growth from severe vomiting dystonic neck posturing (Sandifer's syndrome)
155
What is the management for GORD?
Feed thickening Acid suppression with either hydrogen receptor antagonists (e.g. ranitidine) or PPIs (omeprazole) Surgical management is reserved for children complications unresponsive to intensive medical treatment for esophageal stricture (Nissen fundoplication = fundus of the stomach is wrapped around the intra-abdominal oesophagus)
156
What is pyloric stenosis?
hypertrophy and consequent narrowing of the gastric pylorus
157
What is the pathophysiology of pyloric stenosis?
The muscles of the gastric pylorus are abnormally thickened causing narrowing and prevention of food travelling from the stomach to the duodenum as normal. after feeding there is increasingly powerful peristalsis in the stomach as it tries to push food into the duodenum. Eventually it becomes so powerful that it ejects the food into the oesophagus and out of the mouth i.e. projectile vomiting.
158
What are the key symptoms of pyloris stenosis? x3
Projectile, non-bilious vomiting Increased hunger Thin, pale and generally failing to thrive
159
What are the signs of pyloric stenosis on examination? x2
visible gastric peristalsis palpable abdominal mass on test feed
160
What are the investigations for pyloric stenosis?
Clinical examination, Blood gas analysis (indicates hypochloremic metabolic alkalosis due to vomiting of hydrochloric acid from the stomach) Abdominal ultrasound (GS)
161
What is the management for pyloric stenosis?
IV fluids to correct any fluid/electrolyte imbalances Laparoscopic pyloromyotomy (Ramstedt’s operation)
162
What is gastroenteritis?
Inflammation from the stomach to the intestines which presents with nausea, vomiting and diarrhoea
163
What are the most common causes of gastroenteritis?
Most commonly viral cause: rotavirus, norovirus (highly contagious) Bacterial causes: E. coli, Campylobacter jejuni, shigella, salmonella
164
What is the management for gastroenteritis?
Extremely contagious so strict infection control and barrier nursing are key in hospital management Fluid challenge Antidiarrheals like loperamide Antiemetic medications like metoclopramide Antibiotics should only be given in patients who are at risk of complications once the causative organism is confirmed
165
What are some potential complications of gastroenteritis? x4
lactose intolerance, IBS, reactive arthritis, GBS
166
How would you define constipation?
The infrequent passage of dry, hardened faeces often accompanied by straining or pain and bleeding associated with hard stools. Can also be associated with abdominal pain, which comes and goes with passage of stool or overflow soiling.
167
What are some risk factors for constipation? x6
Habitually not opening bowels Low fibre diet Poor fluid intake and dehydration Sedentary lifestyle Psychosocial problems such as difficult home or school environment
168
What are some underlying conditions which can result in constipation? x6
Hirschsprung disease, lower spinal cord problems, anorectal abnormalities, hypothyroidism, coeliac disease and hypercalcaemia
169
What is the recommended management for constipation?
Correct any reversible contributing factors, recommend a high fibre diet and good hydration Start laxatives (movicol is first line) Faecal impaction may require a disimpaction regimen with high doses of laxatives at first Toilet training/encouragement. This could involve scheduling visits, a bowel diary and star charts.
170
What are the red flag symptoms for constipation? x5
failure to pass meconium within first 24 hrs of life (Hirschsprung’s disease) gross abdominal distension, abnormal lower limb neurology or deformity Sacral dimple above natal cleft, over the spine Abnormal appearance/position/patency of anus
171
What are the key symptoms of appendicitis? x7
Abdominal pain (typically central abdominal pain which moves down to the right iliac fossa and then becomes localised there) Loss of appetite Nausea + vomiting Rovsing’s sign Guarding on abdominal palpation Rebound tenderness Percussion tenderness
172
What are the investigations for appendicitis?
Clinical presentation, CT scan Diagnostic laparoscopy (can be progressed to appendectomy)
173
What are some differentials for appendicitis? x5
Ectopic pregnancy Ovarian cysts Meckel’s diverticulum Mesenteric adenitis Appendix mass
174
What is intussusception?
The invagination of the proximal bowel into a distal segment. Most commonly involves ileum passing into the caecum through the ileocaecal valve It is the most common cause of intestinal obstruction in infants after the neonatal period
175
What age range is peak presentation of intussusception?
3months - 2 years
176
What are some risk factors for intussusception? x5
Concurrent viral illness Henoch-Schonlein purpura Cystic fibrosis Intestinal polyps Meckel diverticulum
177
What are some key symptoms of intussusception? x6
paroxysmal , severe colicky pain with pallor Refusal of feeds Vomiting Sausage shaped mass which may be palpable in the abdomen Red-currant jelly stool comprising blood stained mucus Abdominal distension and shock
178
What are the investigations for intussusception?
Abdo XR GS: Abdo USS or contrast enema
179
What is the management for intussusception?
Iv fluid resuscitation is likely to be required Reduction is attempted by rectal air insufflation unless peritonitis is present Surgery is required if reduction with air is unsuccessful or for peritonitis
180
What is a serious potential complication of intussusception?
stretching and constriction of the mesentery resulting in venous obstruction causing engorgement and bleeding from the bowel mucosa, fluid loss and bowel perforation, peritonitis and gut necrosis
181
What is coeliac disease?
An autoimmune condition where exposure to gluten causes an immune reaction which creates inflammation in the small intestine Usually develops in early childhood but can start at any age
182
What are the 2 main antibodies responsible for coeliac?
The 2 main antibodies are anti-tissue transglutaminase (anti-TTG) and anti-endomysial (anti-EMA)
183
What is the pathophysiology of coeliac disease?
In coeliac disease autoantibodies are created in response to exposure to gluten These autoantibodies target the epithelial cells of the intestine and lead to inflammation Inflammation affects the small bowel, particularly the jejunum. It causes atrophy of the intestinal villi. The intestinal cells have villi on them that help with absorbing nutrients from the food passing through the intestine. The inflammation causes malabsorption of nutrients and disease related symptoms.
184
What are the risk factors for coeliac disease? x6
Type 1 diabetes Thyroid disease Autoimmune hepatitis Primary biliary cirrhosis Primary sclerosing cholangitis Down’s syndrome
185
What are some key symptoms of coeliac disease? x6`
Failure to thrive (young children) Diarrhoea Fatigue Weight loss Mouth ulcers Anaemia secondary to iron, B12 or folate deficiency
186
What are the investigations used to diagnose coeliac disease?
Investigations must be carried out whilst the patient remains on a diet containing gluten otherwise it may not be possible to detect the antibodies or bowel inflammation Check total immunoglobulin A levels to exclude IgA deficiency Check anti-TTG and anti-endomysial antibodies GS: Endoscopy and intestinal biopsy (show crypt hypertrophy and villous atrophy)
187
What is the management for coeliac disease?
lifelong gluten free diet disease monitoring
188
What are the complications of untreated coeliac disease? x7
Vitamin deficiency Anaemia Osteoporosis Ulcerative jejunitis Enteropathy-associated T-cell lymphoma (EATL) of the intestine Non-Hodgkin lymphoma (NHL) Small bowel adenocarcinoma (rare)
189
What is the definition of failure to thrive?
poor physical growth and development in a child
190
What is the definition of faltering growth?
the failure to gain adequate weight or achieve adequate growth during infancy and childhood. weight that has fallen down 2 centile lines
191
What are the thresholds for concern with faltering growth?
One or more centile spaces if their birth weight was below the 9th centile Two or more centile spaces if their birth weight was between the 9th and 91st centile Three or more centile spaces if their birth weight was above the 91st centile
192
What are some causes of failure to thrive? x5
Inadequate nutritional intake Difficulty feeding Malabsorption Increased energy requirements Inability to process nutrition
193
What are some causes of inadequate nutrition? x4
Maternal malabsorption if breastfeeding Iron deficiency anaemia Neglect Availability of food (i.e. poverty)
194
What are some causes of malabsorption? x5
Cystic fibrosis Coeliac disease Cows milk intolerance Chronic diarrhoea Inflammatory bowel disease
195
What are some causes of increased energy requirements? x4
Hyperthyroidism Chronic disease, for example congenital heart disease and cystic fibrosis Malignancy Chronic infections e.g. HIV or immunodeficiency
196
What are the recommended investigations for faltering growth? x2
Urine dipstick for UTI Coeliac screen
197
What is the recommended management for inadequate nutrition in children?
Encourage regular structured mealtimes and snacks Reduce milk consumption to improve appetite for other foods Review by a dietician Additional energy dense foods to boost calories Nutritional supplements drinks
198
What is the definition of malnutrition?
the cellular imbalance between the supply of nutrients and energy and the body’s demand for them to ensure growth, maintenance, and specific functions.
199
Why are pre-school age children at increased risk of malnutrition?
because of their dependence on others for food, increased protein and energy requirements, immature immune systems causing a greater susceptibility to infection, and exposure to unhygienic conditions
200
What is PEM?
Protein-energy malnutrition - a group of related disorders which include marasmus, kwashiorkor and intermediate states of marasmus-kwashiorkor
201
What is the definition of kwashiorkor?
a PEM disorder characterised by nutritional oedema and metabolic disturbances, including hypoalbuminemia and hepatic steatosis
202
What is the typical presentation of a child with kwashiorkor?
peripheral pitting oedema, “moon facies”, hepatomegaly, pursed mouth
203
What is the pathophysiology of kwashiorkor?
adequate carbohydrate consumption and reduced protein intake in kwashiorkor which leads to decreased synthesis of important proteins The resulting hypoalbuminaemia contributes to extravascular fluid accumulation Impaired synthesis of B-lipoprotein produces a fatty liver Diarrhoea and psychomotor changes are also seen Skin becomes dark, dry and splits open when stretched (enamel paint skin)
204
What is the definition of marasmus
= an adaptive response to starvation characterised by severe wasting
205
What is the typical presentation of marasmus?
low weight-for-height and have a reduced mid-upper arm circumference, as well as a head which appears large relative to the rest of their body, also dry skin, thin hair, irritability
206
What is the pathophysiology of marasmus?
Occurs when there is an insufficient energy intake to match the body’s requirements This results in the body using its own stores which results in emaciation “Monkey facies” as a result of loss of buccal fat pads The skin is xerotic, wrinkled and loose Fine, brittle hair, alopecia, impaired growth, nail fissuring
207
What is the management for PEM disorders?
Priority is correcting fluid and electrolyte imbalances and treatment of any infections Macronutrient repletion should be commenced within 48 hrs Topical zinc paste can be used to heal areas of skin breakdown in kwashiorkor Dietary therapy
208
What is Hirschsprung's disease?
A congenital condition where nerve cells of the myenteric plexus are absent in the distal bowel and rectum
209
What is the key pathophysiology of hirschsprung's disease?
the absence of parasympathetic ganglion cells which results in inability of the aganglionic section to relax so it becomes constricted and movement of faeces is lost → bowel obstruction
210
Which conditions are associated with Hirschsprung's disease? x4
Downs syndrome Neurofibromatosis Waardenburg syndrome Multiple endocrine neoplasia type II
211
What are the symptoms of Hirschsprung's disease? x6
Variable presentation Delay in passing meconium (more than 24hrs) Chronic constipation since birth Abdo pain and distension Vomiting Poor weight gain and failure to thrive
212
What are the investigations for Hirschsprung's disease?
Abdominal x-ray GS: Rectal biopsy
213
What is the management for Hirschsprung's disease?
Unwell children + those with enterocolitis will require fluid resuscitation and management of intestinal obstruction IV antibiotics are required in HAEC Definitive management is by surgical removal of the aganglionic section of the bowel
214
What is biliary atresia?
A congenital condition where a section of the bile duct is either narrowed or absent. This results in cholestasis, where the bile cannot be transported from the liver to the bowel. Conjugated bilirubin is excreted into the bile, therefore biliary atresia prevents the excretion of conjugated bilirubin.
215
What are the symptoms of biliary atresia? x6
Significant persistent jaundice shortly after birth (high conjugated bilirubin levels) Pale stools and dark urine Pruritus Normal birth weight followed by faltering growth Hepatomegaly is often present initially Splenomegaly develops due to portal hypertension
216
What are the investigations for biliary atresia?
Unconjugated and conjugated bilirubin, fasting abdo USS GS: ERCP Liver biopsy
217
What is the management for biliary atresia?
Kasai portoenterostomy is the only treatment for biliary atresia and involves attaching a section of the small intestine to the opening of the liver where the bile duct normally attaches. This is somewhat successful and can clear the jaundice and prolong survival however the disease progresses in most children who may develop cholangitis and cirrhosis with portal hypertension. Nutrition and fat-soluble vitamin supplementation is essential Definitive treatment is a full liver transplant
218
What is a choledochal cyst?
Congenital cystic dilatations of the extrahepatic biliary system
219
What are the symptoms of choledochal cysts?
Neonatal jaundice and acholic stools In older children: abdo pain, RUQ palpable mass, jaundice or cholangitis
220
What are the investigations for choledochal cysts
FBC, LFTs, amylase and lipase, serum chemistry GS: Abdo USS/MRCP
221
What is the management for choledochal cysts
Surgical excision of the cyst with the formation of a Roux-en-Y anastomosis to the biliary duct
222
What are some of the potential triggers in IBS? x5
- food poisoning/gastroenteritis - stress - irregular eating or abnormal diet - certain medications - interaction between the brain and gut
223
What are some risk factors for IBS? x3
Family history physical /sexual abuse PTSD
224
What are some of the symptoms of IBS? x5
Non-specific abdominal pain (often periumbilical and may be relieved by defecation) Explosive, loose, or mucousy stools Bloating Feeling of incomplete defecation Constipation (often alternating with normal or loose stools)
225
What is the management for IBS? (conservative, moderate and severe)
Conservative = patient/parent education (diet changes) + reassurance Moderate = IBS-C → laxatives (e.g. senna), IBS-D → antimotility drug (loperamide) Severe = TCA (tricyclic antidepressants e.g. amitriptyline) + consider CBT/GI referral
226
What is Crohn's disease?
Transmural (all 4 layers) autoimmune inflammation affecting the whole GI tract, especially terminal ileum + proximal colon (usually rectum spared). Associated with skip lesions on endoscopy
227
What are the key symptoms of Crohn's disease? x5
Abdominal pain Diarrhoea Weight loss Fever Lethargy
228
What are the investigations for Crohns?
pANCA -ve (may be ASCA +ve) Faecal calprotectin ↑ Biopsy = transmural inflammation with non-caseating granulomas Endoscopy - skip lesions, cobblestoned appearance of GI tract, string sign (narrowing of GI tract)
229
What is the management for Crohn's?
nutritional therapy to induce remission (whole protein modular feeds for 6-8 weeks) systemic steroids if nutritional therapy ineffective immunosuppressant medications e.g. azathioprine, mercaptopurine or methtrexate to maintain remission Anti-tumour necrosis factor agents (infliximab or adalimumab) when no response to conventional treatments surgery can be indicated for complications like obstructions, fistulae, abscesses
230
What is ulcerative colitis?
recurrent, inflammatory and ulcerating disease involving the colonic mucosa
231
Which gene and antibody are associated with UC?
HLAB27 and pANCA
232
What are the key symptoms of UC? x3
rectal bleeding diarrhoea colicky pain
233
What are the systemic/non-GI signs of UC? x5
weight loss growth failure uveitis/episcleritis erythema nodosum arthritis
234
What are the investigations for UC?
pANCA +ve Faecal calprotectin ↑ (non-specific) Biopsy = mucosal inflammation with crypt hyperplasia Colonoscopy = continuous, “lead pipe” sign (loss of haustrations)
235
What scoring system is used to assess the severity of UC flares?
Severity of flares are assessed by Trueglove + Witts scoring (mild/moderate/severe)
236
What is the management for UC?
Aminosalicylates (e.g. mesalazine) are used for induction and maintenance therapy Disease confined to the rectum and sigmoid colon (rare in children) may be managed with topical steroids More aggressive or extensive disease requires systemic steroids for acute exacerbations and immunomodulatory therapy e.g. azathioprine alone to maintain remission or in combination with low-dose corticosteroid therapy Biologics may be used in therapy resistant disease Colectomy with an ileostomy or ileorectal pouch is undertaken for severe fulminating disease, which may be complicated by a toxic megacolon, or for chronic poorly controlled disease
237
What is Meckel's diverticulum?
an ileal remnant of the vitello-intestinal duct which contains ectopic gastric mucosa or pancreatic tissue
238
What are the usual presentations of Meckel's diverticulum?
severe rectal bleeding with an acute reduction in haemoglobin intussusception volvulus diverticulitis
239
What is the investigation for Meckel's diverticulum?
Technetium scan will demonstrate increased uptake by ectopic gastric mucosa in 70% of cases
240
What is the treatment for Meckel's diverticulum
surgical resection
241
What is toddler's diarrhoea?
chronic nonspecific diarrhoea with 3+ loose watery stools per day Child is otherwise well and usually resolves on its own
242
What is colic?
paroxysmal, inconsolable crying or screaming often accompanied by drawing up of the knees and passage of excessive flatus several times a day
243
What is the management of colic?
parental reassurance and support but no medical treatments needed
244
At what age is colic usually seen?
first few weeks of life until 3-12 months
245
What is the definition of a cow's milk allergy?
reproducible immune-mediated allergic response to one or more proteins in cow’s milk
246
At what age does cow's milk allergy usually present?
in the first 3 months of life in formula fed infants
247
What are the signs/symptoms of cow's milk allergy?
Regurgitation and vomiting Diarrhoea urticaria , atopci eczema ‘Colic’ symptoms - irritability, crying Wheeze, chronic cough Rarely angioedema and anaphylaxis may occur
248
What are the investigations for cow's milk allergy?
Diagnosis is most often clinical (e.g. improvement of symptoms with cow’s milk protein elimination) Skin prick/patch testing Total IgE and specific IgE rapid antigen spot testing (RAST) for cow’s milk protein
249
What is the management for cow's milk allergy? formula vs breast-fed
formula fed - extensive hydrolysed formula milk - if no response to eHF, amino acid-based formula in infants with severe CMPA breastfed - continue breastfeeding - eliminate cow's milk protein from maternal diet - use eHF milk when breastfeeding stops
250
What symptoms and signs are seen with neonatal hepatitis syndrome?
Baby has intrauterine growth restriction, Jaundice, failure to thrive, itchy rash, dark urine hepatomegaly
251
What are the signs of liver biopsy of neonatal hepatitis syndrome?
raised unconjugated and conjugated bilirubin multinucleated giant cells + Rosette formation
252
What are the 2 main causes of physiological jaundice in newborns?
foetal haemoglobin - this has a shorter lifespan than adult haemoglobin and is constantly being broken down - the newborn liver cannot cope with the large volumes of bilirubin resulting in build up in the blood breastfeeding jaundice - breastfed babies are often more jaundiced, and for longer than bottle-fed babies
253
What are some causes of acugte liver failure in children <2yrs old?
infection metabolic disease seronegative hepatitis drug-induced neonatal haemochromatosis
254
What are febrile convulsions/seizures?
a seizure accompanied by a fever in the absence of intracranial infection
255
Between what ages do febrile seizures usually occur?
6 months to 5 years
256
What are some differential diagnoses for febrile seizures? x6
* epilepsy * meningitis, encephalitis or other neurological infection * intracranial space occupying lesions e.g. brain tumours, intracranial haemorrhage * syncopal episode * electrolyte abnormalities * trauma
257
What is the typical presentation of a febrile convulsion?
child around 6 months presenting with a 2-5 min tonic-clonic seizure during a high fever
258
What's the difference between simple and complex febrile convulsions? how is the management different?
simple = generalised, tonic clonic seizures, <15 min and only occur once during single febrile illness - management is reassurence and education complex = partial or focal seizures, >15 mins, occur multiple times during one febrile illness - may need further investigation and hospitalisation
259
What are infantile spasms?
also known as West syndrome a rare disorder characterised by clusters of full body spasms which start around 6 mo age
260
What is the prognosis and treatment for infantile
poor prognosis : 1/3 die by 25 yrs, 1/3 seizure free treatment: prednisolone vigabatrin
261
What are blue breath-holding spells? can they be treated?
occur in some toddlers when they are upset the child cries, holds his breath in expiration and goes blue sometimes children will briefly lose consciousness but rapidly fully recover drug therapy is not helpful but behaviour modification therapy with distraction may help
262
What is reflex asystolic syncope?
also known as reflex anoxic seizures where the child becomes pale and falls to the floor following a trigger - the hypoxia may induce a generalised tonic-clonic seizure occur in infants and toddlers commonest trigger = pain or discomfort particularly from minor head trauma, cold food, fright or fever
263
What are the main features of ADHD? x6
Very short attention span Quickly moving from one activity to another Quickly losing interest in a task and not being able to persist with challenging tasks Constantly moving or fidgeting Impulsive behaviour Disruptive or rule breaking
264
What causes ADHD?
ADHD is most likely caused by a complex interplay of factors: neurobiologic (neuroanatomical and neurochemical) genetic influences environmental/psychosocial factors CNS insults (such as perinatal factors, CNS infections, FAS or premature.) Research repeatedly demonstrates that ADHD runs in families
265
What are the 3 core behaviours of ADHD?
1. Hyperactivity. 2. Inattention. 3. Impulsivity. (HII) These symptoms occur in every child from time to time but when they are persistent and impact on daily functions, more investigation is needed
266
ADHD core behaviours: give 3 signs of hyperactivity.
Fidgety. Talkative. Noisy. Can’t remain seated. Often ‘On the go’ or acts as if driven by a motor
267
ADHD core behaviours: give 3 signs of impulsivity.
Blurts out answers. Interrupts. Difficulty waiting turns. When older, pregnancy and drug use.
268
ADHD core behaviours: give 3 signs of inattention.
Easily distracted. Not listening. Mind wandering. Struggling at school. Forgetful. Organisational problems. Does not appear to be listening when spoken to directly Makes careless mistakes Loses important items
269
What tools can be used to diagnose ADHD?
Clinical interview - are there any RF’s for ADHD? ADHD nurse classroom observation. Questionnaires (SNAP), Conor’s questionaire Quantitative behavioural (QB) analysis.
270
What is the treatment for ADHD?
Education. Parenting programmes and school support. Medications e.g. methylphenidate. (Conerta, Equaysm), or Lisdexamfetamine (Elvanse)
271
What is cryptorchidism
undescended testes
272
what are some risk factors for cryptorchidism?
Preterm birth Family history Low birth weight Small for gestational age Maternal smoking during pregnancy
273
what is the management for cryptorchidism in newborns?
Watching and waiting is appropriate in newborns as most will descend within the first 3-6 months
274
At what age should children with unilateral cryptorchidism be referred?
consider from 3 months baby should see urological surgeon at 6 months
275
what percentage of boys have undescended testes at birth? where may they be instead?
In about 5% of boys the testes have not made it out of the abdomen by birth. At this point they are called undescended testes. They might be palpable in the inguinal canal (in the inguinal region), which is not technically classed as undescended testes, although they have not fully descended at that point.
276
what are some potential complication of untreated cryptorchidism?
Undescended testes in older children or after puberty hold a higher risk of testicular torsion, infertility and testicular cancer.
277
what is the treatment for cryptorchidism?
orchidoplexy (surgical correction) should be carried out between 6-12 months of age
278
what is testicular torsion?
twisting of the spermatic cord with rotation of the testicle which leads to ischaemia and eventually necrosis urological emergency with 6 hour window after onset before ischaemic damage is irreversible
279
what are the examination findings with testicular torsion? x5
Firm swollen testicle Elevated (retracted) testicle Absent cremasteric reflex Abnormal testicular lie (often horizontal) Rotation, so that epididymis is not in normal posterior position
280
What symptoms are associated with testicular torsion?
rapid onset unilateral testicular pain abdo pain vomiting
281
What is a bell clapper deformity?
one of the causes of testicular torsion where the fixation between the testicle and the tunica vaginalis is absent so the testicle hangs in a horizontal position (like a bell-clapper) instead of the typical more vertical position it is able to rotate within the tunica vaginalis, twisting at the spermatic cord
282
what is the management for testicular torsion?
urological emergency! nil by mouth (in preparation for surgery) analgesia urgent senior urology assessment surgical exploration of the scrotum orchiopexy (correcting the position of the testicles and fixing them in place) orchidectomy (removing the testicle) - if there is necrosis
283
What sign can be seen on scrotal ultrasound to confirm testicular torsion?
whirpool sign (spiral appearance to the spermatic cord and blood vessels)
284
What is a hydrocele?
Hydrocele refers to a collection of serous fluid between the parietal and visceral layers of the tunica vaginalis (membrane covering the testes).
285
what is the difference between simple and communicating hydroceles?
Simple - overproduction of fluid in the tunica vaginalis Communicating - processus vaginalis fails to close, allowing peritoneal fluid to communicate freely with the scrotal portion
286
What is the management for a hydrocele?
Management Resolve spontaneously Many of infancy resolve by 2 years Therapeutic aspiration or surgical removal
287
What is an epididymal cyst?
Smooth, extra-testicular, spherical sac of fluid in the head of the epididymis (top of testicle). - also known as a spermatocele
288
What are some investigations/differentials/management for an epididymal cyst?
Investigations - Scrotal ultrasound Differential diagnosis - Hydrocele - Varicocele Management - Usually not necessary - Removed, if symptomatic
289
What is the definition of precocious puberty?
development of secondary sexual characteristic before 8 years of age in females and 9 years of age in males
290
what are the 2 categories of precocious puberty?
gonadotrophin dependent (true precocious puberty) - caused by premature activation of the HPG axis - consonant (normal) sequence of pubertal development gonado-trophin independent (false precocious puberty) - caused by excess sex steroids outside the pituitary gland - dissonant sequence of pubertal development
291
what are some causes of precocious puberty in girls?
usually idiopathic or familial gonadotrophin-independent causes e.g. congenital adrenal hyperplasia or adrenal tumours gonadotrophin-dependent causes e.g. pituitary adenoma
292
What are the most common causes of precocious puberty in males?
more likely to be pathological gonadotrophin-dependent causes e.g. intracranial tumour or rarely a liver tumour secreting beta-human chorionic gonadotrophin gonadotrophin-independent causes e.g. adrenal adenoma, congenital adrenal hyperplasia, gonadal tumour
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What is the management for precocious puberty?
detection and treatment of any underlying pathology reducing the rate of skeletal maturation addressing psychological/behavioural difficulties associated with early progression through puberty
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What are the causes of congenital hypothyroidism?
- maldescent of the thyroid and athyrosis - dyshormonogenesis (inborn error of thyroid hormone synthesis) - iodine deficiency - TSH deficiency
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give 5 clinical features of congenital hypothyroidism?
* faltering growth * feeding problems * prolonged jaundice * constipation * pale, cold, mottled dry skin * coarse facies * large tongue * hoarse cry * goitre (occasionally) * umbilical hernia * delayed development
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How is congenital hypothyroidism usually detected?
routine neonatal biochemical screening (Guthrie test) performed on all newborn infants, by identifying a raised TSH in the blood
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What is the treatment for congenital hypothyroidism?
levothyroxine before 2-3 weeks of age (needed this early to prevent impaired neurodevelopment) - treatment is lifelong
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What are the 2 types of hypogonadism?
Hypogonadotrophic hypogonadism (secondary): a deficiency of LH and FSH Hypergonadotrophic hypogonadism (primary): a lack of response to LH and FSH by the gonads (the testes and ovaries)
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What are some causes of hypogonadotrophic hypogonadism?
* Systemic disease: – cystic fibrosis, severe asthma, Crohn’s disease, organ failure, anorexia nervosa, starvation, excess physical training * Hypothalamo-pituitary disorders: – pituitary dysfunction – isolated gonadotrophin or growth hormone deficiency – intracranial tumours (including craniopharyngioma)
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What are some causes of hypergonadotrophic hypogonadism?
* Chromosomal abnormalities: – Klinefelter syndrome (47,XXY) – Turner syndrome (45,XO) * Steroid hormone enzyme deficiencies * Acquired gonadal damage: – postsurgery, chemotherapy, radiotherapy, trauma, torsion of the testis, autoimmune disorder
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What are some investigations used when diagnosing hypogonadism?
when there is no evidence of pubertal changes in a girl aged 13 or a boy aged 14 Full blood count and ferritin for anaemia U&E for chronic kidney disease Anti-TTG or anti-EMA antibodies for coeliac disease Early morning serum FSH and LH (the gonadotropins). Thyroid function tests Growth hormone testing. Insulin-like growth factor I is often used as a screening test for GH deficiency. Serum prolactin Genetic testing for: Kleinfelter’s syndrome (XXY) Turner’s syndrome (XO)
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What would the early morning FSH and LH levels look like in Hypogonadotrophic hypogonadism and hypergonadotrophic hypogonadism? When would imaging be useful, and where?
Early morning serum FSH and LH (the gonadotropins). These will be low in hypogonadotrophic hypogonadism and high in hypergonadotrophic hypogonadism. Imaging can be useful: Xray of the wrist to assess bone age and inform a diagnosis of constitutional delay Pelvic ultrasound in girls to assess the ovaries and other pelvic organs MRI of the brain to look for pituitary pathology and assess the olfactory bulbs in possible Kallman syndrome
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What is Kallman syndrome?
a genetic form of hypogonadotrophic hypogonadism, which prevents a person from starting or fully completing puberty
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what feature of Kallman's syndrome distinguishes it from other forms of hypogonadotrophic hypogonadism?
total lack of sense of smell or a reduced sense of smell
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What is the treatment for Kallman's syndrome?
hormone replacement therapy to replace testosterone or oestrogen and progesterone
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WHat inheritance pattern is seen in Kallman syndrome?
x-linked recessive or dominant
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what is congenital adrenal hyperplasia?
congenital deficiency of the 21-hydroxylase enzyme which causes underproduction of cortisol and aldosterone and overproduction of androgens from birth
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what is the inheritance pattern of congenital adrenal hyperplasia?
autosomal recessive
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briefly describe the pathophysiology of CAH
21-hydroxylase is the enzyme responsbile for converting progesterone into aldosterone and cortisol progesterone is used to make to testosterone but this process does not involve 21-hydroxylase in CAH, a defect in this enzyme results in more progesterone floating around which cant be converted into aldosterone or cortisol so it gets converted into testosterone instead this results in a patient with low aldosterone, low cortisol and abnormally high testosterone
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What it the presentation of CAH in severe cases
in female patients, CAH usually present at birth with virilised genitalia, known as ambiguous genitalia and an enlarged clitoris due to the high testosterone levels patients with more severe CAH present shortly afetr birth with hyponatraemia, hyperkalaemia and hypoglycaemia this leads to signs and symptoms: Poor feeding Vomiting Dehydration Arrhythmias
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What is the presentation of mild CAH in females
tall for their age facial hair absent periods deep voice early puberty
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What is the presentation of mild CAH in males?
tall for their age deep voice large penis small testicles early puberty
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why is skin hyperpigmentation a sign of CAH?
the anterior pituitary gland responds to the low levels of cortisol by producing increasing amounts of ACTH a byproduct of the production of ACTH is melanocyte stimulating hormone this hormone stimulates the production of melanin within skin cells
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what is androgen insensitivity syndrome ?
an x-linked recessive genetic condition where cells are unable to respond to androgen hormones due to a lack of androgen receptors previously known as testicular feminisation syndrome
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What is the presentation of androgen insensitivity syndrome?
genetically male patients with an externally female phenotype (normal female external genitalia and breast tissue) due to absent response to testosterone patients have testes in the abdomen or inguinal canal and no internal female organs no pubic or facial hair or male muscle development infertile
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What is partial androgen insensitivity syndrome and how does it present?
the cells have a partial response to androgens so have more ambiguous signs and symptoms such as micropenis or clitoromegaly
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What are the results of hormone tests in androgen insensitivity syndrome?
Raised LH Normal or raised FSH Normal or raised testosterone levels (for a male) Raised oestrogen levels (for a male)
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What is the management for androgen insensitivity syndrome?
MDT support bilateral orchidectomy to avoid testicular tumours oestrogen therapy vaginal dilators or vaginal surgery generally patients are raised female but this is sensitive and tailored to the individual
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What is the action of sodium valproate in epilepsy treatment?
increases the activity of GABA which has a relaxant affect on the brain by stopping the release of excitatory neurotransmitters
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What is status epilepticus?
medical emergency defined as seizures lasting more than 5 minutes or more than 3 seizures in one hour
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What is epilepsy?
an umbrella term for chronic conditions where patients have a tendency to have recurrent, unprovoked epileptic seizures
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What are seizures>
Transient episodes of abnormal electrical in the brain which cause changes in behaviour, sensation or cognitive processes
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What is a focal seizure?
originates in one hemisphere, retained awareness or impaired awareness, usually 2 minutes or less
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What are examples of focal seizures?
focal aware seizure, focal impaired awareness seizure
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What are examples of generalised seizures?
tonic-clonic, absence, myoclonic, tonic, atonic
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What are the risk factors for epilepsy?
FHx CNS infection history Head trauma Prior seizure events/suspected seizure events Hx of substance use Premature birth Multiple or complicated febrile seizures
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What are the stages of an epileptic seizure?
prodrome = mood changes, days before aura = minutes before, deja vu + automatisms (lip smacking, rapid blinking) - not always present (most commonly seen in temporal lobe epilepsy) ictal event = seizure post-ictal period = symptoms such as headache, confusion, ↓GCS, Todd's paralysis, dysphasia, amnesia, sore tongue (pts bite tongue during ictal phase)
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What are the positive ictal symptoms?
loss of awareness memory lapse feeling confused difficulty hearing odd smells, sounds or tastes loss of muscle control changes in speech/ability to speak
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What are examples of post-ictal symptoms?
confusion amnesia drowsiness hypertension headache nausea
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What are some other common features of epileptic seizures?
can occur from sleep can be associated with other brain dysfunction lateral tongue bite deja vu incontinence
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What are the investigations for epilepsy?
EEG, ECG, CT head + MRI
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How many seizures must a patient have had for epilepsy diagnosis to be considered?
2+
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What is the management for epilepsy?
aim is to be seizure free on the minimum anti-epileptic medications 1st line = sodium valproate
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What are the features of generalised tonic-clonic seizures?
no aura loss of consciousness tonic (muscle tensing, fall to floor) and clonic (muscle jerking) episodes typically tonic before clonic eyes open and upward gazing incontinence tongue biting post-ictal period
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What is the 1st and 2nd line treatment for generalised seizures?
1st line: sodium valproate 2nd line: lamotrigine or carbamazepine
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What are the characteristics of absence seizures?
typically occur in children patient becomes blank, stares into space and then abruptly returns to normal last 10-20 seconds
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WHat are the characteristic features of myoclonic seizures?
sudden brief muscle contractions like a sudden jump patient normally remains awake during the episode occur in various forms of epilepsy but typically happen in children as part of juvenile myoclonic epilepsy
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What are the characteristic features of focal seizures?
originate in temporal lobes affect hearing, speech, memory and emotions present with hallucinations, memory flashbacks, deja vu, doing strange things on autopilot
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What are the features of a frontal focal seizure?
Jacksonian march + Todd's palsy
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What are the features of a temporal focal seizure?
aura, dysphagia, post-ictal period
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what are the features of an occipital seizure?
vision changes
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What are the 1st and 2nd line treatments for focal seizures?
1st: carbamazepine or lamotrigine 2nd: sodium valproate or levetiracetam
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What is the difference between simple and complex focal seizures?
simple: no LOC, patient awake + aware, uncontrollable muscle jerking confined to one part of body complex: LOC, patient unaware, post-ictal period
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What are the causes of seizures? (VITAMINDE)
Vascular Infection Trauma Autoimmune e.g. SLE Metabolic e,g. Hypocalcaemia Idiopathic e.g. epilepsy Neoplasms Dementia + Drugs (cocaine) Eclampsia
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What are functional/dissociative seizures?
paroxysmal event in which changes in behaviour sensation and cognitive function caused by mental processes triggered by internal or external aversive stimuli
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What are the characteristics of functional/dissociative seizures?
situational duration 1-20 mins dramatic motor phenomena/prolonged atonia eyes closed ictal crying and speaking suprisingly rapid or slow post-ictal recovery history of psychiatric illlness, other somatoform disorders
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What is anorexia nervosa?
when a person feels they are overweight despite evidence of normal or low body weight involves obsessive restriction of calorie intake with the intention of losing weight often combined with excessive exercising and diet pills or laxatives to restrict absorption of food
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What are the 3 main ICD-10 criteria for anorexia nervosa?
Deliberately keeping weight <85% of expected Morbid fear of fatness (intensive overvalued idea) Endocrine effects (menstruation stops, delayed puberty, loss of sexual interest/potency)
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What are some of the symptoms/signs of anorexia nervosa? complications?
excessive weight loss amenorrhoea lanugo hair (fine, soft hair covering the body) hypokalaemia hypotension hypothermia changes in mood, anxiety and depression solitude cardiac complications include arrhythmia, cardiac atrophy and sudden cardiac death
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What is bulimia nervosa?
binge eating disorder normally associated with normal or fluctuating weight as people with the condition binge eat and then purge by inducing vomiting or taking laxatives to prevent calorie absorption
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What are some signs/symptoms of bulimia nervosa?
alkalosis (due to vomiting HCl from the stomach) hypokalaemia erosion of teeth swollen salivary glands mouth ulcers gastro-oesophageal reflux and irritation Russell's sign - calluses on the knuckles where they have been scraped across the teeth
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What is Type I diabetes?
An insulin deficiency disease characterised by loss of beta cells due to autoimmune destruction.
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What are the risk factors for T1 Diabetes?
- HLA DR3 and DR4 and islet cell antibodies - Other autoimmune diseases - Environmental infections (e.g. viruses)
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What is the cause of Type I diabetes?
Beta cells express HLA (human leukocyte antigen) which activates a chronic cell mediated immune process leading to chronic 'insulitis' and consequently insulin insufficiency
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What is the typical presentation/symptoms of Type I DM?
Young lean pt - polydipsia - nocturia/polyuria - glycosuria - polyphagia (excessive eating) + weight loss - excessive tiredness
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What is the treatment for T1DM?
Basal Bolus Insulin - basal = longer acting to maintain stable insulin levels throughout day - bolus = faster acting, 30 mins preprandial to give "insulin spike"
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What is diabetic ketoacidosis?
Result of too much gluconeogenesis so that glucose is converted to ketone bodies which are acidic. Caused by poorly managed T1 DM or from infection/illness
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What are the signs of diabetic ketoacidosis?
T1DM symptoms +... - Kussmaul breathing (deep laboured breaths to compensate for increased CO2) - Pear drop breath (breath smells fruity due to ketones) - Reduced tissue turgor, hypotension + tachcardia
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What are the diagnostic blood concentrations of ketones, glucose and acid in DKA?
Ketones >3mmol/l Random plasma glucoe >11.1mmol/l pH<7.3 or <15mmol HCO3-
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What is the treatment for DKA?
- in an emergency ABCDE - 1st line always fluid (dehydration is most likely cause of death) - then insulin (+ glucose and postassium)
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What are the potential complications of DKA?
- cerebral oedema - adult respiratory distress syndrome - thromboembolism - aspiration pneumonia (drowsy/comatose patients) - death
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Why can insulin treatment for DKA cause hypokalaemia and why is this dangerous?
insulin decreases potassium levels in the blood by redistributing K+ into the cells via increased Na/K pump activity causing low serum K+ levels --> hypokalaemia low levels of K+ can cause arrhythmia, weakness (as the heart and muscles can struggle to contract)
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What is turner's syndrome?
when a female has a single X chromosome, making them 45 XO
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What are the main features seen in Turner's syndrome?
short stature webbed neck high arching palate downward sloping eyes with ptosis broad chest with widely spaced nipples cubitus valgus underdeveloped ovaries with reduced function late or incomplete puberty most women are infertile
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What are some conditions associated with Turner's syndrome
Recurrent otitis media Recurrent urinary tract infections Coarctation of the aorta Bicuspid aortic valve Hypothyroidism Hypertension Obesity Diabetes Osteoporosis Various specific learning disabilities
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What is the management for Turner's syndrome?
growth hormone therapy (to prevent short stature) oestrogen and progesterone replacement fertility treatment management of secondary conditions
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