Paediatrics II Flashcards
Biochemical features of DKA
Hyperglycaemia (or history of diabetes)
Ketonaemia
Metabolic acidosis
Dehydration
Presentation of DKA
Polyuria
Polydipsia
Nausea + vomiting
Weight loss
Acetone smell to breath
Dehydration –> hypotension
Altered consciousness
Symptoms of underlying trigger e.g. sepsis
Diagnosis of DKA
Hyperglycaemia (>11mmol/L)
Ketosis (>3mmol/L, or >2+ on dipstick)
Acidosis (Venous pH <7.3, bicarbonate <15.0mmol/L)
Electrochemical imbalances in DKA
Mildly raised creatinine - sign of dehydration
Low bicarbonate - metabolic acidosis
Fluid management of DKA
0.9% NaCl (not dextrose) - give fluid bolus of 20ml/kg if in shock, 10ml/kg if not in shock
Given IV if N+V, or if clinically dehydrated
Correct dehydration over 48 hours
Further management of DKA
Give insulin after 1 hour of IV fluids: 0.1unit/kg/hour
Treat underlying triggers
Give IV dextrose once blood glucose <14mmol/L
Add potassium to IV fluids + monitor closely (40mmol/L)
How to calculate maintenance fluids in a child
First 10kg: 100ml/kg/day
10-20kg: 50ml/kg/day
>20kg: 20ml/kg/day
How to calculate fluid deficit in children
% dehydration x weight (kg) x 10
How to calculate hourly fluid requirements in children
= (fluid deficit-bolus given)/48 + maintenance hourly rate
NB: do not substract bolus given if given for shock
Fluid bolus use in children
20ml/kg of normal saline
In ?DKA, and HF, use 10ml/kg ue to fluid overload complications
Turner syndrome
Single X chromosome –> 45XO
Features of Turner syndrome
Short stature
Webbed neck
High arching palate
Downward sloping eyes with ptosis
Broad chest + widely spaced nipples
Cubital valgus
Multiple pigmented naevi
Underdeveloped ovaries with reduced function
Late or incomplete puberty
Most women are infertile
Conditions associated with Turner syndrome
Otitis media
UTIs
Coarctation of the aorta
Hypothyroidism
Hypertension
Obesity
Diabetes
Osteoporosis
LDs
Management of Turner syndrome
Growth hormone therapy - used to prevent short stature
Oestrogen + progesterone to help establish female secondary sex characteristics, regulate menstrual cycle and prevent osteoporosis
Fertility treatment
Definition of juvenile idiopathic arthritis
Group of chronic inflammatory arthritis diseases beginning before age of 16
Joint arthritis >6 weeks
Arthritis - swelling or effusion, increased warmth and/or painful limited movement +/- tenderness
Risk factors for JIA
Female
<6 years old
HLA polymorphisms
FHx autoimmunity
Presentation of JIA
Joint pain/swelling
May have fever - commonly observed in systemic-onset JIA
Morning stiffness
Limp
Limited movement
Rash - common in SoJIA, salmon-coloured on trunk + proximal ectremities. Or psoriatic rash if psoriatic arthritis
Enthesitis
Uveitis
Rheumatoid nodules
Imaging for JIA
Ultrasound - often abnormal early in disease. Can be used to identify joints for corticosteroid injection
MRI - may be required if monoarticular disease, useful to view synovial fluid
Phenotypic groups in JIA
Oligoarticular arthritis (arthritis of 4 or fewer joints)
Polyarticular arthritis (arthritis of 5 or more joints)
Active sacroilitis
Active enthesitis
Systemic-onset JIA
Management of polyarticular JIA
1st line = DMARD e.g. methotrexate (+ folic acid), or sulfasalazine
Consider biological therapy alongside DMARD e.g. TNF-alpha inhibitor (etanercept, adalimumab)
Consider NSAIDs
Consider intra-articular steroid injection (done under USS), or oral corticosteroids
Key information for oligoarticular JIA
4 joints or fewer
Most common form of JIA
Affects medium-sized joints e.g. knees + elbows
Most common in girls <6
Associated with anterior uveitis
Highest association with antinuclear antibody
Management of oligoarticular JIA
1st line = intra-articular corticosteroid
Consider: NSAIDs, methotrexate, TNF-alpha factor, oral corticosteroids
Management of active sacrolitis/active enthesitis JIA
1st line = NSAIDs
Consider: oral corticosteroids, sulfasalazine or TNF-alpha (methotrexate also in enthesitis)
Management of systemic-onset JIA
1st line: Oral or IV corticosteroid
Consider: NSAIDs, biological therapy e.g. tocilizumab
Eye condition associated with JIA
Chronic anterior uveitis
Can be seen prior to, or after JIA
Children with JIA screened on a 3 monthly basis
What is Stevens-Johnson syndrome/toxic epidermal necrolysis
Skin disorder
Immune-complex mediated hypersensitivity reaction
Typically a reaction to drugs
Less severe version of toxic epidermal necrolysis (>10% body coverage)
Causative agents of SJS
Medications:
- Anti-epileptics
- Antibiotics
- Allopurinol
- NSAIDs
Infections:
- HSV
- Mycoplasma pneumonia
- Cytomegalovirus
- HIV
Presentation of SJS/TEN
Start with non-specific symptoms: fever, cough, sore throat, mouth + eyes, and itchy skin
Develop a purple/red rash –> spreads + blisters
Skin then starts to break away + shed
Pain, erythema, blistering + shedding can also happen to lips + mucous membranes
Eyes can become inflamed and ulcerated
Can affect urinary tract, lungs +- internal organs
Management of SJS/TEN
Emergency –> admit to dermatology or burns unit
Supportive care - nutrition, antiseptics, analgesia, ophthalmology input
Treatment options: steroids, immunoglobulins, immunosuppressant medication
Complications of SJS/TEN
Secondary infection
Permanent skin damage
Visual complications –> scarring + blindness
Characteristics of juvenile myoclonic epilepsy
Myoclonic seizures = sudden brief muscle contractions, patient usually awake during episode
Common triggers include sleep deprivation + alcohol withdrawal (often have jerks in the hours after waking up)
10-20 years at onset
Can have periods of absence which disrupt schooling
Management of juvenile myoclonic epilepsy
1st line = sodium valproate
1st line in girls = levetiracetam
Management of absence seizures
1st line = ethosuximide (or sodium valproate)
Most stop having them as they get older
Investigation of seizures/epilepsy in children
Request an EEG - helps categorise type + severity
Head MRI/CT - if unclear history, or atypical features
Causative agent of chickenpox
Varicella zoster virus
Presentation of chickenpox
Widespread, erythematous raised, vesicular, blistering lesions
Starts on trunk or face –> spreads outwards –> affects whole body over 2-5 days
Eventually lesions scab over –> no longer contagious
Fever = often first symptom
Itch
General fatigue + malaise
Complications of chickenpox
Bacterial superinfection - avoid NSAIDs
Dehydration
Conjunctival lesions
Pneumonia
Encephalitis (presents as ataxia)
DIC
Progressive disseminated disease
Management of chickenpox
Keep cool, trim nails
Calamine lotion
School exclusion
Infectivity of chickenpox
Spread through direct contact with lesions, or through infected droplets from cough/sneeze
Become symptomatic 10 days-3 weeks after exposure
Stop being contagious once lesions have crusted over
Bacterial superinfection of chickenpox
NSAIDs may increase risk
Most commonly caused by invasive group A streptococcal species –> soft tissue infections –> necrotising fasciitis
Presentation of Wilms tumour
Consider in child <5 presenting with mass in abdomen (occurs 2-5 years old)
Unilateral, painless, abdominal/flank mass
Abdominal pain/distension
Haematuria
Lethargy
Fever
Hypertension
Weight loss
Investigation of Wilms tumour
USS abdomen with doppler - visualise kidney
CT/MRI - staging of tumour
Biopsy to identify histology required for definitive diagnosis
Management of Wilms tumour
Surgical excision of tumour + nephrectomy
Adjuvant treatment depends on staging + histology: chemotherapy, or radiotherapy
Inheritance of Noonan syndrome
Majority are autosomal dominant
Features of Noonan syndrome
Short stature
Broad forehead
Downward sloping eyes with ptosis
Hypertelorism (wide space between eyes)
Prominent nasolabial folds
Low set ears
Webbed neck
Widely spaced nipples
Conditions associated with Noonan syndrome
Congenital heart disease - especially pulmonary valve stenosis, hypertrophic cardiomyopathy + ASD
Cryptoorchidism (normal fertility in women)
LD
Bleeding disorders
Lymphoedema
increased risk of leukaemia + neuroblastoma
Features of Kallman syndrome
Delayed onset of puberty is main presenting features e.g. small penis, reduced testicle size, no facial or body hair in males
Anosmia
Poor balance
Learning difficulties
Kleinefelter syndrome genetics
Male with additional X chromosome –> 47XXY
Can have even more X chromosomes –> more severe features
Features of Kleinfelter syndrome
Appear as normal males until puberty
At puberty –>
Taller height
Wider hips
Gynaecomastia
Weaker muscles
Small testicles
Reduced libido
Shyness
Infertility
Subtle LD (speech + language in particular)
Management of Kleinfelter syndrome
Testosterone injections
Advanced IVF may allow fertility
Breast reduction surgery
MDT e.g. SALT, OT, Physio for muscle weakness, educational support
Risk factors for GBS infection in neonates
Premature rupture of membranes
Preterm delivery
Maternal fever during labour
Chorioamnionitis
Siblings had previous GBS infection
Maternal age <20 years
hHeavy maternal colonisation (bacteriuria)
Management of GBS infection in neonates
Benzylpenicillin/ampicillin + gentamicin
If >1 month old –> cefotaxime or ceftriaxone instead
14-21 days of treatment if meningitis, 10 days otherwise
Vancomycin + gentamicin if penicillin allergy
Triad of features in shaken baby syndrome
Retinal haemorrhages
Subdural haematoma
Encephalopathy
Red features in child with fever - colour
Pale, mottled, ashen or blue
Red features in child with fever - activity
No response to social cues
Appears ill to professional
Does not wake, or, if roused, des not stay awae
Weak, high-pitched or continuous cry
Red features in child with fever - respiratory
Grunting
Tachypnoea: RR >60 in any age
Moderate or severe chest indrawing
Red features in child with fever - circulation + hydration
Reduced skin turgor
Red features in child with fever - other
Age <3 months, with temperature >/= 38
Non-blanching rash
Bulging fonatanelle
Neck stiffness
Status epilepticus
Focal neurological signs/seizures
Amber tachypnoea in a child with fever
6-12 months >50 breaths per minute
>12 months >40 breaths per minute
Amber tachycardia in a child with fever
<12 months >160bpm
12-24 months >150bpm
2-5 years >140 bpm
What is idiopathic thrombocytopenic purpura
Type II hypersensitivity reaction
Antibodies target + destroy platelets
Key differential of a non-blanching rash
Presentation of idiopathic thrombocytopenic purpura
Usually presents in children <10
History of recent viral ilness common
24-48 hour onset of symptoms
Bleeding e.g. gums, epistaxis, menorrhagia
Bruising
Petechial or purpuric rash
Investigation in idopathic thrombocytopenic purpura
FBC –> low plately count, other values should be normmal
Blood film
Bone marrow examination if there are atypical features
Management of idiopathic thrombocytopenic purpura
Usually no treatment required - tends to resolve within 6 months
Avoid activites that may result in trauma
If platelets <10, or active bleeding –>
- Prednisolone (commenced by a specialist)
- IVIG
- Blood transfusion if required
- Platelet transfusion (only works temporarily)
Avoid NSAIDs, aspirin and contact sports
Splenectomy required if life-threatening bleeding, or ITP with severe symptoms for 12-24 months
What is biliary atresia
Congenital condition of narrowing/absence of section of bile duct –> cholestasis
Presentation of biliary atresia
Typically presents in first few weeks of life
Significant jaundice (high conjugated bilirubin)
Growth + feeding disturbance
Hepatomegaly with raised liver transaminases (GGT>others)
Dark urine + pale stools
Management of biliary atresia
Surgery
May require full liver transplantation
Antibiotic coverage + bile acid enhancers following surgery
Pathophysiology of vesicoureteric reflux
Ureters displaced laterally –> enter bladder more perpendicular
Shortened intramural course of the ureter
Vesicoureteric junction cannot therefore function adequately
Presentation of vesicoureteric reflux
Antenatally: hydronephrosis on USS
Recurrent childhood UTIs
Reflux nephropathy
- Chronic pyelonephritis secondary to VUR (commonest cause)
- May have hypertension (increased renin due to renal scarring)
Investigation of vesicoureteric reflux
Micturating cystourethrogram
DMSA scan may be used to look for renal scarring
Triad of nephrotic syndrome
Hypoalbuminaemia
High urinary protein
Oedema
Presentation of nephrotic syndrome
Commonly aged 2-5 years old
Frothy urine
Generalised oedema
Pallor
High blood pressure
Deranged lipid profile: high cholesterol, triglycerides + LDLs
Hypercoagulability
Causes of nephrotic syndrome
Most common in children = minimal change disease
Intrinsic kidney disease
- Focal segmental glomerulosclerosis
- Membranoproliferative glomerulonephritis
Systemic illness
- Henoch schonlein purpura
- Diabetes
- Infection e.g. HIV, hepatitis, and malaria
Investigations in minimal change disease
Renal biopsy + microscopy –> usually shows no change
Urinalysis: small molecular weight proteins, hyaline casts