Paeds 3 (Renal, Derm, ID and Psych) Flashcards
What are the signs symptoms of UTI in children?x9
fever
lethargy
Irritability
Vomiting
Poor feeding
Urinary frequency
dysuria
abdo pain (suprapubic mainly)
incontinence
What signs in addition to UTI signs indicate acute pyelonephritis?
temperature above 38oC
Loin pain or tenderness
What is the management for UTI?
All children under 3 months with a fever should start IV antibiotics immediately (e.g. ceftriaxone) + have a full septic screen, consider LP
Oral antibiotics can be considered in children >3 months if they are otherwise well:
trimethoprim, nitrofurantoin, cefalexin, amoxicillin
What are the lifestyle modifications/preventative measures against UTI? x4
High fluid intake
Regular voiding
Prevent or treat constipation
Good perineal hygiene
What are the investigations for UTI?
MSU (difficult in young children)
clean catch - recommended method
urine collection pads
catheter samples or suprapubic aspiration
What are the important factors on MSU and what do they indicate?
Nitrites - suggestive of bacteria in the urine as they break down nitrates to nitrites
Leukocytes - significant rise can indicate infection or other cause of inflammation
Nitrites are a better indication of infection than leukocuytes
If both are present or nitrites are present the patient should be treated as a UTI but not if only leukocytes are present
Which bacteria most commonly cause UTIs?
E. coli
Proteus is more common in boys
Pseudomonas may indicate structural abnormality
What are some signs which indicate an atypical UTI?
- seriously ill or septicaemia
- poor urine flow
- abdominal or bladder mass
- raised creatinine
- failure to respond to suitable antibiotics within 48
hours - infection with atypical (non-E. coli) organisms.
What is enuresis?
involuntary urination
diurnal enuresis = inability to control bladder function during the day
nocturnal enuresis = bedwetting at night
What are the normal ages at which children have control of day and nighttime urination?
daytime urination by 2 yrs
nighttime urination by 3-4 yrs
What is the difference between primary and secondary nocturnal enuresis?
primary means that the child has never managed to be consistently dry at night
secondary is when a child begins wetting the bed following having been dry for at least 6 months
What are the potential causes of primary nocturnal enuresis? x6
MC: developmental delay
overactive bladder
fluid intake before bedtime (particularly diuretics like fizzy drinks, juice and caffeine)
Failure to wake + underdeveloped bladder signals
Psychological distress
Secondary causes e.g. constipation, UTI, learning disability or cerebral palsy
What are the causes of secondary nocturnal enuresis x5
Urinary tract infection
Constipation
T1 Diabetes
New psychosocial problems
Maltreatment
What are some risk factors for nocturnal enuresis? x6
Male
Affected 1st degree relative
Learning disability
Emotional stress
Developmental delay
Abuse or neglect
What are the management steps for nocturnal enuresis?
Initial priority is to identify underlying cause - 2 week diary of toileting, fluid intake and bedwetting episodes can be helpful to establish any patterns
Reassurance is also a key part of management as most cases will resolve without medical intervention
Lifestyle changes - reduced fluid intake in evenings, pass urine before bed
Encouragement and positive reinforcement - avoid blame or shame
Treat any underlying causes or exacerbating factors e.g. constipation
Enuresis alarms (device which makes a noise at first sign of bed wetting, waking the child and stopping them from urinating)
Pharmacological treatment (desmopressin and oxybutinin)
What is the pharmacological treatment for nocturnal enuresis?
Desmopressin (a synthetic form of ADH acts by reducing the volume of urine produced by the kidneys)
Oxybutinin is an anticholinergic medication which reduces the contractility of the bladder and can be used when there is an overactive bladder causing urge incontinence
Imapramine is a TCA and has been shown to help relax the bladder and lighten sleep
What is the main test used to assess renal function in children?
plasma creatinine concentration
Which radiological investigations are used to assess the kidneys and urinary tract in children? x5
USS (anatomical assessment but not function - useful for UT dilatation, stones and nephrocalcinosis)
DMSA scan - detects dunctional defects e.g. scar tissue
MCUG - visualises bladder and urethral anatomy, detects VUR and urethral obstruction
MAG3 renogram - measures drainage, used to identify VUR in older children
Abdo x-ray - identifies spinal abnormalities and may identify renal stones
What are some congenital renal abnormalities seen in children? x8
Renal agenesis (absence of both kidneys which is fatal)
Multicystic dysplastic kidney (results from the failure of union of the ureteric bud)
Autosomal recessive/dominant polycystic kidney disease (cause large cystic kidneys which cause problems in adulthood)
Pelvic/horseshoe kidneys (lower poles of kidneys fuse at the midline)
Premature division of the ureteric bud
Duplex kidney
Bladder exstrophy
Prune-belly syndrome (absent musculature sydrome)
Posterior urethral valves (tissue at the proximal end of the urethra which causes obstruction of urine output)
What is true phimosis?
when the foreskin is pathologically non-retractile
What is the commonest condition which gives rise to a true phimosis?
balanitis xerotica obliterans (BXO) - causes progressive scarring of the foreskin which can extend into the glans, meatus and ultimately the urethra
What is paraphimosis?
a retracted foreskin which cannot be reduced and can result in compromise of the blood supply to the glans
- emergency treatment is needed to reduce the foreskin
What is the definition of and classic triad of features seen in shaken baby syndrome?
Intentional shaking of a child (0-5 years old)
Classic triad:
retinal haemorrhages
subdural haematoma
encephalopathy
What is a cephalohaematoma?
a bleed occurring between the periosteal membrane and cranial bone which typically develops several hours after birth and doesn’t cross suture lines. It can take months to resolve.
What is included in the 6-1 vaccine and at what ages are the 3 doses given?
Diptheria, pertussis, polio, tetanus, Haemophilus influenza b and hepatitis B
Given at 8, 12 and 16 weeks
What is tested for in neonatal blood spot screening? And when is the test performed?
Congenital hypothyroidism
Cystic Fibrosis
Sickle cell disease
Phenylketonuria
Medium chain acyl-CoA dehydrogenase deficiency
Maple syrup urine disease
Isovaleric acidaemia
Glutaric aciduria type 1
Homocystinuria
Performed at 5-9 days of life
What risk factors would be indications for adrenaline auto-injector use to treat generalised allergic reactions?
Asthma requiring inhaled steroids
Poor access to medical treatment
Adolescents at higher risk
Nut or insect sting allergies are higher risk
Significant co-morbidities e.g. cardiovascular disease
What are salmon patches? character and location, cause, and prognosis?
also known as stork bites or angel kisses
small pink or red patches found between a baby’s eyes or on their eyelids, upper lip and back of the neck
caused by a concentration of immature blood vessels and may be more visible when the baby is crying
normally fade and disappear completely
What are mongolian blue spots/congenital dermal melanocytosis?
character and location, cause, and prognosis?
blue, grey or purple coloured areas
most commonly found on the baby’s lower back and buttocks
caused by a concentration of pigmented cells
usually disappear in the 1st 4 years of life
What are strawberry haemangiomas?
character and location, cause, and prognosis?
bright or dark red, raised or swollen, bumpy area which looks like a strawberry
mostly occur on the head and develop within the 1st 2 months of life
formed by a concentration of tiny, immature blood vessels
often grow in size for a few months and then slowly start to fade, almost all disappear by age 9
What are port-wine stains?
character and location, cause, and prognosis?
flat, pink, red or purple colour birthmarks which vary in size
usually found on the head or neck
caused by a concentration of tiny, dilated capillaries
do not disappear over time and may become darker and thicker as a child gets older, can be linked to more serious problems
What are cafe au lait spots?
character and location, cause, and prognosis?
flat, hyperpigmented birthmarks found anywhere on the body
caused by a collection of pigment-producing melanocytes in the epidermis of the skin
Multiple of these birth can be a sign of neurofibromatosis type 1
What is the definition of AKI?
A sudden, potentially reversible inability of the kidney to maintain normal body chemistry and fluid balance.
What is the hallmark sign of AKI in children?
recent increase in creatinine greater than 1.5x previous result
or a value greater than 1.5x upper limit of the reference interval for age
What are some prerenal causes of AKI?
MC cause in children - result of reduced blood flow to kidney
–> drop in GFR
SHOCK + HYPOVOLAEMIA (fluid loss) resulting from:
gastroenteritis (D+V –> volume loss)
burns
sepsis
haemorrhage
nephrotic syndrome
What are some renal causes of AKI?
VASCULAR
haemolytic uraemic syndrome (MC)
vasculitis
embolus
renal vein thrombosis
TUBULAR
acute tubular necrosis
ischaemic
toxic - drugs
obstructive
GLOMERULAR
glomerulonephritis
INTERSTITIAL
interstitial nephritis
pyelonephritis
Which drugs are nephrotoxic and known to cause intrarenal disease?
NSAIDs (inhibits COX which causes excess vasoconstriction of afferent arteriole)
Aminoglycosides (e.g. gentamycin)
ACE-I/ARBs (results in dilated efferent arterioles decreasing GFR)
What are some post renal causes of AKI?
OBSTRUCTION
congenital e.g. posterior urethral valves
acquired e.g. blocked urinary catheter
What scan should be performed within 24hrs in children with moderate/severe AKI?
urinary tract USS
What are the principles of management of AKI in children?
3Ms
Monitor - regular creatinine bloods, monitoring of hydration and fluid balance using urine output, weight urinalysis and PEWS
Maintain - keeping circulatory volume and perfusion pressure stable
Minimise - review, adjust and monitor meds that may affect renal function adversely e.g. NSAIDs, ACEIs, ARB, aminoglycosides and calcineurin inhibitors, avoid contrast
What are the most common causes of chronic kidney disease in children? x8
MC: renal dysplasia +/- reflux
obstructive uropathy
glomerular disease
congenital nephrotic syndrome
tubulointerstitial diseases
renovascular disease
polyscystic kidney disease
metabolic causes
What are the key clinical manifestations of stage 4/5 CKD in children?
anorexia and lethargy
polydypsia and polyuria
faltering growth/ growth failure
Bony deformities from renal osteodystrophy (renal rickets)
Hypertension
Acute-on-chronic renal failure (precipitated by infection or dehydration)
Incidental finding of proteinuria
Unexplained normochromic, normocytic anaemia
What are the management priorities for CKD in children?
Aims are to prevent symptoms and metabolic abnormalities, to allow normal growth and development and preserve residual renal function
Diet - anorexia and vomiting are common symptoms so caloric supplements and nasogastric or gastrostomy feeding are often needed to optimise growth
Control of salt and water balance and acidosis - salt supplements and free access to water, bicarbonate supplements to prevent acidosis
Anaemia - reduced production of erythropoeitin and circulation of metabolites which are toxi to the bone marrow result in anaemia
What are the stages of CKD and eGFR values?
1 >90 Normal or increased GFR with other evidence of renal damage e.g. structural abnormality or persistent haematuria/proteinuria
2 60–89 Slight decrease in GFR but mostly asymptomatic
3 A - 45–59, 3 B - 30–44 = Moderate decreased GFR with or without evidence of other renal damage
4 15–29 Severely decreased GFR with or without evidence of renal damage
5 <15 Established renal failure - renal replacement therapy required
Which metabolic abnormalities can result from AKI? x3 and what are the treatments?
metabolic acidosis - sodium bicarb
hyperphosphataemia - calcium carbonate + dietary restriction
hyperkalaemia - calcium gluconate (if ECG changes), salbutamol, calcium exchange resin, glucose + insulin, dietary restriction, dialysis
What is the pathophysiology of nephrotic syndrome?
hyperpermeability of the glomerular basement membrane to protein resulting in protein leakage from the blood into the urine
What are 3 other features seen in nephrotic syndrome in addition to the classic triad?
classic triad = proteinuria, hypoalbuminaemia, oedema
3 other features:
Deranged lipid profile (high levels of cholesterol, triglycerides and low density lipoproteins)
Hypertension
Hyper-coagulability
What is the most common cause of nephrotic syndrome seen in children <10?
minimal change disease (90% of cases)
what are some secondary causes of nephrotic syndrome?
Focal segmental glomerulosclerosis
Membranoproliferative glomerulonephritis
Henloch schonlein purpura
Diabetes
Infection e.g. HIV, hepatitis and malaria
what are some symptoms seen in children with nephrotic syndrome?
Breathlessness (due to pleural effusions and abdo distension)
Infections like peritonitis, septic arthritis, or sepsis (due to loss of protective immunoglobulins in the urine)
Fatigue
Loss of appetite
Pallor
Frothy urine
What is the management for minimal change disease?
corticosteroids +/- cyclophosphamide or cyclosporine (in steroid resistant children)
low salt diet
diuretics to treat oedema
albumin infusion for severe hypoalbuminaemia
What is post-strep glomerulonephritis?
where immune complexes made up of streptococcal antigens, antibodies and complement proteins get lodged in the glomeruli and cause inflammation and AKI
occurs 1-3 weeks after a B-haemolytic strep infection e.g. tonsilitis
What occurs in IgA nephropathy
IgA deposits in the nephrons of the kidneys causing inflammation –> reduced eGFR, haematuria and proteinuria
related to HSP which is an IgA vasculitis
How are nephrotic and nephritic syndrome distinguished?
proteinuria in nephritic syndrome is usually <3.5g per day (within the sub-nephrotic range)
nephrotic syndrome does not usually present with haematuria
What are the clinical features of henloch-schonlein purpura?
characterisitc skin rash on extensor surfaces
arthralgia
periarticular oedema
abdo pain
glomerulonephritis
What is Alport syndrome?
an X-linked recessive disorder which progresses to end-stage chronic kidney disease by early adult life in males and is associated with nerve deafness and ocular defects
caused by a defect in type IV collagen resulting in multi-system effects
What is vesicoureteric reflux?
abnormal backflow of urine from the bladder into the ureter and kidney
ureters are displaced laterally which means that the intramural course of the ureter is shortened and the vesicoureteric junction can’t function properly
What is the gold standard investigation for VUR?
Micturating cystourethrogram (MCUG)
What are the stages of VUR
1 - reflux into ureter only, no dilatation
2 - reflux into the renal pelvis on micturition
3 - mild/moderate dilatation of the ureter, renal pelvis and calyces
4 - dilatation of the renal pelvis and calyces with moderate ureteral tortuosity
5 - gross dilatation of the ureter, pelvis and calyces with ureteral tortuosity
What is the management for VUR?
avoid constipation
avoid excessive bladder filling
prophylactic antibiotics
surgical input from paediatric urology - anti-VUR surgery
What is hypospadias?
A congenital condition where the opening of the urethra is on the underside of the penis.
Thought to arise from failure of development of ventral tissues of the penis so is technically a ventral hypoplasia of the penis.
What are 3 key features of hypospadias?
Ventral urethral meatus, in 80% on the distal shaft or glans penis
Ventral curvature of the shaft of the penis
Hooded appearance of the foreskin - characteristic in appearance but no functional significance
What is the treatment for hypospadias?
referral to paeds specialist for management
mild cases may not require any treatment
Surgery may be performed on functional or cosmetic grounds so that the person can pass urine in a straight line whilst standing and have a straight erection.
Surgery is usually performed in the 1st 2-3 years of life if needed
*Infants with hypospadias must not be circumcised to preserve tissue for reconstruction
What is haemolytic uraemic syndrome?
A triad of acute renal failure, microangiopathic haemolytic anaemia and thrombocytopenia.
What is the difference between typical and atypical HUS?
Typical HUS - good prognosis, diarrhoeal prodrome, long-term follow up required
Atypical HUS - no diarrhoeal prodrome, may be familial, frequent relapses, can be fatal
What causes HUS?
typically secondary to GI infection with verocytotoxin-producing E. coli acquired through contact with farm animals or eating undercooked beef, or, less frequently , shigella.
The Shiga toxin from these organisms enters the GI mucosa and then localises to the endothelial cells of the kidney where it causes intravascular thrombogenesis.
The coagulation cascade is activated and CLOTTING IS NORMAL (different to DIC).
Platelets are consumed in this process and microangiopathic haemolytic anaemia results from damage to red blood cells as they circulate through the microcirculation, which is occluded.
What are the symptoms of HUS? x10
Fever
Abdo pain
Lethargy
Pallor
Reduced urine output
Haematuria
Hypertension
Bruising
Jaundice (due to haemolysis)
Confusion
What are the investigations for HUS?
bloods
stool culture
clinical diagnosis
What is the treatment for HUS?
Medical emergency requiring hospital admission and supportive management :
IV fluids (hypovolaemia)
Anti-hypertensives
Blood transfusions (severe anaemia)
Haemodialysis (severe renal failure)
New treatment - monoclonal anti-terminal complement antibody eculizumab improves prognosis of atypical HUS.
How is candida different to nappy rash?
the rash extends into the skin folds
large red macules
well demarcated scaly border
circular pattern to the rash spreading outwards
satellite lesions (small, similar patches of rash near the main rash)
What is eczema?
chronic atopic condition caused by defects in the normal continuity of the skin barrier, leading to inflammation in the skin.
Severity varies widely and patients experiences flares when eczema is more problematic.
What are some causes of eczema flare ups? x8
- Bacterial infection, e.g. Staphylococcus, Streptococcus spp.
- Viral infection, e.g. herpes simplex virus
- Ingestion of an allergen, e.g. egg
- Contact with an irritant or allergen
- Environment: heat, humidity
- Change or reduction in medication
- Psychological stress
- Unexplained
What are the key features of atopic eczema?
Significant variations in severity/presentations.
Dry, red, itchy and sore patches of skin over the flexor surfaces and on the face and neck.
What is the goal of eczema management?
Key is to create an artificial barrier over the skin to compensate for the defective skin barrier which is done using emollients which are as thick and greasy as tolerated.
Particularly important to use after washing and before bed.
avoid triggers such as sudden changes in temperature, certain dietary products, washing powders and cleaning products.
What is used to treat flare-ups?
thicker emollients, topical steroids, “wet wraps” (covering affected areas in a thick emollient and applying a wrap to keep moisture locked in overnight) and treating any complications such as bacterial or viral infections
What are some examples of creams (thin/thick) used in eczema treatment?
thin:
E45
diprobase
epaderm
thick:
50:50 ointment (liquid paraffin 50%)
hydromol ointment
diprobase ointment
What steroids are used to treat eczema flare-ups? (mild to v potent)
Mild: Hydrocortisone 0.5%, 1% and 2.5%
Moderate: Eumovate (clobetasone butyrate 0.05%)
Potent: Betnovate (betamethasone 0.1%)
Very potent: Dermovate (clobetasol propionate 0.05%)
What is the most common organism causing skin infections in eczema and which antibiotic is used to treat it?
staph aureus
flucloxacillin
What is eczema herpeticum? which organisms cause it?
A viral skin infection caused by herpes simplex virus or varicella zoster virus
Previously known as Kaposi varicelliform eruption
Usually occurs in a patient with a pre-existing skin condition e.g. atopic eczema or dermatitis.
What is the clinical presentation of eczema herpeticum?
widespread, painful, vesicular rash with systemic symptoms e.g. fever, lethargy, irritability and reduced oral intake
What is the management for eczema herpeticum?
aciclovir (mild cases oral, more severe cases IV)
What are Stevens-Johnson syndrome and toxic epidermal necrolysis? what’s the difference?
a type IV hypersensitivity reaction leads to disproportional immune response causes epidermal necrosis, resulting in blistering and shedding of the top layer of skin
SJS and TEN are a spectrum of the same pathology - Generally, SJS affects less that 10% of body surface area whereas TEN affects more than 10% of body surface area.
What are some causes of SJS/TEN?
Medications:
Anti-epileptics
Antibiotics
Allopurinol
NSAIDs
Infections:
Herpes simplex
Mycoplasma pneumonia
Cytomegalovirus
HIV
What are the key symptoms of SJS/TEN?
Non-specific symptoms - fever, cough, sore throat, sore mouth, sore eyes and itchy skin
Purple/red rash develops and starts to blister
Few days later the skin starts to break away and shed leaving raw tissue underneath
pain , erythema, blistering and shedding of lips and mucous membranes
Eyes become inflamed and ulcerated
Can also affect the urinary tract, lungs and internal organs
What is the treatment for SJS/TEN?
Medical emergencies and patients should be admitted to a dermatology or burns unit for treatment.
Good supportive care is essential, including nutritional care, antiseptics, analgesia and ophthalmology input
Steroids, immunoglobulins and immunosuppressant medications