Renal Flashcards
Cystitis
Bladder and urethra infection (lower urinary tract)
Pyelonephritis
Renal pelvis and kidney infection (upper urinary tract)
Important things which UTI in kids may indicate
Structural abnormality in UT.
Can lead to scarring, predisposing kids to HTN, impaired GFR and renal failure.
Symptoms indicating pyelonephritis
HIGH GRADE Fever Bacteriuria Systemically unwell - maliase Septicaemia illness Vomiting Loin/abdo pain in older children Jaundice and failure to thrive in infants
Clinical features of a UTI in infants
Lethargy Vomiting Poor feeding Failure to thrive Irritability Jaundice Offensive urine
Clinical features of a UTI in children
Dysuria Frequency Abdo or loin pain Cloudy urine or haematuria Lethargy Vomiting
Microscopy of UTI
Bacteriuria and pyuria (bacteria and pus in urine)
Investigations for UTI
Urine dip = WCC and nitrates +
Clean voided urine sample MSC or suprapublic aspiration.
USS if 1st incidence of a UTI for structural abnormality
Micturating cystourethrography for vesicoureteral reflex
DMSA scan for renal scarring
More thorough Ix if under 6months.
Ix for vesicoureteric reflex
Micturating cystourethrogram
Thorough Ix for under 6months babies or recurrent UTI
USS
Micturating cystourethrography
DMSA scan
Rx for cystitis
If under 3months = amoxicillin and gentamicin. 3m-15yrs = Trimethoprim PO . Good fluid intake. Avoid constipation. Clean perineum front to back. Complete voiding.
Rx for pyelonephritis
If under 3months refer to specialist care.
3m-15yrs = oral trimethoprim plus gentamicin if v ill.
Good fluid intake.
Avoid constipation.
Clean perineum front to back.
Complete voiding.
Rx for UTI in <3months
IV amoxicillin and gentamicin.
Physiology causes of increased interstitial fluid
Inadequate lymph drainage (lymphoedema)
Poor venous drainage or increased venous pressure (VTE)
Low oncotic pressure from low proteins e.g. albumin (nephrotic syndrome)
Salt and water retention (Heart failure)
Triad of features in nephrotic syndrome
Heavy proteinuria (3+ on dip)
Hypoalbuminemia (<25g/l)
Oedema
Blood results of nephrotic syndrome and where is the oedema?
Hypoalbuminaemia
Hyperlipidaemia
Low Calcium
Periorbital oedema, worse in morning.
Types of nephrotic syndrome
Congenital
Steroid sensitive
Steroid resistant
Features indicating a steroid sensitive nephrotic syndrome
Normal BP
No macroscopic haematuria
Normal renal function
Responds to steroid Rx
Mostly Minimal change disorder on histology.
Patient likely to be: male, 2-5yrs, Asian.
Features suggestive of steroid resistant nephrotic syndrome
High BP Haematuria Impaired renal function May have features of nephritis Unresponsive to steroids Underlying pathologies on histology e.g. glomerulonephritis.
Rx of steroid sensitive nephrotic syndrome
Prednisolone with tapering dose after 4weeks.
Rx for steroid resistant nephrotic syndrome
Diuretic, ACEi (Enalapril), salt restriction and fluid balance.