Renal Extra Flashcards
Fluid in resus in AKI
Saline
Hartmanns contains potassium
Often hyperkalaemic in AKI therefore not a good idea
Normal anion gap -
normally 10-18
Causes of metabolic acidosis + increased anion gap
Increased production or reduced excretion of fixed/organic acids
Lactic acid (sepsis, tissue ischaemia)
Urate (renal failure)
Ketones (DKA)
Drugs/toxins (salicylates, methanol, ethylene glycol)
Causes of metabolic acidosis + normal anion gap
Either loss of bicarb or accumulation of H+ eg. renal tubular acidosis diarrhoea Addissons Fistula
Minimal change disease - acute or progressive onset
Acute onset - therefore not chronic renal failure
Membranous nephropathy - acute or progressive onset
Progressive - chronic not acute renal failure
Type of dialysis for diabetic patients
Haemodialysis because peritoneal contains glucose
Also more prone to infection at PD sites
Biochemical picture of AKI vs CKD
Calcium and phosphate will be high in AKI due to haemoconcentration (if due to dehydration)
Whereas CKD get hypocalcaemia and then - PTH high from secondary hyperPTH
CKD also get anaemia due to erythropoeitin and iron deficiency
V.high urea and moderately high creatinine - AKI
V.high urea in CKD will also have v.high creatinine
Rapid decrease in renal function after starting an ACEi
Suspect renal artery stenosis
Cause of nausea and itching in CKD and how to deal with it
High phosphate - therefore give calcichew and sevelamer - will also raise calcium
Sevelamer more effective than calcichew and is used in stage 4 + 5 CKD
Hb target for CKD
10-12 g/dl
Low citrate causes what type of renal stones
Calcium oxalate - citrate in the urine inhibits the formation of renal stones especially calcium oxalate
Cramp post haemodialysis
Too much water being removed
What is used to measure dialysis adequacy - which formula
URR urea reduction ratio
Albumin needed for nephrotic syndrome diagnosis
Below 25