Nephrology ABIM questions with correct answers

Creatinine limitations include? Correct Answer-- age, gender, race, diet, and metabolism - Low muscle mass → disproportionately low serum creatinine and overestimation of GFR −GFR may be <50% normal before serum creatinine ↑ Newer marker of GFR Correct Answer-Cystatin C CKD-EPI equation→ most accurate when Correct Answer-GFR is normal/mildly reduced * performs better at higher (normal) values of glomerular filtration rate. Cockroft-Gault and MDRD equations → most accurate with ? Correct Answer-stages 3 to 5 chronic kidney disease Urine pH >7.0 Correct Answer-−Distal RTA (type I RTA) −Infection with Proteus, Klebsiella or Pseudomonas species Renal Glycosuria Correct Answer-- Think proximal RTA (type II RTA) when glucose is normal - Can be "physiologic" in pregnanc when dipstick is positive for blood in absence of RBCs think about? Correct Answer-Rhabdomyolysis