In the formula for urea clearance, C = U x V/P, what does U stands for:
(A) Urinary concentration in g/24 hour (B) Urinary concentration in mg/ml (C) Urine osmolarity (D) Urine volume per minute
(B) Ans: B. Urinary concentration in mg/ml(Ref: Ganong 25/p p676. 21/c p678)In given formula for measuring GFR:C = Clearance of the substanceU = Urinary concentration of the substance in mg/mlP = Plasma concentration of the substance in mg/mlV = Volume of urine