Which of following formula denotes free water clearance?
Urine flow rate multiplied by osmolal clearance
Urine flow rate minus osmolal clearance
Urine flow rate divided by osmolol clearance
Urine flow,rate plus osmolal clearance
Ans. is'b'i.e., Urine flow rate minus osmolal clearanceFree water clearance (CH2O):CH2O = V- Cosm