Given the following information,calculate the patient's free water clearance: urine volume-360 mL in 12 hours,urine osmolality-1400 mOsm,and plasma osmolality-275 mOsm
A) +0.5 mL/min
B) -1.5 mL/min
C) -1.0 mL/min
D) -2.0 mL/min

Question

Quizplus · Accepted Answer

Free water clearance (C_H2O) is calculated using the formula: C_H2O = V - (U_osm * V / P_osm), where V is urine flow rate, U_osm is urine osmolality, and P_osm is plasma osmolality. First, convert urine volume to mL/min: 360 mL/720 min = 0.5 mL/min. Then, calculate C_H2O: 0.5 - (1400 * 0.5 / 275) = 0.5 - 2.545 = -2.045 mL/min, which rounds to -2.0 mL/min.

Given the Following Information,calculate the Patient's Free Water Clearance: Urine