A physician is treating a patient exhibiting symptoms of impaired renal function following a massive hemorrhage.The physician orders a serum sodium and a PAH clearance test.The patient has a serum PAH of 1.0 mg/dL,urine PAH of 200 mg/dL,and a urine volume of 240 mL in 2 hours.The serum sodium is decreased.
-Using the information provided,based on the tests ordered,what renal function is the physician's primary concern?
A) Glomerular filtration
B) Tubular reabsorption
C) Tubular secretion
D) Renal blood flow

Question

Quizplus · Accepted Answer

The PAH (para-aminohippuric acid) clearance test is specifically used to measure renal plasma flow, which is closely related to renal blood flow. PAH is almost completely cleared from the blood by the kidneys in a single pass, making it an excellent marker for assessing renal blood flow. The concern for impaired renal function following a massive hemorrhage would logically lead to an assessment of renal blood flow, as hemorrhage can significantly impact blood volume and pressure, thereby affecting the kidneys' ability to receive and filter blood.

A Physician Is Treating a Patient Exhibiting Symptoms of Impaired