concentration-dilution test

concentration-dilution test

[‚kän·sən′trā·shən də′lü·shən ‚test]
(pathology)
A renal function test to measure the ability of the kidney to concentrate and dilute urine under stress; specific gravity for urine from a normal kidney fluctuates from 1.030 on a restricted fluid intake to 1.003 on a high water intake.