washout test

wash·out test

a means of estimating renal obstruction by the rate of disappearance of excreted radioactive material from the kidney.

washout test

Nephrology A method for estimating renal obstruction, based on the time needed for a radioactive substance to be completely cleared–'washed out' from the kidneys
References in periodicals archive ?
The single breath nitrogen washout test which includes the closing volume measurement, is performed with a demand valve, or reservoir bag, a pressure differential or other type pneumotachograph, microprocessor or chart recorder, and a nitrogen analyzer.
Washout tests conducted on the Pro Star Wheel Bearing Grease found a washout rate that's approximately half that of traditional grease--good news considering a boat trailer loses about 8 percent of traditional grease each time it's dunked into the water.