Fishberg concentration test
(fĭsh′bərg)- A test of renal water conservation in which urine samples are collected after the individual has abstained from fluids overnight and the specific gravity of the urine is measured.
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The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.