a test for renal function: the patient drinks 1500 mL of water on an empty stomach; if the patient was not dehydrated beforehand and the kidneys are normal, this fluid will be excreted by the end of 4 hours with specific gravity of the urine ranging from 1.001-1.004.
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Volhard,Franz, German physician, 1872-1950.
Volhard test - for renal function.
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