Determination of Osmotic Pressure in Diabetes Insipidus

Abstract

The object of this communication is to report a relatively simple test for the diagnosis of diabetes insipidus: the simultaneous determination of the osmotic pressure of the blood and urine. Diabetes insipidus may be suspected in a patient with polyuria and polydipsia whose urine is consistently of low specific gravity. This syndrome must be differentiated from psychogenic polydipsia with polyuria, "chronic nephritis" and diabetes mellitus. The last two should present no difficulty in differential diagnosis with the aid of ordinary laboratory tests.Certain procedures that aid in the diagnosis of diabetes insipidus are as follows: alleviation of symptoms after the . . .