Measurement of Unilateral Renal Function by External Ureteral Compression.

A SIMPLE, nonhazardous technic for unilateral urine sampling was described recently.' Occlusion of one ureter by pressure applied to the anterior abdominal wall allowed collection of unilateral urine samples by urinary bladder catheterization. That these urines were unilateral in origin was shown by excretory urography and by the sum of the unilateral urea and creatinine clearances being equal to the control bilateral clearances. Short periods of ureteral occlusion by external compression did not alter renal function. The purpose of this paper is to present results which show that the more complex measurements of unilateral renal function can be made with use of external ureteral compression.