What is the role of 24-hour urine collection in the workup of renal artery stenosis (RAS)?

Updated: Nov 02, 2020
  • Author: Bruce S Spinowitz, MD, FACP; Chief Editor: Vecihi Batuman, MD, FASN  more...
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Perform a 24-hour urine collection, or obtain a protein-creatinine ratio on a random void urine specimen, to more accurately assess the level of renal dysfunction and to measure the degree of proteinuria. Vascular renal disease is more often associated with minimal-to-moderate degrees of proteinuria; levels rarely reach the nephrotic range.

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