'I1HE JOURNAL OF UROLOGY
Copyright © 1977 by The Williams & Wilkins Co.
AUSCULTATION OF URINARY FLOW WILLIAM E. BRADLEY, BRIAN P. BROCKWAY
AND
GERALD W. TIMM
From the Department of Neurology, University of Minnesota, Minneapolis, Minnesota
ABSTRACT
Urinary flow in the male subject is associated with turbulence at the bladder neck. This turbulence is associated. with the production of a sound in the healthy male subject, transmitted to the perineum. Fluid flow may be characterized as laminar or turbulent. In laminar flow the flow lines are parallel and the cross-sectional velocity of the fluid has a parabolic profile. Fluid velocity is maximum at the center and zero at the conduit wall. Turbulent flow has velocity components parallel to the direction of "'""rsw·"' flow but also contains random components perpendicaverage flow. Because of random fluctuations in velocto the average flow localized pressure fluccu.,n1
Copyright © 1977 by The Williams & Wilkins Co.
AUSCULTATION OF URINARY FLOW WILLIAM E. BRADLEY, BRIAN P. BROCKWAY
AND
GERALD W. TIMM
From the Department of Neurology, University of Minnesota, Minneapolis, Minnesota
ABSTRACT
Urinary flow in the male subject is associated with turbulence at the bladder neck. This turbulence is associated. with the production of a sound in the healthy male subject, transmitted to the perineum. Fluid flow may be characterized as laminar or turbulent. In laminar flow the flow lines are parallel and the cross-sectional velocity of the fluid has a parabolic profile. Fluid velocity is maximum at the center and zero at the conduit wall. Turbulent flow has velocity components parallel to the direction of "'""rsw·"' flow but also contains random components perpendicaverage flow. Because of random fluctuations in velocto the average flow localized pressure fluccu.,n1
