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A Valve at the Bladder Outlet
Author(s) -
O'ROURKE D. A.
Publication year - 1973
Publication title -
australian and new zealand journal of surgery
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.111
H-Index - 51
eISSN - 1445-2197
pISSN - 0004-8682
DOI - 10.1111/j.1445-2197.1973.tb06804.x
Subject(s) - medicine , cadaver , urology , mechanism (biology) , urinary bladder , posterior urethral valve , anatomy , urine , neck of urinary bladder , surgery , urinary system , philosophy , epistemology
A valve‐like mechanism at the outlet of the urinary bladder in human and dog cadaver specimens is described. Elevation of the bladder base closes the valve and maintains continence. Lack of support or funnelling of the bladder base allows the urine to pass. This valve requires only a few millimetres of tissue beyond the bladder wall to stay effective. Furthermore, three millimetres is the traverse up or down which decides between continence and incontinence of urine. This valve effect is not present in sheep, pig or cattle bladders. The mechanism was described by Vincent in human bladders in 1959.