Role of the transversus perinei profundus muscle on voiding: The meaning of UPmax in patients with paralyzed urethral sphincter

Eiji Iwatsubo, Yasuki Sakamoto, Masatoshi Eto, Joichi Kumazawa

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Urodynamic study of 66 patients with caudal injury and of 7 patients who underwent saddle block was evaluated by putting emphasis on the maximal pressure of the urethra (UPmax). The static pressure of 49.7 ± 10.8 cm H2O in the membranous urethra of the patients with completely paralyzed sphincter raised the question that some active muscle that functions to open the membranous urethra must have been working during physiological urination. Urodynamic findings of detrusor sphincter relationship, monitored by pressure and electromyogram (EMG) measurement, suggested that the combined reflections of the pelvic floor muscle and urethral sphincter are present. We concluded that this would be induced by the transversus perinei profundus muscle contraction and the urodynamic interpretation would be re-integrated on the role of this muscle on active urethral opening mechanism.

Original languageEnglish
Pages (from-to)169-175
Number of pages7
JournalNeurourology and Urodynamics
Volume15
Issue number3
DOIs
Publication statusPublished - May 20 1996
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Clinical Neurology
  • Urology

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