The electromyographic activity of the external and internal urethral sphincters and urinary bladder on vaginal distension and its role in preventing vaginal soiling with urine during sexual intercourse.

The electromyographic activity of the external and internal urethral sphincters and urinary bladder on vaginal distension and its role in preventing vaginal soiling with urine during sexual intercourse. Research Abstract Details 

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The electromyographic activity of the external and internal urethral sphincters and urinary bladder on vaginal distension and its role in preventing vaginal soiling with urine during sexual intercourse. Abstract Text:

Ahmed Shafik,Ali A Shafik,Ismail A Shafik,Olfat El Sibai,

BACKGROUND/AIM: We investigated the hypothesis that external (EUS) and internal (IUS) urethral sphincters and urinary bladder (UB) respond to penile thrusting (PT) of vagina in a way that prevents urinary leakage during coitus. METHODS: Vaginal condom was inflated with air in increments of 50-300 ml and EMG of EUS and IUS and vaginal pressure were recorded; test was repeated after anesthetization of vagina, UB, EUS, and IUS. RESULTS: Vaginal distension effected reduction of vesical pressure but increase of IUS EMG until the 150 ml distension was reached, beyond which more vaginal distension caused no further effect; EUS EMG showed no response. Vaginal distension while vagina, UB, EUS, and IUS had been separately anesthetized, produced no change. CONCLUSION: Vaginal balloon distension appears to effect vesical relaxation and increased IUS tone. This seems to provide a mechanism to avoid urine leakage during coitus and to occur through a reflex we term 'vagino-urethrovesical reflex'.

The electromyographic activity of the external and internal urethral sphincters and urinary bladder on vaginal distension and its role in preventing vaginal soiling with urine during sexual intercourse. Publishing Authors By Initials

A Shafik,AA Shafik,IA Shafik,OE Sibai,

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The electromyographic activity of the external and internal urethral sphincters and urinary bladder on vaginal distension and its role in preventing vaginal soiling with urine during sexual intercourse. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Archives of gynecology and obstetrics

VOLUME: 277

Page Numbers: 213-7

Journal Abbreviation: Arch. Gynecol. Obstet.

ISSN: 0932-0067

DAY: 8

MONTH: 12

YEAR: 2007

The electromyographic activity of the external and internal urethral sphincters and urinary bladder on vaginal distension and its role in preventing vaginal soiling with urine during sexual intercourse. Information

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LANGUAGE: eng

NlmUniqueID: 8710213

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AFFILIATION: Department of Surgery and Experimental Research, Faculty of Medicine, Cairo University, Cairo, Egypt, shafik@ahmedshafik.com.

Country: Germany

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MEDLINETA: Arch Gynecol Obstet

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