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- W2020473648 abstract "No AccessJournal of UrologyInvestigative urology1 Dec 2006Functional Analysis of Active Urethral Closure Mechanisms Under Sneeze Induced Stress Condition in a Rat Model of Birth Trauma Izumi Kamo, Yasuhiro Kaiho, Tracy W. Canon, Michael B. Chancellor, William C. de Groat, Rachelle L. Prantil, David A. Vorp, and Naoki Yoshimura Izumi KamoIzumi Kamo Department of Urology, University of Pittsburgh, Pittsburgh, Pennsylvania Pharmaceutical Research Division, Takeda Pharmaceutical Company Ltd., Osaka, Japan More articles by this author , Yasuhiro KaihoYasuhiro Kaiho Department of Urology, University of Pittsburgh, Pittsburgh, Pennsylvania More articles by this author , Tracy W. CanonTracy W. Canon Department of Urology, University of Pittsburgh, Pittsburgh, Pennsylvania More articles by this author , Michael B. ChancellorMichael B. Chancellor Department of Urology, University of Pittsburgh, Pittsburgh, Pennsylvania More articles by this author , William C. de GroatWilliam C. de Groat Department of Pharmacology, Surgery and Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania More articles by this author , Rachelle L. PrantilRachelle L. Prantil McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania More articles by this author , David A. VorpDavid A. Vorp McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania More articles by this author , and Naoki YoshimuraNaoki Yoshimura Department of Urology, University of Pittsburgh, Pittsburgh, Pennsylvania Department of Pharmacology, Surgery and Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania More articles by this author View All Author Informationhttps://doi.org/10.1016/j.juro.2006.07.139AboutFull TextPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail Abstract Purpose: We evaluated changes in the urethral closure mechanism under a sneeze induced stress condition in a rat model of birth trauma. Materials and Methods: Four days after vaginal distention induced by balloon catheter inflation in the vagina sneezing was induced while recording intravesical pressure with the rat under urethane anesthesia to evaluate sneeze induced leak point pressure, defined as the lowest pressure inducing fluid leakage from the urethral meatus during sneezing. Sneeze induced responses in the bladder and proximal or mid urethra were also measured using microtip transducer catheters. Results: In 5 sham operated rats no leakage was observed from the urethral meatus during sneezing, which produced an increase in intravesical pressure of up to 34 cm H2O. However, in 5 of 6 rats with vaginal distention leakage during sneezing was observed with a sneeze leak point pressure of 26.2 cm H2O. In the mid urethra microtip transducer catheters revealed that pressure increases during sneezing were greater than those in the bladder but they were significantly decreased in the 5 incontinent vaginal distention rats. However, sneeze induced responses at the proximal urethra, which were similar to those in the bladder, were not different in sham operated and incontinent vaginal distention rats. Conclusions: Sneeze induced stress urinary incontinence in a rat model of birth trauma was caused by decreased active closure mechanisms at the mid urethra without affecting the passive transmission of abdominal pressure in the proximal urethra. References 1 : Recent advances in the neurophysiology of stress urinary incontinence. Scand J Urol Nephrol2005; 39: 21. Google Scholar 2 : Effect of simulated birth trauma on the urinary continence mechanism in the rat. Urology1998; 52: 143. 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Google Scholar © 2006 by American Urological AssociationFiguresReferencesRelatedDetailsCited bySumino Y, Yoshikawa S, Mimata H and Yoshimura N (2013) Therapeutic Effects of IGF-1 on Stress Urinary Incontinence in Rats with Simulated Childbirth TraumaJournal of Urology, VOL. 191, NO. 2, (529-538), Online publication date: 1-Feb-2014.Kitta T, Haworth-Ward D, Miyazato M, Honda M, de Groat W, Nonomura K, Vorp D and Yoshimura N (2011) Effects of Ovariectomy and Estrogen Replacement on the Urethral Continence Reflex During Sneezing in RatsJournal of Urology, VOL. 186, NO. 4, (1517-1523), Online publication date: 1-Oct-2011.Kitta T, Miyazato M, Chancellor M, de Groat W, Nonomura K and Yoshimura N (2010) α2-Adrenoceptor Blockade Potentiates the Effect of Duloxetine on Sneeze Induced Urethral Continence Reflex in RatsJournal of Urology, VOL. 184, NO. 2, (762-768), Online publication date: 1-Aug-2010.Furuta A, Asano K, Egawa S, de Groat W, Chancellor M and Yoshimura N (2009) Role of α2-Adrenoceptors and Glutamate Mechanisms in the External Urethral Sphincter Continence Reflex in RatsJournal of Urology, VOL. 181, NO. 3, (1467-1473), Online publication date: 1-Mar-2009.Hijaz A, Daneshgari F, Sievert K and Damaser M (2008) Animal Models of Female Stress Urinary IncontinenceJournal of Urology, VOL. 179, NO. 6, (2103-2110), Online publication date: 1-Jun-2008. Volume 176Issue 6December 2006Page: 2711-2715 Advertisement Copyright & Permissions© 2006 by American Urological AssociationKeywordsurethraurinary incontinenceratsbladderparturitionstressSprague-DawleyMetricsAuthor Information Izumi Kamo Department of Urology, University of Pittsburgh, Pittsburgh, Pennsylvania Pharmaceutical Research Division, Takeda Pharmaceutical Company Ltd., Osaka, Japan More articles by this author Yasuhiro Kaiho Department of Urology, University of Pittsburgh, Pittsburgh, Pennsylvania More articles by this author Tracy W. Canon Department of Urology, University of Pittsburgh, Pittsburgh, Pennsylvania More articles by this author Michael B. Chancellor Department of Urology, University of Pittsburgh, Pittsburgh, Pennsylvania More articles by this author William C. de Groat Department of Pharmacology, Surgery and Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania More articles by this author Rachelle L. Prantil McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania More articles by this author David A. Vorp McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania More articles by this author Naoki Yoshimura Department of Urology, University of Pittsburgh, Pittsburgh, Pennsylvania Department of Pharmacology, Surgery and Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania More articles by this author Expand All Advertisement PDF downloadLoading ..." @default.
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