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Influence of Body Position on Defecation in Humans

Influence of Body Position on Defecation in Humans. Department of Internal Medicine, Division of Neurology, Sakura Medical Center, Toho University, Sakura, Japan, Department of Urology, Tokyo Women’s Medical University, Tokyo, Japan, Aishin Seiki Inc., Tokyo, Japan,

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Influence of Body Position on Defecation in Humans

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  1. Influence of Body Position on Defecation in Humans Department of Internal Medicine, Division of Neurology, Sakura Medical Center, Toho University, Sakura, Japan, Department of Urology, Tokyo Women’s Medical University, Tokyo, Japan, AishinSeiki Inc., Tokyo, Japan, ClinicalPhysiology Unit, Sakura Medical Center, Toho University, Sakura, Japan, Department of Radiology, Sakura MedicalCenter, Toho University, Sakura, Japan, Department of Neurology, Chiba University, Chiba, Japan, and Department ofUrology, Dokkyo Medical College, Tochigi, Japan Chairman:Dr.Hung-Chi Yang Presenter:Bee-Yen Lim Adviser:Dr. Yi-Chun Du

  2. Outline Introduction Purposes Material and Methods Results Discussionand Conclusions References

  3. Introduction • Normal defecation is thought to necessitate three components: • spontaneous phasic rectal contraction that starts during storage(autonomic component) • relaxation of the anal canal with an enlarged anorectal angle • straining(somatic component)

  4. Purposes • To compare the straining forces applied when sitting or squatting during defecation. To compare three positions for defecation by measuring abdominal pressure and the anorectal angle simultaneously.

  5. Material and Methods Six healthy volunteers(one male, five females) Agerange:36–44 years(mean age:41 years old) Apparently normal bowel function A triple-lumen 9F catheter was inserted into the anus An 8F catheter (used to measure abdominal [bladder] pressure) was inserted into the bladder

  6. Results

  7. Conclusions The results of the present study, taken together with earlier findings, suggest that the greater the hip flexion achieved by squatting the straighter the rectoanal canal will be, and accordingly, less strain will be required for defecation.

  8. References Ryuji Sakakibara,KunikoTsunoyama, Hiroyasu Hosoi, Osamu Takahashi,MegumiSugiyama,MasahikoKishi, Emina Ogawa, Hitoshi Terada,Tomoyuki Uchiyama, Tomonori Yamanishi,“Influence of Body Position on Defecation in Humans,”LUTS, 2, 16–21, 2010 DovSikirov, “Comparison of Straining During Defecation in Three Positions,” Digestive Diseases and Sciences, 48(7),1201-1205, 2003 http://www.youtube.com/watch?v=cdijh32NiLs http://cht.a-hospital.com/ http://ibs.about.com/od/ibsglossaryae/g/Anorectal-Manometry.htm http://www.colonicvitalityuk.com/news.asp?id=25 http://cosmicamericanblog.blogspot.tw/2010_08_01_archive.html http://lady.people.com.cn/BIG5/n/2012/0822/c1014-18799941.html

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