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S
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Influence of Body Position on
Defecation in Humans
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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,
Clinical Physiology Unit, Sakura Medical Center, Toho University, Sakura, Japan,
Department of Radiology, Sakura Medical Center, Toho University, Sakura, Japan,
Department of Neurology, Chiba University, Chiba, Japan, and
Department of Urology, Dokkyo Medical College, Tochigi, Japan
Chairman:Dr.Hung-Chi Yang
Presenter:Bee-Yen Lim
Adviser:Dr. Yi-Chun Du
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Outline
٥ Introduction
٥ Purposes
٥ Material and Methods
٥ Results
٥ Discussion and Conclusions
٥ References
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Introduction
٥ 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)
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Purposes
٥ To compare three positions for defecation
by measuring abdominal pressure and the
anorectal angle simultaneously.
٥ To compare the straining forces applied
when sitting or squatting during defecation.
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Material and Methods
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Six healthy volunteers(one male, five females)
Age range:36–44 years(mean age:41 years old)
Apparently normal bowel function
A triple-lumen 9F catheter was inserted into
the anus
٥ An 8F catheter (used to measure abdominal
[bladder] pressure) was inserted into the
bladder
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Results
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Conclusions
٥ 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.
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References
٥ Ryuji Sakakibara,Kuniko Tsunoyama, Hiroyasu Hosoi, Osamu Takahashi,Megumi
Sugiyama,Masahiko Kishi, Emina Ogawa, Hitoshi Terada,Tomoyuki Uchiyama,
Tomonori Yamanishi,“Influence of Body Position on Defecation in Humans,”
LUTS, 2, 16–21, 2010
٥ Dov Sikirov, “Comparison of Straining During Defecation in Three Positions,”
Digestive Diseases and Sciences, 48(7),1201-1205, 2003
٥ http://www.youtube.com/watch?v=cdijh32NiLs
٥ http://cht.a-hospital.com/
٥ http://ibs.about.com/od/ibsglossaryae/g/Anorectal-Manometry.htm
٥ http://www.colonicvitalityuk.com/news.asp?id=25
٥ http://cosmicamericanblog.blogspot.tw/2010_08_01_archive.html
٥ http://lady.people.com.cn/BIG5/n/2012/0822/c1014-18799941.html
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