Disorders Of Colonic And Anorectal Function Notes
This is a sample of our (approximately) 3 page long Disorders Of Colonic And Anorectal Function notes, which we sell as part of the Gastrointestinal (GI) System Notes collection, a 1st (70-80%) package written at Bristol University in 2012 that contains (approximately) 57 pages of notes across 19 different documents.
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Disorders Of Colonic And Anorectal Function Revision
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Lecture 20 Disorder of colonic and anorectal function
Colonic function o Absorbs water- 1L into caecum- 100ml in stool o Storage o Mass peristalsis o Nutritional role Anorectal function and anatomy o Rectal reservoir o Internal anal sphincter/External anal sphincter o Puborectalis o Pudendal nerve Constipation o General
Range of BM 3/day- 1/3 days
Variable- history important
Straining Passage of hard stool o Signs
Examination may be unhelpful
General signs- Myxoedema
Loaded colon on abdo palpation
PR presence of large amount of stool o Investigation
Rules out organic disease (e.g. obstruction); metabolic disorders
Proctography o Slow transit constipation
May be associated with visceral myopathy/neuropathy
If visceral myopathy=small bowel transit problems Evacuatory disorders o Epi
Parous (given birth) middle aged
Young nulliparous o Types
• Prolonged straining at stool
• Spending hours on toilet
Normal/slow transit constipation
Pelvic floor dysfunction
Paradoxical pelvic floor contraction
• Normal response to decrease activity in EAS and puborectalis
• Anismus- increased recruitment of striated muscle in pelvic floor
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