Believe
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A 70-year-old man has severe atherosclerotic disease of the abdominal aorta that obstructs the ostia of the superior and inferior mesenteric arteries. He has intermittent episodes of abdominal pain and bloody diarrhea. Which of the following regions of the bowel is likely to be most severely affected?
A) Ascending colon
B) Descending colon
C) Hepatic flexure
D) Splenic flexure
E) Transverse colon
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| cyra
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D
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| cyra
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The splenic flexure is the watershed zone between the superior mesenteric and the inferior mesenteric arteries....which renders this area susceptible to infarction.
The other watershed zone i know of is the distal colon where the watershed area is between the IMA and the hypogastric arteries.
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| GMOB
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cyra, well done!!! I like your explanations a lot!
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| mjl1717
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Yes, the explanations is where its at!
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| prader-willi
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ya the splenic flexure is watershed zone...so answer is d
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| Believe
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Vascular disease of the bowel Despite its abundant vascular supply, the bowel often suffers damage from lack of blood. Remember that the watershed zones of the large intestine are at the splenic flexure and at the rectosigmoid junction.
Edited by Believe on 12/05/05 - 09:41 PM
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| Doc2378
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Wow!!!...cool graphics!!!
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| sturge_weber
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yep splenic flexure
great explanation
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| Cedrick
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even better
D
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| fastness
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From where did he get those cool graphs.
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| waqastariq
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I dun need to say anythin...everybody has alrady explained in such agreat detail 
I can add that usually the guys with this ischemic colitis are above age of 60
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