Collateral Circulation in the Sigmoid Colon
1955; American Medical Association; Volume: 71; Issue: 4 Linguagem: Inglês
10.1001/archsurg.1955.01270160057007
ISSN1538-3644
Autores Tópico(s)Anesthesia and Pain Management
ResumoThe blood supply to the sigmoid colon and upper rectum is traditionally related to a "critical point" beyond which ligation will cause necrosis. Most surgeons doubt this theory, but experimental proof is lacking. The arteries to the sigmoid colon and rectum have been reinvestigated with special reference to this question in fresh human autopsy material. HISTORICAL REVIEW Sudeck, 1 in 1907, established a "critical point" in the superior hemorrhoidal artery after observing gangrene of the upper rectum in two patients whose superior hemorrhoidal arteries had been ligated just distal to the last sigmoid branch of the inferior mesenteric artery during perineal resection of the rectum. He later found by injection experiments that the vessels of the rectum became filled with injecting material from the inferior mesenteric artery only by traversing a marginal artery above the origin of the last sigmoid branch. If the ligature was placed below the origin of
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