Cohn et al1 concluded that ongoing diverticular bleeding after 4-unit blood transfusion requires subtotal colectomy without localization by angiography. Their conclusion was based on record review, including 4 successful subtotal colectomies, and on review of the literature. By the same devices, we reached the same conclusion in 1972.2
McGuire, Jr HH. Preoperative Angiography for Gastrointestinal Bleeding. Arch Surg. 1998;133(7):781. doi:
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