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Robin Locke, MD; Carl J. Hauser, MD; William C. Shoemaker, MD

Arch Surg. 1984;119(11):1252-1256.

Abstract
• Tissue depends on perfusion, but tissue oxygenation measurements have been impractical. To develop a method for the clinical evaluation of bowel viability, we studied Po₂ on the bowel surface (Pso₂). The Pso₂ was assessed on the stomach and intestine of 11 dogs. Normal small-bowel Pso₂ was 44±11 mm Hg (mean ± SD). When bowel vasculature was interrupted Pso₂ rapidly decreased. Reductions in Pso₂ were related to the degree of ischemia produced. Anastomoses were performed on partially devascularized bowel to determine anastomotic viability at various levels of Pso₂. The Pso₂. measured just prior to anastomosis predicted viability of the anastomoses at 48 hours. Anastomoses below 30% of predevascularization Pso₂ necrosed. Between 30% and 50%, one third of anastomoses leaked. At Pso₂ values above 50% of initial normal value all anastomoses healed. Surface oximetry allows accurate intraoperative assessment of bowel perfusion.

(Arch Surg 1984;119:1252-1256)

Author Affiliations
From the Department of Surgery, Los Angeles County Harbor—UCLA Medical Center.

Footnotes
Accepted for publication July 31, 1984.

Read before the Annual Meeting of the Southern California Chapter of the American College of Surgeons, Santa Barbara, Calif, Jan 27, 1984.

Reprint requests to Department of Surgery, Box 15, Harbor—UCLA Medical Center, 1000 W Carson St, Torrance, CA 90509 (Dr Hauser).

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