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Microsphere Intestinal Blood Flow Analysis During Pneumoperitoneum Using Carbon Dioxide and Helium

Overview
Journal Surg Endosc
Publisher Springer
Date 2005 Mar 3
PMID 15742125
Citations 4
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Abstract

Background: Pneumoperitoneum has been associated with a decreased flow in the superior mesenteric artery and portal venous system. Intestinal blood flow was studied during a 2-h pneumoperitoneum with carbon dioxide (CO2) or helium in a porcine model using colored microspheres.

Methods: For this study, 12 pigs were divided into two groups (6 CO2 and 6 helium). Different colored microspheres were injected directly into the left ventricle before, 40, 80, and 120 min after insufflation with either gas at a pressure of 15 mmHg. Microsphere concentration was measured in the mucosa and muscularis/serosa layers of the jejunum, cecum, and sigmoid colon to calculate blood flow.

Results: Intestinal perfusion initially increases with insufflation and returns to near baseline levels during pneumoperitoneum of 2 h. The effect of helium on tissue perfusion is similar to that of carbon dioxide.

Conclusions: Intestinal perfusion does not change significantly during prolonged pneumoperitoneum at a pressure of 15 mmHg with CO2 or helium.

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