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Splanchnic microcirculatory changes during CO2 laparoscopy
M K Schilling1, C Redaelli, L Krähenbühl
1Department of Visceral and Transplantation Surgery, University of Bern, Inselspital Bern, Switzerland.
Journal of the American College of Surgeons
|April 1, 1997
Summary
Elevating intra-abdominal pressure above 10 mm Hg during laparoscopic surgery significantly reduces blood flow to abdominal organs. To prevent splanchnic microcirculatory disturbances, maintain lower pressures during CO2 pneumoperitoneum.
Area of Science:
- Gastroenterology
- Surgical Innovation
- Microcirculation Research
Background:
- High-pressure CO2 pneumoperitoneum in experimental models reduces mesenteric blood flow and gastric perfusion.
- Microcirculatory changes in abdominal organs under clinical low-pressure CO2 pneumoperitoneum are not well understood.
Purpose of the Study:
- To investigate the impact of varying intra-abdominal pressures during clinical CO2 pneumoperitoneum on splanchnic microcirculation.
- To determine optimal pressure settings for laparoscopic procedures to maintain organ perfusion.
Main Methods:
- 18 patients undergoing laparoscopy for cholecystolithiasis, acute cholecystitis, or appendicitis were studied.
- Laser Doppler flowmetry measured blood flow in the stomach, duodenum, jejunum, colon, liver, and peritoneum.
- Measurements were taken at intra-abdominal pressures of 0, 10, and 15 mm Hg.
Main Results:
- Increasing intra-abdominal pressure from 10 to 15 mm Hg significantly reduced blood flow in the stomach (40-54%), jejunum (32%), colon (44%), liver (39%), and parietal peritoneum (60%).
- Duodenal blood flow decreased by 11% at the higher pressure.
- Splanchnic blood flow showed a significant inverse correlation with operative time (r = 0.88, p < 0.0001).
Conclusions:
- Laparoscopic procedures utilizing CO2 pneumoperitoneum should be conducted at or below 10 mm Hg.
- Maintaining lower intra-abdominal pressures is crucial to prevent detrimental splanchnic microcirculatory disturbances.
- Findings support optimizing pressure settings to safeguard organ perfusion during minimally invasive surgery.