Pathophysiological and clinical aspects of the CO2 pneumoperitoneum (CO2-PP) |
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Authors: | H Gebhardt A Bautz M Ross D Loose H Wulf H Schaube |
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Institution: | (1) Department of General and Thoracic Surgery, University of Kiel, Arnold-Heller-Str. 7, 24105 Kiel, Germany, DE;(2) Department of Anaesthesiology, University of Kiel, Arnold-Heller-Str. 7, 24105 Kiel, Germany, DE |
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Abstract: | Experimental studies demonstrated a severe cardiac load of the CO2 pneumoperitoneum caused by an accelerated after- and a decreased preload. Patients displaying cardiovascular risks are therefore
often rejected from laparoscopic surgery. Hence, the pathophysiological changes and the intraoperative risk of the CO2 pneumoperitoneum in high-risk cardiopulmonary patients (NYHA II–III, n= 15) undergoing laparoscopic cholecystectomy are described. The changes in cardiac after- and preload seem to be due to the
elevated intraabdominal pressure rather than transperitoneally resorbed CO2 and are reversible by desufflation. In one patient conversion to open operation had to be performed because of a severe drop
in cardiac output and right ventricle ejection fraction. Mixed oxygen saturation was predicting intraoperative worsening in
this case. The described pathophysiological changes may seem to be well tolerated even in high-risk cardiac patients. Monitoring
of hemodynamics should include an arterial catheter line and blood gas analyses. Pharmacologic interventions or pressureless
laparoscopic procedures might not be necessary as long as laparoscopic cholecystectomy is performed.
Received: 13 December 1996/Accepted: 8 January 1997 |
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Keywords: | : Laparoscopic surgery — CO2 pneumoperitoneum — Pathophysiology — Intraoperative risk — Monitoring |
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