Hemodynamic changes during gaseous and gasless laparoscopic cholecystectomy

Purpose. The main disadvantage of gaseous laparoscopic surgery is the need for CO2, insufflation and the elevation of intra-abdominal pressure. Gasless laparoscopic surgery is an alternative to gaseous laparoscopic surgery, which avoids the hazardous effects of pneumoperitoneum. This study was conducted to investigate the hemodynamic effects of pneumoperitoneum and to compare gasless and gaseous laparoscopic cholecystectomy on a hemodynamic basis. Methods. The gasless laparoscopic procedure uses an electromechanical retractor system to lift the abdominal wall. We performed 20 gaseous and 11 gasless laparoscopic cholecystectomies in a collective total of 31 patients with symptomatic gallostones. The mean arterial pressure, cart rate, end diastolic index, systemic vascular resistance index, cardiac index (CI), ejection fraction (EF), and stroke index (SI) values were monitored noninvasively by thoracic electrical bioimpedance. Results. In the gaseous group, statistically significant changes were detected in CI, EF, and SI values after insufflation as compared to the values before pneumoperitoneum. In the gasless group, only minimal changes were detected in the SI values, which were not significant. Conclusion. Gasless laparoscopy has little effect on the hemodynamic parameters of patients and provides an alternative to the gaseous technique in selected cases.