"effectiveness of abdominal wall elevator in reducing intra-abdominal pressure and co2 volume during laparoscopic cholecystectomy"

since co2 pneumoperitoneum is the dominant method of laparoscopic exposure due to facility and good view, its physiologic effects are most relevant to the surgeons. co2 pneumoperitoneum may affects hemodynamics by increased intra-abdominal pressure (iap) and the physiologic effects of absorbed co2. the adverse effects of both mechanisms relate directly to the duration of the pneumoperitoneum and the elevation of iap. gasless laparoscopy involves obtaining exposure for laparoscopy by placing an internal retracting device through a small incision and lifting the anterior abdominal wall. we designed and made a mechanical wall elevator and used it in 24 patients, compared with a control group (52 cases) using a conventional laparoscopic cholecystectomy. a prospective trial was undertaken in sina hospital, tehran university of medical sciences from 1998 to 2000. the patients were assigned randomly to two groups. there was a significant decrease in iap and co2 consumption in the group using mechanical wall elevator as compared to conventional laparoscopic cholecystectomy, (mean iap of 3.5 mmhg compared to 11.4 mmhg in the control group, mean co2 volume 17 liters compared to 73 liters in the control group). we recommend this semigasless method in laparoscopy due to safety in performance and significant reduction in iap through the surgery. this method provides a satisfactory view and easy performance without any increase in time or complications. the hospital stay and costs did not increase.