Preliminary study on the application of an umbrella-like abdominal wall-lifting device in gasless laparoscopic surgery.

Unlabelled: Abstract Background: In laparoscopic surgery with CO2 pneumoperitoneum, serious complications often occur for elderly patients and those who undergo long operations. These complications mainly include respiratory and circulatory system changes. In patients with tumors, release of free tumor cells into the abdominal cavity is believed to be possible.