Heating and humidifying of carbon dioxide during pneumoperitoneum is not indicated

Abstract

The intraabdominal environment in terms of temperature and humidity was similar in all the groups. There was no significant difference in the intraoperative body temperatures or the postoperative variable measured. No histologic changes were identified. Heating or humidifying of CO2 is not justified for patients undergoing laparoscopic bariatric surgery.

A randomized controlled study evaluating the effects of the temperature of insufflated CO2 on core body temperature and blood gases (an experimental study)

“…[28], Davis at al. [29], and Nguyen at al. [30] all determined no significant drop in CBT with the use of standard CO 2 .…”

Abdominal Effects Of Laparoscopic Surgery

“…[25] The passage of CO2 through the insufflator and tubing apparatus raises this temperature to approximately room temperature (19°C-21°C) at the point of delivery to the peritoneal cavity with a relative humidity approaching 0% at the point of entry into the peritoneal cavity. [34][35][36] However, this still is significantly lower than the normal intraperitoneal or core temperature. Large volumes of gas may be required for a single patient (up to 500 litres), owing to the imperfect seal of the laparoscopic ports and peritoneal CO2 absorption.…”

Anesthesia in Bariatric Surgery

“…Forced-air heating blankets are always applied, and warmed intravenous and irrigating fl uid are occasionally needed. Attempts to minimize heat loss using heated and humidifi ed gas for the pneumo-peritoneum have not been successful [ 10 ].…”