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Surgical Endoscopy
Published in: Surgical Endoscopy 1/2006

01-01-2006

Heating and humidifying of carbon dioxide during pneumoperitoneum is not indicated

A prospective randomized trial

Authors: S. S. Davis, D. J. Mikami, M. Newlin, B. J. Needleman, M. S. Barrett, R. Fries, T. Larson, J. Dundon, M. I. Goldblatt, W. S. Melvin

Published in: Surgical Endoscopy | Issue 1/2006

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Abstract

Background

Carbon dioxide (CO2) pneumoperitoneum usually is created by a compressed gas source. This exposes the patient to cool dry gas delivered at room temperature (21°C) with 0% relative humidity. Various delivery methods are available for humidifying and heating CO2 gas. This study was designed to determine the effects of heating and humidifying gas for the intraabdominal environment.

Methods

For this study, 44 patients undergoing laparoscopic Roux-en-Y gastric bypass were randomly assigned to one of four arms in a prospective, randomized, single-blinded fashion: raw CO2 (group 1), heated CO2 (group 2), humidified CO2 (group 3), and heated and humidified CO2 (group 4). A commercially available CO2 heater–humidifier was used. Core temperatures, intraabdominal humidity, perioperative data, and postoperative outcomes were monitored. Peritoneal biopsies were taken in each group at the beginning and end of the case. Biopsies were subjected staining protocols designed to identify structural damage and macrophage activity. Postoperative narcotic use, pain scale scores, recovery room time, and length of hospital stay were recorded. One-way analysis of variance (ANOVA) and the nonparametric Kruskal–Wallis test were used to compare the groups.

Results

Demographics, volume of CO2 used, intraabdominal humidity, bladder temperatures, lens fogging, and operative times were not significantly different between the groups. Core temperatures were stable, and intraabdominal humidity measurements approached 100% for all the patients over the entire procedure. Total narcotic dosage and pain scale scores were not statistically different. Recovery room times and length of hospital stay were similar in all the groups. Only one biopsy in the heated–humidified group showed an increase in macrophage activity.

Conclusions

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.
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Metadata
Title
Heating and humidifying of carbon dioxide during pneumoperitoneum is not indicated
A prospective randomized trial
Authors
S. S. Davis
D. J. Mikami
M. Newlin
B. J. Needleman
M. S. Barrett
R. Fries
T. Larson
J. Dundon
M. I. Goldblatt
W. S. Melvin
Publication date
01-01-2006
Publisher
Springer-Verlag
Published in
Surgical Endoscopy / Issue 1/2006
Print ISSN: 0930-2794
Electronic ISSN: 1432-2218
DOI
https://doi.org/10.1007/s00464-005-0271-x

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