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Heat and Moisture Exchanger and Low-flow Gas

This study has been completed.
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior.
Information provided by:
UPECLIN HC FM Botucatu Unesp Identifier:
First received: October 16, 2009
Last updated: NA
Last verified: October 2009
History: No changes posted
The aim of the present study was to measure the inspired gas temperature and humidity of the anesthetic circuit in the Dräger Primus machine and esophageal temperature with or without and heat and moisture exchanger (HME) and low-flow gas during anesthesia in patients submitted to gynecological surgeries.

Gynecological Surgery
General Anesthesia

Study Type: Observational
Study Design: Observational Model: Case Control
Time Perspective: Prospective
Official Title: The Effects of a Heat and Moisture Exchanger on Temperature and Humidity in Low -Flow Anesthesia Workstation

Resource links provided by NLM:

Further study details as provided by UPECLIN HC FM Botucatu Unesp:

Enrollment: 30
Study Start Date: January 2007
Study Completion Date: September 2009
Primary Completion Date: June 2008 (Final data collection date for primary outcome measure)
Heat moisture exchanger (HME)
This group was submitted to general anesthesia with low flow gas and heat moisture exchanger
Low flow gas (LFG)
This group was submitted to general anesthesia with only low flow gas
Humidity of the respiration

Heat and moisture group:

The first group (G1)will be submitted to low flow gas anesthesia and heat and moisture exchanger (HME)

Control group:

The second group(G2)Will be submitted to low flow gas anesthesia



Ages Eligible for Study:   18 Years to 69 Years   (Adult, Senior)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   No
Sampling Method:   Probability Sample
Study Population
Thirty adult patients scheduled to gynecologic surgeries were randomly assigned in two groups to received fresh gas flow of 1 l.min-1 with or without in circle anesthesia system. Relative humidity, absolute humidity, temperature of gases and esophageal temperature were measured at 15 min (T0)after respiratory circuit installation and then every 30 min up to 120 min afterwards.

Inclusion Criteria:

  • Women
  • 18 to 69 years old
  • Gynecological

Exclusion Criteria:

  • Obesity
  • Fever
  • Endocrine disease
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Please refer to this study by its identifier: NCT00997295

College of Medicine of Botucatu
Botucatu, São Paulo, Brazil, 18618000
Sponsors and Collaborators
UPECLIN HC FM Botucatu Unesp
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior.
Principal Investigator: Jair Castro Jr, MD Botucatu Medical Faculty
  More Information

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Clinical Research Ethic Committee of Botucatu Medical School, Botucatu Medical School, UNESP Identifier: NCT00997295     History of Changes
Other Study ID Numbers: upeclin/HC/FMB-Unesp-29
Study First Received: October 16, 2009
Last Updated: October 16, 2009

Keywords provided by UPECLIN HC FM Botucatu Unesp:
low flow gas
Heat and moisture exchanger
Core temperature
Women processed this record on May 25, 2017