title: Effect of heating and humidifying gas on patients undergoing awake laparoscopy.
abstract: OBJECTIVE
  To determine the effect of heating and humidifying CO2 on the tolerance of awake laparoscopy and frequency of shoulder pain and patient recovery.
  
  
  METHODS
  Randomized, controlled study (Canadian Task Force classification I).
  
  
  METHODS
  University-affiliated hospital.
  
  
  METHODS
  Forty consecutive women.
  
  
  METHODS
  Awake laparoscopy with and without heating and humidifying CO2.
  
  
  RESULTS
  Heating and humidifying CO2 decreased the frequency of shoulder pain and increased tolerance of the procedure. Thirty percent of patients required no intravenous sedation and did not experience shoulder pain when 3 L of gas or 15 mm Hg pressure was achieved. When shoulder pain did occur with heated and humidified gas, it was brief.
  
  
  CONCLUSIONS
  Heating and humidifying CO2 increases tolerance of awake laparoscopy and decreases the frequency and duration of shoulder pain.
authors.affiliation: Department of Obstetrics and Gynecology, University of Calgary, Alberta, Canada.
authors.forename: L
authors.initials: L
authors.lastname: Demco
mesh_terms: D002245:Carbon Dioxide; D004311:Double-Blind Method; D005260:Female; D006358:Hot Temperature; D006801:Humans; D006813:Humidity; D010535:Laparoscopy / Q000009:adverse effects / Q000379:methods*; D011028:Pneumoperitoneum, Artificial / Q000009:adverse effects / Q000379:methods*; D020069:Shoulder Pain / Q000209:etiology / Q000517:prevention & control*
chemical_list: D002245:Carbon Dioxide