Laparoscopy: the question of the proper gas.
D002245:Carbon Dioxide / Q000008:administration & dosage; D006801:Humans; D010535:Laparoscopy / Q000379:methods*; D009609:Nitrous Oxide / Q000008:administration & dosage; D010100:Oxygen / Q000008:administration & dosage
D002245:Carbon Dioxide; D009609:Nitrous Oxide; D010100:Oxygen