title: Oxygen enrichment during emergence with the laryngeal mask--the 'T-bag' versus the T-piece.
abstract: We have compared the performance of a new oxygen enrichment device, the 'T-bag', with a T-piece during emergence from spontaneous breathing anaesthesia with the laryngeal mask airway. Thirty patients were randomly allocated to each group. Inspired and end-tidal gases were sampled from the proximal end of the laryngeal mask airway. Cardiorespiratory variables were recorded immediately prior to discontinuation of anaesthesia, 2 min later and then at 5-min intervals until removal of the laryngeal mask airway. The mean inspired oxygen concentration was greater than 70% and the inspired carbon dioxide was less than 2 mmHg in both groups throughout emergence. There were no episodes of hypoxia (oxygen saturation < 92%). Both devices performed well, but the 'T-bag' offered advantages in terms of respiratory monitoring and ventilatory capability.
authors.affiliation: Department of Anaesthesia and Intensive Care, Cairns Base Hospital, Australia.
authors.forename: J
authors.initials: J
authors.lastname: Martin
authors.forename: J R
authors.initials: JR
authors.lastname: Brimacombe
mesh_terms: D000328:Adult; D000762:Anesthesia Recovery Period; D000768:Anesthesia, General; D016503:Drug Delivery Systems / Q000295:instrumentation*; D005260:Female; D006439:Hemodynamics; D006801:Humans; D017214:Laryngeal Masks; D008297:Male; D008875:Middle Aged; D010100:Oxygen / Q000097:blood; D010102:Oxygen Inhalation Therapy / Q000295:instrumentation*; D011182:Postoperative Care / Q000295:instrumentation*; D012119:Respiration
chemical_list: D010100:Oxygen