title: Complications of different ventilation strategies in endoscopic laryngeal surgery: a 10-year review.
abstract: BACKGROUND
  Spontaneous ventilation, mechanical controlled ventilation, apneic intermittent ventilation, and jet ventilation are commonly used during interventional suspension microlaryngoscopy. The aim of this study was to investigate specific complications of each technique, with special emphasis on transtracheal and transglottal jet ventilation.
  
  
  METHODS
  The authors performed a retrospective single-institution analysis of a case series of 1,093 microlaryngoscopies performed in 661 patients between January 1994 and January 2004. Data were collected from two separate prospective databases. Feasibility and complications encountered with each technique of ventilation were analyzed as main outcome measures.
  
  
  RESULTS
  During 1,093 suspension microlaryngoscopies, ventilation was supplied by mechanical controlled ventilation via small endotracheal tubes (n = 200), intermittent apneic ventilation (n = 159), transtracheal jet ventilation (n = 265), or transglottal jet ventilation (n = 469). Twenty-nine minor and 4 major complications occurred. Seventy-five percent of the patients with major events had an American Society of Anesthesiologists physical status classification of III. Five laryngospasms were observed with apneic intermittent ventilation. All other 24 complications (including 7 barotrauma) occurred during jet ventilation. Transtracheal jet ventilation was associated with a significantly higher complication rate than transglottal jet ventilation (P < 0.0001; odds ratio, 4.3 [95% confidence interval, 1.9-10.0]). All severe complications were related to barotraumas resulting from airway outflow obstruction during jet ventilation, most often laryngospasms.
  
  
  CONCLUSIONS
  The use of a transtracheal cannula was the major independent risk factor for complications during jet ventilation for interventional microlaryngoscopy. The anesthetist's vigilance in clinically detecting and preventing outflow airway obstruction remains the best prevention of barotrauma during subglottic jet ventilation.
authors.affiliation: Department of Otolaryngology, Head and Neck Surgery, University Hospital of Lausanne, Switzerland. yves.jaquet@hospvd.ch
authors.forename: Yves
authors.initials: Y
authors.lastname: Jaquet
authors.forename: Philippe
authors.initials: P
authors.lastname: Monnier
authors.forename: Guy
authors.initials: G
authors.lastname: Van Melle
authors.forename: Patrick
authors.initials: P
authors.lastname: Ravussin
authors.forename: Donat R
authors.initials: DR
authors.lastname: Spahn
authors.forename: Madeleine
authors.initials: M
authors.lastname: Chollet-Rivier
mesh_terms: D000293:Adolescent; D000328:Adult; D000769:Anesthesia, Inhalation; D002648:Child; D002675:Child, Preschool; D016208:Databases, Factual; D005260:Female; D006611:High-Frequency Jet Ventilation; D006801:Humans; D007223:Infant; D007385:Intermittent Positive-Pressure Ventilation; D007431:Intraoperative Complications / Q000453:epidemiology; D007818:Laryngeal Diseases / Q000601:surgery; D007828:Laryngoscopy / Q000379:methods*; D007830:Larynx / Q000601:surgery*; D008297:Male; D012121:Respiration, Artificial / Q000009:adverse effects / Q000379:methods*; D012189:Retrospective Studies; D012307:Risk Factors