title: Impact of body mass index (BMI) on ventilation during low-frequency jet ventilation.
abstract: OBJECTIVE
  Percutaneous trans-tracheal jet ventilation (PTJV) is an alternative ventilatory approach in airway surgery. We evaluated the effects of body mass index (BMI) on ventilation during low-frequency jet ventilation.
  
  
  METHODS
  Forty-two patients undergoing micro-laryngeal surgery under total anesthesia were studied. Low-frequency jet ventilation was applied through an injector inserted into the trachea via cricothyroid membrane; ventilation was assessed during the operation by arterial blood gas sampling.
  
  
  RESULTS
  The age range of the patients was 43.54 +/- 12.04 years, weight was 69.97 +/- 11.66 kg, and BMI 24.80 +/- 2.78 (mean +/- SD). There was a strong correlation (P < 0.05) and a good correspondence between the BMI and mean PaCO(2), and arterial pH.
  
  
  CONCLUSIONS
  This method was effective in maintaining gas exchange in the presence of micro-laryngeal surgery for low-BMI patients. It provided a nice visible surgical field, avoiding the use of combustible material inside the larynx or trachea.
authors.affiliation: Baqiyatallah Medical Science University, Tehran, Iran.
authors.forename: Hassan Lal Dolat
authors.initials: HL
authors.lastname: Abad
authors.forename: Mohammad
authors.initials: M
authors.lastname: Ajalloueyan
authors.forename: Ali Reza
authors.initials: AR
authors.lastname: Jalali
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000768:Anesthesia, General; D015992:Body Mass Index; D001835:Body Weight / Q000502:physiology; D002245:Carbon Dioxide / Q000097:blood; D003413:Cricoid Cartilage; D005260:Female; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007267:Injections / Q000295:instrumentation; D007830:Larynx / Q000601:surgery; D008297:Male; D008866:Microsurgery / Q000379:methods; D008875:Middle Aged; D009765:Obesity / Q000503:physiopathology; D010100:Oxygen / Q000097:blood; D012121:Respiration, Artificial / Q000295:instrumentation / Q000379:methods*; D013957:Thyroid Cartilage; D013997:Time Factors; D014132:Trachea
chemical_list: D002245:Carbon Dioxide; D010100:Oxygen