title: Changes in cuff pressure and position of cylindrical-cuff and tapered-cuff tracheal tubes during laparoscopic abdominal surgery.
abstract: OBJECTIVE
  To evaluate changes in cuff pressure and position of tapered-cuff and cylindrical-cuff tracheal tubes (TTs) during laparoscopic cholecystectomy; to compare the frequency of endobronchial intubation and airway complaints with the two types of TT.
  
  
  METHODS
  Patients were randomly assigned to intubation with a TT with a cylindrical cuff (group C) or a tapered cuff (group T). Anaesthesia was maintained with sevoflurane, O(2) and N(2)O after intubation. TT cuffs were inflated to 20 cm H(2)O; changes in cuff pressure and volume were measured up to 30 min after the start of N(2)O use. Distance between the TT tip and the carina was measured before and after pneumoperitoneum and position change. Frequency of sore throat, dysphagia and hoarseness in the two groups was recorded.
  
  
  RESULTS
  Cuff volume and pressure were significantly lower in group T than in group C (n = 32 per group). Cuff pressure and volume significantly increased 30 min after start of N(2)O use in both groups. Distance from the TT tip to the carina decreased during surgery in both groups. There were no cases of endobronchial intubation, and there were no between-group differences in the frequency of airway complaints.
  
  
  CONCLUSIONS
  The tapered cuff was associated with a smaller change in cuff pressure during laparoscopic cholecystectomy than the cylindrical cuff, and therefore may be associated with increased preservation of tracheal mucosal perfusion.
authors.affiliation: Department of Anesthesiology and Pain Medicine, Korea University Anam Hospital, Seoul, Republic of Korea hwshin99@yahoo.com.
authors.forename: Hye Won
authors.initials: HW
authors.lastname: Shin
authors.affiliation: Department of Anesthesiology and Pain Medicine, Korea University Anam Hospital, Seoul, Republic of Korea.
authors.forename: Dong Hwan
authors.initials: DH
authors.lastname: Kim
authors.affiliation: Department of Anesthesiology and Pain Medicine, Korea University Anam Hospital, Seoul, Republic of Korea.
authors.forename: Hae Seun
authors.initials: HS
authors.lastname: Yoo
authors.affiliation: Department of Anesthesiology and Pain Medicine, Korea University Guro Hospital, Seoul, Republic of Korea.
authors.forename: Dong Kyu
authors.initials: DK
authors.lastname: Lee
authors.affiliation: Department of Surgery, Korea University Anam Hospital, Seoul, Republic of Korea.
authors.forename: Young Dong
authors.initials: YD
authors.lastname: Yoo
authors.affiliation: Department of Anesthesiology and Pain Medicine, Korea University Anam Hospital, Seoul, Republic of Korea.
authors.forename: Choon Hak
authors.initials: CH
authors.lastname: Lim
mesh_terms: D000005:Abdomen / Q000601:surgery*; D000328:Adult; D000758:Anesthesia; D002763:Cholecystectomy; D005260:Female; D006801:Humans; D007442:Intubation, Intratracheal / Q000295:instrumentation*; D010535:Laparoscopy; D008297:Male; D008875:Middle Aged; D011182:Postoperative Care; D011312:Pressure
keywords: Airway complications; laparoscopic surgery; tracheal cuff; tracheal tube