title: The comparison of insertion depth for orotracheal intubation between standard polyvinyl chloride tracheal tubes and straight reinforced tracheal tubes.
abstract: OBJECTIVE
  To investigate whether these properties of reinforced tubes cause difference in insertion depth compared to standard polyvinyl chloride tracheal tubes.
  
  
  METHODS
  A randomized controlled trial.
  
  
  METHODS
  Operation room.
  
  
  METHODS
  Standard polyvinyl chloride tracheal tubes, reinforced tubes.
  
  
  METHODS
  Seventy-six adult patients undergoing surgery under general anesthesia were randomly allocated with standard tube (n=38) or reinforced tube (n=38) intubation. The endotracheal tube was fixed at the right canine with a predetermined insertion depth using the formula: endotracheal tube insertion length (cm)=0.1977 × [body height (cm)] - 12.7423.
  
  
  METHODS
  The distances between the tracheal tube tip and the carina using fiberoptic bronchoscope.
  
  
  RESULTS
  The mean tip-to-carina distance of reinforced tube was about 1.2cm longer than that of standard tube (P<.001).
  
  
  CONCLUSIONS
  The insertion depth of straight reinforced tracheal tubes can be shorter than that of standard polyvinyl chloride tracheal tubes due to different tube pathways in the upper airway.
authors.affiliation: Department of Anesthesia and Pain Medicine, Kyung Hee University Hospital, College of Medicine, Kyung Hee University, Seoul, Korea.
authors.forename: Jung-Eun
authors.initials: JE
authors.lastname: Kim
authors.affiliation: Department of Anesthesia and Pain Medicine, Kyung Hee University Hospital, College of Medicine, Kyung Hee University, Seoul, Korea.
authors.forename: Sung-Wook
authors.initials: SW
authors.lastname: Park
authors.affiliation: Department of Anesthesiology and Pain Medicine, Kyung Hee University Hospital at Gangdong, College of Medicine, Kyung Hee University, Seoul, Korea. Electronic address: kjm@khnmc.or.kr.
authors.forename: Jong-Man
authors.initials: JM
authors.lastname: Kang
mesh_terms: D000328:Adult; D000368:Aged; D000768:Anesthesia, General / Q000379:methods; D001999:Bronchoscopy; D004867:Equipment Design; D005260:Female; D005336:Fiber Optic Technology; D006801:Humans; D007442:Intubation, Intratracheal / Q000295:instrumentation* / Q000379:methods*; D008297:Male; D008875:Middle Aged; D011143:Polyvinyl Chloride
chemical_list: D011143:Polyvinyl Chloride
keywords: Insertion depth; Orotracheal intubation; Reinforced tracheal tubes; Tracheal tubes