title: The supine-to-prone position change induces modification of endotracheal tube cuff pressure accompanied by tube displacement.
abstract: OBJECTIVE
  To determine whether the supine-to-prone position change displaced the endotracheal tube (ETT) and, if so, whether the displacement related to this change modified ETT cuff pressure.
  
  
  METHODS
  Prospective study.
  
  
  METHODS
  Operating room of a university hospital.
  
  
  METHODS
  132 intubated, adult, ASA physical status 1, 2, and 3 patients undergoing lumbar spine surgery.
  
  
  METHODS
  After induction of anesthesia, each patient's trachea was intubated. The insertion depth of each ETT was 23 cm for men and 21 cm for women at the upper incisors. In the supine position and after the supine-to-prone position change with the head rotated to the right, the length from the carina to ETT tip and ETT cuff pressure were measured.
  
  
  RESULTS
  After the supine-to-prone position change, 91.7% patients had ETT tube displacement. Of these, 48% of patients' ETT moved ≥ 10 mm, whereas 86.3% of patients had changes in tube cuff pressure. There was a slight but significant correlation between ETT movement and change in cuff pressure. Depending on the position change, ETT cuff pressure decreased and the ETT tended to withdraw.
  
  
  CONCLUSIONS
  After the supine-to-prone position change, patients had ETT tube displacement. Such ETT movement may be accompanied by a decrease in cuff pressure.
authors: Department of Anesthesiology, Wakayama Medical University, Wakayama 641-0012, Japan.
authors: Toshiyuki
authors: T
authors: Minonishi
authors: Hiroyuki
authors: H
authors: Kinoshita
authors: Michiko
authors: M
authors: Hirayama
authors: Shinji
authors: S
authors: Kawahito
authors: Toshiharu
authors: T
authors: Azma
authors: Noboru
authors: N
authors: Hatakeyama
authors: Yoshihiro
authors: Y
authors: Fujiwara
mesh_terms: D000368:Aged; D000768:Anesthesia, General / Q000379:methods*; D005260:Female; D019416:Head Movements / Q000502:physiology*; D006685:Hoarseness / Q000209:etiology; D006801:Humans; D007442:Intubation, Intratracheal / Q000009:adverse effects / Q000295:instrumentation*; D008159:Lumbar Vertebrae / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D009038:Motion; D056888:Patient Positioning / Q000379:methods*; D010612:Pharyngitis / Q000209:etiology; D011183:Postoperative Complications; D011312:Pressure; D016684:Prone Position / Q000502:physiology; D011446:Prospective Studies; D016683:Supine Position / Q000502:physiology