title: Correlation between extraction force during tracheal intubation stylet removal and postoperative sore throat.
abstract: OBJECTIVE
  To examine postoperative sore throat resulting from tracheal intubation stylet removal.
  
  
  METHODS
  Prospective cohort study.
  
  
  METHODS
  Operating rooms and hospital ward.
  
  
  METHODS
  A total of 50 American Society of Anesthesiologists physical status 1 and 2 patients who underwent elective abdominal and/or orthopedic surgery under general anesthesia.
  
  
  METHODS
  Patients were allocated to 2 groups: those who developed sore throat postoperatively (ST group) and those who did not (NST group). Comparative analysis of these 2 groups was performed to identify risk factors of the development of sore throat.
  
  
  METHODS
  The extraction force during stylet removal was measured using a force measuring device. Postoperative sore throat was assessed by an anesthesiologist.
  
  
  RESULTS
  Nine patients (18%) complained of postoperative sore throat. Increased extraction force (P=.0054; odds ratio, 1.84; 95% confidence interval, 1.20-2.84) was the only significant risk factor for the development of postoperative sore throat. An extraction force of >10.3N was determined as a cutoff for developing postoperative sore throat.
  
  
  CONCLUSIONS
  Postoperative sore throat was significantly related to increased extraction force during stylet removal.
authors.affiliation: Department of Anesthesiology, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki, Osaka 569-8686, Japan.
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Kusunoki
authors.affiliation: Department of Anesthesiology, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki, Osaka 569-8686, Japan. Electronic address: ane026@osaka-med.ac.jp.
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Sawai
authors.affiliation: Department of Anesthesiology, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki, Osaka 569-8686, Japan.
authors.forename: Nobuyasu
authors.initials: N
authors.lastname: Komasawa
authors.affiliation: Department of Anesthesiology, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki, Osaka 569-8686, Japan.
authors.forename: Yuichiro
authors.initials: Y
authors.lastname: Shimoyama
authors.affiliation: Department of Anesthesiology, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki, Osaka 569-8686, Japan.
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Minami
mesh_terms: D000005:Abdomen / Q000601:surgery; D000328:Adult; D000368:Aged; D060666:Airway Extubation / Q000009:adverse effects* / Q000379:methods; D000768:Anesthesia, General / Q000379:methods; D020878:Device Removal / Q000009:adverse effects / Q000379:methods; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D019637:Orthopedic Procedures; D010612:Pharyngitis / Q000209:etiology*; D011183:Postoperative Complications; D011446:Prospective Studies; D012307:Risk Factors; D013314:Stress, Mechanical
keywords: Postoperative sore throat; Stylet; Tracheal intubation