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Correlation between extraction force during tracheal intubation stylet removal and postoperative sore throat
Tomohiro Kusunoki1, Toshiyuki Sawai1, Nobuyasu Komasawa1
1Department of Anesthesiology, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki, Osaka 569-8686, Japan.
Study Objective:
To examine postoperative sore throat resulting from tracheal intubation stylet removal.
Design:
Prospective cohort study.
Setting:
Operating rooms and hospital ward.
Patients:
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.
Interventions:
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.
Measurements:
The extraction force during stylet removal was measured using a force measuring device. Postoperative sore throat was assessed by an anesthesiologist.
Main 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.
Conclusion:
Postoperative sore throat was significantly related to increased extraction force during stylet removal.
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