• Tatsuo Kadoya, Eiji Sakamoto, Toshinori Yamamoto, Yuki Kinoshita, Munehiro Shiraishi, and Hirofumi Uehara.
• Masui. 2014 Dec 1;63(12):1329-33.

BackgroundPreviously, we reported that pre- and postoperative measurement of the neck circumference might be an easy and useful measure for prediction of postoperative airway obstruction in shoulder arthroscopy. However, it is suggested that airway pressure to cause a cuff leak around the tracheal tube in a cuff deflated condition (cuff leak pressure) is a predictor of postoperative airway obstruction. We studied a correlation between the neck circumference and the cuff leak pressure.MethodsForty patients undergoing shoulder arthroscopy in the beach-chair position were included in this study. There were 30 male and 10 female patients. All patients' neck circumference and cuff leak pressure were compared pre- and postoperatively and with each other.ResultsThere was a strong correlation between the increase of neck circumference and the increase of cuff leak pressure.ConclusionsThe rate of increase in neck circumference shows the swelling of external tissue of the neck. However, it may not reflect the swelling of the internal tissue containing pharynx, larynx and retrotracheal space. Alternatively, pre- and postoperative measurement of the cuff leak pressure could be a more substantial predictor of postoperative airway obstruction than the rate of increase in neck circumference.

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