JOURNAL ARTICLE
RANDOMIZED CONTROLLED TRIAL

[Changes in intracuff pressure of endotracheal tubes permeable or resistant to nitrous oxide and incidence of postoperative sore throat]

Koji Sato, Makoto Tanaka, Toshiaki Nishikawa
Masui. the Japanese Journal of Anesthesiology 2004, 53 (7): 767-71
15298243

BACKGROUND: We assessed the nitrous oxide (N2O) gas-barrier properties of a new endotracheal tube cuff, the Profile Soft-Seal Cuff (Resistant: R) (Sims Portex, Kent, UK).

METHODS: The tracheas of randomly selected patients were intubated with the Profile Cuff (Permeable: P) (Sims Portex) tuble or with Portex Soft-Seal Cuff (R) (n=20 each) endotracheal tube. Cuffs were inflated with air, and intracuff pressure was measured during anesthesia using 67% N2O. Postoperative sore throat was assessed. In addition, the volume-pressure relationship of the cuff was determined in vitro.

RESULTS: Cuff pressure increased gradually during anesthesia in both groups. The mean cuff pressure of the group R was significantly lower than that of the group P from 10 minutes to 230 minutes. The inflated gas and the deflated gas were not significantly different in both groups. The incidence of postoperative sore throat was not significantly different between the two groups. In vitro, the mean cuff pressure of the group R was significantly lower than that of the group P.

CONCLUSIONS: The difference of cuff pressure is considered due to the difference in cuff compliance.

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