Korean J Anesthesiol Search


Korean Journal of Anesthesiology 2006;50(6):S1-S7.
DOI: https://doi.org/10.4097/kjae.2006.50.6.S1   
Factors Affecting the Intracuff Pressure of Wire-reinforced Endotracheal Tubes during General Anesthesia Using Nitrous Oxide.
Sinyoung Kang, Hee Jung Baik, Yun Jin Kim, Jong Hak Kim
Department of Anesthesiology, Ewha Womans University Medical Center, College of Medicine, Ewha Womans University, Seoul, Korea. baikhj@ewha.ac.kr.
We evaluated the factors affecting the need for cuff deflation to maintain intracuff pressure (P(cuff)) below 22 mmHg in two types of wire-reinforced endotracheal tubes; type A: Safety-Flex(TM) (Mallinckrodt, Athlone, Ireland) and type B: Insung(R) (Insung, Seoul, Korea).
Eighty patients were randomly divided into four groups (n = 20 for each); Group F-A: female, type A; Group F-B: female, type B; Group M-A: male, type A; Group M-B: male, type B. Sealing volume and sealing pressure (SP) were measured. Whenever Pcuff reached 22 mmHg during N2O administration, the cuff was deflated to SP. Elapsed time to first deflation (1-CP22) and deflation frequencies were recorded.
Specific cuff compliance (C(cuff)) was higher in type A than that in type B (P < 0.05). More patients in Group F-B and M-B needed deflation than those in Group F-A and M-A, respectively (P < 0.05). 1-CP22 in patients intubated with type B was shorter than with type A (P < 0.05). In both tubes type A and B, SP was higher in patients who needed deflation compared to ones that did not (P < 0.05).
Use of wire-reinforced tubes with high C(cuff) decreases the frequency of deflation. Low SP also reduces the need for cuff deflation to keep the P(cuff) below 22 mmHg during N2O anesthesia.
Key Words: endotracheal intubation; general anesthesia; nitrous oxide


Browse all articles >

Editorial Office
101-3503, Lotte Castle President, 109 Mapo-daero, Mapo-gu, Seoul 04146, Korea
Tel: +82-2-792-5128    Fax: +82-2-792-4089    E-mail: journal@anesthesia.or.kr                

Copyright © 2024 by Korean Society of Anesthesiologists.

Developed in M2PI

Close layer
prev next