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Anesth Analg 2003;96:606-610
© 2003 International Anesthesia Research Society

GENERAL ARTICLES

The BrandtTM Tube System Attenuates the Cuff Deflationary Phenomenon After Anesthesia with Nitrous Oxide

Fujio Karasawa, MD, PhD, Akira Takita, MD, Tomohisa Mori, MD, Isao Takamatsu, MD, Yasushi Kawatani, MD, and Takashi Oshima, MD

Department of Anesthesiology, National Defense Medical College, Tokorozawa, Japan

Address correspondence to Dr. F. Karasawa, Department of Anesthesiology, National Defense Medical College, 3-2 Namiki, Tokorozawa, Saitama 359-8513, Japan. Address e-mail to karasawa{at}me.ndmc.ac.jp

The BrandtTM tube system can limit excessive cuff pressure during nitrous oxide (N2O) anesthesia, but there is a lack of data assessing whether the BrandtTM tube system avoids cuff deflation after cessation of N2O administration. In this study, we recorded air-filled cuff pressures of the Mallinckrodt BrandtTM or Hi-ContourTM (control) tracheal tubes (Mallinckrodt, Athlone, Ireland) during 67% N2O anesthesia and the cuffs were aspirated if the cuff pressure exceeded 22 mm Hg; 180 min later, O2 was substituted for N2O. The cuff pressure of both groups significantly decreased after N2O anesthesia but the time required for the cuff pressure to return to the initial pressure was longer in the Brandt group than in the control group (76.5 ± 35.2 min and 36.5 ± 18.1 min, respectively; P = 0.03). The incidence of air leaks was more frequent in the control group than in the Brandt group (P = 0.015); changes in intracuff N2O were small in the Brandt group (6.6 ± 1.2% to 3.4 ± 0.9%) compared with those in the control group (46.2 ± 3.8% to 18.6 ± 5.6%). Therefore, the BrandtTM tube system attenuates the cuff deflationary phenomenon after N2O anesthesia, whereas repeated cuff deflation during N2O anesthesia causes cuff deflation after cessation of N2O, resulting in a possible risk of air leaks.

IMPLICATIONS: We demonstrated that the BrandtTM tube system attenuates a decrease in cuff pressure after cessation of nitrous oxide (N2O) administration, whereas a method of repeated cuff deflation to avoid excessive pressure during N2O anesthesia causes deflationary phenomenon of the cuff after cessation of N2O administration, resulting in possible risk of air leaks.






Lippincott, Williams & Wilkins Anesthesia & Analgesia® is published for the International Anesthesia Research Society® by Lippincott Williams & Wilkins with the assistance of Stanford University Libraries' HighWire Press®. Copyright 2006 by the International Anesthesia Research Society. Online ISSN: 1526-7598   Print ISSN: 0003-2999 HighWire Press
Copyright © 2003 by the International Anesthesia Research Society.