Authors: Austin, Paul N.¹; Meekins, Alan²; Lange, Eric³; Levine, Eugene¹

Source: Military Medicine, Volume 170, Number 4, April 2005 , pp. 291-294(4)

Publisher: AMSUS - Association of Military Surgeons of the U.S.

Abstract:

The Universal Portable Anesthesia Complete is supplied with a 12-inch oxygen reservoir. Previous work suggested that using a longer (greater-volume) reservoir results in a greater inspired oxygen concentration. This study assessed the work of breathing imposed by lengths of reservoir tubing (18, 30, and 48 inches) during simulated spontaneous breathing of an adult anesthetized with isoflurane. Peak negative pressure (PNP) was used as a surrogate of imposed work. There were no clinically significant differences between the PNP with the supplied reservoir tubing and the three lengths of 22-mm corrugated tubing. The PNP ranged between -1.5 and -1.7 cm H₂O for the anesthetized condition and between -4.3 and -4.7 cm H₂O for the condition modeling emergence from general anesthesia. The morphologic features of the pressure-volume curves corroborated these findings and revealed that little imposed work was attributable to the length of reservoir tubing. These findings should help future investigators seeking to modify the Universal Portable Anesthesia Complete.

Document Type: Research article

Affiliations: 1: Graduate School of Nursing, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, MD 20814-4799. 2: William Beaumont Army Medical Center, 5005 North Piedras Street, El Paso, TX 79920-5001. 3: Madigan Army Medical Center, Building 9040 Fitzsimmons Drive, Tacoma, WA 98431.

Publication date: 2005-04-01

More about this publication?

• Military Medicine is the Association's official monthly journal. The objective of the Journal is to promote awareness of Federal medicine by providing a forum for responsible discussion of common ideas and problems relevant to Federal healthcare. Its mission is: To increase healthcare education by providing scientific and other information to its readers; to facilitate communication; and to offer a prestige publication for members' writings.
  
  Military Medicine's 5-year Impact Factor: 1.061
  
  
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