Adsorption of desflurane from the scavenging system during high-flow and minimal-flow anaesthesia by zeolites

European Journal of Anaesthesiology
J JänchenH Stach

Abstract

Application of high-silica zeolites in a special adsorber allows complete selective adsorption of the inhalation anaesthetic desflurane from the outlet port of the scavenging system of the anaesthesia machine. In comparison with charcoal filters, zeolites allow almost complete desorption at moderate temperatures followed by condensation of the desflurane to the liquid phase. The adsorption of scavenged desflurane by zeolites was measured in 13 patients. The duration of the anaesthesia was between 70 and 130 min. A minimal-flow regime (0.5 L min-1 fresh gas inflow) was used for maintenance in seven patients and a higher-flow regime (3 L min-1 fresh gas flow) was used for maintenance in six patients. In minimal-flow anaesthesia, 62% of the delivered desflurane was adsorbed by the zeolite while 86% of the delivered desflurane was adsorbed in higher-flow anaesthesia. Preliminary results show that about 85% of the adsorbed desflurane could be recovered as liquid with high purity via desorption.

References

Mar 1, 1991·Anesthesiology·N YasudaA Fassoulaki
Oct 19, 1989·Nature·A C BrownR P Wayne

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Citations

Jun 6, 2012·CMAJ : Canadian Medical Association Journal = Journal De L'Association Medicale Canadienne·Yoan K KagomaDouglas Naudie
Aug 8, 2015·Chemical Communications : Chem Comm·Teng-Hao ChenOgnjen Š Miljanić
Jun 6, 2015·Korean journal of anesthesiology·Seok Young SongTaeha Ryu
Oct 11, 2002·Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie·D John DoyleFred Cashin
Oct 25, 2014·Journal of Neurosurgery·Leland RogersMichael A Vogelbaum
Oct 27, 2007·Neurosurgical Focus·Leland Rogers, Minesh Mehta
Jun 2, 2012·Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie·Metha BrattwallJan Jakobsson
Aug 30, 2006·International Journal of Audiology·Adrian Fuente, Bradley McPherson
Jun 18, 2002·The American Journal of Chinese Medicine·Hareka WatanabeJong-Chol Cyong

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