This article is cited in 2 papers

Brief Communications

Mass-spectrometric monitoring of the stress reaction during anesthesia

A. Yu. Elizarov^a, A. I. Levshankov^b, I. I. Faizov^b, A. V. Shchegolev<sup>b

a</sup> Ioffe Institute, St. Petersburg
^b Kirov Medical Force Academy, St. Petersburg

Abstract: Clinical testing data for a mass-spectrometric method of estimating the patient’s stress reaction to an injury done during anesthesia are presented. The essence of the method is monitoring the respiratory coefficient, which is defined as ratio $N$ of the expiratory mass concentration of CO$_2$ to the inspiratory mass concentration of O$_2$ at each breathing cycle. For on-line monitoring of $N$, an electron ionization mass spectrometer connected to the breathing circuit of an inhalational anesthesia machine is used. Estimates of the anesthesia adequacy obtained with this method are compared with those obtained with the method that analyzes induced acoustic encephalographic potentials. It is shown that the method suggested is more sensitive to the level of the patient’s stress reaction during anesthesia than the induced potential method.

Received: 18.09.2012
Accepted: 11.12.2012

 English version: Technical Physics, 2013, 58:10, 1525–1528

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