Development of an oximeter for neurology

A Aleinik,Z Serikbekova,I Zhukova,M Nikitina,N Zhukova

doi:10.1088/1757-899x/135/1/012002

Abstract

Cerebral desaturation can occur during surgery manipulation, whereas other parameters vary insignificantly. Prolonged intervals of cerebral anoxia can cause serious damage to the nervous system. Commonly used method for measurement of cerebral blood flow uses invasive catheters. Other techniques include single photon emission computed tomography (SPECT), positron emission tomography (PET), magnetic resonance imaging (MRI). Tomographic methods frequently use isotope administration, that may result in anaphylactic reactions to contrast media and associated nerve diseases. Moreover, the high cost and the need for continuous monitoring make it difficult to apply these techniques in clinical practice. Cerebral oximetry is a method for measuring oxygen saturation using infrared spectrometry. Moreover reflection pulse oximetry can detect sudden changes in sympathetic tone. For this purpose the reflectance pulse oximeter for use in neurology is developed. Reflectance oximeter has a definite advantage as it can be used to measure oxygen saturation in any part of the body. Preliminary results indicate that the device has a good resolution and high reliability. Modern applied schematics have improved device characteristics compared with existing ones.

Highlights

During the surgery a reduction of oxygen saturation of the brain can occur, with the other controlled parameters change slightly
General anesthesia has become safer in recent years due to the emergence of more reliable methods of control [1]
The aim of this study is to investigate the use of the reflectance pulse oximeter for remotely detecting a sudden sympathetic system changes

Summary

Introduction

During the surgery a reduction of oxygen saturation of the brain can occur, with the other controlled parameters change slightly. General anesthesia has become safer in recent years due to the emergence of more reliable methods of control [1]. These technologies make it possible to identify early onset of adverse events and significantly reduce morbidity and mortality from the use of anesthetics [2, 3]. Used method for measurement of cerebral blood flow is the Kety-Schmidt method [4]. In this case, the patient inhales a mixture of O2 and N2O, and blood is sampled using invasive catheters.

Published under licence by IOP Publishing Ltd

Results and discussion