Electroimpedance Spectroscopy for the Measurement of the Dielectric Properties of Sodium Chloride Solutions at Different Glucose ConcentrationsReportar como inadecuado




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Journal of Spectroscopy - Volume 2013 2013, Article ID 571372, 6 pages -

Research ArticleInstitute of Biomedical Engineering, National Research Council, Corso Stati Uniti 4, 35127 Padova, Italy

Received 20 April 2012; Revised 20 July 2012; Accepted 24 July 2012

Academic Editor: Zhifeng Shao

Copyright © 2013 Stefano Sbrignadello et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We investigated possible variations of impedance values in samples of sodium chloride solution sodium chloride 0.9% with glucose at different concentrations, ranging from 5000 to around 75 mg-dL. The sodium chloride solution either saline physiological solution was chosen since it has similarities to blood but no cell components, which may be confounding factors in this study. Special focus was on the effect of stirring and of temperature variations on the impedance spectrum of samples at different glucose concentrations. We found that variations in glucose concentration directly affect the impedance modulus of the sample both in static conditions and in dynamic conditions due to stirring, as well as at both room temperature and at increased temperature. In fact, even if the impedance variations were often small around 3-4 m per mg-dL, they were usually clearly measurable. These findings may be the basis for possible development of a new approach, based on impedance technology, for the noninvasive monitoring of glycaemia.





Autor: Stefano Sbrignadello, Andrea Tura, and Paolo Ravazzani

Fuente: https://www.hindawi.com/



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