Design of a microcontroller based Cole-Cole impedance meter for testing biological tissues

Hakan Solmaz, Yekta Ülgen, Murat Tümer

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

13 Citations (Scopus)

Abstract

Complex impedance measurement of biological systems is gaining wide popularity in determining the pathological and physiological status of tissues in research areas such as; body fat content, blood freshness, tissue ischemia, skin hydration, and etc. In this study we designed a four-probe, multi-frequency, portable Cole-Cole impedance meter based on the magnitude-ratio and phase-difference detection principles. The system is built around a sine-wave generator, a voltage controlled current source, a phase-gain detector and a microcontroller unit. The Cole-Cole parameters, namely R0, R, fc and α and the extracellular fluid and intracellular fluid resistances, Re and Ri are also calculated and directly displayed by the device. Device accuracy is checked against the HP 4284A LCR meter under different RC test loads that simulate physiological measurements.

Original languageEnglish
Title of host publicationWorld Congress on Medical Physics and Biomedical Engineering
Subtitle of host publicationDiagnostic and Therapeutic Instrumentation, Clinical Engineering
PublisherSpringer Verlag
Pages488-491
Number of pages4
Edition7
ISBN (Print)9783642038846
DOIs
Publication statusPublished - 2009
Externally publishedYes
EventWorld Congress on Medical Physics and Biomedical Engineering: Diagnostic and Therapeutic Instrumentation, Clinical Engineering - Munich, Germany
Duration: 7 Sept 200912 Sept 2009

Publication series

NameIFMBE Proceedings
Number7
Volume25
ISSN (Print)1680-0737

Conference

ConferenceWorld Congress on Medical Physics and Biomedical Engineering: Diagnostic and Therapeutic Instrumentation, Clinical Engineering
Country/TerritoryGermany
CityMunich
Period7/09/0912/09/09

Keywords

  • Bioimpedance
  • Cole-Cole parameters
  • Magnitude-ratio and phase-difference detection

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