Medical and biological engineering

, Volume 13, Issue 4, pp 523–530 | Cite as

The continuous measurement of resistivity and permittivity of human blood plasma during coagulation

  • J. A. Connelly
  • M. J. Buckler
Article

Abstract

An instrumentation system is described which is useful for providing a continuous monitor of resistivity and permittivity changes in human blood plasma during coagulation. The system design and calibration are explained and experimental techniques for working with the chemically active blood plasma are discussed. A technique for testing samples is developed and experimental results from 300 test runs are presented and interpreted.

Keywords

Electrical impedance of blood Resistivity measurement of blood Permittivity measurement of blood Blood coagulation Dielectric constant of blood 

Sommaire

On décrit un système instrumental utile pour fournir un contrôle continu des changements de résistivité et de constante diélectrique du plasma sanguin humain pendant la coagulation. On explique la conception et le calibrage du système et on étudie les techniques utilisées pour les travaux sur des plasmas sanguins chimiquement actifs. On a développé une technique pour tester les échantillons et on expose les résultats de 300 essais.

Zusammenfassung

Es wird eine Instrumentenserie beschrieben, die sich zur Dauerüberwachung von Änderungen am spezifischen Widerstand und an der Dielektrizitätskonstante im Blutplasma des Menschen während der Koagulation einsetzen läßt. System, Konstruktion und Eichung werden beschrieben und auch experimentelle Verfahren für die Arbeit mit chemisch aktivem Blutplasma werden besprochen. Ein Verfahren zum Prüfen von Proben wird entwickelt, und Ergebnisse von 300 Experimenten werden vorgestellt.

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References

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Copyright information

© International Federation for Medical & Biological Engineering 1975

Authors and Affiliations

  • J. A. Connelly
    • 1
  • M. J. Buckler
    • 2
  1. 1.The Georgia Institute of TechnologySchool of Electrical EngineeringAtlantaUSA
  2. 2.Bell Telephone LaboratoriesHolmdelUSA

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