Medical and biological engineering

, Volume 14, Issue 6, pp 623–628 | Cite as

Abdominal fluid accumulations: measurement using electrical impedance

  • J. C. Denniston
  • L. E. Baker
  • J. H. Kennedy
Article

Abstract

Electrical impedance was used to measure the volume of fluid associated with ascites and haemoperitoneum simulated by the infusion of saline and blood, respectively, in dogs. The change in impedance was approximately 1·1 Ω per 100 ml for saline and 0·2 Ω per 100 ml for blood. The technique was applied to measure surgically-induced haemoperitoneum and effusion in a study of the efficacy of two haemostatic agents. Results from this study indicated a significant decrease in impedance associated with tissue oedema and hyperaemia in addition to free fluid in the abdomen.

Keywords

Electrical impedance Noninvasive Ascites Haemoperitoneum Tissue oedema Hyperaemia 

Sommaire

On a utilisé l'impédance électrique pour mesurer le volume de fluide associé à l'ascite et à l'hémopéritoine simulés par l'infusion de purgatif salin et de sang respectivement, dans des chiens. La variation d'impédance était d'environ 1,1 Ω par 100 ml pour le purgatif salin et de 0,2Ω par 100 ml pour le sang. Cette technique a été pratiquée pour mesurer l'hémopéritoine et l'effusion sollicités chirurgicalement au titre d'une étude de l'efficatité de deux agents hémostatiques. Les résultats de cette étude ont indiqué une chute significative de l'impédance associée à l'oedème des tissus et à l'hyperémie en plus du fluide libre dans l'abdomen.

Zusammenfassung

Elektrische Impedanz wurde zum Messen des Flüssigkeitsvolumens in Verbindung mit Bauchwassersucht und Bluterguß in der Bauchhöhle durch Infusion von Salzwasser bzw. Blut an Hunden gemessen. Die Änderung in der Impedanz betrug etwa. 1,1 Ω pro 100 ml bei Salzlösung und 0,2 Ω pr 100 ml bei Blut. Das Verfahren wurde bei einer Untersuchung der Wirksamkeit von zwei hämostatischen Mitteln zum Messen von durch Operationen herbeigeführten Blutergüssen in der Bauchhöhle und ihrer Ausbreitung verwendet. Die Ergebnisse dieser Untersunchung wiesen auf eine bedeutende Abnahme in der Impedanz, verbunden mit Gewebsödemen und Hyperämie neben freier Flüssigkeit im Bauchraum, hin.

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Copyright information

© International Federation for Medical & Biological Engineering 1976

Authors and Affiliations

  • J. C. Denniston
    • 1
  • L. E. Baker
    • 2
  • J. H. Kennedy
    • 3
  1. 1.U.S. Army Research Institute of Environmental MedicineNatickUSA
  2. 2.Department of PhysiologyBaylor College of Medicine, Texas Medical CentreHoustonUSA
  3. 3.Department of Surgery, Baylor College of MedicineTexas Medical CentreHoustonUSA

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