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Electrical properties of extracted rat liver tissue
Y Konishi1, T Morimoto, Y Kinouchi
1Second Department of Surgery, School of Medicine, University of Tokushima, Japan.
Research in Experimental Medicine. Zeitschrift Fur Die Gesamte Experimentelle Medizin Einschliesslich Experimenteller Chirurgie
|January 1, 1995
Summary
Electrical bio-impedance effectively monitors ischemia-induced liver disturbances in rats. Changes in extracellular resistance (Re) and cell membrane capacitance (Cm) correlate with incubation temperature, aiding in tissue damage assessment.
Area of Science:
- Physiology
- Biophysics
- Medical Engineering
Background:
- Ischemia significantly impacts liver tissue function and structure.
- Understanding cellular changes during ischemia is crucial for diagnosis and treatment.
- Electrical bio-impedance offers a non-invasive method to assess tissue properties.
Purpose of the Study:
- To investigate ischemia-induced disturbances in rat liver tissue using electrical bio-impedance.
- To correlate changes in electrical properties with incubation temperature and time post-extraction.
- To explore the potential of electrical bio-impedance for estimating liver tissue structural changes during ischemia.
Main Methods:
- Continuous measurement of electrical bio-impedance over 6 hours using the 4-electrode method.
- Analysis of six male Wistar rat liver samples at various incubation temperatures.
- Calculation of extracellular resistance (Re), intracellular resistance (Ri), and cell membrane capacitance (Cm) via curve-fitting.
Main Results:
- Extracellular resistance (Re) peaked early and then decreased, showing a negative correlation with incubation temperature.
- Cell membrane capacitance (Cm) followed a similar pattern to Re, also negatively correlating with temperature.
- Intracellular resistance (Ri) initially decreased, then increased, correlating with cell swelling and lysis.
Conclusions:
- Electrical bio-impedance parameters (Re, Ri, Cm) reflect cellular changes during ischemia, including volume shifts and cell membrane integrity.
- The observed electrical property changes suggest potential for estimating liver tissue structural alterations due to ischemia.
- Incubation temperature significantly influences the dynamics of electrical property changes in ischemic liver tissue.