Dielectric spectrogram for evaluating ischemic microstructural changes of the liver in simple cold preservation

Area of Science:

• Biophysics
• Transplantation Science
• Cell Biology

Background:

• Monitoring ischemic liver injury is crucial in liver transplantation.
• Previous work linked dielectric properties to adenosine triphosphate levels during liver preservation.
• The basis for changes in dielectric properties during preservation was unclear.

Purpose of the Study:

• To investigate the relationship between dielectric parameters and microstructural changes in rat liver tissues during cold preservation.
• To understand the underlying mechanisms of dielectric property alterations during liver preservation.
• To establish a foundation for using dielectric properties to monitor liver preservation quality.

Main Methods:

• Serial measurements of conductivity decrease and relative permittivity increase in rat livers.
• Quantification of cellular and extracellular components using microscopy and image analysis.
• Evaluation of correlations between dielectric parameters and tissue microstructural changes.

Main Results:

• A significant positive linear and exponential correlation was observed between decreased conductivity and decreased extracellular components (P < 0.01).
• A significant positive linear and exponential correlation was found between increased relative permittivity and increased cellular components (P < 0.01).

Conclusions:

• Serial changes in tissue conductivity and relative permittivity reflect alterations in liver tissue microstructures during cold preservation.
• These findings provide a basis for non-invasive monitoring of liver tissue integrity during preservation.
• Understanding these relationships can improve outcomes in liver transplantation by optimizing preservation strategies.