Ex vivo electrical impedance measurements on excised hepatic tissue from human patients with metastatic colorectal cancer

  • Subramaniam S
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Abstract

Point-wise ex vivo electrical impedance spectroscopy measurements were conducted on excised hepatic
tissue from human patients with metastatic colorectal cancer using a linear four-electrode impedance
probe. This study of 132 measurements from 10 colorectal cancer patients, the largest to date,
reports that the equivalent electrical conductivity for tumor tissue is significantly higher than
normal tissue ( p 100 Hz–1 MHz. Difference in tissue electrical permittivity is also found to be statistically
significant across most frequencies. Furthermore, the complex impedance is also reported for both
normal and tumor tissue. Consistent with trends for tissue electrical conductivity, normal tissue
has a significantly higher impedance than tumor tissue ( p capacitive phase shift (33° for normal liver tissue in contrast to 10° for tumor tissue).

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Authors

  • S Prakash and M P Karnes and E K Sequin and J D West and C L Hitchcock and S D Nichols and M Bloomston and S R Abdel-Misih and C R Schmidt and E W Martin Jr and S P Povoski and V V Subramaniam

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