Dielectric Spectroscopy of Human Blood

Bernal‐Alvarado, J.; Sosa, M.; Morales, Libby; Hernández, Leonardo; Hernandez-Cabrera, Francisco; Palomares, P.; Juárez, P.; Ramı́rez, R.

doi:10.1063/1.1615125

Cited by 2 publications

(1 citation statement)

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“…Since the blood and bloodstream sensitively reflect various conditions of human body, it is generally expected to play as an index for examinations of diseases. Various works on dielectric properties of blood [1][2][3][4][5][6][7][8][9][10][11] have been reported in the broad frequency range in vitro. According to those works, a Maxwell-Wagner interfacial polarization contributed by Red Blood Cell (RBC) with micrometer-order size of particles can be observed at around 10 MHz.…”

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confidence: 99%

Effects of Blood Stream on Non-Invasive Dielectric Spectroscopy Measurements for Biological Tissues

Saito

Asano

Saito

et al. 2020

Trans. Mat. Res. Soc. Japan

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We performed complex permittivity measurements for various parts on the flexor surface of wrist by non-invasive dielectric spectroscopy technique using flat-end coaxial electrodes terminated by the tissues with different conditions of bloodstream. The dielectric measurements evaluated dynamic behaviors of ions, water, biomolecules, and various cells including red blood cells in bloodstream with dielectric relaxation processes. The dielectric relaxation curve thus obtained characterized each living tissue and indicated a decreasing tendency of the restoration from the high heart rate and the blood pressure after exercise. Using curve fitting analysis of the relaxation curve with several Cole-Cole functions, one relaxation process was identified as a process reflecting the condition of bloodstream. The present work confirms that the non-invasive dielectric measuring technique using the flat-end coaxial electrode with the fringing electric field quantitatively characterizes the condition of living tissues, and it can be an effective tool for pathology of bloodstream in vivo.

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