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Dielectric properties of human red blood cells in suspension at radio frequencies
Author(s) -
Lu Yongjun,
Yu Jue,
Ren Yanhua
Publication year - 1994
Publication title -
bioelectromagnetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.435
H-Index - 81
eISSN - 1521-186X
pISSN - 0197-8462
DOI - 10.1002/bem.2250150612
Subject(s) - suspension (topology) , hematocrit , materials science , electrical impedance , transmission line , dielectric , adapter (computing) , permittivity , coaxial , human blood , conductivity , optics , biomedical engineering , acoustics , nuclear magnetic resonance , analytical chemistry (journal) , optoelectronics , chemistry , electrical engineering , medicine , physics , chromatography , engineering , mathematics , physiology , homotopy , pure mathematics
Dielectric properties of human red blood cells (RBCs) in suspension (hematocrit 50%) from 243 healthy persons (120 males, 123 females) were measured at 25 °C in a frequency range of 1–500 MHz, with a coaxial transmission line reflection method (one‐side measurement). The measuring system, controlled by an IBM‐PC computer, was composed of a network analyzer (HP4195A), an impedance test adapter (HP41951‐61001), a coaxial line sensor, and a temperature‐controlling set. The data measured revealed a statistically significant age dependence, with a critical age of about 49 years, above which permittivity and conductivity of human RBCs in suspension decreased significantly. © 1994 Wiley‐Liss, Inc.