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In Vivo and In Situ Ischemic Tissue Characterization Using Electrical Impedance Spectroscopy a
Author(s) -
CASAS O.,
BRAGÓS R.,
RIU P. J.,
ROSELL J.,
TRESÀNCHEZ M.,
WARREN M.,
RODRIGUEZSINOVAS A.,
CARREÑO A.,
CINCA J.
Publication year - 1999
Publication title -
annals of the new york academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.712
H-Index - 248
eISSN - 1749-6632
pISSN - 0077-8923
DOI - 10.1111/j.1749-6632.1999.tb09448.x
Subject(s) - in vivo , in situ , ischemia , dielectric spectroscopy , electrical impedance , biomedical engineering , spectroscopy , materials science , chemistry , analytical chemistry (journal) , medicine , biology , electrode , physics , cardiology , electrochemistry , chromatography , electrical engineering , engineering , microbiology and biotechnology , organic chemistry , quantum mechanics
A bstract : The investigation of processes of ischemia in different organ tissues is very important for the development of methods of protection and preservation during surgical procedures. Electrical impedance spectroscopy was used to distinguish between different tissues and their degree of ischemia. We describe mathematical methods used to adjust experimental data to Cole‐Cole models for one‐circle and two‐circle impedance loci and a study of the main parameters for representing the behavior of ischemia in time. In vivo and in situ postmortem measurements of different tissues from pigs are shown in the 100 Hz to 1 MHz range. The Cole parameters that best characterize the ischemia are R 0 and f c .