Predictability of Dielectric Properties for Ischemic Injury of the Skeletal Muscle before Reperfusion

Miyauchi, Tadamasa; Sasaki, Eisaku; Hayashi, Masatashi; Mori, Yoshio; Murakawa, Shinji; Takagi, Hisato; Yasuda, Hiroyuki; Kumada, Yoshitaka; Iwata, Hiroji

doi:10.1006/jsre.1999.5676

Cited by 5 publications

(4 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There is also potential for non-invasive imaging, provided that the electrical characteristics of both normal and scar tissue are well defined. Schafer et al (1999) and Miyauchi et al (1999) observed changes in the α and β dispersions of normal and ischaemic skeletal muscle. Schwartzman et al (1999) investigated the region intermediate between healthy and infracted tissue in the case of chronically infracted ventricular myocardium.…”

Section: Musclementioning

confidence: 95%

Electrical conductivity of tissue at frequencies below 1 MHz

Gabriel¹,

Peyman²,

Grant³

2009

Phys. Med. Biol.

606

460

View full text Add to dashboard Cite

A two-pronged approach, review and measurement, has been adopted to characterize the conductivity of tissues at frequencies below 1 MHz. The review covers data published in the last decade and earlier data not included in recent reviews. The measurements were carried out on pig tissue, in vivo, and pig body fluids in vitro. Conductivity data have been obtained for skeletal and myocardial muscle, liver, skull, fat, lung and body fluids (blood, bile, CSF and urine). A critical analysis of the data highlights their usefulness and limitations and enables suggestions to be made for measuring the electrical properties of tissues.

show abstract

Section: Musclementioning

confidence: 95%

Electrical conductivity of tissue at frequencies below 1 MHz

Gabriel¹,

Peyman²,

Grant³

2009

Phys. Med. Biol.

606

460

View full text Add to dashboard Cite

show abstract

“…The most popular method of dielectric monitoring for biological systems relies upon recording the dielectric constant and/or conductivity at a fixed frequency as a function of time. This method has frequently been used in clinical studies of the effect of ischaemia on biological tissues (Gersing 1998, Miyauchi et al 1999, Schäfer et al 1999 because it is simple and does not require any sophisticated equipment. Figure 2 shows the time evolution of the relative permittivity and conductivity, at both 10 kHz and 100 kHz, of the rat liver immersed in cold (4 • C) UW solution.…”

Section: Time-chase Of ε and κ At Fixed Frequenciesmentioning

confidence: 99%

“…In the past few years, the dielectric characterization of biological tissues has attracted increasing attention from both basic science researchers and bioengineers (Alanen et al 1998, Blad 1998, Foster and Schwan 1996, Gabriel et al 1996, Kyle et al 1999, Naito et al 1998, Nopp et al 1993, Ollmar 1999, Raicu et al 1998a,b, 2000. The method has gained popularity, particularly in monitoring the properties of organs undergoing normothermic surgical procedures or of organs subjected to hypothermic preservation prior to their transplantation (Gersing 1998, Miyauchi et al 1999, Schäfer et al 1999. In such instances, dielectric spectroscopy is a method highly suitable for assessing the progressive damage induced by ischaemia (i.e.…”

Section: Introductionmentioning

confidence: 99%

Multifrequency method for dielectric monitoring of cold-preserved organs

Raicu¹,

Saibara²,

Irimajiri³

2000

Phys. Med. Biol.

View full text Add to dashboard Cite

To answer a growing need for non-invasive monitoring of biological organs, we have developed an automated system capable of repeated dielectric measurements over the frequency range 10 kHz-100 MHz. Further, we propose a novel method of data analysis that may convert the acquired, individual dispersion curves into a diagram of the time course of specific phenomenological parameters, such as the characteristic frequency. By using this new procedure, unattended, long-term monitoring of temporal changes in the dielectric behaviour of excised liver lobes stored at 4 degrees C was successfully realized. The 'multifrequency' method presented here was definitely superior to the conventional 'fixed-frequency' method in providing reliable results.

show abstract

“…Many experimental techniques such as chemical [3,18], mechanical [7,6], Raman spectroscopy [4,8] and dielectric spectroscopy [2,10,12,16,17] offer the possibility of detecting and diagnosing arterial disease. The results of these studies reflect the morphological structures of the arterial wall in the normal and pathologic states.…”

Section: Introductionmentioning

confidence: 99%

Dielectric relaxation of a protein–water system in atherosclerotic artery wall

2007

View full text Add to dashboard Cite

Measurements of the dielectric properties of healthy and atherosclerotic human artery tissues were made in the frequency range of 100 Hz-100 kHz and temperatures from 22 to 260 degrees C. The temperature dependencies of the dielectric parameters for healthy tissues reveal distinctively the temperature ranges corresponding to the release of water up to 200 degrees C and the decomposition processes of elastin and collagen, above this temperature. The influence of atherosclerosis on the dielectric properties of artery tissues is significant in the whole temperature range. The relative permittivity for atherosclerotic tissues at the same temperature is much lower than for the healthy tissues. This suggests, that the polarization in atherosclerotic tissues due to protons hopping between a smaller number of sites than in healthy tissues, as a results of the thermal degradation of collagen-water. The data obtained above 200 degrees C indicate that the atherosclerosis induces the higher physico-chemical changes in the collagen when compared to elastin.

show abstract

Predictability of Dielectric Properties for Ischemic Injury of the Skeletal Muscle before Reperfusion

Cited by 5 publications

References 14 publications

Electrical conductivity of tissue at frequencies below 1 MHz

Electrical conductivity of tissue at frequencies below 1 MHz

Multifrequency method for dielectric monitoring of cold-preserved organs

Dielectric relaxation of a protein–water system in atherosclerotic artery wall

Contact Info

Product

Resources

About