On the Flow Dependency of the Electrical Conductivity of Blood

Hoetink, Alex E.; Faes, T.J.C.; Visser, K.R.; Heethaar, R.M.

doi:10.1109/tbme.2004.827263

Cited by 77 publications

(84 citation statements)

References 20 publications

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“…Experiments presented in literature demonstrated that the electrical conductivity of blood depends on its velocity, i.e. the electrical conductivity of moving blood is higher than for the stationary one, Hoetink et al (2004), Balan et al (2004). This increase of the electrical conductivity is caused by reorientation of erythrocytes (red blood cells) influenced by the viscous forces, Fujii et al (1999).…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of blood flow in realistic arteries subjected to strong non-uniform magnetic fields

Kenjereš¹

2008

International Journal of Heat and Fluid Flow

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The paper reports on a comprehensive mathematical model for simulations of blood-flow under the presence of strong non-uniform magnetic fields. The model consists of a set of Navier-Stokes equations accounting for the Lorentz and magnetisation forces, and a simplified set of Maxwell's equations (Biot-Savart/Ampere's law) for treating the imposed magnetic fields. The relevant hydrodynamic and electro-magnetic properties of human blood were taken from the literature.The model is then validated for different test cases ranging from a simple cylindrical geometry to real-life right-coronary arteries in humans. The time-dependency of the wall-shear-stress for different stenosis growth rates and the effects of the imposed strong non-uniform magnetic fields on the blood flow pattern are presented and analysed. It is concluded that an imposed nonuniform magnetic field can create significant changes in the secondary flow patterns, thus making it possible to use this technique for optimisations of targeted drug delivery.

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Section: Introductionmentioning

confidence: 99%

Numerical analysis of blood flow in realistic arteries subjected to strong non-uniform magnetic fields

Kenjereš¹

2008

International Journal of Heat and Fluid Flow

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“…Also, the experiments were conducted in static conditions. In flowing conditions, RBC orientation may also be an additional factor to consider [17,18].…”

Section: Resultsmentioning

confidence: 99%

Analysis of the influence of volume and red blood cell concentration of a thrombus on the permittivity of blood

et al. 2015

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Various extracorporeal circulation devices require a real time thrombus detection system. This paper presents a study toward the establishment of real-time thrombus detection by measuring the electrical properties of blood. We conducted experiments on static bovine blood samples and determined the change in relative permittivity of the samples by changing the size and red blood cell (RBC) concentration of the thrombus in each sample. Results show that the relative permittivity increases linearly with increases in the number of RBCs that form the thrombus. Similarly, permittivity also increases linearly with increases in the volume of the blood that forms the thrombus. These results are consistent with the numerical simulations. However, we found the linear relationship to be dependent on the AC frequency of the applied voltage. We compare and explain this dependency on the basis of earlier studies.

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“…It is designed to be placed on any location where palpation of a pulse is possible. The vIPG system is of four wire, AC current injection type [4]. It expands the AD5933 IC by a single-ended, improved Howland current pump and a transimpedance amplifier.…”

Section: Hardwarementioning

confidence: 99%

Correlation of arterial blood pressure to synchronous piezo, impedance and photoplethysmographic signal features

Alexandru-Gabriel

Osterland

Klum

et al. 2017

Current Directions in Biomedical Engineering

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In this paper we investigate which pulse wave pick-up technologies are well suited for blood pressure trend estimation. We use custom built hardware to acquire electrocardiographic, applanation-tonometric, photo-and impedance-plethysmographic signals during low intensity workouts. Beat-to-beat features and pulse wave runtimes are correlated to the reference arterial blood pressure. Temporal lag adjustment is performed to determine the latency of feature response. Best results are obtained for systolic arterial blood pressure. These suggest that every subject has a range of well-performing features, but it is not consistent among all. Spearman Rho values reach in excess of 0.8, with their significance being validated by p-values lower than 0.01.

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On the Flow Dependency of the Electrical Conductivity of Blood

Cited by 77 publications

References 20 publications

Numerical analysis of blood flow in realistic arteries subjected to strong non-uniform magnetic fields

Numerical analysis of blood flow in realistic arteries subjected to strong non-uniform magnetic fields

Analysis of the influence of volume and red blood cell concentration of a thrombus on the permittivity of blood

Correlation of arterial blood pressure to synchronous piezo, impedance and photoplethysmographic signal features

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