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Heavy hardback, no dustjacket, published by Academic Press, Lovely condition. Seller Inventory HVY More information about this seller Contact this seller 5. Condition: Good. Satisfaction Guaranteed! Book is in Used-Good condition. Pages and cover are clean and intact. Used items may not include supplementary materials such as CDs or access codes. May show signs of minor shelf wear and contain limited notes and highlighting. Seller Inventory More information about this seller Contact this seller 6. Condition: Used: Good. More information about this seller Contact this seller 7.
About this Item: Academic Press , More information about this seller Contact this seller 8. Condition: Near Fine. Previous owner signature. Appears unread. More information about this seller Contact this seller 9. Condition: New. Language: English. Brand new Book. Bioimpedance and Bioelectricity Basics, 3rd Edition paves an easier and more efficient way for people seeking basic knowledge about this discipline. This book's focus is on systems with galvanic contact with tissue, with specific detail on the geometry of the measuring system.
Both authors are internationally recognized experts in the field.
The highly effective, easily followed organization of the second edition has been retained, with a new discussion of state-of-the-art advances in data analysis, modelling, endogenic sources, tissue electrical properties, electrodes, instrumentation and measurements.
This book provides the basic knowledge of electrochemistry, electronic engineering, physics, physiology, mathematics, and model thinking that is needed to understand this key area in biomedicine and biophysics. Seller Inventory EOD More information about this seller Contact this seller Published by Academic Press Inc About this Item: Academic Press Inc , Tools Request permission Export citation Add to favorites Track citation.
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Learn more Check out. Abstract Bioimpedance describes the passive electrical properties of biological materials and serves as an indirect transducing mechanism for physiological events, often in cases where no specific transducer for that event exists. Citing Literature. Related Information. Close Figure Viewer. Browse All Figures Return to Figure. Due to the random distribution of current and current attenuation, an error E1 is produced and equation 7 is modified to:. In the abnormal case formation of deposits , a simplified model of blood vessel was described in Figure 3.
In this case, the impedance of blood vessel was called ZS.
V , and the measured impedance by electrodes was estimated in 12 , with addition of error E2. Mural deposits with different sizes and locations are presented in Figure 4 :. In Figure 4a , the long deposit is presented. The electrodes can estimate approximately the impedance of length d of the deposit. Equation 10 becomes:. In Figure 4b , a part of the deposit is located outside the measured length by electrodes. Thus, equation 10 becomes:. In Figure 4c , all deposit sizes are located outside the measured length by electrodes.
In this case, the measured impedance is nearly equal to the vessel impedance in the normal case. Equations 9 to 12 clarify that the presence of deposits increases vessel impedance and, thus, the measured impedance by electrodes. From equations 13 to 16 , it is expected that the sensing electrodes can almost measure the impedance of deposits which are located between them.
In the abnormal case presence of aneurysm , a simplified model of blood vessels is shown in Figure 5. In this case, the aneurysm and its adhesive tissue are assumed to form area A at and their impedance Z at , neglecting the change in vessel area due to aneurysm formation.
An aneurysm is filled with blood and has the same electrical properties of blood and length L.https://carmepujol.eu/templates/butte/veby-subsidios-habitacionales.php
Bioimpedance and Bioelectricity Basics
Z A is the measured impedance by electrodes in the aneurysm case:. Aneurysms of different sizes and locations are presented in Figure 6 :. In Figure 6a , a long aneurysm is presented. The electrodes estimate nearly the impedance of length d of the aneurysm.
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Figure 6b , a part of the aneurysm is located outside the measured segment by electrodes. Figure 6c , all the aneurysms are located outside the measured segment. Thus, the electrodes cannot estimate the aneurysm impedance. The stated equations clarify that the presence of an aneurysm decreases the vessel impedance and, thus, the measured impedance by electrodes. From equations 19 to 22 , it is expected that the electrodes can approximately estimate the impedance of the aneurysm parts which are located between them. In model geometry, the simplified forearm model was constructed.
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The forearm was constructed as structures containing five components i. The taken length was mm, as shown in Figure 7. The thicknesses of skin, fat and muscles were 3 mm, 10 mm and 25 mm, respectively, and the bone diameter was 2 cm. The radiuses of blood and wall were 1. The inter-electrode spacing was mm. The dimensions of the sensing electrodes were. Figure 7 shows the blood vessel in the normal case when the vessel is located under the skin.
Two different vascular disorders were studied using this model, as shown in Figure 8. Figure 8a displays the vessel with mural plaque; this plaque shape was studied at different heights from 0. In Figure Figure 8b , wall swelling was presented with different heights from 0. The dielectric properties of tissues have been defined by Gabriel et al. The blood flow is assumed to be laminar and blood density is and viscosity is 0. Finally, the simulation was executed and the impedance was measured across the voltage electrodes at different vascular cases using different frequencies. In the next section, the simulation results will be represented and discussed.
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