Zobrazeno 1 - 10
of 29
pro vyhledávání: '"H. G. Goovaerts"'
Autor:
H. G. Goovaerts, Robert M. Heethaar, M. ten Bolscher, Th. J. C. Faes, J. C. Netelenbosch, G. W. de Valk-de Roo, W.J.F. van der Vijgh
Publikováno v:
Annals of the New York Academy of Sciences. 873:99-104
An approach to determine intra- and extracellular conduction on the basis of Bode analysis is presented. Estimation of the ratio between intra- and extracellular conduction could be performed by phase measurement only, midrange in the bandwidth of in
Publikováno v:
Annals of the New York Academy of Sciences. 873:388-395
Design concepts for the implementation of two basic functions for measurement of electrical impedance are presented: current injection and voltage measurement. At relatively high frequencies, the application of an alternating current through the body
Autor:
J. M. Meijer, R. M. Heethaar, Jan Bakker, H. G. Goovaerts, E. Raaijmakers, Th. J. C. Faes, Peter W.A. Kunst
Publikováno v:
Medical & biological engineering & computing, 36(4), 461-466. Springer Verlag
The study investigates the effects of non-cardiogenic oedema, especially the accumulation of protein in extracellular fluid, on thoracic impedance and proposes a new method of oedema measurement based on an impedance ratio from a dual-frequency measu
Autor:
Jan Bakker, R. M. Heethaar, Johannes H. Rommes, Peter W.A. Kunst, E. Raaijmakers, H. G. Goovaerts, Th. J. C. Faes
Publikováno v:
Physiological measurement, 19(4), 491-499. IOP Publishing Ltd.
The purpose of this study was to investigate the influence of pulmonary oedema as measured with the double indicator dilution technique on the accuracy of cardiac output (CO) measurement using thoracic impedance cardiography (TIC) compared with therm
Autor:
E. Raaijmakers, Th. J. C. Faes, H. G. Goovaerts, J.T. Marcus, Robert M. Heethaar, P M J M de Vries
Publikováno v:
Proceedings of 18th Annual International Conference of the IEEE Engineering in Medicine and Biology Society.
The purpose of the study was to investigate the resistivity change over the cardiac cycle. This is important for the correct application of thoracic impedance cardiography (TIC). The ratio of spatial mean velocity over the vessel radius of the ascend
Autor:
Robert M. Heethaar, R Gorkink, J. H. Meijer, H. G. Goovaerts, Th J C Faes, A E Hoetink, E H Schuur
Publikováno v:
Physiological measurement. 23(2)
This study investigates whether an arrangement with nine spot electrodes, for thoracic bio-impedance cardiography, can be replaced by an arrangement with five spot electrodes. The study was conducted on 15 healthy subjects, six females and nine males
Publikováno v:
Annals of the New York Academy of Sciences. 873
In electrical impedance cardiography, Kubicek's formula is often used to measure stroke volume from thoracic impedance variations synchronously to heart activity. To calculate stroke volume from impedance variations, the so-called outflow problem sho
Publikováno v:
Medicalbiological engineeringcomputing. 36(5)
At relatively high frequencies, the application of an alternating current through the body or a body segment results in electromagnetic stray fields which reduce the amount of current actually injected into the tissue under study. This radiation effe
Publikováno v:
Medicalbiological engineeringcomputing. 36(6)
Design considerations and implementation of a multifrequency measuring channel for application in the field of bio-impedance measurement are discussed in this paper. The input amplifier has a differential configuration which is electrically isolated
Autor:
Robert M. Heethaar, P M J M de Vries, H. G. Goovaerts, Th. J. C. Faes, J. H. Meijer, E. Raaijmakers
Publikováno v:
Medicalbiological engineeringcomputing. 36(5)
In thoracic impedance cardiography (TIC) measurements the neck electrodes are often positioned at the basis of the neck, close to the neck-thorax transition. Theoretically, this neck-thorax transition will cause inhomogeneities in the current density