Non-invasive monitoring of the dynamic compliance in the carotidartery
Hutten, H.; Monif, M.
Engineering in Medicine and Biology Society, 2000. Proceedings of the 22nd Annual International Conference of the IEEE
Volume 1, Issue , 2000 Page(s):642 - 644 vol.1
Digital Object Identifier 10.1109/IEMBS.2000.900826
Summary:A device has been developed to monitor non-invasively,
continuously and simultaneously both the intravascular pressure and the
vessel diameter of the carotid artery. The intravascular pressure is
obtained by using the applanation method. The pressure sensor utilizes
the principle that the extravascular pressure necessary to flatten the
vessel wall is equal to the intravascular pressure. The vessel diameter
is determined by employing the four-electrode bioimpedance method. This
approach is based on the principle that the conductivity of blood is
much higher than for the surrounding tissue including the vessel wall.
The device has been successfully applied in 12 healthy persons of
different age and gender, and in a patient with strong atherosclerosis
during ballon dilatation of the carotid artery. The results can be
utilized for estimating the visco-elastic behaviour of the vessel wall.
Pathological changes of the vessel wall structure can be detected
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