Clinical Non-invasive Ar ter ial Impedance Mesurement Technique
|Authors:||邵耀華||Keywords:||非侵入式;超音波;動脈阻抗;In this study;a non-invasive arterial impedance measurement technique is developed. Since the vascular impedance describes the spectral relationship of blood pressure and flow;it is an important index for vascular load downstream. By combining the ultrasound Doppler and tonometry pressure transducer;the vascular impedance can be calculated. Since the central artery is nearly elastic;the blood pressure is directly related to the change of diameter. For the peripheral arteries;the palpating pressure is recorded to account for the vascular visco-elasticity. Vascular impedance was demonstrated at the abdominal aorta;common carotid artery and peripheries. We found the abnormal side of stroke patients with one-side occlusion had a higher mean resistance than the normal side. In patients with one-side hemorrhagic infarction;both of their CCA impedance increased due to higher afterload. The hypertensive patients showed consistent higher arterial impedance than normal from the central to peripheries.;Non-invasive;Ultrasound;Vascular impedance||Issue Date:||31-Jul-1999||Publisher:||臺北市：國立臺灣大學應用力學研究所||URI:||http://ntur.lib.ntu.edu.tw//handle/246246/29686||Other Identifiers:||882314B002200M08||Rights:||國立臺灣大學應用力學研究所|
|Appears in Collections:||應用力學研究所|
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