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  4. Clinical Non-invasive Ar ter ial Impedance Mesurement Technique
 
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Clinical Non-invasive Ar ter ial Impedance Mesurement Technique

Date Issued
1999-07-31
Date
1999-07-31
Author(s)
邵耀華  
DOI
882314B002200M08
URI
http://ntur.lib.ntu.edu.tw//handle/246246/29686
Subjects
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
Publisher
臺北市:國立臺灣大學應用力學研究所
Type
report
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882314B002200M08.pdf

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