A Change of Maximum Blood Flow Velocity in the Human Arteries during Involuntary Postural Changes
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概要
- 論文の詳細を見る
We have developed a blood flow velocimeter to measure maximum blood flow velocity (MBFV) in carotid, brachial and femoral arteries simultaneously by using a Doppler ultrasound technique. This measurement system is based on a continuous wave Doppler ultrasound method with two semicircular piezoelectric (PZT) transducers, one continuously transmitting ultrasound, and the other continuously receiving the echoes. This report is to investigate the changes of MBFV in 3 arteries of 5 healthy normal male volunteers during passive postural changes in supine to 90degrees head-up-tilt (HUT). As a result of these measurements, we could confirm that MBFV in those arteries especially in brachial and femoral are decreased by supine to HUT posture. But, it's just changed a little in carotid artery. A large decreasing in MBFV is expected to be an effect of venous pressure and a constant of MBFV in carotid artery is caused a cerebral autoregulation (CA).
- 社団法人電子情報通信学会の論文
- 2004-10-27
著者
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Azhim Azran
Dept. Of Electric And Electronic Eng. The University Of Tokushima
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Azhim Azran
徳島大学 工学部電気電子システム講座
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Azhim Azran
徳島大学 工学部電気電子工学科
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Yamaguchi Hisao
Electronic And Mechanical Sec. Tokushima Pref. I. T. C.
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YAMAGUCHI HISAO
Dept. of Environmental Physiology, Tokushima Bunri University
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YOSHIZAKI KAZUO
Dept. of Physiology, The University of Tokushima
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Hirao Yuji
Dept. of Electric and Electronic Eng., The University of Tokushima
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Kinouchi Yohsuke
Dept. of Electric and Electronic Eng., The University of Tokushima
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Kinouchi Y
Dept. Of Electric And Electronic Eng. The University Of Tokushima
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Yamaguchi H
Ritsumeikan Univ.
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Yoshizaki Kazuo
Dept. Of Physiology The University Of Tokushima
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Kinouchi Yohsuke
Dept. Of Electric And Electronic Eng. The University Of Tokushima
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Kinouchi Yohsuke
Dept. Of Electr. And Electro. Eng. University Of Tokushima
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Yoshizaki Kazuo
Institute Of Health Bioscience The University Of Tokushima
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Kinouchi Yohsuke
Univ. Tokushima Graduate School Tokushima Jpn
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