High temporal resolution measurement of pulsatile red cell velocity in microvessels by a fiber-optic laser-Doppler anemometer microscope
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- Seki Junji
- National Cardiovascular Center Research Institute
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- Sugihara-Seki Masako
- National Cardiovascular Center Research Institute
Bibliographic Information
- Other Title
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- 光ファイバ型レーザドップラ流速計顕微鏡による高時間分解微小循環計測
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Abstract
A fiber-optic laser-Doppler anemometer microscope (FLDAM) was developed for the measurement of microvascular red cell velocity and its applicability was examined in in vivo experiments with emphasis on the temporal resolution of the system. Red cell velocity measured with the time resolution up to about 10 ms clearly showed pulsation synchronous with the systemic arterial pressure in mesenteric microvessels of spontaneously hypertensive rats (SHR) with diameters from 5.8 to 88.9 μm. The amplitude of pulsation decreased with decreasing arteriolar diameter, and the time lag of red cell velocity relative to the systemic arterial pressure monotonically increased from large arterioles through small arterioles, capillaries, small venules to large venules. The propagation velocity of the pulse wave was also obtained in arterioles. Thus, the FLDAM was proved to have the temporal resolution sufficient for the analysis of the pulse wave propagation in microvasculature of small animals with high heart rates.
Journal
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- Journal of Japanese Society of Biorheology
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Journal of Japanese Society of Biorheology 5 (2), 20-27, 1991
JAPANESE SOCIETY OF BIORHEOLOGY
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Details 詳細情報について
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- CRID
- 1390282680397432320
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- NII Article ID
- 130001933382
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- ISSN
- 09134778
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- Text Lang
- ja
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- Data Source
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- JaLC
- CiNii Articles
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- Abstract License Flag
- Disallowed