EASY METHOD FOR MEASUREMENT OF OPENING ANGLE OF BJORK-SHILEY VALVE WITH TWO COMPUTERS : Proof of floating phenomenon of Bjork-Shiley Valve
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概要
- 論文の詳細を見る
A new method for measuring the opening angle of Bjok-Shiley valve (B-S valve) was reported in 1977. However, this method is complicated enough to permit quick calculation of the opening angle in multiple frames of one cine-film. We devised a new method with using two computers (NAC Cardias GP 2000, TEXAS TI-59) for calculating the opening angle of the B-S valve. We measured the opening angle of 7 cases (they were all implanted B-S valves, 5 were mitral and 2 were aortic). Results are the following: (1) The maximum opening angle ranged from 54 degrees to 65 degrees and the mean value was 58.1 degrees. (2) We showed the floating phenomenon of B-S valve with our method. (3) We showed the accuracy of our method by measuring 10 times the same photograph of B-S valve. (4) We showed that our method is very accurate by comparing the values calculated by our method with those calculated directly from the valve which was removed from a patient. (5) It takes less than 30 minutes to calculate the opening angle of 60 frames (we took 60 frames of cine-film per minutes).
- 社団法人日本循環器学会の論文
- 1981-09-20
著者
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Eguchi S
Department Of Thoracic And Cardiovascular Surgery Niigata University School Of Medicine
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Matsuzawa Hideo
The Second Department Of Surgery University Of Niigata Faculty Of Medicine
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Matsuzawa Hideo
The Second Department Of Surgery Niigata University School Of Medicine
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EGUCHI SHOJI
Niigata University School of Medicine
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Eguchi Shoji
The Second Department of Surgery Niigata University School of Medicine
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Eguchi S
Department Of Molecular Design And Engineering Nagoya University
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Eguchi Shoji
The Second Department Of Surgery Of Niigata School Of Medicine
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Eguchi Shoji
Dept Of Thoracic And Cardiovascular Surgery Niigata University Hospital
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Eguchi Shoji
Second Department Of Surgery Niigata University School Of Medicine
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AKANUMA TSUYOSHI
The Second Department of Surgery,Niigata University School of Medicine
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Akanuma Tsuyoshi
Department of Thoracic and Cardiovascular Surgery, Niigata University School of Medicine
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Eguchi Shoji
The Second Department Of Surgery Niigata University
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Akanuma Tsuyoshi
Department Of Thoracic And Cardiovascular Surgery Niigata University School Of Medicine
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