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KMID : 0376219790160010083
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Chonnam Medical Journal
1979 Volume.16 No. 1 p.83 ~ p.86
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Sound Perceptive Drop-Counter
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Abstract
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The instantaneous measurement of blood flow has interested biological workers for many years. Ideally the physiologist would like to determine the amount of blood flowing through a vessel at any instant without disturbing the flow, the vessel, or the hemodynamics of the animal. It has not been possible, to the present time, to accomplish this to complete satisfaction of research workers; especially very minute amounts of flow cannot be satisfactorily detected. The present authors have devised an apparatus, "sound perceptive drop-counter", which has a detecting head made up of a condenser microphone which is attached to the top of an erect cylindrical tube and converts the dropping sounds into electrical signals. The apparatus can measure a range of 0ml/min to 30 ml/min of blood flow in the vessels above the blood pressure of 10-26.5mm H20.
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