Recently a remarkable development of membrance and short-term dialysis for dialysis treatment have been evaluated, however, some remain unchanged.
The conventional measurement of the blood flow which has measured the velocity of air bubble in a blood circuit or converted r.p.m. of a blood pump has induced a difference among individuals. ME means such as an electromagnetic blood flowmeter and an ultrasonic blood flowmeter which are expensive and largescaled are unable to use for a individual. Our present invention provides a miniature blood flowmeter, placing a venturi tube in the blood circuit for measuring the blood flow by the pressure-difference between the front and rear venturi tubes. The difference at ouput of two pressure gages using OP amp is determined with the blood flowmeter.
This method for measuring the rate of flow of blood through the fix-sized venturi tube is possible to measure the blood flow per hour as well as the velocity of a flowing fluid.
