| 摘要 |
PURPOSE:To mount a probe for flow rate measurement on a tube body where fluid to be measured flows without mistaking its position by forming a recessed part where the probe is fitted in the outer peripheral surface of the tube body. CONSTITUTION:An ultrasonic flowmeter 10 measures the flow rate of extracted blood so as to control the driving state of a pump 20 for an auxiliary heat. The probe 14 for fluid measurement is fitted to the tube where blood to be measured flows, i.e., a part where blood extraction canula 12 is mounted. Here, the recessed part 12a is formed at the part of the tube 12 at the mounted part, so a mounting person only presses the part between the tip parts of a couple of gripping pieces 24d of the probe main body 14 against the tube 1 where the recessed part 12a is formed to securely mount the probe without mistaking its position.
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