Which of the following instrument is most commonly used for measurement of blood flow?(a) NMR Blood Flowmeter(b) Ultrasonic Blood Flowmeter(c) Electromagnetic Blood Flowmeter(d) Laser Doppler Blood FlowmeterThe question was posed to me in an online quiz.The doubt is from Application of Telemedicine topic in division Telemedicine Technology of Biomedical Instrumentation

Which of the following instrument is most commonly used for measuremen

1.	Which of the following instrument is most commonly used for measurement of blood flow?(a) NMR Blood Flowmeter(b) Ultrasonic Blood Flowmeter(c) Electromagnetic Blood Flowmeter(d) Laser Doppler Blood FlowmeterThe question was posed to me in an online quiz.The doubt is from Application of Telemedicine topic in division Telemedicine Technology of Biomedical Instrumentation
Answer» Correct option is (c) Electromagnetic Blood Flowmeter Easy explanation: The most commonly used instrument for the measurement of blood FLOW is of the electromagnetic type. With this type of instrument, blood flow can be measured in intact blood VESSELS without cannulation and under conditions which would otherwise be impossible. However, this method REQUIRES that the blood VESSEL be EXPOSED so that the flow head or the measuring probe can be put across it.

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