Q.

Which of the following uses ultrasound to check the blood flow?

A. Doppler Shift Method
B. Catheter Tip Method
C. Differential Auscultatory Technique
D. Oscillometric Method
Answer» A. Doppler Shift Method
Explanation: The Doppler method is used to check the flowing blood. The ultrasound waves are projected to the blood flowing in the vessels causing Doppler effect. The returning sound waves are received and projected as images onto the screen.
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