What is the external diameter of flow heads?(a) 0.5 mm(b) 1 mm(c) 1.5 mm(d) 2 mmI got this question in final exam.I'm obligated to ask this question of Application of Telemedicine in section Telemedicine Technology of Biomedical Instrumentation

What is the external diameter of flow heads?(a) 0.5 mm(b) 1 mm(c) 1.5

1.	What is the external diameter of flow heads?(a) 0.5 mm(b) 1 mm(c) 1.5 mm(d) 2 mmI got this question in final exam.I'm obligated to ask this question of Application of Telemedicine in section Telemedicine Technology of Biomedical Instrumentation
Answer» CORRECT choice is (b) 1 mm Best explanation: The flow head contains a slot through which the intact blood vessel can be inserted to make a snug fit. Several probes of different SIZES MUST therefore accompany the flowmeter to match the full range of sizes of the blood vessels which have various diameters. It is naturally more difficult to CONSTRUCT flow heads suitable for use with very small blood vessels. However, flow heads having as small as 1 mm external diameter have been reported in the literature.

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