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In the measurement of forearm blood flow by venous occlusion plethysmography

safaTerkawi
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2022-08-08
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 In the measurement of forearm blood flow by venous occlusion plethysmography.

  1. A continuous record is made of forearm volume.
  2. A collecting cuff is applied to the wrist.
  3. It is assumed that venous outflow is arrested by the collecting cuff during measurement.
  4. The collecting cuff pressure should be greater than diastolic but less than systolic arterial pressure.
  5. The forearm must be kept below heart level during the measurements.
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safaTerkawi
2022-08-08
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 A. True  Plethysmography means volume measurement.

B. False  It is applied to the upper arm.

C. True  When this is the case, the volume increase equals arterial inflow.

D. False  It must be below diastolic so as not to interfere with arterial inflow.

E. False  Below heart level, the veins fill with blood and are unable to accommodate more during venous occlusion; the forearm must be above heart level.

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