﻿WEBVTT

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Place a blood pressure cuff around the volunteer's upper arm.

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Inflate the cuff to 90 mmHg.

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Compress a prominent vein in the volunteer's forearm.

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Run your finger along the vein towards the volunteer's hand.

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Release your index finger.

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Relieve the pressure in the cuff (keep the cuff attached to the volunteer).

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Have the volunteer hold their arm by their side.

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Observe the veins on the back of the hand.

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Raise the arm vertically above the head.

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Again, observe the veins on the back of the hand.

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Inflate the cuff so that it obliterates the radial pulse (around 150 mmHg).

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Lower the arm to its starting position.

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Observe the veins on back of the hand.

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Release the pressure in the cuff and remove it from the volunteer.