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7-3-3. PPG - Venous Reflux Study
Purpose:
The venous reflux study is performed to assess valvular competence by
measuring the amount of time required for venous refilling after calf veins
have been emptied through exercise.
Preparation:
(1) Connect the PPG probe to the unit and turn it on.
(2) Press Shuttle Button to display MENU.
Select MODE and press Shuttle to set for
DC mode.
(3) COUNT represents number of foot exercise during study and if
desired, press Shuttle on COUNT and turn it up and down to change
the number.
Press BACK to get out of the COUNT sub menu.
(4) Check that the face of the PPG sensor is free of stains. Clean it if
necessary.
(5) Make certain that room temperature is comfortable and that the skin
surface of the lower limb is warm. Cold constricts superficial blood
vessels and thus jeopardizes the accuracy of PPG measurements.
Examination Procedure:
(1) Have the patient sit on an examination table so that the feet are off
the floor.
(2) Apply the sensor, with the clear side against the skin surface, to the
medial malleolus over the posterior tibial vein. Fix the sensor in place
with double-sided clear tape.
(3) Press probe button to begin the measurement process.
