Plethysmography, Venous

This is a test which is performed to measure changes in the blood volume of an extremity. Usually this is done on a leg to exclude deep-vein clots or blockages in an artery. During this test, three blood pressure cuffs are placed on three different locations of the extremity and then attached to a machine called a pulse volume recorder. This is less accurate than venography (where a dye is injected into a vein prior to taking x-rays); however, no complications are associated with this procedure.

PREPARATION FOR TEST

No preparation or fasting is necessary.

NORMAL FINDINGS

Patent venous system without evidence of clotting or vein closure.

Ranges for normal findings may vary among different laboratories and hospitals. You should always check with your doctor after having lab work or other tests done to discuss the meaning of your test results and whether your values are considered within normal limits.

MEANING OF TEST

Your caregiver will go over the test results with you and discuss the importance and meaning of your results, as well as treatment options and the need for additional tests if necessary.

OBTAINING THE TEST RESULTS

It is your responsibility to obtain your test results. Ask the lab or department performing the test when and how you will get your results.