Do your legs hurt when walking? Let's learn about the PVR test (Pulse Volume Recording)

Imagine that you are going to the store or just walking for a short distance. After walking a short distance, you suddenly feel a sharp pain in your leg, as if your legs are going numb. After standing for a while, the pain subsides. When you start walking again, the same pain comes back after walking a short distance. Have you had this experience? Or does someone you know have this kind of discomfort? The cause of this could be some kind of blockage in the veins that carry blood to the legs. So, in such a situation, today we are going to talk about a very simple, painless test that can help your doctor find the exact cause. That is the PVR test.

Simply put, what is Pulse Volume Recording (PVR)?

Pulse Volume Recording, or PVR test for short, is a test that measures how blood is moving through the blood vessels (arteries) in your legs, whether that blood flow is good, or if there is a blockage somewhere.

The best thing about this is that it is a noninvasive test that does not involve any pain, cuts, or needles . To be precise, it is done using high-frequency sound waves, or `(Ultrasound)` technology. So there is nothing to worry about. Sometimes this test is also called `(pulse volume plethysmography)`.

Why would a doctor tell you to do a PVR test?

Often, a doctor will recommend this test to determine if you have a condition called Peripheral Artery Disease (PAD) , or to assess the stage of the condition.

So what is this PAD?

Simply put, PAD is the gradual narrowing of the blood vessels (arteries) that carry clean blood from our heart to our legs. The main cause of this is atherosclerosis . This means that over time, cholesterol and other fatty substances (plaque) build up on the walls of the blood vessels, blocking the blood flow. When the blood flow becomes blocked like this, when your legs need more blood, like when you walk, they can't meet that need. That's when the pain, as mentioned earlier, comes.

PVR Test can:

• Find roughly where the blockage is in the blood vessels in your legs.
• Identify areas where there are blood clots or other blockages.
• Find the exact cause of leg pain when walking.

In some rare cases, this test can also be used to detect problems with the arteries in the hands or fingers and conditions such as Thoracic Outlet Syndrome (TOS).

Is PVR the only way to detect PAD?

No. PVR is just one of the noninvasive vascular tests. Your doctor may recommend other tests along with PVR. Let's take a look at those.

Do you need to prepare before the PVR test?

There's nothing special to prepare for. It's very simple. However, your doctor may say:

• You should avoid smoking for a few hours before the test, as smoking can temporarily narrow your blood vessels.
• You may be asked to stop taking certain medications (such as blood pressure medication) for a while before the test. However, this should only be done under the advice of your doctor.

What happens during the test?

This is a painless procedure that takes between 30 and 60 minutes. Don't worry, I'll walk you through what happens step by step.

1. Preparation: First, you will be put on a hospital gown. You will need to remove any jewelry or other items from your body.

2. Awareness: Next, if you have previously had any blood vessel surgery, such as bypass procedures, stent placement, or angioplasty, you should tell the technologist conducting the test.

3. Lying on the examination bed: You will be made to sit or lie on an examination bed.

4. Putting on BP cuffs: Next, blood pressure cuffs are placed on your arms, upper and lower thighs, groin, ankles, and sometimes your big toe. They are like the cuffs we wear when we take our blood pressure.

5. Applying a gel: Next, a special gel is applied to the leg that helps the ultrasound waves pass through the skin better.

6. Measuring the pressure: Now inflate the BP cuff and measure your blood pressure. At this point, you will feel the cuff getting a little tight, but you will not feel any pain.

7. Ultrasound examination: While the BP cuff is tightened, the technician uses a small hand-held device (transducer) to place it at various points on the leg to check blood flow.

8. Monitoring the results: The data from these sound waves are displayed on a computer screen as "waveforms." The doctor uses the shape of these waves to determine how your blood is moving.

Sometimes, you may be asked to walk around a bit or stand on your toes. See how your blood circulation changes with that exercise.

What happens after the test? When will I receive the report?

As soon as the PVR test is over, you can go home and do all your usual activities.

The technician who performed the test will work with a doctor to analyze your results. This can take anywhere from a few hours to a few days. So, ask your doctor when you can expect to receive the report.

What does the PVR report say?

Your doctor will mainly compare the blood pressure in your arms and legs .

• Normal: The blood pressure in a healthy person's legs should be the same as or slightly higher than the blood pressure in their arms.
• Abnormal condition: If for some reason the blood pressure in your legs is significantly lower than in your arms, it means that there is a blockage or narrowing somewhere in a vein that carries blood to your legs.

Also, by comparing pressure readings taken from different locations in the leg, the doctor can get a rough idea of ​​whether the blockage is in the thigh, below the knee, or around the ankle. However, the PVR test cannot tell exactly which blood vessel is blocked . This may require another test, such as a Duplex Ultrasound.

Questions to ask the doctor

If the doctor says there is a problem with your PVR report, don't be afraid, just ask these questions clearly.

• Am I at risk of developing blood clots because of this PAD condition?
• How accurate are the results of this PVR test?
• What treatment options do I have? Will I need lifestyle changes, medication, or surgery?
• Will I need to have other tests like `(imaging exams)`?

With the answers to these questions, you can gain a better understanding of your condition and, together with your doctor, choose the best treatment plan.

Pulse Volume Recording, PVR, Leg pain, Blood vessel blockage, Peripheral Artery Disease, PAD, Medical tests, Atherosclerosis, Atherosclerosis, Ultrasound