How Long Do Iliac Vein Stents Last?

The Quick Answer

Iliac vein stents are designed to be permanent. Once placed, the stent stays in the vein for life and is not routinely replaced. The real question is how long the stent stays fully open, and for most patients the answer is many years.

Research shows that more than 9 in 10 stents placed for vein compression, such as May-Thurner syndrome, are still open after one year, and most remain open at three years and beyond. Results depend on why you needed the stent, your clotting history, and how closely you follow up with your vascular specialist. Even when a stent narrows, it can often be reopened with a minimally invasive procedure.

Below, we explain what affects how long an iliac vein stent lasts, what follow-up care looks like, and the warning signs to watch for.

What Is an Iliac Vein Stent?

An iliac vein stent is a small, flexible metal mesh tube placed inside a narrowed or blocked iliac vein, the large vein that drains blood from your leg through your pelvis. The stent holds the vein open so blood can flow back toward the heart normally.

Patients usually need iliac vein stenting for one of three reasons:

• Vein compression without a clot. In May-Thurner syndrome, the right iliac artery presses the left iliac vein against the spine. Over time, this narrows the vein and can cause leg swelling, pain, and heaviness.
• A recent clot. An iliac vein compression can trigger deep vein thrombosis (DVT). After the clot is treated, a stent may be placed to fix the narrowing that caused it.
• Scarring from an old clot. A past DVT can leave the vein scarred and narrowed, leading to post-thrombotic syndrome and chronic venous insufficiency.

The procedure is minimally invasive. Your surgeon reaches the vein through a small needle puncture, often behind the knee or in the groin, and uses intravascular ultrasound (IVUS) and a venogram to size and place the stent precisely. Many patients go home the same day.

How Long Do Iliac Vein Stents Stay Open?

Doctors measure a stent's success by its "patency," which simply means whether the stent is still open and letting blood flow through. You may hear two terms:

• Primary patency means the stent stayed open on its own, with no extra procedures.
• Secondary patency means the stent is open, including cases where it narrowed or clotted and was successfully reopened.

The most important factor in how long a stent stays open is the reason it was placed. A large review of 37 studies and nearly 2,900 patients found these one-year results:

• Compression without a clot (such as May-Thurner syndrome): 96% of stents stayed open on their own, and 99% were open after any needed touch-ups.
• Stents placed after a recent clot: 87% stayed open on their own, and 89% overall.
• Stents placed for scarring from an old clot: 79% stayed open on their own, but 94% were open after reopening procedures.

Longer-term results are also encouraging. A review of nearly 2,000 patients found that about 77% of stents were open on their own at three years, rising to about 94% when stents that needed a touch-up were included. A 2024 study following patients for three years found that 87.5% of stents placed for compression alone remained open, compared with 66.7% in patients whose compression had already caused a clot.

The takeaway for patients: stents placed for May-Thurner syndrome before a clot forms tend to last the longest, and most stents that do narrow can be reopened when problems are caught early.

What Affects How Long an Iliac Vein Stent Lasts?

Several factors shape your long-term results. Some are outside your control, but many are not.

Factors related to your condition:

• Why you needed the stent. As the research above shows, stents for compression alone tend to stay open longest. Stents placed after a clot or for old scarring face more challenges.
• How much of the vein is affected. Longer narrowed segments, or blockages that extend into the thigh vein, often require longer stents and carry a higher chance of narrowing.
• Blood flow into the stent. A stent works best when healthy blood flows into it from the leg. Scarring in the veins below the stent can slow that flow.
• Clotting tendencies. Inherited clotting disorders or a history of repeat clots can raise the risk of a stent clotting.

Factors related to the procedure:

• Accurate sizing and placement. IVUS imaging lets your surgeon measure the vein from the inside and choose the right stent size and position. This precision plays a big role in long-term success.
• Specialist experience. Venous stenting is a specialized procedure, and outcomes are best with a surgeon who performs it regularly.

Factors you can influence:

• Taking medications as prescribed. Stopping a blood thinner or antiplatelet medication early is one of the most common causes of early stent problems.
• Staying active. Regular walking helps the calf muscles push blood through the stent.
• Wearing compression stockings if your surgeon recommends them.
• Not smoking and maintaining a healthy weight, both of which lower clotting risk.
• Keeping every follow-up appointment. Catching narrowing early is the best way to keep a stent working for years.

What Does Follow-Up Care Look Like After Iliac Vein Stenting?

Follow-up visits are how your care team makes sure your stent keeps working. Most stent problems develop slowly and without symptoms at first, so routine checks can catch narrowing before it turns into a blockage.

Your schedule will be tailored to you, but a common follow-up plan looks like this:

1. The first few weeks: An ultrasound confirms the stent is open and blood is flowing well. Your care team also reviews your medications and how you're feeling.
2. Around 3 and 6 months: Repeat ultrasounds check for early narrowing while the vein heals around the stent.
3. At 1 year: A check-up confirms your stent is stable and reviews whether your medications should change.
4. Every year after that: Ongoing yearly ultrasounds help keep your stent working for the long term.

If an ultrasound shows narrowing, your surgeon may recommend a follow-up venogram and IVUS for a closer look. Narrowing inside a stent can often be treated with iliac vein balloon angioplasty, an outpatient procedure that reopens the vein without replacing the stent.

Between visits, pay attention to your legs. Many patients notice that swelling and heaviness improve after stenting, so symptoms that start to come back are worth reporting.

When Should I Call My Doctor About My Stent?

Contact your vascular specialist promptly if you notice:

• New or returning swelling in the leg on the side of your stent
• Leg pain, heaviness, or cramping that is getting worse
• Warmth, redness, or skin discoloration in the leg
• Back, hip, or groin pain that is severe or increasing
• Bleeding, swelling, or signs of infection at the puncture site

These can be signs that your stent is narrowing or that a clot is forming. You can learn more about clot warning signs in our article on the difference between a blood clot and DVT.

Call 911 or go to the nearest emergency room if you have sudden shortness of breath, chest pain, a racing heartbeat, or are coughing up blood. These can be signs of a pulmonary embolism, which needs emergency care.

People Also Ask

Is an iliac vein stent permanent?

Yes. Iliac vein stents are designed to stay in place for life. Over the first few months, the lining of the vein grows over the stent, and it becomes part of the vein wall. Stents are not routinely removed or replaced.

Will I need blood thinners after an iliac vein stent?

Most patients take a blood thinner or antiplatelet medication for a period after stenting. How long depends on your history. Patients stented for compression alone often need a shorter course, while patients with past or recurring clots may need longer treatment. Your vascular specialist will tailor this to you.

Can an iliac vein stent get blocked?

Yes, a stent can narrow from scar tissue or become blocked by a clot. When this is caught early, it can usually be reopened with a minimally invasive procedure such as balloon angioplasty, which is why regular follow-up matters.

Is back pain normal after iliac vein stenting?

Mild back or hip discomfort is common after stenting as the vein adjusts to the stent. It usually improves over the following weeks to months. Let your care team know if pain is severe or getting worse.

Can I have an MRI with an iliac vein stent?

Most modern venous stents are considered MRI-conditional, meaning MRI scans can be done safely under certain settings. Always tell the imaging team you have a stent and bring your implant card.

Can I exercise after getting an iliac vein stent?

Yes. Walking is encouraged soon after the procedure because it keeps blood moving through the stent. Most patients return to normal activity within days to weeks. Follow your surgeon's specific instructions on when to resume heavier exercise.

Long-Term Vein Care From a Vascular Surgeon in Northwest Indiana

Whether you're considering a stent for May-Thurner syndrome or need follow-up care for a stent you already have, the right specialist makes a difference. At Illiana Vascular Center in Munster, Indiana, Dr. Dominic J. Tolitano, a board-certified cardiothoracic and vascular surgeon, uses IVUS-guided precision to place stents and monitors them closely for the long term.

We care for patients throughout Northwest Indiana and the greater Chicagoland area.

Schedule a consultation or call our office at 224-501-2353.

This article is for educational purposes only and is not a substitute for professional medical advice. Your follow-up schedule and medications should be guided by your own vascular specialist. If you think you may have a pulmonary embolism, call 911 immediately.