Heart & Vascular Health
leg bones, arteries and veins

Treatment Options for Blocked Veins

Deep Vein Thrombosis (DVT) can cause leg pressure, swelling

Deep vein thrombosis (DVT) is a condition in which a blood clot forms in one of the deep-seated veins in your body.

Certain genetic conditions increase your risk for DVT, as do medical conditions (such as obesity or pregnancy) and certain medications. Lifestyle factors such as sitting for extended periods of time or smoking also increase your risk of DVT.

Whatever the cause, we can help mitigate symptoms and lessen the likelihood of serious problems caused by DVT.


One acute and serious problem that can occur with deep vein thrombosis is when the clot or part of the clot breaks away and travels to the lungs, causing pulmonary embolism (blockage from a clot in the lung). This is a serious development that requires immediate medical attention.

Chronic or long-term DVT can also cause problems locally. Though not life threatening, these complications can be painful and debilitating.

Early symptoms of DVT include swelling, pain, warmth and redness in the involved leg. The location of the blood clot in the body determines how we treat the problem.

Blockage below the knee

When the clot or blockage is limited to the blood vessels below the knee (the tibial veins), your body repairs itself in 90 percent of all cases. The blood vessel finds a way around the blockage and restores proper blood flow.

This restoration process takes between three and six months. During that time, we usually provide anti-coagulant or anti-clotting medication and follow the patient closely with ultrasound checkups.

Blockage above the knee

When the clot extends above the knee joint and impacts the larger femoral or iliac veins, the risk for hypertension (increased blood pressure) in the veins that supply the affected limb increases. Between 40 to 60 percent of patients who have DVT of the ilial femoral segment of the vein in the thigh or pelvis will experience venous hypertension.

Chronic venous hypertension causes pain and swelling of the limb, further restricts blood flow and can ultimately lead to ulceration and open sores.

Treatment options

If the clot or obstruction is limited to the femoral vein in the thigh, we rely on compression of the calf and foot (using compression stockings and socks) and the body’s natural development of workaround venous pathways. Sometimes we will use lysis if these clots in the femoral vein are found early (within the first three weeks) to reduce long-term risks of venous hypertension. Currently, there is little available to improve the chronic obstruction process.

If the obstruction extends into the pelvis, venous thrombolysis (clot buster medication) and possibly venous stenting (the use of metallic mesh tubes to hold the vein open) of the responsible iliac vein have been very successful. If the clot is more than one month old, then the clot buster is not as effective, but outcomes can be improved with stenting.

If appropriate, we can insert a stent higher up, all the way to the inferior vena cava, which drains blood from the lower body.

Several companies are developing stents specifically for use in the venous system, but these are not commercially available in the United States. However, even with existing technology (stents used primarily for arteries), we have had excellent success in improving chronic blockage of the pelvic venous system.

Successful procedures

We have evaluated and treated a large number of patients with chronic DVT.  And, we have had very good long-term success in treating patients with stents.

We have also helped patients who have had problems with previously placed stents. For these patients, we can stent either around or through the earlier placed stents to decrease the pressure of veins in the legs and to improve their symptoms.

Tags: deep vein thrombosis, DVT

Daniel Clair, MD, is Chairman of the Department of Vascular Surgery at Cleveland Clinic. In 2007, Dr. Clair was named one of America’s Top Doctors.

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  • Dodiejo

    I have been diagnosed with PAD in the thigh and calf area of both legs. I was taking Cilostazol tab100 mg. I asked my Doctor if there is any other thing I could do to help W/ my problem he said NO JUST KEEP MOVING. Is that all I can do? Is there any vitamins or minerals or diet, anything that I can do to for improvement? I was a little disappointed in his answer.

    • The_Beating_Edge_Team

      The first step to giving you a true answer would be to look at the results of your diagnostic tests. Exercise (walking) is important for patients with PAD as well as a low fat (heart healthy) diet. However, if your PAD is advanced, there may be other treatments for you – it would depend on your medical records and test results. http://my.clevelandclinic.org/heart/disorders/vascular/pad.aspx . We are happy to provide you with a second opinion in person or via MyConsult. betsyRN

  • Alan Cary

    Varicose veins cause restless leg syndrome which causes pain.

    • Manoher

      I have skin after some time i m used Avil inj + Dazipal inj myself atleast 5+5 one time one dosage per day 60 ampule every days. mow I am droped dazipam and avil 2+2+2 but all of major vens blocked.

  • sunita

    hi, my father suffering this problem veins blockage, more pain and swelling in his toes, operation is last decision,…. plz suggest

    • The_Beating_Edge_Team

      Sunita – thanks for reaching out – we would need to see your father’s medical records and test results to provide actual suggestions for care – we would be happy to see him – or you can do an online second opinion consult through http://my.clevelandclinic.org/online-services/myconsult

  • trish abrahams

    My grandmother was diagonised wth veins
    brockage which is affecting the thoracic cavity and the doctors said that there is anthing medicarly can done . I wanted to find disease. Can be treated or ràther maintained

  • MiAn

    I have swollen blood clot right above my right knee.This is someetimes awfully painful.I have taken various madications and have been visiting numorous drs but no satisfying results even at times it is difficult for me to fully bend my leg.plz give me suggestions that if it is necessary for me to get a sergary