The ClosureFast procedure uses radiofrequency energy or heat to close the diseased vein, which redirects blood flow to healthy veins, relieving symptoms.

Using an ultrasound, your physician will position the catheter into the diseased vein through a small access site.

Catheter placement into diseased vein through small access site during a ClosureFast procedure

A series of injections numbs the area around the vein.

Injection of local anesthetic being applied during a ClosureFast procedure

The vein wall is heated and the catheter is withdrawn from the vein.

Radiofrequency ablation catheter collapsing a vein with heat

The vein is “heat sealed” as the catheter is removed. A multilayer compression wrap is applied from foot to groin.

Radiofrequency ablation catheter being withdrawn from a vein as it collapses after treatment with heat
ClosureFast patient Gabrielle in front of water and mountains

Having this procedure made such a difference in my life and my general wellbeing. Thank you for not only making lifesaving therapies, but also focusing on procedures that better people’s life and help them live the most normal, comfortable life they can.

– Gabrielle M., ClosureFast patient

You will have an ultrasound imaging exam of the leg being treated. This exam is important for assessing the diseased superficial vein and planning the procedure.

Your doctor will discuss the procedure with you. Here is a brief summary of what to expect:

  • The ClosureFast procedure is performed on an outpatient basis. Your doctor will perform the ClosureFast procedure. Using an ultrasound, your doctor will position a catheter in the diseased vein through a small opening in the skin.
  • The small catheter delivers heat to the vein wall, causing it to shrink and seal the vein. Once the diseased vein is closed, blood will reroute itself to other healthy veins.
  • You will be taken to the recovery area to rest.
  • Following the procedure, your doctor will apply a simple bandage over the insertion site and will give you compression stockings to aid in the healing process. Your doctor may encourage you to walk and to refrain from extended standing and strenuous activities for a period of time. The average patient typically resumes normal activities within a few days.1,2
  • Your doctor will recommend follow-up care as needed.
Patient leg before ClosureFast procedure
Patient leg after ClosureFast procedure

Individual results may vary. Images courtesy of Dr. Kathleen Gibson.

  • Relief of symptoms after two days, with a noticeable improvement in one to two weeks3
  • Minimally invasive outpatient procedure
  • Less pain and bruising than laser treatment3
  • Faster recovery than laser treatment3
  • Proven results with positive patient experience1,3,4
  • Rapid recovery — on average, patients resume normal activities within a few days2
  • Lasting results — the only radiofrequency energy procedure with published long-term clinical data demonstrating safety and efficacy, with a 91.9% closure rate at five years.4

Adverse events can include nerve injury, hematoma, phlebitis, thrombosis, and/or pulmonary embolism.

Type of therapy
Thermal shrinkage of the vein wall with radiofrequency energy or heat

Inpatient or outpatient procedure
Outpatient procedure

One- versus two-leg treatment
Typically, each leg will be treated in separate appointments

Needle sticks required
One needle stick for vein access. Typically, 5 to 10 needle sticks for anesthesia.

Typical post-treatment recovery
Healing of vein access site, anesthetic needle stick sites, and also healing of ablated vein section

Compression hose
Required for approximately one week

Procedure success rate
91.9% after five years4

Most patients report feeling little, if any, pain during the ClosureFast procedure.3 Your doctor will give you a local or regional anesthetic to numb the treatment area.

Patients treated with the ClosureFast procedure may resume normal activity more quickly than patients who undergo surgical vein stripping or laser ablation. With the ClosureFast procedure, the average patient typically resumes normal activity within a few days.2 For a few weeks following the treatment, your vein specialist may recommend a regular walking regimen and suggest you refrain from strenuous activities (heavy lifting, for example) or prolonged periods of standing.

Most patients report relief of symptoms after two days, with a noticeable improvement in one to two weeks.

Most patients report limited to no scarring, bruising, or swelling following the ClosureFast procedure.3

Both ClosureFast and lasers use thermal technology to deliver heat into the diseased vein, but they each use a different method of delivery. Despite their similarity in using heat, a 2009 study showed that the ClosureFast procedure is associated with lower rates of pain, bruising, and complications and a faster improvement in patients’ quality of life when compared to 980 nm laser ablation.4

During vein stripping, incisions are made in the groin and calf, and a tool is threaded through the diseased vein to pull the vein out of the leg. With the ClosureFast procedure, only one small incision is made at the insertion site and the vein is then treated and left in place. ClosureFast is a minimally invasive approach that reduces the likelihood of pain and bruising, associated with vein stripping surgery.1

Many patients have access to the ClosureFast procedure through their insurance coverage plan. Insurance companies detail access to the ClosureFast procedure and other radiofrequency ablation procedures in coverage policies for varicose veins or chronic venous insufficiency. As with all healthcare procedures, you may also have some cost associated with receiving treatment, such as a copay or coinsurance. Please reach out to your insurance company to discuss your specific plan coverage and potential costs prior to seeking treatment

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Rasmussen LH, Lawaetz M, Bjoern L, Vennits B, Blemings A, Eklof B. Randomized clinical trial comparing endovenous laser ablation, radiofrequency ablation, foam sclerotherapy and surgical stripping for great saphenous varicose veins. Br J Surg. August 2011;98(8):1079-1087.


Hinchliffe RJ, Ubhi J, Beech A, Ellison J, Braithwaite BD. A prospective randomised controlled trial of VNUS closure versus surgery for the treatment of recurrent long saphenous varicose veins. Eur J Vasc Endovasc Surg. February 2006;31(2):212-218.


Almeida JI, Kaufman J, Gockeritz O, et al. Radiofrequency Endovenous ClosureFAST Versus Laser Ablation for the Treatment of Great Saphenous Reflux: A Multicenter, Single-blinded, Randomized Study (Recovery Study). J Vasc Interv Radiol. June 2009;20(6):752-759.


Proebstle TM, Alm BJ, Gockeritz O, et al. Five-year results from the prospective European multicentre cohort study on radiofrequency segmental thermal ablation for incompetent great saphenous veins. Br J Surg. February 2015;102(3):212-218.

Information on this site should not be used as a substitute for talking with your doctor. Always talk with your doctor about diagnosis and treatment information.