What a 94–98% Closure Rate Really Means in Vein Treatment

“98% success rates.” That number appears on almost every vein clinic’s website — including ours. But what does it actually measure? As a physician who performs these procedures, I think you deserve to understand exactly what stands behind the number, what it promises — and what it does not.

What exactly is measured

In clinical studies, “success” of endovenous treatment is almost always defined anatomically: the treated vein remains closed (occluded) on duplex ultrasound at a defined time point — usually one, three or five years. It is an objective, reproducible measurement: the vein is either closed or it is not.

The real numbers, by method

A comprehensive meta-analysis of varicose-vein treatments found high success rates for all endovenous methods, with laser (EVLA) leading in the pooled data (van den Bos et al., J Vasc Surg, 2009). In a randomized 5-year follow-up, laser and classical surgery maintained similar results (Rasmussen et al., J Vasc Surg, 2013), and with medical adhesive (VenaSeal), the Kaplan-Meier estimate showed 91.4% of veins remaining closed at five years (85.2% for radiofrequency) (Morrison et al., J Vasc Surg Venous Lymphat Disord, 2020). Worth adding: later head-to-head randomized trials found laser and radiofrequency practically equivalent. Bottom line: in skilled hands, all modern methods close the treated vein with similarly high reliability — choosing between them is a matter of anatomy and personal fit, as we detailed in our method comparison.

Three things the number does not say

1. A closed vein ≠ zero symptoms. In most patients, heaviness, swelling and pain improve dramatically — but any symptom component coming from another source (joints, nerves, lymphatics) will not vanish with the vein. That is precisely why thorough diagnosis before treatment matters.

2. A closed vein ≠ lifetime immunity. Venous disease is a chronic connective-tissue condition. The treated vein stays closed in the vast majority of cases — but other veins that were healthy on treatment day can develop reflux later. In long-term follow-up, a share of patients treated by every method — surgery included — develop some new visible veins over the years. We wrote in depth about the difference between “recurrence” and disease progression.

3. The number depends on who performs it. Published success rates were achieved by experienced operators with strict duplex protocols. The same technology in different hands gives different results — which is why it is worth asking any clinic how it tracks its own outcomes.

Questions worth asking any clinic

• How do you define success — and when is it measured? (The right answer: duplex-verified closure at scheduled follow-up.)
• Who performs the procedure, and how many such procedures per year?
• What happens if the vein partially reopens — and what does supplementary treatment cost?

A patient who understands what the number measures also knows what expectations to build: a very high chance the treated vein closes and stays closed, real symptom improvement — and periodic follow-up, because veins are a living system.

Frequently Asked Questions

If success is 95% — what happens to the other 5%?

Usually partial reopening of a vein segment (recanalization), picked up at duplex follow-up. Some cases cause no symptoms and are simply monitored; when needed, a short supplementary treatment — usually injection — closes the reopened segment.

Does the body miss a closed vein?

No. The treated vein was a diseased superficial vein carrying blood the wrong way. After closure, blood reroutes to the healthy deep veins — which carry the great majority of leg blood anyway. The body gradually absorbs the closed vein.

Can varicose veins come back after successful treatment?

The treated vein stays closed in the vast majority of cases. What can happen over years is new reflux developing in other veins — chronic disease progression, not treatment failure. Periodic duplex checks catch it early, when treatment is simple.

Which method has the best long-term data?

Differences between laser, radiofrequency and adhesive are small, and all have solid 5-year data — about 91% for adhesive in VeClose, and laser matching surgery in a 5-year randomized trial. The choice follows your anatomy and preferences, not a single advertised percentage.

Is classical surgery more reliable than the newer methods?

No. In a randomized trial with 5-year follow-up, laser and surgery showed similar efficacy — but endovenous methods mean a faster return to normal activity (one to two days versus about four for surgery) and no general anesthesia. International guidelines recommend thermal ablation (laser or radiofrequency) first-line, with adhesive closure an endorsed non-thermal alternative.

References

1. van den Bos R, et al. Endovenous therapies of lower extremity varicosities: a meta-analysis. J Vasc Surg, 2009. PubMed
2. Rasmussen L, et al. Randomized clinical trial comparing endovenous laser ablation and stripping of the great saphenous vein with clinical and duplex outcome after 5 years. J Vasc Surg, 2013. PubMed
3. Rasmussen LH, et al. Randomized clinical trial comparing endovenous laser ablation, radiofrequency ablation, foam sclerotherapy and surgical stripping for great saphenous varicose veins. Br J Surg, 2011. PubMed
4. Morrison N, et al. Five-year extension study of patients from a randomized clinical trial (VeClose) comparing cyanoacrylate closure versus radiofrequency ablation. J Vasc Surg Venous Lymphat Disord, 2020. PubMed