VenousPublished: May 2026Updated: May 20269 min read
Varicose Vein Treatments: VenaSeal vs RFA vs EVLA Singapore
If you have been told you need treatment for varicose veins, you are likely to encounter four options: VenaSeal, radiofrequency ablation (RFA/ClosureFast), endovenous laser ablation (EVLA), and sclerotherapy. As a vascular specialist in Singapore, I see patients who have spent hours researching these procedures online and still leave more confused than when they started. The reason is that the marketing around each technique tends to oversell and undersell in equal measure. What actually matters is the clinical evidence, the anatomy of your specific veins, and the experience of the person performing the procedure. This post lays out what the trials show — and how we think about the decision at Paragon Medical Centre.
PC
Dr. Peter Chang
Triple Board-Certified Cardiologist & Vascular Specialist
Why There Are Four Treatments — and Why That Is Actually Good News
Twenty years ago, the standard treatment for varicose veins was surgical stripping: general anaesthesia, incisions in the groin and calf, several days in hospital, and weeks of recovery. In Singapore and worldwide, minimally invasive alternatives have now almost entirely replaced surgery for the majority of patients.
The four techniques available at most vascular clinics in Singapore — radiofrequency ablation (RFA), endovenous laser ablation (EVLA), VenaSeal cyanoacrylate glue, and sclerotherapy — each close the diseased vein from within, without removing it. The vein is reabsorbed by the body over weeks to months. The reason all four still exist is that no single technique is universally superior; each has strengths that suit particular anatomies, clinical scenarios, and patient preferences.
The four techniques available at most vascular clinics in Singapore — radiofrequency ablation (RFA), endovenous laser ablation (EVLA), VenaSeal cyanoacrylate glue, and sclerotherapy — each close the diseased vein from within, without removing it. The vein is reabsorbed by the body over weeks to months. The reason all four still exist is that no single technique is universally superior; each has strengths that suit particular anatomies, clinical scenarios, and patient preferences.
- All four are performed as day procedures — no overnight hospital stay required
- None requires general anaesthesia; most use local anaesthetic with or without light sedation
- All are Medisave-claimable in Singapore when the procedure meets MOH criteria
- Choice depends on vein diameter, anatomy, skin type, and patient preference — not just cost
RFA (ClosureFast): The Thermal Gold Standard
Radiofrequency ablation uses a catheter inserted into the great saphenous vein (GSV) under duplex ultrasound guidance. The ClosureFast catheter delivers controlled bursts of radiofrequency energy that heat the vein wall to approximately 120°C in 20-second cycles, causing it to contract and seal. The procedure takes 30–45 minutes per leg under local tumescent anaesthesia.
The 5-year data from the VeClose randomised controlled trial showed RFA closure rates of 85.2% at 5 years — robust, durable, and well-validated over two decades of clinical use. NICE Clinical Guideline 168 rates RFA and EVLA as equivalent under the umbrella of “endothermal ablation” and recommends both as first-line treatment over surgery. In Singapore, RFA costs approximately S$5,000–S$7,000 per leg before facility fees.
The 5-year data from the VeClose randomised controlled trial showed RFA closure rates of 85.2% at 5 years — robust, durable, and well-validated over two decades of clinical use. NICE Clinical Guideline 168 rates RFA and EVLA as equivalent under the umbrella of “endothermal ablation” and recommends both as first-line treatment over surgery. In Singapore, RFA costs approximately S$5,000–S$7,000 per leg before facility fees.
- Closure rate: ~96% at 3 months, ~85% at 5 years (VeClose RCT)
- Well-suited for GSV diameters 4–20mm — the most common range in clinical practice
- Requires tumescent local anaesthesia: multiple injections around the vein, which some patients find uncomfortable
- Post-procedure bruising and mild phlebitic reaction are common but resolve within 2–3 weeks
- Cost in Singapore: approximately S$5,000–S$7,000 per leg (excluding facility and anaesthetist fees)
EVLA: Laser Energy for Challenging Anatomy
Endovenous laser ablation uses a laser fibre — typically 1470nm wavelength in modern systems — to heat the vein wall from within. Like RFA, it is performed under duplex ultrasound guidance with tumescent anaesthesia. EVLA offers greater flexibility in treating tortuous veins and smaller-calibre tributaries that an RFA catheter cannot navigate easily.
The CLASS randomised controlled trial, the largest UK trial comparing EVLA, foam sclerotherapy, and surgery, found that at 5 years, EVLA had the highest probability (approximately 79%) of being cost-effective compared with foam and surgical stripping. Recurrence across all modalities reached up to 25% at 5 years — a figure worth being honest about with patients regardless of which technique is used. EVLA and RFA perform similarly in direct comparisons; the choice often comes down to vein anatomy and the operator's preference and experience. In Singapore, EVLA typically costs S$5,000–S$8,000 per leg.
The CLASS randomised controlled trial, the largest UK trial comparing EVLA, foam sclerotherapy, and surgery, found that at 5 years, EVLA had the highest probability (approximately 79%) of being cost-effective compared with foam and surgical stripping. Recurrence across all modalities reached up to 25% at 5 years — a figure worth being honest about with patients regardless of which technique is used. EVLA and RFA perform similarly in direct comparisons; the choice often comes down to vein anatomy and the operator's preference and experience. In Singapore, EVLA typically costs S$5,000–S$8,000 per leg.
- Particularly useful for tortuous tributaries and smaller accessory veins alongside the GSV
- Modern 1470nm wavelength reduces the post-procedure pain associated with older 810–980nm lasers
- NICE CG168 considers EVLA and RFA clinically equivalent — both preferred over surgery
- CLASS trial: EVLA ~79% probability of cost-effectiveness at 5 years vs foam sclerotherapy
- Cost in Singapore: approximately S$5,000–S$8,000 per leg
VenaSeal: No Heat, No Tumescent Injections
VenaSeal uses a medical-grade cyanoacrylate adhesive — essentially a highly controlled surgical glue — to mechanically seal the diseased vein. A catheter delivers small depots of glue at intervals along the GSV, and external compression seals the walls together. Crucially, no tumescent anaesthesia is required: there are no peri-venous injections, and the procedure can be performed with a single skin puncture under local anaesthetic.
The VeClose RCT demonstrated that VenaSeal was non-inferior to RFA at every time point: 99.0% vs 96% closure at 3 months, 94.4% vs 91.9% at 36 months, and 91.4% vs 85.2% at 5 years. A network meta-analysis of eight modalities published in the Journal of Vascular Surgery: Venous and Lymphatic Disorders ranked VenaSeal first for anatomic success, first for reduction of postoperative pain, and lowest for adverse events. The main caveat is hypersensitivity to the glue, which occurs in a small percentage of patients and can cause a local inflammatory reaction along the treated vein.
The VeClose RCT demonstrated that VenaSeal was non-inferior to RFA at every time point: 99.0% vs 96% closure at 3 months, 94.4% vs 91.9% at 36 months, and 91.4% vs 85.2% at 5 years. A network meta-analysis of eight modalities published in the Journal of Vascular Surgery: Venous and Lymphatic Disorders ranked VenaSeal first for anatomic success, first for reduction of postoperative pain, and lowest for adverse events. The main caveat is hypersensitivity to the glue, which occurs in a small percentage of patients and can cause a local inflammatory reaction along the treated vein.
- Closure rate: 99.0% at 3 months, 91.4% at 5 years (VeClose RCT) — non-inferior to RFA
- No tumescent anaesthesia needed — significantly more comfortable during the procedure
- Ranked #1 for anatomic success and lowest postoperative pain in 8-modality network meta-analysis
- Glue hypersensitivity reaction: occurs in ~3–5% of patients; usually mild and self-limiting
- Not yet universally Medisave-claimable in Singapore — confirm eligibility with your clinic before booking
Sclerotherapy: Precise, Affordable, and Right for the Right Vein
Sclerotherapy works differently from the thermal and adhesive techniques. A chemical agent — most commonly polidocanol or sodium tetradecyl sulphate — is injected directly into the varicose vein, causing the walls to swell, stick together, and eventually scar shut. For foam sclerotherapy, the agent is mixed with air or CO2 to create a foam that displaces blood and achieves better wall contact.
Sclerotherapy is the treatment of choice for spider veins (telangiectasias), reticular veins (the bluish veins just beneath the skin), and residual veins after trunk ablation — but it is not appropriate as monotherapy for large-diameter GSV reflux. The network meta-analysis ranked sclerotherapy sixth out of eight modalities for anatomic success in truncal vein closure. In Singapore, sclerotherapy costs approximately S$2,000–S$5,000 depending on the extent of disease, making it the most accessible option for patients with predominantly cosmetic concerns or small accessory veins.
Sclerotherapy is the treatment of choice for spider veins (telangiectasias), reticular veins (the bluish veins just beneath the skin), and residual veins after trunk ablation — but it is not appropriate as monotherapy for large-diameter GSV reflux. The network meta-analysis ranked sclerotherapy sixth out of eight modalities for anatomic success in truncal vein closure. In Singapore, sclerotherapy costs approximately S$2,000–S$5,000 depending on the extent of disease, making it the most accessible option for patients with predominantly cosmetic concerns or small accessory veins.
- First choice for spider veins, reticular veins, and post-ablation residual tributaries
- Not recommended as sole treatment for large-calibre GSV or SSV reflux
- Multiple sessions are usually needed — expect 2–4 over several months
- Ranked 6th out of 8 for truncal vein closure in network meta-analysis
- Most affordable option in Singapore: approximately S$2,000–S$5,000 per treatment course
How a Vascular Specialist Chooses Between Them
The decision starts with a duplex ultrasound scan — a non-invasive test that maps the venous anatomy and identifies which veins are refluxing (flowing backwards when they should be closing). At Paragon Medical Centre, we perform this in the clinic before any treatment discussion. No scan, no recommendation.
For most patients with great or small saphenous vein reflux and a vein diameter between 4mm and 15mm, any of the three endovenous techniques — RFA, EVLA, or VenaSeal — is clinically appropriate. The distinction is primarily in patient experience: VenaSeal is the most comfortable procedure because it requires no tumescent injections; RFA and EVLA require multiple peri-venous injections but have longer follow-up data. For veins larger than 15mm or those with significant tortuosity, EVLA often provides better catheter navigation. Sclerotherapy is then used to mop up residual tributaries after the trunk is closed.
For most patients with great or small saphenous vein reflux and a vein diameter between 4mm and 15mm, any of the three endovenous techniques — RFA, EVLA, or VenaSeal — is clinically appropriate. The distinction is primarily in patient experience: VenaSeal is the most comfortable procedure because it requires no tumescent injections; RFA and EVLA require multiple peri-venous injections but have longer follow-up data. For veins larger than 15mm or those with significant tortuosity, EVLA often provides better catheter navigation. Sclerotherapy is then used to mop up residual tributaries after the trunk is closed.
- Duplex ultrasound mapping is mandatory before any treatment decision
- Vein diameter <4mm: sclerotherapy or conservative management
- Vein diameter 4–15mm, straight anatomy: RFA, EVLA, or VenaSeal — patient preference guides choice
- Vein diameter >15mm or tortuous anatomy: EVLA often preferred
- Residual tributaries after trunk ablation: foam sclerotherapy to complete the treatment
What to Expect at a Vascular Clinic in Singapore
Most patients at our clinic in Paragon Medical Centre, Orchard Road, are treated as day-surgery cases — you arrive, have the procedure, rest briefly, and walk out the same day in a compression stocking. The procedure itself takes 30–60 minutes per leg. You will be asked to walk for 30 minutes after treatment to reduce the (already low) risk of deep vein thrombosis. Compression stockings are worn for 1–2 weeks post-procedure.
Recovery is quick by any standard. Most patients return to desk work within 1–2 days and resume exercise within 2 weeks. Flying within 48 hours after treatment is generally discouraged; beyond that, flying in compression stockings is considered safe for most patients. Driving is typically safe from the day after treatment.
In Singapore, RFA and EVLA performed for symptomatic varicose veins (aching, heaviness, skin changes, bleeding, or ulceration) are Medisave-claimable under applicable MOH withdrawal limits. VenaSeal eligibility varies — check with your clinic at the time of consultation.
Recovery is quick by any standard. Most patients return to desk work within 1–2 days and resume exercise within 2 weeks. Flying within 48 hours after treatment is generally discouraged; beyond that, flying in compression stockings is considered safe for most patients. Driving is typically safe from the day after treatment.
In Singapore, RFA and EVLA performed for symptomatic varicose veins (aching, heaviness, skin changes, bleeding, or ulceration) are Medisave-claimable under applicable MOH withdrawal limits. VenaSeal eligibility varies — check with your clinic at the time of consultation.
When Should You See a Vascular Specialist in Singapore?
Varicose veins are progressive: left untreated, reflux tends to worsen over years, leading to chronic venous insufficiency with skin changes (lipodermatosclerosis, hyperpigmentation), leg ulcers, and a significantly reduced quality of life. The best time to seek review is well before that stage.
See a vascular specialist in Singapore if you have veins that are visibly bulging, causing aching or heaviness after prolonged standing, associated with ankle swelling, or if the overlying skin is becoming discoloured or thickened. Bleeding from a varicose vein — which can occur after minor trauma — warrants urgent assessment. Cosmetic spider veins alone do not require urgent review but are entirely treatable at a vascular clinic on Orchard Road if they are causing distress.
See a vascular specialist in Singapore if you have veins that are visibly bulging, causing aching or heaviness after prolonged standing, associated with ankle swelling, or if the overlying skin is becoming discoloured or thickened. Bleeding from a varicose vein — which can occur after minor trauma — warrants urgent assessment. Cosmetic spider veins alone do not require urgent review but are entirely treatable at a vascular clinic on Orchard Road if they are causing distress.
- Aching, heaviness, or throbbing in the legs — especially after standing
- Visible bulging veins with overlying skin changes (brown discolouration, eczema, hardening)
- Ankle or lower leg swelling that is worse in the evening
- Bleeding from a vein after minor trauma — this is an emergency; apply pressure and seek care promptly
- Restless legs at night — venous reflux is an under-recognised cause
Frequently Asked Questions
Common Questions About Varicose Vein Treatments
What is the best varicose vein treatment in Singapore?
There is no single best treatment — the right choice depends on your vein anatomy, symptom severity, and preferences. For most patients with great saphenous vein reflux, VenaSeal, RFA (ClosureFast), and EVLA all achieve excellent results, with closure rates above 90% at 5 years in clinical trials. A duplex ultrasound scan at a vascular clinic will clarify which technique suits your specific anatomy.
Is VenaSeal better than RFA for varicose veins?
VenaSeal and RFA have similar long-term closure rates — 91.4% vs 85.2% at 5 years in the VeClose RCT, with VenaSeal showing non-inferiority. VenaSeal's main practical advantage is that it requires no tumescent anaesthesia, making the procedure more comfortable. RFA has a longer track record and broader Medisave eligibility in Singapore. Neither is universally superior.
How much does varicose vein treatment cost in Singapore?
Costs vary by technique and the number of veins treated. As a guide: RFA approximately S$5,000–7,000 per leg, EVLA S$5,000–8,000, and sclerotherapy S$2,000–5,000. Facility and anaesthetist fees are additional. Medisave can offset a meaningful portion of the cost for symptomatic varicose veins. Always obtain a formal quote including all fees before proceeding.
Can Medisave be used for varicose vein treatment in Singapore?
Yes, for symptomatic varicose veins that meet MOH criteria, Medisave withdrawal is permitted for RFA and EVLA procedures. The claimable amount depends on the specific procedure code and MOH withdrawal limits in effect at the time of treatment. VenaSeal eligibility varies — confirm with your clinic. Purely cosmetic spider vein treatment is generally not Medisave-claimable.
How long does recovery take after varicose vein treatment?
Most patients return to desk work within 1–2 days. Compression stockings are worn for 1–2 weeks. Exercise — brisk walking from day one, gym and running from 2 weeks — is encouraged, not restricted. Flying within 48 hours is best avoided; beyond that, wearing your compression stocking on the flight is sufficient precaution for most patients.
Is varicose vein treatment in Singapore permanent?
The treated vein is permanently closed and eventually reabsorbed. However, varicose veins can recur from previously undetected tributary veins or the development of new reflux over time — recurrence rates of 20–25% are reported at 5 years across all minimally invasive techniques. This is not a treatment failure; it reflects the progressive nature of chronic venous disease. Periodic review with duplex ultrasound helps catch any recurrence early.