This guide offers an educational, technical overview of varicose vein and the device technologies used in this field. Device selection depends on vein anatomy, diameter, tortuosity, and clinician preference, and is always determined on a case-by-case basis by the treating physician. As a medical device manufacturer, INVAMED develops technologies in this area; the information here is educational and not medical advice.
Background: Varicose Veins and Chronic Venous Insufficiency
Chronic venous insufficiency (CVI) sits on the same disease spectrum and can present with aching, heaviness, swelling, skin changes, and in advanced cases venous ulceration. Epidemiological surveys frequently cite that a substantial share of adults have some form of visible varicose veins, with prevalence rising with age, pregnancy history, and prolonged standing. Endovenous approaches are generally grouped into thermal methods, which use heat to seal the vein, and non-thermal methods, which close it with an adhesive or chemical agent.
Core Technologies and Options
Endovenous Laser Ablation (EVLA). Endovenous laser ablation delivers laser energy through a thin optical fiber positioned inside the target vein under ultrasound guidance. The energy heats the vein wall so that it contracts and seals, redirecting blood into healthier deep veins over time. Radiofrequency Ablation (RFA) for Veins. Radiofrequency ablation uses a catheter that heats the vein wall through radiofrequency energy rather than laser light, typically in controlled segmental cycles. Continuous temperature and impedance feedback allows the generator to regulate power and maintain a target wall temperature. Cyanoacrylate Closure (Vein Glue). Cyanoacrylate closure is a non-thermal method that deposits a small volume of medical adhesive inside the vein, which polymerizes and seals the lumen. Because it does not rely on heat, it usually avoids the tumescent anesthesia needed to protect surrounding tissue during thermal ablation. Saphenous Vein Ablation. The great and small saphenous veins are the most common sources of reflux, so ablation strategies frequently target these axial veins. Accurate ultrasound mapping of the sapheno-femoral or sapheno-popliteal junction guides where the catheter tip is positioned before energy or adhesive is delivered. Devices for Venous Insufficiency. Chronic venous insufficiency management may combine axial vein ablation with treatment of tributaries and perforators. For smaller reticular or perforating veins, dedicated small-vein RF needles and fine catheters allow targeted closure. Sclerotherapy and Adjunct Agents. Sclerotherapy injects a liquid or foamed agent that irritates the vein lining and causes it to close, and is often used for smaller tributary and spider veins. It is frequently combined with endovenous ablation of the underlying axial vein rather than used alone for large-diameter reflux.
Comparing the Approaches
EVLA (laser) vs RFA (radiofrequency). Both endovenous laser ablation and radiofrequency ablation are thermal techniques that seal a vein with heat and both are well established for saphenous reflux. Clinically, published comparisons generally show broadly similar closure rates, with differences often reported in post-procedure bruising or discomfort rather than long-term closure. Vein glue (cyanoacrylate) vs Radiofrequency ablation. Cyanoacrylate closure is non-thermal and typically avoids tumescent anesthesia, whereas radiofrequency ablation is thermal and generally requires it. Both aim to permanently close the refluxing vein; reported medium-term closure rates for each are high in the published literature and in INVAMED's own figures. Cyanoacrylate closure vs Endovenous laser ablation. Cyanoacrylate closure seals the vein with adhesive and no heat, while endovenous laser ablation uses thermal energy from a fiber. Laser ablation, particularly with modern radial 1470 nm fibers, is designed to limit collateral heating and bruising.
INVAMED Portfolio in This Area
INVAMED's related devices include: VenaBLOCK Non-Thermal Treatment for Vein Disease & Varicose Veins, ThermoBLOCK Varicose Vein Radiofrequency Ablation System, ThermoBLOCK Thermal Coagulation RF Ablation Small Vein Needle, LaserBLOCK Varicose Vein Laser System, LaserBLOCK Endovenous Bare & Radial Fiber Optics, VeinOFF Varicose Vein Treatment Agent. Detailed specifications for each are provided in the product documentation.
Key Considerations
- Device figures cited by INVAMED describe studied performance and should not be read as individual guarantees.
- All INVAMED venous devices are intended for use by trained clinicians under ultrasound guidance and per the IFU.
- Vein diameter, depth, and tortuosity influence whether a thermal or non-thermal device is more suitable.
Frequently Asked Questions
Can varicose veins come back after treatment?
Treated veins are intended to stay closed, but new varicose veins can develop over time because treatment addresses existing disease rather than the underlying predisposition.
Is endovenous ablation done as day surgery?
Endovenous ablation is typically an outpatient, minimally invasive procedure performed under local anesthesia, though the exact setting is determined by the clinician and facility.
Who decides which vein treatment is appropriate?
Only a qualified clinician can decide, based on ultrasound mapping and individual assessment; this article is educational and not a treatment recommendation.
About INVAMED
Device availability and regulatory status vary by country. Please contact INVAMED or your authorized local distributor for current regulatory information applicable to your region.
Related on INVAMED
- Varicose Vein — product category
- Is varicose vein treatment painful?
- Inside the VenaBLOCK Non-Thermal Treatment for Vein Disease & Varicose Veins: Design and Applications
- Comparing Sclerotherapy and Laser treatment
Important Disclaimer
This article is intended for general educational and technical information about medical device technologies. It is not medical advice, a diagnosis, or a treatment recommendation, and it does not replace consultation with a qualified healthcare professional. Any decision about diagnosis or treatment should be made by a licensed clinician based on an individual assessment. INVAMED devices are intended for use by trained healthcare professionals in accordance with the applicable Instructions for Use (IFU) and local regulatory approvals. Product availability and indications vary by country.
Reviewed by the INVAMED Medical Affairs team. Content is educational and technical in nature.