This article compares two approaches side by side to clarify how they differ in principle and practice. 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. 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. 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.
EVLA (laser) vs RFA (radiofrequency): Key Differences
Both endovenous laser ablation and radiofrequency ablation are thermal techniques that seal a vein with heat and both are well established for saphenous reflux. Laser systems deliver energy as light through a fiber, while RF systems heat the wall through a catheter element with temperature feedback. Clinically, published comparisons generally show broadly similar closure rates, with differences often reported in post-procedure bruising or discomfort rather than long-term closure. INVAMED offers both modalities — LaserBLOCK and ThermoBLOCK — so the choice can follow anatomy and clinician preference rather than device availability.
How INVAMED Supports Both Approaches
INVAMED groups its venous portfolio around the way each device closes an incompetent vein, giving clinicians thermal, non-thermal, and adjunct options. Procurement teams should confirm local regulatory registration and indication status, which vary by market. Catheter shafts, fiber options, and RF stylets are offered in ranges intended to cover varied vein anatomy; exact specifications are provided in product documentation.
Key Considerations
- Device figures cited by INVAMED describe studied performance and should not be read as individual guarantees.
- Accurate duplex ultrasound mapping before treatment is central to identifying the source of reflux and planning device placement.
- All INVAMED venous devices are intended for use by trained clinicians under ultrasound guidance and per the IFU.
Frequently Asked Questions
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.
What is the regulatory status of these devices?
Device availability and regulatory status vary by country. Please contact INVAMED or your authorized local distributor for current regulatory information applicable to your region.
Does INVAMED offer both thermal and non-thermal vein devices?
Yes. INVAMED's venous line includes thermal systems (LaserBLOCK laser and ThermoBLOCK radiofrequency) and a non-thermal cyanoacrylate system (VenaBLOCK).
Clinical and Technical Context
As with all venous treatments, the agent, concentration, and volume are selected by the clinician for the specific vein being treated. INVAMED's ThermoBLOCK system pairs an RF generator with dedicated catheters and stylets and, according to the company, maintains vein-wall temperatures in the 85–120 °C range depending on protocol. Modern management has shifted from open surgical stripping toward catheter-based endovenous techniques that are typically performed under local anesthesia in an outpatient setting. Vein diameter, depth, and tortuosity influence whether a thermal or non-thermal device is more suitable. Varicose veins are enlarged, twisted superficial veins that develop when the one-way valves inside leg veins no longer close properly, allowing blood to pool — a process clinicians call venous reflux. 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. INVAMED's VenaBLOCK is its NTNT offering; candidacy is still assessed individually because vein size and location influence which method is appropriate. INVAMED reports 95%+ efficacy for saphenous reflux with ThermoBLOCK; as with all such figures, real-world outcomes are determined by patient selection and technique.
Related on INVAMED
- Varicose Vein — product category
- A Clinical Introduction to Non-Thermal Non-Tumescent (NTNT) Ablation
- VeinOFF Varicose Vein Treatment Agent — Technical Overview
- Varicose Vein: A Complete Technical Guide
Important Disclaimer
This content is educational and technical in nature and must not be interpreted as medical advice or as a promise of any clinical outcome. Individual results depend on many factors and can only be evaluated by a treating physician. Figures attributed to INVAMED reflect manufacturer or published data and are not a guarantee of results. All INVAMED devices are to be used by trained clinicians per the approved IFU, and availability is subject to local regulatory status.
Reviewed by the INVAMED Medical Affairs team. Content is educational and technical in nature.