This article explains, in educational terms, endovenous laser ablation — how the technology works and where it fits. Modern management has shifted from open surgical stripping toward catheter-based endovenous techniques that are typically performed under local anesthesia in an outpatient setting. 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
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. 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. 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.
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. Fiber design matters: radial-emitting fibers distribute energy circumferentially around the vein wall, which is often associated with more uniform heating than older bare-tip fibers. INVAMED's LaserBLOCK platform is built around a 1470 nm wavelength with bare and radial fiber options; the manufacturer positions the 1470 nm system as designed to reduce bruising compared with legacy 980 nm devices.
Design and Technical Notes
INVAMED groups its venous portfolio around the way each device closes an incompetent vein, giving clinicians thermal, non-thermal, and adjunct options. Accurate duplex ultrasound mapping before treatment is central to identifying the source of reflux and planning device placement. Graduated compression is commonly used after ablation to support the treated limb, per clinician protocol.
Key Considerations
- All INVAMED venous devices are intended for use by trained clinicians under ultrasound guidance and per the IFU.
- Accurate duplex ultrasound mapping before treatment is central to identifying the source of reflux and planning device placement.
- Device figures cited by INVAMED describe studied performance and should not be read as individual guarantees.
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.
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).
What wavelength does the INVAMED laser use?
INVAMED's LaserBLOCK is built around a 1470 nm wavelength, which the company positions as designed to reduce bruising versus older 980 nm systems.
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.
Clinical and Technical Context
INVAMED reports 95%+ efficacy for saphenous reflux with ThermoBLOCK; as with all such figures, real-world outcomes are determined by patient selection and technique. Sealing the refluxing axial vein is intended to reduce the venous hypertension that drives symptoms and visible tributaries. 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. A staged, anatomy-led approach is standard, and the sequence of treatment is planned by the treating physician. All INVAMED venous devices are intended for use by trained clinicians under ultrasound guidance and per the IFU. 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. Vein diameter, depth, and tortuosity influence whether a thermal or non-thermal device is more suitable. 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.
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.