Endovenous laser ablation, commonly abbreviated as EVLA (or EVLT), is a minimally invasive technique used to treat superficial venous incompetence, a condition in which faulty vein valves allow blood to pool and reflux backward through the leg veins. Rather than surgically removing the affected vein, EVLA uses a thin laser fiber inserted directly into the vein to deliver targeted thermal energy that causes the vessel to close and eventually be reabsorbed by the body. Patients considering treatment for varicose veins or chronic venous insufficiency often encounter EVLA as one of the primary options a physician may discuss, alongside other closure technologies described later in this article.
How Does Endovenous Laser Ablation Actually Close a Vein?
During EVLA, a physician uses ultrasound imaging to guide a thin catheter carrying an optical fiber into the diseased vein, typically the great saphenous vein or small saphenous vein. Once positioned, the laser fiber emits energy in short pulses or a continuous pull-back motion, heating the vein wall until it contracts, the vessel lining is injured, and the vein seals shut. Blood flow is then rerouted through healthier veins nearby. Local tumescent anesthesia is generally infiltrated around the vein before activation, which helps protect surrounding tissue from heat and adds a layer of comfort during the procedure.
What Wavelengths Are Used in EVLA Systems?
Endovenous laser systems have been developed using a range of wavelengths, generally falling between 810 nm and 1470 nm depending on the device and the chromophore being targeted (hemoglobin or water within the vein wall). Longer wavelengths, such as those near 1470 nm, are generally associated with more targeted absorption by water in the vein wall, which some clinicians associate with a more even heating pattern. Device selection, fiber type, and energy settings are determined by the treating physician based on vein diameter, tortuosity, and the patient's overall venous anatomy.
LaserBLOCK: An Example of a Modern EVLA Platform
INVAMED's LaserBLOCK Varicose Vein Laser System is one example of an endovenous laser platform designed for this type of procedure. It is offered in variants covering 810, 940, 980, and 1470 nm wavelengths, with bare-tip, radial-tip, or jacketed single-use fiber options ranging from approximately 400–600 µm (bare-tip) up to approximately 600–800 µm (radial-tip). The radial and bare-tip fiber designs are intended to help distribute energy along the vein wall during ultrasound-guided delivery. As with any EVLA system, the manufacturer notes that the device is not indicated for use in cases involving overly tortuous or very large veins, active local infection, or comorbidities that would preclude tumescent anesthesia. A qualified physician evaluates each patient's vein anatomy and medical history to determine whether laser ablation, or an alternative closure method, is an appropriate option.
Is EVLA the Same as Other Vein Closure Methods?
EVLA is one of several technologies used to close incompetent superficial veins. Other approaches include radiofrequency ablation, which uses a different energy source to achieve a similar thermal closure effect, and non-thermal options such as cyanoacrylate ("vein glue") closure or foam sclerotherapy, which do not rely on heat at all. Each technology has its own procedural characteristics, and the choice between them is generally guided by vein size, anatomy, patient comfort considerations, and physician experience rather than any single method being universally preferred. The varicose vein product category at INVAMED includes devices across several of these approaches.
What Happens After the Procedure?
Following EVLA, patients are commonly advised to wear compression stockings for a period determined by their physician and to walk regularly to support circulation while avoiding prolonged standing or strenuous activity for a short time. Mild bruising, tightness, or a pulling sensation along the treated vein is commonly reported in the days afterward, and most patients are able to resume normal daily activities relatively quickly, though exact recovery timelines vary by individual and by the extent of veins treated. Follow-up ultrasound imaging is typically scheduled to confirm that the treated vein has closed successfully.
Does endovenous laser ablation require general anesthesia?
No. EVLA is generally performed using local tumescent anesthesia injected around the vein, and most procedures do not require general anesthesia or an overnight hospital stay. The specific anesthesia approach is determined by the treating physician based on the extent of the procedure and patient factors.
How long does an EVLA procedure typically take?
Procedure time varies depending on the length and number of veins being treated, but EVLA is generally described as an outpatient procedure that can often be completed within an hour. A physician can provide a more precise estimate based on an individual's venous mapping and treatment plan.
Can every varicose vein be treated with laser ablation?
Not necessarily. Vein diameter, tortuosity, location, and a patient's broader medical history all factor into whether EVLA is a suitable option, and manufacturers of laser systems typically list contraindications such as excessively tortuous or very large veins. A qualified physician determines suitability after a clinical and ultrasound evaluation.
Device availability and regulatory status vary by country. Please contact INVAMED or your authorized local distributor for current regulatory information applicable to your region.