1940nm Diode Laser EVLT Spider Vein Removal Skin Rejuvenation Portable Clinical Beauty Equipment

What Is Endovenous Laser Treatment (EVLT)?

Endovenous Laser Treatment (EVLT) is a minimally invasive procedure used to treat varicose veins. Varicose veins occur when venous valves weaken, leading to blood pooling in the lower limbs. This results in visible, enlarged, and twisted veins, often accompanied by symptoms such as swelling, fatigue, skin discoloration, and, in advanced cases, venous ulcers.

Optimal Wavelength for EVLT

The 1940nm wavelength demonstrates the highest absorption in water compared to earlier laser wavelengths (808nm, 980nm, and 1470nm). Since venous walls contain a high proportion of water, this allows for more efficient and targeted energy delivery.

Clinical studies show that:

1940nm has significantly higher absorption than 1470nm

It is several times more efficient than 980nm

Requires lower operating power (4–6W), improving safety and precision

Procedure Overview

EVLT is typically performed in an outpatient setting:

Ultrasound is used to identify and mark the treatment area

Local anesthesia is applied

A small incision is made, and a laser fiber is inserted into the vein

Laser energy is delivered while withdrawing the fiber, closing the vein

No sutures are required; compression stockings are applied

Patients can return to normal activities immediately

Mechanism of Action

Precision Energy Absorption
The 1940nm laser is selectively absorbed by water in the vein wall, ensuring accurate targeting.

Direct Vein Closure
Thermal energy causes collagen contraction and endothelial damage, sealing the vein.

Natural Absorption
The treated vein gradually fibroses and is naturally absorbed by the body over time.

Key Clinical Advantages

 Virtually Bruise-Free

Since the primary chromophore is water rather than hemoglobin, vessel rupture and erythrocyte extravasation are minimized, resulting in little to no post-treatment bruising.

 Lower Risk of Hyperpigmentation

Energy remains confined within the vessel wall, reducing thermal diffusion into adjacent tissues and significantly lowering the incidence of post-inflammatory hyperpigmentation.

 Concurrent Skin Tightening

Localized thermal stimulation promotes collagen denaturation and remodeling in the dermis, providing a secondary benefit of skin tightening in the treated area.

Enhanced Patient Comfort

The selective and localized action reduces stimulation of perivascular nerves, improving comfort during the procedure and shortening recovery time.