Varicose vein treatment laser EVLA

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The 1940 nm diode laser is an Endovenous Laser Ablation (EVLA) device designed to ablate varicose veins by delivering a wavelength highly absorbed by water for a focused thermal effect and reduced collateral tissue injury.

How it works

• High water absorption: 1940 nm light is strongly absorbed by water, producing concentrated heating within the vein wall and causing selective thermal damage.
• Controlled energy: Lower power settings (for example 4–6 W referenced) can achieve effective treatment while limiting thermal spread to surrounding tissues.
• Vein closure: Thermal injury leads to collapse and sealing of the vein; the treated vein is subsequently reabsorbed by the body.

Key advantages

• Patient comfort: Lower reported pain during and after the procedure with reduced incidence of bruising or skin pigmentation changes.
• Safety & efficacy: High vein closure rates reported with low complication rates; clinicians should be aware of Endovenous Heat-Induced Thrombosis (EHIT) risk in specific anticoagulation contexts.
• Faster recovery: Shorter convalescence and quicker return to normal activities compared with some older techniques.
• Advanced EVLA generation: Considered a later-generation EVLA wavelength offering improved water-targeting compared with older wavelengths.

Comparison to other lasers

• Versus 980 nm: 1940 nm is absorbed much more by water; 980 nm favors hemoglobin absorption, making 1940 nm potentially more efficient for vein wall targeting.
• Versus 1470 nm: 1940 nm provides higher water absorption than 1470 nm, which may translate into increased procedural comfort while maintaining comparable closure rates.

Clinical use

• Treats incompetent saphenous trunks and tributaries (e.g., great saphenous vein [GSV], small saphenous vein [SSV]).
• Commonly combined with compression therapy and, when indicated, adjunctive phlebectomy or foam sclerotherapy.

Technical specifications

• Wavelength: 1940 nm (diode laser)
• Intended use: Endovenous Laser Ablation (EVLA) for varicose vein treatment
• Typical power settings: lower-power ranges cited (example 4–6 W)
• Mechanism: water-targeted absorption producing focused heating of the vein wall
• Generation: described as later/5th-generation EVLA technology
• Clinical outcomes: high vein closure rates; reduced pain, bruising, burns or pigmentation compared with older wavelengths
• Advantages: precise thermal effect, reduced procedure discomfort, shorter recovery times
• Targets: great saphenous vein (GSV), small saphenous vein (SSV) and tributaries