Dual Wavelength 980nm 1470nm Diode Laser Medical System for Endovenous Vein Treatment, Varicose Vein Closure, Leg Vein Therapy, Vascular Surgery, Minimally Invasive Vein Removal Device

Dual Wavelength 980nm 1470nm Diode Laser Medical System for Endovenous Vein Treatment, Varicose Vein Closure, Leg Vein Therapy, Vascular Surgery, Minimally Invasive Vein Removal Device

1) Technology Principle (EVLT Mechanism)

Endovenous Laser Treatment (EVLT) is a minimally invasive method to treat varicose veins and venous insufficiency. The dual-wavelength 980nm + 1470nm diode laser combines optimal absorption in hemoglobin (980nm) and water (1470nm), providing:

• 980nm Channel (Hemoglobin affinity): Stronger interaction with intraluminal blood components supports coagulation and helps in initiating vessel closure.

• 1470nm Channel (Water affinity): Highly selective for water in venous endothelium and vein wall, generating homogeneous circumferential heating. This leads to endothelial destruction, collagen contraction, and permanent vein occlusion.

Optical Fiber Delivery:

• A radial emitting fiber or bare-tip fiber is introduced into the incompetent saphenous vein under ultrasound guidance.

• Energy is applied as the fiber is slowly withdrawn (pullback technique), producing controlled thermal damage along the entire vein wall.

• This results in fibrotic closure and eventual absorption of the diseased vein.

Pulse & Power Control:

• Pulse duration (15–100ms) and repetition frequency (1–20Hz) allow precise thermal dosing.

• Pulsed operation avoids carbonization while ensuring uniform heating of vein walls.

• 980nm + 1470nm synergy provides better balance between efficacy (closure rate) and safety (less pain, fewer burns) compared to single-wavelength systems.

2) Application Scope

Primary Indications

• Varicose veins of the lower limbs (e.g., great saphenous vein, small saphenous vein incompetence).

• Chronic venous insufficiency (CVI) related to reflux.

• Recurrent varicose veins after surgery or sclerotherapy.

• Superficial venous reflux with symptoms such as leg heaviness, swelling, skin pigmentation, venous eczema.

Advantages of EVLT

• Minimally invasive alternative to vein stripping and ligation.

• Performed under local or tumescent anesthesia, often as an outpatient procedure.

• High success rate (>95% vein closure reported in many studies).

• Short recovery, low recurrence, minimal scarring.

• Compatible across all skin types since energy acts endovenously.

3) Product Attributes (Parameters for EVLT Use)

4) Product Details (EVLT Function)

4.1 Fiber Options

• Bare-tip fiber: Emits forward light; effective but may cause higher local heating.

• Radial fiber: Emits energy circumferentially (360°) along the vein wall, reducing perforation risk and producing more uniform closure.

4.2 Energy Delivery Strategy

• Tumescent anesthesia is injected around the vein to:

  • Provide anesthesia.

  • Compress the vein around the fiber for closer wall contact.

  • Protect surrounding tissue by absorbing heat.

• Pullback Technique: Fiber is withdrawn slowly (≈1–3 mm/s) while delivering continuous or pulsed energy.

• Thermal Endpoint: Uniform vein wall shrinkage, vein closure confirmed via ultrasound.

4.3 Clinical Workflow

1. Diagnosis & Mapping: Duplex ultrasound to confirm reflux and vein anatomy.

2. Access & Insertion: Ultrasound-guided puncture, sheath placement, fiber insertion to saphenofemoral junction (SFJ).

3. Tumescent Injection: Perivenous infiltration under ultrasound.

4. Laser Activation: Deliver energy while withdrawing fiber.

5. Completion: Check closure by ultrasound; apply compression stockings.

5) Pre- and Post-Procedure Care

Pre-Procedure

• Complete duplex ultrasound evaluation.

• Discontinue anticoagulants if medically safe and physician approved.

• Patient must avoid active infection or severe arterial disease.

Post-Procedure

• Compression stockings for 1–2 weeks (depending on vein size).

• Ambulation encouraged immediately to reduce thrombosis risk.

• Avoid strenuous exercise or prolonged standing for 48h.

• Follow-up ultrasound within 1–4 weeks to confirm closure.

6) Contraindications

• Pregnancy and lactation.

• Acute deep vein thrombosis (DVT).

• Severe peripheral arterial disease.

• Known photosensitivity or contraindicated medications.

• Inability to ambulate after the procedure.

• Active infection in treatment area.

7) Clinical Benefits of 980+1470nm Dual Wavelength EVLT

• Enhanced Closure Rate: Dual absorption spectrum improves reliability.

• Reduced Pain & Bruising: 1470nm’s water absorption causes less perivenous heat spread.

• Fewer Complications: Lower risk of nerve injury and burns.

• Flexible Protocols: Power and pulse customizable for vein diameter and depth.

• Universal Application: From small saphenous to large saphenous veins.