Unlocking Superior Occlusion, Minimal Postoperative Pain, and Rapid Outpatient Recovery in Modern Phlebology
Chronic venous insufficiency (CVI) and lower limb varicose veins affect hundreds of millions of individuals worldwide, causing chronic leg heaviness, edema, pain, stasis dermatitis, and recurring venous ulcers. While conventional surgical stripping (high ligation and stripping) once served as the primary clinical treatment, modern vascular surgery has shifted decisively toward minimally invasive endovenous thermal ablation. Today, Endovenous Laser Treatment (EVLT / EVLA) represents the gold standard recommended by international phlebology consensus—delivering superior occlusion rates, exceptional cosmetic outcomes, and virtually zero hospital stay.
To resolve the persistent limitations of early monochromatic lasers—such as postoperative ecchymosis, heat-induced pain, and recanalization risks—TRIANGEL introduces its flagship V6 Dual-Wavelength Surgical Diode Laser System (980nm + 1470nm), engineered specifically in combination with proprietary 360° Radial Optical Fiber Technology for flawless endovascular occlusion.
1. Dual-Chromophore Affinity: The Biophysical Superiority of 980nm + 1470nm
The fundamental clinical success of EVLT rests on targeted photothermal occlusion: transferring optical energy into thermal energy to denature the collagen matrix of the vein wall (intima and media), inducing permanent vessel contraction and subsequent fibrous obliteration. The TRIANGEL V6 platform utilizes two highly complementary wavelengths to optimize both water and hemoglobin absorption:
*1470 nm — Selective Water Absorption for Gentle, Shallow Ablation: Water is the predominant chromophore in the endothelial lining and vein wall. The 1470nm wavelength demonstrates an absorption coefficient in water approximately 40 times higher than that of 980nm, and orders of magnitude higher than 810nm or 1064nm. This allows thermal energy to be confined to an extremely shallow, strictly controlled ablation zone within the vein wall. Consequently, steam bubble formation is minimized, perivascular nerve irritation is avoided, and postoperative ecchymosis (bruising) is dramatically reduced.
*980 nm — High Hemoglobin Absorption for Rapid Coagulation and Hemostasis: While 1470nm remodels the structural collagen of the vessel wall, 980nm matches the peak absorption spectrum of oxyhemoglobin and deoxyhemoglobin. This delivers immediate intravascular photocoagulation, sealing collateral venous tributaries and preventing intraoperative extravasation and bleeding.
★ CLINICAL VALUE NOTE: LOWER ENERGY, HIGHER COMFORT
Clinical Consensus: The synergistic combination of 980nm and 1470nm allows surgeons to operate at significantly lower total fluence (Joules/cm) compared to single-wavelength 980nm units, achieving identical 100% immediate vein occlusion while reducing patient pain scores (VAS) by over 65%.
2. 360° Radial Optical Fiber: Uniform Circumferential Emission
A major breakthrough in modern EVLT is the transition from conventional bare-tip fibers to specialized cylindrical Radial Optical Fibers. Bare-tip fibers fire laser energy forward along the vessel axis, which frequently causes uneven localized heating, peak thermal spikes, and a recognized risk of vein wall perforation. In contrast, the TRIANGEL Radial Optical Fiber introduces a proprietary refractive silica micro-prism at the distal tip:
*True 360° Circumferential Delivery: Energy is radiated uniformly in a complete 360-degree cylinder perpendicular to the vessel wall, ensuring homogeneous collagen shrinkage around the entire vein circumference as the fiber is drawn backward.
*Elimination of Perforation and Carbonization: By avoiding direct contact between an intensely hot forward-firing fiber tip and the vein intima, radial emission prevents focal vein wall burn-through and skin hyperpigmentation.
*Optical Coupling Guarantee (<20% Energy Loss): Many generic fibers in the market suffer optical coupling transmission losses exceeding 20%, resulting in sub-therapeutic energy delivery and long-term vein recanalization. The TRIANGEL LASEEV system guarantees precision SMA905 coupling, ensuring 100% of calibrated nominal energy is transferred intact into the clinical field.
3. Standardized Outpatient Clinical Protocol: Walk-In, Walk-Out Ambulatory Care
The TRIANGEL V6 EVLT protocol is engineered for streamlined ambulatory execution under local tumescent anesthesia. A typical saphenous vein ablation procedure requires only 25 to 40 minutes and follows a strict five-stage clinical protocol:
• Step 1: Ultrasound-Guided Puncture: Under Duplex ultrasound guidance, percutaneous access is established at the medial malleolus or below the knee using an 18G puncture needle.
• Step 2: Hydrophilic Guidewire Placement: A 0.035-inch hydrophilic guidewire is advanced smoothly through the catheter lumen into the great saphenous vein (GSV).
• Step 3: Distance Measurement to SFJ: The length from the puncture point to the projection of the saphenofemoral junction (fossa ovalis) is precisely calibrated under ultrasound.
• Step 4: Multi-Purpose Catheter & Radial Fiber Positioning: The delivery sheath is positioned 1.5–2.0 cm distal to the epigastric vein junction, and the 360° radial fiber is loaded.
• Step 5: Tumescent Anesthesia & Laser Ablation: Cold tumescent solution is infiltrated perivascularly to create a protective fluid cushion and collapse the vein wall onto the fiber. The V6 diode laser is activated in continuous wave (CW) mode as the fiber is systematically drawn back at 1–2 mm/sec (target Linear Endovenous Energy Density: 50–70 J/cm).
Post-Procedure Management: Compression bandages or class-II medical compression stockings are applied immediately along the treated leg. Patients are encouraged to ambulate immediately for 20 minutes and can return home immediately. Compression is maintained for 7 to 14 days. Subsequent Duplex ultrasound confirms segmental fibrosis, low echo, non-compressibility, and complete absence of reflux.
Post time: Oct-28-2026