Endovenous laser ablation relies on laser energy being absorbed by tissue to generate the heat that closes an incompetent vein, and the wavelength selected changes how that energy is absorbed. Two wavelengths frequently discussed in the varicose vein literature are 980 nm and 1470 nm. Understanding the difference matters because wavelength influences the primary chromophore being targeted, which in turn affects how energy is delivered along the vein wall during 1470nm laser ablation and its earlier counterparts.
What Is Different Between 980 nm and 1470 nm Lasers?
The main distinction lies in which tissue component absorbs the laser energy most efficiently. Earlier-generation 810–980 nm wavelengths are absorbed primarily by hemoglobin within the blood column, meaning the laser's effect depends heavily on the presence of blood in contact with the fiber tip. The 1470 nm wavelength, by contrast, is absorbed far more strongly by water, which is abundant in the vein wall itself rather than only in the blood. This shift toward water absorption is commonly described in the endovenous literature as allowing more energy to be directed at the vein wall tissue rather than relying on blood as an intermediary.
Why Does Water Absorption Change the Treatment Experience?
Because the 1470 nm wavelength targets water in the vein wall directly, treatment protocols using this wavelength are often associated with lower total energy requirements per centimeter of vein treated compared to earlier hemoglobin-targeting wavelengths. This has been linked in published reports to reduced perivenous thermal spread, which may correspond to less post-procedure bruising and tenderness for some patients, though individual experiences vary considerably based on vein diameter, fiber type, and technique. It is important to note that outcomes depend on many procedural factors beyond wavelength alone, including linear endovenous energy density and whether a radial or bare-tip fiber is used.
Does Wavelength Alone Determine Treatment Success?
Wavelength is one variable among several that influence endovenous laser ablation outcomes; fiber design, the physician's energy settings, tumescent anesthesia technique, and vein anatomy also play significant roles. Comparative studies of different wavelengths have generally reported similar closure rates when energy delivery is properly calibrated, suggesting that wavelength selection is often a matter of the treating physician's training and preference rather than one wavelength being categorically superior for all cases. A qualified physician determines which approach is appropriate based on the specific vein being treated and available equipment.
How Does INVAMED's LaserBLOCK System Address Wavelength Options?
The LaserBLOCK Varicose Vein Laser System is manufacturer-reported to be available in multiple wavelength configurations, including 810, 940, 980, and 1470 nm variants, along with bare-tip, radial-tip, and jacketed single-use fiber options. This range allows treating physicians to select a configuration consistent with their preferred technique for sealing the great saphenous vein, small saphenous vein, or other incompetent superficial veins under ultrasound guidance. Additional information on endovenous ablation technologies is available on the varicose vein products page.
Can patients choose which wavelength is used for their procedure?
The choice of wavelength and fiber type is generally made by the treating physician based on training, available equipment, and the specific vein anatomy involved. Patients can discuss the rationale for a particular technology with their physician prior to the procedure.
Device availability and regulatory status vary by country. Please contact INVAMED or your authorized local distributor for current regulatory information applicable to your region.