Endovenous coagulation for varicose veins
Prior to the late 1990s, the gold standard for the treatment of refluxing truncal veins was stripping and high ligation.
The shift towards endovenous treatments for venous reflux is attributable in part to the decreased morbidity, as well as the increased safety and efficacy of these procedures compared to open surgery, and to the portability of these procedures to the ambulatory setting.
The importance of thermal relaxation time has been pointed out in laser dermatology. However, pulse duration and thermal relaxation time have rarely been noted in the field of endovenous laser coagulation (EVLC). The efficacy of EVLC is said to be affected by the linear endovenous energy density or the endovenous fluence equivalent.
However, in addition to the amount of energy, the duration time of energy delivery would play a key role. EVLC using pulsed wave laser leads to fewer side effects than using a continuous wave laser. The enough short pulse duration and sufficiently long thermal relaxation time would avoid the excess temperature elevation, which leads to the thermal injury to the surrounding tissues and perforation of the vein wall.
We offer a 1.44 µm pulsed laser with a high pulse repetition rate. It allows coagulation of the vein without overheating the fiber tip, which completely eliminates the risk of vein wall perforation.
Spectral, energy and duration parameters are optimized so that vein coagulation occurs at energy doses from 30 to 50 J per centimeter, which limits the areas of thermal damage to soft and hard tissues in contact with the vein. This makes the method minimally traumatic, as well as significantly reduces the rehabilitation period and reduces the patient's pain.
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