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The LIS® (Laser Intradermal Stimulation) is an innovative concept in laser therapy.. It was developed at Dermocentro (São José dos Campos – Brazil) to stimulate or treat dermal targets by means of optic fibers introduced in the dermis or subcutaneous tissue (figure 1), thereby avoiding that the epidermis be damaged or affected by the therapeutic light.
It is important to point out that in conventional laser treatments most of this therapeutic light is lost in the epidermis, by means of coolings or coupling gels, i.e., only a small fraction of the energy actually reaches the target.
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Characteristics of the LIS® procedure
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The fluence employed in the LIS® is much lower than that used in conventional laser treatments, without decreasing the effectiveness of the final result;
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The LIS® is painless; patients refer to a slight warming as the fiber passes through. The anesthesia, whenever necessary, is local and done only at the point where the fiber is introduced;
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The physician marks up the wrinkles using specific markers. By using a guide light, it is possible to know the exact location where the fiber is passing through (see figures 2 and 3);
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With the LIS®, since there is no light penetration through the epidermis, the possibilities of any scarring or dischromic sequelae are remote;
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The LIS® can be done at any time of the year, even when the patient is sun-tanned;
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The LIS® can be used on any phototype;
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With the LIS®, the physician has full control over the procedure. The depth of the light action does not depend on the wavelength nor on the diameter of the laser spot, but rather on the depth to which the fiber is introduced (figure 1);
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Use of equipment with accessible costs, without the use of consumables;
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Since it is invasive, the procedure is only done by physicians;
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The final result depends exclusively on the physician, especially with regard to his/her manual skill and physiopathological knowledge;
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When the patient is properly informed about the method, he or she accepts it easily since the treatment does not involve the injection of toxins, prosthesis or fillers;
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Ideal for treating patients that still do not have well-defined wrinkles. For example, a frequent complaint is “my parents have wrinkles around the mouth and around the eyes; how can I avoid these?”;
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The first equipment developed for this technique is the Diode-Pro Laser-980 nm Diode. It is a surgical laser that issues light through optic fibers;
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272 micra optic fibers and protocols have been developed in a blue tone that are specific for the procedure.
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The fiber is easy to sterilize, easy debris removal using a specific stripper (fiber pealing device).
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FIGURE 1 – THE LIS® OFFERS THE MEDICAL PROFESSIONAL WITH THE OPTION OF INTRODUCING THE OPTIC FIBER AT THE DESIRED DEPTH, THEREBY MAKING THE TREATMENT EXTREMELY SELECTIVE. IN CONVENTIONAL PROCEDURES, IN ORDER TO OBTAIN THE SAME RESULTS, THE MEDICAL PROFESSIONAL NEEDS TO RELY ON VARIOUS LASER DEVICES, EACH HAVING A DIFFERENT WAVELENGTH. |
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FIGURE 2 – ALL WRINKLES HAVE BEEN MARKED. OBSERVE THE OPTIC FIBER (BRIGHT LIGHT BLUE TONE – AT THE BOTTOM LEFT CORNER) PENETRATING THE DERMIS AND STIMULATING THE COLLAGEN FIBERS POINT BY POINT AT THE WRINKLE DEPRESSION. THE PROCEDURE IS ALMOST PAINLESS, WHERE ONLY THE SPOT WHERE THE FIBER IS INTRODUCED IS ANESTHETIZED. DURING LASER EMISSION, THE SENSATION REFERRED TO BY THE PATIENT IS OF A SLIGHT WARMING. |
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FIGURE 3 – THE OPTIC FIBER WAS MOVED TOWARDS THE INFRAPALPEBRA WRINKLES, WHICH ARE INACCESSIBLE USING OTHER WRINKLE CORRECTION TECHNIQUES.
THE BLUE LINE REPRESENTS THE LOCATION ON THE DERMIS ALONG WHICH THE OPTIC FIBER WAS POSITIONED, THE RED AREA IS THE THERAPEUTIC LIGHT OF THE LASER WHEN WORKING. |
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45 days after a LIS® session |
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before |
45 days after a LIS® session |
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before – phototype IV |
30 days after a LIS® session |
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Spanish version
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