**6. Types of treatment and response to therapy**

**•** Blue array: The blue light emitting LED array contains 30 high brightness LEDs of 5mm,

**•** Yellow array: The blue light emitting LED array contains 30 high brightness LEDs of 5mm,

with wavelength between 465nm and 470nm. Operates at 4V and 25mA.

with wavelength between 585nm and 590nm. Operates at 3, 6V and 22mA.

**Figure 13.** Prototype schematics.

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Figure 14 shows the prototype used in the laboratory.

**Figure 14.** Numerous tests were performed with the prototype before manufacturing the device.

The concentration of light coming from the LED bulb can concentrate light to a certain point of light that can have a high ratio in millicandelas, but passing through the skin undergoes a dispersion of its light concentration. The rate control devices are important because the total light energy emitted by the LED or energy in Watts per square centimeter in units of mW/cm2 is essential [15].

If the designer decides to use his knowledge to choose a less expensive way to manufacture power supply, then the power converter should be about 2 or 3 times more than the total of its light energy. The maximum light output of the output device is the source of half the power (W = Volt x Amps) of the transformer. The mW/cm2 is the total light energy in mW divided by the length and breadth of the array of LEDs in cm.

#### **6.1. Criteria, control and response to treatment of the patients who were treated by red and blue light emitted by high-brightness LEDs**

Patients who are subject to the treatment will be properly classified with the criteria establish‐ ed by the doctors who assist in the implementation of therapy. Among them, age, sex, physi‐ cal condition and mental health. The therapy was performed with LEDs Hospital Regional do Oeste in the city of Chapecó/SC, Brazil.

The first case is from a patient who had put breast prosthesis. The prothesis were large and a few days later, streaks appeared (Figures 15 and 16). Stretch marks are linear atrophies which arise due to the disruption of elastic fibers that support the middle layer of the skin. General‐ ly,this breakup is from mechanical stress, such as excessive stretching ofthe skin, or physiolog‐ ical stress, stimulated by hormones. When the fibers are broken, they are filled with blood, becoming primarily redish, but over the time they acquire a white color. This patient under‐ went a medical evaluation and its treatment was approved. 15 sessions were held in 44 days. The application time for each session was 40 minutes. After the treatment the reduction was 95% (Figures 17 and 18). The use of LED Therapy is completely painless and leaves no sequel. The Figures 19 and 20 show the results of treatment.

**Figure 15.** Patient with stretch marks on breasts before application of therapy.

**Figure 16.** Patient developed stretch marks after placing silicone breast.

**Figure 17.** Application of therapy with LEDs that emit blue and red lights.

**Figure 18.** Application of the array of LEDs during treatment.

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**Figure 19.** Result after treatment.

**Figure 16.** Patient developed stretch marks after placing silicone breast.

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**Figure 17.** Application of therapy with LEDs that emit blue and red lights.

**Figure 18.** Application of the array of LEDs during treatment.

**Figure 20.** The striations were eliminated.

The second case is a patient who had stretch marks on her hip in the region of the buttocks. She underwent a medical evaluation and the treatment was initiated. 20 sessions were held for 49 days. Each session was 40 minutes long. A reduction of 87% of the hips as shown in Figure 21 has occurred.

In this procedure the Buck converter, which is supplied by the LEDs, was used that emit red and blue light.

All patients who underwent treatment fulfilled all requirements and recommendations of the medical staff. All International Laws and National research in human beings were observed. All protocols required by the Brazilian Ministry of Health and the Ethics Committees of Hospital Institutions.

**Figure 21.** Outcome of treatment for stretch marks.

The Figure 22 shows some prototypes that were manufactured to perform the therapy.

**Figure 22.** Prototypes that are being manufactured.
