Introdução. A fotoepilação usa diferentes fontes de luz para remover pelos indesejáveis. As fontes de luz mais comuns usadas para depilação permanente são os lasers de diodo e a luz pulsada intensa. A depilação com luz assistida baseia-se na destruição da unidade folicular. A capacidade de remover pelos sem danificar a pele ao redor é baseada na fototermólise seletiva, no entanto, a ocorrência de efeitos colaterais como dor e queimação na pele é relatada para lasers e luz intensa pulsada. Objetivo. Aqui nós investigamos em um estudo piloto de uma tecnologia recentemente aprovada de LED de alta potência com sonda resfriada, possíveis mudanças na temperatura da pele avaliadas por termografia infravermelha, bem como sensibilidade aguda e 24h e dor por Escala Visual Analógica. Métodos. Cinco participantes sem restrições de fototipo de pele foram incluídos no estudo piloto. A temperatura da pele foi monitorada antes e depois (30s, 5 e 10 min) após a fotoepilação com LED, além de dor instantânea e 24h. Resultados. Nem aumentos significativos na temperatura da pele e nenhuma dor 24 horas ou quaisquer efeitos colaterais foram relatados. A dor aguda durante o procedimento variou de 2 a 4 (VAS). Conclusão. LED de alta potência com sonda resfriada parece ser uma tecnologia segura e eficiente para fotoepilação.
Background: Devices that use light, especially lasers, have become popular and are commonly used in aesthetics and hair removal. Laser-assisted photo epilation was originally described in 1996 and the proposed mechanism is based on the destruction of the follicular unit. Diode laser has been demonstrated to be an effective method for hair removal, however, the safety of patients with different skin types and colours is questionable due to thermal damage as the main side-effect. In this sense, the technological innovation of Photoepilation using high power LED equipment with high head cooling efficiency represents a great advance for the area. In this work, we evaluated the results of photoepilation using high-power LED in 117 patients with phototypes 01 to 06. Methods: A High potency LED equipment (Holoniak® – Adoxy Equipments – Brazil) was used. The LED allows the therapist to customize illumination parameters according to the sensitivity of the patients. All 117 participants were submitted to an initial sensitivity test to the LED irradiation, in order to determine adequate parameters to each participant. Sensitivity test was performed in both stationary and scanning modes. In scanning mode the test started with the following parameters – temperature of the at 10oC, fluence of 5 J/Cm2 and frequency 2 – 3 Hz. In stationary mode the sensitivity test started with temperature of the probe at 10 oC, fluence of 10 J/Cm2 and frequency of 0.8 Hz. No phototype restrictions were applied. To analyze the satisfaction of results, we created an arbitrary scale ranging from 1 to 4, where Grade 1 was considered unsatisfactory, Grade 2 - little satisfactory, Grade 3 - satisfactory and Grade 4 - very satisfactory. We also analyzed the number of sessions needed to achieve the hair removal result for each skin phototype. Results: Analyzing the percentage of satisfaction after LED photoepilation, satisfaction grade 3 and 4 represent approximately 95% of the participants. Surprisingly, there was no statistical correlation between the increase in skin phototype and the number of sessions needed to achieve the complete photoepilation effect. Unlike laser technology, which usually requires a high number of sessions for higher phototypes. No correlation with age was also reported. Conclusion: We can conclude that high power LED technology with effective tip cooling was able to achieve highly efficient results for 95.7% of treated patients, without the need to increase the number of sessions for phototypes 4 to 6.
The increased interest and concern with physical fitness, not only from an athletic point of view, but also from an aesthetic point of view, has driven the search for new methods and technologies capable of helping to gain mass and muscle tone. Recent studies show that 81% percent of respondents reported dissatisfaction with their body image, even with 56% having a normal body mass index. Pulsed electromagnetic field (PEMF) muscle stimulation technology uses alternating magnetic fields based on the law of electromagnetic induction to promote supramaximal muscle contractions. PEMF generates impulses that are independent of brain function, and with such a fast frequency that it does not allow the muscle relaxation phase, characterizing tetanic contractions. Electric currents and electromagnetism have been used in physical therapy and rehabilitation, especially for muscle strengthening. However, the PEMF technology has emerged as a more efficient and comfortable alternative for the patient, with the primary objective of toning and strengthening muscle groups. In this work, we performed a literature review of all scientific articles available and indexed in Pubmed and Web of Science about this technology in the last 20 years and its effects on skeletal muscles. We discuss the scientific evidence available from clinical studies and discuss effects and possible mechanisms of action on muscle contraction.
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