Terapia a Laser de baixa intensidade e diodo emissor de luz na viabilidade de retalho cutâneo randômico em ratos

• Ano de defesa: 2010
• Autor(a) principal: Nishioka, Michele Akemi [UNIFESP]
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de São Paulo (UNIFESP)
• Palavras-chave em Português: Fototerapia; Mastócitos; Necrose; Ratos; Retalhos cirúrgicos; Vasos sanguíneos; Terapia a laser de baixa intensidade
• Link de acesso: http://repositorio.unifesp.br/handle/11600/10108

Introduction: The skin flap is a common surgical procedure in plastic surgery, is the main complication of necrosis formation. Thus, several studies have used low level laser therapy to increase flap survival. Currently, LEDs have been introduced as an alternative to laser light. Objective: To evaluate the effect of low level laser therapy and light emitting diode on the viability of random skin flap in rats. Materials and methods: We used 48 animals divided into four groups, in all animals was performed random skin flap (4x10cm): group 1 sham; group 2 laser radiation 660nm, with energy density 5J/cm2; group 3 radiation LED 630nm, 5J/cm2 and Group 4 laser radiation 660nm, 89J/cm2. The irradiation was performed after surgery and 4 days subsequent to a point 2.5 cm from the cranial base of the flap. On the 7th postoperative day was evaluated vascular density, mast cell numbers and percentage of necrotic area. Results: The percentage of necrosis was significantly lower in group 3 (14.08%) and group 4 (14.03%) than in group 1 (28.70%) and group 2 (22.7%) with p <0.05. Vascular density and mast cell numbers, only the animals in group 3 had increased significantly compared to group 1 (p <0.05). Conclusion: The low level laser therapy and light emitting diode with the same total energies were effective in increasing the viability of random skin flaps in rats.