Resumo O plasma rico em plaquetas autólogo é importante no processo cicatricial de cirurgias reconstrutivas, auxiliando na estimulação da angiogênese; no entanto, o plasma heterólogo mostrou-se mais eficaz. Utilizou-se 24 coelhos da raça Nova Zelândia, com idade de 12 meses, com peso corporal cerca de 3,0 kg. Os animais foram separados em quatro grupos de igual número e submetidos a remoção de pele na linha média dorsal torácica (ferida tratada) e lombar (ferida controle). Nas tratadas, foi aplicado plasma rico em plaqueta de equino e pomada contendo gentamicina, sulfanilamida, sulfadiazina, ureia e vitamina A e, nas do grupo controle, somente a pomada. Nos do grupo I, foi coletado tecido cutâneo para a avaliação histológica com três dias de pós-operatório, nos do grupo II com sete dias, nos do grupo III com 14 dias e, nos do grupo IV, com 21 dias. Decorrido o período de avaliação de cada grupo, foi coletado fragmento de pele para avaliação histológica. O uso associado do plasma rico em plaquetas heterólogo de equino com a pomada contendo gentamicina, sulfanilamida, sulfadiazina, ureia e vitamina A, em feridas de pele induzidas cirurgicamente acelera o processo cicatricial.

Abstract Autologous platelet-rich plasma (PRP) is beneficial in the healing process of reconstructive surgeries, contributing to the stimulation of angiogenesis; however, heterologous plasma has been shown to be more effective. The objective of this study was to verify, by macro- and microscopic evaluation, whether PRP accelerates the healing process as compared to a commercial ointment containing gentamicin, sulfanilamide, sulfadiazine, urea, and vitamin A (study ointment). This study used 24 white New Zealand rabbits, aged 12 months, and each weighing approximately 3 kg. The animals were separated into 4 equal groups and underwent wound induction through skin removal in the thoracic (study wound) and lumbar (control wound) dorsal midline. Study wounds were co-treated with equine PRP and the study ointment. Control wounds were treated with only the study ointment. Group I underwent histological evaluation 3 days after the skin removal procedure, group II after 7 days, group III after 14 days, and group IV after 21 days. A skin fragment was collected from each animal for histological evaluation. The co-treatment with heterologous equine PRP and the study ointment accelerated the healing process in the surgically induced skin wounds, confirming the acceleratory effect of PRP on wound healing.