RESUMOO objetivo deste estudo foi avaliar o efeito do tratamento da superfície de lentes intraoculares acrílicas utilizando-se plasma de flúor ou polietilenoglicol na prevenção da opacidade de cápsula posterior. Foram analisados 40 olhos de coelhos, submetidos à cirurgia de facoemulsificação e distribuídos em quatro grupos experimentais (n=10), sendo estes: grupo controle, coelhos sem implante de lente intraocular; grupo com lente intraocular tratada com plasma de polietilenoglicol; grupo com lente intraocular tratada com plasma de flúor; e grupo com lente intraocular comercial. As cápsulas posteriores das lentes dos grupos foram avaliadas por meio de análise histopatológica (morfometria e imuno-histoquímica). Os grupos com lente intraocular tratada com polietilenoglicol e com lente intraocular comercial apresentaram menor espessura da cápsula posterior na avaliação inicial (12 semanas) em relação ao grupo controle. No período final de avaliação (6 meses), os tratamentos da superfície da lente intraocular à base de plasma de flúor e polietilenoglicol não reduziram o desenvolvimento das alterações histológicas associadas à opacidade de cápsula posterior. O tratamento das superfícies das lentes intraoculares com plasma de flúor e polietilenoglicol pode ser realizado como adjuvante na prevenção da opacidade de cápsula posterior, pois não causa alterações na morfologia da lente após facoemulsificação.

ABSTRACTThe aim of this study was to evaluate the effect of surface treatment of acrylic intraocular lens using Fluorine plasma or polyethylene glycol in the prevention of posterior capsule opacification. Forty rabbit eyes that underwent phacoemulsification were analyzed and distributed into four experimental groups (n=10): Control group, composed of rabbits without intraocular lens implantation; intraocular lens group treated with Polyethylene glycol plasma, intraocular lens group treated with Fluoride plasma, and commercial intraocular lens group. The posterior capsule of the lens was evaluated by histopathological analysis, including morphometric and immunohistochemical studies. Groups with intraocular lens treated with polyethylene glycol and commercial intraocular lens presented thinner posterior capsule at initial assessment (12 weeks) compared to the control group. At the end of the evaluation (six months), the treatment of surface intraocular lens with fluorine and polyethylene glycol plasma did not reduce the development of histological changes associated with posterior capsule opacification. The surface treatment of the intraocular lens with Fluoride and Polyethylene glycol can be performed as an adjuvant in preventing posterior capsule opacification, because it does not cause changes in the morphology of lens after phacoemulsification surgery.

Este trabalho teve por objetivo avaliar, clínica e macroscopicamente, o tratamento adjuvante com plasma rico em plaquetas na forma de colírio ou tampão, em úlceras de córnea de cães atendidos no Serviço de Oftalmologia Veterinária. Foram analisados 20 olhos com diagnóstico de ceratite ulcerativa, distribuídos em dois grupos experimentais. O grupo colírio (GC) foi constituído por olhos tratados topicamente com colírio autólogo de plasma rico em plaquetas (PRP), e o grupo tampão (GT) por olhos submetidos ao tratamento à base de tampão sólido de PRP, associado ao recobrimento com terceira pálpebra para retenção deste. Os grupos foram avaliados, por meio de avaliação clínica, macroscópica e análise da redução do defeito epitelial, em diferentes momentos, aos três, cinco, dez, 15 e 30 dias, com exceção do terceiro dia no GT. O recobrimento da terceira pálpebra foi removido no quinto dia no GT. Em ambos os grupos, houve redução dos sinais de inflamação, melhora na sensibilidade ocular e adequada reparação do defeito epitelial. Todos os olhos do GT apresentaram completa cicatrização no quinto dia e 70% no GC, atingindo a totalidade no 10º dia. O PRP na forma de colírio ou tampão é uma excelente terapia adjuvante a ser instituída no tratamento clínico da úlcera de córnea em cães, pois atua na diminuição dos sinais inflamatórios, da dor ocular e auxilia potencialmente na cicatrização do defeito epitelial.

This study aims to clinically and macroscopically evaluate the adjuvant therapy with platelet-rich plasma in the form of eyedrops or clot, for corneal ulcers in dogs treated at the Veterinary Ophthalmology Service. We analyzed 20 eyes diagnosed with ulcerative keratitis, divided into two experimental groups. The eyedrop group (GC) was composed of eyes treated topically with eyedrops of autologous platelet-rich plasma (PRP), and the clot group (GT) was composed of eyes treated with a platelet-rich clot and covered with a third eyelid for retention of the clot. The groups were evaluated by clinical and macroscopic analysis and by the analysis of epithelial defect reduction, at different times, at three, five, ten, 15 and 30 days, except for the third day in GT. The coverage of the third eyelid was removed on the fifth day. In both groups the inflammation signs reduced, there was an improvement in ocular sensibility and proper repair of epithelial defect. All GT eyes and 70% GC eyes showed complete healing on the fifth day, the remainder of GC completed healing on the tenth day. PRP in the form of eyedrops and clot is an excellent adjuvant therapy to be instituted in the clinical treatment for corneal ulcer in dogs, because it decreases the inflammatory signs and the ocular pain and it potentially assists in healing epithelial defects.

Fibrin glue has been researched as an alternative method for tissue synthesis and is known for its capability to promote hemostasis at the application site, good approximation of wound edges and fast healing. The current study consisted in the application of fibrin glue derived from snake venom as treatment for experimental corneal ulcers. Twenty-one dogs had their corneas experimentally prepared through lamellar keratectomy (of standardized diameter and depth). Animals were divided into seven groups of three animals each. Six experimental groups were periodically evaluated and collection was carried out on the 1st, 3rd, 7th, 15th, 30th and 60th post-operative days, whereas one control group was evaluated throughout the experiment. Analyses consisted in the clinical evolution and in the histopathological study of all operated on eyes. Results indicated that fibrin glue was efficient in repairing keratectomy wounds in dogs and contributed to an earlier healing phenomenon, avoiding edema formation and keeping corneal clearness. The use of fibrin glue derived from snake venom showed to be easy to apply, feasible with animal models and of low cost, avoiding the lesion progress and allowing fast and appropriate corneal healing.