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1.
Acta ortop. bras ; 11(2): 110-117, abr.-jun. 2003. ilus, tab
Article in Portuguese | LILACS | ID: lil-336090

ABSTRACT

A fibrose pós laminectomia em cirurgia da coluna vertebral tem sido responsabilizada por um grande percentual das falhas nestas cirurgias, tanto a curto quanto a longo prazo. Muitos dos pacientes desenvolvem sintomas de dor crônica ou recorrente após tratamento cirúrgico de hérnias de disco, estenose de canal,etc. Apesar de ainda existirem dúvidas quanto à fisiopatologia do problema, sabe-se que a fibrose interfere na mobilidade normal das raízes e da medula espinal, fator este responsabilizado como o principal na gênese das falhas cirúrgicas. Para se evitar a fibrose pós-cirúrgica, vários materiais de interposição entre a musculatura posterior da coluna e a dura-máter foram estudados, sem grandes resultados. Neste trabalho foi feito estudo da membrana de politetrafluoroetileno inerte expandido (Preclude Spinal Membrane°) comparando-se a mesma com grupo controle para a prevenção da fibrose pós laminectomia. Observou-se que a técnica cirúrgica apurada parece ser fator importante na prevenção da formação de tecido cicatricial abundante e que a membrana de politetrafluoroetileno inerte expandido mostrou ser material inerte.


Subject(s)
Animals , Rats , Fibrosis , Laminectomy , Polytetrafluoroethylene , Rats, Wistar
2.
Rev. Hosp. Clin. Fac. Med. Univ. Säo Paulo ; 57(6): 257-264, Nov.-Dec. 2002. ilus, tab
Article in English | LILACS | ID: lil-336458

ABSTRACT

INTRODUCTION: Traumatic spinal cord injury is one of the most disabling conditions occurring in man and thus stimulates a strong interest in its histopathological, biochemical, and functional changes, primarily as we search for preventive and therapeutic methods. PURPOSE: To develop an experimental model for transplantation of cells from the fetal rat central nervous system to the site of an injured spinal cord of an adult rat in which the transplanted cells survive and become integrated. This experimental model will facilitate investigations of factors that promote regeneration and functional recovery after spinal cord trauma. MATERIAL AND METHODS: Fifteen adult Wistar rats underwent laminectomy, and an spinal cord lesion was made with microdissection. Fetal spinal cord tissue was then transplanted to the site of the injury. The rats were monitored over a 48-hour period, and then their vertebral column was completely removed for histological analysis. RESULTS: In 60 percent of transplanted rats, the fetal tissue at the injured site remained viable in the site of the lesion


Subject(s)
Animals , Male , Female , Rats , Fetal Tissue Transplantation , Spinal Cord , Spinal Cord Injuries , Stem Cell Transplantation , Disease Models, Animal , Nerve Tissue , Rats, Wistar , Spinal Cord
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