comparative study between polypropylene and polypropylene/poliglecaprone meshes used in the correction of abdominal wall defect in rats estudo comparativo entre as telas de polipropileno e polipropileno/poliglecaprone utilizadas na correção de defeito na parede abdominal ventral de ratos

Clicks: 320
ID: 180388
2012
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Abstract
PURPOSE: To evaluate the healing process of a defect in the ventral abdominal wall of rats, comparing the polypropylene and polypropylene/poliglecaprone meshes on the 30th and 60th postoperative day. METHODS: Thirty two Wistar rats were submitted to a ventral abdominal wall defect, with integrity of the parietal peritoneum. In the repair, were used polypropylene (group A) and polypropylene/poliglecaprone (group B) meshes. The groups were subdivided into four subgroups of eight animals euthanized on the 30th (A30 and B30) and 60th postoperative day (A60 and B60). Fragments of the abdominal wall of the animals were submitted to macroscopic, tensiometric and histological evaluations. RESULTS: The tensiometry on subgroup A30 showed a mean average break point of 0.78 MPa and in A60, 0.66 Mpa. In subgroup B30 it was 0.84 MPa and in B60, 1.27 Mpa. The score of the inflammatory process showed subacute phase on A30 and B30 sub-groups and chronic inflammatory process in subgroups A30 and 60B. CONCLUSIONS: The tensile strength was higher on the wall repaired by polypropylene/poliglecaprone mesh in the 60th post-operative day. Histology showed higher concentration of fibrosis on the surface of the polypropylene mesh with a tendency to encapsulation. In polypropylene/poliglecaprone subgroups the histology showed higher concentration of fibrosis on the surface of mesh filaments.
OBJETIVO: Avaliar a cicatrização de um defeito, na parede abdominal ventral de ratos, comparando-se as telas de polipropileno e polipropileno/poliglecaprone no 30º e 60º dia do pós-operatório. MÉTODOS: Trinta e dois ratos Wistar foram submetidos à produção de defeito na parede abdominal ventral, com integridade do peritônio parietal. Na correção foram utilizadas as telas de polipropileno (grupo A) e polipropileno/poliglecaprone (grupo B). Houve subdivisão em quatro subgrupos (A30, A60, B30 e B60) de oito animais que foram submetidos à eutanásia no 30º e 60º dia do pós-operatório. Fragmentos da parede abdominal foram submetidos à análise macroscópica, tensiométrica e histológica. RESULTADOS: A tensiometria no subgrupo A30 mostrou tensão média de ruptura de 0,78 Mpa e no subgrupo A60 de 0,66 MPa. No subgrupo B30 foi de 0,84 MPa e no B60 de 1,27 MPa. O escore do processo inflamatório mostrou fase subaguda nos subgrupos A30 e B30 e processo inflamatório crônico no subgrupo A60 e B60. CONCLUSÕES: A resistência à tensão foi maior na parede reparada pela tela de polipropileno/poliglecaprone no 60º dia pós-operatório. Na análise histológica houve maior concentração da fibrose na superfície da tela de polipropileno com tendência ao encapsulamento. Nos subgrupos polipropileno/poliglecaprone a análise histológica mostrou maior fibrose entre os filamentos da tela.
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Authors ;Carlos Alberto Lima Utrabo;Nicolau Gregori Czeczko;Cesar Roberto Busato;Mario Rodrigues Montemor-Netto;Osvaldo Malafaia;Ulrich Andreas Dietz
Journal forensic science international
Year 2012
DOI
10.1590/S0102-86502012000400004
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-86502012000400004
Keywords
hernia ratssurgery

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