Detalhes bibliográficos
| Ano de defesa: |
2015 |
| Autor(a) principal: |
Costa, Flávia Resende Martins da
 |
| Orientador(a): |
Araújo, Eugênio Gonçalves de
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| Banca de defesa: |
Araújo, Eugênio Gonçalves,
Carneiro, Jussara de Souza,
Jacomini, José Octavio,
Martins, Danieli Brolo,
Santin, Ana Paula Iglesias |
| Tipo de documento: |
Tese
|
| Tipo de acesso: |
Acesso aberto |
| Idioma: |
por |
| Instituição de defesa: |
Universidade Federal de Goiás
|
| Programa de Pós-Graduação: |
Programa de Pós-graduação em Ciência Animal (EVZ)
|
| Departamento: |
Escola de Veterinária e Zootecnia - EVZ (RG)
|
| País: |
Brasil
|
| Palavras-chave em Português: |
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| Palavras-chave em Inglês: |
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| Área do conhecimento CNPq: |
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| Link de acesso: |
http://repositorio.bc.ufg.br/tede/handle/tede/5679
|
Resumo: |
Chitosan is a polysaccharide amino derivative of chitin, and constitutes most of the insects and crustaceans exoskeletons and fungal cell wall, thus being a low-cost, renewable and abundant, biodegradable natural product. Biological characteristics, biocompatibility and biodegradability allows various uses of this biomaterial in healthcare. The present study aimed to evaluate the hemostatic contact effect and tissue response to the implant of chitosan-alginate sponge in hepatic lesion in Swiss mice, comparing to freeze-dried hydrolyzed collagen sponges. The lesions were surgically induced. The hemostatic contact effects of chitosan and hydrolyzed collagen sponges were evaluated through its mechanical compression on hemorrhagic lesions, while the effects of his implants were observed from the incorporation of fragments of those sponges in liver failures. Gauze sponges were used as control for contact study. For the implants evaluation, liver segments removed to produce hepatic injury were used as controls. Average hemostasis times for chitosan and collagen treatments were 49 seconds, and one minute and 28 seconds for gauze treatments. Grossly, omental adhesions were observed on the implants and faster integration of collagen sponge at receiver tissue. Microscopic evaluation showed inflammatory reaction to both implanted materials and collagen synthesis stimulation. Average percentage of collagen from hepatic recipients segments of the chitosan-alginate sponge implant, and collagen hydrolyzate sponge implant increased significantly between 7 and 14 days postoperatively, pointing to a stimulating effect exerted by chitosan sponges for tissue repair. In conclusion, chitosan sponges have hemostatic action and stimulating effect on the synthesis of hepatic collagen fibers. |
