A utilização de coberturas oclusivas: a influência sobre a cicatrização de feridas excisionais em camundongos
| Ano de defesa: | 2018 |
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| Autor(a) principal: | |
| Orientador(a): | |
| Banca de defesa: | |
| Tipo de documento: | Dissertação |
| Tipo de acesso: | Acesso aberto |
| Idioma: | por |
| Instituição de defesa: |
Universidade Federal de Minas Gerais
UFMG |
| Programa de Pós-Graduação: |
Não Informado pela instituição
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| Departamento: |
Não Informado pela instituição
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| País: |
Não Informado pela instituição
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| Palavras-chave em Português: | |
| Link de acesso: | http://hdl.handle.net/1843/BUOS-B2ZMBU |
Resumo: | INTRODUCTION: The care of the wounded patient is a constant challenge in the nurse's clinical practice. Occlusive and non-occlusive coverages are used to treat wounds and there is a lack of knowledge about the impact of these indications on the healing process. OBJECTIVE: The objective of the present study was to evaluate the influence of occlusive coatings on the cicatrization of cutaneous excisional wounds in C57BL / 6 mice. MATERIALS AND METHODS: It is a pre-clinical, comparative and controlled translational study. The mice were divided into three experimental groups and the treatment of excisional wounds of these were classified as: animals that received occlusion with hydrocolloid (HD), animals that received occlusion with transparent polyurethane film (FT) and animals without occlusion (SO). The groups were evaluated for: wound closure rate, neutrophil and macrophage infiltration, TNF- cytokine dosing, VEGF angiogenic growth factor, HIF-1 protein expression and, histologically, the development of new blood vessels. Wound scars were analyzed by independent judges regarding the aesthetic presentation on the fourteenth day of the segment. RESULTS: On the third day of the healing process it was possible to observe, macroscopically, that the closure of excisional skin wounds was accelerated in animals whose wound was occluded using both transparent and hydrocolloid films. Also, in the three-day period, there was a decrease in TNF- proinflammatory cytokine levels in the hydrocolloid occluded wounds when compared to the SO and FT groups. Neutrophil accumulation also significantly decreased on the third day of healing in the group treated with hydrocolloid occlusion when compared to the SO and FT groups, respectively. Macrophage content had significantly higher levels, on day 3, in the FT group, when compared to OS. On the sixth day of the study, significantly increased dosages of macrophages were detected in the HD group, contrasting with the SO and FT groups. VEGF levels were expressively increased on the sixth day of healing in animals whose wound was occluded with transparent polyurethane film and hydrocolloid film. There was an increase in levels of the factor inducing 1-alpha hypoxia in the animals submitted to occlusion when compared to those without occlusion. The qualitative analysis of the wound healing repair allowed to affirm that there was moderate and significant agreement, between the judges, in the HD group and substantial and significant concordance in the scars of the SO animals. FINAL CONSIDERATIONS: Considering that the inflammatory response is a fundamental immunological process for the wound repair process, when it occurs in a controlled way, it is suggested that the occlusion modulates the inflammatory response. Such a finding is evidenced by partial inhibition of the proinflammatory cytokine TNF-, reduction of neutrophil accumulation, and higher levels of macrophages. The wounds occlusion did not show a quantitative increase of capillary vessels in relation to the group without occlusion |