uso de esteroides sistémicos en quemaduras de segundo grado en modelo animal systemic steroid use in second degree burns in an animal model
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Abstract
The use of steroids is well recognized in critical care specially in septic shock. There are some reports of their utility in severe burns. It helps to regulate the hemodynamic response in order to improve the blood supply to the skin, although it is well known their negative effect in wound healing. Our objective is to know the hystopathologic effect of steroids in burn healing. We used 2 groups of 10 rats (Wistar). Both groups were exposed in their backs to a metallic cylinder at 95 ºC for 15 seconds. At the moment of the burn, one group was given steroid (hydrocortisone at stress dose 5 mg/kg) and the other group didn't received any medication. The scar was removed at the 5th day and the burn injury was covered with queratinocyte culture. The rats were sacrificed at 14th day. We evaluated the presence of clinical signs of infection and the percentage of new epithelium. In the microscope we evaluated the following parameters: fibrosis, inflammatory process, presence of fibroblast and vascular proliferation. We compared both groups using Chi² test (SPSS program version 10). A p =/<. 05 was considered as statistical significant. We found no difference between each group in fibrosis (p .47), inflammatory process (p .27), or fibroblast presence (p.16). But there was a difference in vascular proliferation (p .05) against the first group (steroid group). There were no signs of infection and all of them were epithelised at the 14th day. In conclusion, the use of steroids in burns in an animal model could have a final effect in wound healing. In humans it is important to say that they can be helpful in those cases with clear evidence of benefit, as for example failure to vassopresor response in septic shock. We are not sure about the final effect in wound healing in the steroid group as for example wound contracture in long term.
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ramos-gallardo2012cirugauso
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| Authors | ;G. Ramos-Gallardo;A.R. Ambriz Plascencia;D. Medina Preciado;E. Portilla de Buen;R. Rodríguez Madrigal;F. Ochoa;L. González Reynoso;M.A. Rendón Medina;A. Miranda-Altamirano |
| Journal | Microbiology (Reading, England) |
| Year | 2012 |
| DOI |
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