Abstract
INTRODUÇÃO: Avaliamos os efeitos do ultra-som terapêutico (UST), adicionado ou não à imobilização gessada (IG), como forma de tratamento à lesão muscular por impacto analisando as propriedades mecânicas de alongamento e carga nos limites de proporcionalidade e máximo, rigidez (R) e resiliência do músculo gastrocnêmio. METODOLOGIA: Utilizamos 70 ratas divididas em 7 grupos:Grupo 1-Controle;Grupo 2-Sem tratamento,Grupo 3-IG por 24 horas;Grupo 4-IG por 72 horas; Grupo 5-UST sem presença de IG;Grupo 6-IG por 24 horas associada ao UST;Grupo 7-IG por 72 horas associada ao UST. RESULTADOS: As propriedades de carga no limite de proporcionalidade e carga máxima mostraram que o grupo estimulado com o UST comportou-se de modo semelhante ao grupo controle. A propriedade de alongamento no limite de proporcionalidade não diferenciou os grupos; o alongamento máximo do grupo estimulado com (UST) e dos grupos imobilizados por 72 horas foram comparáveis ao grupo controle. CONCLUSÃO: O grupo estimulado (UST) apresentou rigidez similar ao grupo controle e resiliência superior a todos os grupos. A utilização isolada do UST forneceu resultados similares àqueles considerados como normais, o mesmo não sendo observado quando o UST foi associado à IG.
Highlights
Different therapeutic alternatives are being suggested targeting the full recovery of patients with muscle injuries within the shortest possible time, providing them back with a normal functional physical status and allowing a better physical performance.[1]
Our objective was to assess the influence of therapeutic ultrasound (TUS), added by plastered immobilization or not, after immediate trauma, on the process of muscle repair by assessing the mechanical properties of muscular fibers of gastrocnemius muscle
The results found for each specimen were summed and the arithmetic mean values and standard deviations were calculated by using a Microsoft Excel 2000 application for each experimental group
Summary
Different therapeutic alternatives are being suggested targeting the full recovery of patients with muscle injuries within the shortest possible time, providing them back with a normal functional physical status and allowing a better physical performance.[1]. Heckmann and Francis[4] used different therapeutic ultrasound powers for the histochemical evaluation of its effects for the repair process of blunt muscle injuries, regarding it as beneficial. Rantanen et al.[5] concluded that therapeutic ultrasound accelerates muscle repair after contusion promoting significant proliferation of satellite cells to the injury site. Menezes et al.[6] applied therapeutic ultrasound in an experimental muscle injury model by smashing, acquired their results by means of mechanical assays and concluded that it seems to have an improvement of the injury repair quality. We didn’t find in literature studies correlating the effects of therapeutic ultrasound with plastered immobilization on muscle repair and the corresponding mechanical properties. Our objective was to assess the influence of TUS, added by plastered immobilization or not, after immediate trauma, on the process of muscle repair by assessing the mechanical properties of muscular fibers of gastrocnemius muscle
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