laser de baixa intensidade (830 nm) na recuperação funcional do nervo isquiático de ratos low intensity laser (830 nm) functional to recover of the sciatic nerve in rats

Clicks: 286
ID: 176983
2010
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Abstract
OBJETIVO: Avaliar o efeito do laser de baixa intensidade na melhora funcional da marcha de ratos após esmagamento do nervo ciático. MÉTODOS: Foram utilizados 18 ratos divididos alea-to-riamente em dois grupos: controle (sham) e irradiado com densidade de energia de 40J/cm², em 21 dias consecutivos, utilizando o laser 830nm (AsGaAl). Os animais foram submetidos ao esmagamento do nervo ciático direito com o dispositivo portátil de peso morto e avaliados pelo "Índice Funcional do Ciático" (IFC). As pegadas foram coletadas no pré-operatório, 7º, 14º e 21º dias pós-operatório. RESULTADOS: Os resultados do IFC foram significantes quando comparados os grupos no 7º e 14º dia pós-operatório (p<0,05). No 21º dia pós-operatório não houve diferença entre os grupos. Na avaliação intra-grupos houve diferença entre todas as semanas avaliadas (p<0,01). Os animais irradiados apresentaram melhora no padrão da marcha, demonstrada pelos valores do IFC nos períodos iniciais, mas ao final das 3 semanas, houve uma recuperação similar. CONCLUSÃO: A laserterapia de baixa intensidade mostrou ser eficaz no estímulo da aceleração da regeneração nervosa do ciático de ratos após esmagamento.
OBJECTIVE: This study aimed to evaluate the effect of low-intensity laser on functional improvement of the walking of rats after sciatic nerve axonotmesis. METHODS: We used 18 rats divided randomly in two groups: control (Sham) and irradiated with an energy density of 40J/cm² for 21 consecutive days, using 830nm laser (AsGaAl). The animals were subjected to right sciatic nerve crushing by a portable device and assessed by the "Sciatic Functional Index" (SFI) at an acrylic platform through video recorded by a digital camera. The footprints were collected preoperatively, and on the 7th, 14th and 21st postoperative days. RESULTS: The results of the SFI were significant when comparing the groups on the 7th and 14th postoperative day (p<0.05). On the 21st postoperative day there was no difference between groups. There were intra-group differences detected in each evaluated week (p<0.01). The irradiated animals showed improvement in motion pattern, shown by the SFI values in the initial periods, but after 3 weeks, there was a similar recovery. CONCLUSION: The low-intensity laser has shown to be effective in accelerating regeneration of the sciatic nerve of rats after crushing.
Reference Key
marcolino2010actalaser Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Alexandre Marcio Marcolino;Rafael Inacio Barbosa;Lais Mara Siqueira das Neves;Thomas Selvaggio Vinas;Danilo Teixeira de Barros Duarte;Nilton Mazzer;Marisa de Cássia Registro Fonseca
Journal current opinion in food science
Year 2010
DOI
10.1590/S1413-78522010000400007
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-78522010000400007
Keywords
crush syndrome sciatic nerve laser therapy

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