| Background: The application time of therapeutic ultrasound is an infrequently studied dosimetric variable that affects tissue repair. Objectives: The aim of this study was to evaluate the effects of different treatment times of therapeutic ultrasound (US) on the organization of collagen fibers in the tendons of rats. Method: Forty Wistar rats were selected (300±45 g), and the rats were divided into five groups (n=8 for each group): Control, without tenotomy or any treatment; tenotomy group, with tenotomy and without treatment; US groups (US1, US2, and US3), subjected to tenotomy and treated with US for one, two, or three minutes per area of the transducer, respectively. The animals were sacrificed on the 12th post-operative day, and the tendons were surgically removed for analyses of the collagen fiber organization by means of birefringence analysis. Results: The collagen fibers exhibited better aggregation and organization in the US3 group compared with the tenotomy group (p<0.05). Conclusions: The findings suggest that US applied for three minutes per treated area improves the organization of collagen fibers during rat tendon repair.Keywords: therapeutic ultrasound; Achilles tendon; physical therapy; collagen; wound healing. HOW TO CITE THIS ARTICLE
Este estudo teve como objetivo realizar uma revisão da literatura sobre os parâmetros de aplicação do ultrassom terapêutico no reparo tecidual do sistema musculoesquelético. Foi realizado um levantamento de dados sobre essa temática nas seguintes bases de dados: MEDLINE, LILACS e SciELO, em línguas portuguesa, inglesa e espanhola, sendo considerados apenas ensaios experimentais realizados em animais, publicados a partir de 2.000 e pesquisados até janeiro de 2.012. Foram encontrados 16 artigos sobre a utilização do ultrassom terapêutico no reparo tecidual, dos quais nove abordaram a lesão tendínea, quatro sobre reparo ósseo, dois verificaram o efeito na lesão muscular e um na lesão nervosa. Os achados desta revisão de literatura sobre as evidências científicas dos efeitos do ultrassom terapêutico no sistema musculoesquelético sugerem que não há padronização quanto à dosimetria adequada para o reparo tecidual deste, pois os artigos disponíveis são insuficientes para comprovar os seus reais efeitos e determinar os parâmetros indicados para este tipo de tratamento.
Background:Physiotherapy in the plastic surgery post-operative (PO) is essential to provide means for an adequate and fast recovery as it restores function through the use of physiotherapeutic procedures.Aim:The aim of the following study is to verify the effects of the association between the manual lymphatic drainage and the therapeutic ultrasound on pain, oedema and the tissue fibrosis in liposuction and lipoabdominoplasty PO.Design:This is a clinical trial prospective.Materials and Methods:Eighteen women aged between 18 and 60 years participated in this study, in the late PO period following lipoabdominoplasty or liposuction in the abdomen, flanks and lower trunk, which showed tissue fibrosis of the flanks and abdomen regions. They were divided into two groups: Liposuction group and lipoabdominoplasty group. A total of twelve sessions of therapeutic ultrasound followed by the manual lymphatic drainage were performed. The patients were assessed with regard to pain, oedema and tissue fibrosis in different moments: Initial assessment, during assessment and final assessment through the application of the protocol of evaluation of cysts fibrosis levels.Statistical Analysis:The test of equality for two proportions and the confidence interval test for mean to evaluate the distribution of variables. The significance level adopted for statistical tests was 5% (P < 0.05).Results:There was a statistically significant reduction of pain, swelling and tissue fibrosis in both groups.Conclusion:the association between manual lymphatic drainage and the therapeutic ultrasound reduced the swelling and the tissue fibrosis and made pain disappear in liposuction and lipoabdominoplasty PO period.
The aim of this study was to evaluate the organization of collagen fibers in the healing process of rat Achilles tendon rupture using different times of ultrasound therapy (TUS). Forty Wistar rats were selected. Among these, 32 were submitted to total and divided into 5 groups: control group (CG, = 8), without tenotomy or any treatment; tenotomy group ( = 8), with tenotomy and without treatment; TUS groups-TUS3 ( = 8), TUS4 ( = 8), and TUS5 ( = 8)-submitted to tenotomy and treated with TUS for 3, 4, and 5 min per effective radiating area (ERA), respectively. The animals were sacrificed on the 12th postoperative day. The tendons were surgically removed for analysis of the collagen fiber organization using the birefringence technique (OR, optical retardation). The collagen fibers exhibited better aggregation and organization in the UST3, TUS4, and TUS5 groups compared with CG ( < 0.05). The TUS5 group had rates in intergroup comparison. The dose response of therapeutic TUS is influenced by many variables. The scientific evidence to support the dosimetry is insufficient. The application time is an important variable to be considered in TUS. In this study, the longer the application time, the better for organization and aggregation of collagen fibers in the rat tendon. TUS applied for 5 min per ERA presented higher dose response to the organization of collagen fibers in the healing process of rat Achilles tendon rupture.
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