Navegando por Palavras-chave "physical agents"

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    High voltage pulsed current in collagen realignment, synthesis, and angiogenesis after Achilles tendon partial rupture
    (Associacao Brasileira Pesquisa Pos-Graduacao Fisioterapia-Abrapg-Ft, 2016) Rampazo, Erika P. [UNIFESP]; Liebano, Richard E.; Pinfildi, Carlos Eduardo [UNIFESP]; Folha, Roberta A. C. [UNIFESP]; Ferreira, Lydia M. [UNIFESP]
    Objective: To verify the efficacy of high voltage pulsed current in collagen realignment and synthesis and in angiogenesis after the partial rupturing of the Achilles tendon in rats. Method: Forty male Wistar rats were randomized into four groups of 10 animals each: sham, cathodic stimulation, anodic stimulation, and alternating stimulation. Their Achilles tendons were submitted to direct trauma by a free-falling metal bar. Then, the treatment was administered for six consecutive days after the injury. In the simulation group, the electrodes were positioned on the animal, but the device remained off for 30 minutes. The other groups used a frequency of 120 pps, sensory threshold, and the corresponding polarity. On the seventh day, the tendons were removed and sent for histological slide preparation for birefringence and Picrosirius Red analysis and for blood vessel quantification. Results: No significant difference was observed among the groups regarding collagen realignment (types I or III collagen) or quantity of blood vessels. Conclusion: High voltage pulsed current for six consecutive days was not effective in collagen realignment, synthesis, or angiogenesis after the partial rupturing of the Achilles tendon in rats.
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    Low-Intensity Pulsed Ultrasound Accelerates Healing in Rat Calcaneus Tendon Injuries
    (J O S P T,, 2011-07-01) Jeremias Junior, Sergio Luiz; Camanho, Gilberto Luis [UNIFESP]; Bassit, Ana Cristina Ferreira; Forgas, Andrea; Ingham, Sheila Jean McNeill [UNIFESP]; Abdalla, Rene Jorge [UNIFESP]; Universidade de São Paulo (USP); Universidade Federal de São Paulo (UNIFESP)
    STUDY DESIGN: Controlled laboratory study.OBJECTIVE: To evaluate the effect of low-intensity therapeutic ultrasound on the murine calcaneus tendon healing process.BACKGROUND: Therapeutic ultrasound promotes formation and maturation of scar tissue.METHODS: Calcaneus tendon tenotomy and tenorrhaphy was performed on 28 Wistar rats. After the procedure, the animals were randomly divided into 2 groups. the animals in the experimental group received a 5-minute ultrasound application, once a day, at a frequency of 1 MHz, a spatial average temporal average intensity of 0.1 W/cm(2), and a spatial average intensity of 0.52 W/cm(2) at a 16-Hz frequency pulse mode (duty cycle, 20%). Data for the injured side were normalized in relation to the data from the contralateral healthy calcaneus tendon (relative values). the animals in the control group received sham treatment. After a 28-day treatment period, the animals were sacrificed and their tendons surgically removed and subjected to mechanical stress testing. the parameters analyzed were cross-sectional area (mm(2)), ultimate load (N), tensile strength (MPa), and energy absorption (mJ).RESULTS: A significant difference between groups was found for the relative values of ultimate load and tensile strength. the mean +/- SD ultimate load of the control group was -3.5% +/- 32.2% compared to 33.3% +/- 26.8% for the experimental group (P = .005). the mean tensile strength of the control group was -47.7% +/- 19.5% compared to -28.1% +/- 24.1% for the experimental group (P = .019). No significant difference was found in cross-sectional area and energy absorption.CONCLUSION: Low-intensity pulsed ultrasound produced by a conventional therapeutic ultrasound unit can positively influence the calcaneus tendon healing process in rats. J Ort hop Sports Phys Ther 2011;41(7):526-531, Epub 2 February 2011. doi:10.2519/jospt.2011.3468
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    Physical approach for prevention and treatment of osteoporosis
    (Sociedade Brasileira de Endocrinologia e Metabologia, 2010-03-01) Lirani-Galvão, Ana Paula Rebucci [UNIFESP]; Lazaretti-Castro, Marise [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
    Osteoporosis and its consequent fractures are a major problem in public health. To complement the conventional pharmacological treatment for this metabolic disease, non-pharmacological treatment options have been developed in the last decades. Several studies demonstrate that physical exercise programs including impact exercises, specific strength training, balance and coordination training may maintain or increase spine and hip bone mineral density as well as decrease the frequency of falls among osteoporotic and osteopenic patients. Furthermore, some physical agents such as vibratory platforms, low intensity electrical stimulation, laser therapy and ultrasound show positive effects on osteoporotic tissue as well. Consequently, while planning treatment for an osteoporotic patient, non-pharmacological management options should be considered and integrated to the conventional treatment in order to maximize its effects and improve the quality of life of these patients.