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Article Type

Original Study

Abstract

Skeletal muscle injury which com­prises, a high proportion of sport inju­ry, is associated with inflammation, transudation and fibrin deposition (Murray - Leslie, 1986). The injured muscle fibres, when relatively small, have the capacity for regeneration and repair and are again capable of con­traction. With larger injury and/or pres­ence of systemic diseases, there is a reduced capacity for regeneration and repair and the muscle fibers can ulti­mately be replaced by fat and/or fi­brous tissue (Ambrosia, 1986}. A modality able to enhance healing of such injury may facilitate restoration of the prior level of function. Low dose pulsed ultrasonic therapy was proved to be more effective than radiant heat, short-wave diathermy or paraffin baths in helping patients with sprained an­kles to return to work (Middlemast,1978).Various other researches in­cluding topics as surgical wounds, varicose ulcers and pressure sores, were in favor of the healing effect of pulsed ultrasound and support such an idea (McDiarmid et al.,1985 and Hong et al., 1988). Pulsed ultrasound can be applied safly during the early stages of healing without fear of bleeding due to its minimal thermal ef­fect in comparison with the non ther­mal one (Dyson & Suckling, 1978; Partridge, 1987 and Lehman & DeLa-teur, 1989). Other contradictory re­sults proved that low dosage of pulsed ultrasound impair healing when ap­plied on freshly healing tendons in rabbits (Roberts, 1982). Despite these numerous experiments and the impor­tance of early recovery after skeletal muscle injury,

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This work is licensed under a Creative Commons Attribution 4.0 International License.

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