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Ultrasound therapy

Therapeutic ultrasound is the use of high frequencies of sound  for therapeutic purposes.  In physiotherapy applications,  the frequency level  is usually in between 0.7 to 3.3 MHz.

Maximum energy absorption is in between 2 to 5 cm below the skin. Ultrasound is absorbed primarily by connective tissue such as ligaments, tendons, fascia,  scar tissues as well as muscle and fat tissue.

Therapeutic ultrasound may have two types of benefit: Thermal and non thermal effects.

Thermal effects are due to increased molecular activity in tissue cells caused by vibration of sound waves. This increase in temperature can be up to 5 degrees in superficial muscles with an application of 10 minutes of ultrasound. 

Non-thermal effects of ultrasound are cavitation, microstreaming and acoustic streaming. Cavitational  effects result from the vibration of the tissues which may  lead to microscopic air bubble formation. It is also believed that  vibrations caused by therapeutic ultrasound applications  stimulate cell membranes. This physical stimulation is regarded to improve the cell-repair effects of the inflammatory conditions.

Although, the effect of ultrasound is still being studied, the results of some studies confirm that ultrasound therapy may accelerate the healing process in damaged tissues.  And therapeutic ultrasound is recommended for muscle, tendon, joint pain, as well as neuropathy and carpal tunnel syndrome.



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