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Ultrasound

In rehab ultrasound (US) means therapeutic verses diagnostic ultrasound.  Diagnostic US uses sound waves to create an image for examination (such as a sonogram of a baby or an echocardiogram of a heart).  Therapeutic US uses sound waves to generate heat.  US can heat tissues deeper and warmer than can be achieved with the application of a hot pack to the skin.  US is used most often to heat tendons and ligaments prior to stretching exercises to improve flexibility.  The affected area must be shaved in order to use US as the hair coat of animals will deflect the sound waves and prevent tissue penetration of the heat.
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