<p>http://www.northhoustonchiropractic.net/site/ultrasoundtherapy.html Ultrasound therapy is a form of diathermy, the deep heating of tissues. Other types of diathermy include microwave and radio frequency (short-wave) or high-frequency devices. At a tissue depth of 2 inches, diathermy devices should produce heat between 104 and 114 degrees Fahrenheit (40 to 45.5 degrees centigrade) for a maximum of 20 minutes, according to the U.S. There are two approaches when using ultrasound therapy: continuous wave and pulsed wave. In cases where heating is not desired, such as with acute inflammation or with wound care

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