Ultrasound Therapy

The equipment used for ultrasound therapy consists of a generator of high frequency current and an applicator, usually referred to as a “transducer”. The  generator  produces  an  electrical current  of  desired  frequency  which causes a crystal in the transducer to vibrate rapidly, producing sound waves. The ultrasonic energy is transmitted to human tissue by contact with the transducer. However, ultrasonic energy cannot be transmitted through the air, so a coupling medium must be used between the transducer and the skin. Different media are water, oil, and transmission gel.

Continuous  ultrasound  means  that  the  ultrasonic  waves  are  constantly emitted from the transducer. This form of ultrasound is used over thick tissue and requires  constant movement of the transducer  over  the  area being treated. Pulsed ultrasound means that the ultrasonic waves are emitted intermittently. This method is used in areas where underlying bone is covered by a relatively thin layer of tissue. The transducer is kept stationary throughout the treatment.



  1. Increase blood
  2. Raise tissue
  3. Increase calcium
  4. Increases pain threshold, therefore· decreasing



  1. Acute and chronic
  2. Sprains and strains
  3. Bursitis, tendonitis,
  4. Adhesive capsulitis (frozen shoulder)