Understanding Therapeutic Modalities

​Series 2 - Therapeutic Ultrasound

What Is Ultrasound?
​Ultrasound is defined as inaudible acoustic vibrations that may produce either thermal or nonthermal physiological effects. When sound scatters and absorbs as it penetrates the tissue, its energy is decreased.

Equipment
The main piece of equipment for delivering therapeutic ultrasound is a high-frequency generator, which provides an electrical current through a coaxial cable to a transducer contained within an applicator. The crystals in the head of the applicator expand and contract producing oscillations at the same frequency as sound waves.

​Indications - Thermal Effects

• decreases muscle spasms
• decreases pain perception
• increases blood flow
• increases metabolic rate
• increases collagen elasticity
• decreases joint stiffness
• increases capillary permeability
• increases edema

​Indications - Non-Thermal Effects.

• Cavitation: formation of gas bubbles that expand and compress resulting in an increased flow of fluid around these vibrating bubbles
• Microstreaming: unidirectional movement of fluids along the boundaries of a cell membrane, altering the cell membrane structure thereby accelerating the healing process.
• These effects can
  • alert membrane properties
  • alter cellular proliferation
  • produces increases in proteins associated with inflammation

Application
Acute injuries require more frequent treatments over a shorter period of time
Chronic conditions require fewer treatments over a longer period of time
Ultrasound should begin as soon as possible after injury to maximize effects on the healing process.
Acute conditions may require treatment once daily for 6-8 days.
Chronic conditions can be used on alternating days for 10-12 treatments.

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References
Arnheim’s Principles of Athletic Training - A Competency Based Approach, William E. Prentice, 12 Edition, 2006, pg 412-415

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​We offer ultrasound. Book an Athletic Therapy appointment today to determine if ultrasound should be included in your therapeutic treatment.