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Jan 25, 2017

9 Types of Physical Therapy Modalities Explained


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side-image-rehab.jpgIn addition to therapeutic exercise, manual therapy and other common treatment methods, rehabilitation specialists use a variety of modalities to reduce pain, facilitate healing and restore function. Following are nine types of physical therapy modalities rehab experts are using today, as well as a few of their applications and expected outcomes.

1. Ultrasound

Ultrasound has been approved by the FDA for a wide variety of therapeutic uses, including fracture healing, thrombus dissolution, and the treatment of plantar fasciitis and epicondylitis. In most ultrasound applications, a hand-held transducer is moved in a circular motion over an injured area. The transducer produces sound waves too high-pitched for humans to hear, and those waves heat tendons, muscles and other tissues to improve blood flow and hasten the healing process.

2. Phonophoresis

Phonophoresis is the specific application of ultrasound to enhance the delivery of topical drugs. This technique has proved effective in enhancing the absorption of dexamethasone, a glucocorticoid used for anti-inflammatory purposes. In this and other applications of phonophoresis, the drug of choice is combined with a gel rubbed into the affected area, and ultrasound waves dilate nearby blood vessels, enhancing uptake into the bloodstream.

3. Electrical Stimulation

Electrical stimulation, or E-stim, is the general term for several modalities that involve electrodes attached to a patient’s skin. These modalities can be used for both pain relief and functional improvements, even in cases involving neurological disorders. In fact, E-stim has proved effective in facilitating functional facial movements in patients with Bell’s palsy.

4. Iontophoresis

Similar to phonophoresis, iontophoresis is a type of E-stim used to administer medication. The electrical current helps to push topical drugs through the skin and into the bloodstream, typically in order to reduce inflammation, prevent muscle spasms or break up mineral deposits. Like phonophoresis, iontophoresis has been effective in delivering dexamethasone for anti-inflammatory purposes, as well as acetic acid for healing soft tissue injuries.

5. Transcutaneous Electrical Nerve Stimulation

Commonly referred to as TENS, transcutaneous electrical nerve stimulation is a type of E-stim used to manage acute and chronic pain. While researchers haven’t concluded its exact mechanisms of action, it is thought that various frequencies activate various pain receptors, sending non-painful stimuli through injured tissues and into the nervous system.

6. Heat

Dry heat has long been a go-to treatment for subacute and chronic injuries, as well as the alleviation of delayed onset muscle soreness (DOMS). Unlike ultrasound and other “deep heating” methods, dry heat only significantly affects skin, fat and other superficial tissues. Still, heat’s local effects are often enough to decrease pain, increase mobility and temporarily allow for pain-free movement.

7. Moist Heat

Moist heat is another form of superficial heat therapy, and in most cases therapists will simply apply damp heat packs to injured areas. It works via the same mechanisms as dry heat, but several studies suggest that moist heat penetrates deeper and faster into injured tissues and facilitates more significant functional improvements.

8. Cold

Unlike heat, cold or ice therapy is used to reduce blood flow and inflammation during the acute phase of healing. It can also reduce or temporarily prevent swelling in an injured joint or muscle following exercise, making it a useful post-exercise modality. In many cases, PTs will first apply heat to help patients “warm up” and gain mobility for therapeutic exercise, and apply ice to reduce the inflammatory response afterwards.

9. Light Therapy

Finally, light therapy involves the application of lasers, light-emitting diodes (LEDs) and other light sources to injured tissues. Different types of light work in slightly different ways, but in general, they all exert their effects on chromophores, light-absorbing molecules similar to chlorophyll in plant cells. Chromophores use the energy from absorbed light to produce more ATP, the cellular energy needed to synthesize enzymes, DNA, RNA and other materials critical to the repair process. Light therapies have been shown to be effective in a variety of applications, including the treatment of carpal tunnel syndrome, lower back pain and even wound healing.

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