Diathermy
- delivered as short wave (SWD) and microwave (VWD), and continuous or pulsed (intermittent)
- SWD - deep tissue heating without adding heat through reflection off bones
- MWD - deep tissue heating, some potential to add head through reflection off air, soft tissue, and bones
- intervention is contraindicated for anyone with an implanted electronic medical device (e.g. nerve stimulator), implanted metal, or over bone growth plates
A brief video messages about program expectations for learning about diathermy
Physiological Effects of Diathermy
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Continuous SWD |
Pulsed SWD |
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Hemodynamic |
Increased circulation |
Increased circulation
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Neuromuscular |
Increased nerve conduction velocity Increased pain threshold Changes in muscle strength |
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Metabolic |
Increased metabolic rate Increased enzymatic activity |
Increased microvascular profusion Increased local tissue oxygenation increased cellular nutrient availability increased phagocytosis by activating macrophages Activate growth factor in fibroblasts Accelerate cell growth and division |
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Elastic |
Increased collagen extensibility |
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Clinical Indicators for Diathermy
Much like superficial heat, diathermy can be used effectively in conditions resulting from chronic spinal pain, sprains and strains, and postural dysfunctions. Pulsed diathermy can be used much like our non-thermal agents to control pain and edema. Most specifically, pulsed SWD is used to facilitate wound healing (post-surgical, decubitus ulcers, burn-related injury)
