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13 Cards in this Set
- Front
- Back
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How Diathermy Works
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Electromagnetic energy produces deep heating w/in tissues |
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What is Radiofrequency of SWD? |
Ranges up to 300 MHz (generally 27 MHz) Short wavelength of no more than 200 m |
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Continuous vs. Pulsed SWD |
1. Continuous = heats deeper structures 2. Pusled = allows dissipation of heat during off cycle |
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Inductive Coil vs. Capacitive Plates |
1. Inductive Coil: Heading by magnetic field --Works better for deeper structures (i.e. muscle) 2. Capacitive Plates: Heating by electric field -Better for superficial structures |
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How is heat generation determined using Inductive Coil SWD depend on? |
1. Strength of magnetic field 2. Distance of applicator 3. Conductivity of tissues (lots of water in muscles & synovial tissue = high conductivity) |
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Conductivity of Tissues |
1. High = Muscles, synovial tissues 2. Low = Fat, Bone, Collagen |
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In which type of SWD is patient part of circuit? |
Capacitive Plates |
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Indications for Thermal SWD |
1. Increase joint ROM 2. Pain management 3. Increased tissue healing |
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Indications for Nonthermal SWD |
1. Pain control 2. Decreased edema 3. Resoluation of acute & chronic infection 4. Wound control & soft tissue healing |
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Contraindications for Thermal SWD |
1. Pregnant 2. Pacemaker 3. Insulin pump (any transcutaneous device) 4. Epophyseal plate 5. Metal implant 6. Jewelry 7. CA 8. Testes/Eyes |
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Contraindications for Nonthermal SWD |
1. Pregnant 2. Pacemaker 3. Insulin pump (any transcutaneous deice) 4. Over Diseased organ 5. Over Metal loops that secure plates or rods |
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Precautions of SWD |
1. Use near electronic or magnetic equipment (computers, cell phones) 2. Very obese 3. Patients or people nearby using metal bearing intrauterine devices 4. Pregnancy of PT administering tx |
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Treatment Time for SWD |
1. Thermal = 20 min (place towel cover as layer) 2. Nonthermal = 30-60 min |
