Term
| define short wave diathermy |
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Definition
| "through heating" by radiofrequencies |
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Term
| what does shortwave diathermy do and how |
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Definition
| heats deeply into tissue using readio frequencies |
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Term
| what are the 2 modes of SWD |
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Definition
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Term
| what are the 2 types of pulsed shortwave diathermy |
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Definition
| pulsed shortwave diathermy, pulsed electromagnetic field |
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Term
| what are non-thermal effects of SWD? |
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Definition
| ion binding at cell membrane, local microvessel perfusion, cell growth/inhibition, ATP stimulation, increased protein synthesis |
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Term
| what are the effects of local microvessel perfusion? |
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Definition
| increased lumen size results in increased bloodflow |
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Term
| describe how SWD works with a capacitative or electric field |
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Definition
| there are 2 electrical plates/electrodes. An AC current with EMF goes between the plates. The patient sits between the plates in the electric field. |
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Term
| do the electrical plates ever contact the patient? |
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Definition
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Term
| describe how SWD works with an inductive or magnetic field |
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Definition
| AC current travels through coiled wires. An EMF is created perpendicular to the coil. The EMF induces electrical current in tissues. The friction of tissue oscillation produces heat. |
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Term
| what are 2 applications of inductive or magnetic field? |
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Definition
| coil the wires around a body part (insert leg into coil of wires). Use a drum applicator that contains coiled wires such that the coil can be placed parallel to a body part and EMF will be released perpendicularly right into the body part. |
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Term
| is the coil around body parts or drum more common? |
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Definition
|
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Term
| does the coil around a body part or the drum produce eddy currents? |
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Definition
|
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Term
| what does inductive or magnetic field SWD induce in a patient's body |
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Definition
|
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Term
| can the person contact the cables/wires? |
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Definition
| no. there's so much energy in them that they would burn the patient |
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Term
| what determines magnetic field strength? |
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Definition
| distance, intensity, electrical conductivity |
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Term
| how does distance relate to magnetic field strength |
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Definition
| the closer the source, the stronger the magnetic field |
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Term
| what are indications for nonthermal SWD? |
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Definition
| pain/edema, pain control, wound healing, nerve healing, bone healing |
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Term
| what are indications for thermal SWD? |
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Definition
| improve blood flow, increase temperature of collagen to affect change |
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Term
| what are advantages of using SWD? |
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Definition
| affect larger areas than US; affect deeper areas than superficial applications; no reflection so it doesn't lose energy; unattended application |
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Term
| what deep thermal application goes farthest into muscle? |
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Definition
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Term
| what are contraindications for SWD? |
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Definition
| metal, pacemakers, neural stimulators, malignancy, pregnancy, eyes, testes, deep tissue or organ disease, epiphyseal plates |
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Term
| why can't you use SWD with pacemakers and neural stimulators |
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Definition
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Term
| why can't you use SWD with pregnancy |
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Definition
| bad to inc temp of uterus |
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Term
| why can't you use SWD with malignancy |
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Definition
| increase blood flow to tumor growth |
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Term
| can you treat someone with SWD who is sitting in a metal chair? |
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Definition
|
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Term
| what happens if there is metal around SWD |
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Definition
| metal will absorb radio waves and will heat up. |
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Term
| why don't PTs often use SWD? |
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Definition
| risk of fire and effect on metal |
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Term
| what are patient precautions for SWD? |
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Definition
| obesity, copper iud, other equpiment |
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Term
| why is obesity a patient precaution for SWD? |
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Definition
| capacitive plates can't be close to the person |
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Term
| what are therapist precautions for SWD with thermal effects |
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Definition
| stand 1-2m from the device |
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|
Term
| what are therapist precautions for SWD with nonthermal effects |
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Definition
| stand 30-50cm from the device |
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Term
| why are there therapist precautions for SWD? |
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Definition
| possibility for increased spontaneous abortion, abnormal fetal development, and malignancies |
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Term
| what is the biggest adverse effect of SWD |
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Definition
|
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Term
| how are burns caused by capacitive SWD |
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Definition
| close to the applicator, sweat, heat concentrates in superficial fat layers |
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|
Term
| how are burns caused by inductive SWD |
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Definition
| close to the applicator, sweat, high electrical conductivity |
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