Shared Flashcard Set

Details

shortwave diathermy
SWD notes from ppt
35
Anatomy
Graduate
03/27/2012

Additional Anatomy Flashcards

 


 

Cards

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