Infared radiation (IRR) superficial or deep?
Microwave (MWD) superficial or deep?
Shortwave (SWD) superficial or deep?
Define eletromagnetic radiation
Radiation consisting of waves of energy associated with electric and magnetic fields resulting from the acceleration of an electric charge
Where does the magnetic field lie in relation to the electircal field?
Is there a medium required for electromagnetic radiation and what direction does it travel in?
No medium required
Travels in a straight line
Why is MWD deep whereas IRR superficial?
MWD has longer wavelengths and so can skip over structures to deeper tissues (4-5cm)
What is IRR?
A superficial thermal agent used for the relief of pain or stiffness
What types of IRR lamps are there and how long does each take to warm up?
Luminous - 30 seconds
Non-luminous - 5-15 minutes
Temperature, time application and patient positioning for IRR?
What is microwave diathermy?
Produces ionic motion of charged molecules = friction = heating
Application time MWD
Safety issues? - interferences
Other therapeutic machinery
Check output on machinery with fluoro tube first
The production of heat takes a little while to develop
Need to turn up the intensity slowly
Wait for the patient to report the first mild sensations of heating
Patient perception of heat is critical
Totally reliant upon feedback from superficial receptors
Instruction that the patient only feel the gentlest wamth is paramount
Output meter on the machine is irrelevent
Contraindications to deep heat
Inability to communicate
Semester 2, year 2, 2012