Diathermy Flashcards
Greek meaning of Diathermy
Through heating
Frequency range for short-wave
10 to 100 mHz
Frequency range for microwave
300 mHz to 300 gHz
Wavelength range for short wave
3 to 30 m
Wavelength range for microwave
1 mm to 1 m
Types of Diathermy
Inductive coils
Capacitive plates / Condenser
Magnetron
Thermal effects of Diathermy
Increased Vasodilation
Elevation of pain threshold
Alteration of muscle strength
Increased soft tissue extensibility
Indications for Thermal Diathermy
Pain Control
Accelerated Healing
Decreased joint stiffness
Increased ROM
Indications of Non-thermal Diathermy
Pain and edema control
Wound healing
Nerve healing
Bone healing
Precautions for applying Diathermy
Stay away for 1-2 meters
At least 30-50 cm away from the PSWD applicators
Out of the direct beam of any MWD device
Precaution for all kinds of Diathermy
Electronic or magnetic equipment in vicinity
Obesity
Copper-bearing intrauterine contraceptive devices
Precaution for Non-thermal Diathermy
Pregnancy
Skeletal immaturity
Contraindications for all forms of Diathermy
Implanted or transcutaneous neural stimulators
Contraindication for Thermal-level Diathermy
Metal implants or pacemakers
Malignancy
Pregnancy
Eyes
Testes
Contraindications for Non-thermal Diathermy
Deep tissue
Substitute for conventional therapy for edema and pain
Parameters for SWD
F: 3-30 MHz
Non-ionizing
WL: 27.12 MHz, 11m
Patient’s ions and dipoles oscillate at the same frequency with the device circuit
Electromagnetic Resonance (Tuning)
Physiological and Therapeutic effects of SWD
Increases blood supply
Increases metabolism
Decreases BP
Increased activity of Sweat Glands
No perception of heat
Dose 1
Mild perception of heat
Dose 2
Comfortable perception of heat
Dose 3
Maximum tolerable perception of heat
Dose 4
Parameters for CSWD
PP: 500 W
PF: N/A
PD: N/A
MP: N/A
TT: 20 mins (1200 secs)
D: 600 kJ
Parameters for PSWD
PP: 500 W
PF: 200 Hz
PD: 400 μs
MP: 40 W
TT: 20 mins (1200 secs)
D: 48 kJ
Indications of SWD
Pain and edema control
Soft tissue healing
Nerve healing
Bone healing
Application method where capacitive plates are used.
Condenser field method
Mediums for inductive method
Air space
Dry towel
Instruments used for inductive method
Cables
Drums
Electrode positioning wherein it is placed over opposite aspects of trunk and limb
Contraplanar (Transverse positioning)
Electrode positioning wherein it is placed side by side on the same aspect of the body part with adequate space in between
Coplanar
Electrode positioning wherein it is placed at the end of the limb with vertical orientation
Longitudnial method
Electrode positioning wherein it is placed side by side on the same aspect of the body part with adequate space in between.
Coplanar
Electrode positioning wherein it is placed over the site of lesion and the other electrode at a distant part of the body or may not be used at all.
Monopolar technique
