What are the radio waves measurement in?
30khz-300khz
What does diathermy mean
What wave range are waves in
Purpose
Radio frequency used to generate heat in body tissues and heat produced by resistance of tissues
Shortwave Longwave Pulsed shortwave Plused electromagnetic fields pemf Method of heat transfer
27.12 MHz
2.450
27.12
Pulsed radio frequency
Method: conversion
Short wave types
Electrical fields
Magnetic fields ?
E-capacitative
Magnetic field - inductive
Capacitative method like how to use it
Electrical field methods
Patient tissues are part of the electrical capacitor
Be cautious for excess heating
Distance electrode and body part minimum 3cm
Proper guarding and patient postion
Oscillation and rotation of the tissues produce heat
Use applicatior discs ethier flexible metal discs can be used as electrodes
Can be applied in 3 ways
Inductive method how does it work
Use application in oscillating magnetic field “eddy”
Energy can transmitted via airwaves
Patient is in the electromagnetic produce it lowers impedance
Drum and sleeves electrodes
Guidelines for electrodes (5)
Equal in size
Slightly larger than treatment area
Equal distance and at right angles to skin surface
Metal and Sweat may cause burns epsecially implants
Fat resist eletrical flow and fat is heated in a eletrical field
Pulsed SWD properties
4
Intreruppted in a series of high frequency bu
Pulse swd Pulsed repetition rate Pulsed duration Peak pulse powe Duration
-1-1000hz Duration 25-400 microseconds Peak pulse power 100-1000w Duration Of time 20 mins (5-15 acute; 10-20 chronic)
Microwave diathermy Properties What's device name (transformers) MWD - high or short Shorter wavelength than swd (4) Generates what Thermal effect
Magnetron
MWD - has higher frequency
Generates strong eletric field and little magnetic field
Thermal effect on deeper structures less
MWD applicators (electrodes)
Circular applicators feel heat where
Rectangular shaped applicators feel hear where
Circular - 4-6 maximum temp at perimeter
Rectuauglar- 4.5x5 or 5x21
Maximum temp at center
Effects on tissue flexiblity
Does this increase with heat and prolonged LOW stretch tissue elascity that being
What have studies shown to increase
Ankle DF , hamstring tightness, triceps,
And yes it does yes it does
Pulsed magnetic fields Delivered low or high intensity No heating effects Average power typically limited to What's it used for?
No heating effects
Low intensity
1w
For tissue healing
Physiological effects of diathermy vey similiar to heat
Increase tissue temp Dilation vaso Decreased blood viscosity Increased lymphatic and venous flow Increase metabolism Changes in physical properties of tissue Muscle relaxation Increased pain threshold
Is diathermy effective for treating muscle strength
No because waves to short not capable of producing depolarization and contraction of muscles
What is heat good for what conditions
Oa, ab pain, trigger points, plevic inflammatory disease, low back pain
How does diathermy increase bone healing
Cirulation and increasing temp
Non thermal effects
Used to treat soft tissues and wounds realated to depolarization of damaged cells
Output meter
Indicates realitives output in watts
How to prep patient
Choose devices Describe effects Position patient comfortable Remove all metals Inspect skin Place cotton on skin Position applicator Choose apporoate parameters Tell patient not to move Avitave device Tell patient if it gets to hot to tell for therapist
Adjusting shortwave unit
Manual tuning adjust patient circuit
Set output to 30-40 percent
Adjust tuning control until power output reaches max
Then adjust to patients tolerance to 50 percent
If more than 5o is out of resonance
.
Dosage is?
Duration?
Frequency of treatment
Acute? Subacute or chronic
Amount of enegry delivered to body
15-30 minutes
1-3 times a day for acute and daily or evey other day for sub acute or chronic conditions
Dose 1?
Dose2?
Dose 3?
Dose 4?
Dose 1 -no sensation heat low acute injuries sprains and strains
Dose 2- mild heating subacute injuries and inflammation
Dose 3- moderate or pleasant heating pain or chronic inflammation
Dose 4- vigorous heating increased blood flow heating or collagen fibers for stretching of soft tissue of
Indications
Inflammatory disease (OA, RA, etc..) Pain Tightness Chronic plevic inflammatory disease Trigger points Limited ROM
Contraindications
Refer to photos
Precautions
Be careful of eletrical devices
Women who are menstrauting especially low back or pelvis regions
Atrophic infected damaged skin
When is diathermy the treatment option
Safety issues cost effective
Us vs. diathermy
Provides a greater depth of heating than superficial than thermal modalities
Can heat larger area more than US