What is deep heat treatment?
Deep heat treatment is a therapy that sends heat below the
skin surface into tissues and muscles. Deep heat treatments
are used by health care providers such as physical
therapists, chiropractors, and dentists.
When is it used?
Deep heat is used to:
- reduce pain such as low back pain
- relieve muscle spasm
- loosen soft-tissue contractures (muscle shortening that
affects your joints)
- treat chronic arthritis, bursitis, and fractures
- treat inflammation and promote healing.
It may be used after cold treatments when inflammation and
swelling are gone.
Deep heat treatments should not be used if you have:
- circulation problems
- cancer that has recently been treated with radiation therapy
- heat intolerance
- lack of sensation in the area being treated
- metal implants such as pacemakers or IUDs
- heart, lung, or kidney diseases.
Deep heat treatments should not be used on areas above the
eye or around the heart, or if you are pregnant.
How does it work?
The 3 main types of deep heat treatment include:
- high-frequency currents (shortwave diathermy)
- electromagnetic radiation (microwaves)
- ultrasound (high-frequency sound).
Deep heat speeds up healing by increasing blood flow to the
injury. Electromagnetic heat, such as shortwaves and
microwaves, sends heat up to 2 inches into the tissue and
muscles. It works best for injuries in joints, muscles, and
tendons. Heat therapy may help reduce pain.
Before you receive heat treatment, you must remove all metal
objects, including jewelry, glasses, and hearing aids. The
skin over the area being treated will be cleaned.
Short-wave diathermy uses a rapidly alternating electrical
field. Microwaves generally do not penetrate tissue as
deeply as short waves. Both short-ware and microwave
diathermy are considered electromagnetic treatment. If you
have this treatment, an electrode drum is used to apply
heat.
Towels are usually placed in layers between you and the
unit. Treatments with electromagnetic heat last about 15
minutes and are given 2 to 3 times per day for 3 to 14 days.
Ultrasound heat treatments use high-frequency sound waves
that cannot be heard by the human ear. Ultrasound heats a
smaller area than shortwave diathermy. Muscle tissue,
ligaments, and tendons absorb this form of energy very well.
Fat absorbs heat to a much lesser degree. The effects of
ultrasound heat treatment last about 1 hour.
Once the heat treatment has been completed, you will be
checked for any symptoms of dizziness, nausea, or skin
irritation.
What are the risks of deep heat treatment?
All heat treatments have the potential of tissue damage
resulting from high temperatures. During ultrasound
therapy, bony areas with little soft tissue (such as hand,
feet, and elbow) can get too hot and cause pain and possible
tissue damage. Exposure to the electrode drum during
diathermy may produce hot spots. Short-wave or microwave
diathermy signals may interfere with or damage a pacemaker.
Talk with your provider about whether this type of therapy
is right for you.


Disclaimer: This content is reviewed periodically and is subject to
change as new health information becomes available. The
information provided is intended to be informative and educational and is not a
replacement for professional medical evaluation, advice, diagnosis or
treatment by a healthcare professional.
HIA File EXR4113F.HTM Release 9.0/2006. Copyright © 2006 McKesson Corporation and/or one of its subdiaries. All Rights Reserved.
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