US/50 User's Guide 23
US/50 General Operation and Application Procedures
Application of Ultrasound
Therapeutic ultrasound provides for increased cell permeability as well as
micro-massage. Analgesic and thermal effects occur when ultrasound is applied
to the nerve root and primary treatment site.
Ultrasonic energy is transmitted by means of an applicator, or transducer, applied
directly to the skin. Since ultrasonic energy will not be efficiently transmitted
through air, a conducting medium (water or gel) must be used between the
transducer and skin tissue. Amrex Conductance and Coupling Gel is
recommended. This gel is excellent for ultrasonic energy transmission as well as
conductance for application of electrical muscle stimulation. The Amrex
transducer utilizes a polished aluminum faceplate. Coupling agents other than
Amrex Conductance and Coupling Gel may cause a discoloration or "pitting" of
the aluminum.
Apply a generous amount of gel to the area being treated. Place the transducer
in contact with the skin surface BEFORE increasing the output intensity. Move
the transducer in a slow, rotary or stroking motion.
If the area to be treated is an irregular surface that does not allow proper
soundhead contact, the AMREX transducer may be utilized for underwater
therapy. Immerse the area to be treated and the transducer maintaining
approximately one inch distance between the area being treated and the faceplate.
To insure proper transmission of ultrasonic energy, brush away air bubbles if
they appear on the soundhead's faceplate.
At the conclusion of the treatment, thoroughly clean the transducer faceplate
before placing the transducer in the Cradle. Always return the Ultrasound
Intensity control to "0" when the transducer is not in contact with the patient to
avoid serious damage to the transducer crystal and generator.
Caution
Excessive doses of ultrasound can cause damage to tissue. Periosteal pain is an
indication of excess intensity. If this occurs, the power should be reduced and/
or move the transducer more quickly over the area being treated. The Interrupted
Output mode may also be utilized to reduce heat build up in tissue and for the
mechanical effect of ultrasound on tissue.
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