Dynatron® 850plus & 550plus
Ultrasound Technical Information
94
Current Limit Warning
When you reach the maximum output current limit, the device will:
• Immediately stop increasing the intensity and automatically reduce the intensity a few
increments
• Beep several times
• Flash the intensity display
You should rarely, if ever, encounter the current limit warning during a patient treatment as
reaching the current limit would often require an intensity setting that is uncomfortable and
intolerable to most patients. For patient safety and comfort, you must address this warning
before continuing with the treatment. Consider the following possible causes, for example:
• The patient is unable to adequately feel the current and is unable, therefore, to report
discomfort at the high intensity level.
• When using four very large electrodes for a treatment, current is dispersed over a larger
electrode surface area permitting a higher intensity setting without discomfort to the
patient.
As you increase the intensity, ensure that the patient feels the current as expected. If the
patient is unable to feel the current, you could unintentionally raise the current to a
level much too high and risk causing unnecessary, possibly severe discomfort to the
patient. Keep the intensity very low if the patient has little or no feeling in the
treatment area (see “Contraindications, Warnings, and Precautions” in this manual).
Keep in mind, a wide range of factors can cause the patient to lack sufficient feeling in the
treatment area, including, but not limited to, pain control drugs, use of ice packs, neurological
damage, etc. Always consider these and other factors when delivering an electrotherapy
treatment, and determine intensity settings based upon your medical expertise and judgment.
If you encounter the Current Limit warning, it could indicate that the patient cannot adequately
feel the current. Ensure that the patient can feel the current. If you are treating an area that may
be desensitized for any reason, reduce the intensity immediately. Read all the warnings
regarding treatment of desensitized areas provided in this manual under “Contraindications,
Warnings, and Precautions.”
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