Dynatron® 850plus & 550plus
Ultrasound Technical Information
82
Contraindications, Warnings, & Precautions
for Interferential, Premodulated, Russian,
Biphasic, and High Voltage Pulsed Stimulation
Contraindications
Thrombosis: It is possible that the current produces chemical changes in the blood leading
to alterations in the clotting time. At present there is no hard evidence to support this.
Nevertheless, treatment must not be given to any patient who is taking anticoagulants as it
may render these ineffective. The effect of the current is on the platelets and would tend to
spread any clot with perhaps fatal results in a patient with coronary thrombosis. If a patient
has a history of deep vein thrombosis, even many years past, the treatment may increase
rather than decrease swelling.
Pacemakers: Patients with pacemakers should avoid all high and medium frequency
generators.
Cardiac Conditions: The electrodes should be placed to avoid the stellate ganglion and the
heart itself. If there is a potential for heart problems, the clinician must exercise professional
judgment and use adequate precautions. The clinician should not expose the patient to risk if
possible heart problems are suspected.
Bacterial Infections: The effect on bacteria is uncertain, and it is advisable that bacterial
infections should not be treated.
Malignancy: The use of Interferential, Premodulated, High Volt, Biphasic, or Russian Stim
treatment is contraindicated in patients with clinically diagnosed cancer.
Additional warning from the Canadian Health and Welfare Department, Health Protection
Branch: WARNING: Thoracic applications are contraindicated. Cardiac fibrillation may
occur if output current is 50 mA RMS or greater for any output circuit.
Warnings
1. Adequate precautions should be taken in the case of persons with suspected or diagnosed
epilepsy.
2. Severe spasm of the laryngeal and pharyngeal muscles may occur when the electrodes are
positioned over the neck or mouth. The contractions may be strong enough to close the
airway or cause difficulty in breathing.
3. Caution should be used in the transthoracic application of EMS devices in that the
introduction of electrical current into the heart may cause arrhythmia.
4. This device should be kept out of the reach of children.
5. The Dynatron device should not be used in the following conditions:
• Pregnancy
• Acute and sub-acute thrombophlebitis
• Potentially malignant lesions
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