NuVasive NVM5 Manual De Instrucciones página 18

WARNINGS AND PRECAUTIONS cont.
WARNING: A Red Channel may indicate a disconnected or separated electrode or poor
electrode impedance. If a failed channel or channel that has been disabled is accepted,
responses from this channel will not be detected during stimulation. This could lead to a
false-negative result if the myotome is innervated by the spinal level under test. Free Run
events on this channel will not be detected.
WARNING: To avoid trans-thoracic stimulation, ensure both MEP electrodes are properly
attached to the patient's scalp or abdomen before initiating any test.
WARNING: To avoid bite injuries, the patient must be fitted with a bite block before
initiating transcranial MEP testing.
WARNING: MEP stimulation may induce violent muscle contractions throughout the
patient's body. Secure physical restraints should be used, and surgical operations should
be discontinued before and during MEP stimulation. Ensure the surgeon is well notified
prior to any MEP testing.
WARNING: Only use electrodes supplied with the NVM5 System. Use of other electrodes
®
may adversely affect results.
WARNING: Do not place stimulation electrodes over the patient's neck because this
could cause severe muscle spasms resulting in closure of the patient's airway, difficulty in
breathing, or adverse effects on heart rhythm or blood pressure.
WARNING: Do not place stimulation electrodes across the patient's chest because the
introduction of electrical current into the chest may cause rhythm disturbances to the
patient's heart, which could be lethal.
WARNING: Do not place stimulation electrodes over open wounds or rashes, or over
swollen, red, infected, or inflamed areas or skin eruptions (e.g., phlebitis, thrombophlebitis,
varicose veins); and
WARNING: Do not place stimulation electrodes over, or in proximity to, cancerous lesions.
WARNING: Electrodes should be applied only to normal, intact, clean, healthy skin.
WARNING: The size, shape, and type of electrodes may affect the safety and
effectiveness of electrical stimulation and recording.
WARNING: Using stimulation electrodes that are too small or incorrectly applied could
result in discomfort or skin burns.
WARNING: Use caution if electrodes are applied over areas of skin that lack normal
sensation;
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