NuVasive NVM5 Manual De Instrucciones página 21

WARNINGS AND PRECAUTIONS cont.
PRECAUTION: Do not allow liquids to enter the Control Unit or Patient Module, as this
may result in damage or malfunction of the NVM5 System. Avoid dripping any fluids into
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any Bendini equipment. Disconnect the power and allow the system to dry if you suspect
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fluids may have entered any part of the System.
PRECAUTION: The NVM5 System is not protected against the effects of defibrillation. Do
not use in conjunction with a defibrillator.
PRECAUTION: While the NVM5 System is designed to assist in the electromyographic
location of spinal nerves in proximity to the surgical site, it is not intended to take the
place of thorough knowledge of spinal anatomy and appropriate surgical technique, nor
should the information provided by the system be construed as definitive indicators of
nerve location. Such factors as the distance from the nerve, the position and placement
of electrodes, individual muscle and/or nerve responses, the proximity and strength
of sources of electrical interference, and other patient and environmental factors, may
influence the operation. If, in the judgment of the clinician, this resistance is sufficient to
preclude safe placement of instruments, the procedure should be suspended.
PRECAUTION: To avoid trans-thoracic stimulation, the Stimulation Anode should not be
located on the chest or upper back. Place this electrode on the lower abdomen, gluteus,
or upper flank.
PRECAUTION: To optimize accuracy of EMG recording, the EMG Common electrode
should be located between the site of stimulation and the recording electrodes (e.g., on
the flank).
PRECAUTION: The NVM5 System contains sensitive electronic components which may
be damaged by electrostatic discharge (ESD). While safeguards have been designed
into the System, normal precautions should be taken to avoid causing ESD impulses to
occur directly on the EMG input electrodes. For example, it is recommended that before
touching the EMG electrodes, the operator should touch the barrel of the main cable
connector between the Control Unit and the Patient Module to reduce any accumulated
charge on the operator.
PRECAUTION: Prior foraminal or extraforaminal surgery may leave scar tissue at the site
of surgery which can result in undue resistance to instrument insertion. Exercise care in
inserting instrumentation in such circumstances to prevent the application of excessive
force that can damage internal structures.
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