Users Manual Part 1

51
Nerve Integrity Monitor
Surgery Notes
Please be aware of the following:
• Use of a stimulating probe is encouraged during surgery in conjunction with Nervassure monitoring.
• When using the NIM EMG endotracheal tube for Nervassure monitoring, tube movement or mucus buildup during surgery can
reduce Nervassure responses requiring a new baseline.
• A decrease in the EMG amplitude (greater than the alarm limits) may occur when performing Nervassure monitoring lasting
longer than four hours. You may need to acquire a new baseline if this occurs. Please note that stimulating the nerve for up to 8
hours poses no signicant risk of nerve injury.
After surgery
Removal of the Nervassure electrodes is the reverse of installation. Refer to the Instructions for Use included with your electrode set.
When the case is complete
Before closing the surgical site, the surgeon should evaluate the nerve’s functional integrity one more time. This can be done by
stimulating the nerve both proximal and distal to the immediate dissection area as far as is accessible within the surgical eld. Use
the same pre- and post-surgical dissection stimulation level to compare the response.
Continue to monitor with the NIM Vital system throughout the procedure (until the incision is closed), since items such as wound
dressings might exert stress or pressure on the nerve and aect its function.
When monitoring is complete
Turn o the power to the NIM Vital system when the entire procedure is completed and have the licensed medical practitioner
remove the electrodes from the patient.
Contaminated single use electrodes and probes must be disposed of in an appropriate sharps biohazard container in accordance
with hospital or other user facilities policy.
Managing patient interface boxes
One of the following scenarios could occur when pairing the patient interface box to the NIM Vital system:
• NIM Vital system that has one wireless patient interface box: after the user powers on the system, undock the patient
interface box and place it on the table or NIM Vital cart. The system automatically pairs with it. Do not undock patient interface
box prior to powering on the system.
• NIM Vital system that has two wireless patient interface boxes: undock patient interface box 1 and place it on the table or
NIM Vital cart. If patient interface box 2 is already connected to the system, the NIM Vital console prompts you to choose which
wireless patient interface box you want to use for the procedure. Select either patient interface box 1 or 2 and the NIM Vital
system pairs with the patient interface box you selected.
• NIM Vital system that has a wired patient interface box: undock the patient interface box and place it on the table or NIM
Vital cart. Since you are using a wired connection, the NIM Vital system rejects any existing wireless connection and will forget/
unregister all undocked patient interface boxes. The system pairs with the wired patient interface box.
• User decides not to use the wired patient interface box: unplug the wired patient interface box from the receptacle on the
back of the NIM Vital console. The NIM Vital system prompts the user to decide whether to switch to a wireless connection. Select
to pair wirelessly and the NIM Vital system automatically pairs with the patient interface box.
If your wireless patient interface has trouble pairing with the NIM Vital system, connect it using the patient interface cable. Follow
the above instructions to pair the wired patient interface box to the NIM Vital system.
If the NIM Vital system reboots, the NIM Vital system registers/remembers only the patient interface boxes that are docked or wired
to it. Undocked patient interface boxes are forgotten/unregistered by the NIM Vital system.
Note: If the system alerts the user with a warning message indicating there is not enough power in the console battery, use Mains
power to charge the console battery and patient interface box batteries.
Power backup
General operation
The NIM Vital System is equipped with a rechargeable battery (PN: NIM4CB01), which is installed in the rear of the console that
acts as a battery backup system. The console battery serves two purposes: 1) charges the patient interface box batteries when the
system is disconnected from the mains power and 2) provides battery back-up for the console if mains power is lost during use for
up to ve minutes.
FCC use only, not for Medical use