Troubleshooting 84
RNS
®
System User Manual
TROUBLESHOOTING
DAMAGED PRODUCTS
Inspect NeuroPace products for any damage or breach in package seal integrity. If packaging
appears to be wet, punctured, or damaged, contents in package may no longer be sterile. Product(s)
with damaged components and/or packaging should not be used and should be returned to
NeuroPace for replacement.
G
ENERAL TROUBLESHOOTING ACTIVITIES
Problems with the RNS
®
System may be revealed during an interrogation with the display of an error
message on the programmer or through review of lead impedances, battery measurements, or real-
time ECoGs.
If attempts to resolve the problem are ineffective and the problem persists, complete all of the
following activities:
• Record all error messages displayed.
• If interrogation of the neurostimulator is possible, complete the interrogation and synchronize
the programmer with the Patient Data Management System.
• Contact NeuroPace for further assistance.
Abnormal Lead Impedance (greater than 3500 Ohms or less than 250 Ohms)
Troubleshooting During an Intraoperative Procedure
The goal of the following procedures is to ascertain if the abnormal lead impedance measurement
is associated with the lead or with the RNS
®
Neurostimulator port to which the lead is connected.
1. Repeat the impedance measurements.
2. If the impedance remains abnormal, note the electrode label associated with the
abnormal impedance
3. Reconnect leads in the same neurostimulator port.
• Disconnect and reconnect the leads to the connector cover and neurostimulator
according to the instructions in the Noise, Artifacts, Poor Signal Displayed, or No
Signal Displayed in Real-time ECoG section of this manual.
• View the real-time ECoGs to verify that the signal is sufficient and without noise or
artifacts.
• Repeat impedance measurements.
4. If the impedance remains abnormal, note the electrode label associated with the
abnormal impedance.
5. Place leads in the opposite neurostimulator port.
• Disconnect leads, place leads in the opposite connector cover ports, and reconnect
the connector cover and neurostimulator according to the instructions in the Noise,
Artifacts, Poor Signal Displayed, or No Signal Displayed in Real-time ECoG
section of this manual.
• Program the new lead information and montage and use the same electrode labels
for the new lead configuration.
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