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Troubleshooting
95
RNS
®
System Programming Manual
Insufficient Charge
Insufficient charge occurs when the neurostimulator is unable to fully deliver the programmed
therapy. It may be due to high lead impedance or the neurostimulator configuration settings. If you
receive an insufficient charge alert (see
and
on page
) that cannot be
explained by observed lead impedance changes, or if the first entries in the PDMS interrogation
report event list show the “Programmed current” is higher than the “Lowest delivered” current, contact
your NeuroPace Field Clinical Engineer. The NeuroPace Field Clinical Engineer will help you review
the neurostimulator configuration settings to determine the cause. An example interrogation report is
shown below in
Figure 77 Accessing an interrogation report that shows insufficient charge
Noise, Artifacts, Poor Signal Displayed, or No Signal Displayed in Live ECoG
Troubleshooting During an Intraoperative Procedure
1. If no ECoG signal is seen, make sure the recording montage has been programmed.
2. If the signal is too high in amplitude or saturating, decrease the gain setting.
3. If the leads are positioned over the RNS
®
Neurostimulator, move them away from the
neurostimulator.
4. Remove the connector cover from the RNS
®
Neurostimulator using the torque driver.
5. Flush the connector cover (with leads inserted) and the RNS
®
Neurostimulator connector
area with saline.
Top of detailed report shows alerts
Bottom of detailed report shows specific bursts delivered below programmed current levels
Select to open detailed report
Summary of Contents for PDMS 4340
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