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Physician’s Manual — VNS Therapy Programming Software (8.1)
10.3.6.
Low Battery/End of Service indications prior to
surgery, outside of the sterile field – initial
implant or Pulse Generator replacement
Low storage temperatures may affect the battery status indicators. Battery
indicators include any of the following:
Intensified Follow-up Indicator (IFI) = Yes, Near End of Service (N
EOS) = Yes, or End of Service (EOS) = Yes
Warning message - "The Intensified Follow-up Indicator (IFI) has
been set for the Pulse Generator. More frequent clinical monitoring is
recommended. If you have any questions, please consult the
Physician's Manual or contact Cyberonics."
Warning message - "The Pulse Generator is nearing End of Service (N
EOS). It is recommended that the Pulse Generator be replaced as soon
as possible. If you have any questions, please consult the Physician's
Manual or contact Cyberonics."
Warning message - "The Pulse Generator has reached End of Service
(EOS) and is NOT supplying stimulation. It is recommended that the
Pulse Generator be replaced immediately. If you have any questions,
please consult the Physician's Manual or contact Cyberonics."
Warning message - “The Pulse Generator is currently disabled due to a
Vbat < EOS threshold. Note that the generator is NOT supplying
stimulation. It is recommended that you contact Cyberonics or refer to
the Physician’s Manual.”
The potential causes for receiving any of these battery indications on a new
device with output current set at “0 mA” are as follows:
Interrogated Pulse Generator has been exposed to low storage
temperatures within the last 24 hours
Defective Pulse Generator
To update the battery status indicators perform the following steps with the
device in the sterile package (see Figure 43 on page 76):
Note: Ignore Lead
Impedance status and
Impedance Value.
1. Place the Wand over the packaged Pulse Generator and perform a
System Diagnostics or Generator Diagnostics.
2. Verify that the battery level indication from Diagnostic Information
screen is IFI = No.
3. If any one of the battery level indicators (IFI, N EOS, EOS) is set to
YES, or any other battery level warning message appears, wait 30
minutes and retry the diagnostic.
4. If the problem persists, contact LivaNova at 1 (866) 882-8804 (U.S.
and Canada) or +1 (281) 228-7330 (Worldwide).
