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Physician’s Manual — VNS Therapy Programming Software (8.1)
To alleviate the condition, perform these steps (see Figure 44 on page 82):
1. Interrogate the device.
2. Perform a System Diagnostics and record the results.
For the System Diagnostics, the Software automatically programs
the Pulse Generator to 1.0 mA, 500 micro sec, and 20 Hz. Patients
whose Pulse Generator output current is normally less than these
values may experience increased sensation, coughing, a flushed
face, or other effects. (See the physician’s manual for the Pulse
Generator, “Adverse Events” section.)
Note:
To obtain accurate
information from the
device diagnostics, the
Pulse Generator must be
programmed to a
minimum
of .75 mA, 15
Hz, and
at least
30
seconds ON time.
3. Perform a Normal Mode Diagnostics and record all the results.
If the System Diagnostics report Lead Impedance “HIGH”,
Output Status “LIMIT”, DCDC Converter “7” and the Normal
Mode Diagnostics reports Lead Impedance “HIGH”, Output
Status “LIMIT”, DCDC Converter “7” while
Near End of Service reads “NO”, then there is possible:
Lead discontinuity
Lead disconnection from the Pulse Generator
Fibrosis between the nerve and electrode
Electrode detachment from the nerve
Defective Pulse Generator
Near End of Service reads “YES”, then
Lead discontinuity
Lead disconnection from the Pulse Generator
Fibrosis between the nerve and electrode
Electrode detachment from the nerve
Defective Pulse Generator
End of Service is pending. Replace the Pulse Generator as
soon as possible.
If the System Diagnostics report Lead Impedance “HIGH”,
Output Status “OK”, DCDC Converter “4-7” and the Normal
Mode Diagnostics reports Lead Impedance “HIGH”, Output
Status “LIMIT”, DCDC Converter “7” while
Near End of Service reads “NO”, then the Pulse Generator
cannot deliever programmed output and there is possible:
Lead discontinuity
Lead disconnection from the Pulse Generator
Fibrosis between the nerve and electrode
Electrode detachment from the nerve
Defective Pulse Generator
