82 of 92 — 26-0008-1100/5
(Worldwide)
Physician’s Manual — VNS Therapy Programming Software (8.1)
Figure 44.
High Lead Impedance on a Diagnostic Test at
Follow-up Visit for Models 100, 101, and 102 Pulse
Generators
Error message encountered:
Lead Impedance “HIGH”
”A HIGH Lead Impedance has been detected...”
Perform a Systems Diagnostic*
1
and Normal Mode Diagnostics*
2
and record all results.
What does the “Near End of Service” read?
Systems Diagnostics
Results =
DC-DC code: 7
Output Status: LIMIT
Lead Impedance: HIGH
Normal Mode Results =
DC-DC code: 7
Output Status: LIMIT
Lead Impedance: HIGH
Possible Lead discontinuity,
Lead disconnection from the
Pulse Generator, fibrosis
between the nerve and
electrode, electrode detachment
from the nerve, or a defective
Pulse Generator.
Possible Lead
discontinuity, Lead
disconnection from the
Pulse Generator, fibrosis
between the nerve and
electrode, electrode
detachment from the
nerve, or defective Pulse
Generator. End of service
is pending. Replace the
Pulse Generator as soon
as possible.
Contact Cyberonics’ Clinical Technical
Support at
1 (866) 882-8804 (U.S. and
Canada) or +1 (281) 228-7330
(Worldwide)
.
YES
NO
Systems Diagnostics
Results =
DC-DC code: 4-7
Output Status: OK
Lead Impedance: HIGH
Normal Mode Results =
DC-DC code: 7
Output Status: LIMIT
Lead Impedance: HIGH
Possible Lead discontinuity,
Lead disconnection from the
Pulse Generator, fibrosis
between the nerve and
electrode, electrode
detachment from the nerve, or
a defective Pulse Generator.
Systems Diagnostics
Results =
DC-DC code: 0-3
Output Status: OK
Lead Impedance: OK
Normal Mode Results =
DC-DC code: 7
Output Status: LIMIT
Lead Impedance: HIGH
Generator cannot deliver
programmed output. Consider
reducing output current or
frequency and widening pulse
width.
Systems Diagnostics
Results =
DC-DC code: 0-3
Output Status: OK
Lead Impedance: OK
Normal Mode Results =
DC-DC code: 0-6
Output Status: OK
Lead Impedance: OK
Pulse Generator is delivering
output as intended.
