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Physician’s Manual — VNS Therapy Programming Software (8.1)
Figure 40.
High Lead Impedance on System Diagnostic Test
in OR - Initial Implant or Generator Replacement
Error message encountered:
“A HIGH Lead impedance has been detected...”
Lead Impedance “HIGH”
Back out setscrew(s), remove Lead pin(s), and leave the hex screwdriver engaged in setscrew(s).
Verify that the setscrew(s) is not visible in the Lead receptacle(s).
Insert connector pin(s) and tighten setscrew(s) until the hex screwdriver clicks.
Visually inspect the Lead receptacle(s) and verify that the Lead pin(s) is past the back end of the connector block.
For single-pin model Pulse Generators, verify that the end of the connector ring is inside of the Lead receptacle.
For
Initial Implant
only: If nerve site is dry, irrigate nerve and remove pooled fluid.
Retry System Diagnostics.
System Diagnostics Results
Back out setscrew(s) and remove Lead pin(s).
Insert test resistor into Pulse Generator and tighten setscrew(s) with hex
screwdriver until the screwdriver clicks (resistor is packaged with generator).
On the Computer select
Other Diagnostics
.
Select
Generator Diagnostics
.
Proceed with implant.
Contact Cyberonics’ Clinical Technical
Support at
1 (866) 882-8804 (U.S. and
Canada) or +1 (281) 228-7330 (Worldwide)
.
“OK” Lead Impedance
“HIGH” Lead
Impedance
Back out setscrew(s) and remove test resistor.
Verify the setscrew(s) is not visible in the Lead receptacle(s).
Engage the hex screwdriver in the setscrew(s).
Insert connector pin(s) and tighten setscrew(s) until the hex
screwdriver clicks.
Visually inspect the Lead receptacle(s) and verify that the Lead
pin(s) is past the back end of the connector block(s).
Retry System Diagnostics.
“HIGH” Lead Impedance
“OK” Lead Impedance
System Diagnostics Results
Proceed with implant.
“HIGH” Lead Impedance
“OK” Lead Impedance
Generator Diagnostics Results