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Physician’s Manual — VNS Therapy Programming Software (8.1)
7. If the Generator Diagnostics indicates “OK” Lead impedance, perform
these steps:
a.
Back out the setscrew(s) and remove the test resistor.
b. Insert the Lead connector pin(s) into the Lead receptacle(s) in the
Pulse Generator.
c.
Tighten the setscrew(s) until the hex screwdriver clicks.
d. Perform the System Diagnostics.
8. If the System Diagnostics continues to indicate “HIGH” Lead
impedance, contact LivaNova at 1 (866) 882-8804 (U.S. and Canada)
or +1 (281) 228-7330 (Worldwide).
10.3.3.
High Lead impedance on System Diagnostics in
OR – Pulse Generator replacement
High Lead Impedance can cause the error message, “Impedance is higher
than expected. Indicates a possible discontinuity of the lead, or fibrosis
between the nerve and lead.” High Lead impedance in the OR during
generator replacement can be attributed to several factors:
Incorrect connection of the Pulse Generator and Lead
Defective Lead
Defective Pulse Generator
To alleviate the condition, perform these steps (see Figure 40 on page 71):
1. Reinsert the connector pin(s) into the Lead receptacle(s).
a.
Back out the setscrew(s), remove the Lead pin(s), and leave the
hex screwdriver engaged in the setscrew(s).
b. Verify that the setscrew(s) is not visible in the Lead receptacle(s).
c.
Insert the connector pin(s) and tighten the setscrew(s) until the hex
screwdriver clicks.
d. Visually inspect the Lead receptacle(s) and verify that the Lead
pin(s) is past the back end of the connector block(s).
Note
: See the
physician’s manual for
the Pulse Generator.
e.
For the single-pin Model Pulse Generators, verify that the end of
the Lead connector ring is inside the Lead receptacle.
f.
Gently grasp and pull on the connector boot(s) to verify that the
pin(s) is securely tightened.
2. Rerun the System Diagnostics.
3. If “HIGH” Lead impedance is still noted, perform these steps:
a.
Remove the Lead connector pin(s) from the Lead receptacle(s).
b. Insert the connector pin(s) of the test resistor assembly into the
Lead receptacle(s) in the Pulse Generator.
