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(Worldwide)
Physician’s Manual — VNS Therapy Programming Software (8.1)
10.3.4.
Low Lead impedance on System Diagnostics in
OR – initial implant
Low Lead impedance (
≤
600 Ohms) in the OR can be attributed to several
causes:
Incorrect placement of the Lead on the nerve
Excessive irrigation of the nerve
Defective Lead
Defective Pulse Generator
To alleviate the condition, perform these steps (see Figure 41 on page 73):
1. Verify that the Lead electrode(s) has been correctly placed on the
vagus nerve.
2. If the nerve site is heavily saturated, remove pooled fluid.
3. Rerun the System Diagnostics.
4. If “LOW” 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.
c.
Tighten the setscrew(s) until the hex screwdriver clicks.
d. Perform the Generator Diagnostics.
If the Generator Diagnostics indicates “LOW” Lead
impedance, call LivaNova at 1 (866) 882-8804 (U.S. and
Canada) or +1 (281) 228-7330 (Worldwide).
If the Generator Diagnostics indicates “OK” Lead impedance,
perform these steps:
1) Back out the setscrew(s) and remove the test resistor.
2) Insert the Lead connector pin(s) into the Lead
receptacle(s) in the Pulse Generator.
3) Tighten the setscrew(s) until the hex screwdriver clicks.
4) Perform the System Diagnostics.
If the System Diagnostics continues to indicate “LOW” Lead
impedance, contact LivaNova at 1 (866) 882-8804 (U.S. and
Canada) or +1 (281) 228-7330 (Worldwide).
