VNS Therapy SENTIVA M3000 Programmer Technical Manual page 75

LOW LEAD IMPEDANCE IN THE OR
If a System Diagnostics test results in low lead impedance, the following are
possible causes:
• Incorrect placement of the lead on the nerve
• Excessive irrigation of the nerve
• Defective generator or lead
• Short-circuit condition within the lead (during generator replacement
surgery)
Initial implant
Check the Lead
• Verify lead electrodes have been
correctly placed on the nerve
• Remove pooled fluid if nerve site
is saturated
• Retry System Diagnostics
Lead Impedance
Value?
Proceed with implant
Initial implant
Reinsert Lead into Generator
• 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
"Lead Impedance "LOW"
"OK"
Type of
implant?
Error Message
Type of
Implant?
Troubleshoot Generator
• Back out setscrew(s) and remove lead pin(s)
• Insert test resistor into generator and tighten
setscrew(s) with hex screwdriver until the
screwdriver clicks
MORE TROUBLESHOOTING
• Select
programmer
GENERATOR DIAGNOSTICS - START
• Select
the programmer
"Low"
"OK"
Contact LivaNova Technical Support
Generator replacement
Generator replacement
on the
on
Lead Impedance
Value?
"Low"
"Low"
Lead Impedance
Value?
"OK"
Proceed with implant
75