User Manual

10000891 REV A
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2. Conduct impedance testing. Refer to the Clinician Programmer Manual (P/N 10000906) for detailed
instructions. Do not tighten the setscrew on the extension until all the impedances are in the normal
range.
3. Check that the lead is fully inserted into the lead extension’s connector before tightening.
4. Fully insert the torque wrench into the setscrew.
5. Rotate the torque wrench handle to turn the lead extension connector’s setscrew clockwise until the
audible click is heard. The clicking indicates that it is fully tightened.
CAUTION: Use only the appropriate torque-limited torque wrench provided by Nevro Corp. to ensure that the
proper torque is applied to the setscrews and prevent overtightening.
4.5.5 Percutaneous Tunneling of the Extension
1. Assemble the tunneling tool by screwing in one of the tips on the end of the shaft. Make sure the straw is
on the shaft prior to screwing in the tip.
2. Plan the desired route of the tunnel and mark the route and the destination point at least 10-15 cm from
the incision.
3. Give appropriate local anesthetic along the tunneling route.
4. Create a small incision at the planned extension exit site.
5. Insert the tunneling tool from the lead insertion site and create a subcutaneous tunnel to the extension
exit site until the straw can be seen.
6. Hold the tunneling tip firmly and then unscrew and remove the tunneling tip. Take care not to drop the
tunneling tip.
7. Remove the tunneling tool while leaving the straw in the tunnel.
8. Insert the proximal end of the lead extension(s) through the straw.
9. Push the lead extension(s) until they come out of the straw’s other end.
10. Gently pull the extension(s) to get as much of the extension(s) that you need through the straw, and then
withdraw the straw from the exit site. It is recommended that a strain relief loop is left in the dorsal wound.
11. Make sure that the lead location has not changed.
NOTE: If the lead does not fully insert into the lead extension’s connector, check whether the setscrew is
impeding the progress of the lead. If it is, use the torque wrench to loosen the setscrew by turning it counter-
clockwise and then re-insert the lead. Ensure that the setscrew is not removed from the connector.
NOTE: If the setscrew does not tighten smoothly, use the torque wrench to loosen the setscrew by turning it
counter-clockwise and then re-tighten by turning it clockwise. Ensure that the setscrew is not removed from the
connector.