Evoke
®
SCS System Clinical Manual
CLIN-UMAN-005175
Revision: 9.00
Page 71 of 101
Figure 9.1: Connect the proximal end of the intraoperative cable to the eCLS. Port 2
(electrodes 13–24) is shown here. Port 1 (electrodes 1-12) is on the opposite side of the eCLS.
9.2
Confirm optimal lead placement
Physicians may have a preference on the method to confirm optimal lead placement in the
operating room. Lead position may be confirmed anatomically, incorporating ECAP
measurement, and/or through paresthesia mapping using intraoperative patient feedback.
Physicians may use one or more of the following methods to confirm medio-lateral lead
location, dermatomal coverage, ability to measure ECAPs, and/or paresthesia coverage of the
pain areas:
• If confirmation of optimal lead placement will be based on ECAP measurement, go to
Section 9.2.1.
• If paresthesia mapping is to be performed, go to Section 9.2.2.
9.2.1
ECAP measurement
This section is to be completed by the programming clinician outside of the sterile field. Refer
to Section 6 for detailed programming instructions.
1. Connect the CI to the eCLS.
2. Check electrode impedances using the CPA to ensure the leads are connected properly.
•
If any electrode has an impedance measurement that is greater than 4000 Ω,
check all the connections.
•
Check impedances after each reconnection
3. Select the stimulation and measurement electrodes and settings.
4. Verify that an ECAP can be measured by stimulating, for example, at the top and bottom
of the lead
•
If the ECAP measured is not satisfactory, change the electrodes, stimulation or
measurement settings using the CPA or ask the surgeon to move the
