Evoke
®
SCS System Clinical Manual
CLIN-UMAN-005175
Revision: 9.00
Page 56 of 101
To estimate the lead offset:
1.
Touch
Lead Offset
from the neurophysiological measurement menu.
Note:
Ensure that only the applied stimulation set is enabled before continuing (see
Section 7.5). The lead offset test will save the stimulation set parameters before the test
and restore them after the test.
2.
Touch
Start
to start the lead offset measurement.
Note:
During the test, stimulation will be turned on at 0.5 mA with 200 µs pulse width,
which is typically not felt by the patient.
If necessary touch the
Stop
button
to stop the stimulation at any time and cancel
the lead offset test.
3.
Wait for the measurements to complete. The test will cycle through up to 6 stimulation
locations, until the lead offset can be confidently calculated.
Note:
You may stop the lead offset test at anytime by touching the
Cancel
button
.
The results for stimulation locations with completed measurements will be plotted (see
Figure 7.14), but the lead offset result will be invalid.
4.
After completion, the results of all lead offset measurements will be plotted (Figure
7.14) and the lead offset distance displayed.
Figure 7.14 Lead offset measurement plot and lead offset distance display. The peak of the
plot indicates the lead offset distance (electrode spacings).
5.
If the lead offset measurement is valid, touch
Yes
to move the leads based on the
measured offset, otherwise touch
No
to continue without adjusting the lead display. The
stimulation set parameters will be restored.
