Evoke
®
SCS System Clinical Manual
CLIN-UMAN-005175
Revision: 9.00
Page 40 of 101
Figure 7.3: Current steering: 50:50 (%) on the left and 70:30 (%) on the right.
7.4
Measurement electrode scan
The measurement electrode scan allows ECAPs from multiple electrode configurations to be
displayed on the ECAP display (7.4.1.1) at the same time. It is intended to assist in optimizing
the choice of measurement electrodes and settings. By default, the measurement electrode
scan will be automatically started when stimulation is started.
The measurement electrode scan consists of up to four measurement electrode configurations:
the configuration selected by the user and 1 to 3 other configurations. The configurations used
in the scan are displayed in the measurement electrode scan window (Figure 7.4) along with
the Signal Quality Indicator (SQI, see Section 7.4.2)
The electrodes used in the scan are based on the location of the stimulation, measurement and
reference electrodes that are selected in the electrode display window (Figure 6.2). See Section
7.4.3 for the methods used to choose the scan electrodes.
Note:
To perform a Measurement Electrode Scan:
•
The selected stimulation, measurement, and reference electrodes must be
on the same lead.
•
Only 1 stimulation electrode must be selected.
•
The measurement electrode must not be adjacent to the stimulation or
return electrode.
•
The reference electrode must not be on the case (E25)
•
The measurement electrode must be between the stimulation and reference
electrodes
A)
B)
