Document Reference: ENG-UMAN-000731
Revision: 5.00
Page 30 of 61
Figure 8.15: A) ECAP Measurement and Current rolling plot; B) ECAP Measurement
Settings menu; C) Location of ECAP Measurement settings icon showing the Electrode
Display icon; D) Patient sensitivity graph.
3.
Touch ‘Apply’ to set the optimal Processing Offset
. The
open circle on the graph is the recommended offset (peak of graph), while the black
line is the offset setting in use.
4.
Touch ‘Apply’ to set the optimal Filter Frequency
. The
open circle on the graph is the recommended frequency (peak of graph), while the
black line is the frequency setting in use.
5.
The ECAP Measurement and Current rolling plot (Figure 8.15A) displays the ECAP
measurement (top) and current (bottom) over time.
8.10
Set up Feedback Control (FC) therapy
The settings for FC therapy vary between patients and for different electrode
configurations. Settings can be optimized in the ‘Measurement and Feedback Settings’
menu (Figure 8.15).
The settings for the FC therapy depend on the sensitivity of the ECAP to changes in current.
The CPA can measure ECAP sensitivity as the current is varied (see Figure 8.15D).
1.
Optimize the ECAP measurement.
2.
Increase current from near paresthesia threshold to a strong but comfortable level.
3.
The Sensitivity Graph will display the ECAP size data as a function of current (see
Figure 8.16).
B
A
C
D
