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Note: Negative lead offset values indicate that lead 1 (E1-E12) lies proximal to lead 2
(E13-E24). Positive values indicate that lead 1 lies distal to lead 2.
6. If the lead offset measurement is invalid, touch OK to restore the stimulation set
parameters.
7. Touch Continue to end the lead offset test.
8. Touch the Cancel button to close the neurophysiological measurements menu.
7.9 Additional impedance measurements
The CPA can be used for measuring the impedance between contacts:
1. Touch the CLS icon
Impedances. Two options will be available (see Section 8.4):
• All impedances: Measures the impedance between each pair of electrodes (i.e. E1
to E2, E1 to E3 ... E1 to E24, E2 to E3, etc.)
Note: This will take approximately 8 minutes.
• Load from file: Measure the impedances between electrodes specified in a '.csv' file.
Note: The file will be provided by Saluda Medical Field Clinical Engineer (FCE) if
required.
Note: The impedance measurement can be cancelled by pressing the 'Cancel' button
below the CLS Menu once measurement has started. This will save the measurements
collected so far.
The impedance measurements will be written to a '.JSON' file and saved in the 'Logs' folder for
the corresponding patient visit (see Section 7.7 for more details).
7.10 Patient Survey
Depending on the Patient Zone, a survey may be completed to document the patient's
demographics, pain history, and experience with SCS.
Note: The questions in the survey may vary between Patient Zones.
1. Touch the navigation menu icon
2. The patient must give consent for the clinician to collect the survey information and for
the information to be backed-up remotely on Saluda Medical servers.
3. Read the consent language to the patient and record the answer on the survey page
(Figure 7.15)
CLIN-UMAN-005175
Evoke® SCS System Clinical Manual
, then touch the More... field and select Measure
and then touch Survey.
Revision: 9.00
Page 57 of 101
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