Document Reference: ENG-UMAN-000731
Revision: 5.00
Page 39 of 61
a.
Touch ‘Resume’
to continue changing current in the same direction.
b.
If current was increasing touch ‘Next’
to start the current
decreasing.
c.
Touch ‘Cancel’
to turn stimulation off and stop the Chronaxie and
Rheobase test.
After completion of the test the stimulation settings will return to their previous state.
Rheobase and Chronaxie calculation using the obtained data can be made using the Clinical
Data Viewer (CDV).
8.14.4
Conduction Velocity Test
This program can be used to automatically obtain a measurement of the velocity at which
elicited neural responses travel up or down the spinal cord. The program automatically
moves the measurement and reference electrode at a constant current level.
To perform a Conduction Velocity test:
1.
Choose the stimulation electrode configuration and settings that you wish test.
2.
Touch ‘Conduction Velocity’
from the neurophysiological measurement
menu.
3.
Touch ‘Fixed Reference’
for recording configurations in which the reference
electrode
is to remain fixed.
4.
Touch ‘Fixed Distance’
for recording configurations in which the reference
electrode
is to remain a fixed distance from the measurement electrode.
5.
Set the initial measurement electrode positions (see Figure 8.25):
a.
The measurement electrode is usually placed near the stimulation
electrodes (with a gap of 1 blank electrode)
b.
For Fixed Reference recordings, the reference electrode is usually placed on
the case electrode (E25), or on the end of the lead furthest from the
stimulation electrodes.
c.
For Fixed Distance recordings, and the reference electrode is placed 3 or 4
electrodes from the measurement electrode
