natus UltraPro S100, Руководство пользователя, Страница: 63 / 88

September 13, 2018 4-7
Performing an Exam
Select the exam
From the function keys or the Test/Study Menu, select the exam you want to use.
Select a protocol (only
if using Test Menu)
1. Use the mouse to select the nerve and tested side.
2. Press Enter to accept the selection.
3. If you do not find the desired protocol, select General Nerve .
4. When testing is completed, the nerve and site labels can be changed. Left
click the site to highlight it, then right-click and select Edit Segment .
Motor NCS electrode
placement
•
The active recording electrode is placed over the endplate zone of a muscle
innervated by the tested nerve.
•
The reference electrode is placed nearby in an electrically “quiet” area.
•
The ground electrode is usually placed between the stimulating and recording
electrodes.
•
Using electrolytic gel between the skin and recording electrode improves the
“electrical contact” and reduces noise.
•
Excessive noise may require abrading the skin to lower impedances.
Note: The recording electrode is placed on a muscle, even though the interest is in
the conduction along the nerve.
The nerve is stimulated using surface electrodes at two or more sites where the
nerve is located superficially. The stimulator is commonly oriented so that the
cathode of the stimulator faces the active recording electrode.