Noraxon U.S.A., Inc.
TeleMyo 2400T V2
Use of Disposable Electrodes
While the TeleMyo 2400T can operate with reusable electrodes, it is most commonly used with disposable
surface electrodes. Any good quality silver/silver chloride electrode is acceptable. Noraxon provides
several types of quality disposable electrodes for a wide variety of sEMG applications. It is recommended
that any electrodes used with the TeleMyo 2400T satisfy the requirements for standard ANSI/AAMI EC12-
1991 Disposable ECG electrodes.
Because disposable electrodes have a shelf life, it is important not to use
expired parts. Bulk disposable electrodes come packaged in a sealed
container or bag. The expiration date can be found printed on the package
container. After the sealed bulk container is opened, the remaining
electrodes should be used before their gel begins to dry out. Always keep
the remaining electrodes in their bulk package until they are used. Avoid
using electrodes that are randomly found lying outside of their bulk
packaging as their expiration date is uncertain and their gel has been
exposed to accelerated drying.
Be aware that when disposable electrodes are removed, some individuals
may notice a faint red skin discoloration over the site previously occupied
by the electrode. This skin discoloration is typically benign and temporary
and may be due to a mild allergic reaction to the adhesive or simply be a
slight abrasion caused by peeling away the tape. It will usually disappear
within 24 hours.
Noraxon discourages any attempt to reuse a disposable electrode, even if it is simply pulled off to slightly
reposition the electrode’s muscle placement. Noraxon strongly recommends against the use of dried out
electrodes that are re-wetted with electrode gel.
Electrode Application Guidelines and Facts
1.
If the subject has a fair amount of hair at the electrode application site, the hair should be clipped.
Shaving is not necessary and may irritate the skin.
2.
The electrode application site should be clean and dry. The preferred method of cleaning is with soap
and water plus drying the skin with a dry cloth. Dry skin contributes to good electrode adhesion and
good trace quality.
3.
Cleaning with isopropyl alcohol should be avoided or limited to situations where electrode adhesion is
an issue (diaphoresis, excessively oily or lotion covered skin), since it may dehydrate the skin thereby
causing skin impedance to increase. If alcohol is used, allow it to dry prior to electrode application.
4.
Attach the lead wire to the electrode prior to placing the electrode on the skin. This will eliminate the
potential for discomfort if snap lead wires are pressed onto the electrode after the electrode has been
applied.
5.
Electrode application sites should be abraded to lower the skin impedance. Abrasion patches can be
found on most electrodes. Simply draw the abrasion patch several times over the skin of the intended
application site.
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