| No. |
color |
length (mm) |
length
(inches) |
caliber (mm) |
Gauge |
| 743 25-36/40 | grey |
25 | 1" | 0.36 | 28G |
| 743 38-36/40 | chartreuse |
38 | 1.5" | 0.36 | 28G |
| 743 38-45/40 | green |
38 | 1.5" | 0.45 | 26G |
| 743 50-45/40 | yellow |
50 | 2" | 0.45 | 26G |
| 743 75-50/40 | red |
75 | 3" | 0.50 | 25G |
Is
there any difference
in the recording quality between concentric and monopolar needles?
Yes, there is a difference in the recording characteristics between a concentric and a monopolar needle.
In the concentric design the electrode wire is located inside the lumen of the cannula and thereby shielded, giving a more stable baseline. The cannula shields the wire from picking up potentials from fibers located behind the tip. The sensitivity of the concentric EMG needle is therefore largest in the hemisphere facing the oblique elliptical surface.
Due to the asymmetric sensitivity function, the wave shape of the recorded potentials will vary if the electrode is rotated about its axis.
This problem is not observed with the asymmetric monopolar EMG needle. However, this electrode has a more unstable baseline (noise) due to the unshielded lead wire and the remote location of the reference electrode. It is thus more likely to pick up potentials from remote motor units.
| No. |
color |
length (mm) |
length
(inches) |
caliber (mm) |
Gauge |
recording
area mm2 |
| 740 25-30/25 | white |
25 | 1" | 0.30 | 30G | 0.02 |
| 740 25-45/25 | grey |
25 | 1" |
0.45 |
26G |
0.07 |
| 740 30-35/25 | violet |
30 |
1.2" |
0.35 |
28G |
0.02 |
| 740 38-45/25 | green |
38 |
1.5" |
0.45 |
26G |
0.07 |
| 740 50-45/25 | yellow |
50 |
2" |
0.45 |
26G |
0.07 |
| 740 75-65/25 | red |
75 |
3" |
0.65 |
23G |
0.07 |
EEG
disc electrodes
feature a 2mm hole in the top for electrolyte injection.
Color-coded lead wires come in standard 120cm (48 in) length.
Packaged in sets of 10 electrodes. Gold plated.
DISPOSABLE EEG DISC ELECTRODES
Disposable
EEG
electrodes eliminate need to clean, maintain, and store after each
use. No more troubleshooting worn electrodes. The
silver/silver chloride sensor and tangle free wires result in
consistently high signal quality 100% of the time. Unpack, use,
and discard electrodes saving time on every study. 150 mm
lead, 10 per pak. One-time use only.
EEG interpretation is a critical skill for most practicing neurologists, as well as for an increasing number of specialists in other practice settings. Handbook of EEG Interpretation, the first illustrated, portable handbook to discuss all aspects of clinical neurophysiology, is an essential means of quick reference for anyone involved in EEG interpretation. Handbook of EEG Interpretation provides practical information on reading EEGs by juxtaposing actual EEGs with bullet points of critical information, making it an essential neurophysiology reference for use during bedside, OR, ER, and ICU EEG interpretation. At once more concise, illustrative, and portable than other texts on EEG, Handbook of EEG Interpretation fits in a labcoat pocket, providing immediate information for anyone involved in EEG interpretation. It is a useful tool for all residents, fellows, and clinicians in neurology as well as many internists, psychiatrists, neurosurgeons, anesthesiologists, ICU staff, ER staff, EEG technologists, and nurses. The book's seven main sections cover normal, abnormal, and epileptiform EEG patterns, as well as seizures, patterns of special significance (e.g., stupor and coma), polysomnography, and neurophysiologic intraoperative monitoring.
10-20 International lead placement
reference chart
No. 10-20, $15
