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|Spanish to English translations [PRO]|
Science - Medical (general) / EEG
|Spanish term or phrase: montajes reformados bipolares|
|This is from an EEG report written in Spain: |
"REGISTRO EEG: mediante sistema internacional 10-20, en adquisición digital de referencia común con **montajes reformados bipolares**."
How do I best say this phrase in English?
|English translation:modified bipolar electrode assembly|
Montages does not exist in English and is not the term used, sorry! I would use this term, please see references below.
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Local time: 18:11
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modified bipolar (electrode) montages
Practical aspects of EEG monitoring in critical care
Tarja Sivonen, RN
The electroencephalogram (EEG) is becoming more popular as a tool to detect changes in neurological functions and to predict the outcome of a patient in the intensive care unit.
The EEG is usually one of the first to detect when something happens in the patient’s condition. At first, the changes are often reversible, and with this early intervention, irreversible damage can sometimes be prevented.
For example, non- convulsive seizures are much more common in the ICU than was previously believed. With an EEG, non-convulsive seizures can be detected and the response to care can be followed.
The standardized placement of scalp electrodes for a classical EEG recording has become common since the adoption of the International 10-20 system. The essence of this system is the distance in percentages of the 10-20 range between Nasion - Inion and fixed points. These points are marked as the frontal pole (Fp), central (C), parietal (P), occipital (O), and temporal (T). The midline electrodes are marked with a subscript z, which stands for zero. The odd numbers are used as subscript for points over the left hemisphere, and the even numbers over the right.
When monitoring the EEG, lead positioning is not as important as in a diagnostic EEG, during which the electrodes would have to be exactly on the right spot over the skull. If a patient has a wound or a bandage placed so that the exact electrode placement cannot be achieved, the nearest possible location should be used. However, it is essential that the electrodes should be placed symmetrically toward the central line. This way, the EEG signal over the different hemispheres can be compared.
Montage means the placement of the electrodes. The EEG can be monitored with either a bipolar montage or a referential one. Bipolar means that you have two electrodes per one channel, so you have a reference electrode for each channel. The referential montage means that you have a common reference electrode for all the channels.
Different kinds of electrodes can be used for monitoring EEG. The stick-on electrodes are easy to use and attach on hairless areas. For hairy areas, Ag/AgCl- or gold cups can be attached by using paste or colloidin. This takes time and is more difficult than using the stick-on electrodes. Needle-electrodes are faster to attach on hairy areas, but the impedance may be quite high causing more artefacts to the EEG signal. In a diagnostic EEG, electrode-caps are sometimes used for saving time.
The biggest challenge with monitoring EEG is artifact recognition and elimination. There are patient related artifacts (e.g. movement, sweating, ECG, eye movements) and technical artifacts (50/60Hz artifact, cable movements, electrode paste related) which have to be handled differently. There are some tools for finding the artifacts. For example, FEMG and impedance measurements can be used for indicating contaminated signal. By looking at different parameters on a monitor, other interference may be found.
There are things that can be done for reducing the artefacts in the ICU:
Make sure that the impedance values are as low as possible (< 5 kOhm). Prepping the skin properly and using the correct amount of paste can do this. Also, all the electrodes used should be similar.
Remember to attach the ground electrode and follow the FEMG value (sometimes it is necessary to sedate and relax the patient)
Use bipolar montage if you have an electrically controlled bed, because referential montage is more prone to artefacts
Keep the electrical device as far away from the patient's head as possible
Keep the pre-amplifier as close to the patient's head as possible and the cables as short as possible, or braid the cables
Enno Freye. Cerebral Monitoring in the Operating Room and the Intensive Care Unit. 1990
Harvey L. Edmonds, Albert Wanquier. Computerized EEG Monitoring in Anesthesia and Critical Care. 1986
Note added at 23 mins (2005-12-26 20:08:06 GMT)
Lo copiado fue extraído de la web que cito. Es la primera vez que veo algo así como "reformado" (traduje un libro de neurocirugía y dos de neurorradiología), pero a mi entender tu frase quiere decir que respeta la norma (International 10-20 System) pero alguno de los electrodos está colocado distinto de lo especificado en esa norma. Espero que te ayude.
Local time: 14:11
Specializes in field
Native speaker of: Spanish
PRO pts in category: 24
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|Changes made by editors|
|Dec 26, 2005 - Changes made by Walter Landesman:|
|Language pair||English to Spanish » Spanish to English|| |
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