NEEDLE HAVING MULTIPLE ELECTRODES
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United States of America Patent
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app pub date -
Jan 11, 2007
filing date -
May 18, 2004
priority date (Note) -
Abandoned
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Abstract
Embodiments of the invention generally relate to needles having more than one electrode and which are particularly suited for use in electromyography. One embodiment relates to a tripolar needle having three concentric electrodes. The tripolar needle is formed by providing a needle blank having first and second concentric electrodes and forming a third concentric electrode around the needle blank. The tripolar needle has an outer diameter which is substantially constant along the shaft of the needle, except at the tip, where the needle is sharpened.
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