Technique for design, and placement, of a subdermal Ag—Ag/Cl biopotential electrode
First Claim
1. A wire electrode for measuring biopotentials in a subdermal layer, said electrode comprising a pure multi-stranded or solid silver wire, said wire being insulated and having an uninsulated distal end, the uninsulated distal end of said wire being at least 3 mm in length and coated with silver/chloride, a proximal end of said wire being operatively coupled to a biopotential recording device.
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Abstract
A chronic subdermal silver-silver/chloride (Ag—Ag/Cl) electrode for the recording of biopotentials is disclosed. The electrode is comprised of an Ag—Ag/Cl distal end that is placed subdermally by various methods. The recording electrode is made of solid, multi-stranded or a ball of pure silver and the whole length of the electrode is insulated except for the distal end which is used for voltage recordation. The electrode can be placed subdermally by an introducer apparatus such as hypodermic or sewing needle, a split-cannula, a staple, or a suture. Once placed, the introducer apparatus can be removed leaving the recording wire/element in place. The recording electrode can be placed at any location on the body to record the local biopotential (EEG, EOG, EMG, EKG, etc). It can be left in place for hours, days, or weeks, as it will record without any further adjustment.
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Citations
14 Claims
- 1. A wire electrode for measuring biopotentials in a subdermal layer, said electrode comprising a pure multi-stranded or solid silver wire, said wire being insulated and having an uninsulated distal end, the uninsulated distal end of said wire being at least 3 mm in length and coated with silver/chloride, a proximal end of said wire being operatively coupled to a biopotential recording device.
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11. An electrode device for introducing a wire electrode in a subdermal layer and measuring biopotentials therein, said electrode device comprising:
- a wire electrode comprising a pure multi-stranded or solid silver wire, said wire being insulated and having an uninsulated distal end, the uninsulated distal end of said wire being at least 3 mm in length and coated with silver/chloride, a proximal end of said wire being operatively coupled to a biopotential recording device, an introducer needle for introducing the distal end of the wire in the subdermal layer, said introducer needle comprising a needle hub and a hollow needle extending therefrom, said hollow needle being at least 25 gauge, whereby the wire is hooked into a needle lumen of the hollow needle at the distal end of the wire and the wire is folded back along the length of the hollow needle to carry the distal end of the wire into the subdermal layer.
- View Dependent Claims (12, 13, 14)
Specification