Positive fixation percutaneous epidural neurostimulation lead
First Claim
1. A neurological epidural lead having a proximal end and a distal end, the lead comprising:
- a body having at least two electrodes attached thereto near the distal end of the lead;
a connector attached at the proximal end of the lead;
wires connecting the electrodes to the connector;
an extension extending distally beyond the most distal electrode, the extension adapted to remain entirely within the epidural space of a spinal column, wherein the length of the extension corresponds to the length of at least one vertebral segment.
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Accused Products
Abstract
A neurological epidural lead is disclosed having an extension that extends distally beyond the most distal electrode. The length of the extension corresponds to the length of one ore more vertebral segments. The lead is placed in the epidural space so that the electrodes are positioned as desired. In positioning the electrodes, the extension passes through at least one area where the epidural space between the dura and the spinal canal wall is very narrow because the dura and spinal canal wall are in contact. As a result, the extension is held in place by contact with both the dura and spinal canal wall so that lateral lead migration of the electrodes is minimized.
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Citations
32 Claims
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1. A neurological epidural lead having a proximal end and a distal end, the lead comprising:
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a body having at least two electrodes attached thereto near the distal end of the lead; a connector attached at the proximal end of the lead; wires connecting the electrodes to the connector; an extension extending distally beyond the most distal electrode, the extension adapted to remain entirely within the epidural space of a spinal column, wherein the length of the extension corresponds to the length of at least one vertebral segment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A system for producing parasthesia in a patient comprising:
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a neurological epidural lead having a proximal end and a distal end, the lead comprising; a body having at least two electrodes attached thereto near the distal end of the lead; a connector attached at the proximal end of the lead; wires connecting the electrodes to the connector; an extension extending distally beyond the most distal electrode, the extension adapted to remain entirely in the epidural space of a spinal column, wherein the length of the extension corresponds to the length of at least one vertebral segment; and an implantable electrical pulse generator electrically connected to the wires.
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24. A method for anchoring a neurological epidural lead in the epidural space of a patient, the method comprising the steps of:
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providing a lead having a proximal end and a distal end, the lead having a body with at least two electrodes attached thereto near the distal end of the lead, a connector attached at the proximal end of the lead, wires connecting the electrodes to the connector and an extension extending distally beyond the most distal electrode for a distance corresponding to the length of at least one vertebral segment, the extension adapted to remain entirely in the epidural space of a spinal column; inserting the lead into a needle having a proximal and a patient contacting distal end, the extension being coterminous with the distal end of the needle; inserting the needle into a spinal column through a spinal canal wall; puncturing the ligamentum flavum with the needle to produce a small opening into the epidural space; pushing the lead out of the needle upward in the epidural space until the electrodes are in the desired location and the extension passes through at least one location in the epidural space where the dura and the spinal canal wall are in contact and wherein the distal end of the lead is retained entirely within the epidural space; removing the needle; whereby contact between the extension and the dura and spinal canal wall hold the extension in a fixed relation within the epidural space. - View Dependent Claims (25, 26)
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27. A neurological epidural lead having a proximal end and a distal end, the lead comprising:
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a body having at least two electrodes attached thereto near the distal end of the lead; a connector attached at the proximal end of the lead; wires connecting the electrodes to the connector; an extension extending distally beyond the most distal electrode, the extension adapted to remain entirely within the epidural space of a spinal column, wherein the length of the extension is approximately 9 to 90 millimeters in length. - View Dependent Claims (28, 29, 30)
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31. A method for anchoring a neurological epidural lead in the epidural space of a patient, the method comprising the steps of:
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providing a lead having a proximal end and a distal end, the lead having a body with at least two electrodes attached thereto near the distal end of the lead, a connector attached at the proximal end of the lead, wires connecting the electrodes to the connector and an extension extending distally beyond the most distal electrode for a distance of approximately 9 to 90 millimeters, the extension adapted to remain entirely in the epidural space of a spinal column; inserting the lead into a needle having a proximal and a patient contacting distal end, the extension being coterminous with the distal end of the needle; inserting the needle into a spinal column through a spinal canal wall; puncturing the ligamentum flavum with the needle to produce a small opening into the epidural space; pushing the lead out of the needle upward in the epidural space until the electrodes are in the desired location and the extension passes through at least one location in the epidural space where the dura and the spinal canal wall are in contact and wherein the distal end of the lead is retained entirely within the epidural space; removing the needle; whereby contact between the extension and the dura and spinal canal wall hold the extension in a fixed relation within the epidural space. - View Dependent Claims (32)
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Specification