System and method for electrosurgical treatment of intervertebral discs
First Claim
1. A method for treating degenerative intervertebral discs comprising:
- positioning one or more active electrode(s) adjacent to an annular fissure on the inner wall of the annulus fibrosis of an intervertebral disc;
positioning one or more return electrode(s) in the vicinity of the active electrode(s) in or around the intervertebral disc;
completing a current path between the active and return electrodes using an electrically conductive fluid; and
applying a sufficient high frequency voltage difference between the active and return electrodes to shrink the collagen fibers in the annular fissure.
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Accused Products
Abstract
Systems, apparatus and methods for ablation, resection, aspiration, collagen shrinkage and/or hemostasis of tissue and other body structures in open and endoscopic spine surgery. In particular, the present invention includes a channeling technique in which small holes or channels are formed within spinal discs, and thermal energy is applied to the tissue surface immediately surrounding these holes or channels to cause thermal damage to the tissue surface, thereby stiffening the surrounding tissue structure and for reducing the volume of the disc to relieve pressure on the surrounding nerves. High frequency voltage is applied between one or more active electrode(s) and one or more return electrode(s) to volumetrically remove or ablate at least a portion of the disc tissue, and the active electrode(s) are advanced through the space left by the ablated tissue to form a channel, hole, divot or other space in the disc tissue. In addition, the high frequency voltage effects a controlled depth of thermal heating of the tissue surrounding the hole to thermally damage or create a lesion within the tissue surrounding the hole to debulk and/or stiffen the disc structure, thereby relieving neck or back pain.
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Citations
12 Claims
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1. A method for treating degenerative intervertebral discs comprising:
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positioning one or more active electrode(s) adjacent to an annular fissure on the inner wall of the annulus fibrosis of an intervertebral disc;
positioning one or more return electrode(s) in the vicinity of the active electrode(s) in or around the intervertebral disc;
completing a current path between the active and return electrodes using an electrically conductive fluid; and
applying a sufficient high frequency voltage difference between the active and return electrodes to shrink the collagen fibers in the annular fissure.
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2. A system for treating intervertebral discs comprising:
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an electrosurgical instrument having a shaft with a proximal end portion and a distal end portion;
an electrode assembly comprising at least one active electrode positioned on the distal end portion of the shaft, and at least one return electrode positioned on the shaft and axially spaced from the active electrode;
a coagulation electrode; and
a high frequency power supply coupled to the active, return and coagulation electrodes, the power supply being capable of applying a first high frequency voltage difference between the active and return electrodes sufficient to ablate tissue, and a second high frequency voltage difference between the return electrode and the coagulation electrode sufficient to coagulate blood and insufficient to ablate tissue. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification