DEVICE FOR RESECTING SPINAL TISSUE
First Claim
Patent Images
1. A device for excising tissue, comprising:
- an outer sleeve;
an inner tubular member slidingly received within the outer sleeve;
a cutting head on a distal end of the inner tubular;
wherein the cutting head comprises at least three arms extending axially from the inner tubular;
wherein the device has an open position in which the cutting head extends from the outer sleeve, and a closed position in which the cutting head is at least partially disposed within the sleeve; and
wherein the arms are biased away flom each other when the device is in the opened position.
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Abstract
A device for excising tissue. In an embodiment, the device comprises an outer sleeve. In addition, the device comprises an inner tubular member slidingly received within the outer sleeve. Further the device comprises a cutting head connected to a distal end of the inner tubular, wherein the cutting head comprises at least three aims extending axially from the inner tubular. Still further, the device has an open position in which the cutting head extends from the outer sleeve, and a closed position in which the cutting head is at least partially disposed within the sleeve.
214 Citations
17 Claims
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1. A device for excising tissue, comprising:
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an outer sleeve;
an inner tubular member slidingly received within the outer sleeve;
a cutting head on a distal end of the inner tubular;
wherein the cutting head comprises at least three arms extending axially from the inner tubular;
wherein the device has an open position in which the cutting head extends from the outer sleeve, and a closed position in which the cutting head is at least partially disposed within the sleeve; and
wherein the arms are biased away flom each other when the device is in the opened position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for treating stenosis in a spine of a patient having a median plane, the spine including a spinal canal having a posterior surface, a dural sac and an epidural space between the posterior surface and dural sac, the location of the stenosis determining a region of interest in the spine, comprising the steps of:
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a) positioning a tissue excision device adjacent the region of interest, wherein the tissue excision device comprises;
an outer sleeve;
an inner tubular member slidingly received within the outer sleeve;
a cutting head connected to a distal end of the inner tubular;
wherein the cutting head comprises at least three arms extending axially from the inner tubular;
wherein the device has an open position in which the cutting head extends from the outer sleeve, and a closed position in which the cutting head is at least partially disposed within the sleeve. b) opening the tissue excision device by extending the cutting head from the outer sleeve;
c) inserting the tissue excision device into tissue in the region of interest;
d) closing the tissue excision device by advancing the outer sleeve over the cutting head; and
e) retracting the tissue excision device from the tissue in the region of interest. - View Dependent Claims (14, 15, 16)
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17. A kit for performing a procedure on a spine, the spine including an epidural space containing a dural sac, the lit comprising:
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an insertion member for accessing the epidural space;
a volume of a contrast medium adapted to be inserted into the epidural space by the insertion member and expanded so as to compress a portion of the thecal sac and provide a safety zone within the epidural space; and
a tissue excision device comprising;
an outer sleeve;
an inner tubular member slidingly received within the outer sleeve;
a cutting head connected to a distal end of the inner tubular;
wherein the cutting head comprises at least three arms extending axially from the inner tubular;
wherein the device has an open position in which the cutting head extends from the outer sleeve, and a closed position in which the cutting head is at least partially disposed within the sleeve.
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Specification