Spinal nucleus extraction tool
First Claim
1. A tissue removal tool, comprising:
- an elongate tubular sheath, having a proximal end and a distal end;
an elongate shaft axially moveably positioned within the sheath, the shaft comprising a proximal shaft end and a distal shaft end;
a plurality of filaments carried by and axially extending distally beyond the distal end of the shaft;
wherein the filaments each comprise a proximal end and a free distal end, and at least one filament comprises a helical shape on the distal end;
wherein the filaments are moveable between a first, reduced cross sectional profile when the shaft is proximally retracted to position the filaments within the sheath, and a second, expanded cross sectional profile when the shaft is axially distally advanced with respect to the sheath, to expose the filaments beyond the distal sheath end, the filaments biased to overlap each other in the second profile and configured to entangle tissue fragments and to extract tissue fragments from a body cavity.
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0 Petitions
Accused Products
Abstract
Disclosed are surgical tools, tool sets and methods for percutaneously accessing and preparing treatment sites within the spine for subsequent treatment procedures. The treatment site may be an inter-vertebral motion segments in the lumbar and sacral regions of the spine. The tool set may comprise introducer tools and bone dilators for accessing and tapping into a targeted site, such as, for example, the anterior surface of the S1 vertebral body. The tool set may also comprise cutters and extractors for preparing the treatment site for subsequent treatment procedures. The tool set may additionally comprise a bone graft inserter, an exchange system, and/or a temporary distraction tool for further preparing the treatment site for subsequent treatment procedures.
434 Citations
34 Claims
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1. A tissue removal tool, comprising:
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an elongate tubular sheath, having a proximal end and a distal end; an elongate shaft axially moveably positioned within the sheath, the shaft comprising a proximal shaft end and a distal shaft end; a plurality of filaments carried by and axially extending distally beyond the distal end of the shaft; wherein the filaments each comprise a proximal end and a free distal end, and at least one filament comprises a helical shape on the distal end; wherein the filaments are moveable between a first, reduced cross sectional profile when the shaft is proximally retracted to position the filaments within the sheath, and a second, expanded cross sectional profile when the shaft is axially distally advanced with respect to the sheath, to expose the filaments beyond the distal sheath end, the filaments biased to overlap each other in the second profile and configured to entangle tissue fragments and to extract tissue fragments from a body cavity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A spinal tissue extraction tool, adapted for insertion into a target disc space, comprising:
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an elongate tubular sheath; an elongate shaft, having a proximal end and a distal end, movably positionable within the sheath; and a tissue extraction head axially extending distally beyond the distal end of the shaft; wherein the tissue extraction head comprises a plurality of overlapping nonparallel filaments comprising free distal ends biased radially-outwardly for entangling tissue fragments and for extracting tissue fragments from the target disc space, the plurality of filaments forming a core with a central hollow lumen formed by the plurality of filaments, wherein the filaments have a proximal end and a distal end, and at least one filament comprises a spiral shape on the distal end. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification