Percutaneous access devices and bone anchor assemblies
First Claim
1. A percutaneous access device comprising:
- an inner tube having a proximal end, a distal end, and a lumen extending between the proximal end and the distal end, the inner tube having a first slot formed therein, the first slot opening at the distal end of the inner tube and extending a first slot length toward the proximal end of the inner tube; and
an outer tube disposed about at least a portion of the inner tube, the outer tube having a proximal end, a distal end, and a lumen extending between the proximal end and the distal end, the outer tube being sized to span from at least a skin incision in a patient to a predetermined site proximate the spine of the patient, the outer tube having a second slot formed therein, the second slot opening at the distal end of the outer tube and extending a second slot length toward the proximal end of the outer tube, the distal end of the outer tube being adapted to releasably engage a bone anchor, the inner tube being adjustable relative to the outer tube along the longitudinal axis of the outer tube between a first position and a second position in which the distal end of the inner tube contacts the bone anchor.
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Accused Products
Abstract
A percutaneous access device includes an inner tube and an outer tube disposed about at least a portion of the inner tube. The outer tube may be sized to span from a skin incision in a patient to a site proximate the spine of the patient. The distal end of the outer tube may be adapted to releasably engage a bone anchor. The inner tube may be adjustable relative to the outer tube between a first position and a second position in which the distal end of the inner tube contacts the bone anchor. A bone anchor assembly includes a bone anchor having a distal bone engaging portion and a receiving member having a recess for receiving a spinal fixation element. The proximal end of the receiving member may have an arcuate groove formed on an exterior surface thereof to facilitate connection of an instrument to the receiving member.
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Citations
20 Claims
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1. A percutaneous access device comprising:
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an inner tube having a proximal end, a distal end, and a lumen extending between the proximal end and the distal end, the inner tube having a first slot formed therein, the first slot opening at the distal end of the inner tube and extending a first slot length toward the proximal end of the inner tube; and an outer tube disposed about at least a portion of the inner tube, the outer tube having a proximal end, a distal end, and a lumen extending between the proximal end and the distal end, the outer tube being sized to span from at least a skin incision in a patient to a predetermined site proximate the spine of the patient, the outer tube having a second slot formed therein, the second slot opening at the distal end of the outer tube and extending a second slot length toward the proximal end of the outer tube, the distal end of the outer tube being adapted to releasably engage a bone anchor, the inner tube being adjustable relative to the outer tube along the longitudinal axis of the outer tube between a first position and a second position in which the distal end of the inner tube contacts the bone anchor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A percutaneous access device comprising:
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an inner tube having a proximal end, a distal end, and a lumen extending between the proximal end and the distal end, the inner tube having a first slot formed therein, the first slot having an opening at the distal end of the inner tube and extending a first slot length toward the proximal end of the inner tube; and an outer tube coaxially disposed about at least a portion of the inner tube, the outer tube having a proximal end, a distal end, and a lumen extending between the proximal end and the distal end;
the outer tube being sized to span from at least a skin incision in a patient to a predetermined site proximate the spine of the patient, the distal end of the outer tube being adapted to releasably engage a bone anchor, the outer tube having an outer diameter proximate the distal end of the outer tube that is less than or equal to an outer diameter of a receiving portion of the bone anchor, the outer tube having a second slot formed therein aligned with the first slot, the second slot having an opening at the distal end of the outer tube and extending a second slot length toward the proximal end of the outer tube, the inner tube being movable along the longitudinal axis of the outer tube. - View Dependent Claims (13, 14, 15)
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16. A medical device comprising:
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a percutaneous access device comprising an inner tube having a proximal end, a distal end, and a lumen extending between the proximal end and the distal end; and an outer tube disposed about at least a portion of the inner tube, the outer tube having a proximal end, a distal end, and a lumen extending between the proximal end and the distal end;
the outer tube being sized to span from at least a skin incision in a patient to a predetermined site proximate the spine of the patient; anda bone anchor assembly comprising; a bone anchor having a proximal head and a distal bone engaging portion; and a receiving member coupled to the bone anchor, the receiving member having a proximal end, a distal end and a recess for receiving a spinal fixation element, the proximal end of the receiving member having a pair of arcuate grooves formed on an exterior surface thereof, wherein the distal end of the outer tube includes a pair of opposed tabs, each tab having a radially inward projection that is sized and shaped to seat within one of the arcuate grooves formed in the receiving member of a bone anchor. - View Dependent Claims (17)
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18. A medical device comprising:
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a percutaneous access device comprising an inner tube having a proximal end, a distal end, and a lumen extending between the proximal end and the distal end, the inner tube having a first slot formed therein, the first slot having an opening at the distal end of the inner tube and extending toward the proximal end of the inner tube, and an outer tube coaxially disposed about at least a portion of the inner tube, the outer tube having a proximal end, a distal end, and a lumen extending between the proximal end and the distal end, the outer tube being sized to span from at least a skin incision in a patient to a predetermined site proximate the spine of the patient, the outer tube having a second slot formed therein aligned with the first slot, the second slot having an opening at the distal end of the outer tube and extending toward the proximal end of the outer tube; and a bone anchor assembly comprising a bone anchor having a proximal head and a distal bone engaging portion, and a receiving member having a proximal end having a first bore, a distal end opposite the proximal end and having a second bore, and a recess for receiving a spinal fixation element and in communication with the first bore, the second bore being sized to receive the head of the bone anchor, wherein the distal end of the outer tube is releasably engaged to the receiving member and the first and second slots are aligned with the recess in the receiving member when the outer tube is releasably engaged to the receiving member. - View Dependent Claims (19, 20)
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Specification