MINIMALLY INVASIVE INSTRUMENT SET, DEVICES, AND RELATED METHODS

• US 20190008565A1
• Filed: 09/10/2018
• Published: 01/10/2019
• Est. Priority Date: 04/23/2010
• Status: Active Grant

• Current Assignee: Depuy Synthes Products Incorporated (Johnson & Johnson)
• Original Assignee: Depuy Synthes Products Incorporated (Johnson & Johnson)
• Inventors: Peterson, Joseph, Solitario, JR., Ralph
• Granted Patent: US 11,389,213 B2
• Time in Patent Office: Days
• CPC Class Codes: A61B 17/0218 for minimally invasive surgery A61B17/0281, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence
• CPC Class Codes: A61B 17/025 Joint distractors
• CPC Class Codes: A61B 17/7037 wherein pivoting is blocked when the rod is clamped
• CPC Class Codes: A61B 17/7074 Tools specially adapted for spinal fixation operations other than for bone removal or filler handling A61B17/7062, A61B17/808, A61B17/8858 take precedence; for spinal image producing devices A61B90/36, A61B34/20; markers A61B90/39
• CPC Class Codes: A61B 17/7077 for moving bone anchors attached to vertebrae, thereby displacing the vertebrae
• CPC Class Codes: A61B 17/7079 Tools requiring anchors to be already mounted on an implanted longitudinal or transverse element, e.g. where said element guides the anchor motion
• CPC Class Codes: A61B 17/7082 for driving, i.e. rotating, screws or screw parts specially adapted for spinal fixation, e.g. for driving polyaxial or tulip-headed screws driving other bone screws A61B17/8875
• CPC Class Codes: A61B 17/7086 Rod reducers, i.e. devices providing a mechanical advantage to allow a user to force a rod into or onto an anchor head other than by means of a rod-to-bone anchor locking element; rod removers
• CPC Class Codes: A61B 17/7091 for applying, tightening or removing longitudinal element-to-bone anchor locking elements, e.g. caps, set screws, nuts or wedges
• CPC Class Codes: A61B 2017/0046 with a releasable handle; with handle and operating part separable
• CPC Class Codes: A61B 2017/0256 for the spine
• CPC Class Codes: A61B 50/33 Trays

Abstract

Methods of applying a locking cap to a bone anchor assembly. The bone anchor assembly includes a bone anchor and an elongate rod. The bone anchor includes a body that defines a channel and has a tissue retractor coupled thereto that defines a partial pathway to the channel.

Claims

1. (canceled)

2. A system for use in minimally invasive spine surgery, the system comprising:

a bone anchor having first and second arms that are spaced from one another along a first direction so as to define a rod-receiving channel between the first and second arms; and

a tissue retractor that extends from one of the first and second arms but not the other of the second arms along a second direction that is perpendicular to the first direction, the tissue retractor defining a concave inner surface that defines a partial pathway.

3. The system of claim 2, wherein the bone anchor defines a plane that extends between the first and second arms, and the tissue retractor is disposed entirely on one side of the plane.

4. The system of claim 2, wherein the tissue retractor includes a resiliently movable arm that is movable between an engaged position and a flexed position, and the resiliently movable arm extends from one of the first and second arms of the bone anchor.

5. The system of claim 2, comprising a second tissue retractor that extends another one of the first and second arms but not the other of the first and second arms, the second tissue retractor defining a second inner surface that defines a partial pathway

6. The system of claim 5, further comprising a rod sized to be inserted between the first and second tissue retractors and into the rod-receiving channel of the bone anchor along the second direction, such that the rod is elongate along a third direction that is perpendicular to both the first and second directions.

7. The system of claim 2, further comprising:

an instrument configured to move at least one of the first bone anchor and a second bone anchor implanted in a second vertebra relative to one another, the instrument comprising;

a sleeve having a distal sleeve end configured to removeably couple to the tissue retractor, and a proximal sleeve end spaced from the distal end, the sleeve defining a hollow cavity that extends between the proximal and distal ends of the sleeve, and the sleeve configured to be removably couplable to the tissue retractor within the partial pathway;

a pivoting arm that is pivotally mounted to the sleeve; and

a ratchet mechanism configured to move the pivoting arm relative to the sleeve so as to cause at least one of the first and second bone anchors to move relative to the other of the first and second bone anchors.

8. The system of claim 7, wherein the tissue retractor comprises at least one resiliently movable arm configured to engage a bone anchor so as to couple the tissue retractor to the bone anchor, and the sleeve defines at least one slot at the distal sleeve end portion, wherein each of the at least one slot is aligned with one of the at least one resiliently movable arms.

9. The system of claim 7, wherein the proximal sleeve end is configured to engage a counter-torque handle such that the sleeve and counter-torque handle are rotatably fixed relative to one another.

10. The system of claim 7, wherein the instrument is a distractor that is configured to move the pivoting arm relative to the sleeve so as to cause at least one of the first and second bone anchors to move away from the other of the at least one of the first and second bone anchors.

11. The system of claim 10, wherein a distal end of the pivoting arm includes a blunt end portion configured to engage the second bone anchor.

12. The system of claim 7, wherein the instrument is a compressor that is configured to move the pivoting arm relative to the sleeve so as to cause at least one of the first and second bone anchors to move towards the other of the at least one of the first and second bone anchors.

13. A method comprising:

driving a bone anchor into bone, the bone anchor having first and second arms that are spaced from one another along a first direction so as to define a rod-receiving channel between the first and second arms,

wherein a tissue retractor extends from one of the first and second arms but not the other of the first and second arms, such that an inner surface of the tissue retractor defines a partial pathway, wherein the inner surface is concave.

14. The method of claim 13, wherein a second tissue retractor extends from the other of the first and second arms, but not the one of the first and second arms, such that an inner surface of the second tissue retractor defines a respective partial pathway.

15. The method of claim 14, comprising the step of inserting a rod between the first and second tissue retractors and into the rod-receiving channel of the bone anchor along a second direction, perpendicular to the first direction such that the rod is elongate along a third direction, perpendicular to both the first and second directions.