MODULAR SURGICAL INSTRUMENTS AND RELATED METHODS
First Claim
1. A surgical instrument, comprising:
- a housing having a central opening, a proximal end, a distal end, and a central longitudinal axis A1 extending between the proximal and distal ends;
first and second fixed arms extending distally from the housing;
first and second pivoting arms movably coupled to the housing, each pivoting arm having a proximal end and a distal end, the pivoting arms being configured to selectively retain a bone anchor therebetween; and
a locking member that is movable relative to the housing between a locked position and an unlocked position, wherein;
in the locked position, a blocking portion of the locking member is aligned with the pivoting arms and interferes with movement of the pivoting arms relative to the housing; and
in the unlocked position, a relief portion of the locking member is aligned with the pivoting arms such that the arms are free to move relative to the housing.
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Accused Products
Abstract
Modular surgical instruments and related methods are disclosed herein, e.g., for performing rod reduction, derotation, and/or set screw insertion during spinal surgery. An exemplary system can include an instrument body configured to couple to a bone anchor assembly to provide a modular platform for carrying out various steps of a surgical procedure. For example, the instrument body can receive a reduction instrument therethrough for reducing a spinal rod into the bone anchor assembly. A derotation instrument can be attached to the reduction instrument for performing derotation maneuvers or applying other manipulation forces. A modular driver or handle adapter can be attached to the reduction instrument and/or to the derotation instrument to facilitate rod reduction. Any of the instrument body, the reduction instrument, and the derotation instrument can include a working channel therethrough. A set screw or closure mechanism, and a driver instrument for applying the set screw or closure mechanism to the bone anchor assembly, can be inserted through the working channel.
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Citations
32 Claims
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1. A surgical instrument, comprising:
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a housing having a central opening, a proximal end, a distal end, and a central longitudinal axis A1 extending between the proximal and distal ends; first and second fixed arms extending distally from the housing; first and second pivoting arms movably coupled to the housing, each pivoting arm having a proximal end and a distal end, the pivoting arms being configured to selectively retain a bone anchor therebetween; and a locking member that is movable relative to the housing between a locked position and an unlocked position, wherein; in the locked position, a blocking portion of the locking member is aligned with the pivoting arms and interferes with movement of the pivoting arms relative to the housing; and in the unlocked position, a relief portion of the locking member is aligned with the pivoting arms such that the arms are free to move relative to the housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A surgical method, comprising:
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implanting a bone anchor in a bone of a patient, the bone anchor comprising a receiver member having a rod seat; positioning an instrument body in an unlocked configuration, the instrument body having a housing, opposed fixed arms extending distally from the housing and defining a rod slot therebetween, opposed pivoting arms movably coupled to the housing, a locking member, and a working channel extending through the instrument body, wherein the pivoting arms are free to pivot relative to the housing when the instrument body is in the unlocked configuration; moving distal ends of the pivoting arms apart from one another; positioning the bone anchor between the fixed arms of the instrument body such that the rod slot of the instrument body is aligned with the rod seat of the bone anchor; moving the distal ends of the pivoting arms towards one another to engage a mating feature of the bone anchor; positioning the instrument body in a locked configuration, wherein the locking member interferes with movement of the pivoting arms relative to the housing when the instrument body is in the locked configuration, thereby preventing the pivoting arms from disengaging from the mating feature of the bone anchor. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification