Rod length measuring instrument
First Claim
Patent Images
1. A kit for use in spinal stabilization procedures comprising:
- an instrument for measuring the distance between two bony structures;
a plurality of rods for spanning the distance between the two bony structures;
a plurality of pedicle screws to be placed into the bony structures;
a plurality of guide wires to guide a pedicle screw into place in the bony structure.
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Accused Products
Abstract
There is disclosed an apparatus and method for measuring the distance between the bone anchors inserted into vertebrae comprising two legs pivotally coupled to each other, the two legs are also coupled to a proportional magnifier which is coupled to a scale. The proportional magnifier allows the scale to be easily viewable.
53 Citations
26 Claims
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1. A kit for use in spinal stabilization procedures comprising:
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an instrument for measuring the distance between two bony structures;
a plurality of rods for spanning the distance between the two bony structures;
a plurality of pedicle screws to be placed into the bony structures;
a plurality of guide wires to guide a pedicle screw into place in the bony structure. - View Dependent Claims (2, 3, 4, 5)
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6. A medical instrument for measuring, comprising:
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a handle portion;
a first leg having a distal end portion and a proximal end portion and a second leg having a distal end portion and a proximal end portion;
a proportional magnifier coupled to the first and second leg, wherein the proportional magnifier has a first arm and a second arm; and
a scale coupled to the first and second arm of the proportional magnifier. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A method of using a medical instrument for measuring the distance between bony structures, comprising:
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implanting a first pedicle screw into a first vertebra, wherein the implanted first pedicle screw is coupled to an extension;
placing a guide wire in a second vertebra to mark the location of placement for a second pedicle screw;
providing an instrument for measuring the distance, comprising;
a first leg and a second leg pivotally coupled to each other, a proportional magnifier coupled to the first and second leg, a scale coupled to the proportional magnifier, and a handle portion coupled to the first and second legs;
gripping the handle portion;
sliding the first leg down the extension to a top of the first pedicle screw;
sliding the second leg down the guide wire to a top of the vertebra;
releasing the handle portion;
reading the scale to determine a distance between the first and second vertebra, wherein the distance is amplified by the proportional magnifier to be readable by a surgeon;
selecting an implant that corresponds to the distance between the first and second vertebra.
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Specification