Systems and methods for joint replacement
First Claim
Patent Images
1. A method of determining an anatomical feature during a knee procedure, comprising:
- coupling an orientation system with a distal aspect of a femur, the orientation system comprising a housing, a first orientation sensor and a second orientation sensor disposed within the housing, and a user interface operably coupled with the first orientation sensor and the second orientation sensor;
wherein the first orientation sensor is selected from the group of sensor types consisting of;
gyroscopic sensor, accelerometer sensor, tilt sensor, and magnetometer, and the second orientation sensor is selected from the group of sensor types consisting of;
gyroscopic sensor, accelerometer sensor, tilt sensor, and magnetometer;
wherein the first orientation sensor is a different sensor type than the second orientation sensor;
estimating a first error associated with the first orientation sensor based in part upon the output of the second orientation sensor;
estimating a second error associated with the second orientation sensor based in part upon the output of the first orientation sensor;
moving the orientation system to collect data indicative of the anatomical feature relevant to the knee procedure; and
reducing error from the data.
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Abstract
Systems and methods for joint replacement are provided. The systems and methods include a surgical orientation device, a reference sensor device, and at least one orthopedic fixture. The surgical orientation device, reference sensor device, and orthopedic fixtures can be used to locate the orientation of an axis in the body, to adjust an orientation of a cutting plane or planes along a bony surface, or otherwise to assist in an orthopedic procedure(s).
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Citations
23 Claims
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1. A method of determining an anatomical feature during a knee procedure, comprising:
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coupling an orientation system with a distal aspect of a femur, the orientation system comprising a housing, a first orientation sensor and a second orientation sensor disposed within the housing, and a user interface operably coupled with the first orientation sensor and the second orientation sensor; wherein the first orientation sensor is selected from the group of sensor types consisting of;
gyroscopic sensor, accelerometer sensor, tilt sensor, and magnetometer, and the second orientation sensor is selected from the group of sensor types consisting of;
gyroscopic sensor, accelerometer sensor, tilt sensor, and magnetometer;wherein the first orientation sensor is a different sensor type than the second orientation sensor; estimating a first error associated with the first orientation sensor based in part upon the output of the second orientation sensor; estimating a second error associated with the second orientation sensor based in part upon the output of the first orientation sensor; moving the orientation system to collect data indicative of the anatomical feature relevant to the knee procedure; and reducing error from the data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 17)
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15. A method of determining an anatomical feature during a knee procedure, comprising:
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coupling an orientation system with a distal aspect of a femur, the orientation system comprising a first housing, a first orientation sensor disposed within the first housing, and a user interface operably coupled with the first orientation sensor; coupling a reference system with a distal aspect of a femur, the reference system comprising a second housing, a second orientation sensor disposed within the second housing, wherein the orientation system and the reference system are separately moveable relative to each other; interacting with the user interface to begin an analysis of potential sources of error in the orientation system after coupling the orientation system and the reference system to the distal femoral aspect; moving the orientation system to collect data indicative of the anatomical feature; estimating a first error associated with the first orientation sensor when the conditions of the second orientation sensor are known; and estimating a second error associated with the second orientation sensor when the conditions of the first orientation sensor are known. - View Dependent Claims (21, 22, 23)
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18. A method of determining an anatomical feature during a knee procedure, comprising:
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coupling an orientation system with a distal aspect of a femur, the orientation system comprising a housing, a first orientation sensor and a second orientation sensor disposed within the housing, and a user interface operably coupled with the first orientation sensor and the second orientation sensor; estimating a first error associated with the first orientation sensor based in part upon the output of the second orientation sensor; estimating a second error associated with the second orientation sensor based in part upon the output of the first orientation sensor; moving the orientation system to collect data indicative of the anatomical feature relevant to the knee procedure; and reducing error from the data, wherein the second orientation sensor includes a gyroscope and estimating the second error is based in part upon the output of the first orientation sensor at substantially zero velocity.
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19. A method of determining an anatomical feature during a knee procedure, comprising:
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coupling an orientation system with a distal aspect of a femur, the orientation system comprising a housing, a first orientation sensor and a second orientation sensor disposed within the housing, and a user interface operably coupled with the first orientation sensor and the second orientation sensor; estimating a first error associated with the first orientation sensor based in part upon the output of the second orientation sensor; estimating a second error associated with the second orientation sensor based in part upon the output of the first orientation sensor; moving the orientation system to collect data indicative of the anatomical feature relevant to the knee procedure; and reducing error from the data, wherein the first orientation sensor is an accelerometer and the second orientation sensor is a gyroscope.
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20. A method of determining an anatomical feature during a knee procedure, comprising:
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coupling an orientation system with a distal aspect of a femur, the orientation system comprising a housing, an inertial sensor assembly including an accelerometer and a gyroscope disposed within the housing, and a user interface operably coupled with the accelerometer and the gyroscope; moving the orientation system to collect data indicative of the anatomical feature relevant to the knee procedure, wherein when moving the orientation system, the accelerometer generates an output; estimating an error of the accelerometer by comparing a position or an orientation value derived from the output of the accelerometer to an expected position or orientation value based at least in part on the known conditions of the gyroscope; and reducing the error contributed by the accelerometer from the data.
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Specification