SYSTEMS AND METHODS FOR MEASURING PARAMETERS IN JOINT REPLACEMENT SURGERY
First Claim
1. A computer-assisted surgery system comprising:
- a display;
an input device configured to receive data input by a user;
a processor, operatively coupled to the input device and the display and configured to;
establish a first position of a pre-operative center of rotation of a joint in a first coordinate space of a first bone and a second coordinate space of a second bone;
establish a second position of the pre-operative center of rotation of the joint in the first coordinate space of the first bone, wherein the second position is a projection into the first coordinate space of the first bone of the position of the pre-operative center of rotation maintained in a constant position in the second coordinate space of the second bone; and
determine a change in a parameter associated with the joint based on the first and second positions; and
output a result indicative of the determined change in the parameter to the display.
1 Assignment
0 Petitions
Accused Products
Abstract
A computer-assisted surgery system includes a display, an input device configured to receive data input by a user, and a processor, coupled to the input device and the display. The processor is configured to establish a first position of a pre-operative center of rotation of a joint in a first coordinate space of a first bone and a second coordinate space of a second bone and establish a second position of the pre-operative center of rotation of the joint in the first coordinate space, wherein the second position is a projection into the first coordinate space of the position of the pre-operative center of rotation maintained in a constant position in the second coordinate space. The processor is further configured to determine a change in a parameter associated with the joint based on the first and second positions and output a result indicating the determined change to the display.
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Citations
16 Claims
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1. A computer-assisted surgery system comprising:
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a display; an input device configured to receive data input by a user; a processor, operatively coupled to the input device and the display and configured to; establish a first position of a pre-operative center of rotation of a joint in a first coordinate space of a first bone and a second coordinate space of a second bone; establish a second position of the pre-operative center of rotation of the joint in the first coordinate space of the first bone, wherein the second position is a projection into the first coordinate space of the first bone of the position of the pre-operative center of rotation maintained in a constant position in the second coordinate space of the second bone; and determine a change in a parameter associated with the joint based on the first and second positions; and output a result indicative of the determined change in the parameter to the display. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A computer-assisted surgery system for determining a change in a parameter associated with a joint caused by a modification of a portion of the joint, the method comprising:
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a display; an input device; and a processor, operatively coupled to the input device and the display and configured to; establish a first point of reference relative to a first bone of a joint, the first point of reference indicative of an estimated pre-operative center of rotation of the joint in pelvic space; establish, after a modification of the joint, a second point of reference indicative of an estimated post-modification center of rotation of the joint; position a virtual representation of the first bone in a predetermined pose based on the second point of reference and relative to a second bone; approximate, based on the positioning of the virtual representation of the first bone in the predetermined pose, a third point of reference in pelvic space indicative of a position of the first point of reference maintained in a fixed relationship relative to the first bone; estimate a change in a parameter associated with the joint based on a difference between the third point of reference and the first point of reference; and output a result indicative of the estimated change in the parameter to the display. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification