SYSTEM AND METHOD FOR INTRA-OPERATIVE LEG POSITION MEASUREMENT
First Claim
1. A system for providing intra-operative leg position measurements during hip arthroplasty of a pelvis and a femur at a surgical site the system comprising:
- an optical sensor for coupling to the pelvis and for alignment with the surgical site,a target for coupling to the femur in alignment with the sensor, the sensor providing signals in response to the target for determining relative positions of the sensor and target; and
a processing unit for communicating with the sensor, the processing unit configured to use a baseline measurement of leg position and a map to calculate and display leg position measurements in real time, where the map is defined through a registration range-of-motion (RROM) procedure.
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Accused Products
Abstract
Systems, methods and computer program products are disclosed for medical navigational guidance systems. In one example, intra-operative leg position measurements are provided during hip arthroplasty. An optical sensor couples to a pelvis and a target couples to a femur in alignment with the sensor, which provides positional signals to a processing unit for determining a relative position of the sensor and target. The processing unit uses a baseline measurement of leg position and a map to calculate and display position measurements in real time. The map is defined through a registration range-of-motion procedure where instructions are presented to move the femur in at least two planes to generate signals to calculate the map. Leg position may be leg length, offset or anterior/posterior position. The map is used to present the leg position measurements in an anatomical, rather than a sensor, coordinate frame.
53 Citations
19 Claims
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1. A system for providing intra-operative leg position measurements during hip arthroplasty of a pelvis and a femur at a surgical site the system comprising:
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an optical sensor for coupling to the pelvis and for alignment with the surgical site, a target for coupling to the femur in alignment with the sensor, the sensor providing signals in response to the target for determining relative positions of the sensor and target; and a processing unit for communicating with the sensor, the processing unit configured to use a baseline measurement of leg position and a map to calculate and display leg position measurements in real time, where the map is defined through a registration range-of-motion (RROM) procedure. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A medical navigational guidance system comprising:
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a sensor for coupling to a bone and orienting toward a site for a medical procedure; a target, coupled to an object, for tracking by the sensor; and
,a processing unit in communication with the sensor, the processing unit configured to guide alignment of the sensor with the target, the processing unit using positional signals from the sensor to calculate and display, using a user interface, directional instructions to move into alignment the sensor and target. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A system for making sterile a non-sterile sensor for use in navigational guidance during surgery, the system comprising:
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a sterile drape having an optically transparent window for draping the sensor in a sterile barrier; a shroud, which when engaged with a draped optical sensor, secures the sensor through the drape in alignment with the window without breaching the sterile barrier; and a clamp, which, in its closed and position, is configured to rigidly hold the assembled shroud, drape and sensor, while preserving the optical sensor alignment in the window. - View Dependent Claims (16, 17, 18, 19)
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Specification