Method and system for aligning a prosthesis during surgery using active sensors
First Claim
1. A device for positioning a sensor at a predetermined location and orientation on a bone of a patient, the device comprising:
- at least three contact members adapted for contacting anatomical landmarks providing reference locations for the bone; and
a guide for positioning at least one sensor mount adapted for attaching the sensor on the bone at the predetermined location and orientation with respect to the at least three contact members, the sensor mount mateable with the sensor,wherein the guide is removable from the sensor mount when the sensor mount is attached to the bone, such that the device is removable from the patient.
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Abstract
A method and system for determining the orientation of a surgical tool with respect to a bone of a patient, and a device for positioning a sensor are disclosed. The bone has at least three predetermined reference locations. The method includes: (a) defining a reference plane based on distances between the at least three predetermined reference locations; (b) determining a first sensing location on the bone based on the at least three predetermined reference locations; (c) attaching a first active sensor to the bone at the first sensing location; (d) positioning the surgical tool proximate the bone, the surgical tool including a second active sensor; (e) sensing movement of the bone using the first active sensor; (T) transmitting first information relating to movement of the bone using the first active sensor; (g) sensing movement of the surgical tool using the second active sensor; (h) transmitting second information relating to movement of the surgical tool using the second active sensor; (i) receiving the first and second information from the first and second active sensors; and (j) determining a three-dimensional orientation of the surgical tool with respect to the reference plane based on the first and second information. In some cases, the method may further include displaying the three dimensional orientation information to the user on a display device.
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Citations
23 Claims
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1. A device for positioning a sensor at a predetermined location and orientation on a bone of a patient, the device comprising:
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at least three contact members adapted for contacting anatomical landmarks providing reference locations for the bone; and a guide for positioning at least one sensor mount adapted for attaching the sensor on the bone at the predetermined location and orientation with respect to the at least three contact members, the sensor mount mateable with the sensor, wherein the guide is removable from the sensor mount when the sensor mount is attached to the bone, such that the device is removable from the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A device for positioning a sensor at a predetermined location and orientation on a bone of a patient, the device comprising:
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at least three contact members adapted for contacting anatomical landmarks providing reference locations for the bone; and a guide for positioning at least one sensor mount adapted for attaching the sensor on the bone at the predetermined location and orientation with respect to the at least three contact members, the sensor mount mateable with the sensor, wherein the guide comprises a first portion movably connected to a second portion, wherein the first portion is movable between an open position and a closed position, wherein in the closed position, the first portion is in engagement with the second portion to position the sensor mount in the predetermined position, and wherein, in the open position, the first portion is disengaged from the second portion to permit removal of the device after the sensor mount is positioned at the predetermined location.
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Specification