PATIENT SPECIFIC INSTRUMENTATION WITH MEMS IN SURGERY
First Claim
1. A method for creating a patient specific instrument model with an inertial sensor unit, comprising:
- obtaining, using one or more processors of a computer system, a patient specific bone model of at least part of a bone;
identifying, using the one or more processors of the computer system, at least one contact surface of the bone;
identifying, using the one or more processors of the computer system, orientation data related to the bone, a geometrical relation between the at least one contact surface and the orientation data being known;
generating, using the one or more processors of the computer system, a patient specific instrument model having at least one surface negatively corresponding to the at least one contact surface of the bone;
defining, using the one or more processors of the computer system, a connection configuration including a receptacle for an inertial sensor unit in the patient specific instrument model using said geometrical relation, the connection configuration relating a preset virtual orientation programmed into the inertial sensor unit to the orientation data of the bone such that a geometrical relation between the contact surface and the inertial sensor unit is known when the body and the inertial sensor unit are fixed to the bone; and
outputting the patient specific instrument model with the receptacle for receiving the inertial sensor unit.
3 Assignments
0 Petitions
Accused Products
Abstract
An assembly of a patient specific instrument and tracking system comprises a patient specific instrument having a body with a patient specific contact surface negatively shaped relative to a corresponding surface of a bone for complementary contact therewith. An inertial sensor unit with a preset orientation is connected to the body in a planned connection configuration, such that a geometrical relation between the contact surface and the inertial sensor unit is known. A tracking system has a tracking processor connected to the inertial sensor unit, a user interface, and bone orientation data related to the patient specific contact surface, the tracking processor producing orientation tracking data for the bone using the geometrical relation and the bone orientation data when the preset orientation of the inertial sensor unit is initialized, to output the orientation tracking data on the user interface.
24 Citations
11 Claims
-
1. A method for creating a patient specific instrument model with an inertial sensor unit, comprising:
-
obtaining, using one or more processors of a computer system, a patient specific bone model of at least part of a bone; identifying, using the one or more processors of the computer system, at least one contact surface of the bone; identifying, using the one or more processors of the computer system, orientation data related to the bone, a geometrical relation between the at least one contact surface and the orientation data being known; generating, using the one or more processors of the computer system, a patient specific instrument model having at least one surface negatively corresponding to the at least one contact surface of the bone; defining, using the one or more processors of the computer system, a connection configuration including a receptacle for an inertial sensor unit in the patient specific instrument model using said geometrical relation, the connection configuration relating a preset virtual orientation programmed into the inertial sensor unit to the orientation data of the bone such that a geometrical relation between the contact surface and the inertial sensor unit is known when the body and the inertial sensor unit are fixed to the bone; and outputting the patient specific instrument model with the receptacle for receiving the inertial sensor unit. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A method for tracking a bone with a patient specific instrument with an inertial sensor unit, in computer-assisted surgery, comprising:
-
obtaining a patient specific instrument with an inertial sensor unit, the inertial sensor unit being programmed with virtual orientation data related to the bone; placing the patient specific instrument on the bone by complementary contact between a surface of the bone and a negative patient specific surface of the patient specific instrument, a geometrical relation between the negative patient specific surface and the inertial sensor unit being known when the body and the inertial sensor unit are fixed to the bone; initializing the inertial sensor unit in the complementary contact to relate the orientation data to the bone; and tracking the bone using orientation data provided by the inertial sensor unit, the data being representative of an orientation of the bone and being calculated from the virtual orientation data and the geometrical relation. - View Dependent Claims (8, 9, 10, 11)
-
Specification