On-board tool tracking system and methods of computer assisted surgery
First Claim
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1. A method for computer assisted surgery (CAS) using a freehand surgical tool, the method comprising:
- creating a three dimensional representation of a portion of a patient to which a bone or tissue cutting procedure is to be performed;
identifying an area of the three dimensional representation corresponding to the portion of bone or tissue for which the procedure is to be performed using an active element of the freehand surgical tool;
creating a surgical plan for the area of the three dimensional representation corresponding to the portion of bone or tissue;
determining a position of the portion of bone or tissue for which the procedure is to be performed;
determining a position of the freehand surgical tool;
calculating a distance between the position of the portion of bone or tissue and the position of the hand held surgical tool;
setting a mode of the hand held surgical tool to a hover tracking mode if the distance between the portion of bone or tissue and the hand held surgical tool is greater than a first threshold distance;
setting the mode of the hand held surgical tool to an site approach tracking mode if the distance between the portion of bone or tissue and the hand held surgical tool is less than the first threshold distance and is greater than a second threshold distance; and
setting the mode of the hand held surgical tool to an active step mode if the distance between the portion of bone or tissue and the hand held surgical tool is less than the second threshold distance,wherein setting the mode to the hover tracking mode includes turning off a two-dimensional guidance graphical interface (GUI) associated with the hand held surgical tool, wherein setting the mode to the site approach tracking mode and the active step mode includes turning on the two-dimensional guidance GUI associated with the hand held surgical tool.
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Abstract
A number of improvements are provided relating to computer aided surgery utilizing an on tool tracking system. The various improvements relate generally to both the methods used during computer aided surgery and the devices used during such procedures. Other improvements relate to the structure of the tools used during a procedure and how the tools can be controlled using the OTT device. Still other improvements relate to methods of providing feedback during a procedure to improve either the efficiency or quality, or both, for a procedure including the rate of and type of data processed depending upon a CAS mode.
632 Citations
21 Claims
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1. A method for computer assisted surgery (CAS) using a freehand surgical tool, the method comprising:
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creating a three dimensional representation of a portion of a patient to which a bone or tissue cutting procedure is to be performed; identifying an area of the three dimensional representation corresponding to the portion of bone or tissue for which the procedure is to be performed using an active element of the freehand surgical tool; creating a surgical plan for the area of the three dimensional representation corresponding to the portion of bone or tissue; determining a position of the portion of bone or tissue for which the procedure is to be performed; determining a position of the freehand surgical tool; calculating a distance between the position of the portion of bone or tissue and the position of the hand held surgical tool; setting a mode of the hand held surgical tool to a hover tracking mode if the distance between the portion of bone or tissue and the hand held surgical tool is greater than a first threshold distance; setting the mode of the hand held surgical tool to an site approach tracking mode if the distance between the portion of bone or tissue and the hand held surgical tool is less than the first threshold distance and is greater than a second threshold distance; and setting the mode of the hand held surgical tool to an active step mode if the distance between the portion of bone or tissue and the hand held surgical tool is less than the second threshold distance, wherein setting the mode to the hover tracking mode includes turning off a two-dimensional guidance graphical interface (GUI) associated with the hand held surgical tool, wherein setting the mode to the site approach tracking mode and the active step mode includes turning on the two-dimensional guidance GUI associated with the hand held surgical tool. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification