Patent ID: 11857265
Assignee: BOARD OF REGENTS OF THE UNIVERSITY OF NEBRASKA
Field: Medical technology (Instruments)
Classification: CPC A  G | IPC A

Claim 0:
1. A method for guiding a freehand surgical procedure using a freehand surgical saw, the method comprising steps of:
creating an electronic three dimensional representation of a portion of a patient to which the guided freehand surgical procedure is to be performed;
identifying a portion of the electronic three dimensional representation of the portion of the patient corresponding to a portion of tissue for which the guided freehand surgical procedure is to be performed to form a planar cut in the portion of the patient;
displaying a three dimensional surgical scene that depicts an orientation of the electronic three dimensional representation of the portion of the patient and further depicts an electronic three dimensional representation of a blade of the freehand surgical saw during the guided freehand surgical procedure;
altering an electronic representation of a boundary of the blade of the freehand surgical saw by expanding the electronic three dimensional representation of the blade in one or more direction along a cutting plane within the three dimensional surgical scene to aid in alignment with the orientation of the electronic three dimensional representation of the portion of the patient;
tracking the freehand surgical saw while performing the guided freehand surgical procedure to obtain data regarding the position and orientation of the freehand surgical saw blade relative to the portion of the patient; and
varying the display of the electronic three dimensional representation of the portion of the patient and the electronic three dimensional representation of the blade in response to the position and orientation data obtained during the tracking step.