Patent ID: 9248002
Filing Date: 2016-02-02
CPC Classification: A61B,A61F

Claim Text:
1. A method for aligning an acetabular cup insertion instrument comprising: taking a pre-operative anterior/posterior view digital x-ray image and a lateral view pre-operative digital x-ray image of the pelvis of a patient; determining a desired acetabular cup abduction and anteversion, angle based on a pre-operative x-ray; identifying at least three points on the digital anterior/posterior digital x-ray image and at least two points on the lateral digital x-ray image; calculating the lengths and angles between each of the points on both the anterior/posterior pre-operative digital x-ray image and the lateral pre-operative digital x-ray image; positioning a patient on an operating table in an operating room, the operating table having a reference element thereon; taking at least one intra-operative pelvic digital x-ray image of the patient positioned on the operating table; identifying at least three points on the intra-operative x-ray image, the points corresponding to the points on the pre-operative x-ray image; calculating the lengths and angles between each of the at least three points on the intra-operative digital x-ray image; calculating an intra-operative angular deviation of the acetabular cup insertion instrument from the desired acetabular cup abduction and anteversion angle by comparing the dimensional differences between the points on the pre-operative x-ray images and the at least one intra-operative x-ray image; and intra-operatively aligning the acetabular cup insertion instrument to the calculated angular position, based on the intra-operative angular deviation from the desired abduction and anteversion angles, using angle measuring tools.