Clinical applications of a laser guidance system with dual laser beam rays as augmented reality of surgical navigation

Abstract

We have developed a novel laser guidance system that uses 2 or more laser beam emitters. Two or more fan-shaped beam tracts intersect in a line that can be controlled in any direction by changing the angle and direction of beam oscillation. The laser guidance system draws cross hairs on a target, and the intersection of the cross hairs is the entry point for a drill or wire. After stabilization of this entry point, the system draws 2 or more lines along the guide sleeve. We have used this laser guidance system in 10 total hip arthroplasty (THA) procedures and 1 open-wedge-type high tibial osteotomy (HTO) procedure. In our clinical experience, this laser guidance system has worked well in the operating room. It effectively draws laser cross hairs on the patient to indicate the entry point of straight surgical tools. The direction of the tools was indicated by parallel laser beams projected onto the guide sleeves. The system assisted surgeons with acetabular cup placement and femoral reaming and rasping in THA. It was also useful for screw insertion and drilling of the osteotomy plane in HTO.