PITFALLS AND SOLUTIONS IN COMPUTER ASSISTED TOTAL HIP ARTHROPLASTY

Abstract

The use of computer aided joint replacement surgery is increasing exponentially. Its use in hip arthroplasty is still under developmental phase. Although the available literature shows there is increased accuracy of the component placement but there can be a number of factors on which it relies.

We have used the Stryker navigation system to aid in total hip arthroplasty for more than four years. It is improving continuously with time. Still there are many factors which are completely surgeon dependent and which can cause lot of variations in the component placement. Most important factors are the registration of patient anatomy and fixity and immobility of the bone trackers during the procedure. A number of other simple things can produce errors. We carried out some studies to see the effect on navigation values which will be presented. While use of computer navigation can aid greatly in achieving the set goals, it is dependent on surgeon thought process and appropriate implementation of the procedure.