2023 ISAKOS Biennial Congress ePoster
The Economical and Reliable Image Free Navigation System for Acetabular Cup Implantation in Total Hip Arthroplasty
Bishnu Prasad Patro, MS, Bhubaneswar, Odisha INDIA
Manas Mohan Mohapatra, M Tech, bhubaneswar, Odisha INDIA
AIIMS, Bhubaneswar, Odisha, INDIA
FDA Status Not Applicable
Summary
Most economical navigation system for acetabular cup implantation in total hip arthroplasty.
ePosters will be available shortly before Congress
Abstract
Implantation of the acetabular cup is the cornerstone in total hip arthroplasty (THA). The functional outcome of THA is related to acetabular inclination and anteversion besides other parameters like; stability, limb length alignment, capsule closure, etc. Various navigation and robotic equipments are available to assist the surgeon to place the hip implant in the right version. High cost, steep learning curve, and safety of equipment has restricted its use to less than one percent.
We have designed an image-free navigation device to assist the surgeon to implant the acetabular cup in the right inclination and anteversion. The experiment has been performed on an artificial hip bone structure. Historically a total of 50 iterations of the angle measurements were performed to access the accuracy of the device. The images from each of the measurements were imported in ImageJ software to find out the actual angle. The principle of OpenCV is used for image processing in our navigation device.
The results of the study found the angle of inclination mean error of 0.15° with a standard deviation of 0.44° with a p-value <0.05, which is very significant. Similarly, the angle of anteversion mean error was -1.06° with a standard deviation of 0.34° and p-value < 0.05, which is very significant. The tool provides a good accuracy with an error
of less than1.5-2 degrees.
Our image processing device delivered promising results with regard to acetabular inclination and acetabular anteversion in invitro studies. The tool is compact, can be easily transported in a briefcase, and can be used without any extensive training. Besides an initial cost of a few thousand rupees, the recurring cost of each surgery is less than10 dollars. We presume this is the world’s most economical navigation tool which is reproducible and reliable.