Watson Extraction System for Joint Replacement

(WES Trial)

This trial explores a new tool for individuals undergoing a second hip replacement surgery. The Watson Extraction System (WES) may simplify and enhance the safety of removing the old hip implant, potentially reducing surgery time and costs. Participants will undergo surgery using either the WES or the standard methods currently employed at The Ottawa Hospital. The trial seeks individuals who have had a hip replacement, require a revision, and possess a specific type of firmly fixed implant. As an unphased trial, it offers participants the chance to contribute to innovative research that could enhance surgical outcomes for future patients.

A previous study used the Watson Extraction System (WES) in a few cases, yielding promising results. The system appears to speed up the extraction process and reduce the need for more invasive procedures like extended trochanteric osteotomy (ETO), which can lead to complications. Health Canada's approval of the WES indicates a certain level of safety for human use. However, these studies do not provide specific data on negative effects or side effects. This trial aims to better understand how well people tolerate the WES compared to the current standard methods used at The Ottawa Hospital.¹²³⁴⁵

The Watson Extraction System (WES) is unique because it introduces a more streamlined process for stem extraction during joint replacement surgeries. Unlike the current standard of care, which relies on tools like K-wires, burrs, and flexible osteotomes based on surgeon preference, WES offers a consistent approach by utilizing its specialized device first. Researchers are excited about WES because it could potentially improve surgical outcomes by making the extraction process more efficient and reducing variability in surgical techniques.

Research has shown that the Watson Extraction System (WES), which participants in this trial may receive, has been tested in a few cases with promising results. The WES can reduce the time needed to remove the femoral stem, with some procedures taking only 6 to 18 minutes. This system also helps avoid more invasive surgeries, such as extended trochanteric osteotomy (ETO), which can lead to additional complications. Designed to be less invasive, the WES aims to preserve bone during the procedure. Although more research is needed to compare it directly to current methods, these early results are encouraging.⁶⁷⁸⁹¹⁰