Alexis O-Ring and Charnley Retrievers in Total Hip Arthroplasty Surgery. Is There Any Difference in Intraoperative Contamination Rates?

Randomized, prospective, single-blind clinical trial comparing two static wound retractors - the Charnley retractor and the Alexis O-Ring retractor - in primary total hip arthroplasty (THA). The primary objective is to compare surgical site contamination rates between the two devices. Secondary objectives include comparison of incision length, surgical time, intraoperative skin lesions, and postoperative complications including periprosthetic joint infection. Patients will be randomized 1:1 to either retractor group. Surgical site contamination will be assessed through four intraoperative cultures taken at standardized timepoints. Follow-up will be conducted at 1 month postoperatively.