An interventional study of Alexis O-Ring Wound Retractor and Charnley Retractor in Total Hip Arthroplasty (THA), sponsored by Hospital del Mar. Completed at 1 site in Spain. Per ClinicalTrials.gov, last updated 2026-06-02.
Sponsored by Hospital del Mar · Not applicable, Interventional, and Treatment
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.
Hospital del Mar is the lead sponsor of 45 studies on the registry; 17 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Exclusion Criteria:
Device: Alexis O-Ring Wound Retractor
Device: Charnley Retractor
Circular polyurethane wound retractor (Applied Medical, Rancho Santa Margarita, CA, USA). A rigid deep ring is placed beneath the fascia lata, and the polyurethane cylinder is rolled around the outer ring to retract wound edges and create a physical barrier between the skin and the surgical field.
Semi-rigid stainless steel ortostatic retractor consisting of a bow with two blades (one fixed, one adjustable). Placed around the incision at the level of the fascia lata to retract wound edges through elastic tension. Standard retractor currently used in total hip arthroplasty.
Surgical site contamination rate
Intraoperative surgical site contamination assessed through four standardized cultures: (1) subcutaneous tissue immediately after incision, (2) deep tissue (joint capsule) before arthrotomy, (3) deep tissue after placement of definitive prosthetic components, and (4) subcutaneous tissue after retractor removal.
Time frame: Intraoperative
Plan to share: No — No individual participant data sharing plan is foreseen for this study
No publications or documents are linked to this record.
This study is completed, as verified in May 2026. You cannot join it, but the record below documents what was studied.
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