PROMIS Evaluation Study

Total hip arthroplasty (hip replacement surgery) is one of the most successful and common orthopedic procedures, dramatically improving quality of life for patients with severe hip arthritis. The PROMIS stem is a specific hip implant design, and this registry study tracks the functional outcomes and symptom burden of patients who receive it in real-world clinical practice. By systematically collecting standardized patient-reported outcomes (using the PROMIS — Patient-Reported Outcomes Measurement Information System — questionnaire tools), the registry evaluates how well this implant performs over time. All adults 18 or older who undergo primary total hip arthroplasty using the PROMIS stem are eligible to participate. There are no exclusion criteria for this registry — the goal is to capture as comprehensive a real-world dataset as possible. Participants will complete validated questionnaires about their pain, physical function, and quality of life before surgery and at regular follow-up intervals after their hip replacement. No additional procedures beyond routine clinical care are required. This research is important because while clinical trial data on hip implants often comes from highly selected patient populations, registry data reflects how devices perform across the full spectrum of patients who receive them in everyday practice — including elderly, heavier, and more medically complex patients. This real-world evidence is essential for confirming implant safety and effectiveness, identifying rare complications early, and guiding future implant design improvements.