This is a prospective, randomized, blinded clinical trial to determine if the Air Barrier System device reduces the incidence of surgical site infection after total hip replacement, acetabular repair, posterior spinal fusion, and prosthetic vascular graft procedures.

This project is an evaluation of a novel device, the Air Barrier System (ABS), to reduce the risk of prosthesis-related surgical site infection in a multi-center clinical trial. The ABS shields surgical incisions intra-operatively by creating a field of high-purity air surrounding an incision that prevents airborne microorganisms from entering the incision.

This research will evaluate ABS performance in a prospective, randomized, blinded multi-center trial. The surgical procedures studied will include total hip arthroplasty, trauma-related acetabula reconstruction, posterior instrumented spine fusion, and prosthetic vascular graft procedures. Patients will be enrolled during the first two years of the study, and CDC guidelines require a one year follow-up period to monitor patients for potential prosthesis-related infections.

Inclusion Criteria:

• Total hip arthroplasty;
• Acetabular repair with instrumentation;
• Posterior lumbar, cervical, or thoracic (up to and including 6 vertebral levels) spine fusion with instrumentation and vascular prosthetic graft implantation.

Exclusion Criteria:

• History of prior prosthesis infection;
• Active infection;
• Open traumatic wounds as is the case after some acetabular fractures.

There is no current plan.