Standard diagnostic methods are not adequate to identify prosthetic joint infections (PJIs) in patients with rheumatic diseases, according to findings from a new study by researchers from Hospital for Special Surgery (HSS) in New York City. The study was presented at the American College of Rheumatology/Association of Rheumatology Professionals annual meeting in Atlanta on November 12.
Lead study author Susan M. Goodman, MD, a rheumatologist at HSS, said that while patients with rheumatic diseases are more prone to developing PJIs, it is also harder to make a PJI diagnosis in this population because many of the typical inflammation features of PJIs are similar to those seen in inflammatory arthritis flares. “If a patient with osteoarthritis comes in with a swollen and inflamed prosthetic joint, it is an infection until proven otherwise, but for patients with rheumatoid arthritis, it can be very hard to sort out whether this is part of an overall flare of disease or if it is a true infection,” she said. “None of the available tests are that helpful.”