This study evaluated the use of an automated custom-made multiplex PCR (mPCR) test of synovial fluid in presumed aseptic revision hip and knee arthroplasties. Of all 200 patients, none developed a periprosthetic joint infection (PJI) within the first year after surgery. The study showed that a positive mPCR test did not have value for prediction of PJI development. Therefore, the authors do not recommend using this test in presumed aseptic hip or knee revision surgery.

The relation between postoperative wound leakage and occurrence of a prosthetic joint infection (PJI) after arthroplasty has not been investigated in a prospective study. We performed a large cohort study in which 1019 patients, after arthroplasty, recorded their wound drainage status in a wound care app during 30 postoperative days. Risk factors for wound drainage were identified. Moderate to heavy wound leakage in the third postoperative week was strongly associated with the occurrence of PJI.

Patients who receive joint replacement surgery might suffer from infection, which usually requires another surgery to clean the prosthesis and remove infected tissue. This tissue is analysed for bacteria in order to start appropriate antibiotic therapy. Bacteria are not always found, calling the appropriateness of the second surgery into question. We compared the treatment outcome in a large group of culture-positive and culture-negative patients and noticed a better outcome in the latter group.