Update on the treatment of acute infections in knee prostheses: Is it possible to retain the components? An in-depth look at the DAIR procedure.

Introduction: Periprosthetic knee infections are serious complications after knee arthroplasty, affecting 1 to 2% of patients with primary surgery and up to 20% of revisions. The DAIR strategy (debridement, antibiotics, and implant retention) has emerged as a treatment for acute infections, allowing component retention in certain cases, with a high success rate.

Objectives: This review discusses its application, success factors, techniques such as the «double DAIR» and postoperative management, highlighting the importance of correct patient selection and the combination of a thorough and meticulous surgical technique with appropriate antibiotic therapy to optimize results.

Methods: An exhaustive updated literature search was conducted regarding the use of DAIR in acute periprosthetic infections, highlighting the step-by-step procedure and some surgical tips that are helpful when performing it. Based on this, recommendations were made for physicians interested in the subject.

Results: A series of recommendations are made based on current literature, which are a useful guide when dealing with patients with acute infections in the context of knee prostheses, with a success rate greater than 70% in most cases where the patient is well selected.

Conclusions: DAIR is a useful and effective tool in the eradication and treatment of acute periprosthetic infections, with a good success rate. It is a cheap, technically simple and reproducible procedure, so as a group, we suggest it be adopted globally by orthopedic surgeons.