Abstract

BIAGIOTTI, F.; NALLY, F.; COSTA PAZ, M.  and  RASUMOFF, A.. Utilidad de la resonancia magnética en pacientes con prótesis de rodilla dolorosa mediante la utilización de un protocolo optimizado: estudio preliminar. Rev. argent. radiol. [online]. 2016, vol.80, n.2, pp.92-98. ISSN 1852-9992.

Objective: To establish the usefulness of magnetic resonance (MR) in patients with total knee replacement (TKR) pain after applying an optimised protocol, and to determinate which of the findings influence medical decision. Materials and methods: Fifteen patients suffering knee pain after TKR were studied using an optimised MR examination protocol from March 2013 to February 2014. The MR was interpreted by a musculoskeletal radiologist and findings were registered. Results: Out of the 15 patients, 74% were female. Mean age was 74 +/ - 7 years. The cause of pain was identified in 80% of the cases, and the medical decision was changed in 33%. Increased intra-articular fluid was seen in 93%, and signs of synovitis in 33%. The patellar, quadricipital, and popliteal tendons were correctly assessed in 77%, 92%, and 69% of patients, respectively, while the tibial and the fibula collateral ligaments were correctly assessed in 46% and 54% of patients, respectively. Discussion: Despite other articles showing a different prevalence of synovitis and MR findings, most of them showed that an optimised protocol impacted on clinical care. Also, most of the adjacent anatomical structures were successfully observed, as in our case. Conclusion: Even in the absence of metal reduction tailored sequences, an optimised protocol manages to diagnose conditions that alter clinical decisions and allows the identification of adjacent anatomical structures.

Keywords : Artefacts; Arthroplasty replacement knee; Magnetic resonance.

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