• J Ultrasound Med · Nov 2009

    Controlled Clinical Trial

    Feasibility of sonography for intra-articular injections in the knee through a medial patellar portal.

    • Sang Hee Im, Sang Chul Lee, Yong Bum Park, Sung-Rae Cho, and Jong Chan Kim.
    • Department of Physical Medicine and Rehabilitation, Jeju National University Hospital, School of Medicine, Jeju National University, Jeju, Korea.
    • J Ultrasound Med. 2009 Nov 1;28(11):1465-70.

    ObjectiveThe purpose of this study was to investigate the feasibility of using real-time high-resolution sonography to guide an injection needle into the intra-articular space within the knee.MethodsEighty-nine patients with radiographically confirmed knee osteoarthritis (Kellgren-Lawrence grade 2 or 3) without an effusion were included. After sonographically guided or blind injection of hyaluronic acid (HA) and contrast dye through a medial patellar portal (MPP) into the knee joint, a radiographic image was made to ascertain whether the injected material had reached the intra-articular space.ResultSonographically guided injections of HA into the knee joint had a significantly greater accuracy rate (95.6%) than blind injections (77.3%; P = .01).ConclusionsIntra-articular injections via an MPP using sonographic guidance may raise the accuracy rate in knee joint injections.

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