• Brit J Hosp Med · Jan 2024

    The locked knee.

    • John-Henry Rhind, Haseeb Khawar, Mark Webb, and Hugo Guthrie.
    • Department of Trauma and Orthopaedics, Epsom and St. Helier Hospital, Sutton, Surrey, UK.
    • Brit J Hosp Med. 2024 Jan 2; 85 (1): 191-9.

    AbstractThe acute locked knee is an orthopaedic emergency requiring prompt diagnosis and treatment. It can be classified as acute or chronic. The term 'locked knee' refers to a knee that demonstrates fixed flexion or which has a 'block' to complete extension. Some degree of active or passive extension may be achievable, but not full extension. The most frequent causes of a locked knee are a meniscal tear, rupture of the anterior cruciate ligament or loose bodies. Magnetic resonance imaging is the gold standard in diagnostic imaging. Knee arthroscopy is considered the gold standard in management. This article gives an overview of the presentation, assessment and management of the locked knee for core surgical, acute care common stem and emergency medicine trainees.

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