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Related Experiment Videos

The locked knee.

R L Allum, J R Jones

    Injury
    |July 1, 1986
    PubMed
    Summary
    This summary is machine-generated.

    A knee joint examination under anesthesia and arthroscopy revealed abnormalities in 92% of patients with locked knees. Prompt surgical intervention is recommended for internal derangement diagnosis and treatment.

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    Area of Science:

    • Orthopedic Surgery
    • Knee Arthroscopy
    • Sports Medicine

    Background:

    • Locked knee presentation is common in orthopedic practice.
    • Accurate preoperative diagnosis of internal derangement can be challenging.
    • Understanding the underlying causes of knee locking is crucial for effective management.

    Purpose of the Study:

    • To prospectively investigate the causes of locked knee in 50 patients.
    • To evaluate the diagnostic utility of examination under anesthesia and arthroscopy.
    • To determine the relationship between knee position under anesthesia and mechanical block.

    Main Methods:

    • Prospective investigation of 50 patients with locked knees.
    • Examination under anesthesia.
    • Diagnostic knee arthroscopy.

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    Main Results:

    • 92% of patients had definite abnormalities, including torn menisci (68%) and cruciate ligament ruptures (10%).
    • 16% of knees remained locked after anesthesia induction.
    • No preoperative clinical features reliably distinguished normal knees from those with internal derangement.

    Conclusions:

    • A true mechanical block is not always present in locked knees.
    • Examination under anesthesia and arthroscopy are effective diagnostic tools.
    • Prompt surgical management is proposed for patients with locked knees and internal derangement.