Citation, DOI, disclosures and article data
At the time the article was created Sajanakan Sriselvakumar had no financial relationships to ineligible companies to disclose.View Sajanakan Sriselvakumar's current disclosures
At the time the article was last revised Travis Fahrenhorst-Jones had no financial relationships to ineligible companies to disclose.View Travis Fahrenhorst-Jones's current disclosures
Locked knee is characterized by the inability of the patient to extend the knee. The most common cause for obstruction is bucket handle tears of the meniscus 1. Other causes for obstruction include cruciate ligament stumps, osteochondral fractures, synovial plicae, loose bodies and gouty tophi 2,3. This condition needs to be treated urgently as if left untreated, it can lead to flexion deformity of the knee and can create an increased focal stress point over the knee joint leading to cartilage damage and osteoarthritis.
Patients present with an inability to fully extend the knee. On clinical exam swelling may be present, and specific exam maneuvers may elicit ligament damage.
Can be useful in identifying the underlying cause of a locked knee; looking for meniscal tears, cruciate ligament injuries, loose bodies, or osteochondral fractures.
Treatment and prognosis
This condition is usually treated arthroscopically to address the underlying cause for the obstruction 1.