Title: Posterolateral Corner Injury<br/>Author: Brian Corwell<br/><a href='http://umem.org/profiles/faculty/294/'>[Click to email author]</a><hr/><h1 id="ctl00_content_lblTopicTitle" style="font-size: 24px; margin-top: 0px; color: rgb(51, 51, 51); font-family: Arial, Helvetica, sans-serif; margin-bottom: 0px;">
Posterolateral Corner Injury</h1>
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Hx: hyperextension injury (contact and non contact), varus directed blow to flexed knee, direct blow to anteriomedial knee. Report instability symptoms when knee is in full extension.</p>
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PE: Varus stress testing</p>
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Varus laxity at 0° indicate LCL <strong>and</strong> cruciate ligament (ACL/PCL) injury</p>
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Varus laxity at 30° indicates LCL injury</p>
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Dial test - inspects the external rotation at the knee joint/performed in both 30° and 90° knee flexion. The dial test inspects the external rotation at the knee joint</p>
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https://www.youtube.com/watch?v=pW4yv0zg4RY</p>
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<strong>Positive at 30</strong><strong>° </strong><strong>= </strong><strong>> 10° external rotation asymmetry = isolated PCL injury</strong></p>
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<strong>Positive at </strong><strong>30</strong><strong>° & 9</strong><strong>0</strong><strong>°</strong><strong> = </strong><strong>Posterior</strong> <strong>lateral corner injury and PCL injury</strong></p>