Understanding the Anterior Cruciate Ligament (ACL) Injury Assessment
This is the **injury name** (a tear of the ACL), not a specific test. The main tests used to diagnose it are the **Lachman Test** and **Anterior Drawer Test**.
Watch How It's Done
How do I start?
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What happens?
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In Plain English
What Does a Positive Result Mean?
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Helpful Tip:
ACL rupture is the most common ligamentous injury of the knee.
Safety First
This guide is to help you understand what happens in a clinic. Do not try to diagnose yourself. If you have severe pain, swelling, or cannot put weight on your leg, please visit an urgent care center or your doctor immediately.
Other Knee Tests
Pivot Shift Test
To dynamically assess for **anterolateral rotatory instability** of the knee, which is highly indicative of a **complete ACL tear**.
Posterior Drawer Test of the Knee
To assess the integrity of the **Posterior Cruciate Ligament (PCL)**.
Posterior Sag Sign (Gravity Drawer Test)
To detect a rupture of the **Posterior Cruciate Ligament (PCL)** by observing the effect of gravity.
Slocum Test (Anterolateral Rotatory Instability)
To assess for **anterolateral rotatory instability** and the function of the **Anterolateral Ligament** (a dynamic variant of the Anterior Drawer).