Recognising an ACL Tear: 3 Key Signs and Clinical Testing
- Sunil Ram
- Apr 7
- 2 min read
An Anterior Cruciate Ligament (ACL) tear is one of the most common and debilitating knee injuries, particularly among athletes and active individuals. Quick recognition and diagnosis can significantly impact the effectiveness of your recovery plan. Here are three critical signs that may indicate you've experienced an ACL tear:
1. Knee Twist (Mechanism of Injury)
ACL injuries often occur from twisting movements, sudden changes in direction, or awkward landings from jumps. If your knee has recently twisted unexpectedly during physical activity, you might have compromised your ACL.
2. Audible "Pop" Sound
One hallmark of an ACL tear is an audible popping sound at the moment of injury. Many individuals describe this sound as unmistakable and alarming, immediately followed by intense discomfort or pain.
3. Sudden Knee Swelling
Immediate swelling after a knee injury strongly suggests an ACL tear. This swelling occurs due to internal bleeding within the knee joint, known medically as hemarthrosis.
Clinical Testing: The Anterior Drawer Test
To confirm a suspected ACL tear, clinicians frequently use the Anterior Drawer Test. This test assesses the stability and integrity of your ACL by checking for abnormal forward movement of the tibia (shinbone) relative to the femur (thighbone).
How the Test is Performed:
You lie on your back with the injured knee bent to about 90 degrees.
The clinician stabilises your foot and gently pulls your tibia forward.
Excessive forward movement suggests an ACL injury.
Watch Our Demonstration
For a clear visual guide and a concise summary of the key signs and testing methods for ACL tears, watch our clinic's step-by-step demonstration on our YouTube channel:
When to Seek Help
If you suspect an ACL injury based on these signs, it's crucial to seek immediate professional evaluation and care. Prompt attention helps ensure effective treatment, whether through conservative management or surgical intervention, and significantly improves recovery outcomes.
Final Thoughts
Recognising an ACL tear promptly can drastically influence your recovery trajectory. Always consult a healthcare professional for an accurate diagnosis and personalised rehabilitation plan.
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