Which of the following statements is true regarding a Gr II ACL injury1 pointLachman test - lax with end feel presentLachman test - (-ve), no laxity and firm end feel presentLachman test - (+ve) with severe laxity and no end feelAnterior drawer test +ve and no end feel present
Question
Which of the following statements is true regarding a Gr II ACL injury1 pointLachman test - lax with end feel presentLachman test - (-ve), no laxity and firm end feel presentLachman test - (+ve) with severe laxity and no end feelAnterior drawer test +ve and no end feel present
Solution
The statement that is true regarding a Grade II Anterior Cruciate Ligament (ACL) injury is: "Lachman test - lax with end feel present."
Here's why:
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Lachman test - lax with end feel present: In a Grade II ACL injury, there is partial tear of the ligament. This results in some laxity (looseness) when the Lachman test is performed, but there is still an end feel because the ligament is not completely torn.
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Lachman test - (-ve), no laxity and firm end feel present: This would suggest a healthy, intact ACL, not a Grade II injury.
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Lachman test - (+ve) with severe laxity and no end feel: This would suggest a Grade III injury, where the ACL is completely torn, resulting in severe laxity and no end feel.
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Anterior drawer test +ve and no end feel present: This could suggest a complete tear of the ACL (Grade III), but the Anterior Drawer Test is not as reliable as the Lachman test. It can give false positives or negatives, especially if the patient's muscles are not completely relaxed.
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