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Sensitive and Specific Findings

Specific Findings

Anterior Cruciate Ligament Tear: Sensitivity and Specificity

Introduction: None written.

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Tags: Musculoskeletal Tag this Diagnosis.

The sensitivity and specificity of findings for Anterior Cruciate Ligament Tear are listed below. See the left navigation bar to change the display.

Sensitive and Specific Findings

Finding SensitivitySpecificity Comments, Study
Lachman Test Edit 87%93%

pull anteriorly when knee is flexed at 30 degrees

Study: Ann Intern Med. 2003 Oct 7;139(7):575-88. PMID: 14530229

MRI Edit 87%91%

Study: Ann Intern Med. 2003 Oct 7;139(7):575-88. PMID: 14530229

Systematic review. Radiology 2003 PMID: 12601211

Specific Findings

Finding SensitivitySpecificity Comments, Study
Pivot Test Edit 61%97%

Fully extend the knee, rotate the foot internally. Apply a valgus stress while progressively flexing the knee, watching and feeling for translation of the tibia on the femur.

Study: Ann Intern Med. 2003 Oct 7;139(7):575-88. PMID: 14530229

Anterior drawer test as measured by the KT-1000 arthrometer Edit 77%90%

The sensitivity and specificity will vary based on the amount of force applied and the threshold chosen for anterior tibial motion. These numbers above are for a 30 lbs test with >3mm as diagnostic threshold for ACL tear.

Study: PMID 19398799

Anterior Drawer Test Edit 48%87%

pull anteriorly when the knee is flexed at 90 degrees

Note that when the anterior drawer test has been studied using the KT-1000 arthrometer. This provides an objective measure to the anterior drawer test. When performed with the KT-1000 arthrometer, the sensitivity and specificity will vary based on the amount of force applied and the threshold chosen for anterior tibial motion. For a 30 lbs test with >3mm as diagnostic threshold for ACL tear the sensitivity and specificity have been reported as 77% and 90%.

The anterior drawer test has been studied with objective measurements using ultrasonography. The sensitivity and specificity were reported as 96% and 98% though the cut off displacement distance appears to have been decided upon after the data was examied. See PMID 10401653

Study: Anterior drawer test: Ann Intern Med. 2003 Oct 7;139(7):575-88. PMID: 14530229

KT-1000 Arthrometer: PMID 19398799

Ultrasound: PMID 10401653