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Lachmans Test

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Other Names

Lachmans Test
  • Lachman Test
  • Lachman’s Test


Lachmans Test


  • Patient is supine in examination table
  • Knee is flexed to 20-30°
  • One hand is placed behind the tibia, the other on the patients thigh
  • The examiner should attempt to translate the tibia anteriorly relative to the femur
  • Comparison should be made to the unaffected knee
  • Positive exam is
    • Anterior translation
    • with or without an end-point
    • >2mm anterior translation



  • Katz et al[1]
    • Injury less than 2 weeks prior to examination (acute)
      • Sensitivity: 77.7%
      • Specificity: >95%
    • Injury greater than 2 weeks prior to examination (subacute, chronic)
      • Sensitivity: 84.6%
      • Specificity: >95%
  • Benjaminse et al Meta-analysis of studies looking at value of special tests[2]
    • Sensitivity of 85% (95% CI, 83–87)
    • Specificity of 94% (95% CI, 92-95)

See Also


  1. Katz JW, Fingeroth RJ. The diagnostic accuracy of ruptures of the anterior cruciate ligament comparing the Lachman test, the anterior drawer sign, and the pivot shift test in acute and chronic knee injuries. The American Journal of Sports Medicine 1986;14:88-91.
  2. Benjaminse, Anne, Alli Gokeler, and Cees P. van der Schans. "Clinical diagnosis of an anterior cruciate ligament rupture: a meta-analysis." Journal of orthopaedic & sports physical therapy 36.5 (2006): 267-288.
Created by:
John Kiel on 9 July 2019 13:16:44
Last edited:
5 October 2023 19:36:00