III. Efficacy

  1. Lachman Test is most sensitive test for ACL Rupture
  2. Likelihood Ratio
    1. Positive Test: 42 (very predictive)
    2. Negative Test: 0.1
  3. References
    1. Solomon (2001) JAMA 286:1618

IV. Technique: Patient position

  1. Knee in 10 to 20 degrees flexion

V. Technique: Examiner position

  1. Non-dominant hand
    1. Stabilizes distal femur
  2. Standard Dominant hand positioning
    1. Grasps back of proximal tibia posteriorly
      1. Hold slightly below popliteal space
    2. Place Thumb over joint line anterolaterally
      1. Apply slightly above tibial plateau
      2. Increases sensitivity for joint laxity
  3. Alternate position for larger thigh (difficult to hold)
    1. Prop knee up in 10-20 degrees flexion
      1. Pillow in popliteal fossa
      2. Allow leg to over edge of table
    2. Technique
      1. Use both hands, apply fingers behind proximal tibia
      2. Apply thumbs to either side of tibial plateau

VI. Technique: Test

  1. Pulling proximal tibia anteriorly and posteriorly
  2. Compare both sides for end-point laxity
  3. Images
    1. orthokneelachman.jpg

VII. Interpretation: Positive Test for ACL Rupture

  1. Lax endpoints on anterior translation

Images: Related links to external sites (from Google)

Ontology: Lachman test response (C0231752)

Concepts Diagnostic Procedure (T060)
SnomedCT 27556003
English Lachman's test, Lachman test response, Lachman's test response (observable entity), Lachman test, Lachman test response (observable entity), Lachman's test response, lachmans test, lachman test, lachman's test
Spanish prueba de Lachman, prueba de Lachman (entidad observable), respuesta de la prueba de Lachman (entidad observable), respuesta de la prueba de Lachman