II. Indications
- Assessment for Anterior Cruciate Ligament Rupture
III. Efficacy
- Lachman Test is most sensitive test for ACL Rupture
-
Likelihood Ratio
- Positive Test: 42 (very predictive)
- Negative Test: 0.1
- References
IV. Technique: Patient position
- Knee in 10 to 20 degrees flexion
V. Technique: Examiner position
- Non-dominant hand
- Stabilizes distal femur
- Standard Dominant hand positioning
- Grasps back of proximal tibia posteriorly
- Hold slightly below popliteal space
- Place Thumb over joint line anterolaterally
- Apply slightly above tibial plateau
- Increases sensitivity for Joint Laxity
- Grasps back of proximal tibia posteriorly
- Alternate position for larger thigh (difficult to hold)
- Prop knee up in 10-20 degrees flexion
- Pillow in popliteal fossa
- Allow leg to over edge of table
- Technique
- Use both hands, apply fingers behind proximal tibia
- Apply thumbs to either side of tibial plateau
- Prop knee up in 10-20 degrees flexion
VI. Technique: Test
- Pulling proximal tibia anteriorly and posteriorly
- Compare both sides for end-point laxity
- Images
VII. Interpretation: Positive Test for ACL Rupture
- Lax endpoints on anterior translation