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Ankle Disorders

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Straight Leg RaiseAka: Lasegue's Test, Lasegue's Sign, Test of Lasegue

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  1. Technique
    1. Perform in two positions
      1. Supine Low Back Exam
      2. Sitting Low Back Exam
    2. Discrepancy between 2 positions suggests Malingering
    3. Flex hip from 180 to 90 degrees
  2. Criteria for positive test
    1. Sciatic Pain before 70 degrees
    2. Aggravation of pain dorsiflexion of the foot
    3. Relief of pain by knee flexion
  3. Interpretations: What patient experiences
    1. Radiating pain into the legs
      1. Suggests radiculopathy
      2. Higher likelihood findings suggesting radiculopathy
        1. Excruciating sciatica-like pain
        2. Pain occurs at 30 to 40 degrees of leg elevation
    2. Crossed pain into opposite leg
      1. Indicates severe impingement
      2. Almost always due to a large disk herniation
  4. Modifications: Lasegue's Test
    1. Dorsiflex foot while performing straight leg raise
  5. Efficacy
    1. Test Sensitivity good
    2. Non-specific

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