Monday, January 28, 2013

Straight Leg Raise Test (Lasegue’s Test)

Purpose: To assess for impingement of the dura and spinal cord nerve roots of the lower lumbar spine. The test targets the sciatic nerve, tibial nerve, sural nerve, common peronal nerve and nerve root (disc prolapse).

Patient/Therapist Position and Procedure: Basic SLR; Pt is lying supine with leg straight. PT then flexes hip until pt complains of pain or tightness in the lower back or radicular pain down the posterior portion of the tested leg. PT then lowers leg (which should slowly relieve pain). If no comparable symptoms occur the PT can proceed to next SLR modification.

*Note- Unaffected leg should always be tested first.


Interpretation: + indication when pain is reproduced with comparable symptoms, radicular pain in posterior portion of tested leg, and if the pain is relieved when the PT lowers the tested leg.


Statistics: Sensitivity 33%, Specificity 87% , Reliability 0.93, Validity 98%





References:

Magee, David and Sueki, Derrick. Orthopedic Physical Assessment Atlas and Video: Selected Special Tests and Movements. Musculoskeletal Rehabilitation Series. 2011.

Capra, Francesco, Vanti, Carla, et. Al. Validity of the Straight-Leg Raise Test for Patients with Sciatic Pain with or without Lumbar Pain Using Magnetic Resonance Imaging Results as a Reference Standard.” Journal of Manipulative and Physiological Therapeutics. Volume 34, Number 4. May 2011. Pgs. 231-238.

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