title: [Physical diagnosis--signs of lumbosacral irritation].
abstract: Lasègue's test is a clinical test to demonstrate lumbosacral radicular irritation. Published evidence gives a high sensitivity (0.80-0.97) for a low lumbar disc protrusion but a low specificity (about 0.4) since this test is also positive in ischialgia due to other causes. A crossed Lasègue test had a high specificity (> or = 0.90) for presence of a (ruptured) disc prolapse. There is little or no literature about the reversed Lasègue and provocation by intra-abdominal pressure. The reproducibility of the Lasègue test is moderate (kappa about 0.55).
mesh_terms: D005260:Female; D006801:Humans; D007405:Intervertebral Disc Displacement / Q000175:diagnosis*; D008159:Lumbar Vertebrae; D008161:Lumbosacral Region; D008297:Male; D010808:Physical Examination / Q000379:methods*; D011843:Radiculopathy / Q000175:diagnosis*; D015203:Reproducibility of Results; D012447:Sacrum; D012680:Sensitivity and Specificity