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Not to be confused with the passive leg lift test. The Straight Leg Raise The straight leg test is sometimes used to diagnose a herniated disc. Targeting a herniated disc Straight leg elevation is a test that can be performed during a medical examination with either the patient actively lifting the leg or the physician passively raising the leg. If the patient actively performs simple leg raises, this is a functional endurance test of the leg, especially the rectus femoris portion of the quadriceps (simultaneous testing of hip flexion and knee extension strength). Performed passively (also called Lasegues sign, Lasegues test, or Lazarevichs sign), it is used to determine if a patient with low back pain has nerve root tenderness, often located at the level of the L5 (fifth lumbar nerve). The rest of this article is about the passive version of the test. Technique While the patient is lying on his back on the examination table or on the examination floor, the doctor lifts the patients leg with the knee extended. An option is to raise the leg while the patient is sitting. However, this reduces the sensitivity of the test. 2 To make this test more accurate, you can bend your ankle back and flex your cervical spine. This increases the stretching of the nerve root and dura mater. edit Interpretation If the patient experiences pain in the buttock, more specifically pain radiating down the leg (radiculopathy), when the leg is extended at an angle of 30-70 degrees, the test is positive and a herniated disc is a possible cause of the pain. A negative test indicates a possible other cause of back pain. If it only causes back pain, the test is negative. Since this is often misunderstood, it makes sense to add an explanation. For example: Test the right leg positive on the left side, repeating the patients leg irradiation symptoms. causes pain. (sacral or contralateral simple leg raise): sensitivity 29%, specificity 88% Lasegues sign Lasegues sign is named after Charles Lasegue (5). In 1864, Lasegue described the symptoms of pain in the lower back when the knee is straightened when the leg is already raised. In 1880, the Serbian physician Laza Lazarević described the straight leg raise test as it is used today, which is why this sign is often referred to as the Lazarević sign in Serbia and some other countries. See also femoral nerve stretch test. ^ Waddell G McCulloch J.A. Kummel E. Venner R.M. (1980). Non-organic physical symptoms of low back pain. Spine. 5(2):117-25. doi: 10.-198003000-00005. PMID. S2CID 29441806. ^ Rabin A, Gersten PS, Karauski P, Bunker C, Potter DM, Welch WK (2007). Sensitivity of the straight leg raise test in the seated position compared to the straight leg raise test from the backNot to be confused with the passive leg lift test. Straight leg lift The straight leg test is sometimes used to diagnose a lumbar disc herniation. The purpose of determining a herniated disc. The straight leg raise is a test that can be performed during physical examination, with the leg actively raised by the patient or passively raised by the physician. If the patient actively lifts the straightened leg, it is a test of the functional strength of the leg, especially the rectus femoris muscle (simultaneous test of hip flexion and knee extension). In passive conduction (also called Lasegues sign, Lasegues test, or Lazarevics sign), it is used to determine if a patient with low back pain has tenderness in the main nerve root, often located at the level of L5 (fifth lumbar spinal nerve). The rest of this article is about the passive version of the test. Technique With the patient supine on the examination table or examination floor, the doctor lifts the patients leg while the knee is extended. An option is to raise the leg while the patient is sitting. However, this reduces the sensitivity of the test. 2 For a more precise examination, you can bend your ankle and flex your cervical spine. This increases the stretching of the nerve root and dura. edit translation Interpretation If the patient experiences sciatica pain, more specifically pain radiating down the leg (radiculopathy) when the leg is extended at an angle of 30 to 70 degrees, then the test is positive and the probable cause is a herniated disc.3 A negative test suggests another likely cause of your back pain. If it only causes back pain, the test is negative. Since this is often misunderstood, its worth adding an explanation. For example, the straight leg test is positive on the left side, reproducing the symptoms of the patients radiating leg. (crossed or contralateral straight leg raise): sensitivity 29%, specificity 88% Lasegues sign Lasegues sign is named after Charles Lasegue (5). In 1864, Lasegue described symptoms of pain developing in the lower back when extending the knee when the leg was already lifted. In 1880, the Serbian physician Laza Lazarević described the straight leg raise test in the form it is used today, which is why the sign is often called Lazarevićs sign in Serbia and some other countries. See also Femoral Nerve Tension Test. ^ Waddell G McCulloch J.A. Kummel E. Venner R.M. (1980). Non-organic physical symptoms of low back pain. Spine. 5(2):117-25. doi:10.-198003000-00005. PMID. S2CID 29441806. ^ Rabbi A, Gersten PS, Karauski P, Bunker C, Potter DM, Welch WK. (2007). Sensitivity of the sitting straight leg raise test compared to the straight leg backward test

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