Lasseger's sign

The Lasseg sign is also called the straight leg raising test, the Lasegue sign, which is the stimulation of the nerve roots. During the examination, the patient was lying on his back and the lower limbs were straight. The physician placed the hand on the knee joint to keep the lower limbs straight and the other hand lifted the lower limbs. Normal people can raise 80 degrees to 90 degrees, such as raising less than 70 degrees, and there is radioactive pain on the back side of the lower limbs, which is positive for the straight leg raising test. Check the other side in the same way. Basic Information Specialist classification: growth and development check classification: neuroelectrophysiology Applicable gender: whether men and women apply fasting: not fasting Analysis results: Below normal: Normal value: no Above normal: negative: Normal when negative. Positive: Lasegue is positive for sciatica, lumbar disc herniation or lumbosacral radiculitis. Tips: Do not do excessive exercise for a few days before the test to prevent the pain caused by leg muscles. Normal value Normal people can raise more than 70 degrees. Clinical significance Abnormal results: Lasegue (Lasegue) sign positive in sciatica, lumbar disc herniation or lumbosacral radiculitis. In order to increase the tensile strength of the sciatic nerve, the ankle joint can be passively dorsiflexed. If there is disc herniation, the stringer pain of the sciatic nerve will be significantly aggravated. The person in need of examination has a condition of sciatica, lumbar disc herniation or lumbosacral radiculitis. Positive results may be diseases: sciatica, lumbar disc herniation, spinal radiculitis considerations Taboo before the test: Do not do excessive exercise for a few days before the test to prevent the leg muscles from sore and affect the test results. Requirements for examination: If the doctor raises the radiation pain from top to bottom when lifting the lower limbs, he should inform the doctor in time so that the doctor can make the correct diagnosis and treatment. Inspection process During the examination, the patient was lying on his back and the lower limbs were straight. The physician placed the hand on the knee joint to keep the lower limbs straight and the other hand lifted the lower limbs. Normal people can raise more than 70 degrees. If the height is less than 30 degrees, there will be radiation pain from top to bottom, which is positive for straight leg raising test. Check the other side in the same way. Not suitable for the crowd The lower limb itself is damaged and deformed. Adverse reactions and risks May cause muscle soreness.

The material in this site is intended to be of general informational use and is not intended to constitute medical advice, probable diagnosis, or recommended treatments.