Straight leg raising test (SLR)

Straight leg raising test (SLR)Created OnApril 18, 2020Last Updated OnOctober 27, 2020byadmin You are here: Main Clinical Examination Straight leg raising test (SLR) < All Topics Table of Contents It is to test the tension in sciatic nerve and to demonstrate nerve root irritation. The patient will be in a supine position, while the knee is fully extended position, lift the affected leg slowly until the patient experience pain. Pain should be shooting down to the heel. Then the angle at the patient starts to experience pain is less than 70-800, it is regarded as SLR positive. The degree is just an estimation and in a case of severe PID, just 10-200 will be very painful. The pain will be reduced if you lower the patient’s leg for a few degrees. Then, if you dorsiflex the ankle or ask the patient to flex the neck, the patient will feel more pain again indicating that pain is coming from tension of the sciatic nerve. “Bowstring sign” is also a confirmation of the sciatic nerve tension. At the point where patient experienced pain, the pain will be reduced if you flex the knee because of less tension on the sciatic nerve. However, when you give pressure over lateral hamstrings to tighten the sciatic or peroneal nerve, the patient will feel pain again. You need to demonstrate Bowstring sign to complete SLR and to exclude other causes of pain such as hamstring tightness. Lift up the patient’s leg slowly until the patient experience pain; make sure the knee joint is extended. Do not forget to look at the patient’s face. Dorsiflex the patient’s foot slowly, ask whether the patient feels more pain on this. Ask the character of pain and radiation towards the heel. This is to differentiate the localized pathology such as paravertebral muscle strain. Slowly flex the knee joint, it will relieve pain Bowstring sign. Give pressure over the back of the thigh, over the...

Continue reading

Please Login/Register to read full article.