Overview Posterior lumbar joint disorder, also known clinically as lumbar small joint syndrome, lumbar small joint synovial impingement, and fifth lumbar nerve posterior medial branch extrusion syndrome. With the in-depth research on lumbar spine diseases, it is gradually recognized that the disorders of the posterior lumbar joints are one of the important causes of lumbar leg pain. The onset of the disorder tends to be in middle age, and is more common in women. The posterior joint block is not only a therapeutic tool, but also the most important method for diagnosing posterior joint disorders, and the diagnosis can be confirmed if the pain is reduced or disappears after the injection. Differential diagnosis: The disease is often combined with intervertebral disc pathology, and the two are mutually causative. Operation method Drug composition Depo-Provera 2ml (14mg), 1% lidocaine 5ml, 30% pantethine 1ml. Depo-Provera (compound betamethasone) is a sterilized suspension of dipropyl betamethasone and betamethasone sodium phosphate injection. The soluble betamethasone sodium phosphate is quickly absorbed after injection and works rapidly; betamethasone dipropionate is difficult to dissolve after injection and becomes a reservoir for slow absorption, which continues to work to control symptoms. Effectiveness Patients can obtain immediate pain relief. The pain-relieving effect is usually maintained for 6 months to 1 year, and in a few cases the effect can reach 2 years. If necessary, injections are repeated at 2-3 month intervals. Interventional therapy generally has no significant serious adverse effects.