Posterior discoscopy involves inserting a 1.7 cm diameter discoscope behind the diseased lumbar spine plate and removing the herniated disc endoscopically. Because it can be done under the guidance of a slim digital endoscope without the large incision and extensive stripping of normal tissues such as muscles and ligaments around the lumbar spine necessary for conventional surgery, it is popular among patients who are afraid of surgery and suffer from back and leg pain. The spinal surgery department of Yongchuan Hospital of Chongqing Medical University, Lu F Peng Technical advantages: 1, minimally invasive: general skin trauma is about 1 cm to 1.8 cm, which is one tenth of the conventional surgery; 2, less bleeding: open surgery is sometimes difficult to stop bleeding, plus the stripping of the lumbar back muscles, bleeding is large, usually requiring a routine blood transfusion of 300-600 ml. 3.Safety: Since the operation is followed by the micro digital camera system of the discoscope, and the operating surface is magnified 64 times and projected on the display through fiber optic transmission, the neurovascular is clearly visible, so it is not easy to damage the nerve roots and avoid accidental damage of the operation; 4.Fast recovery: you can get out of bed and walk after 6 hours of minimally invasive treatment, and you can be discharged after 3 days, and the symptoms of back and leg pain can be relieved immediately. 5. No recurrence after surgery: minimally invasive discoscopic treatment is extremely traumatic, eliminating the problem of postoperative adhesions and making it difficult to recur after cure. Indications: 1. Patients with lumbar disc herniation with first onset, severe pain in the lower limbs, difficulty walking, difficulty sleeping at night, and unsatisfactory results after conservative treatment; 2. The patient has a request for surgical treatment; 4. Regardless of the length of history, once out of obvious nerve paralysis damage, such as the dorsal extensor muscle strength of the big toe below grade 4; 5. Central disc herniation combined with cauda equina damage, such as urinary and fecal dysfunction, CT shows no obvious calcification of the intervertebral disc or posterior longitudinal ligament; 6. Although the history and symptoms and signs of disc herniation are not typical, CT, spinal or epidural angiography, MRI as well as intervertebral discography and other examinations reveal a huge herniated disc. The Department of Orthopedics of Yongchuan Hospital of Chongqing Medical University has been performing this procedure since the 1990s, and Dr. F. Peng Lu of the Department of Orthopedics (Spine Surgery) has accumulated extensive surgical experience in this technique. Case presentation 1: Minimally invasive treatment of L4-5 disc herniation by posterior discoscopy A 42-year-old male with low back pain and pain radiating to the right lower extremity for 2 years, CT showed L4-5 disc herniation. 1.Preoperative CT showed herniated disc on the right side of L4/5 2.Surgical diagram 3.Intraoperative positioning 4.Insertional access 5.Debridement of ligamentum flavum 6.Removal of herniated disc 7.Postoperative skin surgical incision