(A) equipment and materials 1, X-ray imaging equipment: high-definition X-ray machine capable of lumbar spine frontal and lateral television fluoroscopy, C-arm X-ray machine is preferred. 2, X-ray machine room: sterilization equipment, good ventilation, preoperative hand washing preparation room. 3, the nucleus pulposus cut suction device (domestic coarse, traumatic. American imported ones are less traumatic, 1.5mm outer diameter, too expensive) (II) Indications Simple inclusive lumbar disc herniation. (Same as laser) (iii) Relative indications Mild spinal stenosis with disc bulge. (IV) Contraindications 1. lumbar disc prolapse, nucleus pulposus tissue prolapse into the spinal canal; 2. disc degeneration, significant narrowing of the intervertebral space; 3. hypertrophy of the ligamentum flavum, bony spinal stenosis, lateral saphenous stenosis; 4. lumbar disc herniation calcification or ossification; 5. lumbar slipped IIº or more; 6. recurrence of adhesions after surgery; 7. patients who are mentally abnormal, too young or too old to cooperate with treatment; 8. patients with serious Patients with serious organic disorders that cannot tolerate treatment. 9. Patients with prolonged coagulation time or allergies. (E) operation methods and steps of myelotomy 1. Pre-operative medication: half a dose of dorphine combination can be given if necessary. 2.Position: The patient lies on the fluoroscopy bed with a pillow on the abdomen. 3.Positioning: open 8-10 cm next to the midline of the corresponding intervertebral disc and mark it with gentian violet. 4, skin disinfection spread sterile towel. 5.Puncture with positioning needle: the tip of the needle is at an angle of 45º to 60º to the lumbosacral region, and puncture is performed by aligning the corresponding intervertebral disc. 6.Needle tip position: in orthotopic fluoroscopy, the needle tip is located in the midline of the corresponding intervertebral disc, and in lateral fluoroscopy the needle tip is located in the middle and posterior 1/3 of the intervertebral disc. 7.Aspiration of the nucleus pulposus: insert the automatic aspirator into the nucleus pulposus tissue repeatedly, and change the aspiration direction during the aspiration process to aspirate as much of the nucleus pulposus as possible. 8.Pull out the suction needle and fix it with a local pad of alcohol cotton ball and sterile gauze. (F) Postoperative treatment 1. Return to the ward and rest in bed for 5-7 days. 2.Observe body temperature, pulse, respiration and blood pressure. 3.Intravenous antimicrobial drip for 3 to 5 days. 4.Give adjuvant treatment if necessary. 5.You can get up and move around with the help of waist circumference. Adjuvant treatment Give anti-inflammatory and analgesic drugs, nerve root nutrition drugs and dehydration of nerve root edema with sacral canal treatment as needed. Clinical efficacy evaluation 1.Follow-up time: 2, 6, 12 months after surgery, and 1 year in the long term is more appropriate. 2, follow-up content: symptoms, physical symptoms, examination results and preoperative comparison, as an objective basis for efficacy evaluation. The imaging examination, especially the CT review results, is compared with the preoperative period as a reference basis for evaluating the efficacy. Because the amount and size change of the protrusion absorption is not necessarily proportional to the clinical efficacy. 3.Evaluation criteria: At present, Macnab criteria are mostly used, namely: healed, effective and invalid.