Laser decompression is the use of high temperatures (up to 200°C locally) to ablate or vaporize the nucleus pulposus tissue within the disc, resulting in a reduction in volume and a decrease in intradiscal pressure. Studies have shown that smaller volume changes within the disc can lead to larger pressure changes, and pressure studies on discs in fresh human specimens have shown that the average decrease in intradiscal pressure after laser vaporization is 156.09 ± 68.78 Kpa. Laser ablation generally forms an elliptical cavity within the disc along the long axis of the fiber, and the authors’ experiments and data show that the long-axis diameter of the elliptical cavity within the nucleus pulposus is determined by the exposed fiber The experiments and data show that the long-axis diameter of the oval cavity in the nucleus pulposus is determined by the length of the exposed fiber, while the short-axis diameter is controlled by the total energy of the laser light delivery, with a maximum cross-sectional area of 5mm×2mm when the length of the exposed fiber is 5mm and the total energy is 640J, and a maximum cross-sectional area of 10mm×3.5mm when the length of the exposed fiber is 10mm and the total energy is 1000J. This experimental data has guiding significance when designing parameters for laser treatment of cervical and lumbar discs. (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, power of not less than 15W semiconductor laser machine; 4, optical fiber; 5, lumbar intervertebral disc puncture needle that can pass through the optical fiber; 6, Y-joint ( connected to the puncture needle); 7, 20ml empty needle or pressure pump. (B) Indications Restrictive lumbar disc herniation (bulging, the annulus fibrosus is not broken, or the disc annulus fibrosus has not been completely ruptured disc pressure? Ozone experiment, ozone injection does not go in can be decompression. CT can roughly determine the bulge or herniation, MRI can better show the simple fibrous annulus?) (C) contraindications 1, lumbar disc prolapse, nucleus pulposus tissue 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. (D) operation methods and steps 1, turn on the 15W semiconductor laser machine power supply, adjust the required indicators, using the intermittent pulse method, exposure 1S, intermittent 1S. 2, the fiber end connected to the laser generator, the other end of the fiber through the Y-joint through the lumbar penetration needle, more than the tip of the needle 3-5mm?，the exposed tip of the fiber outer membrane stripped, and the Y-joint fixed in the fiber, start the test light source, the fiber emits a red ring of light. The fiber emits a red ring aperture, the fiber is normal standby state. Then remove the fiber with Y-joint from the lumbar puncture needle. 3, the patient lies prone on the examination table, abdominal pad a pillow, fluoroscopic positioning puncture point, the corresponding vertebral space next to the midline 8 ~ 10cm, with gentian violet on the skin for marking. 4, local skin disinfection lay sterile towel, with 1% lidocaine for local anesthesia. 5.Puncture with lumbar intervertebral disc puncture needle through the marking point and lumbosacral at an angle of 45º～60º to the corresponding vertebral space, L5-S1 still need to tilt 20º～25º angle to the cephalad, when the needle tip enters the intervertebral disc fibrous ring there is astringent feeling, after passing through the fibrous ring there is a feeling of falling out. 6, needle tip location: orthogonal fluoroscopy needle tip is located near the midline, lateral fluoroscopy needle tip is located in the disc in the posterior 1/3 junction. 7.Fiber optic fixed with Y-joint is slowly fed into the nucleus pulposus along the puncture needle, and the Y-joint is fixed by connecting with the puncture needle. 8.Foot the laser machine switch for pulpal nucleus pneumatization. During the process, the patient is frequently asked whether there is heat and swelling in the lumbar region, and when there is heat and swelling, the foot brake is released to rest, and the hyperthermic gas is extracted with an empty needle through the Y-joint. The total energy was controlled at 600 to 1800(?) depending on the patient’s height and weight. joules or so. Do not exceed 1000 joules? 9. Turn off the power at the end of the treatment, remove the fiber, pull out the puncture needle, and dress the needle eye with a band-aid. (E) Postoperative reactions and treatment 1. Return to the ward and rest in bed for 5-7 days. 2.Patients rest in bed after surgery. 3.Postoperative reactions are mild, with only slight heat and swelling pain, which can disappear on their own without special treatment.