What is intervertebral discoscopic surgery? Discoscopic surgery involves placing an endoscopic metal tube with illumination through an incision the size of 10 mm in the skin, magnifying the image of the inside of the spinal canal on a monitor (64 times), observing the lesion of the disc and its relationship to the nerve roots and dural sac, and removing the herniated disc, while allowing for the enlargement of the spinal canal that has narrowed due to hyperplasia. Therefore, discoscopy has features such as more accurate observation and safer operation. Discoscopy is a high technology that has been developed only in recent years. With this technology, the surgeon can complete the surgery without having to make a drastic cut through the skin and peel away the muscles. The greatest benefits to the patient are less trauma, less bleeding, shorter hospital stay, faster recovery and lower cost. Suitable for intervertebral discoscopy surgery? 1, lumbar disc herniation: lumbar disc herniation, also known as fibrous ring rupture disease, is caused by degenerative changes in the lumbar spine or external forces caused by the lumbar intervertebral disc internal and external pressure imbalance rupture, nucleus pulposus protrusion, thus compressing the nerve roots, blood vessels, spinal cord or cauda equina nerve in the lumbar spine caused by a series of clinical symptoms, mainly manifested as: low back pain, lower limb radiological pain, numbness and abnormal sensation. Medically, lumbar disc herniation is divided into bulging, herniated and prolapsed types, which can also be commonly understood as light, medium and heavy. General discoscopy is suitable for medium or heavy. 2, lumbar spinal canal narrowing: lumbar spinal canal narrowing refers to a series of clinical symptoms caused by the small diameter of the lumbar spinal canal due to congenital development or acquired hyperplasia, which compresses the nerves. Patients mainly manifest as bilateral lower extremity pain, numbness, weakness, cold after walking long distances, and can continue to walk after rest and again appear bilateral lower extremity pain, numbness, weakness, cold, and some patients can not walk more than 100 meters at a time, is a common and frequent disease that seriously affects the quality of life of the elderly. The disc can be clearly visible under the discoscope, and special instruments can be used to remove the growth. Because the operation itself is extremely small and the surgical risk is small, this technique is an excellent choice for the elderly. 3, lumbar instability: lumbar instability refers to the lumbar spine can not maintain the normal alignment relationship when walking upright, the front and back misalignment, resulting in back pain, lower limb pain, numbness, and even serious deformity and disabling pain. Lumbar instability is often accompanied by lumbar spinal stenosis, which is one of the diseases that seriously affect the quality of life of middle-aged and elderly patients. Traditional surgical treatment is posterior spinal decompression, internal fixation with an arch nail, and intervertebral bone graft fusion, but many patients are discouraged and abandon treatment because of the large surgical trauma, bleeding, and high cost. The intervertebral discoscopy allows the implantation of an unstable interbody fusion device to fuse the two vertebral bodies and expand the narrowed spinal canal due to hyperplasia, resulting in a one-time cure, eliminating the need for a second surgery to remove the internal fixation and significantly reducing the surgical trauma and cost.