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 interior 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. Intervertebral discoscopy is a high technology that has been developed only in recent years. With this technology, the surgeon does not have to cut the skin and peel the muscle to complete the surgery, and the patient benefits most from less trauma, less bleeding, shorter hospital stay, faster recovery, and lower cost. What diseases are suitable for discoscopic surgery? 1, lumbar disc herniation lumbar disc herniation, also known as fibrous ring rupture, is caused by degenerative changes in the lumbar spine or external forces that cause 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 radiated 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. Generally discoscopy is suitable for medium or heavy. 2. Lumbar spinal canal stenosis Lumbar spinal canal stenosis refers to a series of clinical symptoms caused by compression of nerves due to small lumbar spinal canal diameter caused by congenital development or acquired hyperplasia. Patients mainly show soreness, numbness, weakness and coldness in both lower extremities after walking long distances, and can continue to walk after rest and have soreness, numbness, weakness and coldness in both lower extremities again, and some patients can walk up to 100 meters at a time. 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 fact that the lumbar spine cannot maintain normal alignment when walking upright and becomes misaligned, resulting in back pain, lower limb pain, numbness, and even severe 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 give up 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.