The THESSYS minimally invasive foraminoscopic spine technique is a well-established and proven technique that was developed by renowned German spine surgeon Thomas Hoogland and others before being introduced to the world with over a thousand successful procedures. Hoogland and others after performing over a thousand successful procedures before it was introduced to the world. It has some major advantages: the patient requires only local anesthesia, not general anesthesia. The surgery is performed while the patient is fully awake. The reaction can be detected at any time during the surgery . The surgical site is reached through a very small percutaneous incision, minimizing the risk of infection during and after surgery. Unlike microsurgical techniques, the foraminal approach does not require partial removal of the intervertebral ligaments (ligamentum flavum), conus or intervertebral joints (conus laminectomy) in order to locate and remove the herniated or prolapsed nucleus pulposus. It also does not require cutting the trunk muscles, increasing postoperative stability, reducing wound healing pain, less bone tissue is injured, and reducing blood leakage and scar formation in the nerve root area. The recovery from surgery is quick and the patient can return to work and ensure a high quality of life as soon as possible. The unique design of the cannula and surgical instruments allows for the discovery and protection of the nerve root, protection of the epidural and perineural venous system, prevention of venous stasis and chronic neuroedema. In addition, perineural and epidural scar formation can be reduced. It does not damage the good dural and nerve ligament structures and reduces the occurrence of nerve root tethering. The use of a working trocar can reduce paravertebral muscle injury and loss of innervation. The stripping and stretching of the paravertebral muscles during open surgery often results in injury to the paravertebral muscles and loss of muscle innervation. In addition, postoperative segmental instability and slippage can be prevented. In accommodative disc herniations, intradiscal decompression surgery protects the integrity of the posterior annulus fibrosus and posterior longitudinal ligament, thereby reducing the chance of recurrence of postoperative disc herniation. Published international literature has reported success rates of more than 90% at 1 and 2 years postoperative follow-up, with early recurrence rates of less than 5%. In patients with recurrence, the success rate exceeds 84%. Minimally invasive intervertebral foraminoscopic spine technique represents a new concept of minimally invasive surgery. It can perform herniated discs, foraminoplasty and annulus fibrosus repair in all segments from the cervical spine to lumbar 5 and sacral 1. The satisfactory outcome of the surgery can reach 75-90%. Because of its many advantages, foraminotomy is now recognized as the dominant procedure in the field of international spine surgery, along with the well-developed arthroscopy.