◆Features of radiofrequency ablation myeloplasty 1.New minimally invasive percutaneous disc decompression; 2.Low working temperature: 40-70℃; 3.Plasma cutter head reduces the volume of nucleus pulposus in the nucleus pulposus by ablating and thermocoagulating; 4.Accurate and controllable ablation and thermocoagulation process. Principle of ◆Radiofrequency ablation myeloplasty 1, cutting and ablation: (1) Make the electrolyte into low-temperature plasma state, and form a thin plasma layer with a thickness of 100 microns in front of the electrode. (2) The powerful electric field also makes the free charged particles in the plasma thin layer obtain enough kinetic energy to interrupt the molecular bond, so that the target tissue cells are disintegrated in molecular units, and the cutting and ablation effect is formed at low temperature. Zhang Tao, Department of Orthopedics, The First Central Hospital of Tianjin, China 2, solid contraction and hemostasis: when the value of electric field energy is lower than the threshold value of plasma generation, the resistance of the tissue will lead to thermal effect, which will result in tissue contraction or hemostasis. ◆Indications 1, lumbar spine: (1) due to lumbar intervertebral disc pathology caused by low back pain or low back pain patients, by more than 3 months of non-surgical treatment is ineffective; (2) bulging discs and mild-to-moderate herniated discs, the protruding discs do not exceed the diameter of the spinal canal of 30%; (3) lumbar intervertebral disc degeneration caused by low back pain, the intervertebral disc height reduction of not more than 50% of the person; (4) lumbar discography and pain provoked by test Lumbar intervertebral disc rupture caused by lumbar intervertebral discogenic low back pain confirmed by lumbar intervertebral discography and pain evoking test. 2, Cervical spine: (1) Chronic dizziness, nausea, numbness and weakness of limbs, neck and shoulder pain, etc.; (2) Cervical spondylosis of cervical intervertebral disc origin. Contraindications 1, lumbar spine: (1) previous intervertebral disc surgery; lumbar spine fractures, tumors and infectious diseases; (2) lumbar spinal stenosis; (3) intervertebral disc height less than 50% of normal. 2, Cervical spine: (1) severe cervical spinal stenosis; (2) cervical metastatic tumors; (3) cervical fractures and tumors; (4) significant intervertebral space stenosis; (5) multi-system or organ failure. Figure 1-A After thermocoagulation, the edges of the ablation channel appear neat and free of necrosis, with the annulus fibrosus and endplates intact. The nerve tissue and spinal cord collagen tissue are normal; the nerve roots close to the ablation area show no signs of necrosis or damage. Figure 1-B Schematic diagram of lumbar myeloplasty position and puncture needle channel Figure 1-C Positioning of lumbar myeloplasty in front and side X-ray Figure 1-D Comparison of MRI before and 6 months after myeloplasty Figure 1-E Lumbar lumbar spine ablation was performed by percutaneous puncture without a surgical incision Figure 2-A Schematic diagram of cervical myeloplasty puncture position Figure 2-B Puncture position of the cervical vertebrae Figure 3-C Fluoroscopic positioning of the cervical spine in front and side view of cervical myeloplasty Fig. 4 Cervical 3-4 herniation Fig. 5 Herniated disc retraction 3 months after cervical 3-4 disc ablation