Pedicle screw and spine percutaneous internal fixing system

Abstract

The invention discloses a pedicle screw, which comprises a screw rod, a fixing cap and a screw plug, wherein the screw rod is provided with an external screw thread part, the fixing cap is hinged with the tail part of the screw rod, the top end of the fixing cap is provided with an internal screw thread fixing hole, the screw plug is arranged in the internal screw thread fixing hole, a connecting rod installing hole of which the axis is coincided with the normal line of the surface of the fixing cap is also arranged on the fixing cap, the pedicle screw also comprises two arc-shaped leaf springs symmetrically arranged on the fixing cap, one ends of the leaf springs are fixedly connected with the fixing cap, and the other ends of the leaf springs are outwards unfolded. After the pedicle screw provided by the invention is fixedly arranged on the vertebral body, the leaf springs expand open the peripheral muscle, skin and other tissue, surgery doctors can touch through fingers under the direct viewing condition for placing in the connecting rod, and the problems of complicated operation, long time and high difficulty caused by poor view sight of the existing spine percutaneous internal fixing system are solved. The invention also provides a spine percutaneous internal fixing system.

Description

technical field [0001] The invention relates to the technical field of medical instruments, more specifically, to a pedicle screw, and also to a spinal percutaneous internal fixation system. Background technique [0002] Spinal pedicle screw internal fixation technology is a very mature spinal surgery technology, which is widely used in the treatment of spinal trauma and degenerative diseases such as spinal fractures, scoliosis and spondylolisthesis. The traditional pedicle screw internal fixation technique requires an open posterior approach. Although the spinal deformity is well corrected and the stability of the spine is maintained, it requires extensive tissue incision and long-term pulling of the surrounding tissue during the operation. , resulting in a large surgical trauma and a lot of blood loss during the operation. At the same time, the excessive stretching and destruction of the paraspinal muscles during the operation, the ischemic necrosis and fibrosis of the lo...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a pedicle screw and a spinal percutaneous internal fixation system to solve the problem of complicated operation and long time during the operation of the existing spinal percutaneous internal fixation system due to poor operating vision. , difficult problems

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