Percutaneous minimally invasive pedicle screw/rod internal fixation system

Abstract

The invention provides a percutaneous minimally invasive pedicle screw / rod internal fixation system. The system comprises a pedicle screw, a longitudinal connecting rod, a locating needle tube, a guide needle, a dilating core, a placed screw guide sleeve, a screw loader, a rod holder, a distraction pressurizer, arm fracture devices and a screw loading base, wherein the locating needle tube and the guide needle are used for determining the position of a placed screw; the dilating core is used for dilating a screw placement channel; the arm fracture devices are used for fracturing long arms of the pedicle screw; the pedicle screw comprises a screw body, a screw base, two fracturable long arms and a plug screw; the screw body is connected with the screw base; the two fracturable long arms are oppositely and fixedly connected to the screw base to form a U-shaped structure in which the longitudinal connecting rod can be embedded; the two fracturable long arms extend out of the skin incision; and the plug screw is screwed in the U-shaped structure formed by the two fracturable long arms so as to compress the longitudinal connecting rod. By utilizing the system provided by the invention in the posterior thoracolumbar minimally invasive surgery, the trauma is little, and the haemorrhage is less; and the system is simple and flexible to operate and can achieve the effect of open surgery.

Description

technical field [0001] The invention belongs to the field of orthopedic surgery medical instruments, in particular to a percutaneous minimally invasive vertebral pedicle screw rod internal fixation system. Background technique [0002] The pedicle screw technique has the advantages of three-column fixation and is a very mature spinal surgery technique that has been widely used. The traditional method is to use a posterior incision for open surgery, which requires extensive stripping of paraspinal muscles, ligaments and other structures, which can easily lead to loss of innervation of paraspinal muscles, and patients are prone to sequelae such as low back pain and stiffness. The operation has a large trauma, a lot of bleeding, and a long hospital stay, which increases the patient's pain and financial burden. In recent years, percutaneous minimally invasive pedicle screw technology has been applied clinically, with less trauma, less blood loss, faster recovery, and achieved c...

AI Technical Summary

Problems solved by technology

[0003] The present invention solves the technical problems of complicated design of hollow pedicle screw instruments, complicated surgical operation of non-hollow pedicle screws, difficulty in placing nails and rods precisely, and lack of effective distraction and pressure tools in the prior art.

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