Commonly-used percutaneous pedicle screw stick internal fixing system

Abstract

The invention discloses a commonly-used percutaneous pedicle screw stick internal fixing system which comprises a pedicle screw, a longitudinal connection stick, a puncture cone, a guide pin, an expansion core, a screw setting guide sleeve, a hollow flat file, a hollow screw tap, a screw feeder, a stick holder, a screw plug holder, a screwdriver, an opening pressurizer and a torsion resistance sleeve spanner. The opening pressurizer comprises a first opening pressurization arm, a second opening pressurization arm, a first connector, a second connector and a supporting stick. The first connector and the second connector with the adjustable distance are connected to the supporting stick. The first opening pressurization arm is detachably hinged to the first connector, and the second opening pressurization arm is detachably hinged to the second connector. One end of the first opening pressurization arm and one end of the second opening pressurization arm are each provided with a clamping groove. A progressive force application mechanism is connected between the other end of the first opening pressurization arm and the other end of the second opening pressurization arm. The system can be operated flexibly, easily, conveniently and rapidly in a labor-saving mode, can achieve gradual opening or pressurization at different times, and has the powerful and effective opening or pressurization effect.

Description

technical field [0001] The invention relates to the field of medical instruments for orthopedic surgery, in particular to a universal percutaneous pedicle screw and rod internal fixation system. Background technique [0002] Posterior spinal pedicle screw and rod internal fixation is a very mature spinal surgery, which has been widely used clinically. At present, the traditional method is to use a posterior incision. This method requires extensive stripping of the paravertebral tissue structure, which is likely to cause paravertebral muscle damage, ischemia, denervation, muscle necrosis, scar formation, and low back pain, stiffness, etc. sequelae, and the operation has a large trauma, a lot of bleeding, and a long hospital stay, which increases the pain and economic burden of the patient. [0003] In recent years, the percutaneous minimally invasive pedicle screw internal fixation technology has been applied clinically. It has less trauma, less bleeding, faster recovery, sh...

AI Technical Summary

Problems solved by technology

However, the current clinical application of percutaneous pedicle screw-rod system does not have a strong and effective distraction and compression device. Thoracic and lumbar fracture surgery, due to the lack of strong and effective propulsion and reduction equipment, the reduction effect is not good. Although the operation can be completed minimally invasively, it cannot achieve the effect of open surgery

Although some devices have been developed in China, most of them are similar to foreign devices. They are used for in situ fixation of the spine. The effect on thoracolumbar fracture reduction is still not good, and the effect of open surgery is not achieved, which limits minimally invasive thoracolumbar fractures. development of surgery

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