Pedicle screw nailing device

Abstract

The invention provides a pedicle screw nailing device with which physicians can implant pedicle screws conveniently. The pedicle screw nailing device is convenient to operate and safe and reliable in use and characterized in that during use, a connecting head at the head part of a nailing rod is inserted into a pedicle screw, then the head part of a nailing sleeve pipe is screwed into the tail cap of the pedicle screw in a threaded manner to be fully locked through a screwing nut, and finally an anti-quit knob is pushed forwards until a lock button is bounced. The screwing nut is provided with a latch and matched with a neck in the anti-quit knob during work, and meanwhile the lock button is buckled into an octagon on the nailing rod, so that the nailing device and the pedicle screw are effectively connected into a whole and have firmness and no looseness under the action that locking force is not removed. Repeated experiments show that when the neck of the anti-quit knob is divided into 16 equal parts and the nailing rod is designed into the octagon at 30 degrees, the pedicle screw can be most effectively locked.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a pedicle screw setter for implanting pedicle screws during internal fixation operations for treating spinal lesions. Background technique [0002] The application of spinal internal fixation technology has a history of several decades. At present, spinal internal fixators are mostly used for vertebral instability after spinal trauma, spondylolisthesis, degenerative diseases and other single or multiple fractures. There are many types of fixators on the market, but most of them are composed of unidirectional pedicle screws, universal pedicle screws, connecting rods and other corresponding components. [0003] The most critical step in spinal internal fixation surgery is the implantation of pedicle screws. Through years of clinical experience, it has been found that a suitable pedicle screw setter can play a vital role in the operation. Physicians usually connect the ped...

AI Technical Summary

Problems solved by technology

The utility model patent "Vertebral Nail Fixing Device" (authorized announcement number: CN201324288Y) discloses a screw setting device suitable for pedicle screw implantation, but this type of screw setting device is used clinically for the upper vertebral body. The connection between the pedicle screw and the nailer is easy to loosen, and the direction of the pedicle screw is easy to change when the pedicle screw is implanted, which increases the risk of surgery

The invention patent "Nailing Device for Spinal Screws" (application publication number: CN102379738A) discloses a nailing device for spinal screws. Since the slider of this kind of nailing device cannot rotate radially on the connecting rod body, the slider and the screw The locking teeth on the cap are limited by the angle when engaging. The connection between the thread on the head of the nailer and the pedicle screw cannot be completely locked, so that there is looseness between the two. There is a risk of scratching the doctor's gloves during the operation, and this invention does not provide a solution for the implantation of the universal pedicle screw, especially the shaking between the universal pedicle screw and the end cap

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