Pedicle screw positioning and guiding device

Abstract

The invention relates to the field of medical instruments, in particular to a pedicle screw positioning and guiding device. The pedicle screw positioning and guiding device comprises a rack, a lifting frame, a first locking device, a sliding frame, a second locking device, a rotation rod, a third locking device, a distance measuring device and two guiders. Each guider comprises a sliding block and a guiding cylinder. The distance measuring device comprises an installation base and a measuring scale. The axis of the measuring scale is perpendicular to the axis of the rotation rod. The axis of the measuring scale and the axes of the guiding cylinders are located on the same plane. The axis of each guiding cylinder hinged shaft is perpendicular to the plane where the axis of the corresponding guiding cylinder is located. The positioning and guiding device further comprises a fourth locking device, a fifth locking device, a sixth locking device, a positioning linkage device, a first angle measuring device and a second angle measuring device. The positioning and guiding device can adjust the guiders to the position which is worked out through a computer in three-dimensional space, and therefore a pedicle screw is guided, accurate implanting of the pedicle screw is achieved, the device is precise in positioning, and the manufacturing cost is low.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to a pedicle screw positioning and guiding device. Background technique [0002] Pedicle screws play an important role in the treatment of spinal trauma reduction and deformity correction, and the key to the success of pedicle screw internal fixation is whether the screw can be accurately inserted through the pedicle without damaging the nerve vertebral body . [0003] How to accurately control the position, direction and angle of the pedicle screw during the operation determines whether it can enter the vertebral body smoothly, which involves the positioning and guidance of the pedicle screw. [0004] The current methods for pedicle screw positioning can be divided into two categories: [0005] One is preoperative positioning, which uses preoperative CT and MRI scans to determine the location of the lesion, and then relies on the professional knowledge of the doctor to plan the...

AI Technical Summary

Problems solved by technology

[0006] This is currently the most common practice in clinical practice. However, this method has large errors, and it needs to refer to the X-ray fluoroscopy images during the operation to constantly correct the actual nail insertion route, which will greatly increase the complexity of the operation and increase the operation time. Radiation exposure increases the operating time and puts high demands on the surgeon

[0007] In addition, if multiple X-ray fluoroscopy is performed during the operation, the radiation dose of patients and medical staff will be increased, which will cause harm to the human body.

[0008] The other is intraoperative positioning and navigation, which is one of the most advanced positioning methods in the world. It can know the real-time information of the probe position and guide precise surgery. However, it is expensive and difficult to popularize. Ordinary municipal hospitals, Most county-level hospitals are unable to purchase

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