Adjustable guiding device for imbedding pedicle screw

Abstract

The invention discloses an adjustable guiding device for imbedding a pedicle screw, and belongs to the technical field of the orthopedic surgery instruments, and is used for accurately imbedding the pedicle screw. The technical solution is as follows: a spinous process screw is vertically and fixedly connected with the center of the rear part of the centrum, and used as the criterion for imbedding the pedicle screw. An arc sliding plate is symmetrically distributed at two sides of the spinous process screw. A guiding sleeve is a slender circular rod. The center of the circular rod is provided with a guiding hole. The aperture of the guiding hole is matched with the outer diameter of the pedicle screw. The rod body of the guiding sleeve is perpendicular to the arc sliding plate. The upper part of the guiding sleeve is slidably connected with the arc sliding plate. The pedicle screw is pushed into the centrum along the inner hole of the guiding sleeve. The adjustable guiding device is capable of ensuring two pedicle screws 2 imbedded to two sides of the same centrum to be symmetrically imbedded to the vertebral pedicle of the centrum 1 in the same angle, finally enabling the vertebral fracture block to obtain the firm and symmetrical holding strength, greatly reducing the operation time at the same time, and reducing the X-ray radiation suffered by doctors and patients.

Description

technical field [0001] The invention relates to a guide device for accurately placing pedicle screws, which belongs to the technical field of orthopedic surgical instruments. Background technique [0002] The pedicle is a part of the vertebral arch, which starts from the posterolateral side of the vertebral body, is short and thick, and protrudes perpendicularly to the direction of the vertebral body toward the rear. The upper and lower notches of the adjacent pedicles form the intervertebral foramen, and the intervertebral foramen runs through the nerve. The vertebral foramina of adjacent vertebral bodies forms the spinal canal, which houses the nerves and spinal cord. The pedicle is adjacent to the spinal canal and the intervertebral foramen below, so special attention should be paid to this structure during spinal surgery. In clinical practice, the pedicle screw passes through this position, so accurate placement of the pedicle screw is the key to the success of the ope...

AI Technical Summary

Problems solved by technology

Pedicle screws need to be driven into the pedicle many times with the help of X-ray fluoroscopy, which brings a lot of radiation to the patient and the operator. The most important problem is that the two pedicle screws are often driven asymmetrically. Fixed instability, or even fixed failure

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