Full-spine vertebral arch pedicle positioning sleeve

Abstract

The invention relates to a full-spine vertebral arch pedicle positioning sleeve. The positioning sleeve comprises a guide sleeve, a horizontal position angle positioning index dial, a bi-directional positioning nonius and a multifunctional positioning part, the index dial is in a circle shape and is fixed to the guide sleeve, and the circle center of the index dial coincides with the entry point of the guide sleeve; the bi-directional positioning nonius is in an L shape and is arranged in the radial direction of the index dial, the bi-directional positioning nonius is connected with the index dial and the multifunctional positioning part respectively, and the multifunctional positioning part is in a T shape and can indicate the level; a sagittal position angle positioning scale is marked at the connected end of the multifunctional positioning part and the bi-directional positioning nonius, the bi-directional positioning nonius can position a horizontal position angle along the index dial in a sliding mode and can rotate along the multifunctional positioning part and position a sagittal position angle, and the bi-directional positioning nonius slides along the index dial and is perpendicular to the rotation surface of the multifunctional positioning part. According to the full-spine vertebral arch pedicle positioning sleeve, the three-dimensional direction wherein vertebral arch pedicle screws are implanted can be quantized, the limit of a spinal segment and the limit of an anatomical structure are avoided, and the accuracy of implantation and positioning of the vertebral arch pedicle screws is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of pedicle screw implantation operation auxiliary medical instruments, in particular to a whole spine pedicle positioning sleeve. Background technique [0002] Pedicle screw (PS) technology has developed rapidly since its introduction in the 1980s, and has been widely used in spinal degeneration, spondylolisthesis, spinal stenosis, vertebral fracture, deformity, bone metastases, and spinal loss. Surgical treatment of stable diseases. [0003] At present, most hospitals still adopt the traditional implantation method. The pedicle screw is slowly implanted according to the operator's hand feeling, or the guide pin is inserted to take X-ray film to determine the position before implantation. The sagittal angle (SSA) and horizontal angle (TSA) of the root, the implantation direction of the pedicle screw is difficult to locate accurately, and there are problems such as the pedicle screw piercing the pedicle and ...

AI Technical Summary

Problems solved by technology

[0003] At present, most hospitals still adopt the traditional implantation method. The pedicle screw is slowly implanted according to the operator's hand feeling, or the guide pin is inserted to take X-ray film to determine the position before implantation. The sagittal angle (SSA) and horizontal angle (TSA) of the root, the implantation direction of the pedicle screw is difficult to locate accurately, and there are problems such as the pedicle screw piercing the pedicle and vertebral body, damaging blood vessels, spinal cord, Complications such as nerve roots, the occurrence of these complications is related to the operation of the operator on the one hand, and to the individual differences in the anatomical structure of the pedicle on the other hand

[0004] At present, the patents on pedicle screw implantation guide devices usually have the following deficiencies: First, there are segmental restrictions and anatomical structure restrictions on the applicable spine, and most of the existing pedicle screw implantation guide devices are suitable for spinal column The thoracic or lumbar segment has the limitation that it is not suitable for the whole spine; second, only the angle between the central axis of the pedicle and the sagittal plane of the vertebral body is considered, that is, only the positioning of a single plane direction, and the screw implantation cannot be performed. Accurate positioning in the three-dimensional direction of entry; third, the angle adjustment operation convenience of the guide device is poor, the positioning is difficult, and the practicability is not strong

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