Positioning guider for embedding pedicle screw of lower cervical spine

Abstract

The invention discloses a positioning guider for embedding a pedicle screw of a lower cervical spine. The positioning guider comprises a fixed positioning pin (1) and a sliding chute (2) which is hinged with the arm of the fixed positioning pin (1), wherein the sliding chute (2) is cambered; angular measurement scale marks (3) are uniformly formed on the inner side face of the sliding chute (2); a bushing hole (4) which penetrates through the side face of the sliding chute (2) is formed in the sliding chute (2); the central line of the bushing hole (4) directs at the center of circle of the sliding chute (2); and the distance O'O from the tip of the fixed positioning pin (1) to the center of circle of the sliding chute (2) is 1.0 to 3.5mm. The guider determines the direction and the position of the pedicle screw through the fixed positioning pin and the bushing hole on the sliding chute, has a simple structure and is convenient to operate, improves the accuracy and the safety for embedding the pedicle screw of the lower cervical spine in the posterior surgery, reduces the occurrence of related complicating diseases and is suitable to be popularized and applied in most of primary health organizations.

Description

technical field [0001] The present invention relates to a surgical instrument, in particular to a surgical instrument that can guide the operator to place the lower cervical pedicle screw accurately in the posterior way, avoiding the mistake of entering the spinal canal and damaging the vertebral artery. The lower cervical pedicle screw positioning guide is used in the field of minimally invasive cervical surgery. 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. It has been reported in the literature that the application of pedicle screw technology in cervical spine surgery has reliable biomechanical advantages and a high rate of bone fusion. Anthropometry studies have shown that cervical pedicles have smaller anatomic...

AI Technical Summary

Problems solved by technology

There are considerable risks in the traditional manual nail placement method, which are closely related to the operator's familiarity with anatomical structures, surgical experience, and operating skills

However, the existing screw guides are usually large in size, heavy in weight, narrow in application range, and high in cost; Unable to equip this equipment or patients cannot afford its high cost

Therefore, due to safety and surgical cost considerations, posterior cervical pedicle screw-related surgery has long been limited to spine surgery in tertiary hospitals.

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