Universal pedicle screw pressure injection system device

Abstract

The invention discloses a universal pedicle screw pressure injection system device and relates to medical instruments. The universal pedicle screw pressure injection system device comprises a, a screw, b, a connecting device and c, a pressure injector; in the screw, a screw head (1) is embedded into a sunken arc surface at the lower end of a U-shaped connecting piece (7); an internal hexagonal counter hole (6) is formed at the top end of the screw head (1); a through lower U-shaped slot (5) is formed at the lower end of the mid-lower part of a screw rod; an upper circular hole (3) is formed on the right side of the U-shaped slot (5); a middle elliptical hole (4) is formed at the position, a screw pitch lower than the upper circular hole (3), on the left side of the U-shaped slot (5); in the connecting device, the outer screw thread at the upper end of a connecting pipe (10) and the lower end are engaged with the inner screw thread of a pressure injector barrel bottom output pipe (11); the lower end of the connecting pipe (10) is a hexagonal pipe head inserted into the internal hexagonal counter hole (6) at the top end of the screw head (1); the outer screw thread at the lower end of a rotary handle pipe (9) is engaged with the inner screw thread of the U-shaped connecting piece (7); in the pressure injector, the outer screw thread on the upper part of an outer barrel (12) is engaged with the inner screw thread of an outer barrel cover (14); the screw thread in the barrel is engaged with the outer screw thread of a vertebra rod (13); and the barrel bottom output pipe (11) is provided with an inner screw thread. The universal pedicle screw pressure injection system device has the characteristics of high pedicle screw inner fixing stability, simple device structure, good operation operability and reduced bone cement leakage, and meets the requirement of clinicians on osteoporosis centrum inner fixing.

Description

technical field [0001] The invention relates to a medical device, in particular to a pressurized injection universal pedicle screw system device. Background technique [0002] The aging population in the world has led to more and more patients with osteoporosis, and there are more and more vertebral body lesions accompanying osteoporosis, such as: vertebral compression fractures, lumbar degeneration, spinal stenosis, and spondylolisthesis. Osteoporosis is a systemic skeletal disease, mainly manifested as decreased mineral content in bone tissue and damage to bone trabeculae, while increasing bone fragility. In spinal surgery, for patients with good bone quality, the pedicle screw internal fixation system has become the most commonly used posterior spinal internal fixation method due to its advantages of short segment fixation, three-column fixation, and easy operation. However, in the operation of patients with osteoporosis, the holding force of ordinary pedicle screws on t...

AI Technical Summary

Problems solved by technology

There are many defects in the existing internal fixation system, mainly including ① inaccurate stability of vertebral body fixation ② leakage of spinal canal of bone cement and injection system leakage ③ complex device manufacturing ④ cumbersome operation

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