A spinal fixation and orthopedic device that can automatically expand and contract in vivo

Abstract

The invention mainly relates to a spine fixing and correcting device capable of extending and retracting automatically in the human body. The spine fixing and correcting device is composed of a growth rod implanted into the human body and a controller arranged outside the human body. The growth rod comprises a fixed rod, a growth segment and an extension rod, wherein the fixed rod, the growth segment and the extension rod are sequentially connected in the same axial direction. The growth rod is a circular tube provided with threads on the inner wall. One end of the extension rod is inserted into the growth segment, the other end of the extension rod extends out of the growth segment, and the end, inserted into the growth segment, of the extension rod is connected with a driving device. The driving device is provided with a rotatable magnet I and a rotating component which is matched with the growth segment through driving threads, and the magnet I is in transmission connection with the extension rod through a speed reducer and a connecting shaft. The controller is provided with a magnet II and a magnet III, the magnet II and the magnet III are driven by a motor to rotate, and then the magnet I is controlled by magnetic force to rotate. According to the spine fixing and correcting device capable of extending and retracting automatically in the human body, the growth rod extends gradually along with growth of the spine through magnetic force of the magnets, repeated operations are effectively avoided, wounds to a patient are reduced, and financial burden is also reduced for the patient.

Description

technical field [0001] The invention belongs to the field of medical equipment, and mainly relates to a spinal fixation and orthopedic device capable of automatically expanding and contracting in the body. Background technique [0002] During the growth and development of the human spine, deformities such as scoliosis, lordosis, and kyphosis may occur due to congenital or acquired factors. Spinal deformity can cause unsightly appearance, reduce labor capacity, reduce the volume of chest cavity, abdominal cavity and pelvic cavity, affect the function of corresponding organs such as heart and lung, affect life expectancy, and cause spinal pain and limb pain. Therefore, how to effectively correct spinal deformities has always been a problem that medical workers are committed to solving. At present, the surgical correction plan adopted for spinal correction is generally: after the growth and development of the spine is stopped, internal fixation systems such as screw rods are s...

AI Technical Summary

Problems solved by technology

At present, the surgical correction plan adopted for spinal correction is generally: after the growth and development of the spine is stopped, internal fixation systems such as screw rods are surgically implanted into the body, and the spine is corrected and fixed and fused at one time. Orthopedic fixation and fusion, so this operation cannot completely correct the deformity for patients with severe deformities due to the risk and difficulty of the operation. Since the length of the fixation rod is fixed, this type of operation is only suitable for those whose spine growth and development have stopped or basically stopped. However, most patients with spinal deformities need to be treated before the peak of growth and development, that is, the deformity has not yet developed to a more serious stage. If this surgical method is applied to patients who are growing and developing, it will not only limit the spine Growth and development, and prone to adverse reactions such as crankshaft deformity, so it is necessary to invent a new surgical plan or a new fixation device to solve the disadvantages of the appeal. In recent years, a variety of non-fusion surgical techniques have emerged, and the posterior approach is commonly used clinically. Growth rod technology, growth rod technology can control and correct deformities, ensure the growth and development of the spine and organs, this technology is based on different technical methods of growth retention. Two classifications of "manual distraction type and automatic sliding type" were proposed. The manual distraction type needs to be completed through multiple operations in stages, and there are problems including internal fixation failure, especially decoupling and broken rods, wound infection, skin damage, spontaneous Complications such as sexual fusion

The automatic sliding type successfully avoids the shortcomings of the manual expansion type, such as multiple operations, but the reliability of its fixation and its orthopedic function and effect are greatly reduced.

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