Adjustable growth valve for spine

Abstract

The invention relates to an adjustable growth valve for a spine, and belongs to the technical field of medical devices. The adjustable growth valve comprises a valve body, a fixed orthopedic bar, a movable orthopedic bar, a transmission shaft, a transmission gear and locking nails, wherein the valve body is arranged between the fixed orthopedic bar and the movable orthopedic bar; the transmission gear is arranged on the transmission shaft; a chamber I which is used for containing the transmission shaft and a chamber II which is used for containing the transmission gear are formed in the valve body, and the top end of the chamber I penetrates through the upper end surface of the valve body; a threaded hole I and a through hole are formed in the valve body, one end of the fixed orthopedic bar is connected with the threaded hole I, the hole wall of the through hole is communicated with the chamber II, one end of the movable orthopedic bar is arranged in the through hole in a penetrating way, the outer wall of the end, which is arranged in the through hole in the penetrating way, of the movable orthopedic bar is provided with sawteeth, and the sawteeth are meshed with the transmission gear; a threaded hole II is formed in the upper end surface of the valve body, the bottom part of the threaded hole II is communicated with the through hole, the locking nails are arranged in the threaded hole II, and the bottom parts of the locking nails and the sawteeth on the movable orthopedic bar are arranged in a clamping way. According to the adjustable growth valve for the spine, disclosed by the invention, the stretching adjustability is good, the stress during a stretching process is uniform, and the transmission is stable.

Description

technical field [0001] The invention relates to a spine adjustable growth valve, which belongs to the technical field of medical devices. Background technique [0002] The original concept of the growth rod technology was to design a support system and place it next to the spine, which can not only correct scoliosis and maintain the correction effect, but also continuously expand and extend according to the growth and development needs of the child. For this purpose, the system consists of upper and lower immobilization devices, an intermediate extension device and orthopedic rods in the extension device. [0003] The fixation device can choose laminar hook, pedicle hook and pedicle screw. However, pedicle screws have the strongest fixation strength and should be the first choice. [0004] The extension device is the valve body: the single-rod extension method is adopted. The lower orthopedic rod is connected to the valve body through threads. When the upper orthopedic rod...

AI Technical Summary

Problems solved by technology

However, the extension device of the existing structure has the problems of poor extension adjustability, uneven stress during the extension process, and unstable transmission.

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