Balloon restoration instrument for orthopaedics

Abstract

The invention relates to an orthopaedic instrument for assisting balloon restoration in percutaneous balloon kyphoplasty. The instrument comprises a restoration baffle and a hollow cylindrical bushing which are independent of each other and can be matched with each other for use, wherein the restoration baffle is provided with a strip-shaped baffle and a transverse handle; the strip-shaped baffle can be inserted into the bushing; the transverse handle realizes radial position with the bushing and is a strip-shaped transverse handle which is perpendicular to the strip-shaped baffle; the tail part of the bushing is provided with a radial groove in which the transverse handle of the restoration baffle is embedded; the section of the transverse handle of the restoration baffle is matched with the shape of the radial groove of the bushing; the length of the restoration baffle is greater than that of the bushing, and the cross section is semicircular; and the cambered surface of the restoration baffle is matched with the inner surface of the bushing and the plane of the restoration baffle is used for guiding extension of a balloon catheter. The instrument is applied to treating spinal vertebral compression fracture, improves the restoration rate of balloon expansion restoration operation in the process of restoring the vertebral by using balloon expansion, effectively corrects kyphosis, reduces the cavity caused by vertebral body and improves the vertebral kyphosis correcting rate of a balloon.

Description

technical field [0001] The invention relates to an orthopedic medical instrument, in particular to an instrument for assisting balloon reset in percutaneous balloon expansion kyphoplasty. Background technique [0002] Spinal fracture is a common trauma in orthopedics, and its incidence rate accounts for 5%-6% of fractures. Among spinal fractures, vertebral body compression fractures are the most common. The vertebral body is cylindrical, surrounded by cortical bone, with circular endplates above and below, and cancellous bone inside. Vertebral compression fractures can be divided into wedge-shaped compression fractures and vertical compression fractures. When the vertebral body is compressed to the front, the vertebral body becomes wedge-shaped, and the vertical compression fracture is when the vertebral body is subjected to vertical compression force until the entire vertebral body is compressed and crushed, and the height of the vertebral body is reduced. In the process o...

AI Technical Summary

Problems solved by technology

Before the balloon is inflated, it is in the shape of a catheter. The diameter of the catheter is about 2 mm. The catheter is hollow. The front end of the catheter is 1.5 cm to 2.0 cm filled with liquid under the action of hydraulic pressure and expanded into a balloon. After the balloon is filled with liquid, the pressure is high and the surface is hard. To achieve the effect of restoring the compressed vertebral body, but due to osteoporosis in the vertebral body, during the balloon expansion process, the balloon surface expands evenly to the surroundings, squeezing the surrounding loose cancellous bone trabeculae, resulting in Compression fracture of cancellous bone, a cavity is formed in the vertebral body, most of the force during balloon expansion is absorbed by the compressed and deformed bone trabecula, and cannot be effectively transmitted to the vertebral body endplate that needs to be reset, especially in the When treating patients with vertebral compression fractures with stable trabecular bone insertion, the balloon expansion force is not transmitted to the direction of the compressed endplate that needs to be reset, but to the direction of the loose bone trabecular bone without insertion , the balloon subsides, resulting in a large cavity in the vertebral body and poor endplate reset. Some operators see that the endplate reset is not satisfactory after balloon expansion, and the kyphosis of the vertebral body has not been corrected, that is, to further expand the balloon. When the balloon reaches a certain volume, it will burst, the pressure will suddenly disappear, and the liquid in the balloon will enter the human body, resulting in more side effects

The main reason is that the expansion process of the balloon is not controlled, it is allowed to expand in the loose cancellous bone, the loose cancellous bone is not shielded, the fulcrum for balloon expansion is not provided, and measures are not taken to control the balloon. The direction of balloon expansion, resulting in weakened absorption of the force of balloon expansion, and the expansion force is not directed to the direction of the endplate to be reset

Due to the existence of the above problems, the reduction rate in the balloon dilation reduction operation in the prior art is not high, and the balloon reduction operation has not achieved its ideal effect

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