Bone filling bag with nonuniform aperture

Abstract

The invention provides a bone filling bag with a nonuniform aperture. The bone filling bag comprises an implantation member, wherein the implantation member comprises a filling opening and an accommodation portion, the accommodation portion is composed of one or a plurality of flexible non-airtight enclosing walls with a plurality of through holes, and the implantation member is reduced and imbedded into a bone tissue; and a slurry-form medical material which is injected into and fills the accommodation portion via the filling opening, is solidified after the enclosing walls pushing the accommodation portion is expanded, and is fixedly connected with the bone tissue, wherein after the accommodation portion is expanded, the front-end area and the rear-end area of the accommodation portion are uniformly provided with a plurality of first through holes, an intermediate area disposed between the front-end area and the rear-end area is provided with a plurality of second through holes and third through holes, the second through holes and the third through holes are alternatively distributed at intervals, and the apertures of the second through holes are larger than the apertures of the third through holes. According to the invention, while it is ensured that the problem of seepage during bone cement perfusion is firstly solved, through setting the size and the arrangement mode of the through holes in the enclosing walls of the implantation member, the risks of secondary fractures after an operation are greatly reduced.

Description

technical field [0001] The invention relates to the technical field of bone filling device design, in particular to a bone filling bag with non-uniform aperture. Background technique [0002] Currently, the best methods for dealing with vertebral compression fractures are percutaneous vertebroplasty and percutaneous kyphoplasty, among which percutaneous vertebroplasty is used more and more widely. Since the first case of percutaneous vertebroplasty began in 1984, improvements in vertebroplasty have continued, and for a long time percutaneous vertebroplasty has generally been based on the establishment of a channel and input of bone cement (such as polystyrene). Methyl methacrylate (PMMA) enters the vertebral body to provide sufficient support between the trabecular bones in the vertebral body, so as to ensure that no compression fractures and pain will occur in the diseased vertebrae. However, this type of operation still has the uncontrollable leakage of bone cement, which...

AI Technical Summary

Problems solved by technology

After the bone cement passes through the aperture, it will not be able to control the direction of the bone cement. In a word, this patent cannot achieve directional and targeted injection of bone cement

[0007] Finally, the clinical response of the above-mentioned patented products in the market has been poor, because the chief surgeon not only has to worry about how to control the diffusion of bone cement in the case of different cortical bone fractures; The mesh is too large, the pore size is too small, how to form the burr-like bone cement embedded in the trabecular cancellous bone when the pressure is insufficient

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