Bone cement injection device for percutaneous vertebroplasty

Abstract

The invention provides a bone cement injection device for percutaneous vertebroplasty. The bone cement injection device comprises a sleeve, a push rod and a stylet. Two parallel passages, namely, an injection passage and a decompression passage are arranged inside the sleeve longitudinally. The injection passage and the decompression passage are provided with independent open-type openings on the upper end face of the sleeve respectively. The injection passage and the decompression passage are communicated with each other at the lower end of the sleeve and penetrate to a port at the bottom end of the sleeve. The stylet loaded with bone cement is guided into the injection passage and connected to the front end of the port at the bottom end of the sleeve. The push rod is disposed in the injection passage. By the decompression device, overhigh pressure in centrum is avoided when bone cement is injected into the centrum by the device, and accordingly various operative complications are avoided.

Description

technical field [0001] The invention relates to a percutaneous vertebroplasty device, in particular to a bone cement injection device used in percutaneous vertebroplasty. Background technique [0002] At present, the bone cement injection devices used in orthopedic percutaneous vertebroplasty all have a single-sleeve structure, and the bone cement is directly injected into the interior of the vertebral body through a single channel. Due to the characteristics of the bone cement, it is necessary to prevent the bone cement from Hardening needs to be maintained at a certain speed. As a result, the internal pressure of the vertebral body will inevitably increase when the bone cement is injected (the interior of the complete vertebral body with the cortex and endplate is a closed space), and the possible adverse consequences and existing problems The disadvantages are as follows: 1. The high pressure in the vertebral body may cause pain and discomfort at the puncture site during ...

AI Technical Summary

Problems solved by technology

[0004] Through the above public documents, it is known that this technology does not solve the problem fundamentally, but only improves the smoothness of injection through the modified device, so in essence, it still does not solve the problem that the internal pressure of the vertebral body will inevitably increase when the bone cement is injected. Adverse consequences and deficiencies

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