Device for forming cavity in centrum

Abstract

A device for forming a cavity in a centrum comprises a cutting part and a control device, wherein the cutting part is used for cutting the centrum and the control device is used for controlling the cutting part to cut the centrum. The control device comprises a bearing part used for bearing the cutting part, and the end, adjacent to the cutting part, of the bearing part is provided with a bendable portion. The control device further comprises a manipulation assembly used for controlling the bearing part to bend, and the manipulation assembly is arranged to generate action force in the axial direction of the bearing part to control the bearing part to bend. The device can effectively avoid dangers caused by bilateral puncture in the prior art, the shape of the cavity is controllable, meanwhile, damage to bone tissue is reduced, and bone cement can permeate between bone trabeculae more effectively.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to a device for forming a cavity in a vertebral body. The device provided by the invention is mainly used in minimally invasive surgical operations for treating vertebral body compression fractures caused by osteoporosis and accompanying intractable pain. Background technique [0002] At present, the minimally invasive surgical methods for the treatment of vertebral compression fractures mainly include percutaneous vertebroplasty and percutaneous kyphoplasty. [0003] Among them, percutaneous vertebroplasty (PVP) refers to injecting bone cement into the vertebral body through the skin, and then through the pedicle or outside the pedicle to increase the strength and stability of the vertebral body, prevent collapse, and relieve pain. , and even partially restore the height of the vertebral body as a minimally invasive spinal surgery technique. The key steps of percutaneous verteb...

AI Technical Summary

Problems solved by technology

[0007] 1) Due to the relationship between the puncture angle, it is difficult for the surgical instruments of conventional percutaneous vertebroplasty / percutaneous kyphoplasty to pass through the midline of the vertebral body. Symmetry of body height

However, this will not only cause the patient’s injury at least twice as much as that of unilateral puncture, but also increase the labor intensity of medical staff, and the patient and medical staff will receive radiation for a long time. Of course, more surgical instruments are needed for bilateral puncture, and the medical cost is also high. will be higher

[0008] 2) When performing puncture, although percutaneous kyphoplasty is indeed more effective than percutaneous vertebroplasty in restoring the height of the vertebral body, the shape of the cavity is not controllable

[0010] 4) At the same time, the balloon objectively has the effect of compacting cancellous bone during the expansion process, resulting in the obstruction of the penetration of bone cement into the surrounding trabecular bone in the cavity formed by expansion

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