Percutaneous support-dilated bone-scraped vertebral body shaping device

Abstract

The invention discloses a percutaneous support-dilated bone-scraped vertebral body shaping device and relates to the technical field of medical appliances. The device comprises a targeting screw, a dilated support, an inner sleeve and an outer sleeve; a screw rod of the targeting screw is a hollow rod body with external threads, one target hole and a plurality of leak holes are formed in the circumferential surface of the screw rod, and a through hole communicating with a cavity of the screw rod is formed in a screw cap of the targeting screw; the dilated support is composed of a plurality ofelastic dilated reticular pipes with reticular pipe walls, both the inner sleeve and the outer sleeve are elastic pipe bodies, the outer sleeve can be inserted into the internal cavity of the screw rod of the targeting screw, the inner sleeve can be inserted into a pipe cavity of the outer sleeve, and the dilated support can be radially compressed and then inserted into a pipe cavity of the innersleeve; and the inner sleeve is provided with two symmetrical-distributed direction control lines which are used for controlling the front end of the inner sleeve to be directed to a target. The device provided by the invention is applied to vertebroplasty.

Description

technical field [0001] The invention relates to medical device technology, in particular to a technology of a percutaneous bracket expansion bone curettage vertebroplasty device. Background technique [0002] Patients with osteoporotic vertebral compression fractures can be gradually relieved after conservative treatment, but about 1 / 3 of the patients will have obvious low back pain and kyphosis. Radiologically, the vertebral bodies may show wedge-shaped or "double concave sign" changes, and some may show "vacuum sign" in the vertebral body or fractures with a fracture sign in the vertebral body. In some patients with vertebral fractures, there will be cavities in the vertebral fractures, and there is sequestrum in the cavities. This type of vertebral fractures is difficult to heal. Percutaneous vertebroplasty can increase the strength and stability of the vertebral body by injecting bone cement into the fracture site of the vertebral body. [0003] At present, percutaneou...

AI Technical Summary

Problems solved by technology

Its defect is that: after the pressure release of the air bag, the cavity supported by the air bag will collapse, and even the cavity supported by the air bag will be backfilled, so that the perfused bone cement cannot effectively support the vertebral body, resulting in postoperative vertebral body. The stability of the body is poor, which affects the surgical effect

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