Depth-limiting intervertebral fusion cage pushing rod

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a depth-limiting intervertebral fusion cage pushing rod. The depth-limiting intervertebral fusion cage pushing rod comprises a main rod body, wherein a connector is arranged at the bottom end of the main rod body, a connecting block is arranged at the bottom end of the connector, a handheld part is arranged at the top of the main rod body, a striking part is arranged at the top end of the handheld part, a depth limiting device is arranged at the upper end of the connector on the main rod body in a sleeving mode, an external thread is arranged on the main rod body, the main rod body is sleeved with the depth limiting device, the depth limiting device is in threaded fit with the main rod body, the depth limiting device comprises a threaded sleeve and arc-shaped baffles arranged on the two sides of the bottom end of the threaded sleeve, a containing cavity is formed between the two arc-shaped baffles, and the connector is rotationally arranged in the containing cavity. The depth limiting device on the main rod body can play a limiting role to prevent the connector from pushing an intervertebral fusion cage to a too deep position; the depth limiting device is in threaded fit with the main rod body, and the position of the limiting sleeve on the main rod body can be adjusted according to specific conditions; and therefore, the limiting depth of the limiting sleeve can be adjusted to meet different operation requirements.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a pushing rod of a depth-limiting intervertebral space fusion device. Background technique [0002] Intervertebral space fusion refers to the operation of removing soft tissue in the diseased intervertebral disc and implanting straight bone tissue or artificial bone tissue to promote fusion between the two vertebral bodies. The intervertebral space fusion cage is implanted under minimally invasive surgery. The depth of fusion cage placement is extremely important. If it is placed shallowly, it will easily withdraw and compress the nerve root, leading to a second revision operation; if it is placed deep, it may cause the intervertebral fusion cage to enter. The front abdominal cavity, causing life-threatening to the patient. At present, it is mainly relying on the experienced surgeon to tap the push rod with a hammer under blind vision, relying on the push rod...

AI Technical Summary

Problems solved by technology

[0002] Intervertebral space fusion refers to the operation of removing soft tissue in the diseased intervertebral disc and implanting straight bone tissue or artificial bone tissue to promote fusion between the two vertebral bodies. The intervertebral space fusion cage is implanted under minimally invasive surgery. The depth of fusion cage placement is extremely important. If it is placed shallowly, it will easily withdraw and compress the nerve root, leading to a second revision operation; if it is placed deep, it may cause the intervertebral fusion cage to enter. Anterior abdominal cavity, life-threatening to the patient

At present, it is mainly relying on the experienced surgeon to tap the push rod with a hammer under blind vision, relying on the push rod to send the fusion cage into the intervertebral space, and it needs to reach a suitable depth (the distance between the posterior edge of the fusion cage and the posterior edge of the vertebral body is 3-5mm) ), but because the surgeon’s percussion force cannot be consistent each time, and it is impossible to know how much force is needed to send the fusion device to a suitable depth. or even fall into the abdominal cavity

Especially for some patient groups such as slippage or osteoporosis, it is difficult for experienced surgeons to grasp the depth, which may easily lead to too deep implantation of the fusion device or repeated adjustments, increasing the risk of patient injury

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