Implantation system for bone implants

Abstract

The invention relates to an implantation system for bone implants. The implantation system comprises a bag body and a conveying device. The far end of the bag body is fixedly connected with an end socket, the near end of the end socket is provided with a blind hole with an opening facing the interior of the bag body, and a micro hole is formed in the bag body. The conveying device comprises a lining core, a conveying pipe and a sleeve pipe. The conveying pipe is a rigid pipe, the far end of the conveying pipe is detachably connected with the near end of the bag body, the lining core is inserted into the conveying pipe in a sliding mode, the portion, extending out of the far end of the conveying pipe, of the far end of the lining core is a bent section, the far end of the lining core penetrates through the conveying pipe and the bag body and then is inserted into the blind hole, the far end of the sleeve pipe is a flexible section and is rigid in the radial direction, and the conveying pipe and the bag body are sleeved with the sleeve pipe. According to the implantation system for the bone implants, operation steps are simplified, the bone tissues are smoothly squeezed to be open in the conveying pipe, the bag body can be fed into the center of a centrum or the opposite of the centrum, bone cement is prevented from being leaked, and the centrum height can be recovered.

Description

technical field [0001] The invention belongs to the field of medical instruments, and in particular relates to a bone filler implantation system used in percutaneous kyphoplasty (PKP). Background technique [0002] Osteoporotic vertebral compression fractures are a common disease that endangers the health of middle-aged and elderly people. For vertebral compression fractures, traditional treatment methods are mainly conservative, including bed rest, drug pain relief, and external fixation with braces. Further loss of bone mass will aggravate osteoporosis, thereby forming a vicious circle; while open surgery is often due to the poor general condition of the patient and insufficient screw fixation strength, which easily leads to internal fixation failure. [0003] French doctor Deramond et al reported in 1987 the application of percutaneous vertebroplasty (PVP) in the treatment of invasive hemangiomas of the C2 vertebral body and achieved good results. Since then, this techni...

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Problems solved by technology

The disadvantage of this operation is that it can only fix the deformity of the injured vertebra and relieve the pain, but cannot restore the height of the vertebral body and correct the kyphosis deformity. It is difficult to control the flow of bone cement, and the leakage rate of bone cement is relatively high, which is reported in the literature as 30% to 67%.

In order to make the balloon enter the vertebral body smoothly, it is necessary to establish a working channel with a puncture needle and a working cannula, then use a bone drill to drill out the working cavity of the balloon before expansion, and finally send the balloon into the vertebral body , the operation steps are cumbersome; due to the structure of the vertebral body, in order to maintain the biomechanical force balance of the vertebral body, each vertebral body needs to be expanded with bilateral balloons, and during the balloon expansion process, the vertebral bodies often The original cracks in the body increase, and the bone cement will leak along these cracks to the surrounding bone tissue and even to the extravertebral body, causing serious complications

[0004] Spineology developed the Vessel series of bone filler bags (publication number: US20040073308). The bag with holes is sent into the vertebral body, and bone cement is injected into the bag, which can effectively control the occurrence of bone cement leakage. However, other instruments need to be used to open the cavity inside the vertebral body that can accommodate the pouch, and bilateral punctures are still required. There are many surgical steps, the probability of complications is high, the operation time is long, and the pain and pain of the patient are increased. economic burden

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