Multifunctional centrum forming instrument

Abstract

The invention discloses one multifunctional centrum forming instrument. The multifunctional centrum forming instrument comprises a saccule assembly and a cavity opening assembly. The cavity opening assembly comprises an outer tube assembly and a cavity opening liner assembly. The outer tube assembly comprises an outer tube and an outer tube handle. The rigidity allowing the outer tube to bear tissue cavity opening thrust without deforming exists in the axial direction of the outer tube, and the outer tube handle is provided with a bone filler injection interface. The cavity opening liner assembly comprises a sealing head, a connecting part and a connecting part handle, and the maximum external diameter of the sealing head is larger than or equal to the internal diameter of the outer tube.The far end portion of the saccule assembly is inserted into the outer tube assembly along the connecting part. The invention further provides another multifunctional centrum forming instrument. Differently, a side hole is formed in the far end of the outer tube, the cavity opening liner assembly comprises a shell cover and the connecting part, and the maximum external diameter of the shell coveris larger than the internal diameter of the outer tube. By means of the two multifunctional centrum forming instruments, cavity opening, expanding and bone filler injecting are integrated, the operation is easy and flexible, the operation time is shortened, and the operation risk is reduced.

Description

technical field [0001] The invention belongs to the technical field of medical instruments, in particular to a multifunctional vertebroplasty instrument used in vertebroplasty. 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 technique has...

AI Technical Summary

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%.

All operations need to be performed under X-ray monitoring. The more cumbersome the operation, the longer the operation time, the greater the damage to the doctor’s health and the higher the physical requirements; bilateral balloon dilation and bone cement injection will cause greater trauma to the patient and a higher chance of complications , also increases the economic burden of the patient, and the above shortcomings become more prominent in the case of multi-segment vertebral body lesions

[0004] In view of the above shortcomings, the Chinese patent No. 201310671713.6 discloses a vertebral body balloon expansion system, which is designed with a hard head to protect the sleeve and liner of the balloon. In the working channel before expansion, the distal end of the balloon is fixedly connected with a distal closed head. First, the head of this technology is set at the distal end of the balloon, and the connection between the distal end of the balloon and the head involves the balloon. The sealing problem of balloon expansion has a certain risk of leakage during balloon expansion. Secondly, this technology only realizes the opening and expansion of the working channel before expansion, and does not realize the filling function of bone filler, and does not achieve the maximum reduction. Patient's Financial Burden

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