Intramedullary fixation guider

Abstract

The invention relates to the field of medicine, and discloses an intramedullary fixation guider. In the invention, data at both a nail insertion point A and a nail withdrawal point B can be acquired according to the measurement result of preoperative three-dimensional reconstruction CT (Computed Tomography), wherein the nail insertion point A can be directly located according to the mark on the body surface due to the shallow and easily-exposed position of the nail insertion point A. Then, the nail withdrawal point B is located by using the locator according to the CT measurement data, and a guide bar is utilized to connect the nail insertion point A and the nail withdrawal point B. The three-dimensional CT scanned data is used, and the nail withdrawal point is determined by the locator so as to determine the nail withdrawal direction of the guider, thereby accurately controlling the injection and withdrawal routes of the nail. Since the injection and withdrawal routes of the nail are ensured by a precision instrument instead of the experience of the operator, the intramedullary fixation guider can maximally prevent the nail in the penetration process from mistakenly entering the hip joint or mistakenly penetrating the cortex of bone to damage important anatomical structures, such as nerves, blood vessels and the like.

Description

technical field [0001] The invention relates to the medical field, in particular to the intramedullary fixation technology in the medical field. Background technique [0002] Today, the incidence of pelvic and acetabular fractures is increasing year by year, accounting for 1% to 3% of the total number of fractures, and the disability rate is about 50% to 60%. At present, the internal fixation method of the anterior ring is the fixation of steel plate or intramedullary screw. The treatment of plate surgery has the advantages of excellent reduction and reliable internal fixation, but this method has large incisions, wide exposure, and more bleeding. For pure pubic ramus fractures, the biomechanical stability of retrograde intramedullary screws is better than that of plates. However, due to the unique anatomical structure of the pubic rami-acetabular anterior column, there are important blood vessels and nerves passing through the surroundings, and the nail entry path is narr...

AI Technical Summary

Problems solved by technology

[0003] The inventors of the present invention have found that in the existing suprapubic ramus-anterior acetabular column area surgery, the medical staff performing the surgery can implant the screw through fully exposed direct vision operation combined with X-ray perspective, However, the anterior column of the acetabulum is located in a deep anatomical part, and there are important tissues such as the iliopsoas muscle, femoral artery, vein, femoral nerve, and Coronamortis blood vessels on the superficial surface, making it difficult to perform fracture reduction and internal fixation placement under direct vision. The safe implantation needs to rely heavily on the experience of the operator, and it is impossible to ensure that the path of the nail in and out can be accurately controlled, and the surgical risk is relatively high.

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