Combined tool for percutaneous screw setting for minimally invasive pelvic fracture

Abstract

The invention discloses a combined tool for percutaneous screw setting for minimally invasive pelvic fracture and belongs to the field of medical instruments. The combined tool comprises a casing (1), a straight-head probe (5) and a bent-head probe (6), the right end of the bent-head probe (6) is a flat elbow pushing end (601), the front end of the elbow pushing end (601) bends towards the flat side, the right end of the straight-head probe (5) is a flat straight-head pushing end (501) which is straight, and the right end of the casing (1) is sharp to form a sharp end (2). The casing (1) can be positioned accurately on a smooth bone inclined plane of a pelvis by the aid of the sharp end (2), drill holes can be fine adjusted as required to select the optimum screw setting position, and when the straight-head probe (5) deviates from a preset track and is blocked by cortical bones or pierce the cortical bones carelessly, the bent-head probe (6) is used for preventing a pushing end from falling into an original screw path. The combined tool has the advantages that the success rate of operations is high, the structure is simple, the operation is convenient, and the like.

Description

technical field [0001] The utility model relates to a combination tool for percutaneous nail placement in minimally invasive pelvic fractures, which belongs to the field of medical instruments, and in particular relates to a combination tool for preparing nail tracks in postoperative operations after pelvic fractures. Background technique [0002] After a fracture occurs in the pelvis, surgical reduction and internal fixation are required. At present, minimally invasive techniques can be used for closed reduction and percutaneous hollow screw internal fixation. This technique requires first inserting a hollow nail guide wire, and then screwing in the screw along the guide wire. The pelvis has a very complex three-dimensional anatomical structure, the surrounding soft tissue is rich, the percutaneous nail insertion depth is large, and the needle insertion operation is difficult. Therefore, whether the guide wire can smoothly penetrate into the ideal position of the bone is the...

AI Technical Summary

Problems solved by technology

[0003] 1. The conventional operation is to use a power drill to directly penetrate the guide pin. The front end of the hollow nail guide pin is sharp. Once it touches the cortical bone, it is easy to penetrate. Once the guide pin deviates from the predetermined track or even breaks through the cortex, the position and angle are difficult. Adjustment, often can only declare the failure of the operation

[0004] 2. During percutaneous drilling in clinical operations, the drilling position is often poor, and fine adjustment of the position is required. It is very difficult to perform this operation in the deep part of the skin, and the drill bit is easy to fall into the original hole; the positioning is not accurate, and the success rate of the operation is low.

[0005] 3. Because the soft tissue in the pelvis is rich, especially when the sacroiliac screw is placed and the pubic branch is placed antegradely, the effect is obvious. When inserting the guide wire, the guide wire is prone to bending and slipping, and it is difficult to drill. Opening of the round bone needle, preparation of the screw path, and replacement of the thin hollow screw guide pin and placement of the screw. The operation of replacing the round bone needle requires the use of a cannula

The front end of the traditional cannula is flat, and the surface of the pelvis is very smooth, so when the nailing sleeve is fixed on the bone slope, it is very easy to slip, making it difficult to place the needle again and prolonging the operation time. Increase the frictional force in contact with the bone surface, but when the sleeve passes through the muscle tissue, the groove will cause muscle entanglement and muscle packing between the serrated teeth, which will affect the actual fixation effect and increase soft tissue damage

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