Patella locking, pressurizing and internally-fixing device

Abstract

The invention provides a patella locking, pressurizing and internally-fixing device. The patella locking, pressurizing and internally-fixing device comprises a needle, a titanium cable and a nut. The needle comprises a needle tip and a needle body. The needle body is provided with an outer thread. The nut is of a hollow structure. An inner thread is arranged in a cavity in the front end of the nut and matched with the outer thread of the needle body. The tail end of the nut is provided with a first through hole and a second through hole which are communicated in the transverse direction. The diameter of the first through hole and the diameter of the second through hole are larger than the outer diameter of the titanium cable, and the first through hole and the second through hole provide a channel for the titanium cable to penetrate through. The patella locking, pressurizing and internally-fixing device has the advantages that by means of the thread connection of the needle body and the nut and locking of the titanium cable, the phenomenon that the needle body looses or disengages during the function exercise period after the patella fracture can be effectively prevented, the stability and effectiveness of the internally-fixing device are improved, and locking pressing and healing of the fracture end are facilitated; the needle tip is fixed into the round and blunt nut in a threaded connection mode, the acute stimulation of the internally-fixing object to the quadriceps femoris is avoided, and compliance of a patient to the postoperation function exercise is improved.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a patella locking pressurized internal fixation device. Background technique [0002] Patella fracture is a common intra-articular fracture clinically. The main purpose of surgical treatment is to restore the flatness of the articular surface of the iliac bone and the continuity of the knee extensor device. At present, open reduction and internal fixation is commonly used clinically for the treatment of patella fractures, and the internal fixation structure adopted is mainly a Kirschner wire tension band fixation structure. [0003] However, the main problems of the above-mentioned internal fixation structure are: [0004] (1) During the operation, it is necessary to bend the Kirschner wire into a hook greater than 90 degrees to prevent the tension wire from falling off. On the one hand, the hook is easy to irritate the skin and muscles and cause pain; Durin...

AI Technical Summary

Problems solved by technology

[0004] (1) During the operation, it is necessary to bend the Kirschner wire into a hook greater than 90 degrees to prevent the tension wire from falling off. On the one hand, the hook is easy to irritate the skin and muscles and cause pain; During the bending process of the wire, it is easy to cause the loosening of the Kirschner wire or steel wire, resulting in fracture displacement

[0005] (2) The end of the Kirschner wire is only bent. When the knee joint function is exercised after surgery, it is easy to cause the needle body to loosen or come out, causing the tension band steel wire to fall off and making the internal fixation invalid.

[0006] (3) Compression cannot be achieved through internal fixation during fracture surgery

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