Internal spreader for knee joints

Abstract

The invention belongs to the technical field of medical instruments and particularly relates to an internal spreader for knee joints. The internal spreader comprises an upper arc-shaped spreading body matched with the fossa intercondyloidea of the knee joints and a lower arc-shaped spreading body matched with the intercondylar eminence of the knee joints, wherein the middles of the upper arc-shaped spreading body and the middle of the lower arc-shaped spreading body are in cross connection. When the internal spreader for the knee joints is placed between the fossa intercondyloidea and the intercondylar eminence of the knee joints and the knee joints are in the straightened state, rear-end clearances at the fossa intercondyloidea and the intercondylar eminence of the knee joints are spread. The internal spreader has the following advantages: spreading of the knee joints are carried out in the knee joint straightening process by virtue of size changes of the clearances in the knee joint flexion and extension process, and the rear inside clearances are opened to increase the exposing range of the meniscus, so that convenience is brought for related persons to perform arthroscopy observation and instrument operation on the posterior horn of the meniscus medialis.

Description

technical field [0001] The invention belongs to the technical field of medical devices, in particular to a knee joint internal spreader. Background technique [0002] At present, during knee arthroscopy and treatment, the joint space is mainly opened through the valgus stress of the knee joint, but the posteromedial angle of the medial meniscus is already close to the joint midline. Even if the medial space is large enough, the posteromedial angle cannot be well exposed, such as Excessive valgus may cause damage to the medial collateral ligament. In addition, due to the special anatomical position of the posterior horn of the medial meniscus, it is difficult for relevant personnel to perform arthroscopic observation and instrument operation. The method of meniscus repair and suture led to the abandonment of treatment by relevant personnel, forming "technical neglect", and finally made the healing of the medial meniscus repaired worse than that of the lateral meniscus. [00...

AI Technical Summary

Problems solved by technology

[0004] Although the above solution solves the shortcomings of the existing technology to a certain extent, it cannot increase the exposure range of the meniscus, and cannot reduce the damage of the cartilage and meniscus. It is still difficult for relevant personnel to perform arthroscopic observation and instrument operation on the posterior corner of the medial meniscus.

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