Multi-angle locking and fixing humerus straight type interlocking intramedullary pin

Abstract

The invention discloses a multi-angle locking and fixing humerus straight type interlocking intramedullary pin. The multi-angle locking and fixing humerus straight type interlocking intramedullary pincomprises a humerus intramedullary pin main pin, wherein the humerus intramedullary pin main pin adopts a hollow structure, and comprises a near end intramedullary pin, a far end intramedullary pin and a connecting section; the diameter of the near end intramedullary pin is greater than that of the far end intramedullary pin; one end of the near end intramedullary pin is in transition connectionwith the far end intramedullary pin through the connecting section, and the inner part of the other end of the near end intramedullary pin is connected with a terminal cap; the near end intramedullarypin, the far end intramedullary pin and the connecting section adopt an integrated structure; the diameter of the near end intramedullary pin is 9mm, a plurality of pin holes are formed in the near end intramedullary pin and the far end intramedullary pin; bone screws are arranged in the pin holes; and the bone screws in the near end intramedullary pin are multi-angle screws. According to the multi-angle locking and fixing humerus straight type interlocking intramedullary pin disclosed by the invention, the opportunity of selecting appropriate humerus intramedullary pin main pin according tohumerus individual dissection differences is increased, and the operation risk of generating fracture of humeral head and injury of axillary nerve caused by that an opening in the humerus head part islarge is reduced.

Description

technical field [0001] The invention relates to the field of humerus bone screw instruments, in particular to a multi-angle locking and fixing humerus straight interlocking intramedullary nail. Background technique [0002] Compared with the normal population: in patients with short stature, the diameter of the humeral head is smaller, the total length of the humeral shaft is shorter, and the diameter of the medullary cavity is narrower. When using a normal type intramedullary nail, the diameter is too large, especially the proximal diameter, which often causes iatrogenic humeral fractures during surgery due to the large opening of the humeral head. After the research and analysis of a large number of clinical cases, the distance between the proximal locking nail and the fracture line should be at least 5 mm to securely fix the greater tuberosity fracture. In addition, according to the measurement of a large number of Chinese axillary nerves, the Chinese axillary nerve is l...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a multi-angle locking and fixing humerus straight interlocking intramedullary nail to solve the above-mentioned background technology when using a normal type intramedullary nail, the diameter is too large, especially the diameter of the proximal end, which is often caused by the humerus The large opening of the head part causes iatrogenic fractures and the inability to effectively use the medial calcaneal screw leads to the loss of reduction and failure of internal fixation and other surgical risks

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