Bridging anatomic locking bone plate for posterior lateral fixation of humeral shaft comminuted fracture

Abstract

The invention provides a bridging anatomic locking bone plate for posterior lateral fixation of humeral shaft comminuted fracture. The inner surface of the bone plate body is attached to the posteriorsurfaces of a humeral shaft and humeral lateral epicondyle, and the anatomical structure is matched with humerus; the bone plate body comprises a tapered periosteum stripping area, a first fixing area, a radial nerve decompression area and a second fixing area from the proximal end to the distal end in sequence, wherein the longitudinal section of the tapered periosteum stripping area is a right-angled triangle, and one right-angled side of the right-angled triangle is attached to the surface of the humeral shaft; the first fixing area is provided with a plurality of locking screw holes vertical to the surface of the attached humeral shaft and locking and pressurizing combination screw holes; the outer surface of the radial nerve decompression area is provided with a groove, and the edgeof the groove is an arc-shaped transition area; and the shape of the second fixing area is matched with the anatomical structure of the distal humerus lateral epicondyle, and the length direction of the second fixing area is provided with a plurality of locking screw holes. The bridging anatomic locking bone plate realizes the process of fixing the humeral shaft comminuted fracture without destroying the blood supply at the fracture end and without damaging nerves, and has short operation time.

Description

technical field [0001] The invention belongs to the field of medical equipment used in orthopedic surgery, in particular to a bridging anatomical locking bone plate for posterolaterally fixing comminuted humeral shaft fractures. Background technique [0002] For comminuted fractures of the humeral shaft, especially those where the fracture line extends to 1 / 3 of the distal end of the humerus, there is little space for the bone plate to hold the distal end of the fracture, making fixation very difficult. There is a bony radial nerve groove behind the middle part of the humeral shaft, through which the radial nerve passes, and the distal end of the humerus becomes flattened and widened, triangular in shape and angled forward. There is an olecranon fossa in the rear of the distal humerus, a coronal fossa in the front, and an ulnar nerve groove in the medial side, through which the ulnar nerve passes. Although there are minimally invasive bone plate techniques ( MIPO) in the tr...

AI Technical Summary

Problems solved by technology

[0003] The existing bone plate used for the fixation of humeral shaft comminuted fracture mainly has the following two problems: 1. Extensive soft tissue needs to be peeled off, and the destruction of periosteal blood supply around the fracture often leads to a high rate of fracture nonunion; 2. After internal fixation, the radial nerve is located on the surface of the bone plate, causing the radial nerve to be rubbed and squeezed for a long time, which may easily cause radial nerve damage in the long run. Inability to dorsiflexion, forearm supination disorder, and decreased or disappeared skin sensation on the radial side of the arm, etc. In severe cases, the quality of life of the patient will be significantly reduced

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