Olecranal fracture fixator

Abstract

The invention discloses an olecranal fracture fixator. The olecranal fracture fixator comprises an arc-shaped tail end nail plate, an expanding screw, and a screw cap, wherein a through hole allowing the expanding screw to pass through is formed in the tail end nail plate, external threads matched with the screw cap are arranged on the expanding screw, after the screw cap is screwed to the expanding screw, the tail end nail plate tightly pushes against the olecroanon of an applied person, the expanding screw is a hollow pipe and comprises an outer section with large outer diameter and an inner section with small diameter, a conical section is arranged between the outer section and the inner section, an American valve is arranged at the free end of the outer section, a tapered opening is arranged at the free end of the inner section, and at least one air outlet hole is formed in the side wall of the inner section; the olecranal fracture fixator further comprises a section of rubber hose, wherein one end of the rubber hose compresses and hoops the conical section through a sleeve with the inner bore taper being the same as the taper of the conical section, the other overturned end of the rubber hose is stuffed into the tapered opening, and a plunger piston with the taper being the same as that of the tapered opening is adopted for stuffing up. The olecranal fracture fixator realizes fixing through air inflation expansion of the rubber hose, the flexibility of the acting force is adjustable, and the taking out is easy and convenient.

Description

technical field [0001] The invention relates to a medical instrument, in particular to a fixer for olecranon fracture. Background technique [0002] The subcutaneous protrusion behind the proximal end of the ulna is the olecranon. It forms a semilunar notch with the coronoid process of the ulna in front. This notch just articulates with the trochlear of the humerus. The ulna-humeral joint only has flexion and extension activities, and the olecranon fracture is an intra-articular fracture involving the semilunar notch. Therefore, anatomical reduction is an effective measure to prevent joint instability and prevent osteoarthritis and other complications. Fractures of the olecranon are more common and occur mostly in adults. [0003] The invention patent with the publication number CN103610490B discloses a pressurized intramedullary locking nail, including: a main intramedullary nail, the main rod of the main intramedullary nail has a hollow hole, and the proximal end of th...

AI Technical Summary

Problems solved by technology

However, this technical solution does not introduce how to take out the intramedullary nail. During the process of screwing in, the petal-shaped wings are deformed and contact the bone tissue to fix the internal expansion screw. However, during the process of tak...

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