A breastbone fixer with a memory alloy wire double beam provided with a pair of embracing arms

Abstract

The invention provides a breastbone fixer with a memory alloy wire double beam provided with a pair of embracing arms. The breastbone fixer comprises a double beam which is formed by bending a memory alloy wire single beam with both ends aligned; the two ends of the double beam bend inward to form an embracing arm each; the two embracing arms form a split ring structure; two memory alloy wire single beams at the middle section of the double beam are expanded and extruded to form arc-shaped press rings; the two arc-shaped press rings are arranged symmetrically to form an elliptical shape. The embracing arms and the press rings are formed from one memory alloy wire and the embracing arms and the press rings are spatially connected in the transverse direction and the longitudinal direction and integral forming is achieved; the two embracing arms formed by bending the memory alloy wire double beam form a split ring structure, so that the embracing force is great; the breastbone fixer is simple in structure and is wholly smooth and corner-free; when being used for fixing a breastbone of a patient, the breastbone fixer causes less damage to vessels and nerves, is small in foreign matter feel, is capable of overcoming left-right disengagement caused by expansion force of human respiration and applying pressure continuously, is not liable to fall off, is safe and reliable and is easy to detach.

Description

technical field [0001] The invention belongs to medical equipment, and relates to a sternum fixer, in particular to a sternum fixer with memory alloy wire double beams and a pair of embracing arms. Background technique [0002] In recent years, sternal fractures have been caused by traffic accidents, falls and other reasons. Sternal fractures are relatively serious chest injuries. Fractures cause the chest wall to lose support and soften, causing abnormal breathing and mediastinal oscillations, which seriously affect the patient's respiratory and circulatory functions and are life-threatening. Fixers such as steel wire binding, Kirschner wire fixation, steel plate fixation and synthetic resin fixation are generally used in thoracic surgery at present. During thoracic surgery, due to the need for patient treatment, it is sometimes necessary to incise the sternum along the midline, and then bind the sternum with stainless steel wire or fix it with Kirschner wires after the ope...

AI Technical Summary

Problems solved by technology

The sternum is a flat bone, which is easy to shift, and it is difficult to control the binding strength of the wire due to the tension of lung respiration

If the binding is too loose, the fixing effect will not be achieved. If the binding is too tight, the steel wire will easily break, and the longitudinal steel wire will easily tear the sternum. If the steel wire is used, the steel wire is easy to loosen, resulting in adverse consequences such as poor healing of the sternum and delayed healing.

After the sternum heals, the steel wire is not easy to remove, and may even damage vital organs under the sternum, leading to medical accidents

Although the fixation with steel plates is more reliable, it requires drilling, which is easy to damage the organs behind the sternum, and the steel plates in the body are prone to electrolytic reactions, requiring a second operation to remove them

Although synthetic resin is absorbable and does not require a second operation to remove the fixation, it needs to be inserted into the bone marrow cavity during fixation, which is prone to infection and the fixation effect is not reliable

The above-mentioned existing surgical operation is more difficult when it is fixed, and the operation time is longer. More importantly, it is difficult to remove after healing.

With the development of science and technology, memory alloy plates are used to make sternal bone plates. Although this type of bone plate greatly improves the fixation strength and connection stability, it is easy to break and have cracks after installation. Not only are there hidden dangers, but also time-consuming and labor-intensive disassembly requires many tools. After the bone plate is cold-applied, it is necessary to use special pliers and a pry bar to pry open the jaws one by one. The disassembly process is cumbersome and time-consuming. There are certain risks and requires medical attention. The bone plate can be disassembled smoothly only if the personnel have a certain operating experience. In some emergency situations where critical cases need to be rescued by opening the chest, a little careless operation will bring harm to the patient, and the serious one will directly endanger the life of the patient.

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