Memory alloy wire double beam breastbone fixator containing two pairs of surrounding arms

Abstract

The invention relates to a memory alloy wire double beam breastbone fixator containing two pairs of surrounding arms. A double beam formed by aligning two ends of one memory alloy wire single beam and folding is used for making two opening cyclic structures and an arch back connecting the top ends of the two opening cyclic structures. According to the invention, one memory alloy wire is adopted for making two pairs of surrounding arms and four pressurization rings, and the surrounding arms and the pressurization rings are connected in horizontal and longitudinal spaces and are molded into a whole, so that the breastbone fixator provided by the invention is applicable to a patient with a larger wound; each surrounding arm is formed by bending a memory alloy wire double beam, so that fixation is firm; and a continuous self-pressurization annular 'cohesive force' formed after rewarming is stronger, so that a fracture end is difficult to rotate and shift. The memory alloy wire double beam breastbone fixator provided by the invention can pressurize continuously, is difficult to fall off and is safe and reliable, only cold compress needs to be carried out during disassembly after the patient is healed, the breastbone fixator can be easily taken out without an auxiliary tool, the operation is simple and quick, an operation period is greatly shortened, and the problems that safety is poor and a sheet forming product can be broken easily, has cracks and is complicated to disassemble are thoroughly solved.

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 two pairs 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 o...

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 has greatly improved the fixation strength and connection stability, because the plate is made by forging, rolling, and wire cutting, there may be internal Inhomogeneous tissue, defects in strength, plasticity, hardness, etc. This type of bone plate may have a risk of fracture after installation. Not only is there hidden danger when installed in the patient's body, but also time-consuming and labor-intensive to disassemble, and many tools are required for disassembly, especially cold compress during disassembly. After the bone plate, you need to use special pliers and a crowbar to pry open the jaws one by one. The disassembly process is cumbersome, time-consuming, and risky. Generally, medical personnel need to have certain operating experience to successfully disassemble the bone plate. In some critical cases, chest surgery is required. In an emergency situation, a little careless operation will bring harm to the patient, and in serious cases will directly endanger the life of the patient.

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