Airway stent of which supporting force is enhanced by utilizing parallelogram principle

Abstract

The invention provides an airway stent of which the supporting force is enhanced by utilizing a parallelogram principle. The stent comprises a stent body, multiple guide wires and a control limiting device; the stent body is a net-shaped framework, and mesh holes of the stent body are in a parallelogram shape. The stent body comprises a working section, and multiple net-shaped nodes in the workingsection form multiple first connecting points; the control limiting device is of a tubular structure, and multiple second connecting points are arranged on the surface of the control limiting deviceand correspond to the first connecting points; the two ends of each guide wire are fixedly connected with the corresponding first connecting point and the corresponding second connecting point respectively. According to the airway stent, the parallelogram principle is adopted, through the control limiting device, the guide wires are tensioned, so that the framework grid spacing of the working section is axially shortened, the radial supporting force of the stent is enhanced, the airway expansion meets an expected requirement, and the using effect of the stent is improved; the stent can be positioned and developed, and by tensioning the corresponding guide wires, the radial supporting force of the corresponding positions of the stent is accurately enhanced.

Description

technical field [0001] The invention relates to the technical field of medical stents, in particular to an airway stent that utilizes the parallelogram principle to enhance supporting force. Background technique [0002] Various lesions such as tracheomalacia or infiltration of malignant tissue, tracheal stenosis caused by compression, and esophageal and tracheal fistula, thoracogastric and airway fistula formed in the late stage of various tumors seriously threaten human health and significantly limit the ventilation function of patients. Even life-threatening. Stent placement can not only quickly and effectively relieve dyspnea, seal the fistula, improve the quality of life, but also win time for further treatment. [0003] At present, the airway stent is mainly based on a single braid (rhombic grid, etc.) stent. In some pathological conditions, its bending performance is not ideal, the radial support force is not enough, and the airway expansion cannot meet the expected ...

AI Technical Summary

Problems solved by technology

[0003] At present, the airway stent is mainly based on a single braid (rhombic grid, etc.) stent. In some lesions, its bending performance is not ideal, the radial support force is not enough, and the airway expansion cannot meet the expected requirements.

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