Respiratory tract stent capable of being taken out

Abstract

The invention discloses a respiratory tract stent capable of being taken out, and relates to the technical field of medical instruments. The stent comprises a supporting net, a supporting skeleton is arranged in the supporting net, the supporting skeleton comprises a plurality of telescopic supporting parts which are coaxially and vertically arranged, the plurality of telescopic supporting parts are fixedly connected through a plurality of connecting rods, and the plurality of telescopic supporting parts are used for supporting different positions of the supporting net; and the telescopic supporting parts comprise holders, the bottoms of the holders are rotationally connected with turbines, and the turbines mesh with a plurality of worms evenly distributed on the peripheral sides. The stent is reasonable in structure, in the operative treatment of benign airway stenosis and airway-esophageal fistula plugging and the post-period rehabilitation process, sliding displacement of the respiratory tract stent is avoided, granulation hyperplasia is relieved, the respiratory tract stent is convenient to take out, the pain of a patient in the later taking-out operation is greatly reduced, and secondary injury caused by the operation is avoided.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a removable airway stent. Background technique [0002] Tracheal and bronchial stenosis caused by inflammatory granuloma, scar, tuberculosis, trauma, tracheomalacia, amyloidosis, tumor and other lesions can cause obstructive pneumonia, atelectasis and dyspnea. Patients have dyspnea, stridor, Severe symptoms such as choking and coughing may cause respiratory failure and be life-threatening. In the treatment of esophageal stenosis, tracheal stenosis, biliary stenosis, vascular stenosis and other human cavity stenosis, metal stents are usually used, especially nickel-titanium memory alloy stents. These medical stents have achieved good clinical effects and have been obtained in the past decade. more and more widely applied. [0003] The Chinese patent with the publication number CN112402078A discloses a displacement-resistant airway support, which includes a first port, a ...

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Problems solved by technology

[0004] But the above-mentioned stent has the following disadvantages: due to the stimulation of the wire and the peristalsis of the lumen, the granulation hyperplasia is caused, and the granulation of the hyperplasia is embedded at both ends of the stent. It needs to be taken out after being placed for a period of time, and the granulation embedded at both ends of the stent makes it impossible to take out the stent; although there are still some technical means in the prior art that can shrink and recycle the support structure by manipulating the silk thread, however, this technology The means are inconvenient to operate and the structure is unstable

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