Metal airway stent with membrane covering near end

Abstract

The invention relates to a metal airway stent with a membrane covering near end. The metal airway stent is characterized by comprising a framework of a tubular structure, and a membrane structure covers one end of the framework. The framework supported by a metal wire is adopted for an airway, and the membrane structure covers one end of the framework, so that a portion, uncovered with a membrane structure, of the airway stent has the advantages that a metal stent has, that is to say the airway stent is less prone to movement and conducive to discharging of airway secretion; the portion, covered with the membrane structure, of the airway stent enables the airway stent to be easy to take out, so that the airway stent can basically meet all requirements of an ideal airway stent and has good medical using value and application prospect.

Description

technical field [0001] The invention relates to a metal airway stent covered with a film at the proximal end, which belongs to the field of medical instruments. Background technique [0002] Benign tracheal stenosis is a common disease that threatens the lives of patients. At present, there is no ideal treatment method. Placement of stents in patients' trachea is an important method to save patients' lives. The definition of an ideal airway stent in foreign countries is as follows: ①easy to place; ②does not cause secretion retention; ③does not cause coughing; ④thin wall and large inner diameter of the stent; There are three types of airway stents in common use: [0003] The first type is a metal stent, which meets the requirements of ①②③④⑤⑦ mentioned above, but the very critical item ⑥ cannot be satisfied, and it cannot be taken out if it is placed for a long time. This is unacceptable for patients with benign tracheal stenosis. A metal stent is placed in a patient with st...

AI Technical Summary

Problems solved by technology

[0003] The first type is a metal stent, which meets the requirements of ①②③④⑤⑦ mentioned above, but the very critical item ⑥ cannot be satisfied, and it cannot be taken out if it is placed for a long time. This is unacceptable for patients with benign tracheal stenosis. Placement of metal stents in patients with stenosis

[0004] The second is the metal covered stent, which meets the requirements of ①③④⑥⑦, but ②⑤ cannot meet the requirements, especially the displacement of item ⑤ makes this stent unusable in most patients

[0005] The third type is the silicone stent, which only meets the requirements of ③ and ⑥, but the most critical item ① cannot be satisfied, that is, the silicone stent must be placed through a rigid bronchoscope under general anesthesia, making it difficult to popularize in China; ④, ⑤, and ⑦ cannot be satisfied. The silicone stent has a thick wall, a relatively small diameter, and a high displacement rate in the trachea, which often leads to treatment failure. In addition, the current price of silicone stents in China is also very expensive.

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