Nasal sinus stent

Abstract

The invention relates to the technical field of polymer stents, and in particular to a nasal sinus stent and a method for molding and using the stent. The technical problem to be solved is to overcomethe defect that pressure-gripping is easy to cause collapse in the prior art, and the aim is achieved by the following technical scheme: S1, selecting a biodegradable polymer material, and conductingdissolution to prepare a mixture; S2, extruding the mixture through an extruder, and then conducting stretching to form braided wires; S3, using the braided wires to start weaving an initial configuration stent, and forming a V-shaped weaving path; S4, fixing the V-shaped vertices of the initial configuration stent to form a basic grid structure; S5, repeating the V-shaped weaving path striding across the vertices of a fixed distance until a symmetrical grid stent is formed, connecting the end and top of the braided wires fixedly, and fixing the cross point of the grid stent; and S6, alternating the surface of the grid stent with surrounding sutures, conducting pressing and gripping through the sutures, and extracting the sutures after completing pressing and gripping.

Description

technical field [0001] The invention relates to the technical field of polymer stents, in particular to a sinus stent and its forming and using method. Background technique [0002] Stents may be used to hold, open, or expand bodily structures such as veins, arteries, ureters, urethras, hollow body organs, nasal passages, sinus cavities, and the like. There are many folds inside the nasal cavity, and the shape is changeable, and the individual differences are very large. After the disease is affected, the complexity of the internal space of the nasal cavity is further intensified. [0003] The attack rate of chronic sinus diseases such as chronic sinusitis and nasal polyps is extremely high, and surgery is one of the main treatment methods. With the development of medical technology, transnasal endoscopic nasal sinus surgery has become the mainstream. This operation is a better treatment method, but it takes a certain amount of time to recover the function of the nasal cav...

AI Technical Summary

Problems solved by technology

On the other hand, in the narrow space of the nasal cavity, any operation is difficult, and it is easy to cause nasal adhesions, resulting in related complications

And the two usually cause and effect each other, which raises the possibility of endoscopic surgery.

[0004] The existing stent crimping mainly relies on one-time forming crimping and loading tools, which can perform a unified crimping on the whole stent, but the crimping effect of the domestic crimping device is poor when used, and it is easy to cause the stent to be broken. Collapsing bombs, so the present invention provides a sinus stent and its forming method

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