sinus stent

The technology of a sinus and mesh stent is applied to the field of the sinus stent and its molding application, which can solve the problems of improved nasal endoscopic surgery, poor pressure-grip effect, nasal adhesion and the like, and achieves good shape, practicability, and good stretching and compressibility.

Active Publication Date: 2022-01-25
上海七木医疗器械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Embodiment 1

[0032] The main raw materials involved in the sinus stent of the present invention are biodegradable polymer materials, which include polylactic acid PLA, L-PLA, polyglycolic acid / polylactic acid copolymer PGLA, polycaprolactone PCL, Polyhydroxypentylbutyrate PHBV, polyacetylglutamate PAGA, polyorthoester POE, polyethylene oxide / polybutylene copolymer PEO / PBTP, polylactide-cocaprolactone copolymer PLC or polycyclohexanone PDO.

[0033] The molding and using method of sinus stent of the present invention comprises the following steps:

[0034] Step S1, selecting a biodegradable polymer material with a viscosity of 0.5-5.0dl / L and a molecular weight of 50,000-1,000,000, and then using an organic solvent to dissolve the biodegradable polymer material to form a mixture;

[0035] Step S2, extruding the mixture through an extruder, and then stretching to form a braided filament 1, the braided filament 1 is a polymer monofilament fiber carrying an active drug, and the monofilament fi...

Embodiment 2

[0042] The molding and using method of sinus stent of the present invention comprises the following steps:

[0043] Step S1, selecting a biodegradable polymer material with a viscosity of 0.5-5.0dl / L and a molecular weight of 50,000-1,000,000, and then using an organic solvent to dissolve the biodegradable polymer material to form a mixture;

[0044] Step S2, extruding the mixture through an extruder, and then stretching to form a braided filament 1, the braided filament 1 is a polymer monofilament fiber carrying an active drug, and the monofilament fiber has one or more biodegradable polymers composition;

[0045] Step S3, select a braiding machine with a longitudinal central axis, the braiding machine includes a plurality of first fixed points and a plurality of second fixed points arranged at intervals in the circumferential direction and in the axial direction, use the braided wire 1 to start weaving the initial configuration support, Form a V-shaped weaving path;

[0046]...

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Abstract

The present invention relates to the technical field of polymer stents, in particular to a sinus stent and its forming and using method, and aims to solve the technical problem of overcoming the defects of the prior art that are easy to collapse under pressure and is achieved through the following technical solutions : S1, choose biodegradable polymer material, dissolve and make mixture; S2, extrude the mixture through extruder and then stretch to form braided wire; S3, use braided wire to start weaving the initial configuration support to form a V shape S4. Fix the V-shaped vertices of the initial configuration support to form a basic grid structure; S5. Repeat the V-shaped weaving path across the vertices at fixed intervals until a symmetrical mesh support is formed. The end and the top of the mesh bracket are connected and fixed, and the intersection of the mesh bracket is fixed; S6, the surface of the mesh bracket is interspersed with sutures, and the sutures are crimped through the sutures, and the sutures are extracted after the crimping is completed.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F2/90A61L31/06A61L31/14
CPCA61F2/90A61L31/06A61L31/14
Inventor 孙鹏黄秀珍孟秀
Owner 上海七木医疗器械有限公司
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