3D (three-dimensional) printing degradable trachea outer stent for treating tracheostenosis and manufacturing method thereof

Abstract

The invention discloses a 3D (three-dimensional) printing degradable trachea outer stent for treating tracheostenosis and a manufacturing method thereof. The 3D printing degradable trachea outer stent comprises an outer stent main body and a bellmouth formed in the end part of the outer stent main body, wherein the inside of the outer stent main body is a passage used for bronchus narrow position passing; a notch for connecting a passage is formed in the side wall of the outer stent main body in the axial direction; a plurality of annular bulges are formed in the outer stent main body in the peripheral direction; a suture needle hole penetrating through the passage is formed between the adjacent annular bulges; the trachea outer stent is prepared from degradable materials through 3D printing. The trachea outer stent can be used for expanding the narrow trachea; the re-compression of the peripheral tissues can be prevented; in addition, the stent naturally degrades along with the time; the injury of secondary operation is avoided; the novel thought and the effective treatment measure can be provided for tracheobronchial stenosis caused by various reasons.

Description

[0001] 【Technical field】 [0002] The invention relates to an extratracheal stent, in particular to a 3D printed degradable extratracheal stent for treating tracheal stenosis and a manufacturing method thereof. [0003] 【Background technique】 [0004] Adult / children with tracheobronchial stenosis of any cause are usually treated with tracheoplasty. Tracheoplasty includes end-to-end anastomosis of stenotic segment resection and sliding anastomosis, etc. Postoperative care is difficult and the incidence of complications is high, including tracheomalacia, anastomotic stoma dehiscence, and excessive proliferation of scar tissue at the anastomosis site and narrowing again. The postoperative effect of this kind of tracheoplasty is not ideal. It has been pointed out in the literature that in the case of complex congenital heart disease complicated with tracheobronchial stenosis, compared with simply solving the heart malformation, the postoperative effect of tracheoplasty on the same ...

AI Technical Summary

Problems solved by technology

However, there are also many problems after endotracheal stenting. Mass-produced endotracheal stents cannot accurately meet the individual needs of stenotic trachea; children with narrow tracheobronchi continue to develop with growth, and the existing stents cannot be well guaranteed. Therapeutic effect; especially in the case of combined cardiovascular disease, in the case of surgical removal of abnormal structures, the pressure of edema tissue around the trachea must be faced after surgery. At this time, the therapeutic effect of internal stents is obviously limited.

[0006] 3D printing (3DP) is a kind of rapid prototyping technology. It is a technology based on digital model files and using bondable materials such as powdered metal or plastic to construct objects by layer-by-layer printing. It is fully Customized features have been increasingly used in various medical fields in recent years, but due to factors such as material properties, manufacturing processes, and clinical techniques, there are still many restrictions on its use

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