A tracheal stent

Abstract

The invention discloses a tracheal stent comprising a stent body and implant devices. The stent body is of a radially-openable columnar structure, and the side wall of the stent body is provided with an axially through gap portion. During implantation, the implant device are mounted on the stent body, the sent body is put into the affected part and then is opened after reaching the specific position, and then the implant devices retreat. Since the side wall of the stent body is provided with the axially through gap portion in a shape similar to that of the tracheal cartilage position, after the stent body is opened, the gap portion is enabled to be opposite to the opening of the cartilage so as to prevent the stent body from adhesion to connective tissue at the opening of the cartilage, and the stent body and the trachea are always independent so as to facilitate taking out and replacement of the stent body; meanwhile, the gap portion of the stent body is matched with the cartilage structure, and thereby specificity of the tracheal stent is improved.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a trachea stent. Background technique [0002] The trachea is the tube connecting the larynx and the lungs, and is composed of cartilage, muscle, connective tissue and mucous membrane; among them, the cartilage is a "C"-shaped cartilage ring with the gap backward, and the cartilage rings are connected by ligaments. Connected by smooth muscle and dense connective tissue, it maintains a continuous open state. [0003] Congenital dysplasia or acquired lesions may lead to narrowing of the trachea, resulting in poor breathing and even life-threatening. In recent years, the clinical use of built-in tracheal stents in the treatment of tracheal stenosis has achieved remarkable results. like figure 1 As shown, the existing tracheal stent includes a stent body and an inserter, wherein the stent body is mostly a cylindrical structure with a closed circular cross section; the ...

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Problems solved by technology

[0004] However, since the cartilage ring of the trachea is a non-closed structure with a gap, when the stent body with a circular cross section is stretched at the cartilage ring, the outer wall of the stent body not only fits the cartilage ring, but also adheres to the smooth muscle at the gap. It fits the connective tissue; during the recovery process of the patient, the stent body will be wrapped by the growing smooth muscle and connective in the gap, which is not conducive to the replacement and removal of the tracheal stent; especially when the patient is an infant, with the cartilage ring Most of the symptoms of tracheal stenosis will be cured due to the growth and development of children, and the tracheal stent generally needs to be taken out, but because the stent body has been wrapped by connective tissue, it is difficult to take it out; at the same time, the diameter of the stent body cannot increase with the development of the trachea, resulting in The width supported by the body cannot meet the demand

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