Silicone stent, implantation system, and manufacturing method

A silicone stent for trachea, comprising a stent body, wherein the stent body comprises a braided mesh frame and a silicone body molded on the braided mesh frame;

• a circumferentially sealed space is defined within the silicone body;
• a distal end and a proximal end of the silicone body respectively have a distal-end opening and a proximal-end opening that communicate with the space;
• wherein an inner diameter of the circumferentially sealed space, an inner diameter of the distal-end opening, and an inner diameter of the proximal-end opening are substantially the same;
• wherein the silicone body is molded on the braided mesh frame by film coating;
• and the braided mesh frame extends from the proximal end of the silicone body to the distal end of the silicone body,
• wherein the stent body further comprises skirt edges connected at two ends of the silicone body;
• and along an axial direction of the silicone stent, the skirt edges are located on two sides of the braided mesh frame, with an axial size L of the skirt edge satisfying 0≤L≤6 mm,
• wherein the silicone stent is configured to be received in an accommodation cavity of a delivery device in a contracted state, and to be released and implanted, under guide of a guide wire and under a side view of the flexible bronchoscope, in the trachea by the delivery device;
• wherein an outer peripheral wall of the stent body is provided with a plurality of protrusions, wherein the protrusions are so configured that when the silicone stent is implanted into the human trachea, the protrusions abut against an inner wall surface of the trachea, such that an outer peripheral surface of the stent body is separated from the inner wall surface of the trachea, so as to form a gap between the outer peripheral surface of the stent body and the inner wall surface of the trachea,
• wherein the plurality of protrusions comprise a plurality of columns of protrusions that are uniformly distributed along a circumferential direction of the stent body, and each column of protrusions comprise a plurality of protrusions disposed at intervals along an axial direction of the stent body, wherein protrusions in two adjacent columns of protrusions are alternately disposed along the axial direction of the stent body,
• wherein a thickness (h) of the protrusions satisfies 0.5 mm≤h≤4 mm.