Bronchial fistula closure device
A technology of bronchial fistula and equipment, which is applied in the field of bronchial fistula closure equipment, to achieve the effect of accelerating endothelialization, less tissue stimulation, and promoting endothelial adhesion
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Embodiment 1
[0028] The present invention is a bronchial fistula sealing device, such as figure 1 As shown, it includes four parts: a metal grid frame 1 woven with nickel-titanium alloy wires, a medical suture, a polymer elastic film, and a tightening thread. The two ligature ends of the metal grid frame 1 are kneaded and fixed by stainless steel sleeves 2, and the metal grid frame 1 is made as follows: figure 1 As shown in the "I"-shaped structure, 2-5 layers of polymer elastic films are sewn with medical sutures in the metal grid frame 1 . The metal grid frame 1 includes a large disk surface 4 and a small disk surface 5, and the large disk surface 4 and the small disk surface 5 are connected by a waist 3.
[0029] The tightening thread is passed through the metal grid 1 and the polymer elastic film by sutures, and is knotted with stainless steel sleeves 2 at both ends of the metal grid 1 to form a circular loop.
[0030] The large plate 4 is on the outside of the thorax / body, and the s...
Embodiment 2
[0042] Such as figure 2 As shown, there is a layering phenomenon on the edge of the large disk 4, that is, the thickness of the disk is increased, which can prevent the edge of the disk from wearing the tissue around the fistula and reduce the stimulation to the human body. At the same time, the thickened disk surface (that is, the disk surface of the large disk surface 4) can be laminated on the inner side of the fistula opening in steps to further ensure the sealing performance of the blockage.
[0043] Others are the same as in Example 1.
Embodiment 3
[0045] Such as image 3 As shown, the present invention is compounded and strengthened by inner and outer double-layer nets, and the inner net is woven by thicker nickel-titanium wire, that is, the nickel-titanium wire of the inner net is thicker than the nickel-titanium wire of the waist 3, and its shape is a two-end Concave cylindrical shape. In this embodiment, the outer mesh (that is, the nickel-titanium wire woven into the metal grid 1) is relatively soft and less irritating to the surrounding tissue of the fistula, and the inner mesh is hard to ensure the radial support force of the occlusion device at the waist.
[0046] At the same time, the shape memory retraction of the inner mesh also helps to close and fix the two ends of the occlusion device, realizing the “drinking glass” shape on both sides of the occlusion, while further enhancing the radial support force of the waist 3 and the relationship between the disk surface and the surrounding tissues of the present inv...
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