Covered stent and preparation method thereof
A stent-graft and film-covering technology, applied in the field of medical devices, can solve the problems of vascular side branch opening blockage, high restenosis rate, endothelial layer peeling, etc., and achieves low clinical stocking cost, simplified preparation process, and improved compliance. sexual effect
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[0059] Example one
[0060] figure 1 Shown is the front view of the stent covered with the membrane in the crimped state of the first embodiment of the present invention. figure 2 It is a side view of the stent covered with a membrane in a crimped state of the first embodiment of the present invention.
[0061] See figure 1 with figure 2 The stent graft includes a stent body 1 and a membrane tube 2 sleeved on the stent body 1, and the membrane tube 2 is in a contracted state and is directly attached to the outer surface of the stent body 1. In this way, without additional stitching, weaving and other processes, the outer layer of the stent body 1 can be covered with a layer of membrane material, so that the membrane material is closely attached to the surface of the stent body 1, thus a kind of coating The membrane tube 2 can be applied to the stent body 1 of various diameters, which improves the applicability of the stent graft and simplifies the preparation process. Moreover, ...
Example Embodiment
[0081] Example two
[0082] The difference between this embodiment and the first embodiment is that the size and shape of the film-coated pipe 3 of this embodiment have been adjusted. Specifically, when the stent body 1 is in the crimped state, the inner diameter of the covered tube 3 is larger than the outer diameter of the stent body 1 in the crimped state, but the covered tube 3 is sleeved on the stent body 1 Previously, it was folded or pressed to form a folded film-coated pipe 3. Otherwise, this embodiment is the same as the first embodiment. For details, please refer to the first embodiment.
[0083] In this embodiment, the wall thickness of the film-coated tube 3 before being folded or crimped is preferably less than or equal to 100 μm. For example, before preparation, select the stent body 1 with a diameter specification of 1.0mm (that is, the outer diameter in the crimped state) and a length of 28mm, and select a coated tube 3 with an inner diameter of 3.0mm, an outer di...
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