Thrombus-taking bracket equipped with barbs in silk screen crossed positions

Abstract

The invention discloses a thrombus-taking bracket equipped with barbs in silk screen crossed positions, and belongs to the technical field of interventional therapy. The thrombus-taking bracket comprises a mesh cage formed by a nickel-titanium tube by laser cutting through high-temperature shaping, wherein the mesh cage comprises a plurality of elastic filaments, wherein the elastic wires intersect each other to form a plurality of intersection end surfaces; each of the intersection end surfaces is provided with a barb unit which extends towards the inner side of the inner mesh cage; each barbunit has a root portion which extends from one side, close to the distal end, of the intersection end surface portion; and the barb unit has an inclined rod which extends away from the root portion and obliquely extended in the distal direction. The thrombus-taking bracket has the advantages that the contact area between the thrombus-taking bracket and a thrombus can be more reasonably increased,and thrombus slipping is avoided; and in addition, a welded developing ring or a developing block is additionally arranged at the tail end of each barb unit, so that the positioning and developing effect of the bracket in a body can be enhanced.

Description

technical field [0001] The invention belongs to the field of interventional treatment instruments, and in particular relates to a thrombectomy bracket with barbs at the crossing positions of the wire mesh. Background technique [0002] The means of treating coronary artery and intracranial thrombosis generally require the use of drugs to dissolve thrombosis in the occluded area or use interventional surgery to absorb or capture thrombus in the occluded area. Among them, the therapeutic devices involved in capturing the thrombus include microcatheters, sheaths, guide wires, thrombus retrieval stents, and the like. Wherein the thrombectomy stent is the most critical element for catching thrombus. [0003] The thrombectomy stent is generally mesh-shaped, a mesh cage formed by laser-cutting a nickel-titanium tube, and adopting high-temperature shaping, which has a side near the distal end and a side near the proximal end. In order to avoid omission or falling of thrombus fragm...

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Problems solved by technology

[0004] The following are several existing patents on the overall structure of the thrombus retriever and the addition of the inner side to enhance the capture effect: (1) CN201610013494.6 discloses a blood vessel thrombus retrieval device with a thorn-like structure and a thrombus treatment instrument, however The scheme in this paper does not set the thorn-like structure in a more reasonable position in the cage, which may cause insufficient grasping force or inconvenience to be embedded in the grid unit; (2) CN201810763392.5 discloses a thrombus retrieval device, which The net pole unit has a targeted capture of hard thrombus and soft thrombus, and also strengthens the capture effect. However, it has not been disclosed whether the net pole unit has a better shape, and the net pole unit The positions arranged in the cage are also rarely disclosed; (3) CN201711466707.1 discloses a thrombus retriever, which has a catch rod that enhances the effect of catching thrombus, and any two of the catch rods are However, there is still a lack of information on the optimization and improvement of the specific shape of the capture rod; (4) US20190216476A1 discloses a thrombus removal bracket and its improved structure. block, and this structure can also better prevent thrombus fragments from being left in the diseased blood vessel during the capture process

[0005] Although many of the existing patents have more or less disclosed the technical features of enhanced capture, none of the above-mentioned existing patents can reflect a better and more reasonable thrombus capture effect, and can also take into account that the thrombus retriever has not yet been developed. Convenience when unfolded and stowed in the microcatheter

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