# US 2019/0167411 A1 · Endoleak preventing stent graft system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0167411 A1 - Document ID: US20190167411A1 - Status: Published application - Kind: A1 - Application number: 15/537,429 - Filed: 2015-12-18 - Published: 2019-06-06 - Earliest claimed: 2014-12-19 - Assignees: The Second Military Medical University - Applicants: The Second Military Medical University - Inventors: Junmin BAO; Jian DONG; Liangxi YUAN; Yanchun MENG; Jian ZHOU; Zaiping JING - Web page: https://patentgrep.com/patent/US20190167411A1 ## CPC - A61F 2/07: Stent-grafts - A61L 31/022: {Metals or alloys} - A61L 31/06: obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds {(A61L31/041 takes precedence)} - A61L 31/10: Macromolecular materials - A61L 31/146: {Porous materials, e.g. foams or sponges} - A61L 33/18: Use of ingredients of undetermined constitution or reaction products thereof - A61F 2002/077: {having means to fill the space between stent-graft and aneurysm wall, e.g. a sleeve} - A61F 2210/0076: multilayered, e.g. laminated structures - A61F 2230/0089: tetrahedral, i.e. having a triangular basis - A61F 2230/0091: helically-coiled or spirally-coiled, i.e. having a 2-D spiral cross-section - A61L 2400/04: Materials for stopping bleeding - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) - A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K) ## Abstract An endoleak preventing stent graft system, used for preventing the endoleaks except for type II endoleak, comprising: a metal mesh support layer fit for the shape of the artery blood vessel; a cover film layer covering on said metal mesh support layer; and a flexible mesh layer covering outside said cover film layer, said flexible mesh layer fills up the gap formed between said cover film layer and the inwall of said artery blood vessel under the effect of the flexibility of itself. ## Claims ### Claim 1 An endoleak preventing stent graft system, comprising: a metal mesh support layer fit for the shape of said artery blood vessel; a cover film layer covering the surface of said metal mesh support layer; and a flexible mesh layer positioned outside said cover film layer, said flexible mesh layer fills up the gap formed between said cover film layer and the inwall of said artery blood vessel under the effect of the flexibility of itself. ### Claim at position 2 -7. (canceled) ### Claim 8 (depends on 1) The endoleak preventing stent graft system according to claim 1, wherein said flexible mesh layer is formed by plural prisms with polyhedral shape. ### Claim 9 (canceled) ### Claim 10 (depends on 8) The endoleak preventing stent graft according to claim 8, wherein a part of said polyhedrons or all of said polyhedrons are hollowed out. ### Claim 11 (depends on 8) The endoleak preventing stent graft system according to claim 8, wherein said polyhedron is elongated triangular bipyramid. ### Claim at position 7 ˜55. (canceled) ### Claim 56 An endoleak preventing stent graft system, comprising: a metal mesh support layer fit for the shape of said artery blood vessel; a cover film layer covering the surface of said metal mesh support layer; and a villus layer covering outside said cover film layer, said villus layer fills up the gap formed between said cover film layer and the inwall of said artery blood vessel under the effect of the flexibility of itself. ### Claim 57 (canceled) ### Claim 58 (depends on 56) The endoleak preventing stent graft system according to claim 56, wherein said villus layer positioned outside said cover film layer at the proximal end or positioned outside said cover film layer at both the proximal end and the distal end, said villus layer comprises plural villi, the shape of said villi is linear shape or spiral shape or dendriform shape. ### Claim 59 (depends on 56) The endoleak preventing stent graft system according to claim 56, wherein the diameter of said villi is 25 μm, the length of said villi is within the range of 2 mm˜6 mm. ### Claim 60 (depends on 56) The endoleak preventing stent graft system according to claim 56, wherein said villi incline toward the distal end. ### Claim 61 (depends on 56) The endoleak preventing stent graft system according to claim 56, wherein said villus layer does not cover over the edges of both ends of said metal mesh support layer and said cover film layer. ### Claim 62 (depends on 56) The endoleak preventing stent graft system according to claim 56, wherein said villus layer is made from any material performing a function of adsorption of blood platelet and a function of starting the blood clotting mechanism. ### Claim 63 (depends on 56) The endoleak preventing stent graft system according to claim 56, wherein the material of said villus layer is poly (lactic-glycolic acid). ### Claim 64 (depends on 56) The endoleak preventing stent graft system according to claim 56, wherein said villus layer covering outside the whole stent. ### Claim at position 17 ˜69. (canceled) ### Claim 70 (depends on 56) The endoleak preventing stent graft system according to claim 56, wherein said cover film layer covering the inner surface of said metal mesh support layer. ### Claim 71 (depends on 70) The endoleak preventing stent graft system according to claim 70, wherein said villus layer positioned outside said cover film layer at the proximal end or positioned outside said cover film layer at both the proximal end and the distal end. ### Claim at position 20 ˜76. (canceled) ### Claim 77 (depends on 70) The endoleak preventing stent graft system according to claim 70, wherein said villus layer covering outside the whole stent. ### Claim at position 22 ˜82. (canceled) ### Claim 83 An endoleak preventing stent graft system, used for preventing the endoleaks except for type II endoleak, comprising: a metal mesh support layer fit for the shape of said artery blood vessel; a cover film layer covering on said metal mesh support layer; and a sponge layer positioned outside said cover film layer, said sponge layer fills up the gap formed between said cover film layer and the inwall of said artery blood vessel under the effect of the flexibility of itself. ### Claim 84 (depends on 83) The endoleak preventing stent graft system according to claim 83, wherein said sponge layer comprises plural even-distributed rhombus grids, and the longer diagonal of said rhombus is along with the direction of the blood flow.