Mixed wire braided device with structural integrity
View Patent ↗A braided device comprising: filaments of a first type and of a second type, the second type differing from the first type in at least one characteristic; the first type of filaments defining an integral symmetrical 1×1 sub-pattern; and the combination of the first type of filaments and the second type of filaments being braided together into a braided device exhibiting a uniform braid pattern.
1. A braided device comprising:
a plurality (M) of filaments of a first type and a plurality (N) of filaments of a second type;
said filaments of the first type being substantially more rigid than the filaments of the second type;
the plurality (M) of filaments of the first type in said braided device being an even integer;
the ratio N/M being an odd integer;
said first type of filaments defining an integral axis symmetrical 1×1 sub-pattern producing a relatively stable axis symmetrical structure independent of the filaments of the second type and providing at least 75% of the rigidity of the braided device;
wherein the combination of said first type of filaments and said second type of filaments are braided together into a braided device exhibiting a uniform braid pattern.
2. A braided device according to claim 1 , wherein said braided device is an implantable intraluminal device.
3. A braided device according to claim 1 , wherein said integral axis symmetric 1×1 sub-pattern provides 90% of the rigidity of said braided device.
4. A braided device according to claim 1 , wherein said braided device is a stent-graft.
5. A braided device according to claim 1 , wherein said braided device is a filter.
6. A braided device according to claim 1 wherein said braid pattern is a single filament 1×1 braid pattern.
7. A braided device according to claim 1 wherein said braid pattern is a double filament 1×1 braid pattern.
8. A braided device according to claim 1 wherein said braid pattern is a 1×2 braid pattern.
9. A method for braiding comprising:
selecting a braiding apparatus having a number of horn gears, the number of horn gears being designated N;
selecting a first filament type and a second filament type, said filaments of the first type being substantially more rigid than the filaments of the second type; and
loading said first filament type on carriers on said horn gears, such that the number of horn gears being loaded, designated M, satisfy the equation N/M=odd integer, and M is an even integer, said horn gears being loaded symmetrically and evenly;
loading said second filament type on all unoccupied carriers on said horn gears; and
operating said braiding apparatus to produce a braided device having a braid pattern,
whereby said first filament type defines an integral axis symmetrical 1×1 sub-pattern producing a relatively stable axis symmetrical structure independent of the filaments of the second type and providing at least 75% of the rigidity of the braided device.
10. The method of claim 9 , wherein said integral axis symmetric 1×1 sub-pattern provides 90% of the rigidity of said braided device.
11. The method of claim 9 , wherein said braided device is an implantable intraluminal device.
12. The method of claim 9 , wherein said braided device is a stent.
13. The method of claim 9 , wherein said braided device is a stroke prevention device.
14. The method of claim 4 wherein said braid pattern is a single filament 1×1 braid pattern.
15. The method of claim 4 wherein said braid pattern is a double filament 1×1 braid pattern.
16. The method of claim 4 wherein said braid pattern is a 1×2 braid pattern.