Vaso-occlusive coils with non-overlapping sections
View Patent ↗A vaso-occlusive implant has a primary helical-coil shape that defines a primary axis and a three-dimensional secondary shape. The secondary shape includes a substantially helical section and a second section having a plurality of non-overlapping loops or loop sections. Each loop defines a plane that is oriented at an angle from about 30-150 degrees relative to a plane defined by an immediately preceding or immediately succeeding loop along the primary axis. The coil sections or loops can be generally circular loops or other smooth shapes.
1. A vaso-occlusive coil having an elongate helical primary shape, the primary shape defining a primary axis, the coil further having a three-dimensional secondary shape, the secondary shape comprising a substantially helical first section having at least 10 complete loops and a second section having a plurality of non-overlapping loops, said non-overlapping loops comprising a section of the coil in which the primary helical coil is unwound, each loop defining a plane oriented at an angle from about thirty degrees to about one hundred fifty degrees relative to a plane defined by any immediately preceding or any immediately succeeding loop along the primary axis.
2. The coil of claim 1 , the loops including generally circular loops.
3. The coil of claim 1 , the loops including generally elliptical loops.
4. The coil of claim 1 , the primary shape being wound into the secondary shape, the loops being wound without contacting each other.
5. The coil of claim 1 , the loops of the secondary shape not contacting each other, absent a force being applied to the secondary shape.
6. The coil of claim 1 , the secondary shape further comprising a substantially helical third section, wherein the second section is disposed along the primary axis between the first and third sections.
7. The coil of claim 1 , each loop defining a plane oriented generally orthogonal to a plane defined by any immediately preceding or succeeding loop along the primary axis.
8. The coil of claim 1 , wherein at least two loops define respective planes disposed generally parallel to each other.
9. The coil of claim 1 , each loop defining a plane disposed generally parallel to a plane defined by another loop.
10. The coil of claim 1 , the second section having up to about fifteen loops.
11. The coil of claim 1 , at least one loop being wound about an axis for less than about three hundred sixty degrees.
12. The coil of claim 1 , at least one loop being wound around an axis for less than about two hundred seventy degrees.
13. The coil of claim 1 , at least one loop being wound around an axis for less than about one hundred eighty degrees.
14. The coil of claim 13 , wherein respective planes defining the first, second and third loops form a generally triangular configuration.
15. The coil of claim 1 , wherein said secondary shape further comprises a third helical section at least 10 complete loops, wherein said second section is between said first section and said second section.
16. A vaso-occlusive coil, comprising
a substantially helical primary shape defining a primary axis, the primary shape being wound into a three-dimensional secondary shape, the secondary shape comprising
a substantially helical first section having at least 10 complete loops, and
a second section immediately following the first section along the primary axis, the second section comprising a plurality of non-overlapping loops, said non-overlapping loops comprising a section of the coil in which the primary helical coil is unwound, and including a first loop, a second loop immediately following the first loop along the primary axis, and a third loop immediately following the second loop along the primary axis,
wherein the first loop defines a plane oriented at an angle of at least about thirty degrees relative to a plane defined by the second loop, and the second loop defines a plane oriented at an angle of at least about thirty degrees relative to a plane defined by the third loop.
17. The coil of claim 16 , the secondary shape further comprising a third section immediately following the second section along the primary axis.
18. The coil of claim 16 , the loops being wound without contacting one another.
19. The coil of claim 16 , the first loop defining a plane oriented generally orthogonal to a plane defined by the second loop, and the second loop defining a plane oriented generally orthogonal to a plane defined by the third loop.
20. The coil of claim 16 , the first loop defining a plane disposed generally parallel to a plane defined by the third loop.
21. The coil of claim 16 , the second section further comprising a fourth loop immediately following the third loop along the primary axis, wherein the third loop defines a plane oriented at an angle of at least about thirty degrees relative to a plane defined by the fourth loop.
22. The coil of claim 21 , the first loop defining a plane disposed generally parallel to a plane defined by either of the third or fourth loops.
23. The coil of claim 16 , wherein said secondary shape further comprises a third helical section having at least 10 complete loops, wherein said second section is between said first section and said second section.