Patent ID: 8007509

Claim:
A coil assembly, comprising: a first embolic coil having a proximal end interlocking member; a second embolic coil having a distal end interlocking member engaged with the proximal end interlocking member of the first embolic coil, the second embolic coil having a predetermined secondary shape configured to be received at least partially within and engage a predetermined secondary shape of the first embolic coil when the respective first and second embolic coils are released within an aneurysm sac; and a delivery catheter containing the first embolic coil and the second embolic coil, the first embolic coil disposed farther from a proximal end of the catheter than the second embolic coil, wherein the proximal end interlocking member of the first embolic coil remains engaged with the distal end interlocking member of the second embolic coil when the respective coils are constrained within the delivery catheter, and the interlocking member of the first embolic coil is configured to disengage from the interlocking member of the second embolic coil when the respective coils are released out of a distal end opening of the delivery catheter; wherein the predetermined secondary shape of the first embolic coil is selected from a group consisting of helical, diamond, cone-shaped, basket-shaped, and spiral; and wherein the predetermined secondary shape of the second embolic coil is selected from a group consisting of C-shaped, straight, diamond, and J-shaped.