VASO-OCCLUSIVE DEVICES

摘要

Vaso-occlusive device includes a coil having a proximal and a distal end; the coil comprises a helically wounded elongated member having a core and an outer layer, the outer layer made from a metal or alloy that has a different stiffness than a core's stiffness. Vaso-occlusive device includes a first coil and a second coil coupled to each other such that at least one loop from the first coil is between two adjacent loops from the second coil; the first coil is made from a first material, and the second coil is made from a second material stiffer than the first material. Vaso-occlusive device includes an outer coil having a plurality of loops that define a lumen therethrough, and an inner coil located within the lumen of the outer coil; each of the outer and the inner coils is made from a metal or an alloy.