Variable cross-section conical vasoocclusive coils

摘要

The vasoocclusive device comprises an elongated wire helically wound into a tubular member having a first end, a second end, and an axis extending between the first and second ends. The helically wound tubular member has a first configuration conforming to a lumen within a constraining tubular member when constrained within that constraining tubular member. The helically wound tubular member has a second self-forming secondary configuration, different from the first configuration, when not constrained by the constraining tubular member. The helically wound tubular member has at least one region of flexibility which is more highly flexible than at least one region adjacent the at least one region of higher flexibility. The secondary configuration is conical in shape.