Space filling devices

A device for occluding an aperture in a body of a patient, comprising:

• a plurality of wires having proximal end portions and distal end portions;
• a first termination element that is defined by the proximal end portions of the plurality of wires aggregated together;
• a second termination element that is defined by the distal end portions of the plurality of wires aggregated together;
• and
• a plurality of coil anchors,
• wherein adjacent wires of the plurality of wires are wound in opposite directions to create a balanced frame including
• a first wire of the plurality of adjacent wires extending from the first termination element in a first direction and
• a second wire of the plurality of adjacent wires, adjacent to the first wire, extending from the first termination element in a second direction, and
• wherein each wire of the plurality of wires defines one of first features and one of second features, and
• wherein the plurality of coil anchors are arranged about each of the second features and the second features are at least partially circumferentially surrounded by the first features relative to the longitudinal axis of the device and adjacent wires of the second features form a crossing pattern when viewed from one end of the device and along the longitudinal axis of the device, and
• wherein at least one of the plurality of coil anchors comprises:
• a first frame attachment portion extending along the second feature of the first wire, and
• a second frame attachment portion,
• wherein the second frame attachment portion comprises a coil, and
• wherein the coil coils around and covers both the second feature of the first wire and the first frame attachment portion, and
• an anchor portion,
• wherein the anchor portion extends from the first frame attachment portion and the second frame attachment portion,
• wherein the anchor portion includes a first end and a second end, and
• wherein the first end is connected to the first frame attachment portion,
• wherein the second end is connected to the second frame attachment portion, and
• wherein the first end and the second end cross over each other.