Anchor assemblies in stretch-resistant vaso-occlusive coils

A catheter assembly for occluding a body cavity, comprising:

• a delivery device having a distal end;
• and
• a vaso-occlusive device associated with the distal end of the delivery device, the vaso-occlusive device comprising:
• an outer primary coil having a proximal end, a distal end, and a lumen;
• a stretch-resisting member extending through at least a portion of the coil lumen and being coupled to the primary coil;
• and
• an anchor assembly located within the coil lumen, the anchor assembly comprising an anchor coil and a link fixedly coupled between the anchor coil and the stretch-resisting member.

A vaso-occlusive device, comprising:

• an outer primary coil having a proximal end, a distal end, and a lumen;
• a stretch-resisting member extending through at least a portion of the lumen and being coupled to the primary coil;
• and
• an anchor assembly located within the coil lumen, the anchor assembly comprising an anchor chain having at least a proximal twisted link fixedly coupled to the primary coil and a distal link fixedly coupled to the stretch-resisting member.

A catheter assembly for occluding a body cavity, comprising:

• a delivery device having a distal end;
• and
• a vaso-occlusive device associated with the distal end of the delivery device, the vaso-occlusive device comprising:
• an outer primary coil having a proximal end, a distal end, and a lumen;
• a stretch-resisting member extending through at least a portion of the lumen and being coupled to the primary coil;
• and
• an anchor assembly located within the coil lumen, the anchor assembly comprising an anchor chain having at least a proximal twisted link fixedly coupled to the primary coil and a distal link fixedly coupled to the stretch-resisting member.

A vaso-occlusive device, comprising:

• an outer primary coil having a proximal end, a distal end, and a lumen;
• a stretch-resisting member extending through at least a portion of the coil lumen and being coupled to the primary coil;
• and
• an anchor assembly located within the coil lumen, the anchor assembly comprising one or more flexible joints and being fixedly coupled to the outer primary coil and the stretch-resisting member.

A catheter assembly for occluding a body cavity, comprising:

• a delivery device having a distal end;
• and
• a vaso-occlusive device associated with the distal end of the delivery device, the vaso-occlusive device comprising:
• an outer primary coil having a proximal end, a distal end, and a lumen;
• a stretch-resisting member extending through at least a portion of the coil lumen and being coupled to the primary coil;
• and
• an anchor assembly located within the coil lumen, the anchor assembly comprising one or more flexible joints and being fixedly coupled to the outer primary coil and the stretch-resisting member.

A vaso-occlusive device, comprising:

• an outer primary coil having a proximal end, a distal end, and a lumen;
• a stretch-resisting member extending through at least a portion of the coil lumen and being coupled to the primary coil;
• and
• an anchor assembly fixedly coupled with the primary outer coil, the anchor assembly comprising an anchor coil having windings that are disposed between the windings of the outer coil.

A catheter assembly for occluding a body cavity comprising:

• a delivery device having a distal end;
• and
• a vaso-occlusive device associated with the distal end of the delivery device, the vaso-occlusive device comprising:
• an outer primary coil having a proximal end, a distal end, and a lumen;
• a stretch-resisting member extending through at least a portion of the coil lumen and being coupled to the primary coil;
• and
• an anchor assembly fixedly coupled with the primary outer coil, the anchor assembly comprising an anchor coil having windings that are disposed between the windings of the outer coil.

A method of manufacturing a vaso-occlusive having an anchor assembly, comprising:

• winding a first wire into a first helical coil having a proximal end, a distal end, and a lumen extending therethrough, wherein the proximal end of the first helical coil has open-pitched windings;
• winding a second wire into a second helical coil having a proximal end, a distal end, and a lumen extending therethrough, wherein the second helical coil has open-pitched windings;
• and
• incorporating the second helical coil into the first helical coil, such that the open-pitched windings of the second helical coil are disposed between adjacent open-pitched windings of the first helical coil.

A vaso-occlusive device, comprising

• a plurality of primary coils, each having a proximal end, a distal end, and a lumen;
• a plurality of stretch-resisting members, each extending through at least a portion of a respective primary coil;
• and
• one or more detachable joints located between adjacent primary coils.

A catheter assembly for occluding a body cavity, comprising:

• a delivery device having a distal end;
• and
• a vaso-occlusive device associated with the distal end of the delivery device, the vaso-occlusive device comprising:
• a plurality of primary coils having a proximal end, a distal end, and a lumen;
• a plurality of stretch-resisting members, each stretch-resisting member extending through at least a portion of a respective primary coil and being coupled to the respective primary coil;
• and
• one or more severable joints located between adjacent primary coils.