Embolic coil

A delivery system for a variable length detachable coil comprising:

• a catheter with an inner lumen and a distal end;
• a distal electrical terminal fixed within the inner lumen near the distal end of the catheter;
• a proximal electrical terminal fixed within the inner lumen near the distal end of the catheter;
• and,
• the detachable coil comprising a plurality of coil segments forming a plurality of detachment circuits;
• each of the detachment circuits being formed through 1) electrical contacts that are fixed to and protrude from outer surfaces of adjacent coil segments of the plurality of coil segments, and 2) a detachment capsule connected to the adjacent coil segments;
• wherein the electrical contacts on adjacent coil segments are spaced apart such that an electrical contact on a first adjacent coil segment contacts the distal electrical terminal and that an electrical contact on a second adjacent coil segment contacts the proximal electrical terminal.

A system for occluding a vascular deformation comprising:

• a variable length detachable coil including a plurality of coil segments separated by detachment capsules configured to selectively detach adjacent coil segments;
• the variable length detachable coil further comprising a plurality of detachment circuits formed through 1) electrical contacts that are fixed to and protrude from an outer surface of each of the adjacent coil segments, and 2) a detachment capsule connected to the adjacent coil segments;
• segments;
• and,
• a delivery system comprising:
• a catheter with an inner lumen and a distal end;
• a distal electrical terminal fixed within the inner lumen near the distal end of the catheter;
• and,
• a proximal electrical terminal fixed within the inner lumen near the distal end of the catheter;
• wherein the electrical contacts on the adjacent coil are spaced to align with the distal electrical terminal and the proximal electrical terminal.