Patent ID: 7238194

Claim:
An assembly for implanting an occlusion coil in a body cavity or a blood vessel via a catheter comprising: (a) an occlusion coil comprising at least one electrolytically corrodable location; (b) at least one longitudinally flexible safety element extending into at least a part of a length of the occlusion coil, said safety element comprising a material with shape memory; and (c) a plurality of microcoils rigidly connected to said safety element and the occlusion coil for securing said safety element to the occlusion coil; wherein the safety element is sized to be longer than the part of the occlusion coil over which it extends so that the safety element is not subject to any tensile stress in the absence of an external force; and wherein a first microcoil connects the distal end of said electrolytically corrodable location with a second microcoil and the second microcoil is connected with the occlusion coil.