Vasculature occlusion device detachment system with tapered corewire and heater activated fiber detachment
First Claim
1. A vasculature occlusion device detachment system comprising:
- a heating element of a predetermined resistivity;
the heating element having a proximal end and an opposite distal end;
a coil securing suture having a distal end and an opposite proximal end;
the proximal end of the coil securing suture terminating in a proximal bead retained within the heating element while the distal end of the coil securing suture extends beyond the distal end of the heating element;
the coil securing suture being rotatable, independently of the heating element, 360 degrees about a longitudinal axis extending therethrough the heating element;
an electrically conductive corewire having a proximal end and an opposite distal end;
the distal end of the electrically conductive corewire being, connected to the proximal end of the heating element; and
an insulated, electrically conductive wire separate from the electrically conductive corewire;
the insulated electrically conductive wire having a proximal end and an opposite distal end;
the distal end of the insulated electrically conductive wire being secured to the heating element at a heating-element-to-conductive wire connection;
wherein the heating element comprises a helically wound coil comprising a plurality of windings forming a proximal end, an opposite distal end and a central lumen defined longitudinally therethrough from the proximal to the distal end of the helically wound coil;
extending distally from the distal end of the helically wound coil is a substantially straight trailing section of coil bent backwards and threaded through the central lumen towards the proximal end of the helically wound coil foaming a primary distal loop disposed in a distal direction beyond the distal end of the helically wound coil;
a terminating end of the straight trailing section of the heating element extends beyond the proximal end of the helically wound coil;
the primary distal loop is bent approximately 90 degrees from an axial plane of the helically wound coil to configure a pre-formed heating element distal loop;
wherein the proximal bead is disposed entirely within the pre-formed heating element distal loop, not in the central lumen of the helically wound coil.
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Accused Products
Abstract
A vasculature occlusion device detachment system including a heating element of a predetermined resistivity. A coil securing suture terminates in a proximal bead retained within the heating element while the distal end of the coil securing suture extends beyond the distal end of the heating element and is attached to the proximal end of the vasculature occlusion device. The coil securing suture is independently rotatable of the heating element 360 degrees about a longitudinal axis extending therethrough the heating element. A power source applies electrical current to the heating element via an electrically conductive corewire and separate insulated electrically conductive wire to increase its resistance and, as a result of the heat produced, sever the coil securing suture.
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Citations
14 Claims
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1. A vasculature occlusion device detachment system comprising:
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a heating element of a predetermined resistivity;
the heating element having a proximal end and an opposite distal end;a coil securing suture having a distal end and an opposite proximal end;
the proximal end of the coil securing suture terminating in a proximal bead retained within the heating element while the distal end of the coil securing suture extends beyond the distal end of the heating element;
the coil securing suture being rotatable, independently of the heating element, 360 degrees about a longitudinal axis extending therethrough the heating element;an electrically conductive corewire having a proximal end and an opposite distal end;
the distal end of the electrically conductive corewire being, connected to the proximal end of the heating element; andan insulated, electrically conductive wire separate from the electrically conductive corewire;
the insulated electrically conductive wire having a proximal end and an opposite distal end;
the distal end of the insulated electrically conductive wire being secured to the heating element at a heating-element-to-conductive wire connection;wherein the heating element comprises a helically wound coil comprising a plurality of windings forming a proximal end, an opposite distal end and a central lumen defined longitudinally therethrough from the proximal to the distal end of the helically wound coil;
extending distally from the distal end of the helically wound coil is a substantially straight trailing section of coil bent backwards and threaded through the central lumen towards the proximal end of the helically wound coil foaming a primary distal loop disposed in a distal direction beyond the distal end of the helically wound coil;
a terminating end of the straight trailing section of the heating element extends beyond the proximal end of the helically wound coil;
the primary distal loop is bent approximately 90 degrees from an axial plane of the helically wound coil to configure a pre-formed heating element distal loop;
wherein the proximal bead is disposed entirely within the pre-formed heating element distal loop, not in the central lumen of the helically wound coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification