Thermal detachment system for implantable devices
DCFirst Claim
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1. An implant device delivery system comprising:
- a delivery pusher having a proximal end and a distal end;
an electrically activated implant release member;
a pre-tensioned tether associated with the implant release member such that said tether is broken by the implant release member when energized;
a conductive core member having an externally exposed portion at said proximal end for connection to a power source;
an insulating layer disposed on at least a portion of said conductive core member near said proximal end; and
,a conductive layer disposed on at least a portion of said insulating layer, and having an externally exposed surface for connection to the power source;
wherein said conductive layer and said conductive core conduct an electrical current from said proximal end of said delivery pusher to said electrically activated implant release member;
wherein tension in the tether increases the rate at which the tether is broken once a circuit is closed between said externally exposed portion of said conductive core member and said externally exposed surface of said conductive layer.
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Abstract
The present invention provides for implant device delivery apparatuses and related methods of use. The delivery systems of the present invention incorporate a stretch resistant tube that advantageously makes the implant device, such as an embolic coil, stretch resistant while a delivery system is being used to position the implant device at a desired target site.
92 Citations
20 Claims
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1. An implant device delivery system comprising:
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a delivery pusher having a proximal end and a distal end; an electrically activated implant release member; a pre-tensioned tether associated with the implant release member such that said tether is broken by the implant release member when energized; a conductive core member having an externally exposed portion at said proximal end for connection to a power source; an insulating layer disposed on at least a portion of said conductive core member near said proximal end; and
,a conductive layer disposed on at least a portion of said insulating layer, and having an externally exposed surface for connection to the power source; wherein said conductive layer and said conductive core conduct an electrical current from said proximal end of said delivery pusher to said electrically activated implant release member; wherein tension in the tether increases the rate at which the tether is broken once a circuit is closed between said externally exposed portion of said conductive core member and said externally exposed surface of said conductive layer. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An implant device delivery system comprising:
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a delivery pusher having a proximal end and a distal end; a conductive core disposed along a length of said delivery pusher; an electrically actuated release mechanism located near said distal end of said delivery pusher; a pre-tensioned tether and associated with the release mechanism; a first electrical contact formed from an exposed section of said conductive core of said pusher near said proximal end;
said first electrical contact in electrical contact with said electrically actuated release mechanism; and
,a second electrical contact located near said proximal end, having an exposed substantially circumferential surface spaced distally of said first electrical contact such that a distal end of the first electrical contact is proximal of a proximal end of said second electrical contact, wherein said second electrical contact is in electrical contact with said electrically actuated release mechanism; wherein said first electrical contact and said second electrical contact are arranged to be connected to a detachable power source; wherein tension in the tether increases the rate at which the tether is broken once a circuit is closed between said externally exposed portion of said conductive core member and said externally exposed surface of said conductive layer. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A delivery device for an implant, comprising:
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a pusher releasably connected to an implantable device with a pre-tensioned tether; an electrically actuated implant release mechanism disposed near a distal end of said pusher for releasing said implantable device; and
,an open electrical circuit passing through said electrically actuated implant release mechanism; wherein said open electrical circuit is closable at a proximal end of said pusher by connecting a power source between an exposed portion of a conductive core wire and a conductive band on an outer surface of said pusher, said band having a proximal end spaced distally from a distal end of said exposed portion and electrically insulated from said conductive core wire; wherein tension in the tether increases the rate at which the tether is broken once said electrical circuit is closed.
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15. An implant delivery system having a distal end and a proximal end, the system comprising:
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a conductive core member; an insulating layer disposed on at least a portion of said conductive core member; a conductive layer electrically insulated from the conductive core member; and a conducting member coupled to a distal location near the distal end of the implant delivery system and to said conductive layer; wherein an exposed region of said conductive core member and said conductive layer are positioned near said proximal end, axially separated from each other, to connect to a handheld power source; wherein each of said conducting member and said conductive core member are electrically connected to a release mechanism at the distal end of the implant delivery system, said release mechanism in operable proximity to a pre-tensioned tether connecting an implant to said implant delivery system; wherein tension in the pre-tensioned tether increases the rate at which the tether is broken once a circuit is closed between said externally exposed portion of said conductive core member and said externally exposed surface of said conductive layer. - View Dependent Claims (16, 17, 18)
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19. A delivery device for an implant comprising:
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a core member; an insulating layer; a conductive layer; and
,an electrically actuated release mechanism; wherein said core member is electrically insulated from the conductive layer and wherein said conductive core and said conductive layer are in electrical contact with said electrically actuated release mechanism; wherein said core member has a proximal end that is exposed to form a first contact attachable to a power source and a conductive layer that has an outward facing exposed portion distal of the proximal end of the conductive core, the exposed portion forming a second contact for attachment to a power source, near a proximal end of said delivery device; wherein said first and second contacts are separated axially by a portion of said insulating layer; wherein said first and second contacts are each electrically connected to the electrically-activated release mechanism at the distal end of the implant delivery system, said electrically-activated release mechanism in operable proximity to a pre-tensioned tether connecting an implant to said implant delivery system; wherein tension in the pre-tensioned tether increases the rate at which the tether is broken once a circuit is closed between said externally exposed portion of said conductive core member and said externally exposed surface of said conductive layer. - View Dependent Claims (20)
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Specification