Patent ID: 9592142
Date: 2017-03-14
CPC Classifications: A61F,Y10T

Claim:
1. A self-expanding medical device delivery system, comprising: an outer sheath extending along a proximal portion and a distal portion, said proximal portion being adapted to be attached to a deployment handle and remain outside of a patient's body, said distal portion being adapted to be positioned within said patient's body; a self-expanding medical device disposed within said distal portion of said outer sheath, said self-expanding medical device being in a compressed state and exerting an outward force against said outer sheath, wherein said outer sheath restrains said medical device from expanding; a first inner catheter disposed within said outer sheath and extending from adjacent a proximal end of said medical device to said deployment handle, said first inner catheter comprising a closed coil wire and a polymer outer layer adhered to an outer diameter of said closed coil wire, said first inner catheter comprising a stop surface adapted to abut said proximal end of said medical device, a ring attached to a distal end of said first inner catheter, said ring defining said stop surface and comprising an inner lumen extending therethrough with a diameter substantially equal to an inner diameter of said closed coil wire, said ring comprising a proximal portion with a reduced outer diameter, wherein a proximal end of said proximal portion abuts said closed coil wire and said outer layer is disposed over said proximal portion and is adhered to said reduced outer diameter; and a second inner catheter disposed within said closed coil wire and extending from past said stop surface and through said medical device to said deployment handle, said second inner catheter being unattached to said first inner catheter along a majority of a length between said deployment handle and said stop surface.