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US 2014/0236279 A1Published application
Inner catheter arrangement for a self-expanding medical device delivery system
AssigneeCook Medical Technologies LLC
InventorsConor M. Dillon, John Neilan
Life of this patent
Estimating the term…
Abstract
A delivery system for a self-expanding medical device is provided. The delivery system includes an outer sheath that radially restrains the medical device. First and second inner catheters are disposed within the outer sheath. The first inner catheter is a composite structure with a closed coil wire covered by a polymer outer layer. The second inner catheter is disposed within the closed coil wire but is not attached to the closed coil wire.
Claims21
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;
- 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.
2 more elements
A method of manufacturing a self-expanding medical device delivery system, comprising:
- compressing and loading a self-expanding medical device into a distal end of an outer sheath, said outer sheath thereby restraining said medical device from expanding,
- bonding a pusher ring to a distal end of a first inner catheter, said pusher ring being adapted to abut a proximal end of said medical device, said first inner catheter and said pusher ring comprising an inner lumen extending therethrough;
- bonding an atraumatic tip onto a distal end of a second inner catheter;
- sliding said first inner catheter through a proximal end of said outer sheath, sliding said second inner catheter through a distal end of said outer sheath, said second inner catheter sliding within said inner lumen of said first inner catheter;
- positioning said pusher ring adjacent said proximal end of said medical device, and positioning said tip adjacent a distal end of said medical device;
- and
- fixing proximal ends of said first inner catheter and said second inner catheter together while leaving a remaining length of said first inner catheter and said second inner catheter unattached.
4 more elements
Dependencies are inferred from the claim text.