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US 2022/0087712 A1Published application
Introducer with partially annealed reinforcement element and related systems and methods
AssigneeMerit Medical Systems, Inc.
InventorsDavid Cise, Doug Hales, Alex Singleton, Brian Heaton
Life of this patent
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Abstract
The present disclosure illustrates an introducer sheath with a partially annealed metal frame. The introducer sheaths described herein include a hub coupled to a shaft. The shaft comprises a braided wire frame with (i) an annealed distal portion that prevents the braided wire frame from unraveling at a distal end, and (ii) a second portion that is unannealed; a jacket encompassing the braided wire frame; and a liner forming an inner wall.
Claims20
An sheath comprising:
- a hub forming a chamber and comprising:
- a side port in fluid communication with the chamber, and
- an introducer bore with a seal to maintain hemostasis of the introducer sheath while allowing a medical instrument to be introduced through the introducer bore into the chamber;
- and
- a shaft coupled to the hub at a proximal end, the shaft forming a lumen that is in fluid communication with the chamber of the hub, the shaft comprising:
- a braided wire frame with an annealed distal portion preventing the braided wire frame from unraveling at a distal end during assembly, a second portion of the braided wire frame being unannealed, the second portion maintaining physical properties of spring temper wire.
- a jacket encompassing the braided wire frame, and
- a liner forming an inner wall, the liner encompassed by the braided wire frame.
5 more elements
A method of manufacturing a sheath, comprising:
- braiding metal wires to form a frame of a sheath shaft;
- annealing a distal portion of the frame to prevent the frame from unraveling at a distal end during assembly;
- reflowing a liner to an interior surface of the frame;
- reflowing a jacket to an exterior surface of the frame;
- and
- overmolding a hub around a proximal portion of the frame to prevent the frame from unraveling at a proximal end, the hub having a chamber in fluid communication with a hollow conduit formed from reflowing the liner and jacket to the frame, a side port in fluid communication with the chamber, and an introducer bore with a seal to maintain hemostasis of the introducer sheath while allowing a medical instrument to be introduced through the introducer bore into the chamber.
3 more elements
A method of manufacturing a sheath, comprising:
- extruding a nylon core;
- braiding metal wires over the nylon core to form a frame;
- heating and stretching the nylon core to reduce the diameter of the nylon core for removal of the frame;
- annealing a plurality of portions of the frame;
- reflowing a liner to an interior surface of the frame and a jacket to an exterior surface of the frame to form a composite conduit;
- cutting the composite conduit at the annealed portions to form a plurality of sheath shafts such that the annealed portions are located at a distal end of each of the plurality of sheath shafts, the annealed portions being less than a length of each of the sheath shafts;
- and
- overmolding a hub around a proximal portion of the sheath shafts.
5 more elements
Dependencies are inferred from the claim text.