NZ808066A

NZ808066A - Expandable Introducer Sheath for Medical Device

Info

Publication number: NZ808066A
Application number: NZ808066A
Authority: NZ
Inventors: Glen R Fantuzzi; Robert Fishman; Christopher Nason Korkuch; Alexander Ship; Robert Swierczek
Original assignee: Abiomed Inc
Filing date: 2019-02-15

Abstract

sheath assembly comprising an introducer sheath comprising: an expandable sheath frame having a length, a first thickness, a proximal end and a distal end; the frame comprising a plurality of strands extending longitudinally between the proximal end and the distal end, and having an exterior surface and an interior surface that form an interior lumen along the length of the frame; the frame being configured to achieve an expanded state and a contracted state, the expanded state forming an expanded cross-section in the lumen for passing a medical device therethrough; and the frame having a smooth coating about the exterior surface and protrusions extending into the lumen along the interior surface; and a dilator assembly comprising: an inner dilator having a first length, a lumen between proximal and distal ends of the inner dilator; an outer dilator having a second length and a lumen between proximal and distal ends of the outer dilator, wherein the outer dilator is coaxial with the inner dilator and the first length is greater than the second length; the outer dilator and the inner dilator are spaced apart radially by a circumferential gap having a gap thickness.

Claims

THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS:

1. A sheath assembly comprising an introducer sheath comprising: an expandable sheath frame having a length, a first thickness, a proximal end and a distal end; the frame comprising a plurality of strands extending longitudinally between the proximal end and the distal end, and having an exterior surface and an interior surface that form an interior lumen along the length of the frame; the frame being configured to achieve an expanded state and a contracted state, the expanded state forming an expanded cross-section in the lumen for passing a medical device therethrough; and the frame having a smooth coating about the exterior surface and protrusions extending into the lumen along the interior surface; and a dilator assembly comprising: an inner dilator having a first length, a lumen between proximal and distal ends of the inner dilator; an outer dilator having a second length and a lumen between proximal and distal ends of the outer dilator, wherein the outer dilator is coaxial with the inner dilator and the first length is greater than the second length; the outer dilator and the inner dilator are spaced apart radially by a circumferential gap having a gap thickness.

2. The sheath assembly of claim 1, wherein the inner dilator and outer dilator are configured to be inserted into the first lumen of the expandable sheath frame to adjust a diameter of the expandable sheath frame.

3. The sheath assembly of claim 2, wherein the head is bonded to the distal end of the dilator.

4. The sheath assembly of claim 3, wherein the second thickness is greater than the thickness of the sheath frame such that the sheath frame fits within the circumferential gap, the sheath tip fits within the sheath tip receptacle, and the second thickness is smaller than the thickness of the sheath tip such that the sheath tip is retained within the dilator tip