JP2018525129A5

JP2018525129A5 -

Info

Publication number: JP2018525129A5
Application number: JP2018510366A
Authority: JP
Filing date: 2016-08-26
Publication date: 2019-10-03
Anticipated expiration: 2036-08-26

Claims

A device for removing an implant from a body vessel, said device comprising:
A sheath assembly comprising an outer sheath assembly and an inner sheath assembly ;
A handle assembly comprising a trigger and a cylindrical cam cylinder ;
With
The outer sheath assembly comprises an outer sheath, at least a portion of said outer sheath comprises an outer hypotube,
The inner sheath assembly comprises an inner sheath and a tip, and at least a portion of the inner sheath comprises an inner hypotube;
The inner sheath comprises a proximal end and a distal end, and the distal end of the inner sheath is coupled to the tip ;
The trigger comprises a trigger pin; the tubular cam cylinder comprises a tubular cam cylinder slot for receiving the trigger pin and cooperating with the trigger pin; and the proximal end of the inner sheath comprises:
(1) During the first operation of the trigger for moving the trigger pin proximally in the longitudinal direction, the cylindrical cam cylinder rotates in the first direction, whereby the tip portion moves in the longitudinal direction. While rotating the tip in the first direction,
(2) During the second operation of the trigger for moving the trigger pin proximally in the longitudinal direction, the cylindrical cam cylinder rotates in the second direction, whereby the tip portion moves in the longitudinal direction. during and are, to rotate the distal portion in the second direction,
Coupled to the cylindrical cam cylinder,
device.

The device of claim 1, wherein the outer sheath assembly is stationary and the inner sheath assembly is rotatable.

The device of claim 1, wherein the tip has a cutting surface.

Wherein with the outer sheath assembly outside the band, said outer band is coupled to the pin, since the tip, coupling the distal end of the inner sheath assembly to the outer band of the outer sheath assembly 4. The device of claim 3 , comprising a cam slot for receiving and cooperating with the pin .

The device of claim 1, wherein the handle assembly further comprises an assembly of springs coupled to the trigger.

The device of claim 5 , wherein the spring is a constant load spring.

The device of claim 1, wherein the outer hypotube is laser cut and the inner hypotube is laser cut.

The outer hypotube comprises a first outer segment and a second outer segment, the inner hypotube comprises a first inner segment and a second inner segment, and the first outer segment is the second outer segment. is distal segment, said first inner segment Ru distal near the second inner segment, the device according to claim 1.

The first outer segment has a first outer flexibility and a first outer length; the second outer segment has a second outer flexibility and a second outer length; The first inner segment has a first inner flexibility and a first inner length; the second inner segment has a second inner flexibility and a second inner length; 9. The device of claim 8, wherein the first outer flexibility is higher than the second outer flexibility, and the first inner flexibility is higher than the second inner flexibility.

The first outer flexibility is constant along the first outer length; the second outer flexibility is variable along the second outer length; The device of claim 9, wherein inner flexibility is constant along the first inner length and the second inner flexibility is variable along the second inner length.

The device of claim 10, wherein the first outer length is shorter than the first inner length.

The device of claim 11, wherein the first outer flexibility is lower than the first inner flexibility.

The device of claim 9, wherein the second outer flexibility is lower than the second inner flexibility.

An inner distal end of a first inner length is axially aligned with an outer distal end of a first outer length , and the first inner length is axially aligned with the first outer length. The device of claim 8, wherein the device is longer than the first outer length so as to overlap.

A second outer length having an outer distal end and an outer proximal end ; a second inner length having an inner distal end and an inner proximal end; and the outer side of the second inner length. The device of claim 14, wherein a distal end axially overlaps a second outer distal end of the second outer length and a proximal end of a third outer length.