RETAINING CAGE TO PERMIT RESHEATHING OF A TAVI AORTIC-FIRST TRANSAPICAL SYSTEM
First Claim
1. A medical device implantation system comprising:
- (a) a shaft extending in longitudinal directions;
(b) a medical device including a stent disposed around the shaft, the stent being expandable in radially outward directions transverse to the longitudinal directions;
(c) a sheath surrounding the shaft, the sheath being slidable relative to the shaft in a first longitudinal direction from a closed position in which the sheath surrounds the stent to an open position in which the sheath is longitudinally offset from the stent and in a second longitudinal direction from the open position towards the closed position; and
(d) a cage including a plurality of fingers, each finger having a first end attached to the shaft and extending in the second longitudinal direction from the first end, each finger having an engagement section extending radially outwardly of the stent over at least a portion of the stent adjacent the first end of the finger when the stent is in a collapsed condition, the engagement section of each finger being movable away from the shaft during expansion of the stent and being movable toward the shaft responsive to movement of the sheath relative to the shaft in the second longitudinal direction so that the stent can be collapsed by moving the sheath in the second longitudinal direction.
1 Assignment
0 Petitions
Accused Products
Abstract
A delivery device for an implantable medical device includes an inner shaft extending in a longitudinal direction and an outer shaft surrounding at least a longitudinal portion of the inner shaft. The outer shaft is slidable relative to the inner shaft in the longitudinal direction. A sheath surrounds a longitudinal portion of the outer shaft, the sheath having an outer diameter and being slidable in the longitudinal direction between a first position enclosing the medical device and a second position exposing the medical device to permit full functionality of the medical device. A retaining cage is coupled to the outer shaft, the retaining cage being configured and arrange to collapse the medical device during resheathing.
41 Citations
24 Claims
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1. A medical device implantation system comprising:
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(a) a shaft extending in longitudinal directions; (b) a medical device including a stent disposed around the shaft, the stent being expandable in radially outward directions transverse to the longitudinal directions; (c) a sheath surrounding the shaft, the sheath being slidable relative to the shaft in a first longitudinal direction from a closed position in which the sheath surrounds the stent to an open position in which the sheath is longitudinally offset from the stent and in a second longitudinal direction from the open position towards the closed position; and (d) a cage including a plurality of fingers, each finger having a first end attached to the shaft and extending in the second longitudinal direction from the first end, each finger having an engagement section extending radially outwardly of the stent over at least a portion of the stent adjacent the first end of the finger when the stent is in a collapsed condition, the engagement section of each finger being movable away from the shaft during expansion of the stent and being movable toward the shaft responsive to movement of the sheath relative to the shaft in the second longitudinal direction so that the stent can be collapsed by moving the sheath in the second longitudinal direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A medical device implantation system comprising:
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(a) a shaft extending in longitudinal directions; (b) a medical device including a stent disposed around the shaft, the stent being expandable in radially outward directions transverse to the longitudinal directions; (c) a sheath surrounding the shaft, the sheath being slidable relative to the shaft in a first longitudinal direction from a closed position in which the sheath surrounds the stent to an open position in which the sheath is longitudinally offset from the stent and in a second longitudinal direction from the open position towards the closed position; and (d) a retaining cage coupled to the shaft, the retaining cage being configured and arrange to collapse the medical device by moving the sheath relative to the shaft in the second longitudinal direction from an open position to a closed position. - View Dependent Claims (13, 14)
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15. A method of delivering an implantable medical device, comprising:
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(a) using a delivery system including (i) a shaft extending in first and second longitudinal directions and having radial directions transverse to the longitudinal directions, (ii) a medical device including a stent in a collapsed condition surrounding the shaft, (iii) a cage including longitudinally-extending fingers having first ends attached to the shaft and engagement sections disposed outwardly of the stent and (iv) a sheath in a closed position in which the sheath surrounds the stent and fingers, advancing the system until the device is disposed at a target location in the body of a subject; (b) moving the sheath relative to the shaft in the first longitudinal direction from the closed position to an open position in which the sheath is longitudinally offset from the stent and (b) expanding the stent until the stent is at least partially engaged with the body of the subject, the engagement sections of the fingers being displaced radially outwardly by expansion of the stent;
then(c) releasing the device from the cage and withdrawing the sheath, shaft and cage from the body of the subject. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification