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RETAINING CAGE TO PERMIT RESHEATHING OF A TAVI AORTIC-FIRST TRANSAPICAL SYSTEM

  • US 20140107758A1
  • Filed: 03/06/2013
  • Published: 04/17/2014
  • Est. Priority Date: 10/12/2012
  • Status: Active Grant
First Claim
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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.

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