Apparatus and Method for Improved Deployment of Endovascular Grafts
AssigneeCook Medical Technologies LLC
InventorMatthew S. Huser
Life of this patent
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Abstract
Apparatus and methods for facilitating deployment of an implantable medical device including a stent graft. A restraining device, such as cord or suture, holds at least the proximal end of the stent in a radially inwardly compressed configuration during delivery to a desired location within the lumen of a patient's vessel. Withdrawal of one or more trigger wires facilitates the release and removal of the restraining cord from the proximal end of the stent so as to allow the stent to become fully deployed within vessel.
Claims20
An apparatus for deploying a stent comprising:
- a stent delivery device having a proximal end portion and a distal end portion;
- at least one stent carried on the proximal end portion of the delivery device, the stent having both an expanded configuration and a radially inward compressed configuration, the stent comprising a proximal end and a distal end;
- a restraining device comprising a releasable pattern circumferentially engaged with the stent proximal end portion and exerting a force on the stent in a radially inward direction, the restraining device releasably retaining the proximal stent end in the radially inward compressed condition;
- at least one release mechanism comprising a proximal end portion and a distal end portion, wherein the proximal end portion of the release mechanism is releasably coupled to the restraining device for selectively releasing the restraining device from the proximal stent end such that upon removal of the at least one release mechanism, the restraining device circumferentially disengages and the stent proximal end assumes the radially outward expanded position.
A method for deploying an endovascular prosthesis comprising the steps of:
- a. inserting a delivery device carrying the prosthesis into the lumen of a body passage, the prosthesis having at least a proximal end retained in a radially inwardly compressed delivery condition by a restraining device comprising a releasable pattern circumferentially engaged around at least a portion of the stent proximal end;
- b. withdrawing a sheath from the delivery device to expose at least a portion of the prosthesis;
- c. withdrawing a first release mechanism from the delivery device to facilitate the circumferential disengagement and release of the restraining device from the proximal end of the prosthesis to deploy the prosthesis in a radially outwardly expanded position;
- d. withdrawing the restraining device from the body passage;
- and
- e. retracting the delivery device from the body passage.
Dependencies are inferred from the claim text.