Device delivery system with two stage withdrawal
First Claim
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1. A delivery system, comprising:
- a catheter having a distal end and distal portion;
a balloon portion disposed on the distal portion of the catheter;
a sheath disposed about the balloon portion;
a first catheter stop disposed on the catheter at a first location a first distance from the distal end of the catheter; and
a sheath ring fixedly coupled with the sheath and slidable on the catheter proximal to the first catheter stop, the first catheter stop being configured such that as the catheter is moved proximally relative to the sheath, the first catheter stop engages the sheath ring and moves the sheath proximally.
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Abstract
A medical device delivery system provides for a two-stage withdrawal of a deflated balloon portion of a catheter and the remains of a ruptured sheath. The deflated balloon portion is withdrawn from within an expanded medical device a predetermined distance before the remains of the ruptured sheath begins being removed from between the expanded device and a vessel wall. Initiating removal of the deflated balloon portion before the sheath reduces a total amount of drag that is exerted against a self-expanding medical device that has been deployed in a vessel.
25 Citations
13 Claims
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1. A delivery system, comprising:
- a catheter having a distal end and distal portion;
a balloon portion disposed on the distal portion of the catheter; a sheath disposed about the balloon portion; a first catheter stop disposed on the catheter at a first location a first distance from the distal end of the catheter; and a sheath ring fixedly coupled with the sheath and slidable on the catheter proximal to the first catheter stop, the first catheter stop being configured such that as the catheter is moved proximally relative to the sheath, the first catheter stop engages the sheath ring and moves the sheath proximally. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- a catheter having a distal end and distal portion;
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11. A method of delivering a medical device to a predetermined location in a vessel of a body, the method comprising:
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constraining the medical device in a compressed state on a catheter with a sheath; maneuvering a delivery system to position the constrained medical device substantially adjacent to the predetermined location; releasing the medical device from its compressed state to deploy substantially at the predetermined location in the vessel; and withdrawing the catheter proximally and sliding the catheter relative to the sheath, and continuing withdrawal of the catheter to engage a member fixedly coupled to the sheath so as to urge the sheath proximally together with the catheter. - View Dependent Claims (12, 13)
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Specification