Delivery System With Profiled Sheath Having Balloon-Oriented Position
First Claim
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1. A delivery system, comprising:
- a catheter having a distal end and a proximal end;
a balloon positioned at the distal end of the catheter, the balloon comprising at least two wing portions wrapped about the distal end of the catheter;
a medical device, having a compressed state and an expanded state, positioned about the balloon portion; and
a sheath positioned about the medical device to hold the medical device in the compressed state, the sheath comprising;
a distal sheath portion located at a distal end of the sheath, the distal sheath portion having a first diameter and a first longitudinal length;
a transition portion, of a second longitudinal length, having a distal end located adjacent the proximal end of the distal sheath portion, the distal end of the transition portion being of the first diameter and having a proximal end with a second diameter greater than the first diameter;
a body portion of a third longitudinal length, having a distal end adjacent a proximal end of the transition portion, the body portion being of the second diameter; and
an opening provided in an outer surface of the sheath,wherein the opening is located on the positioned sheath in a predetermined relation to the at least two wing portions of the balloon.
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Abstract
A delivery system for delivering a self-expanding medical device such as a stent. The delivery system includes a sheath profiled or shaped to reduce instances of interference between a distal edge of the sheath and a vessel or with any lesion or lesions that might be present in the vessel. The sheath is formed by modifying a cylinder of sheath material to include three portions and an initiation slit that controls the rupturing of the sheath to facilitate delivery of the medical device. The initiation slit is positioned on the delivery system with respect to a configuration of a balloon portion of the system.
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Citations
17 Claims
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1. A delivery system, comprising:
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a catheter having a distal end and a proximal end; a balloon positioned at the distal end of the catheter, the balloon comprising at least two wing portions wrapped about the distal end of the catheter; a medical device, having a compressed state and an expanded state, positioned about the balloon portion; and a sheath positioned about the medical device to hold the medical device in the compressed state, the sheath comprising; a distal sheath portion located at a distal end of the sheath, the distal sheath portion having a first diameter and a first longitudinal length; a transition portion, of a second longitudinal length, having a distal end located adjacent the proximal end of the distal sheath portion, the distal end of the transition portion being of the first diameter and having a proximal end with a second diameter greater than the first diameter; a body portion of a third longitudinal length, having a distal end adjacent a proximal end of the transition portion, the body portion being of the second diameter; and an opening provided in an outer surface of the sheath, wherein the opening is located on the positioned sheath in a predetermined relation to the at least two wing portions of the balloon. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of creating a medical device delivery system, the method comprising:
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providing a catheter having a distal end and a proximal end; wrapping at least two wing portions of a balloon about the distal end of the catheter; positioning a medical device about the balloon, the medical device configurable in one of;
a compressed state and an expanded state; andproviding a sheath about the medical device to hold the medical device in the compressed state about the folded balloon, wherein providing the sheath comprises; providing a distal sheath portion at a distal end of the sheath, wherein the distal sheath portion has a first diameter and a first longitudinal length; providing a transition portion, of a second longitudinal length, having a distal end located adjacent a proximal end of the distal sheath portion, the distal end of the transition portion being of the first diameter and providing a proximal end of the transition portion with a second diameter greater than the first diameter; providing a body portion, of a third longitudinal length, having a distal end adjacent a proximal end of the transition portion, the body portion being of the second diameter; and providing an opening in an outer surface of the sheath; and locating the opening in the outer surface of the positioned sheath at a location in a predetermined relation to the at least two wing portions of the balloon. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification