STENT DELIVERY CATHETER
First Claim
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1. A stent delivery assembly comprising:
- a shaft having a proximal region and a distal region;
a self-expanding stent disposed about at least a portion of the distal region of the shaft;
a sheath having a proximal end and a distal end, the sheath disposed around at least the distal region of the shaft and the self-expanding stent, wherein the sheath is configured to be retracted from the self-expanding stent to deploy the self-expanding stent; and
a tubular tapered tip coupled to the distal end of the sheath, the tubular tapered tip having a region predisposed to fracturing.
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Abstract
A self-expanding stent delivery assembly includes a shaft having a proximal end, a distal end, a distal region, a lumen, and a longitudinal axis. A retractable sheath having an outer surface, a proximal end and a distal end is co-axially disposed around the shaft distal region. A stent is disposed co-axially between the shaft and the retractable sheath. A tubular tapered tip is affixed to the retractable sheath distal end. The tubular tapered tip has an elongate region predisposed to fracturing. Methods of delivering a self-expanding stent are also described.
138 Citations
20 Claims
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1. A stent delivery assembly comprising:
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a shaft having a proximal region and a distal region; a self-expanding stent disposed about at least a portion of the distal region of the shaft; a sheath having a proximal end and a distal end, the sheath disposed around at least the distal region of the shaft and the self-expanding stent, wherein the sheath is configured to be retracted from the self-expanding stent to deploy the self-expanding stent; and a tubular tapered tip coupled to the distal end of the sheath, the tubular tapered tip having a region predisposed to fracturing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A stent delivery assembly comprising:
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a shaft having a proximal region and a distal region; a stent disposed about at least a portion of the distal region of the shaft; a sheath having a proximal end and a distal end, the sheath moveable between at least a first position and a second position, when in the first position, the sheath is disposed around the distal region of the shaft and the self-expanding stent, when the sheath is in the second position, the sheath is disposed around the distal region of the shaft with the distal end of the shaft being proximal of a proximal end of the stent, wherein the movement of the sheath between the first position and the second position deploys the stent; and a tubular tapered tip coupled to the distal end of the sheath, the tubular tapered tip having a region predisposed to fracturing, wherein moving the sheath from the first position to the second position causes the region predisposed to fracturing to fracture. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A method of delivering a self-expanding stent to a target site in a vessel, the method comprising:
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positioning a stent delivery device at the target site in the vessel, the stent delivery device comprising; a self-expanding stent disposed about at least a portion of the distal region of the shaft; a sheath having a proximal end and a distal end, the sheath disposed around at least the distal region of the shaft and the self-expanding stent, wherein the sheath is configured to be retracted from the self-expanding stent to deploy the self-expanding stent; and a tubular tapered tip coupled to the distal end of the sheath, the tubular tapered tip having a region predisposed to fracturing; and retracting the sheath from the stent to deploy the stent at the target site, wherein the retracting causes the region predisposed to fracturing to fracture. - View Dependent Claims (19, 20)
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Specification