Edge Protection via Tapered Balloon Wrap
First Claim
Patent Images
1. A balloon catheter comprising:
- a catheter shaft and an expandable balloon, the expandable balloon having an expanded state and an unexpanded state, a proximal end and a distal end, the expandable balloon being positioned around a distal region of the catheter shaft, the expandable balloon having a length, and being defined by a proximal end, a distal end, and a working portion extending therebetween, in the unexpanded state the expandable balloon comprising a collapsed portion disposed about the catheter shaft and at least one wing extending from the collapsed portion, the wing having a wrapped state and an unwrapped state, in the wrapped state the wing is wrapped about the collapsed portion,wherein the wing in the wrapped state provides a surface of the balloon which extends further outward in a radial direction from the catheter shaft at the distal end of the balloon than at the proximal end of the balloon.
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Accused Products
Abstract
A stent deployment device is provided with a tapered balloon wrap to protect the edge of a crimped stent during stent deployment. The balloon is wrapped unevenly so that the distal end is looser and has a wider circumference than the proximal end of the balloon. With a stent crimped upon such a balloon, the distal balloon end billows out and covers the distal edge of the stent. This shielding billow prevents the stent edge from becoming damaged or causing harm if the stent is distally impacted while traversing body vessels on the way to the deployment site.
58 Citations
16 Claims
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1. A balloon catheter comprising:
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a catheter shaft and an expandable balloon, the expandable balloon having an expanded state and an unexpanded state, a proximal end and a distal end, the expandable balloon being positioned around a distal region of the catheter shaft, the expandable balloon having a length, and being defined by a proximal end, a distal end, and a working portion extending therebetween, in the unexpanded state the expandable balloon comprising a collapsed portion disposed about the catheter shaft and at least one wing extending from the collapsed portion, the wing having a wrapped state and an unwrapped state, in the wrapped state the wing is wrapped about the collapsed portion, wherein the wing in the wrapped state provides a surface of the balloon which extends further outward in a radial direction from the catheter shaft at the distal end of the balloon than at the proximal end of the balloon. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of deploying a medical device comprising the steps of:
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i) providing a medical device crimped about a balloon catheter, the balloon catheter having; a catheter shaft and an expandable balloon, the expandable balloon having an expanded state and an unexpanded state, a proximal end and a distal end, the expandable balloon being positioned around a distal region of the catheter shaft, the expandable balloon having a length, the balloon being defined by a proximal end, a distal end, and a working portion extending therebetween, in the unexpanded state the expandable balloon comprising a collapsed portion disposed about the catheter shaft and at least one wing extending from the collapsed portion, the wing wrapped about the collapsed portion wherein the wing is more tightly wrapped about the collapsed portion at the distal end of the balloon than at the proximal end of the balloon; ii) positioning the medical device at a position in a patient'"'"'s body; and iii) inflating the expandable balloon.
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16. A balloon catheter comprising:
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a catheter shaft and an expandable balloon, the expandable balloon having an expanded state and an unexpanded state, a proximal end and a distal end, the expandable balloon being positioned around a distal region of the catheter shaft, the expandable balloon having a length, the balloon being defined by a proximal end, a distal end, and a working portion extending therebetween, in the unexpanded state the expandable balloon comprising a collapsed portion disposed about the catheter shaft and at least one wing extending from the collapsed portion, the wing wrapped about the collapsed portion the wing bulging radially outward from catheter shaft at the distal end of the balloon as compared to the proximal end of the balloon.
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Specification