Deflatable bifurcated device
First Claim
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1. A method of forming a medical device for treating a bifurcated lumen, the method comprising:
- providing a balloon system disposed about a distal region of a catheter shaft, the balloon system including a first inflatable portion along a longitudinal axis of the catheter shaft and a second inflatable portion offset from the longitudinal axis of the catheter shaft, the second inflatable portion of including a polymer; and
modifying a region of the second inflatable portion of the balloon system to form a first section and a second section in the second inflatable portion, the second section having a greater crystallinity than the first section such that the first section is more flexible than the second section, wherein the second inflatable portion includes a plurality of alternating first and second sections forming a striped pattern, wherein the second section stripes have a width of about 0.1 mm to about 0.5 mm, wherein the striped pattern is formed at an oblique angle to the longitudinal axis of the catheter shaft.
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Abstract
A medical device for insertion and expansion within a bifurcated lumen is described. An expansion region of the device has regions thereon which, in some cases, enable the device to fold into a predetermined configuration upon deflation. The regions may be defined by differing modulus of the device material.
460 Citations
10 Claims
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1. A method of forming a medical device for treating a bifurcated lumen, the method comprising:
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providing a balloon system disposed about a distal region of a catheter shaft, the balloon system including a first inflatable portion along a longitudinal axis of the catheter shaft and a second inflatable portion offset from the longitudinal axis of the catheter shaft, the second inflatable portion of including a polymer; and modifying a region of the second inflatable portion of the balloon system to form a first section and a second section in the second inflatable portion, the second section having a greater crystallinity than the first section such that the first section is more flexible than the second section, wherein the second inflatable portion includes a plurality of alternating first and second sections forming a striped pattern, wherein the second section stripes have a width of about 0.1 mm to about 0.5 mm, wherein the striped pattern is formed at an oblique angle to the longitudinal axis of the catheter shaft. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A medical device for treating a bifurcated vessel, the medical device comprising:
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a catheter shaft having a proximal region and a distal region and a longitudinal axis; a first balloon disposed about the distal region of the catheter shaft along the longitudinal shaft; and a second balloon coupled to the distal region of the catheter shaft and disposed offset from the longitudinal axis, the second balloon having an inflatable region including a plurality of sections, wherein alternating sections have different flexibility and/or stiffness such that one section is more flexible than adjacent sections and/or is stiffer than adjacent sections, wherein the plurality of sections form a pattern of alternating flexibility and/or stiffness; wherein the pattern of alternating flexibility and/or stiffness in the sections is a pattern of stripes at an oblique angle to the longitudinal axis, wherein the pattern of stripes causes the second balloon to collapse into a predetermined configuration having one or more pleats. - View Dependent Claims (9, 10)
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Specification