Balloon catheter system for treating vascular occlusions
First Claim
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1. A balloon catheter comprising:
- a hollow inner shaft disposed within a hollow outer shaft such that the distal end of the inner shaft extends beyond the distal end of the outer shaft, wherein the lumen of said inner shaft is suitable for allowing the passage of a guidewire through all or part of its length;
a balloon attached at its proximal end to said outer shaft and at its distal end to said inner shaft; and
means for the introduction of an inflation fluid into the annular space formed between the inner surface of the outer shaft and the outer surface of the inner shaft and therefrom into the lumen of said balloon, and for the removal thereof;
wherein the inner shaft is constructed such that following radial expansion of the balloon to a first expanded state, said inner shaft is capable of responding to further longitudinal expansion of the balloon to a second expanded state by increasing its length from a resting value, and of responding to subsequent partial deflation back to said first expanded state by reducing its length back to said resting value.
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Abstract
The present invention provides a balloon catheter comprising: a hollow inner shaft disposed within a hollow outer shaft; a balloon attached at its proximal end to said outer shaft and at its distal end to said inner shaft; wherein the inner shaft is constructed such that following radial expansion of the balloon to a first expanded state, said inner shaft is capable of responding to further longitudinal expansion of the balloon to a second expanded state by increasing its length from a resting value, and of responding to subsequent partial deflation back to said first expanded state by reducing its length back to said resting value.
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Citations
39 Claims
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1. A balloon catheter comprising:
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a hollow inner shaft disposed within a hollow outer shaft such that the distal end of the inner shaft extends beyond the distal end of the outer shaft, wherein the lumen of said inner shaft is suitable for allowing the passage of a guidewire through all or part of its length;
a balloon attached at its proximal end to said outer shaft and at its distal end to said inner shaft; and
means for the introduction of an inflation fluid into the annular space formed between the inner surface of the outer shaft and the outer surface of the inner shaft and therefrom into the lumen of said balloon, and for the removal thereof;
wherein the inner shaft is constructed such that following radial expansion of the balloon to a first expanded state, said inner shaft is capable of responding to further longitudinal expansion of the balloon to a second expanded state by increasing its length from a resting value, and of responding to subsequent partial deflation back to said first expanded state by reducing its length back to said resting value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 18)
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11. A balloon catheter comprising a conduit having a proximal portion and a distal portion,
wherein said proximal portion contains two separate lumens, one of said lumens being suitable for allowing the passage of a guidewire therethrough, the other lumen being suitable for allowing passage of a fluid, wherein said distal portion is a single-lumen conduit that is in fluid communication with the guidewire lumen of said proximal portion, wherein a balloon is attached at its proximal end to the outer surface of said proximal portion and at its distal end to said distal portion, and wherein at least part of said distal portion is constructed such that following radial expansion of the balloon to a first expanded state, said distal conduit portion is capable of responding to further expansion of the balloon to a second expanded state by increasing its length from a resting value, and of responding to subsequent partial deflation back to said first expanded state by reducing its length back to said resting value.
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16. A method for treating vascular occlusions in a patient in need of such treatment, comprising the steps of:
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a) bringing a balloon into proximity with a vascular occlusion within a blood vessel to be treated;
b) causing said balloon to be cyclically inflated and partially deflated such that an element attached to said balloon is caused to oscillate along a distal-proximal axis in close proximity to the vascular occlusion, thereby causing complete or partial fracture of said occlusion. - View Dependent Claims (17, 20, 21, 39)
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22. A balloon catheter comprising:
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an inner shaft disposed within an outer shaft such that the distal end of the inner shaft extends beyond the distal end of the outer shaft, wherein the lumen of said inner shaft is suitable for allowing the passage of a guidewire through all or part of its length;
a balloon attached at its proximal end to said outer shaft and at its distal end to said inner shaft; and
means for the introduction of an expansion fluid into the annular space formed between the inner surface of the outer shaft and the outer surface of the inner shaft and therefrom into the lumen of said balloon, and for the removal thereof;
wherein the inner shaft is constructed such that following radial expansion of the balloon to a first expanded state, a portion of said inner shaft is capable of responding to further longitudinal expansion of the balloon to a second expanded state by reducing its inner diameter thereby being able to grasp a guidewire placed within the lumen of said inner shaft, thereby preventing movement of said guidewire relative to said inner shaft, and such that said inner shaft is capable of responding to further expansion of the balloon from said second expanded state to a third expanded state by increasing its length from a resting value, and of responding to subsequent partial deflation back to said second expanded state by reducing its length back to said resting value. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A balloon catheter comprising a conduit having proximal and distal portions,
wherein said proximal portion contains two separate lumens, one of said lumens being suitable for allowing the passage of a guidewire therethrough, the other lumen being suitable for allowing passage of a fluid, wherein said distal portion contains a single lumen, said lumen being the continuation of the guidewire lumen, wherein a balloon is attached at its proximal end to said proximal conduit portion and at its distal end to said distal conduit portion; -
and wherein the distal portion of the conduit is constructed such that following radial expansion of the balloon to a first expanded state, a portion of said distal conduit portion is capable of responding to further longitudinal expansion of the balloon to a second expanded state by reducing its inner diameter thereby being able to grasp a guidewire placed within the lumen of said distal conduit portion, thereby preventing movement of said guidewire relative to said inner shaft, and such that said distal conduit portion is capable of responding to further expansion of the balloon from said second expanded state to a third expanded state by increasing its length from a resting value, and of responding to subsequent partial deflation back to said second expanded state by reducing its length back to said resting value. - View Dependent Claims (35, 38)
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36. A balloon catheter comprising a conduit having a proximal portion, a middle portion and a distal portion,
wherein said proximal portion contains two separate lumens, one of said lumens being suitable for allowing the passage of a guidewire therethrough, the other lumen being suitable for allowing passage of a fluid, wherein said middle portion contains two concentrically arranged conduits, the lumen of the outer conduit being in fluid communication with the fluid passage lumen of said proximal portion, the lumen of the inner conduit being in fluid communication with the guidewire lumen of said proximal portion, wherein said distal portion is a single-lumen conduit that is in fluid communication with the inner lumen of said middle portion, wherein a balloon is attached at its proximal end to the outer surface of said middle portion and at its distal end to said distal portion; -
and wherein at least part of the distal portion is constructed such that following radial expansion of the balloon to a first expanded state, said distal portion conduit is capable of responding to further expansion of the balloon to a second expanded state by reducing its inner diameter thereby being able to grasp a guidewire placed within the lumen of said distal conduit portion, thereby preventing movement of said guidewire relative to said inner shaft, and such that said middle portion inner conduit is capable of responding to further expansion of the balloon from said second expanded state to a third expanded state by increasing its length from a resting value, and of responding to subsequent partial deflation back to said second expanded state by reducing its length back to said resting value. - View Dependent Claims (37)
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Specification