Atherectomy catheter and method of forming the same
First Claim
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1. A vascular catheter comprising:
- a substantially transparent flexible tube having at least a first lumen and a second lumen extending from a proximal end to a distal end thereof;
a flexible torque member extending within a proximal portion of a first of the lumens, said torque member having an open interior;
a housing disposed within the distal end of the first lumen and joined to the flexible torque member;
means for removing atheroma within said housing;
wherein the first lumen is constructed about both the flexible torque member and the housing and wherein the second lumen is enlarged at its distal end to form an inflatable balloon adjacent the housing, and wherein the first lumen of the flexible tube extends over the housing at least as far as the balloon extends adjacent the housing.
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Abstract
An atherectomy device includes a transparent lumen for providing inflation medium to an inflatable balloon. A dual lumen flexible tube includes an opaque flexible torque member in a first lumen, while the second lumen serves as an inflation lumen. The distal end of the inflation lumen is expanded to define the balloon, and no seals are needed between the balloon and the inflation lumen.
237 Citations
15 Claims
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1. A vascular catheter comprising:
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a substantially transparent flexible tube having at least a first lumen and a second lumen extending from a proximal end to a distal end thereof; a flexible torque member extending within a proximal portion of a first of the lumens, said torque member having an open interior; a housing disposed within the distal end of the first lumen and joined to the flexible torque member; means for removing atheroma within said housing; wherein the first lumen is constructed about both the flexible torque member and the housing and wherein the second lumen is enlarged at its distal end to form an inflatable balloon adjacent the housing, and wherein the first lumen of the flexible tube extends over the housing at least as far as the balloon extends adjacent the housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for forming a vascular catheter, said method comprising:
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constricting a first lumen of a substantially transparent flexible tube having at least a first and a second lumen about a flexible torque member and a housing joined to a distal end of the flexible torque member; and expanding distal region of the second lumen proximate the housing to form an inflatable balloon. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification