Catheter having nonlinear flow portion
First Claim
1. An intravascular catheter comprising an elongated tube having a proximal portion and a distal portion, an outside diameter, a balloon mounted on the distal portion of the elongated tube, and at least one lumen having a plurality of flow cross-sectional areas forming a longitudinal length and communicating with the balloon wherein the flow cross-sectional areas change in area at a nonuniform rate per unit of longitudinal length over at least a portion of the lumen;
- wherein the flow cross-sectional area decreases at least 50% in area within about the first 25% of the lumen longitudinal length measured from the proximal end.
4 Assignments
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Accused Products
Abstract
An improved catheter having at least one lumen with a nonlinear inflation lumen flow portion that may be used with a balloon or in a guide catheter. Additionally disclosed is a catheter assembly having a nonlinear flow portion for contrast media delivery. The nonlinear flow portions facilitate hydraulic and mechanical characteristics relating to deflation of a balloon, the flow rate of fluid, contrast media or the like, and relative performance.
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Citations
23 Claims
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1. An intravascular catheter comprising an elongated tube having a proximal portion and a distal portion, an outside diameter, a balloon mounted on the distal portion of the elongated tube, and at least one lumen having a plurality of flow cross-sectional areas forming a longitudinal length and communicating with the balloon wherein the flow cross-sectional areas change in area at a nonuniform rate per unit of longitudinal length over at least a portion of the lumen;
wherein the flow cross-sectional area decreases at least 50% in area within about the first 25% of the lumen longitudinal length measured from the proximal end. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An intravascular catheter comprising an elongated tube having a proximal portion and a distal portion, an outside diameter, a balloon mounted on the distal portion of the elongated tube, and at least one lumen having a plurality of flow cross-sectional areas forming a longitudinal length and communicating with the balloon wherein the flow cross-sectional areas change in area at a nonuniform rate per unit of longitudinal length over at least a portion of the lumen;
wherein an angle formed by an imaginary line drawn between a proximal most nonlinear flow portion outside surface point and a distal most nonlinear flow portion outside surface point and the catheter longitudinal axis is between about 1 degree and about 0.01 degree. - View Dependent Claims (13)
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14. An intravascular catheter comprising an elongated tube having a proximal portion and a distal portion, an outside diameter, a balloon mounted on the distal portion of the elongated tube, and at least one lumen having a plurality of flow cross-sectional areas forming a longitudinal length and communicating with the balloon wherein the flow cross-sectional areas change in area at a nonuniform rate per unit of longitudinal length over at least a portion of the lumen;
wherein the flow cross-sectional area ends decreasing in area between about 10% and about 60% of the lumen longitudinal length measured from the proximal end.
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15. An intravascular catheter comprising an elongated tube having a proximal portion and a distal portion, an outside diameter, a balloon mounted on the distal portion of the elongated tube, and at least one lumen having a plurality of flow cross-sectional areas forming a longitudinal length and communicating with the balloon wherein the flow cross-sectional areas change in area at a nonuniform rate per unit of longitudinal length over at least a portion of the lumen;
wherein the flow cross-sectional area decreases at least 20% in area distally along the longitudinal length of the elongated tube.
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16. An intravascular catheter assembly comprising:
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(a) a first elongated tube having at least one lumen with a plurality of first flow cross-sectional areas forming a longitudinal length, an outside diameter, a proximal end, a distal portion, a balloon mounted on the distal portion which communicates with the lumen, and an outside surface wherein the first flow cross-sectional areas change at a nonuniform rate per unit of axial length over at least a portion of the lumen; (b) the outside diameter changing at a nonuniform rate per unit of longitudinal length over at least a portion of the first elongated tube; and (c) a second elongated tube having a longitudinal length, at least one lumen, and an inside surface; wherein the first elongated tube is disposed at least partially in the second elongated tube lumen forming a plurality of second flow cross-sectional areas between the first elongated tube outside surface and the second elongated tube inside surface; and wherein the second flow cross-sectional area ends increasing in area between about 10% and about 60% of the longitudinal length of the catheter assembly measured from the proximal end. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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23. An intravascular catheter assembly comprising:
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(a) a first elongated tube having at least one lumen with a plurality of first flow cross-sectional areas forming a longitudinal length, an outside diameter, a proximal end, a distal portion, a balloon mounted on the distal portion which communicates with the lumen, and an outside surface wherein the first flow cross-sectional are areas change at a nonuniform rate nonuniform rate per unit of axial length over at least a portion of the lumen; (b) the outside diameter changing at a nonuniform rate per unit of longitudinal length over at least a portion of the first elongated tube; and (c) a second elongated tube having a longitudinal length, at least one lumen, and an inside surface; wherein the first elongated tube is disposed at least partially in the second elongated tube lumen forming a plurality of second flow cross-sectional areas between the first elongated tube outside surface and the second elongated tube inside surface; and wherein the second flow cross-sectional area increases at least 20% along the longitudinal length of the catheter assembly.
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Specification