Balloon angioplasty device
First Claim
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1. A balloon angioplasty device for widening a path through which blood flows in an artery having plaque deposited on an inner wall thereof, the device having a catheter with a longitudinal axis and comprising:
- an antenna for radiating an electric field having a component in a direction which is tangential to a boundary between said plaque and said inner wall of said artery;
a balloon coupled to the catheter, said balloon having first and second opposing surfaces, wherein said balloon is disposed about said antenna; and
a mode filter comprising at least one conductive strip disposed circumferentially around said balloon and concentrically about said longitudinal axis of said catheter for minimizing said electric field component radiated by said antenna in a direction which is tangential to said boundary between the plaque and the artery wall on which the plaque is deposited.
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Abstract
A balloon angioplasty device includes a microwave antenna, a catheter and a transmission line disposed through the catheter and coupled to the antenna. The device further includes a balloon coupled to the catheter and a mode filter disposed about the antenna.
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Citations
20 Claims
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1. A balloon angioplasty device for widening a path through which blood flows in an artery having plaque deposited on an inner wall thereof, the device having a catheter with a longitudinal axis and comprising:
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an antenna for radiating an electric field having a component in a direction which is tangential to a boundary between said plaque and said inner wall of said artery; a balloon coupled to the catheter, said balloon having first and second opposing surfaces, wherein said balloon is disposed about said antenna; and a mode filter comprising at least one conductive strip disposed circumferentially around said balloon and concentrically about said longitudinal axis of said catheter for minimizing said electric field component radiated by said antenna in a direction which is tangential to said boundary between the plaque and the artery wall on which the plaque is deposited. - View Dependent Claims (2, 3, 4, 5)
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6. A catheter for widening a path through which blood flows in an artery having plaque deposited on an inner wall thereof, the catheter comprising:
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a catheter body having a longitudinal axis; a coaxial cable disposed along said longitudinal axis of said catheter body; an antenna coupled to a first end of said coaxial cable for radiating an electric field having a component in a direction which is tangential to a boundary between said plaque and said inner wall of said artery; an inflatable member having an inner surface, an outer surface, an open end and a closed end, wherein said inflatable member is disposed about said antenna and the open end of said member is coupled to said catheter body; and a conductive strip disposed circumferentially around said inflatable member and concentrically about said longitudinal axis of said catheter body on a first one of the inner and outer surfaces of said inflatable member to attenuate said electric field component radiated by said antenna in a direction which is tangential to said boundary between the plaque and said inner wall of said artery. - View Dependent Claims (7, 8, 9, 10)
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11. A heating device, adapted for use with balloon angioplasty techniques for widening a path through which blood flows in an artery having plaque deposited on an inner wall thereof, said device comprising:
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a dilation catheter having a longitudinal axis and including a balloon; a transmission line having at least a portion thereof disposed in said catheter; an antenna coupled to said transmission line and disposed in the balloon, said antenna radiating an electric field having a component in a direction which is tangential to a boundary between said plaque and said inner wall of said artery; and a mode filter comprising at least one conductive strip disposed circumferentially about said antenna and concentrically about said longitudinal axis of said catheter for minimizing said component of said electric field radiated by said antenna in a direction which is tangential to said boundary between the plaque and said inner wall of said artery. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A balloon angioplasty device comprising:
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a catheter having a longitudinal axis and a channel therein; an antenna coupled to said catheter for radiating an electric field having a circumferentially radiated component; a balloon having first and second opposing surfaces, wherein said balloon is coupled to said catheter; a perfluorocarbon fluid disposed in said balloon such that said perfluorocarbon fluid inflates said balloon and wherein said perfluorocarbon fluid is fed into said balloon through the channel in said catheter; and a mode filter comprising at least one conductive strip disposed circumferentially about said balloon and concentrically about said longitudinal axis of said catheter for minimizing said circumferentially directed electric field component radiated by said antenna. - View Dependent Claims (20)
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Specification