Shockwave catheter system with energy control
First Claim
Patent Images
1. A system comprising:
- a catheter including an elongated carrier, a balloon about the carrier in sealed relation thereto, the balloon being arranged to receive a fluid therein that inflates the balloon, and first and second electrodes within the balloon arranged to receive there-across a high electrical voltage pulse at an initial low current, the high electrical voltage pulse causing an electrical arc to form within the balloon, the electrical arc creating a gas bubble within the liquid, a high current to flow through the first and second electrodes, and a mechanical shock wave within the balloon; and
a power source that provides the first and second electrodes with the high electrical voltage pulse at the initial low current, said power source including a sensor for monitoring a parameter that varies during each voltage pulse and wherein the high electrical voltage pulse is terminated when the monitored parameter reaches a predetermined value.
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Abstract
A system that breaks calcium in a liquid includes a catheter including first and second electrodes arranged to receive there-across a high electrical voltage at an initial low current. The high electrical voltage causes an electrical arc to form across the electrodes creating a gas bubble within the liquid, a high current to flow through the electrodes, and a mechanical shock wave. A power source provides the electrodes with the high electrical voltage at the initial current and terminates the high electrical voltage in response to the high current flow through the electrodes.
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Citations
38 Claims
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1. A system comprising:
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a catheter including an elongated carrier, a balloon about the carrier in sealed relation thereto, the balloon being arranged to receive a fluid therein that inflates the balloon, and first and second electrodes within the balloon arranged to receive there-across a high electrical voltage pulse at an initial low current, the high electrical voltage pulse causing an electrical arc to form within the balloon, the electrical arc creating a gas bubble within the liquid, a high current to flow through the first and second electrodes, and a mechanical shock wave within the balloon; and a power source that provides the first and second electrodes with the high electrical voltage pulse at the initial low current, said power source including a sensor for monitoring a parameter that varies during each voltage pulse and wherein the high electrical voltage pulse is terminated when the monitored parameter reaches a predetermined value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A system comprising:
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a catheter including an elongated carrier, the carrier having a guide wire lumen, a balloon having an inner surface about the carrier in sealed relation thereto, the balloon forming with the carrier, a channel arranged to receive a fluid that inflates the balloon, and first and second electrodes, within the balloon between the carrier and the inner surface of the balloon, arranged to receive there-across a high electrical voltage pulse at an initial low current to cause an electrical arc to form within the balloon, the electrical arc creating a gas bubble within the liquid, a high current to flow through the first and second electrodes, and a mechanical shock wave within the balloon; and a power source that provides the first and second electrodes with the high electrical voltage at the initial low current, said power source including a sensor for monitoring a parameter that varies during each voltage pulse and wherein the high electrical voltage pulse is terminated when the monitored parameter reaches a predetermined value. - View Dependent Claims (16)
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17. A method comprising:
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providing a catheter including an elongated carrier, a balloon about the carrier in sealed relation thereto, the balloon being arranged to receive a fluid therein that inflates the balloon, and first and second electrodes within the balloon; introducing the fluid into the balloon to inflate the balloon; applying an electrical voltage pulse across the first and second electrodes to form an electrical arc allowing current to flow across the first and second electrodes; sensing current flow through the first and second electrodes; and terminating the application of the electrical voltage pulse across the first and second electrodes in response to sensed current flow through the first and second electrodes after the electrical arc is formed. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A system that treats obstructions within bodily fluid comprising:
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a catheter including first and second electrodes arranged to receive there-across a high electrical voltage pulse at an initial low current, the high electrical voltage causing an electrical arc to form allowing current to flow across the first and second electrodes within the bodily fluid, the electrical arc creating a gas bubble within the bodily fluid, a high current to flow through the first and second electrodes, and a mechanical shock wave within the bodily fluid; and a power source that provides the first and second electrodes with the high electrical voltage pulse at the initial current, said power source including a sensor for monitoring a parameter that varies during each voltage pulse and wherein the high electrical voltage pulse is terminated when the monitored parameter reaches a predetermined value. - View Dependent Claims (29, 30, 31, 32, 33, 34)
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35. A method of producing a mechanical shcok wave to treat calcified lesion in a human body comprising:
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providing a catheter including first and second electrodes; applying an electrical voltage pulse across the first and second electrodes to form an electrical arc allowing current to flow across the first and second electrodes; sensing current flow through the first and second electrodes; and terminating the application of the electrical voltage pulse across the first and second electrodes in response to sensed current flow through the first and second electrodes after the electrical arc is formed. - View Dependent Claims (36, 37, 38)
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Specification