Therapeutic ultrasound system
First Claim
Patent Images
1. An ultrasound catheter comprising:
- an elongate flexible catheter body having a proximal end, a distal end, and a main lumen extending longitudinally therethrough;
an ultrasound transmission member extending longitudinally through the main lumen of the catheter body, the ultrasound transmission member having a distal end positioned at the distal end of the catheter body; and
a guidewire lumen extending longitudinally through a portion of the main lumen and terminating in a guidewire port that is closer to the proximal end of the catheter body than to the distal end of the catheter body.
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Abstract
An ultrasound system has a catheter including an elongate flexible catheter body having a main lumen extending longitudinally therethrough. The catheter further includes an ultrasound transmission member extending longitudinally through the main lumen of the catheter body, the ultrasound transmission member having a proximal end connectable to an ultrasound generating device and a distal end coupled to the distal end of the catheter body.
133 Citations
47 Claims
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1. An ultrasound catheter comprising:
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an elongate flexible catheter body having a proximal end, a distal end, and a main lumen extending longitudinally therethrough;
an ultrasound transmission member extending longitudinally through the main lumen of the catheter body, the ultrasound transmission member having a distal end positioned at the distal end of the catheter body; and
a guidewire lumen extending longitudinally through a portion of the main lumen and terminating in a guidewire port that is closer to the proximal end of the catheter body than to the distal end of the catheter body. - View Dependent Claims (2)
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3. An ultrasound catheter comprising:
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an elongate flexible catheter body having a proximal end, a distal end, and at least one lumen extending longitudinally therethrough;
a distal head positioned on the distal end of the catheter body, the distal head made from low-density material that is rigid and radio-dense; and
an ultrasound transmission member extending longitudinally through the at least one lumen of the catheter body, the ultrasound transmission member having a distal end connected to the distal head. - View Dependent Claims (4, 5, 6, 7, 8, 9)
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10. An ultrasound catheter comprising:
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an elongate flexible catheter body having a proximal end, a distal end, and a main lumen extending longitudinally therethrough;
an ultrasound transmission member extending longitudinally through the main lumen of the catheter body, the ultrasound transmission member having a distal end positioned at the distal end of the catheter body; and
a guidewire lumen extending longitudinally through a portion of the main lumen and positioned at about the center of the main lumen. - View Dependent Claims (11, 12, 13)
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14. An ultrasound catheter comprising:
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an elongate flexible catheter body having a proximal end, a distal head, and a main lumen extending longitudinally therethrough, the distal head having a bore with a proximal section and a distal section that has an inner diameter that is smaller than the inner diameter of the proximal section of the bore;
an ultrasound transmission member extending longitudinally through the main lumen of the catheter body, the ultrasound transmission member having a proximal end and a distal end positioned at the distal head of the catheter body; and
a guidewire lumen extending longitudinally through a portion of the main lumen, and into the proximal section of the bore of the distal head, the guidewire lumen terminating before the distal section of the bore of the distal head. - View Dependent Claims (15, 16, 17)
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18. A method of removing particles from a blood vessel, comprising:
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percutaneously introducing an ultrasound catheter into the blood vessel, the catheter having a proximal end, a distal tip, a lumen extending longitudinally therethrough, and an ultrasound transmission member extending longitudinally through the lumen;
positioning the distal tip of the catheter at a desired treatment location in the blood vessel;
introducing a flow of fluid along the outside of the catheter to the desired treatment location;
initiating ultrasound ablation at the desired treatment location which results in the generation of tissue particles; and
carrying the tissue particles with the fluid through the lumen of the catheter from the distal tip to the proximal end to be removed outside the blood vessel, and to simultaneously cool the ultrasound transmission member.
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19. A method of locally imaging a treatment location during a medical procedure, comprising:
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a. percutaneously introducing an ultrasound catheter into the blood vessel, the catheter having a proximal end, a distal tip, a lumen extending longitudinally therethrough, and an ultrasound transmission member extending longitudinally through the lumen;
b. positioning the distal tip of the catheter at a desired treatment location in the blood vessel that has a lesion;
c. initiating ultrasound ablation at the desired treatment location;
d. injecting contrast media through the lumen of the catheter and out of the distal tip thereof. - View Dependent Claims (20, 21, 22)
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23. A method of shaping the distal end of a catheter, comprising:
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maintaining the distal end of the catheter in a bent configuration over a heat source for a period of time; and
cooling the distal end. - View Dependent Claims (24, 25, 26, 27, 28)
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29. An ultrasound catheter comprising:
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an elongate flexible catheter body having a proximal end, a distal end, and at least one lumen extending longitudinally therethrough;
an ultrasound transmission member extending longitudinally through the at least one lumen of the catheter body, the ultrasound transmission member having a proximal end and a distal end positioned at the distal end of the catheter body; and
a sonic connector positioned at the proximal end of the catheter body for connecting the proximal end of the ultrasound transmission member to an ultrasound generating device at a location where there is maximum longitudinal displacement of the ultrasound generating device. - View Dependent Claims (30, 31, 32, 33, 34, 35)
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36. An ultrasound catheter comprising:
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an elongate flexible catheter body having a proximal end, a distal end, and at least one lumen extending longitudinally therethrough;
an ultrasound transmission member extending longitudinally through the at least one lumen of the catheter body, the ultrasound transmission member having a proximal end attached to sonic connector, and a distal end attached to the distal end of the catheter body; and
a sonic connector for connecting the ultrasound transmission member to an ultrasound generating device, the sonic connector having;
a distal bore to which the ultrasound transmission member is attached;
a central portion having a flat proximal face;
a threaded portion extending and spaced-apart from the flat proximal face, the threaded portion attached to the ultrasound generating device. - View Dependent Claims (37)
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38. A connector for connecting an ultrasound transducer to an ultrasound catheter, comprising:
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a catheter knob;
an ultrasound transducer having a transducer housing, the transducer housing having a catheter coupling that includes a sleeve;
an annular collar coupled to the transducer housing and the sleeve for supporting a connection between the transducer and the catheter knob, wherein the collar is slideably movable between;
(i) a first non-supporting position wherein the collar is not positioned around the sleeve, and (ii) a second supporting position, wherein the collar is positioned around a portion of the sleeve. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45)
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46. A method of cooling the ultrasound transmission member during a medical procedure, comprising:
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a. percutaneously introducing an ultrasound catheter into the blood vessel, the catheter having a proximal end, a distal tip, a lumen extending longitudinally therethrough, and an ultrasound transmission member extending longitudinally through the lumen;
b. positioning the distal tip of the catheter at a desired treatment location in the blood vessel that has a lesion;
c. initiating irrigation flow of a coolant through the lumen of the catheter;
d. initiating ultrasound ablation at the desired treatment location;
e. maintaining irrigation flow rate and pressure so that the temperature of the coolant. at the distal tip does not exceed 50 degrees Celsius.
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47. A method of cooling the ultrasound transmission member during a medical procedure, comprising:
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a. percutaneously introducing an ultrasound catheter into the blood vessel, the catheter having a proximal end, a distal tip, a lumen extending longitudinally therethrough, and an ultrasound transmission member extending longitudinally through the lumen;
b. positioning the distal tip of the catheter at a desired treatment location in the blood vessel that has a lesion;
c initiating negative pressure to facilitate irrigation flow of a coolant through the lumen of the catheter from outside of the distal tip adjacent the lesion to a location outside and proximal of the catheter;
e. maintaining irrigation flow rate and negative pressure so that the temperature of the coolant at the distal tip will not exceed 50 degrees Celsius.
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Specification