Method and apparatus for treatment of intracranial hemorrhages
First Claim
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1. An ultrasound catheter for treatment of a blood clot resulting from an intracranial hemorrhage comprising:
- an elongate tubular body having a distal portion and a proximal portion, the elongate tubular body comprising an inner surface defining a lumen and an outer surface;
a plurality of ultrasound radiating elements positioned in the distal portion of the elongate tubular body between the inner and outer surfaces of the tubular body;
a surface configured to form an electrical connection on the proximal portion of the tubular body comprising annular rings in electrical connection with the plurality of radiating elements and a proximal port located on the proximal portion of the tubular body, the proximal port adjacent and distal to the electrical connection,wherein the lumen includes a plurality of ports on the distal portion of the elongate tubular body configured to allow fluid to flow therethrough, wherein the proximal port opens on an outer surface of the elongate tubular body and is perpendicular to a longitudinal axis of the elongate tubular body; and
a stylet configured to be received within the lumen.
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Abstract
An ultrasound catheter with a lumen for fluid delivery and fluid evacuation, and an ultrasound source is used for the treatment of intracerebral or intraventricular hemorrhages. After the catheter is inserted into a blood clot, a lytic drug can be delivered to the blood clot via the lumen while applying ultrasonic energy to the treatment site. As the blood clot is dissolved, the liquefied blood clot can be removed by evacuation through the lumen.
380 Citations
22 Claims
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1. An ultrasound catheter for treatment of a blood clot resulting from an intracranial hemorrhage comprising:
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an elongate tubular body having a distal portion and a proximal portion, the elongate tubular body comprising an inner surface defining a lumen and an outer surface; a plurality of ultrasound radiating elements positioned in the distal portion of the elongate tubular body between the inner and outer surfaces of the tubular body; a surface configured to form an electrical connection on the proximal portion of the tubular body comprising annular rings in electrical connection with the plurality of radiating elements and a proximal port located on the proximal portion of the tubular body, the proximal port adjacent and distal to the electrical connection, wherein the lumen includes a plurality of ports on the distal portion of the elongate tubular body configured to allow fluid to flow therethrough, wherein the proximal port opens on an outer surface of the elongate tubular body and is perpendicular to a longitudinal axis of the elongate tubular body; and a stylet configured to be received within the lumen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 18, 19, 20, 21, 22)
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15. An ultrasound catheter comprising:
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an elongate tubular body having a distal portion and a proximal portion, the elongate tubular body comprising walls defining a first drainage lumen within the elongate tubular body and a delivery lumen within the elongate tubular body; wherein the elongate tubular body does not have sufficient hoop strength, kink resistance, rigidity, and structural support to be pushed through an opening in a skull and into brain tissue; wherein the drainage lumen includes a plurality of drainage ports on the distal portion of the elongate tubular body configured to allow fluid to flow therethrough; wherein the delivery lumen includes a plurality of delivery ports on the distal portion of the elongate tubular body configured to allow fluid to flow therethrough; a plurality of ultrasound radiating elements positioned within, the walls of the elongate tubular body, wherein the ultrasound radiating elements are piezoelectric ceramic oscillators; a surface configured to form an electrical connection on the proximal portion of the elongate tubular body and a proximal port located adjacent and distal to the electrical connection, wherein the proximal port opens on an outer surface of the elongate tubular body in the proximal portion, wherein the proximal port is perpendicular to a longitudinal axis of the elongate tubular body; and a stylet configured to be received within the drainage lumen. - View Dependent Claims (16, 17)
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Specification