Atherectomy catheter with improved fluid infusion
First Claim
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1. An intravascular catheter comprising:
- (a) an elongated flexible jacket having opposed proximal and distal ends and a central passageway extending between said ends, said jacket including a pair of separable proximal and distal sections releasably coupled to one another;
(b) a working head located at the distal end of the jacket and having a high-speed canalizing tip, capable of removing occlusions from a vessel, the tip being rotatably supported on the working head, said head having a central guide therethrough;
(c) a flexible drive assembly extending through the passageway of the jacket and adapted for rotating the drive cable at high speed, said drive assembly having a disconnectable drive cable;
(d) a releasable coupling to disconnect the working head from the drive cable and,(e) a plurality of infusion ports in the jacket adjacent the distal end, capable of delivering an injectable fluid contrast media at relatively high volumetric flow rates through the passageway into the lumen of a vessel.
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Abstract
According to the invention there is provided an intravascular catheter and thrombectomy procedure utilizing the catheter. The catheter comprises a flexible jacket with a distal working head having a canalizing tip rotatable at high speeds for removing thrombus from the lumen of a vessel. A flexible drive assembly extends through the jacket to rotate the tip and a plurality of infusion ports are formed adjacent the distal end of the jacket, capable of delivering a fluid contrast media at relatively high volumetric flow rates into the lumen of the vessel to locate the site of the thrombus. The canalizing tip is then rotated at high speed to homogenize and remove the thrombus from the lumen.
64 Citations
12 Claims
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1. An intravascular catheter comprising:
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(a) an elongated flexible jacket having opposed proximal and distal ends and a central passageway extending between said ends, said jacket including a pair of separable proximal and distal sections releasably coupled to one another; (b) a working head located at the distal end of the jacket and having a high-speed canalizing tip, capable of removing occlusions from a vessel, the tip being rotatably supported on the working head, said head having a central guide therethrough; (c) a flexible drive assembly extending through the passageway of the jacket and adapted for rotating the drive cable at high speed, said drive assembly having a disconnectable drive cable; (d) a releasable coupling to disconnect the working head from the drive cable and, (e) a plurality of infusion ports in the jacket adjacent the distal end, capable of delivering an injectable fluid contrast media at relatively high volumetric flow rates through the passageway into the lumen of a vessel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An intravascular catheter comprising
(a) an elongated flexible jacket having opposed proximal and distal ends and a central passageway extending between the ends, said jacket including a pair of separable proximal and distal sections releasably coupled to one another; -
(b) a working head located at the distal end of the jacket and having a high speed canalizing tip capable of removing occlusions from the lumen of a vessel, the tip being surrounded by a protective shroud and rotatably supported on the working head, said head having a central guide therethrough; (c) a flexible drive assembly, including an elongated drive cable and a helical bearing surrounding the cable, the drive assembly extending through the passageway of the jacket, with the cable having a distal portion adapted for rotating the tip and a proximal portion coupled to a source of rotational motion, said drive assembly having a disconnectable drive cable; (d) a releasable coupling to disconnect the working head from the drive cable; (e) a drive motor coupled to the proximal portion of the drive cable and capable of rotating the tip at speeds from 0 to 100,000 RPM; (f) means for supplying an injectable radiopaque contrast liquid at relatively high volumetric flow rates into the central passageway, and, (g) a plurality of infusion ports in the jacket adjacent the distal end and in fluid communication with the central passageway, the ports being capable of delivering the supplied liquid contrast media to the lumen at rates in the range of 5 to 60 milliliters per minute. - View Dependent Claims (11, 12)
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Specification