Thrombus retrieval device
First Claim
Patent Images
1. A device for the retrieval of a thrombus from a blood vessel, the device comprising:
- a delivery tube with a plurality of side holes oriented radially, the delivery tube being insertable into a blood vessel containing a thrombus; and
one or more thrombus engaging elements for each side hole, each thrombus engaging element comprising a wire and being movable radially of the delivery tube between a retracted configuration in which it is retained within the delivery tube and a deployed configuration in which it projects from the delivery tube through the side hole, wherein each wire has a free end being movable radially of the delivery tube between the retracted and deployed configurations and is configured for piercing a thrombus, wherein a portion of each wire has a semi-circular shape in a radial plane of the delivery tube after deployment and extends from the side hole to the free end in the same circumferential direction as each other one of the thrombus engaging elements.
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Abstract
A thrombus retrieval device has one or more thrombus engaging elements that are movable between a retracted configuration in which they are stowed within the device and a deployed configuration in which they project from the device to snare an adjacent thrombus for removal from a blood vessel.
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Citations
16 Claims
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1. A device for the retrieval of a thrombus from a blood vessel, the device comprising:
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a delivery tube with a plurality of side holes oriented radially, the delivery tube being insertable into a blood vessel containing a thrombus; and one or more thrombus engaging elements for each side hole, each thrombus engaging element comprising a wire and being movable radially of the delivery tube between a retracted configuration in which it is retained within the delivery tube and a deployed configuration in which it projects from the delivery tube through the side hole, wherein each wire has a free end being movable radially of the delivery tube between the retracted and deployed configurations and is configured for piercing a thrombus, wherein a portion of each wire has a semi-circular shape in a radial plane of the delivery tube after deployment and extends from the side hole to the free end in the same circumferential direction as each other one of the thrombus engaging elements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A device for the retrieval of a thrombus from a blood vessel, the device comprising:
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a delivery tube with at least two side holes oriented radially, the delivery tube being insertable into a blood vessel containing a thrombus; and one or more thrombus engaging elements for each side hole, each thrombus engaging element comprising a wire configured to pierce a thrombus and being movable radially of the delivery tube between a retracted configuration in which it is retained within the delivery tube and a deployed configuration in which it projects from the delivery tube through the side hole, wherein each thrombus engaging element is configured to curl in a radial plane of the delivery tube after deployment through the side hole, wherein all of the thrombus engaging elements curl in a clockwise direction or all of the thrombus engaging elements curl in a counterclockwise direction. - View Dependent Claims (12)
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13. A device for the retrieval of a thrombus from a blood vessel, the device comprising:
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a delivery tube with at least two side holes oriented radially, the delivery tube being insertable into a blood vessel containing a thrombus; and one or more thrombus engaging elements for each side hole, each thrombus engaging element being movable radially of the delivery tube between a retracted configuration in which it is retained within the delivery tube and a deployed configuration configured for piercing thrombi with a free end, in which it projects in a radial plane and extends from the delivery tube through the side hole to the free end in the same circumferential direction as each other one of the thrombus engaging elements, the device further comprising a positioning apparatus configured in use operable to push the delivery tube against a wall of the vessel, wherein the delivery tube further comprises a positioning hole and the positioning apparatus comprises a deployable positioning wire movable between a retracted configuration in which it is retained in the delivery tube and a positioning configuration in which it projects from the delivery tube through the positioning hole so as to push the delivery tube against a wall of the vessel. - View Dependent Claims (14)
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15. A device for the retrieval of a thrombus from a blood vessel, the device comprising:
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a delivery tube with a plurality of side holes oriented radially, the delivery tube being insertable into a blood vessel containing a thrombus; and one or more thrombus engaging elements for each side hole, each thrombus engaging element being movable radially of the delivery tube between a retracted configuration in which it is retained within the delivery tube and a deployed configuration in which it projects with a free end from the delivery tube through the side hole and curls in a radial plane from the side hole to the free end in the same circumferential direction as each other one of the thrombus engaging elements, wherein the one or more thrombus engaging elements have cross-sections with one or more flat sides arranged so that, when the device is in the deployed configuration and is being retracted from the vessel in a direction transverse to a direction in which each thrombus engaging element projects, contact between the one or more flat sides and a wall of the vessel acts to push the contacted thrombus engaging element away from the vessel wall.
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16. A device for the retrieval of a thrombus from a blood vessel, the device comprising:
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a delivery tube with at least two side holes oriented radially, the delivery tube being insertable into a blood vessel containing a thrombus; and one or more thrombus engaging elements for each side hole, each thrombus engaging element comprising a wire with a free distal end and being movable radially of the delivery tube between a retracted configuration in which it is retained within the delivery tube and a deployed configuration in which the free distal end projects from the delivery tube through the side hole, wherein the one or more thrombus engaging elements are curled with a curvature that, during movement into the deployed configuration, causes the free distal end to enter into the one or more holes in the delivery tube, leaving only intermediate portions of the one or more thrombus engaging elements project from the one or more side holes wherein all of the thrombus engaging elements curl in a clockwise direction or all of the thrombus engaging elements curl in a counterclockwise direction from the side holes to the free distal ends.
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Specification