Devices and methods for removal of acute blockages from blood vessels
First Claim
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1. A system for treating an occlusion in a vessel the system comprising:
- a guide catheter comprising a proximal end, a distal end and a lumen extending between the proximal end and the distal end, the lumen of the guide catheter further comprising a proximal segment and a distal segment;
an aspiration catheter disposed in and advanceable through the guide catheter, the aspiration catheter comprising a distal end and a proximal end, a distal segment and a proximal segment, and a lumen, said lumen of the aspiration catheter extending proximal of the distal end and terminating at a transfer port at the proximal end of the aspiration catheter;
a microcatheter advanceable through the guide catheter and the aspiration catheter, the microcatheter capable of being retracted proximal of the transfer port;
the guide catheter being configured to facilitate aspiration through the microcatheter and the lumen, and the transfer port of the aspiration catheter;
the transfer port being configured to transmit aspiration in the proximal segment of the lumen of the aspiration catheter into the lumen of the distal segment of the guide catheter and the distal end of the aspiration catheter being configured to receive the occlusion into at least a portion of the lumen of the aspiration catheter a flow restrictor between the guide catheter and the distal segment of the aspiration catheter, distal of the transfer port,wherein the flow restrictor is located on an inner surface of the guide catheter, andwherein the transfer port is connected to the guide catheter through a minimal frictional engagement.
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Abstract
A rapid exchange (RX) catheter may provide a proximal seal against a guide catheter inner lumen so that aspiration may be applied through a guide catheter. The catheter may include an exit port that defines a transfer port for aspiration and may enable minimal frictional engagement with the guide catheter proximal of the exit port. Aspiration can be applied to the lumen of the guide catheter and may be directed to and effective at the tip of the RX aspiration catheter. A tip of the RX catheter may facilitate aspiration and retrieval of the clot by expanding under load and can also partially or fully occlude the vessel.
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Citations
17 Claims
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1. A system for treating an occlusion in a vessel the system comprising:
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a guide catheter comprising a proximal end, a distal end and a lumen extending between the proximal end and the distal end, the lumen of the guide catheter further comprising a proximal segment and a distal segment; an aspiration catheter disposed in and advanceable through the guide catheter, the aspiration catheter comprising a distal end and a proximal end, a distal segment and a proximal segment, and a lumen, said lumen of the aspiration catheter extending proximal of the distal end and terminating at a transfer port at the proximal end of the aspiration catheter; a microcatheter advanceable through the guide catheter and the aspiration catheter, the microcatheter capable of being retracted proximal of the transfer port; the guide catheter being configured to facilitate aspiration through the microcatheter and the lumen, and the transfer port of the aspiration catheter; the transfer port being configured to transmit aspiration in the proximal segment of the lumen of the aspiration catheter into the lumen of the distal segment of the guide catheter and the distal end of the aspiration catheter being configured to receive the occlusion into at least a portion of the lumen of the aspiration catheter a flow restrictor between the guide catheter and the distal segment of the aspiration catheter, distal of the transfer port, wherein the flow restrictor is located on an inner surface of the guide catheter, and wherein the transfer port is connected to the guide catheter through a minimal frictional engagement. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification