Embolectomy catheters and methods for treating stroke and other small vessel thromboembolic disorders
First Claim
1. An embolism capturing system comprising:
- a guide catheter having a proximal obstructive matter retaining member resiliently expandable from a radially compressed configuration to a radially expanded configuration; and
an embolectomy catheter having a matter capturing receptacle resiliently expandable from a radially compressed configuration to a radially expanded configuration;
the embolectomy catheter and matter capturing receptacle advanceable over a guidewire previously passed through a vessel obstruction;
the embolectomy catheter and matter capturing receptacle advanceable through the guide catheter and through the proximal obstructive matter retaining member to the vessel obstruction.
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Accused Products
Abstract
Embolectomy catheters, rapid exchange microcatheters, systems and methods for removing clots or other obstructive matter (e.g., thrombus, thromboemboli, embolic fragments of atherosclerotic plaque, foreign objects, etc.) from blood vessels. This invention is particularly useable for percutaneous removal of thromboemboli or other obstructive matter from small blood vessels of the brain, during an evolving stroke or period of cerebral ischemia. In some embodiments, the embolectomy catheters of this invention are advanceable with or over a guidewire which has been pre-inserted through or around the clot. Also, in some embodiments, the embolectomy catheters include clot removal devices which are deployable from the catheter after the catheter has been advanced at least partially through the clot. The clot removal device may include a deployable wire nest that is designed to prevent a blood clot from passing therethrough. The delivery catheter may include telescoping inner and outer tubes, with the clot removal device being radially constrained by the outer tube. Retraction of the outer tube removes the constraint on the clot removal device and permits it to expand to its deployed configuration. An infusion guidewire is particularly useful in conjunction with the embolectomy catheter, and permits infusion of medicaments or visualization fluids distal to the clot.
226 Citations
19 Claims
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1. An embolism capturing system comprising:
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a guide catheter having a proximal obstructive matter retaining member resiliently expandable from a radially compressed configuration to a radially expanded configuration; and an embolectomy catheter having a matter capturing receptacle resiliently expandable from a radially compressed configuration to a radially expanded configuration; the embolectomy catheter and matter capturing receptacle advanceable over a guidewire previously passed through a vessel obstruction; the embolectomy catheter and matter capturing receptacle advanceable through the guide catheter and through the proximal obstructive matter retaining member to the vessel obstruction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for capturing a clot from a blood vessel, comprising the steps of:
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providing a guide catheter having a proximal obstructive matter retaining member resiliently expandable from a radially compressed configuration to a radially expanded configuration; providing an embolectomy catheter having a matter capturing receptacle biased resiliently expandable from a radially compressed configuration to a radially expanded configuration, the matter capturing receptacle initially disposed in a radially compressed, stowed configuration within an embolectomy catheter; passing a guidewire through the clot; advancing the embolectomy catheter and matter capturing receptacle over the guidewire and through a lumen of the guide catheter and through the obstructive matter retaining member; deploying the matter capturing receptacle to said radially expanded form configuration distally of the guide catheter; deploying the proximal obstructive matter retaining member to said radially expanded configuration; capturing the clot between the matter capturing receptacle and the proximal obstructive matter retaining member; and removing the clot from the blood vessel. - View Dependent Claims (17, 18, 19)
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Specification