Embolectomy Catheters And Methods For Treating Stroke And Other Small Vessel Thromboembolic Disorders
First Claim
1. A method for removing obstructive matter from a vessel of a patient comprising:
- advancing a distal end of a guidewire toward obstructive matter within said vessel;
advancing an embolectomy catheter over said guidewire;
advancing a distal end of said embolectomy catheter through said obstructive matter;
expanding an obstructive matter capturing receptacle on said distal end of said embolectomy catheter; and
retracting said embolectomy catheter so as to capture said obstructive matter within said obstructive matter capturing receptacle.
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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.
130 Citations
20 Claims
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1. A method for removing obstructive matter from a vessel of a patient comprising:
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advancing a distal end of a guidewire toward obstructive matter within said vessel;
advancing an embolectomy catheter over said guidewire;
advancing a distal end of said embolectomy catheter through said obstructive matter;
expanding an obstructive matter capturing receptacle on said distal end of said embolectomy catheter; and
retracting said embolectomy catheter so as to capture said obstructive matter within said obstructive matter capturing receptacle. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of removing an obstruction within a vessel comprising:
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inserting a guidewire into said vessel of a patient;
advancing said guidewire toward said obstruction;
advancing a catheter over said guidewire until an obstruction removal device of said catheter has at least partially passed through said obstruction;
deploying said obstruction removal device from an unexpanded state to an expanded state;
retracting said catheter; and
capturing said obstruction with said removal device. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method of clearing a vessel obstruction within a patient comprising:
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positioning a guidewire within said vessel;
advancing a distal end of said guidewire toward said obstruction;
sliding an obstruction removal device over said guidewire;
penetrating said obstruction with a distal end of said obstruction removal device;
deploying a capture device from said obstruction removal device, distally of said obstruction;
retracting said obstruction removal device to capture said obstruction in said capture device. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification