Embolic protection device
First Claim
1. An embolic protection device comprising:
- a support element for delivery through a vascular system of a patient;
a self-expanding foam filter element associated with the support element, the foam filter element being movable between a collapsed stored position for movement through the vascular system and an expanded position for occluding a blood vessel such that blood passing through the blood vessel is delivered through the foam filter element but embolic material in the blood is retained in the foam filter element;
the foam filter element comprising an open cell structure, the open cell structure comprising pores that provide at least one path for blood to flow from a proximal end of the filter to a distal end of the filter but restricts the embolic material from passing through,wherein the foam filter element further comprises at least one channel, each channel defining a pathway extending from the proximal end of the filter to the distal end of the filter for blood to flow through.
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Accused Products
Abstract
An embolic protection device has a collapsible filter element mounted on a carrier such as a guidewire. The filter element collapses into an outer end of a catheter for deployment and retrieval through a vascular system of a patient. The filter element has a collapsible filter body with a proximal inlet end and a distal outlet end. The proximal inlet end has inlet openings sized to allow blood and embolic material enter the filter body. The outlet end has outlet openings which allow through passage of blood but retain embolic material within the filter body. After use, the catheter is movable along the guidewire to engage the proximal end of the filter element and close the inlet openings before sliding over the filter element from the proximal end to the distal end to progressively collapse the filter body on the guidewire for retrieval.
465 Citations
23 Claims
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1. An embolic protection device comprising:
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a support element for delivery through a vascular system of a patient; a self-expanding foam filter element associated with the support element, the foam filter element being movable between a collapsed stored position for movement through the vascular system and an expanded position for occluding a blood vessel such that blood passing through the blood vessel is delivered through the foam filter element but embolic material in the blood is retained in the foam filter element; the foam filter element comprising an open cell structure, the open cell structure comprising pores that provide at least one path for blood to flow from a proximal end of the filter to a distal end of the filter but restricts the embolic material from passing through, wherein the foam filter element further comprises at least one channel, each channel defining a pathway extending from the proximal end of the filter to the distal end of the filter for blood to flow through. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for providing embolic protection, comprising:
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advancing an embolic protection device through a vascular system of a patient, the embolic protection device comprising a support element and a self-expanding foam filter element associated with the support element, the foam filter element being movable between a collapsed stored position for movement through the vascular system and an expanded position for occluding a blood vessel such that blood passing through the blood vessel is delivered through the foam filter element but embolic material is retained in the foam filter element;
the foam filter element comprising an open cell structure, the open cell structure comprising pores that provide at least one path for blood to flow from a proximal end of the filter to a distal end of the filter but restricts the embolic material from passing through;
wherein the foam filter element further comprises at least one channel, each channel defining a pathway extending from the proximal end of the filter to the distal end of the filter for blood to flow through; andengaging the foam filter element with a wall of the blood vessel. - View Dependent Claims (14, 15)
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16. A method of making an embolic protection device comprising a support element for delivery through a vascular system of a patient;
- a self-expanding foam filter element associated with the support element, the foam filter element being movable between a collapsed stored position for movement through the vascular system and an expanded position for occluding a blood vessel such that blood passing through the blood vessel is delivered through the foam filter element but embolic material in the blood is retained in the foam filter element, the foam filter element comprising an open cell structure, the open cell structure comprising pores that provide at least one path for blood to flow from a proximal end of the filter to a distal end of the filter but restricts the embolic material from passing through
the method comprising; removing material from the foam filter element to create at least one channel, each channel defining a pathway extending from a proximal end of the filter to a distal end of the filter for blood to flow through. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
- a self-expanding foam filter element associated with the support element, the foam filter element being movable between a collapsed stored position for movement through the vascular system and an expanded position for occluding a blood vessel such that blood passing through the blood vessel is delivered through the foam filter element but embolic material in the blood is retained in the foam filter element, the foam filter element comprising an open cell structure, the open cell structure comprising pores that provide at least one path for blood to flow from a proximal end of the filter to a distal end of the filter but restricts the embolic material from passing through
Specification