Support frame for an embolic protection device
First Claim
1. An embolic protection filter comprising:
- a filter body having an inlet end and an outlet end, the inlet end of the filter body having one or more inlet openings sized to allow blood and embolic material enter the filter body, the outlet end of the filter body having a plurality of outlet openings sized to allow through passage of blood but to retain undesired embolic material within the filter body; and
a filter support movable between a collapsed position for movement through the vascular system and an extended outwardly projecting position to support the filter body in an expanded position;
wherein in the extended outwardly projecting position, the filter body being configured for circumferential apposition with an interior wall of a vasculature along an apposition path which extends around the full circumference of the filter in a plane substantially perpendicular to the longitudinal axis of the filter, anda portion of the filter support is wrapped with a radiopaque coil.
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Abstract
A support 103 for an embolic protection device comprises round wires 116 which may form one or more support hoops for a filter body. The circumferential hoop formed by the wires 116 ensures that in the expanded position, the filter body 102 will be supported by the support frame 103 in circumferential apposition with the interior wall of the vasculature. The wires 116 may have a strain distributing linkage element in the form of a loop 120. The loop 120 acts as a diameter or circumference adjuster allowing an embolic protection device to adapt to different Bessel contours and sizes whilst maintaining apposition with the vessel wall. The strain relieving geometry of the loops enhances the compliance of the bend points without creating a weakened hinge point, thus ensuring that there is no discontinuity in the circumferential seal against the vessel wall.
456 Citations
15 Claims
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1. An embolic protection filter comprising:
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a filter body having an inlet end and an outlet end, the inlet end of the filter body having one or more inlet openings sized to allow blood and embolic material enter the filter body, the outlet end of the filter body having a plurality of outlet openings sized to allow through passage of blood but to retain undesired embolic material within the filter body; and a filter support movable between a collapsed position for movement through the vascular system and an extended outwardly projecting position to support the filter body in an expanded position; wherein in the extended outwardly projecting position, the filter body being configured for circumferential apposition with an interior wall of a vasculature along an apposition path which extends around the full circumference of the filter in a plane substantially perpendicular to the longitudinal axis of the filter, and a portion of the filter support is wrapped with a radiopaque coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification