Embolic filtering devices
First Claim
1. An embolic filtering system used to capture embolic debris in a body vessel, comprising:
- an expandable filter assembly including a self-expanding frame moveable between an expanded position and an unexpanded position;
a filtering element attached to and movable with the expandable filter;
a sheath having a distal end portion and a proximal end, the distal end portion of the sheath being adapted to receive the expandable filter assembly for maintaining the filter assembly in the unexpanded position and being movable to expose the filter assembly; and
a torque device mountable on the elongate member to allow the user to rotate the elongate member, the torque device having a side port adapted to receive the proximal end of the sheath to shear the sheath from the elongate member through retraction of the sheath through the side port.
6 Assignments
0 Petitions
Accused Products
Abstract
An expandable frame for an embolic filtering device used to capture embolic debris in a body vessel includes a first half frame having a first control arm connected to a second control arm by a partial loop and a second half frame having a first control arm connected to a second control arm by a partial loop. The partial loops cooperatively form a composite loop for attachment of a filtering element which will expand in the body vessel to capture embolic debris entrained in the fluid of the vessel. The expandable frame and filtering element can be mounted on a filter support structure, such as a coiled wire, and mounted on a guide wire. The expandable frames include an articulation region which helps to distribute the strain which can be developed when the frame moves between an expanded and deployed position. The expandable frame may include further strain distributing bends which help distribute strain and increase the bendability of the frame. A modified torque device with extension arm prevents guide wire damage, prevents distal propagation of the peeling action and facilitates filter deployment during operation.
253 Citations
14 Claims
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1. An embolic filtering system used to capture embolic debris in a body vessel, comprising:
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an expandable filter assembly including a self-expanding frame moveable between an expanded position and an unexpanded position;
a filtering element attached to and movable with the expandable filter;
a sheath having a distal end portion and a proximal end, the distal end portion of the sheath being adapted to receive the expandable filter assembly for maintaining the filter assembly in the unexpanded position and being movable to expose the filter assembly; and
a torque device mountable on the elongate member to allow the user to rotate the elongate member, the torque device having a side port adapted to receive the proximal end of the sheath to shear the sheath from the elongate member through retraction of the sheath through the side port. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A torque device for rotating a steerable guide wire and effecting the splitting of a sheath which is co-axially disposed over the guide wire, the torque device comprising:
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a handle having a lumen extending therethrough for receiving the guide wire;
means associated with the handle to hold the guide wire within the lumen of the handle; and
a side port adapted to receive the proximal end of the sheath to remove the sheath from the elongate member through proximal retraction of the sheath through the side port. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification