Single-wire expandable cages for embolic filtering devices
First Claim
1. An embolic filtering device for capturing embolic debris in a body fluid flowing within a body vessel, comprising:
- a guide wire having a proximal stop fitting and an intermediate stop fitting fixedly attached thereto;
a support frame having a pre-deployment collapsed position and a deployed expanded position, wherein the support frame is made from a length of a single, continuous wire having a first end slidably attached to the guide wire between the proximal stop fitting and the intermediate stop fitting and a second end slidably attached to the guide wire at a location distal to the intermediate stop fitting; and
a filtering element having a proximal inlet opening and a plurality of distal outlet openings, the outlet openings allowing the body fluid to flow through the filtering element but retaining embolic debris within the filtering element, and the inlet opening being larger than the outlet openings, wherein the entire length of the support frame is attached to opening the proximal opening of the filtering element to open the filtering element when the support frame is in the deployed expanded position.
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Abstract
A single-wire expandable cage for an embolic filtering device includes a single cage wire coupled to an elongated member, such as a guide wire, and adapted to expand from an unexpanded position to an expanded position in a patient'"'"'s body vessel. The wire includes a first end and a second end which are coupled to the guide wire. A filter element is attached to the single-wire cage. The single-wire cage may be rotatably mounted to the guide wire or may be slidably disposed on the guide wire to allow the composite cage and filter element to be slid over the guide wire in an over-the-wire fashion once the guide wire is delivered to the target location in the patient'"'"'s vasculature. One embodiment of the single-wire cage utilizes an offset arrangement in which the guide wire remains extended along the wall of the body vessel once the single-wire cage is deployed. Another embodiment of the device centers the guide wire within the body vessel.
759 Citations
20 Claims
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1. An embolic filtering device for capturing embolic debris in a body fluid flowing within a body vessel, comprising:
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a guide wire having a proximal stop fitting and an intermediate stop fitting fixedly attached thereto; a support frame having a pre-deployment collapsed position and a deployed expanded position, wherein the support frame is made from a length of a single, continuous wire having a first end slidably attached to the guide wire between the proximal stop fitting and the intermediate stop fitting and a second end slidably attached to the guide wire at a location distal to the intermediate stop fitting; and a filtering element having a proximal inlet opening and a plurality of distal outlet openings, the outlet openings allowing the body fluid to flow through the filtering element but retaining embolic debris within the filtering element, and the inlet opening being larger than the outlet openings, wherein the entire length of the support frame is attached to opening the proximal opening of the filtering element to open the filtering element when the support frame is in the deployed expanded position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An embolic filtering device for capturing embolic debris in a body fluid flowing within a body vessel, comprising:
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a guide wire having a proximal stop fitting and an intermediate stop fitting fixedly attached thereto; a support frame having a pre-deployment collapsed position and a deployed expanded position, the support frame having a first end slidably attached to the guide wire between the proximal stop fitting and the intermediate stop fitting and a second end slidably attached to the guide wire at a location distal to the intermediate stop fitting; and a filtering element having a proximal edge forming an inlet opening and a plurality of distal outlet openings, the outlet openings allowing the body fluid to flow through the filtering element but retaining embolic debris within the filtering element, and the inlet opening being larger than the outlet openings, wherein the entire support frame is attached to the proximal edge of the filtering element. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification