Filter element with retractable guidewire tip
First Claim
Patent Images
1. A medical guidewire assembly comprising:
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a guidewire having a flexible tip at a distal end of the guidewire;
a medical device mounted near the distal end of the guidewire proximally of the tip, the medical device being movable relative to the tip for adjustment of the amount of the tip extending distally of the medical device;
and means to limit the movement of the medical device relative to the tip.
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Abstract
A medical guidewire assembly comprises a guidewire having a flexible tip. A medical device such as a collapsible filter for use as an embolic protection device is mounted on the guidewire. The filter is advanced through a body lumen with the guidewire tip extending distally. At a first location the filter is advanced relative to the tip to a location which is distally advanced from the first location. Placement of the filter in an optimal distal location is thereby achieved.
355 Citations
49 Claims
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1. A medical guidewire assembly comprising:
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a guidewire having a flexible tip at a distal end of the guidewire;
a medical device mounted near the distal end of the guidewire proximally of the tip, the medical device being movable relative to the tip for adjustment of the amount of the tip extending distally of the medical device;
and means to limit the movement of the medical device relative to the tip. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 48)
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31. A medical guidewire assembly substantially as hereinbefore described with reference to the accompanying drawings.
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32. An embolic protection device comprising:
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a collapsible filter element mounted on a filter carrier for delivery through a vascular system of a patient;
the filter element being movable between a collapsed stored position against the filter carrier 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 filter element;
the filter element comprising a collapsible 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;
the collapsible filter element being slidably mounted on the filter carrier for axial movement of the filter element along the filter carrier; and
means to limit the movement of the filter element relative to the filter carrier, the means being arranged to allow a distal end of the filter carrier to be substantially retracted into the filter element. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
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47. An embolic protection device substantially as hereinbefore described with reference to the accompanying drawings.
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49. A method for positioning a medical device in a body lumen substantially as hereinbefore described with reference to the accompanying drawings.
Specification