Guidewire filter and methods of use
First Claim
1. A medical device, comprising:
- a guidewire having a proximal region and a distal region;
an actuatable stop positioned along the guidewire within the distal region, the actuatable stop actuatable between a traversable state and an untraversable state;
a filter with proximal and distal ends, the filter slidably disposed over the guidewire between a first position in which the filter lies entirely proximal of the actuatable stop and a second position wholly within the distal region and distal of the actuatable stop, wherein the filter proximal end cannot pass proximally over the actuatable stop when the actuatable stop is in the untraversable state and the filter proximal end can pass proximally over the actuatable stop when the actuatable stop is in the traversable state; and
an actuator that interacts with the actuatable stop to actuate the actuatable stop between the traversable and untraversable states.
1 Assignment
0 Petitions
Accused Products
Abstract
A filter system for temporary placement of a filter in an artery or vein is disclosed. The filter system includes a guidewire that is first positioned across a lesion within a vessel. The guidewire may include a distal stop. A slideable filter is then advanced along the guidewire using an advancing mechanism, typically an elongate member slideable over the guidewire and contacting the filter. A capture sheath may be disposed about the filter during advancement. Once the filter is positioned downstream of the lesion, the capture sheath is withdrawn, allowing the filter to expand. Further distal advancement of the filter is prohibited by the stop. After expansion of the filter, the capture sheath and the advancing mechanism are withdrawn from the region of interest, and removed from the patient'"'"'s vessel. The filter may then be retrieved using a capture sheath or exchanged for a second filter after removing the first filter.
83 Citations
27 Claims
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1. A medical device, comprising:
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a guidewire having a proximal region and a distal region; an actuatable stop positioned along the guidewire within the distal region, the actuatable stop actuatable between a traversable state and an untraversable state; a filter with proximal and distal ends, the filter slidably disposed over the guidewire between a first position in which the filter lies entirely proximal of the actuatable stop and a second position wholly within the distal region and distal of the actuatable stop, wherein the filter proximal end cannot pass proximally over the actuatable stop when the actuatable stop is in the untraversable state and the filter proximal end can pass proximally over the actuatable stop when the actuatable stop is in the traversable state; and an actuator that interacts with the actuatable stop to actuate the actuatable stop between the traversable and untraversable states. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A device for filtering emboli, comprising:
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a guidewire having a proximal region and a distal region with a filter stop means in the distal region; an actuatable stop within the distal region actuatable between traversable and untraversable states; a filter with proximal and distal ends, the filter slidably disposed over the guidewire between a first position in which the filter lies entirely proximal of the actuatable stop, wherein the filter proximal end cannot pass proximally over the actuatable stop when the actuatable stop is in the untraversable state and the filter proximal end can pass proximally over the actuatable stop when the actuatable stop is in the traversable state; and an actuating means that interacts with the actuatable stop to actuate the actuatable stop between the traversable and untraversable states. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25)
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26. A medical device, comprising:
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a guidewire having a proximal region and a distal region with an actuatable stop within the distal region; the actuatable stop actuatable between traversable and untraversable states; a slidable device with proximal and distal ends, the slidable device slidably disposed on the guidewire between a first position in which the filter lies entirely proximal of the actuatable stop and a second position wholly within the distal region and distal of the actuatable stop, wherein the slidable device proximal end cannot pass proximally over the actuatable stop when the actuatable stop is in the untraversable state and the slidable device proximal end can pass proximally over the actuatable stop when the actuatable stop is in the traversable state; and an actuator that interacts with the actuatable stop to actuate the actuatable stop between the traversable and untraversable states. - View Dependent Claims (27)
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Specification