INTRAVASCULAR FILTER RETRIEVAL DEVICE HAVING AN ACTUATABLE DILATOR TIP
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Abstract
A filter retrieval device having an actuatable dilator tip for retrieval of an intravascular filter from a body lumen is disclosed. An outer shaft coupled to a distal sheath is advanced along a filter wire to desired point within the vasculature. An intravascular filter such as a distal protection filter can be advanced along the filter wire to a point distal a lesion to collect debris dislodged during a medical procedure. Disposable in part within the distal sheath is an actuatable dilator tip adapted to retrieve the filter at least in part within the distal sheath. Actuation of the dilator tip may be accomplished by any number of means, including a resilient member such as a spring coil, or by a reduced inner diameter portion disposed on the distal sheath adapted to engage a plurality of recessed surfaces disposed on the dilator tip.
118 Citations
15 Claims
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1. (canceled)
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2. A filter system, comprising:
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a filter wire having a proximal end and a distal end;
a filter disposed proximal of the distal end of the filter wire;
a shaft having a proximal end, a distal end, and a distal sheath disposed at least in part distally thereof, said distal sheath having a reduced inner diameter portion; and
a dilator tip slidably disposable along the filter wire, said dilator tip having a plurality of recessed surfaces adapted to engage the reduced inner diameter portion of said distal sheath. - View Dependent Claims (3, 4, 5, 6, 7)
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8. A device for removing an intravascular filter from a body lumen, comprising;
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a shaft having a proximal end, a distal end, and a reduced inner diameter portion; and
a dilator tip slidably disposable along a filter wire, said dilator tip having a plurality of recessed surfaces adapted to engage the reduced inner diameter portion of said shaft. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A method for retrieving an intravascular filter from a body lumen, comprising the steps of:
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providing a filter retrieval device having a distal sheath extending distally from a shaft, and a dilator tip slidably disposable along a filter wire, wherein said distal sheath has a reduced inner diameter portion adapted to engage a first recessed surface and a second recessed surface disposed on said dilator tip;
attaching the dilator tip to the distal sheath in a first position, wherein said reduced inner diameter portion is engaged along said first recessed surface;
advancing the filter retrieval device distally along the filter wire until the distal end of said dilator tip attaches to the filter, retracting the dilator tip to a second position, wherein said reduced inner diameter portion engages said second recessed surface, and wherein said filter is disposed at least in part within the distal sheath; and
removing the filter retrieval device containing the filter from the body. - View Dependent Claims (15)
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Specification