Removable vascular filter, catheter system and methods of use
OwnerCarlos E. Ruizinventor
Life of this patent
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Abstract
A removable vascular filter and apparatus and methods for removing the removable vascular filter are provided. The removable vascular filter is held in place by a coiled-sheet stent portion having a magnetic band disposed on its interior edge. A catheter system is also provided having an electromagnet configured to engage the magnetic band and enable the coiled-sheet stent portion and filter sack to be wound to a reduced diameter to facilitate transluminal removal of the vascular filter and its contents.
Claims20
A vascular filter comprising:
- a coiled-sheet stent portion having a deployed state, wherein the coiled-sheet stent has a first diameter, and a delivery state, wherein the coiled-sheet stent has a second diameter, smaller than the first diameter;
- and
- a filter sack attached to an end of the coiled-sheet stent, the filter sack configured to span a flow area of a vessel when the coiled-sheet stent portion transitions to the deployed state.
Apparatus for removing a vascular filter device, the vascular filter device including a coiled-sheet stent portion and a magnetic band disposed adjacent an interior edge of the coiled-sheet stent portion, the apparatus comprising:
- an outer sleeve having a proximal end, a distal end, a lumen extending between the proximal end and the distal end, and a slot on a lateral surface of the distal end that communicates with the lumen;
- a shaft disposed for rotation within the lumen, the shaft having a proximal and a distal end;
- and
- an electromagnetic plate disposed on a lateral surface of the shaft near the distal end of the shaft, the electromagnetic plate being selectively switchable between an energized and a non-energized state.
A method of removing a vascular filter, the vascular filter including a coiled-sheet stent portion, a filter sack connected to an end of the coiled-sheet stent portion, and a magnetic band disposed adjacent an interior edge of the coiled-sheet stent portion, the method comprising:
- providing a shaft having a proximal end, a distal end, and an electromagnetic plate disposed on a lateral surface near the distal end, the electromagnetic plate being selectively switchable between an energized state and a non-energized state;
- positioning the electromagnetic plate near the magnetic band;
- switching the electromagnetic plate to the energized state to cause the magnetic band to engage the electromagnetic plate;
- rotating the shaft to wind the coiled-sheet stent portion around the shaft;
- and
- withdrawing the shaft and the vascular filter.
Dependencies are inferred from the claim text.