Inferior filter retrieval device
AssigneeCook Medical Technologies LLC
InventorsJonathan L. Bennett, Robert Eells, Jeffry S. Melsheimer, Shavonna Warren
Life of this patent
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Abstract
A device for inferior retrieval of a vena cava filter includes an outer sheath with a first radial window closer to the distal end than the proximal end of the outer catheter; an inner sheath generally extending movably inside the lumen of the outer sheath and having a second radial window; and a snare tool having an elongated guide element extending through the inner sheath and a snare loop distally attached to the guide element. The snare loop is extendable outward through the two radial windows.
Claims18
A device for inferior retrieval of a vena cava filter, the device comprising:
- an outer sheath with a first lumen longitudinally extending from a first proximal end to a first distal end, the outer sheath having a first radial window between the first proximal end and the first distal end, the first radial window being closer to the first distal end than the first proximal end;
- an inner sheath generally extending movably inside the lumen of the outer sheath, the inner sheath having a lumen extending from a second proximal end to a second distal end;
- and
- a snare tool having an elongated guide element extending through the inner sheath and a snare distally attached to the guide element, the snare extendable outward from an opening in the inner sheath and outward through the first radial window in the outer sheath.
A method of removing an implantable device having proximally extending radially collapsible struts, a distal hub and a removal hook distally attached to the hub, the method comprising the steps of:
- providing an outer sheath with a first lumen longitudinally extending from a first proximal end to a first distal end, the outer sheath having a first radial window between the first proximal end and the first distal end, the first radial window being closer to the first distal end than the first proximal end;
- providing an inner sheath generally extending inside the lumen of the outer sheath, the inner sheath having a lumen extending from a second proximal end to a second distal end, the inner sheath having a second radial window between the second proximal end and the second distal end;
- and
- providing a snare tool having an elongated guide element extending through the inner sheath and a snare loop distally attached to the guide element;
- advancing the outer sheath, the inner sheath and the snare tool distally past the removal hook of the implantable device until the first radial opening is positioned distally from the implantable device;
- aligning the first and second radial openings to obtain an overlap with each other;
- extending the snare loop outward through the first and second radial openings;
- engaging the removal hook with the snare loop;
- distally moving the snare tool relative to the outer and inner sheaths so as to distally pull the implantable device into the inner sheath until the proximal struts are substantially accommodated within the inner sheath;
- moving the inner sheath relative to the outer sheath until the overlap between the first radial opening and the second radial opening is substantially reduced;
- and
- proximally withdrawing the outer sheath along with the inner sheath, the snare tool and the implantable device.
Dependencies are inferred from the claim text.