UMBRELLA INFERIOR VENA CAVA FILTER RETRIEVAL DEVICE

摘要

A device for retrieval of a vena cava filter is provided. The retrieval device has, approximately, an umbrella shape and consists of a central shaft; a plurality of frame struts, attached to frame strut attachment points on the central shaft and disposed radially about the central shaft; and a plurality of snare wires. The retrieval device has a collapsed configuration for insertion and removal from a blood vessel of a patient and an expanded state for capturing an intravascular filter in the blood vessel of the patient. The plurality of snare wires provides multiple points at which a vena cava filter, particularly one that has become misaligned during deployment or treatment, can be caught. The frame struts can be substantially sinusoidal in shape and made of shape memory metal, such as Nitinol. The snare wires can be made of a biocompatible material such as silk, polyester, polypropylene, or nylon.

主权项

1. A retrieval device for an intravascular filter, the retrieval device comprising:
a central shaft extending from a first proximal end to a first distal end defining a first longitudinal axis; a plurality of frame struts, each strut of the plurality of frame struts extending from a first end to a second end defining a strut length, the second ends being attached to frame strut attachment points on the central shaft and being disposed radially about the central shaft; and a plurality of snare wires, each snare wire of the plurality of snare wires connected to each of the frame struts at intervals along the strut lengths, wherein the retrieval device has a collapsed configuration for insertion and removal from a blood vessel of a patient and an expanded state for capturing an intravascular filter in the blood vessel of the patient.