VENA CAVA FILTER

摘要

The disclosure provides an implantable medical device comprising a material capture element, which has a generally closed conical deployed shape and a narrow end disposed at or proximate the first end of the device. The material capture element includes a wide end facing the second end of the device, the material capture element having a zone of wider radial dimension which provides a first vessel contact site. A plurality of wire tethers are coupled to the wide end and extend to the second end. The wire tethers define a substantially open passageway for blood and provide a second vessel contact site. The first and second contact sites are spaced longitudinally from one another to provide stability. A first retrieval element is disposed at the first end and coupled to the narrow end, while a second retrieval element is disposed at the second end and coupled to the wire tethers.

主权项

1. An implantable medical device having a first end, a second end, and a longitudinal dimension, the device including:
a material capture element having a generally closed conical deployed shape with a narrow end disposed at or proximate the first end of the device, and a wide end facing the second end of the device, the material capture element having a zone of wider radial dimension providing a first vessel contact site of the device; a plurality of wire tethers coupled to the material capture element at the wide end thereof, the wire tethers extending to the second end of the device and defining a substantially open passageway for blood and particulate material therethrough, the wire tethers having portions of wider radial dimension providing a second vessel contact site of the device, the first and second contact sites being spaced from one another along the longitudinal dimension of the device; a first retrieval element disposed at the first end of the device and coupled to the narrow end of the material capture element; and a second retrieval element disposed at the second end of the device and coupled to the wire tethers.