Double Cone Biodegradable Filter

摘要

The present disclosure provides for a double cone filter and a delivery apparatus for deploying the filter within the body. The filter may have superior and inferior rings connected to each other by a plurality of connectors. The rings may have a first degradation rate, and the connectors may have a second degradation rate. The second degradation rate may be faster than the first degradation rate, such that the connectors degrade faster than the rings. In this way, the filter has a filtering state when the connectors are present. After the connectors degrade or partially degrade, the rings may relax against the vessel wall in an open state. After a sufficient length of time, the rings also degrade such that the filter is completely removed from the body.

主权项

1. A filter for use in a body vessel having a longitudinal axis, the filter comprising:
a superior ring comprising a plurality of superior struts having a first superior strut extending to a second superior strut, defining a first superior valley, and a third superior strut extending to a fourth superior strut, defining a second superior valley, the superior ring having first superior valleys alternating with second superior valleys; an inferior ring comprising a plurality of inferior struts having a first inferior strut extending to a second inferior strut, defining a first inferior peak, and a third inferior strut extending to a fourth inferior strut, defining a second inferior peak, the inferior ring having first inferior peaks alternating with second inferior peaks; a plurality of connectors extending between the superior and inferior rings, each connector having a first end extending to a second end with a central region therebetween, the plurality of connectors cross each other at their respective central regions, each first superior valley having one first end attached to and parallel with the first superior strut and extending to the second end being attached to and parallel with one second inferior strut; and the plurality of connectors having a degradation rate greater than that of the superior ring and that of the inferior ring such that the filter has a filtering state and an open state, the first and second superior valleys and first and second inferior peaks extend toward the respective central regions in the filtering state, and the first and second superior valleys and the first and second inferior peaks contact the body vessel in the open state.