Removable vein filter
First Claim
1. A removable vessel filter comprising a first filtering portion, a first anchoring portion spaced axially from the first filtering portion, a transverse dimension of the first filtering portion in an expanded configuration being less than a transverse dimension of the first anchoring portion in an expanded configuration, and a second filtering portion and a second anchoring portion, the second anchoring portion spaced axially from and non-overlapping the first filtering portion and first anchoring portion, a transverse dimension of the second filtering portion being less than a transverse dimension of the second anchoring portion, the first and second filtering portions being positioned closer to each other than the first and second anchoring portions, and the anchoring portions being formed on first and second opposite portions of the vessel filter and forming closed loops, the vessel filter being removable from a vessel wall by engagement of either the first filtering portion or the second filtering portion.
14 Assignments
0 Petitions
Accused Products
Abstract
The present provides a removable vessel filter comprising a first and second filtering portion and a first and second anchoring portion, wherein a transverse dimension of the first filtering portion in an expanded configuration is less than a transverse dimension of the first anchoring portion in an expanded configuration, and a transverse dimension of the second filtering portion is less than a transverse dimension of the second anchoring portion. The first and second filtering portions are positioned closer to each other than the first and second anchoring portions, and the anchoring portions being formed on first and second opposite portions of the vessel filter. The vessel filter is removable from a vessel wall by engagement of either the first filtering portion or the second filtering portion.
261 Citations
18 Claims
- 1. A removable vessel filter comprising a first filtering portion, a first anchoring portion spaced axially from the first filtering portion, a transverse dimension of the first filtering portion in an expanded configuration being less than a transverse dimension of the first anchoring portion in an expanded configuration, and a second filtering portion and a second anchoring portion, the second anchoring portion spaced axially from and non-overlapping the first filtering portion and first anchoring portion, a transverse dimension of the second filtering portion being less than a transverse dimension of the second anchoring portion, the first and second filtering portions being positioned closer to each other than the first and second anchoring portions, and the anchoring portions being formed on first and second opposite portions of the vessel filter and forming closed loops, the vessel filter being removable from a vessel wall by engagement of either the first filtering portion or the second filtering portion.
- 13. A removable vessel filter comprising a first portion, a second portion and an intermediate portion between the first and second portions, the first portion increasing in diameter from the intermediate portion towards a first end, and the second portion increasing in diameter from the intermediate portion towards a second end, the first and second portions having loops of different transverse dimension, a region closer to the intermediate portion forming a filter portion, the vessel filter having at least one vessel engaging member formed on a loop of the second portion to temporarily retain the filter within the vessel and allow subsequent disengagement from the vessel wall and removal of the filter.
- 16. A removable vessel filter comprising a proximal portion forming an anchoring portion, a distal portion forming a filtering portion, a transverse dimension of the filter decreasing from the proximal portion toward the distal portion of the filter such that the filter has a larger transverse dimension at a proximal end than at a distal end, a first wire section extending from the proximal portion to the distal portion and forming a first series of loops extending substantially in a first direction, a second wire section extending from the proximal to the distal portion and forming a second series of loops extending substantially in a second direction different than the first direction, a transverse dimension of the loops of the first series and a transverse dimension of the loops of the second series decreasing from the proximal portion to the distal portion, and at least one anchoring member configured to engage the vessel wall and temporarily retain the filter within the vessel, the vessel filter being composed of shape memory material and movable from a collapsed configuration for delivery to the vessel to an expanded configuration for engagement with the vessel, and further movable towards the collapsed configuration upon application of an axial force thereto to enable removal of the vessel filter from the vessel.
Specification