Removeable embolus blood clot filter and filter delivery unit
First Claim
1. A filter to be placed in a flow of blood through a vessel, the vessel having a wall, the filter comprising:
- a hub extending along a longitudinal axis between first and second ends;
a set of first members projecting from the hub second end, each of the first members including a hook spaced along the longitudinal axis from the hub, each hook being spaced radially from the longitudinal axis a first distance, each of the first members further including a first linear segment extending substantially parallel to the longitudinal axis, a second linear segment extending tangentially with respect to the respective hook, and an intermediate linear segment extending between and obliquely coupled to the first and second segments, each of the second segments extending obliquely with respect to the longitudinal axis at a first angle, and each of the intermediate segments extending obliquely with respect to the longitudinal axis at a second angle less than the first angle; and
a set of second members projecting from the hub second end and having a portion of at least one second member contiguous to a portion of at least one first member, each of the second members including a tip being spaced along the longitudinal axis from the hub, and each tip being spaced radially from the longitudinal axis a second distance less than the first distance.
0 Assignments
0 Petitions
Accused Products
Abstract
A blood clot filter is collapsible toward a longitudinal axis into a collapsed configuration for insertion into a blood vessel, and is radially expandable outwardly from the longitudinal axis to an expanded configuration for contact with the inner wall of the blood vessel at two longitudinal spaced locations. A first plurality of spaced, elongate arms, in the expanded configuration, curve outwardly away from the longitudinal axis toward the leading end of the filter to form a first filter basket and to center a hub at the trailing end of the filter within the vessel. A second plurality of spaced elongate legs angle outwardly away from the longitudinal axis toward the leading edge of the filter in the expanded configuration to form a second filter basket opening toward the leading end. The ends of these legs include hooks to bend and straighten in response to withdrawal force.
-
Citations
22 Claims
-
1. A filter to be placed in a flow of blood through a vessel, the vessel having a wall, the filter comprising:
-
a hub extending along a longitudinal axis between first and second ends; a set of first members projecting from the hub second end, each of the first members including a hook spaced along the longitudinal axis from the hub, each hook being spaced radially from the longitudinal axis a first distance, each of the first members further including a first linear segment extending substantially parallel to the longitudinal axis, a second linear segment extending tangentially with respect to the respective hook, and an intermediate linear segment extending between and obliquely coupled to the first and second segments, each of the second segments extending obliquely with respect to the longitudinal axis at a first angle, and each of the intermediate segments extending obliquely with respect to the longitudinal axis at a second angle less than the first angle; and a set of second members projecting from the hub second end and having a portion of at least one second member contiguous to a portion of at least one first member, each of the second members including a tip being spaced along the longitudinal axis from the hub, and each tip being spaced radially from the longitudinal axis a second distance less than the first distance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A filter to be placed in a flow of blood through a vessel, the filter comprising:
-
a hub disposed along a longitudinal axis between first and second ends; at least one anchor projecting from the hub second end, the at least one anchor including a hook that penetrates a wall of the blood vessel, the hook being spaced along the longitudinal axis from the hub, and spaced a first radial distance from longitudinal axis, the at least one anchor further including a first linear segment extending substantially parallel to the longitudinal axis, a second linear segment extending tangentially with respect to the respective hook, and an intermediate linear segment extend between and obliquely coupled to the first and second segments, each of the second segments extending obliquely with respect to the longitudinal axis at a first angle, and each of the intermediate segments extending obliquely with respect to the longitudinal axis at a second angle less than the first angle; and at least one locator projecting from the hub second end, the at least one locator having at least a portion proximate a tip that engages the wall of the vessel, the tip being spaced along the longitudinal axis from the hub, and spaced a second radial distance from the longitudinal axis, the second radial distance being less than the first radial distance. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
-
Specification