Embolus blood clot filter delivery system
First Claim
Patent Images
1. A blood filter and delivery apparatus for delivering a blood filter into a blood vessel, the vessel having a wall and a centerline, the apparatus comprising:
- a) a blood filter including a plurality of filter members, a proximal filter end, and a distal filter endb) a catheter having proximal and distal ends, the distal end being a free end portion with an opening, the catheter having a catheter wall with an inner surface surrounding a catheter lumen;
c) a filter positioning assembly situated with the filter within the catheter lumen to define a stored position, the filter positioning assembly including a plurality of positioner members, each of the plurality of positioner members having a distal end that is connected to one or more filter members of the filter within the catheter lumen in said stored position;
d) wherein in said stored position, the filter is positioned closer to the filter opening than the positioning assembly;
e) a pusher that engages the positioning assembly and filter inside the lumen in said stored position, wherein the positioning assembly and filter are movable from said stored position within the catheter lumen, to a preliminary dispensed position, and to a fully deployed position;
f) wherein in said preliminary dispensed position, some of the filter members and some of the positioning members engage the vessel wall while at least a portion of some of the filter members remain inside the catheter lumen; and
g) wherein in said fully deployed position all the filter members of the filter are deployed in the vessel by at least partially retracting the plurality of positioner members with the catheter.
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Abstract
A blood filter delivery system for delivering a blood filter into a vein includes a push rod for pushing the blood filter through and out of a catheter, the push rod having a filter positioning assembly on one end. The filter positioning assembly includes positioner members, which retain anchor members of the filter. The filter positioning assembly can position the end of the delivery catheter near the blood vessel centerline before releasing the filter'"'"'s anchor members, thereby helping to align the blood filter along the centerline of the blood vessel.
53 Citations
29 Claims
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1. A blood filter and delivery apparatus for delivering a blood filter into a blood vessel, the vessel having a wall and a centerline, the apparatus comprising:
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a) a blood filter including a plurality of filter members, a proximal filter end, and a distal filter end b) a catheter having proximal and distal ends, the distal end being a free end portion with an opening, the catheter having a catheter wall with an inner surface surrounding a catheter lumen; c) a filter positioning assembly situated with the filter within the catheter lumen to define a stored position, the filter positioning assembly including a plurality of positioner members, each of the plurality of positioner members having a distal end that is connected to one or more filter members of the filter within the catheter lumen in said stored position; d) wherein in said stored position, the filter is positioned closer to the filter opening than the positioning assembly; e) a pusher that engages the positioning assembly and filter inside the lumen in said stored position, wherein the positioning assembly and filter are movable from said stored position within the catheter lumen, to a preliminary dispensed position, and to a fully deployed position; f) wherein in said preliminary dispensed position, some of the filter members and some of the positioning members engage the vessel wall while at least a portion of some of the filter members remain inside the catheter lumen; and g) wherein in said fully deployed position all the filter members of the filter are deployed in the vessel by at least partially retracting the plurality of positioner members with the catheter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A blood filter and delivery assembly for delivering a blood filter to a blood vessel having a blood vessel wall, comprising:
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a) a storage tube having proximal and distal end portions, a tube bore, and a distal open end at said distal end portion; b) a blood filter having a filter proximal and a filter distal end and positioned within the storage tube bore to provide a storage position wherein the filter distal end is closer than the filter proximal end to the storage tube distal open end, the blood filter including a plurality of filter members having free end portions that are positioned proximally in said storage position; c) a filter positioning assembly positioned within the storage tube bore in said storage position, the filter positioning assembly including a plurality of positioner members that extend distally and connect to the free end portions of the plurality of filter members in said storage position that places the filter closer to the distal open end and the positioning assembly farther from the distal open end relative to said filter; d) a pusher that engages and pushes the connected positioner assembly and filter from the lumen toward the vessel via the distal open end into a preliminary dispensed position, and into a fully deployed position; e) wherein in said preliminary dispensed position, the positioner members engage the vessel wall while at least a portion of some of the filter members appendages remain in the tube bore; and f) wherein in said fully deployed position all the filter members of the filter are deployed in the vessel by at least partially retracting the plurality of positioner members with the catheter. - View Dependent Claims (19)
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20. A push rod assembly for use in delivering a filter into a blood vessel, the vessel having a wall, the assembly comprising:
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a) a catheter having a catheter bore and a distal open end; b) a blood filter having proximal and distal filter ends and a plurality of anchor members having anchor end portions at said proximal filter end; c) a push rod extending along a longitudinal axis from a first end to a second end; d) a handle disposed proximate the first end; e) a filter positioning assembly disposed at the second end, the filter positioning assembly having a longitudinal axis and including; a hub; and a plurality of positioner members coupled to the hub, each positioner member having a positioner end extending distally, wherein each of the plurality of positioner members is curved and oriented so that the positioner members extend away from the longitudinal axis when unconstrained, and the positioner members are configured to extend toward the longitudinal axis so that the positioner members connect to and retain the plurality of anchor members when the positioner members and blood filter are positioned within the catheter in a storage position; f) the anchor end portions being the most proximate portion of the filter; g) the positioner ends being the most distal portion of the filter positioning assembly; h) wherein the filter and positioner members are movable to a preliminary dispensed position and to a fully deployed position; i) wherein in said preliminary dispensed position, the positioner ends engage the vessel wall, wherein at least a portion of some of the anchor members remain in the catheter bore proximally of said catheter distal open end; and j) wherein in said fully deployed position all the filter members of the filter are deployed in the vessel by at least partially retracting the plurality of positioner members with the catheter. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28)
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29. A blood filter delivery apparatus for delivering a blood filter into a blood vessel, the vessel having a wall, the apparatus comprising:
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a) a blood filter including a plurality of anchor members and having proximal and distal end portions; b) a catheter having proximal and distal ends, a bore, and a distal catheter opening at the distal end of the catheter; c) a filter positioning assembly situated within the catheter bore, the filter positioning assembly including a plurality of positioner members, each having a positioner distal end and a hub defining a plurality of splines, each of the splines being configured to cooperate with and retain the plurality of anchor members within the catheter when the ends of the positioner members are the most distal portion of the positioning assembly disposed within the catheter; d) wherein the anchor members have proximal free ends that are the most proximal portion of the blood filter; e) wherein in an initial, partially dispensed position the distal ends of the positioner members engage the vessel wall while at least a portion of some of the anchor members are located in the catheter bore proximally of said distal catheter opening; and f) wherein in a fully deployed position all the filter members of the filter are deployed in the vessel by at least partially retracting the plurality of positioner members with the catheter.
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Specification