Apparatus and method for filtering intravascular fluids and for delivering diagnostic and therapeutic agents
First Claim
1. An apparatus for filtering fluids intravascularly, comprising:
- a resilient fiber core having a preset shape;
a polymer material covering the resilient fiber core and having a shape defined by the preset shape of the resilient fiber core; and
a filtering device attached to said polymer material for filtering fluids;
wherein said filtering device comprises a filtration sock made of a porous material, said filtration sock having an open end and a closed end, said open end being held open by the preset shape of the resilient fiber core.
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Abstract
An apparatus and method for filtering intravascular fluids and for delivering diagnostic and therapeutic agents intravascularly is disclosed in which the apparatus has a shape defined by a preset shape of a resilient fiber core. The resilient fiber core is covered by a soft polymer tubing or other polymer material to form a delivery apparatus that takes the shape of the resilient fiber core. Various shapes and structures are disclosed that infuse diagnostic and therapeutic agents through a lumen of the polymer tubing, that deliver the agents in the form of a soluble coating, that circulate or contain a preloaded charge of radioactive material for intravascular radiotherapy, and that deploy filtration devices intravascularly for removing particulate matter from body fluid. The resilient fiber core and soft polymer material permit the construction of a very small apparatus that can be removed easily following treatment. Various deployment systems are disclosed for deploying the filtering and delivery apparatuses into a vessel and for protecting against radiation exposure.
145 Citations
18 Claims
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1. An apparatus for filtering fluids intravascularly, comprising:
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a resilient fiber core having a preset shape;
a polymer material covering the resilient fiber core and having a shape defined by the preset shape of the resilient fiber core; and
a filtering device attached to said polymer material for filtering fluids;
wherein said filtering device comprises a filtration sock made of a porous material, said filtration sock having an open end and a closed end, said open end being held open by the preset shape of the resilient fiber core. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
11.The apparatus according to claim 1, wherein said preset shape of the resilient fiber core includes a plurality of hoops connected together by linear portions extending in an axial direction, said polymer material covers the hoops and linear portions to define a plurality of axially spaced hoops, said filtering device comprises a filtration sock attached to said polymer material with an open end attached to a first one of said hoops and a closed end for filtering fluids, and a slip ring connecting an intersection of one of said linear portions and said first hoop to facilitate closing said filtration sock upon pulling said apparatus into a sheath for removal.
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11. An apparatus for filtering fluids intravascularly comprising:
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a resilient fiber core having a preset shape;
a polymer material covering the resilient fiber core and having a shape defined by the preset shape of the resilient fiber core; and
a filtering device attached to said polymer material for filtering fluids;
wherein said polymer tubing comprises a means for delivering and infusing a fluid-based therapeutic agent into a vessel adjacent to said filtering device.
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12. A method for filtering fluids intravascularly, comprising the steps of:
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providing an apparatus having a resilient fiber core with a preset shape, a soft polymer tubing encasing the resilient fiber core and adapting to the shape of the resilient fiber core, and a filtering device attached to said polymer tubing for filtering fluids;
placing said apparatus into a vessel; and
causing a diameter of said filtering device to enlarge within the vessel.
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13. The method according to claim 13, further comprising the steps of:
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loading said apparatus into a delivery sheath having an internal diameter smaller than a preset diameter of the preset shape of said resilient fiber core;
inserting said delivery sheath and said apparatus into a vessel; and
moving said apparatus out of said delivery sheath whereby said resilient fiber core causes said apparatus and said filtering device to increase in diameter and lodge within the vessel. - View Dependent Claims (14)
further comprising the step of moving said outer support tube relative to said first end to change a diameter of the coiled portion within the vessel.
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15. A coil apparatus for filtering fluids intravascularly, comprising:
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a resilient fiber core having a linear portion and a coiled portion;
a polymer tubing encasing the resilient fiber core and adapting to the shape of the resilient fiber core, said polymer tubing comprising a first portion encasing the linear portion of the resilient fiber core and a second portion encasing the coiled portion of the resilient fiber core; and
a filtering device attached to said second portion of said polymer tubing for filtering fluids.
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- 16. The coil apparatus according to claim 16, wherein said filtering device comprises a filtration sock made of a porous material, said filtration sock having an open end and a closed end, said open end being held open by the coiled portion of the resilient fiber core.
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18. An apparatus for filtering fluids intravascularly, comprising:
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a resilient fiber core having a preset shape;
a polymer material covering the resilient fiber core and having a shape defined by the preset shape of the resilient fiber core; and
a filtering device attached to said polymer material for filtering fluids;
wherein said polymer material has a lumen and a means for releasing fluid-based agents delivered through said lumen.
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Specification