Retrievable inferior vena cava filter system and method for use thereof
First Claim
1. A filtering system for filtering emboli from blood within a blood vessel, said filtering system comprising:
- a delivery catheter having a first working access lumen defining a working access axis, and a second filter deployment/retrieval lumen defining a filter deployment/retrieval axis; and
a filtering device receivable within said filter deployment/retrieval lumen, said filtering device including a deployment/retrieval wire section and a filtering element formed at the distal end of said deployment/retrieval wire section, said filtering element being made of shape memory/superelastic material and being formed to have a pre-disposed shape which, when said filtering element has been deployed by being extended distally from said delivery catheter through said filter deployment/retrieval lumen thereof, defines a filtering channel that is offset from said deployment/retrieval axis and which extends about the extended axis of the working access lumen of the delivery catheter, whereby when said filtering element is so deployed within a blood vessel, emboli trapped within the filtering element are funneled toward the working access lumen of said delivery catheter for removal therethrough.
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Accused Products
Abstract
A percutaneous filter system for providing temporary filtering of emboli from the blood is disclosed, the filter system including a delivery catheter having a first working access lumen and a second filter deployment/retrieval lumen containing a filtering device which is deployable therefrom. The filtering device includes a deployment/retrieval wire section and a filtering element formed at the distal end of said deployment/retrieval wire section. The filtering element is made of shape memory/superelastic material and is formed to have a distally expanding frustoconical pre-disposed shape which, when the filtering element is deployed by being extended distally from the delivery catheter through the filter deployment/retrieval lumen thereof, defines a filtering channel that is offset from said deployment/retrieval axis and extends about the extended axis of the working access lumen of the delivery catheter. When the filtering element is so deployed within a blood vessel, emboli trapped within the filtering element are funneled toward working access lumen of the delivery catheter and can easily be aspirated or otherwise removed therethrough. With the filtering element in place in its deployed position, other instrumentation may also be passed through the working access lumen of the delivery catheter and the filtering channel to gain access into the blood vessel as desired.
418 Citations
21 Claims
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1. A filtering system for filtering emboli from blood within a blood vessel, said filtering system comprising:
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a delivery catheter having a first working access lumen defining a working access axis, and a second filter deployment/retrieval lumen defining a filter deployment/retrieval axis; and a filtering device receivable within said filter deployment/retrieval lumen, said filtering device including a deployment/retrieval wire section and a filtering element formed at the distal end of said deployment/retrieval wire section, said filtering element being made of shape memory/superelastic material and being formed to have a pre-disposed shape which, when said filtering element has been deployed by being extended distally from said delivery catheter through said filter deployment/retrieval lumen thereof, defines a filtering channel that is offset from said deployment/retrieval axis and which extends about the extended axis of the working access lumen of the delivery catheter, whereby when said filtering element is so deployed within a blood vessel, emboli trapped within the filtering element are funneled toward the working access lumen of said delivery catheter for removal therethrough. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for filtering emboli from blood within a blood vessel, said method comprising the steps of:
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introducing a delivery catheter into the blood vessel, the delivery catheter having a first working access lumen defining a working access axis, and a second filter deployment/retrieval lumen defining a filter deployment/retrieval axis, and a filtering device received within the filter deployment/retrieval lumen, the filtering device including a deployment/retrieval wire section and a filtering element formed at the distal end of the deployment/retrieval wire section, the filtering element being made of shape memory/superelastic material and being formed to have a pre-disposed shape which, when the filtering element has been deployed by being extended distally from the delivery catheter through the filter deployment/retrieval lumen thereof, defines a filtering channel that is offset from the deployment/retrieval axis and which extends about the extended axis of the working access lumen of the delivery catheter; advancing the distal end of the delivery catheter to a desired location within the blood vessel; and advancing the filtering device relative to the delivery catheter so that the filtering element exits the filter deployment/retrieval lumen at the distal end of the catheter and expands into its pre-disposed shape within the blood vessel, whereby emboli trapped within the filtering element are funneled toward the working access lumen of the delivery catheter for removal therethrough. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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Specification