Inferior vena cava filter on guidewire
First Claim
1. A temporary inferior vena cava filter comprising:
- a. a guidewire, the guidewire having a distal end and a proximal end; and
,b. a two-cage filter distally situated on the guidewire, the two-cage filter including;
(1) a first resilient filter cage, the first resilient filter cage actuatable between a collapsed state and a deployed state, and,(2) a second resilient filter cage, the second resilient filter cage actuatable between a collapsed state and a deployed state, wherein the second resilient filter cage is situated distal to the first resilient filter cage.
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Accused Products
Abstract
A temporary inferior vena cava filter including a guidewire and a doublet cage filter distally located on the guidewire. The doublet cage filter has a proximal cage filter and a distal cage filter, both of resilient and biased toward their expanded or deployed state. The proximal and distal cage filters may be collapsed by actuation, preferably with a sheath. A method of protecting from pulmonary embolism during treatment of a deep vein thrombosis is disclosed. The doublet cage provides stability when deployed in the inferior vena cava, is readily retrieved and readily manufactured. A method of manufacturing the doublet cage filter assembly is also disclosed and involves a nitinol tube with plural cuts to form struts which are heat treated in an expanded state.
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Citations
39 Claims
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1. A temporary inferior vena cava filter comprising:
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a. a guidewire, the guidewire having a distal end and a proximal end; and
,b. a two-cage filter distally situated on the guidewire, the two-cage filter including; (1) a first resilient filter cage, the first resilient filter cage actuatable between a collapsed state and a deployed state, and, (2) a second resilient filter cage, the second resilient filter cage actuatable between a collapsed state and a deployed state, wherein the second resilient filter cage is situated distal to the first resilient filter cage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of providing temporary protective filtering to protect from pulmonary embolism for a patient being treated for deep vein thrombosis, the method comprising the steps of:
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a. providing a guidewire with a doublet cage filter, the doublet cage filter including at least two-cage filters actuatable between an expanded/deployable state and a collapsed/removable state and means for actuating the two-cage filters; b. inserting the two-cage filters on the guidewire into a vein of the patient and advancing the two-cage filters to a protective location relative to the deep vein thrombosis and then deploying the two-cage filters at the protective location; c. treating the deep vein thrombosis; d. retracting the two-cage filters to the collapsed state; and
,e. withdrawing the two-cage filters in the collapsed state with the attached guidewire. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A method of forming a filter cage assembly for attachment to the distal end of a guidewire, the method comprising the steps of:
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a. providing a tube; and
,b. cutting a plurality of parallel slits in the tube to define a plurality of struts. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39)
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Specification