Absorbable Vascular Filter

• US 20130226222A1
• Filed: 02/23/2012
• Published: 08/29/2013
• Est. Priority Date: 02/28/2011
• Status: Active Grant

• Current Assignee: Adient Medical, Inc.
• Original Assignee: Mitchell Donn Eggers
• Inventors: Eggers, Mitchell Donn
• Granted Patent: US 10,531,942 B2
• Time in Patent Office: Days
• US Class Current: 606/200
• CPC Class Codes: A61F 2/01 Filters implantable into blood vessels
• CPC Class Codes: A61F 2/011 Instruments for their placement or removal
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2002/016 made from wire-like elements
• CPC Class Codes: A61F 2210/0004 bioabsorbable

Abstract

An absorbable vascular filter is disclosed for deployment within a vessel for temporary filtering of body fluids. A preferred embodiment is the placement of such absorbable vascular filter within the inferior vena cava (IVC) to filter emboli for the prevention of pulmonary embolism for a limited duration in time. Once protection from PE is complete, the filter is biodegraded according to a planned schedule determined by the absorption properties of the filter components. Hence the temporary absorbable vascular filter obviates the long term complications of permanent IVC filters such as increased deep vein thrombosis, neighboring organ puncture from filter fracture and embolization while also circumventing the removal requirement of metal retrievable IVC filters.

Claims

1. An absorbable filter stent comprising:

a circumferential element comprising the stent for attaching or securing the filter to a vessel; and

a plurality of absorbable capture elements affixed to the circumferential element stent for capturing or retarding substances flowing in a vessel for a limited duration in time.

2-14. -14. (canceled)

15. An absorbable filter stent comprising:

an absorbable circumferential element comprising the stent for attaching or securing the filter to a vessel; and

an absorbable capture basket affixed to the circumferential element stent for capturing or retarding substances flowing in a vessel for a limited duration in time.

16. The filter stent of claim 15, wherein the capture basket is fabricated from materials selected from the group consisting of polypropylene, polypropylene encapsulated in polydioxanone, polypropylene co-knitted with polyglycolic acid fibers, polyethylene terephathalate, ePTFE, polydioxanone, polytrimethylene carbonate, polyglactin, polyglycolic acid, poly L lactic acid, poliglecaprone, polyglytone, and polylacticoglycolic acid.

17. The filter stent of claim 15, wherein the capture basket is a biocompatible mesh.

18. The filter stent of claim 15, wherein the capture basket is fabricated from a biocompatible mesh selected from the group consisting of polypropylene, polypropylene encapsulated by polydioxanone, polypropylene co-knitted with polyglycolic acid fibers, polyethylene terephathalate, and ePTFE.

22. The filter stent of claim 15, wherein the circumferential element is fabricated of absorbable materials selected from the group consisting of polydioxanone, polytrimethylene carbonate, polyglactin, polyglycolic acid, poly L lactic acid, poliglecaprone, polyglytone, or polylacticoglycolic acid.

23. The filter stent of claim 15, wherein the circumferential element comprises an anchor element or barb for attachment to a vessel.

24. The filter stent of claim 15, wherein the circumferential element and/or capture basket contains a bioactive surface for anticoagulation.

19-21. -21. (canceled)

25. (canceled)

26. An absorbable filter comprising a braided circumferential element fabricated from absorbable material for attaching or securing the filter to a vessel that is integrated with an absorbable capture basket for capturing or retarding substances flowing in a vessel for a limited duration in time.

27. The filter of claim 26 wherein the braided circumferential element and capture basket are constructed of a single, continuous absorbable filament.

28. The filter of claim 26 wherein the braided circumferential element and capture basket are constructed of a plurality of absorbable filaments.

29. The filter of claim 26, wherein the integrated circumferential element and capture basket are fabricated from absorbable materials selected from the group consisting of polydioxanone, polytrimethylene carbonate, polyglactin, polyglycolic acid, poly L lactic acid, poliglecaprone, polyglytone, and polylacticoglycolic acid.

30. The filter of claim 26, wherein the braided circumferential element is braided to offer diametrically expandable and compressible tubular characteristics to accommodate minimally invasive deployment via a catheter.

31. The filter of claim 26 wherein the radial force of the braided circumferential element exerted on the vessel lumen is selected based on the angle of intersection with the braided elements comprising the circumferential element, material composition and size, and/or the outer diameter of the circumferential element.

32. The filter of claim 26 wherein the capture basket is formed by sequentially interlocking loops from adjacent loops distal to the circumferential element and extending loops to the apex in a periodic manner to form a conical capture basket with filter resolution determined by the periodicity of the braid.

33. The filter of claim 26, wherein the circumferential element and/or capture basket contains a bioactive surface for anticoagulation.

34. A method for delivering a filter as claimed in 1, 15, or 26 with a delivery catheter wherein the delivery comprises

inserting the filter, in compressed form, within a delivery catheter to a desired position within a vessel;

and

deploying the filter in expanded form at the desired position within a vessel; and

subsequently removing delivery catheter from the vessel.