Biodegradable filter and support frame

Patent metadata

Field	Value
Publication number	US-2016175084-A1
Application number	US-201514958244-A
Country	US
Kind code	A1
Filing date	Dec 3, 2015
Priority date	Dec 19, 2014
Publication date	Jun 23, 2016
Grant date	—

Abstract

A endoluminal filter can have a support structure or frame made of a biodegradable metal, such as magnesium or a magnesium alloy, and a material capture structure can be made of a biodegradable polymer, such as PLA, PGA, or PLGA.

First claim

What is claimed is:

1 . An endoluminal filter, the filter comprising:
a first support member having a first end and a second end; a second support member attached to the first end of the first support member or the second end of the first support member and forming a crossover with the first support member; and a material capture structure extending between the first and second support members, the crossover and the first end or the second end of the first support member; wherein the first support member and the second support member are made of a biodegradable metal.

2 . The endoluminal filter of claim 1 , wherein the biodegradable metal is magnesium or a magnesium alloy.

3 . The endoluminal filter of claim 1 , wherein the biodegradable metal is iron or an iron alloy.

4 . The endoluminal filter of claim 1 , wherein the material capture structure is made of a biodegradable polymer or a biodegradable metal.

5 . The endoluminal filter of claim 1 , wherein the biodegradable metal degrades within the body within about 3 months.

6 . The endoluminal filter of claim 1 , wherein the biodegradable metal degrades within the body within about 6 months.

7 . The endoluminal filter of claim 5 , wherein the material capture structure degrades within the body within about one month.

8 . The endoluminal filter of claim 1 , wherein the first support member and the second support member take about two to three times longer to degrade than the material capture structure.

9 . The endoluminal filter of claim 1 , wherein the first support member and the second support member have a predetermined rate of degradation that depends at least in part on the metal alloy composition.

10 . The endoluminal filter of claim 1 , wherein the first support member and the second support member have a predetermined rate of degradation that depends at least in part on the thickness of the first support member and the thickness of the second support member.

11 . The endoluminal filter of claim 10 , wherein the material capture structure has a variable thickness that results in a predetermined rate of degradation for the material capture structure.

12 . An endoluminal filter, the filter comprising:
a frame comprising a plurality of elongate members; and a plurality of biodegradable anchor elements attached to the frame, wherein the anchors are configured to degrade before the frame.

13 . The endoluminal filter of claim 12 , wherein the elongate members form a movable crossover.

14 . The endoluminal filter of claim 12 , wherein the biodegradable anchor elements are made of a biodegradable metal.

15 . The endoluminal filter of claim 12 , wherein the biodegradable anchors are configured to degrade after the frame is incorporated into a lumen wall.

16 . The endoluminal filter of claim 12 , further comprising a material capture structure disposed across the frame.

17 . The endoluminal filter of claim 12 , wherein the plurality of elongate members are made of a biodegradable magnesium alloy.

18 . The endoluminal filter of claim 17 , wherein the frame has a rate of degradation that is about two to three times longer than the rate of degradation of the material capture structure.

19 . A method of filtering embolic material from a blood vessel, the method comprising:
placing a biodegradable filter into the inferior vena cava, the biodegradable filter comprising a biodegradable metal frame; filtering the inferior vena cava of embolic material with the biodegradable filter for at least a predetermined amount of time; and stopping filtration of the inferior vena cava after the predetermined amount of time has elapsed by allowing the biodegradable filter to degrade within the inferior vena cava.

20 . The method of claim 19 , further comprising allowing the metal frame of the biodegradable filter to become incorporated into the inferior vena cava wall.

21 . The method of claim 19 , wherein the biodegradable filter further comprises a biodegradable material capture structure disposed across the metal frame.

22 . The method of claim 21 , wherein the biodegradable material capture structures degrades more rapidly than biodegradable metal frame.

23 . A method of filtering embolic material from a blood vessel, the method comprising:
placing a filter into the inferior vena cava, the filter comprising a frame and a plurality of biodegradable anchors; filtering the inferior vena cava of embolic material with the filter; and removing the plurality of biodegradable anchors from the filter by allowing the plurality of biodegradable anchors to degrade within the inferior vena cave.

24 . The method of claim 23 , further comprising allowing the frame of the filter to become incorporated into the inferior vena cava wall before the step of removing the plurality of biodegradable anchors.

25 . The method of claim 24 , further comprising retrieving the filter from the inferior vena cava after the step of removing the plurality of biodegradable anchors.

Assignees

• Volcano Corp

Inventors

• Johnson Eric
• Stigall Jeremy

Classifications

• A61F2002/016

  made from wire-like elements · CPC title

• A61F2250/003

  differing in adsorbability or resorbability, i.e. in adsorption or resorption time · CPC title

• A61F2210/0004

  bioabsorbable · CPC title

• A61F2/013 Primary

  Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting · CPC title

• A61F2/0103 Primary

  With centering means · CPC title