Percutaneous Transluminal Angioplasty Device With Integral Embolic Filter

• US 20070299466A1
• Filed: 06/14/2007
• Published: 12/27/2007
• Est. Priority Date: 11/24/2004
• Status: Active Grant

• Current Assignee: Contego Medical, Inc.
• Original Assignee: Contego Medical, LLC
• Inventors: Sachar, Ravish, Patel, Udayan
• Granted Patent: US 9,707,071 B2
• Time in Patent Office: Days
• US Class Current: 606/200
• CPC Class Codes: A61F 2/013 Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting
• CPC Class Codes: A61F 2002/018 made from tubes or sheets of material, e.g. by etching or laser-cutting
• CPC Class Codes: A61F 2230/0006 circular
• CPC Class Codes: A61F 2230/008 paraboloidal
• CPC Class Codes: A61M 25/104 used for angioplasty

Abstract

A percutaneous transluminal angioplasty device includes an embolic filter mounted to the catheter shaft at a location distal to the angioplasty balloon. Thus the filter is downstream from the blockage and is properly positioned to capture embolic particles that may be set loose into the blood stream as the angioplasty procedure is performed. The embolic filter is normally collapsed against the catheter shaft to facilitate introduction and withdrawal of the device to and from the operative site. Once the angioplasty balloon is properly positioned, however, means operatively associated with the embolic filter are actuated to erect the filter to position a filter mesh across the lumen of the vessel.

Claims

1. (canceled)

12. The apparatus of claim 1, further comprising a filter membrane attached to said scaffolding.

13. The apparatus of claim 12, wherein said filter membrane overlies at least a portion of said scaffolding.

2. An apparatus comprising:

a catheter having an elongated shaft, proximal and distal ends, and a longitudinal axis; and

a filter membrane support structure, comprising;

a first ring coaxially fixedly mounted on a distal portion of said catheter shaft;

a second ring coaxially slidably mounted on a distal portion of said catheter shaft for movement toward and away from said first ring; and

a scaffolding extending between said first and second rings, said scaffolding comprising;

first longitudinal connecting members having a first end attached to said first ring and a second end extending toward said second ring;

second longitudinal connecting members having a first end attached to said second ring and a second end extending toward said first ring;

each of said first and second longitudinal connecting members having a bifurcation formed on said second end thereof, each of said bifurcations comprising first and second branches; and

means for connecting a branch on each of said first longitudinal connecting members to a branch on an opposite one of said second longitudinal connecting members.

3. The apparatus of claim 2, further comprising points of weakness formed on the scaffolding to facilitate controlled bending.

4. The apparatus of claim 3, wherein said points of weakness comprise regions of reduced cross-sectional area.

5. The apparatus of claim 3, wherein said points of weakness comprise curvilinear cutouts.

6. The apparatus of claim 3, wherein said points of weakness include points of weakness formed at the connection points between the bifurcations and the longitudinal connecting members.

7. The apparatus of claim 3, wherein said points of weakness include points of weakness formed at the connection points between the first end of said longitudinal connecting members and a corresponding one of said rings.

8. The apparatus of claim 3, wherein said points of weakness include said branches of said bifurcations.

9. The apparatus of claim 2, wherein said second longitudinal connecting members are circumferentially offset with respect to said first longitudinal connecting members.

10. The apparatus of claim 2, wherein said means for connecting a branch on each of said first longitudinal connecting members to a branch on an opposite one of said second longitudinal connecting members comprises intermediate connecting members, each having a first end coupled to a branch on a first longitudinal connecting member and a second end coupled to a branch on a second longitudinal connecting member.

11. The apparatus of claim 10, wherein said intermediate connecting members each comprise a plurality of linkages.