Filters with echogenic characteristics

• US 10,426,590 B2
• Filed: 03/14/2014
• Issued: 10/01/2019
• Est. Priority Date: 03/14/2013
• Status: Active Grant

• Current Assignee: Volcano Corporation (Koninklijke Philips N.V.)
• Original Assignee: Volcano Corporation (Koninklijke Philips N.V.)
• Inventors: Johnson, Eric, Stigall, Jeremy
• Primary Examiner(s): Nguyen, Vi X
• Application Number:
  US14/773,440
• Publication Number:
  US 20160015507A1
• Time in Patent Office: 2,027 Days
• CPC Class Codes: A61B 2090/3784 both receiver and transmitter being in the instrument or receiver being also transmitter
• CPC Class Codes: A61B 2090/3925 ultrasonic
• CPC Class Codes: A61B 2090/3966 Radiopaque markers visible in an X-ray image
• CPC Class Codes: A61B 2090/3995 Multi-modality markers
• CPC Class Codes: A61B 34/20 Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
• CPC Class Codes: A61B 8/0833 involving detecting or locating foreign bodies or organic structures
• CPC Class Codes: A61B 90/39 Markers, e.g. radio-opaque or breast lesions markers
• CPC Class Codes: A61B 90/96 using barcodes
• CPC Class Codes: A61F 2/0105 Open ended, i.e. legs gathered only at one side
• CPC Class Codes: A61F 2/011 Instruments for their placement or removal
• CPC Class Codes: A61F 2002/016 made from wire-like elements
• CPC Class Codes: A61F 2002/018 made from tubes or sheets of material, e.g. by etching or laser-cutting
• CPC Class Codes: A61F 2250/0096 Markers and sensors for detecting a position or changes of a position of an implant, e.g. RF sensors, ultrasound markers

Abstract

There are described a variety of intravascular filters have wherein at least a portion of the filter has been modified to provide an enhanced echogenic characteristic of the filter.

Claims

1. A filter comprising:

a hub; and

a plurality of legs or wires or segments extending from the hub;

wherein the plurality of legs or wires or segments comprise a first section having a first pattern of voids formed therein to provide an enhanced echogenic characteristic of the first section and a second section having a second pattern of voids formed therein to provide an enhanced echogenic characteristic of the second section, wherein the first pattern of voids is different than the second pattern of voids.

2. The filter of claim 1 wherein the first pattern of voids is filled with air.

3. The filter of claim 2 wherein the second pattern of voids is filled with air.

4. The filter of claim 2 wherein the second pattern of voids is filled with an echogenic material.

5. The filter of claim 1 wherein the first pattern of voids is filled with an echogenic material.

6. The filter of claim 1 wherein the first pattern of voids are air bubbles formed within the first section.

7. The filter of claim 1 wherein the first pattern of voids are air bubbles formed within an ePTFE material forming the first section of the portion of one or more of the legs or wires or segments.

8. The filter of claim 1 wherein the first pattern of voids is scaled to a suitable size, shape and orientation for use with an intravascular ultrasound system.

9. The filter of claim 1 further comprising at least one fixation element and wherein the fixation element comprises a third pattern of voids to provide an enhanced echogenic characteristic of the at least one fixation element or the filter.

10. A filter comprising:

a hub; and

a plurality of segments extending from the hub, wherein a first of the plurality of segments comprises a first pattern of voids formed therein to provide an enhanced echogenic characteristic of the first of the plurality of segments, wherein a second of the plurality of segments comprises a second pattern of voids formed therein to provide an enhanced echogenic characteristic of the second of the plurality of segments, wherein the first pattern is different than the second pattern.

11. The filter of claim 10 wherein the first pattern of voids comprise an air gap formed in the first segment.

12. The filter of claim 11 wherein the second pattern of voids comprises an air gap formed in the second segment.

13. The filter of claim 11 wherein the second pattern of voids is filled with an echogenic material.

14. The filter of claim 10 wherein the first pattern of voids comprise a gap formed in the first segment, wherein the gap is filled with an echogenic material.

15. The filter of claim 10 wherein the first pattern of voids comprises an air pocket in an ePTFE material.