Ultrasound Energy Delivery Assembly

• US 20110046522A1
• Filed: 08/10/2010
• Published: 02/24/2011
• Est. Priority Date: 08/21/2009
• Status: Abandoned Application

• Current Assignee: Stryker European Operations Holdings, LLC (Stryker Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Kjos, Del, Constantine, David, Vaitekunas, Jeffrey J., Porter, Stephen, Kane, Katie, McFerran, Sean, Forcucci, Steve, Hamm, Mark, Chan, Huey
• Application Number:
  US12/853,706
• Publication Number:
  US 20110046522A1
• Time in Patent Office: Days
• US Class Current: 601/2
• CPC Class Codes: A61B 17/22012 in direct contact with, or very close to, the obstruction or concrement for removing obstructions in blood vessels by laser A61B18/245
• CPC Class Codes: A61B 2017/22014 the ultrasound transducer being outside patient's body; with an ultrasound transmission member; with a wave guide; with a vibrated guide wire not applied in A61B17/22012
• CPC Class Codes: A61B 90/39 Markers, e.g. radio-opaque or breast lesions markers

Abstract

In a first embodiment, an ultrasound energy delivery assembly includes a waveguide and a catheter having a capture member. The capture member extends radially inward from an interior surface of the catheter into a lumen of the catheter and is configured to retain the enlarged distal tip so that the enlarged distal tip is temporarily prevented from moving proximally. In a second embodiment, an ultrasound energy delivery assembly includes a waveguide and a sheath covering at least a portion of the waveguide. In a third embodiment, an ultrasound energy delivery assembly includes a waveguide and a dual lumen catheter having a capture member. In a fourth embodiment, an ultrasound energy delivery assembly includes a waveguide and a catheter having a proximal waveguide lumen and a proximal guide wire lumen that merges with the proximal waveguide lumen at their respective distal ends to form a distal lumen. In a fifth embodiment, an ultrasound energy delivery assembly includes a waveguide and a catheter having a helical spring tip disposed over a distal section of the waveguide. In a sixth embodiment, an ultrasound energy delivery assembly includes a waveguide and a catheter extruded from a material such as expanded polytetrafluoroethylene. The catheter includes a braided layer having a multi-wire braided section and a single wire braided section formed from a braid wire from the multi-wire braided section.

Claims

1. An ultrasound energy delivery assembly, comprising:

a waveguide, comprising;

an active zone configured to deliver ultrasound energy in a radial direction; and

an enlarged distal tip; and

a catheter, comprising;

an inner lubricious layer;

a middle reinforcement layer disposed outside of the inner lubricious layer;

an outer polymer layer disposed outside of the middle reinforcement layer;

an active zone window configured to allow passage of ultrasound energy; and

a capture member extending radially inward from an interior surface of the catheter into a lumen of the catheter, wherein the capture member is configured to retain the enlarged distal tip so that the enlarged distal tip is temporarily prevented from moving proximally.

2. The ultrasound energy delivery assembly of claim 1, the catheter further comprising a closed distal end, wherein the waveguide is prevented from moving distally beyond the closed distal end.

3. The ultrasound energy delivery assembly of claim 1, wherein the waveguide is temporarily secured in the catheter when the waveguide is disposed in the catheter with the enlarged distal tip distal of the capture member.

4. The ultrasound energy delivery assembly of claim 1, wherein the active zone is positioned in the active zone window when the waveguide is disposed in the catheter with the enlarged distal tip distal of the capture member.

5. The ultrasound energy delivery assembly of claim 1, the middle reinforcement layer comprising a first coil having variable pitch.

6. The ultrasound energy delivery assembly of claim 5, the middle reinforcement layer further comprising at least one additional coil disposed radially outside of the first coil.

7. The ultrasound energy delivery assembly of claim 1, the catheter further comprising an axial wire disposed in the outer polymer layer and configured to strengthen the catheter.

8. The ultrasound energy delivery assembly of claim 1, the catheter further comprising at least one additional active zone window.

9. The ultrasound energy delivery assembly of claim 1, the catheter further comprising a guide wire tip disposed on a distal end of the catheter and configured to create an opening for the catheter through a tissue.

10. The ultrasound energy delivery assembly of claim 1, the catheter further comprising a plurality of marker bands.

11. The ultrasound energy delivery assembly of claim 1, further comprising a vacuum device configured to collect and remove clot fragments.

12. An ultrasound energy delivery assembly, comprising:

a waveguide, comprising a waveguide proximal section and a waveguide distal section including an active zone configured to deliver ultrasound energy in a radial direction; and

a sheath covering at least a portion of the waveguide, comprising;

a sheath proximal section secured to the waveguide proximal section;

a sheath distal section configured to cover the waveguide distal section and the active zone; and

an active zone window configured to allow passage of ultrasound energy.

13. The ultrasound energy delivery assembly of claim 12, wherein the sheath proximal section comprises a high density material.

14. The ultrasound energy delivery assembly of claim 12, wherein the sheath distal section comprises a low density material.

15. The ultrasound energy delivery assembly of claim 12, wherein the sheath proximal section comprises a high density material, the sheath distal section comprises a low density material, wherein the respective high density and low density materials are joined end to end.

16. The ultrasound energy delivery assembly of claim 12, the catheter further comprising at least one additional active zone window.

17. The ultrasound energy delivery assembly of claim 12, further comprising a vacuum device configured to collect and remove clot fragments.

18. An ultrasound energy delivery assembly, comprising:

a waveguide, comprising;

an active zone configured to deliver ultrasound energy in a radial direction; and

an enlarged distal tip; and

a catheter, comprising;

a waveguide lumen configured to contain the waveguide, comprising;

a capture member extending radially inward from an interior surface of the catheter into a lumen of the catheter, wherein the capture member is configured to retain the enlarged distal tip so that the enlarged distal tip is temporarily prevented from moving proximally; and

an active zone window configured to allow passage of ultrasound energy; and

a guide wire lumen configured to contain a guide wire.

19. The ultrasound energy delivery assembly of claim 18, the catheter further comprising a plurality of marker bands.

20. The ultrasound energy delivery assembly of claim 18, further comprising a vacuum device configured to collect and remove clot fragments.

21-33. -33. (canceled)