Catheter having echogenicity enhancement

• US 5,967,988 A
• Filed: 04/08/1998
• Issued: 10/19/1999
• Est. Priority Date: 04/08/1998
• Status: Expired due to Term

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Briscoe, Roderick E., Goforth, Philip T.
• Primary Examiner(s): Jaworski, Francis J.
• Application Number:
  US09/057,321
• Time in Patent Office: 559 Days
• Field of Search: 600/458, 604/437, 604/264, 604/272, 604/96-101, 128/898
• US Class Current: 600/458
• CPC Class Codes: A61B 2090/3925 ultrasonic
• CPC Class Codes: A61M 25/01 Introducing, guiding, advancing, emplacing or holding catheters A61M25/10 takes precedence
• CPC Class Codes: A61M 25/0108 using radio-opaque or ultrasound markers

Abstract

An improved retrograde coronary sinus perfusion catheter includes a flexible, tubular catheter body and an inflatable balloon. The catheter body has proximal and distal ends and an interior lumen. The inflatable balloon is located adjacent the distal end of the catheter body and has proximal and distal edges. The improvement includes an echogenicity enhancement embedded within the catheter body. The echogenicity enhancement is adapted to reflect ultrasonic waves at a characteristic different from the catheter body.

Claims

1. An improved retrograde coronary sinus perfusion catheter including a flexible, tubular catheter body and an inflatable balloon, the catheter body having a proximal end, a distal end and an interior lumen, the inflatable balloon being located adjacent the distal end of the catheter body and having a proximal edge and a distal edge, the improvement comprising an echogenicity enhancement embedded within the catheter body, the echogenicity enhancement adapted to reflect ultrasonic waves at a characteristic different from the catheter body wherein the echogenicity enhancement is located in a secondary lumen proximate the distal end of the catheter body.

2. The improved retrograde coronary sinus perfusion catheter according to claim 1, wherein the echogenicity enhancement is embedded between an outer surface and an inner surface of the catheter body, the inner surface defining the interior lumen.

3. The improved retrograde coronary sinus perfusion catheter according to claim 1, wherein the echogenicity enhancement includes a plurality of concave members.

4. The improved retrograde coronary sinus perfusion catheter according to claim 1, wherein the echogenicity enhancement includes a plurality of convex members.

5. The improved retrograde coronary sinus perfusion catheter according to claim 1, wherein the echogenicity enhancement includes a series of alternating convex and concave members.

6. The improved retrograde coronary sinus perfusion catheter according to claim 1, wherein the echogenicity enhancement includes an elongate member.

7. The improved retrograde coronary sinus perfusion catheter according to claim 6, wherein the elongate member has a plurality of annular grooves formed therein, the plurality of annular grooves having truncated V-shape.

8. The improved retrograde coronary sinus perfusion catheter according to claim 6, wherein the elongate member has a continuous spiral groove formed therein.

9. The improved retrograde coronary sinus perfusion catheter according to claim 6, wherein the elongate member has a reduced diameter portion and a coiled wire disposed about the reduced diameter portion.

10. The improved retrograde coronary sinus perfusion catheter according to claim 6, wherein the elongate member has a plurality of longitudinal grooves formed therein.

11. The improved retrograde coronary sinus perfusion catheter according to claim 6, wherein the elongate member has a cross-hatch pattern.

12. The improved retrograde coronary sinus perfusion catheter according to claim 6, wherein the elongate member has a hexagonal cross-sectional shape.

13. The improved retrograde coronary sinus perfusion catheter according to claim 6, wherein the elongate member has a cruciate cross-sectional shape.

14. The improved retrograde coronary sinus perfusion catheter according to claim 1, wherein the echogenicity enhancement includes a plurality of campanulate members.

15. The improved retrograde coronary sinus perfusion catheter according to claim 1, wherein the echogenicity enhancement is located proximate at least one of the proximal and distal edges of the inflatable balloon.

16. The improved retrograde coronary sinus perfusion catheter according to claim 1, wherein a plurality of echogenicity enhancements are located at spaced intervals along the catheter body.

17. The improved retrograde coronary sinus perfusion catheter according to claim 1, wherein the echogenicity enhancement includes a radiopaque material.

18. The improved retrograde coronary sinus perfusion catheter according to claim 17, wherein the radiopaque material includes stainless steel.

19. The improved retrograde coronary sinus perfusion catheter according to claim 1, wherein the echogenicity enhancement is secured to the catheter body by an adhesive.

20. The improved retrograde coronary sinus perfusion catheter according to claim 19, wherein the adhesive is a silicone adhesive.

21. A method for positioning a cardioplegia catheter in a vascular system of a body, the method comprising the steps of:

providing a cardioplegia catheter including a catheter body having a proximal end, a distal end and an interior lumen, the catheter further including an echogenicity enhancement located between an outer surface and an inner surface of the lumen proximate the distal end of the catheter body, the inner surface defining the interior of the lumen, the echogenicity enhancement being located within a secondary lumen, and the catheter including an inflatable balloon;

inserting the distal end of the catheter into the coronary sinus;

detecting the location of the catheter within the vascular system using an ultrasonic pulse-echo imaging system, the echogenicity enhancement reflecting ultrasonic waves from the ultrasonic pulse-echo imaging system at a characteristic different from the catheter body; and

positioning the inflatable balloon in a sinus ostium to seal the coronary sinus.

22. The method for positioning a catheter according to claim 21, wherein the inflatable balloon has a proximal edge and a distal edge, and the echogenicity enhancement is located proximate at least one of the proximal and distal edges.

23. The method for positioning a catheter according to claim 21, wherein the echogenicity enhancement includes a plurality of concave members.

24. The method for positioning a catheter according to claim 21, wherein the echogenicity enhancement includes a plurality of convex members.

25. The method for positioning a catheter according to claim 21, wherein the echogenicity enhancement includes an elongate member having a groove formed therein.

26. The method for positioning a catheter according to claim 25, wherein the elongate member has a plurality of annular grooves, the plurality of annular grooves having a truncated V-shape.

27. The method for positioning a catheter according to claim 25, wherein the groove is a continuous spiral groove.

28. The method for positioning a catheter according to claim 25, wherein the elongate member has a plurality of longitudinal grooves.

29. The method for positioning a catheter according to claim 21, wherein the echogenicity enhancement includes a plurality of campanulate members.

30. The method for positioning a catheter according to claim 21, wherein a plurality of echogenicity enhancements are located at spaced intervals along the catheter body.

31. The method for positioning a catheter according to claim 21, wherein the echogenicity enhancement includes a radiopaque material.