Forwardly directed fluid jet crossing catheter

• US 20080312672A1
• Filed: 01/22/2008
• Published: 12/18/2008
• Est. Priority Date: 06/12/2007
• Status: Active Grant

• Current Assignee: Boston Scientific Medical Device Limited (Boston Scientific Corporation)
• Original Assignee: Possis Medical, Inc. (Bayer AG)
• Inventors: Morris, David B., Bonnette, Michael J., Thor, Eric J.
• Granted Patent: US 8,974,418 B2
• Time in Patent Office: Days
• US Class Current: 606/159
• CPC Class Codes: A61B 17/32037 for removing obstructions from inner organs or blood vessels, e.g. for atherectomy
• CPC Class Codes: A61B 2017/32032 using cavitation of the fluid

Abstract

The present invention provides a forwardly directed fluid jet crossing catheter having a distally directed cylindrical flow fluid jet stream to cross a chronic total occlusion. The distal end of the device includes a formable catheter tip region having flexible internal components. Low and high pressure cavities are formed substantially by joined proximal and distal catheter tubes having an adhesive plug seal in common therebetween which partially defines one end of each of the low pressure and high pressure cavities. A guidewire tube and a high pressure tube are aligned along and within the low pressure and high pressure cavities and through the adhesive plug seal. The high pressure tube openly terminates in the high pressure cavity, whereby pressurized fluid transfers from the high pressure cavity in the guidewire tube entry hole to subsequently pass along the guidewire lumen and co-located guidewire to exit as a cylindrical fluid jet stream.

Claims

1. A forwardly directed fluid jet crossing catheter comprising a manifold and a flexible elongated catheter tube, said manifold having a substantially straight tubular section and an off-line tubular section, said substantially straight tubular section having a proximal end and a distal end, said off-line tubular section being connected between said proximal and distal ends of said substantially straight tubular section, said flexible elongated catheter tube having a proximal end and a distal end, said flexible elongated catheter tube being connected through said distal end of said substantially straight tubular section, said flexible catheter tube having a flexible hollow tapered tip attached to said distal end of said flexible elongated catheter tube, said hollow tapered tip having a proximal end and a distal end, said proximal end of said hollow tapered tip being attached to said distal end of said flexible elongated catheter tube, a flexible elongated guide wire tube extending internally from near said proximal end of said substantially straight tubular section, through said flexible elongated catheter tube, to said distal end of said hollow tapered tip, a flexible elongated high pressure tube extending internally from said off-line tubular section, through said substantially straight tubular section of said manifold, through said flexible elongated catheter tube, to a distance short of said distal end of said flexible elongated catheter tube, said elongated high pressure tube having a proximal end and a distal end, and said elongated guide wire tube having a fluid entry hole therein adjacent to said distal end of said elongated high pressure tube.

2. The forwardly directed fluid jet crossing catheter of claim 1, wherein said off-line tubular section is connected to said substantially straight tubular section at an acute angle.

3. The forwardly directed fluid jet crossing catheter of claim 1, wherein said flexible elongated catheter tube has an elongated proximal section and an elongated distal section between said distal end of said substantially straight tubular section of said manifold and said proximal end of said hollow tapered tip and an internal plug seal separating said proximal and distal sections of said flexible elongated catheter tube.

4. The forwardly directed fluid jet crossing catheter of claim 1, wherein said distal end of said substantially straight tubular section of said manifold has a strain relief tube attached thereto and through which said flexible elongated catheter tube passes.

5. The forwardly directed fluid jet crossing catheter of claim 1, wherein said off-line tubular section of said manifold has a ferrule therein for securing said proximal end of said elongated high pressure tube.

6. The forwardly directed fluid jet crossing catheter of claim 1, wherein said substantially straight tubular section has an internal means for securing said proximal end of said guide wire tube therein.

7. The forwardly directed fluid jet crossing catheter of claim 6, wherein said internal means includes an adhesive located near said proximal end of said substantially straight tubular section of said manifold.

8. The forwardly directed fluid jet crossing catheter of claim 1, wherein said off-line tubular section of said manifold includes a tubular connector for passing a pressurized fluid into said proximal end of said high pressure tube.

9. The forwardly directed fluid jet crossing catheter of claim 8, wherein said tubular connector is threaded.

10. The forwardly directed fluid jet crossing catheter of claim 3, wherein said proximal end of said substantially straight section of said manifold has a hemostasis valve attached thereto.

11. The forwardly directed fluid jet crossing catheter of claim 1, wherein said flexible elongated catheter tube is made from a braided polymer tubing.

12. The forwardly directed fluid jet crossing catheter of claim 1, wherein said elongated guide wire tube is made from a polyimide.

13. The forwardly directed fluid jet crossing catheter of claim 1, wherein said elongated high pressure tube is made from stainless steel.

14. The forwardly directed fluid jet crossing catheter of claim 3, wherein, during operation of said fluid jet crossing catheter, said elongated proximal section has a low pressure cavity therein and said elongated distal section has a high pressure cavity therein.

15. The forwardly directed fluid jet crossing catheter of claim 3, wherein said elongated guide wire tube and said elongated high pressure tube extend adjacent each other through a portion of said substantially straight tubular section and through said elongated proximal and distal sections of said flexible elongated catheter tube.

16. The forwardly directed fluid jet crossing catheter of claim 10, wherein, during operation of said fluid jet crossing catheter, a pressurized fluid is introduced into said tubular connector to said proximal end of said elongated high pressure tube and a guide wire is inserted through said hemostasis valve, said guide wire being movable forwardly up to and through said distal end of said hollow tapered tip.

17. The forwardly directed fluid jet crossing catheter of claim 16, wherein said guide wire has a proximal end and a distal end, said distal end of said guide wire being inserted through said hemostasis valve and movable longitudinally through said elongated guide wire tube in said proximal and longitudinal sections of said flexible elongated catheter tube up to and through said distal end of said hollow tapered tip to provide and control a substantially cylindrical jet stream flow of fluid emanating from said distal end of said hollow tapered tip.

18. The forwardly directed fluid jet crossing catheter of claim 17, wherein a maximum flow of fluid emanates from said distal end of said hollow tapered tip when said distal end of said elongated guide wire is in close proximity thereto.

19. The forwardly directed fluid jet crossing catheter of claim 17, wherein various jet stream velocities are obtainable when said distal end of said elongated guide wire is at various proximal distances from said distal end of said hollow tapered tip.

20. The forwardly directed fluid jet crossing catheter of claim 1, wherein said elongated guide wire has a diameter of approximately 0.014 inch.

21. The forwardly directed fluid jet crossing catheter of claim 3, wherein said elongated proximal section of said flexible elongated catheter tube is a 4 French (4F) catheter tube and said elongated distal section of said flexible elongated catheter tube is a 3 French (3F) catheter tube.

22. The forwardly directed fluid jet crossing catheter of claim 8, wherein said fluid is a saline solution or other suitable solution.

23. The forwardly directed fluid jet crossing catheter of claim 1, wherein said off-line tubular section is connected between a mid-section of said substantially straight tubular section and said proximal end of said substantially straight tubular section.

24. The forwardly directed fluid jet crossing catheter of claim 23, wherein said off-line tubular section is connected to said substantially straight tubular section at an acute angle, said acute angle being directed toward said proximal end of said substantially tubular section.