Interventional device

• US 20020068895A1
• Filed: 11/27/2001
• Published: 06/06/2002
• Est. Priority Date: 12/10/1999
• Status: Active Grant

• Current Assignee: Sprite Solutions
• Original Assignee: Sprite Solutions
• Inventors: Beck, Robert C.
• Granted Patent: US 7,494,484 B2
• Time in Patent Office: Days
• US Class Current: 604/43
• 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 17/221 Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions surgical snare instruments A61B17/32056
• CPC Class Codes: A61B 17/32037 for removing obstructions from inner organs or blood vessels, e.g. for atherectomy
• CPC Class Codes: A61B 17/320758 with a rotating cutting instrument, e.g. motor driven A61B17/320725, A61B17/32075 and A61B17/320783 take precedence; for removing intra-ocular material A61F9/00763; endoscopic rotatable cutting instruments A61B17/32002
• CPC Class Codes: A61B 18/245 for removing obstructions in blood vessels or calculi

Abstract

The present invention relates to an interventional device for interacting with occlusive material. A wall attachment jet moves and removes particulate from lumens such as vessels.

Claims

1. An interventional device comprising:

an elongate body, having a distal end and a proximal end, and having at least one internal lumen within said body for supplying fluid, said fluid supplied being called a primary fluid;

a cap and a nubbin which together define a narrow gap between the nubbin and the cap for directing fluid out of said elongate body at high velocity and at an approximately acute angle with respect to said elongate body;

said nubbin having a nubbin wall located adjacent said gap;

said nubbin wall providing an asymmetrical wall surface exposed to the primary fluid as it emerges from said gap;

whereby a primary fluid exiting the gap attaches to the nubbin wall surface of the nubbin and entrains a secondary flow of fluid which moves in an approximately retrograde direction towards said proximal end.

2. The interventional device of claim 1 further including:

a delivery sheath having a lumen said lumen having a first diameter.

3. The interventional device of claim 2 wherein said nubbin has a second diameter less than said first diameter.

4. The interventional device of claim 3 wherein said gap has a third diameter less than said second diameter, such that said nubbin forms a wall adjacent said gap.

5. The interventional device of claim 2 wherein said sheath and said elongate body may be moved with respect to each other.

6. The interventional device of claim 2 wherein said sheath and said elongate body are fixed with respect to each other.

7. A method of removing particulate debris from an occlusion in a vessel using a catheter assembly comprising:

inserting and advancing a first delivery sheath to a location near the occlusion;

inserting and advancing an interventional device to a location near the occlusion said interventional device of type having;

a gap for introducing a primary fluid flow in said vessel;

a nubbin having a second diameter smaller than said first diameter;

injecting fluid out of said gap while moving said interventional device in said vessel with respect to said delivery catheter.

8. The method of claim 7 wherein said moving step begins near said occlusion and ends after the interventional device enters the delivery sheath.

9. The method of claim 7 wherein said fluid is injected at a first injection pressure above the blood pressure in the vessel and expands to a second exhaust pressure in said delivery catheter where said exhaust pressure is above said blood pressure.

10. An interventional device comprising:

an elongate body having a fluid supply lumen and having an inflation lumen;

a slit located in said elongate body communicating with said fluid supply lumen permitting fluid to emerge from said fluid supply lumen at an angle with respect to said elongate body;

a nubbin located adjacent said slit;

said nubbin providing a wall surface near the slit such that fluid emerging from the slit adheres to the wall of the nubbin and flows along the wall surface;

a balloon located distal of said slit in communication with said inflation lumen.

11. An interventional device comprising:

an elongate body having a fluid supply lumen and having an inflation lumen;

a slit located in said elongate body communicating with said fluid supply lumen permitting fluid to emerge from said fluid supply lumen at an angle with respect to said elongate body;

a nubbin located adjacent said slit;

said nubbin providing a wall surface near the slit such that fluid emerging from the slit adheres to the wall of the nubbin and flows along the wall surface;

a balloon located proximal of said slit in communication with said inflation lumen.

13. The interventional device of claim 12 further comprising:

a second therapy balloon proximal of said first balloon.

14. The interventional device of claim 13 wherein said second therapy balloon is an angioplasty balloon.

15. The interventional device of claim 13 wherein said second therapy balloon is a stent placement balloon.

16. The interventional device of claim 11 wherein said balloon is a stent placement balloon.

17. The interventional device of claim 11 wherein said balloon is an angioplasty balloon.

12. An interventional device comprising:

an elongate body having a fluid supply lumen and having an inflation lumen;

a slit located in said elongate body communicating with said fluid supply lumen permitting fluid to emerge from said fluid supply lumen at an angle with respect to said elongate body;

a balloon located distal of said slit approximately adjacent said slit and said balloon in communication with said inflation lumen;

whereby said balloon provides a wall surface near the slit such that fluid emerging from the slit adheres to the wall of the balloon and flows along the wall surface of the balloon.