Angioplasty Device

• US 20110224708A1
• Filed: 11/18/2009
• Published: 09/15/2011
• Est. Priority Date: 11/19/2008
• Status: Active Grant

• Current Assignee: Nexstep Medical
• Original Assignee: Nexstep Medical
• Inventors: Sarradon, Pierre
• Granted Patent: US 9,248,263 B2
• Time in Patent Office: Days
• US Class Current: 606/159
• CPC Class Codes: A61B 2017/22001 Angioplasty, e.g. PCTA
• CPC Class Codes: A61B 2017/22038 with a guide wire
• CPC Class Codes: A61B 2017/22062 to be filled with liquid
• CPC Class Codes: A61B 2017/22068 Centering
• CPC Class Codes: A61M 2025/0004 having two or more concentrically arranged tubes for forming a concentric catheter system
• CPC Class Codes: A61M 2025/109 having balloons for removing solid matters, e.g. by grasping or scraping plaque, thrombus or other matters that obstruct the flow
• CPC Class Codes: A61M 25/0029 characterized by features relating to least one lumen located at the middle part of the catheter, e.g. slots, flaps, valves, cuffs, apertures, notches, grooves or rapid exchange ports catheter shaft surface irregularities A61M2025/006
• CPC Class Codes: A61M 25/0032 characterized by at least one unconventionally shaped lumen, e.g. polygons, ellipsoids, wedges or shapes comprising concave and convex parts
• CPC Class Codes: A61M 25/007 Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked
• CPC Class Codes: A61M 25/09 Guide wires
• CPC Class Codes: A61M 25/104 used for angioplasty
• CPC Class Codes: A61M 5/007 for contrast media

Abstract

The invention relates to an angioplasty device for treating stenoses or occlusions that facilitates the diagnosis and visualisation of the stenosis and the treatment control having a duct dedicated to the injection of the contrast product.

Claims

1. An angioplasty device comprising:

a guide wire to be inserted into a blood vessel, and

a flexible tubular body extending along a longitudinal axis between a proximal end and a distal end and having a proximal part, which includes the proximal end, and a distal part, which includes the distal end, the tubular body comprising;

an inflatable balloon arranged radially about the tubular body in the distal part;

a first leaktight internal conduit extending parallel to the longitudinal axis at least in the distal part, so as to permit the insertion of the guide wire into the first conduit and the sliding of the tubular body along the guide wire;

at least a second internal conduit extending parallel to the longitudinal axis and opening out, on the one hand, at the proximal end and, on the other hand, into the balloon in such a way as to permit the injection of a fluid into the balloon;

one or more injection orifices situated in the distal part; and

a third internal conduit opening out, on the one hand, at the proximal end and, on the other hand, into the one or more injection orifices, in such a way as to permit the injection of a contrast agent through the one or more injection orifices when the guide wire is in the first conduit.

2. The angioplasty device of claim 1, wherein each of the first, second and third conduits is leaktight.

3. The angioplasty device of claim 1, wherein the injection orifices are distributed radially about the tubular body.

4. The angioplasty device of claim 1, wherein the one or more injection orifices include at least one downstream injection orifice situated downstream from the balloon.

5. The angioplasty device of claim 1, wherein the one or more injection orifices include at least one upstream injection orifice situated upstream from the balloon.

6. The angioplasty device of claim 1, wherein the first, second and third conduits are concentric.

7. The angioplasty device of claim 1, wherein the first, second and third conduits are arranged side by side.

8. The angioplasty device of claim 1, wherein the first conduit is of circular cross section and has a diameter substantially equal to that of the guide wire.

9. The angioplasty device of claim 1, wherein the first conduit is open radially on the third conduit.

10. The angioplasty device of claim 1, wherein the proximal end of the device is provided with three connector pieces, each connector piece being attached in a leaktight manner to one of the conduits.

11. The angioplasty device of claim 1, wherein the first conduit opens out, on the one hand, at the proximal end and, on the other hand, at the distal end.

12. The angioplasty device of claim 1, wherein the first conduit opens out, on the one hand, at an intermediate position between the proximal end and the distal end and, on the other hand, at the distal end.

13. An angioplasty device comprising:

a guide wire to be inserted into a blood vessel, and

a flexible tubular body extending along a longitudinal axis between a proximal end and a distal end and having a proximal part, which includes the proximal end, and a distal part, which includes the distal end, the distal part being provided with an inflatable balloon arranged radially about the tubular body, the tubular body comprising;

a first leaktight internal conduit extending parallel to the longitudinal axis at least in the distal part, for inserting the guide wire into the first conduit such that the tubular body is slidable along the guide wire and insertable into the blood vessel;

at least a second internal conduit extending parallel to the longitudinal axis and opening out, on the one hand, at the proximal end and, on the other hand, into the inflatable balloon for injecting a fluid into the balloon so as to inflate the balloon and increase a diameter of an internal lumen of the blood vessel after insertion of the tubular body into the blood vessel; and

a third internal conduit opening out, on the one hand, at the proximal end and, on the other hand, into one or more injection orifices situated in the distal part, for injecting a contrast agent through the one or more injection orifices when the guide wire is in the first conduit, the one or more injection orifices including at least one downstream injection orifice situated downstream from the balloon and at least one upstream injection orifice situated upstream from the balloon.

14. The angioplasty device of claim 13, wherein each of the first, second and third conduits is leaktight.

15. The angioplasty device of claim 13, wherein the injection orifices are distributed radially about the tubular body.

16. The angioplasty device of claim 13, wherein the first, second and third conduits are concentric.

17. The angioplasty device of claim 13, wherein the first, second and third conduits are arranged side by side.

18. The angioplasty device of claim 13, wherein the first conduit is of circular cross section and has a diameter substantially equal to that of the guide wire.

19. The angioplasty device of claim 13, wherein the first conduit is open radially on the third conduit.

20. The angioplasty device of claim 13, wherein the proximal end of the device is provided with three connector pieces, each connector piece being attached in a leaktight manner to one of the conduits.

21. The angioplasty device of claim 13, wherein the first conduit opens out, on the one hand, at the proximal end and, on the other hand, at the distal end.

22. The angioplasty device of claim 13, wherein the first conduit opens out, on the one hand, at an intermediate position between the proximal end and the distal end and, on the other hand, at the distal end.

23. A method for local widening of a stenosis of a blood vessel including atheromatous deposits on the walls of the blood vessel narrowing an internal lumen of the blood vessel, the method comprising:

inserting a catheter into the blood vessel;

injecting a contrast agent into the blood vessel;

locating the stenosis;

introducing a guide wire into the blood vessel;

inserting a flexible tubular body having a distal part provided with an inflatable balloon, by sliding a first conduit of the flexible tubular body over the guide wire;

placing the balloon in the area of the stenosis;

inflating the balloon via a second conduit of the flexible tubular body until the atheromatous deposits are compressed against the walls of the blood vessel and the diameter of the internal lumen of the vessel increases;

deflating the balloon via the second conduit;

injecting a contrast agent into the patient'"'"'s blood via a third conduit of the flexible tubular body opening out into one or more injection orifices situated in the distal part of the flexible tubular body without removing the flexible tubular body;

visualizing the blood vessel and checking that the narrowed segment has indeed been rectified.

24. The method of claim 23 further comprising:

detecting with the aid of the contrast agent a remaining narrowed portion;

moving the balloon to reposition the balloon in an area of the remaining narrowed portion;

re-inflating the balloon; and

checking whether that the remaining narrowed portion has been rectified.