IP Library › Granted Patent US 12,245,782
Granted Patent B2
US 12,245,782 · App. 18/755,486 · Granted Mar 11, 2025

Shock wave electrodes

Inventors: Hoa D. Nguyen (San Jose, CA); John M. Adams (Snohomish, WA)
Assignee: SHOCKWAVE MEDICAL, INC.
A61B17/2202A61B17/22022A61B2017/22001A61B2017/22021A61B2017/22025A61B2017/22061
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Quick Facts
Patent No.
US 12,245,782
App. No.
18/755,486
Granted
Mar 11, 2025
Kind
B2
Abstract

Disclosed herein shock wave catheters comprising one or more shock wave electrodes for cracking calcifications located within blood vessels. In some variations, a shock wave catheter has first and second shock wave electrodes each circumferentially disposed over the outer surface of the catheter. In certain variations, the first electrode has a recess and the second electrode has a protrusion that is received by the recess and a spark gap is located along the separation between the recess and the protrusion. The second electrode can also have a recess that receives a protrusion from a third shock wave electrode, where the separation between the second and third electrodes along the separation between the recess and the protrusion forms a second spark gap. A shock wave can be initiated across these spark gaps when a voltage is applied over the electrodes.

Claims (54)

1. A treatment catheter comprising:

an axially extending elongate member;

a first cylindrical conductive band mounted on the elongate member;

a second cylindrical conductive band mounted on the elongate member in a distal position relative to the first cylindrical conductive band and arranged such that longitudinal spacing between the first cylindrical conductive band and the second cylindrical conductive band defines at least one spark gap between the first and second cylindrical conductive bands;

a first wire having a first end electrically connectable to a voltage source and having a second end in electrical communication with the first cylindrical conductive band;

a second wire having a first end electrically connectable to the voltage source and having a second end in electrical communication with the second cylindrical conductive band; and

a tube connected to the elongate member and surrounding the first and second cylindrical conductive bands, the tube being fillable with a conductive liquid,

wherein the first and second cylindrical conductive bands are configured such that a voltage pulse applied across the first and second wires causes a current to flow across the spark gap between the first and second cylindrical conductive bands and generate a shock wave in the liquid.

2. The catheter of claim 1 , wherein the distal end of the first cylindrical conductive band comprises a circumferential side edge.

3. The catheter of claim 1 , wherein the proximal end of the second cylindrical conductive band comprises a circumferential side edge.

4. The catheter of claim 1 , wherein the distal end of the first cylindrical conductive band and the proximal end of the second cylindrical conductive band are located along the same cylindrical layer.

5. The catheter of claim 1 , wherein either or both of the first cylindrical conductive band and the second cylindrical conductive band are formed from a hypotube.

6. The catheter of claim 1 , further comprising:

a third cylindrical conductive band, positioned distal to the second cylindrical conductive band, and a third wire electrically connecting the third cylindrical conductive band to the voltage source;

a fourth cylindrical conductive band, positioned distal to the third cylindrical conductive band and arranged such that spacing between the third cylindrical conductive band and the fourth cylindrical conductive band defines a second spark gap, and a fourth wire electrically connecting the fourth cylindrical conductive band to the voltage source,

wherein when a voltage pulse is applied across the third and fourth wires, current will flow across the second spark gap and generate a shock wave in the liquid.

7. The catheter of claim 6 , wherein a distal end of the third cylindrical conductive band comprises a circumferential side edge.

8. The catheter of claim 6 , wherein a proximal end of the fourth cylindrical conductive band comprises a circumferential side edge.

9. The catheter of claim 6 , wherein the distal end of the third cylindrical conductive band and the proximal end of the fourth cylindrical conductive band are located along the same cylindrical layer.

10. The catheter of claim 6 , further comprising:

a fifth cylindrical conductive band, positioned distal to the fourth cylindrical conductive band, and a fifth wire electrically connecting the fifth cylindrical band to the voltage source;

a sixth cylindrical conductive band, positioned distal to the fifth cylindrical conductive band and arranged such that spacing between the fifth cylindrical conductive band and the sixth cylindrical conductive band defines a third spark gap, and a sixth wire electrically connecting the sixth cylindrical conductive band to the voltage source,

wherein when a voltage pulse is applied across the fifth and sixth wires, current will flow across the third spark gap and generate a shock wave in the liquid.

11. The catheter of claim 10 , further comprising:

a seventh cylindrical conductive band, positioned distal to the sixth cylindrical conductive band, and a seventh wire electrically connecting the seventh cylindrical conductive band to the voltage source;

an eighth cylindrical conductive band, positioned distal to the seventh cylindrical conductive band and arranged such that spacing between the seventh cylindrical conductive band and the eighth cylindrical conductive band defines a fourth spark gap, and an eighth wire electrically connecting the eighth cylindrical conductive band to the voltage source,

wherein when a voltage pulse is applied across the seventh and eighth wires, current will flow across the fourth spark gap and generate a shock wave in the liquid.

12. A treatment catheter comprising:

an axially extending elongate member;

a first cylindrical conductive band mounted on the elongate member;

a second cylindrical conductive band mounted on the elongate member in a distal position relative to the first cylindrical conductive band, and arranged such that longitudinal spacing between the first cylindrical conductive band and the second cylindrical conductive band defines a first spark gap between the first and second cylindrical conductive bands;

a third cylindrical conductive band mounted on the elongate member in a distal position relative to the second cylindrical conductive band, and arranged such that longitudinal spacing between the second cylindrical conductive band and the third cylindrical conductive band defines a second spark gap between the second and third cylindrical conductive bands;

a first wire having a first end electrically connectable to a voltage source and having a second end in electrical communication with the first cylindrical conductive band;

a second wire having a first end electrically connectable to the voltage source and having a second end in electrical communication with the third cylindrical conductive band; and

a tube connected to the elongate member and surrounding the first, second, and third cylindrical bands, the tube being fillable with a conductive liquid, wherein the first, second, and third conductive bands are configured such that a voltage pulse applied across the first and second wires causes a current to flow across the first spark gap between the first and second cylindrical conductive bands and across the second spark gap between the second and third cylindrical conductive bands and generate shock waves in the liquid originating from the locations of both the first spark gap and the second spark gap.

13. The catheter of claim 12 , wherein a distal end of the first cylindrical band and a proximal end of the second cylindrical band are located along the same cylindrical layer and the distal end of the second cylindrical band and the proximal end of the third cylindrical band are located along the same cylindrical layer.

14. The catheter of claim 12 , wherein the any one or all of the first cylindrical band, the second cylindrical band, and the third cylindrical band are formed from a hypotube.

15. A treatment catheter comprising:

an axially extending elongate member;

a plurality of cylindrical conductive bands mounted to the elongate member and longitudinally spaced apart from each other; and

a plurality of wires electrically connecting a voltage source to the plurality of cylindrical conductive bands,

wherein the number of cylindrical conductive bands of the plurality of cylindrical conductive bands is n,

wherein the plurality of cylindrical conductive bands are spaced relative to one another to define at least one spark gap, wherein a number of spark gaps of the treatment catheter is n−1, and

wherein the plurality of cylindrical conductive bands are configured such that one or more voltage pulse applied to the plurality of wires causes current to flow across the at least one spark gap and generate at least one shock wave in the liquid.

16. The treatment catheter of claim 15 , wherein n is an integer selected from 2, 4, 5, 7, 8, 10, 12, 16, and 20.

17. A treatment catheter comprising:

an axially extending elongate member;

a balloon;

a fluid lumen for introducing fluid to the balloon from a fluid source; and

an electrode pair comprising a first electrode and a second electrode and configured to generate a shock wave that propagates through the fluid and impinges on a calcified lesion,

wherein the first electrode is longitudinally spaced from the second electrode such that spacing between the first electrode and the second electrode forms a spark gap between the first electrode and the second electrode,

wherein the first electrode and the second electrode are circumferentially disposed around the axially extending elongate member,

wherein the treatment catheter is configured to facilitate navigation of the treatment catheter within tortuous vascular pathways, and

wherein the first electrode and the second electrode are configured such that a voltage pulse applied across the first electrode and the second electrode causes current to flow across the spark gap between the first electrode and the second electrode and generate a shock wave.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 4, 2024
From: NGUYEN, HOA D.; ADAMS, JOHN M.
To: SHOCKWAVE MEDICAL, INC.
Reel/Frame 068486/0668 →
Continuity (5)
Division 17725435 · Apr 20, 2022
Division 16691449 · Nov 21, 2019
Division 15346132 · Nov 8, 2016
Provisional Application 62257141 · Nov 18, 2015
Related Publication 20240341787A1 · Oct 17, 2024
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