IP Library › Granted Patent US 12,274,485
Granted Patent B2
US 12,274,485 · App. 18/142,277 · Granted Apr 15, 2025

Balloon assembly for valvuloplasty catheter system

Inventor: Eric Schultheis (San Clemente, CA)
Assignee: BOLT MEDICAL, INC.
A61B18/042A61B18/1492A61B18/26A61B2018/00255A61B2018/00369A61B2018/1467A61B2018/263
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Quick Facts
Patent No.
US 12,274,485
App. No.
18/142,277
Granted
Apr 15, 2025
Kind
B2
Abstract

A method for treating a treatment site ( 106 ) within or adjacent to a heart valve ( 108 ) within a body of a patient includes the steps of generating energy with an energy source ( 124 ); receiving energy from the energy source ( 124 ) with an energy guide ( 122 A); positioning a balloon assembly ( 104 ) adjacent to the treatment site ( 106 ), the balloon assembly ( 104 ) including an outer balloon ( 104 B) and an inner balloon ( 104 A) that is positioned within and at least partially spaced-apart from the outer balloon ( 104 B) to define an interstitial space ( 146 A) therebetween that is configured to retain a balloon fluid ( 132 ); and positioning a portion of the energy guide ( 122 A) that receives the energy from the energy source ( 124 ) within the interstitial space ( 146 A) between the balloons ( 104 A, 104 B) so that a plasma-induced bubble ( 134 ) is formed in the balloon fluid ( 132 ) within the interstitial space ( 146 A).

Claims (24)

1. A method for treating a treatment site within or adjacent to a heart valve within a body of a patient, the method comprising the steps of:

generating energy with an energy source;

receiving energy from the energy source with an energy guide;

positioning a balloon assembly adjacent to the treatment site, the balloon assembly including an outer balloon and an inner balloon that is positioned within and at least partially spaced-apart from the outer balloon to define an interstitial space therebetween that is configured to retain a balloon fluid; and

positioning a portion of the energy guide that receives the energy from the energy source within the interstitial space between the balloons so that a plasma-induced bubble is formed in the balloon fluid within the interstitial space.

2. The method of claim 1 further comprising the step of selectively inflating each of the balloons with the balloon fluid to expand to an inflated state so that the inner balloon is spaced apart from the outer balloon to define the interstitial space therebetween.

3. The method of claim 2 wherein the step of positioning the balloon assembly includes positioning the outer balloon substantially adjacent to the treatment site when the balloons are in the inflated state.

4. The method of claim 2 wherein the step of selectively inflating includes the inner balloon having an inner balloon diameter, and the outer balloon having an outer balloon diameter that is greater than the inner balloon diameter of the inner balloon when the balloons are in the inflated state.

5. The method of claim 4 wherein the step of selectively inflating includes the outer balloon diameter of the outer balloon being at least approximately 5% greater than the inner balloon diameter of the inner balloon when the balloons are in the inflated state.

6. The method of claim 4 wherein the step of selectively inflating includes the outer balloon diameter of the outer balloon being at least approximately 20% greater than the inner balloon diameter of the inner balloon when the balloons are in the inflated state.

7. The method of claim 2 wherein the step of selectively inflating includes the inner balloon being inflated to a greater inflation pressure than the outer balloon when the balloons are in the inflated state.

8. The method of claim 2 wherein the step of selectively inflating includes the inner balloon having a first balloon shape and the outer balloon having a second balloon shape that is different from the first balloon shape when the balloons are in the inflated state.

9. The method of claim 1 wherein the step of positioning the balloon assembly includes the inner balloon being made from a first material, and the outer balloon being made from a second material that is different from the first material; and wherein the step of selectively inflating includes the first material having a first compliance, and the second material having a second compliance that is greater than the first compliance so that the outer balloon expands at a faster rate than the inner balloon when the balloons are expanded to an inflated state.

10. The method of claim 1 wherein the step of positioning a portion of the energy guide includes positioning the portion of the energy guide substantially directly adjacent to an outer surface of the inner balloon.

11. The method of claim 10 wherein the step of positioning the portion of the energy guide includes adhering the energy guide to the outer surface of the inner balloon.

12. The method of claim 1 wherein the step of positioning a portion of the energy guide includes positioning the portion of the energy guide spaced apart from the outer surface of the inner balloon.

13. The method of claim 12 the step of positioning the portion of the energy guide includes mounting a guide support structure on the outer surface of the inner balloon, and positioning the energy guide on the guide support structure so that the energy guide is positioned spaced apart from the outer surface of the inner balloon.

14. The method of claim 1 wherein the heart valve includes a valve wall; and wherein the step of positioning the balloon assembly includes positioning the balloon assembly adjacent to the valve wall.

15. The method of claim 1 wherein the heart valve includes a plurality of leaflets; and wherein the step of positioning the balloon assembly includes positioning the balloon assembly adjacent to at least one of the plurality of leaflets.

16. The method of claim 1 wherein the step of positioning a portion of the energy guide includes positioning a guide distal end of the energy guide within the interstitial space between the balloons approximately at a midpoint of the heart valve.

17. The method of claim 1 wherein the formation of the plasma-induced bubble imparts pressure waves upon the outer balloon adjacent to the treatment site.

18. The method of claim 1 wherein the step of generating energy includes generating pulses of energy with the energy source that are guided along the energy guide into the interstitial space between the balloons to induce the plasma-induced bubble formation in the balloon fluid within the interstitial space between the balloons.

19. The method of claim 1 wherein the step of generating energy includes the energy source being a laser source that provides pulses of laser energy; and wherein the step of receiving energy includes the energy guide including an optical fiber.

20. The method of claim 1 wherein the step of generating energy includes the energy source being a high voltage energy source that provides pulses of high voltage; wherein the step of receiving energy includes the energy guide including an electrode pair including spaced apart electrodes that extend into the interstitial space between the balloons; and wherein pulses of high voltage from the energy source are applied to the electrodes and form an electrical arc across the electrodes.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 27, 2025
From: BOLT MEDICAL, INC.
To: BOSTON SCIENTIFIC SCIMED, INC.
Reel/Frame 073266/0518 →
Continuity (3)
Continuation 17553156 · Dec 16, 2021
Provisional Application 63136474 · Jan 12, 2021
Related Publication 20230310054A1 · Oct 5, 2023
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