Catheter system with multiple energy sources

Patent metadata

Field	Value
Publication number	US-2025072967-A1
Application number	US-202418817910-A
Country	US
Kind code	A1
Filing date	Aug 28, 2024
Priority date	Aug 29, 2023
Publication date	Mar 6, 2025
Grant date	—

Abstract

A catheter system for treating stenosis in a body lumen includes a first energy source, a second energy source, and a catheter. The catheter includes an elongate member that is navigable through the body lumen, a first acoustic energy emitter connected to the first energy source and configured to emit acoustic energy when energy is received from the first energy source, and a second acoustic energy emitter connected to the second energy source and configured to emit acoustic energy when energy is received from the second energy source.

First claim

1 . A catheter for treating stenosis in a body lumen, the catheter comprising:
an elongate member; an enclosure sealed to a distal region of the elongate member and fillable with a fluid; a forward-firing acoustic energy emitter located on the elongate member at least partially outside of the enclosure on a distal side of the enclosure; and a radially-firing acoustic energy emitter located on the elongate member at least partially inside of the enclosure.

2 . The catheter of claim 1 , wherein the forward-firing acoustic energy emitter is optically connected to a light energy source, the light energy source comprises a laser, and the forward-firing emitter comprises a distal end of an optical fiber.

3 . The catheter of claim 2 , wherein the light energy source emits infrared light.

4 . The catheter of claim 1 , wherein the radially-firing acoustic energy emitter is electrically connected to a voltage pulse generator and comprises an electrode pair.

5 . The catheter of claim 4 , wherein a first electrode of the electrode pair comprises a conductive surface of a band and a second electrode of the electrode pair comprises a conductive portion of an elongate conductive member.

6 . The catheter of claim 1 , wherein the forward-firing acoustic energy emitter is electrically connected to a voltage pulse generator and comprises an electrode pair.

7 . The catheter of claim 1 , wherein the radially-firing acoustic energy emitter is optically connected to a light energy source that emits an infrared laser light.

8 . The catheter of claim 1 , comprising a first radially-firing acoustic energy emitter and a second radially-firing acoustic energy emitter.

9 . The catheter of claim 8 , wherein the first radially-firing acoustic energy emitter is electrically connected to a voltage pulse generator and the second radially-firing acoustic energy emitter is optically connected to a light energy source.

10 . The catheter of claim 1 , wherein the forward firing acoustic energy emitter and the radially firing acoustic energy emitter are connected to different types of energy sources.

11 . The catheter of claim 1 , wherein the forward firing acoustic energy emitter and the radially firing acoustic energy emitter are connected to a single energy source.

12 . The catheter of claim 11 , wherein the forward firing acoustic energy emitter and the radially firing acoustic energy emitter are electrically connected in series.

13 . The catheter of claim 11 , wherein the forward firing acoustic energy emitter and the radially firing acoustic energy emitter are connected to separate channels of a high-voltage generator.

14 . A catheter for treating stenosis in a body lumen, the catheter comprising:
an elongate member; an enclosure sealed to a distal region of the elongate member; a longitudinally movable member mounted at least partially around the elongate member and located inside of the enclosure; a forward-firing acoustic energy emitter located on the elongate member at least partially outside of the enclosure on a distal end of the enclosure; and a radially-firing acoustic energy emitter located on the longitudinally movable member at least partially inside of the enclosure.

15 . The catheter of claim 14 , wherein the forward-firing acoustic energy emitter comprises a distal end of an optical fiber that extends from a laser source.

16 . The catheter of claim 14 , wherein the radially-firing acoustic energy emitter comprises a distal end of an optical fiber that extends from a laser source.

17 . The catheter of claim 16 , wherein the laser source generates a laser having a wavelength suitable for treating calcified lesions.

18 . The catheter of claim 16 , wherein the laser source generates a laser having a wavelength suitable for treating tissue softer than calcium.

19 . The catheter of claim 14 , wherein the enclosure has a working length of at least 30 mm.

20 . A method of treating a lesion in a vessel, the method comprising:
advancing a catheter into the vessel until a distal end of the catheter is positioned proximate the lesion; delivering energy to a distal acoustic energy emitter of the catheter; advancing the catheter such that an enclosed radially-firing acoustic energy emitter of the catheter is adjacent the lesion; delivering energy to the enclosed radially-firing acoustic energy emitter to generate acoustic energy to further treat the lesion; and generating one or more pressure waves from the enclosed radially-firing acoustic energy emitter.

21 . The method of claim 20 , wherein the enclosed radially-firing acoustic energy emitter comprises one of an electrode pair and a distal end of an optical fiber.

22 . The method of claim 20 , further comprising:
before the step of delivering energy to the enclosed radially-firing acoustic energy emitter, inflating the enclosure of the catheter; after the step of delivering energy to the enclosed radially-firing acoustic energy emitter, moving the radially-firing emitter in a longitudinal direction of the catheter; repeating the step of generating one or more pressure waves from the enclosed radially-firing acoustic energy emitter.

23 . The method of claim 20 , further comprising the step of tuning acoustic energy properties of the enclosed radially-firing acoustic energy emitter.

24 . A catheter system for treating stenosis in a body lumen, the catheter system comprising:
a first energy source; a second energy source; and a catheter comprising:
an elongate member configured to be navigated through the body lumen;
a first acoustic energy emitter connected to the first energy source and configured to emit acoustic energy when energy is received from the first energy source; and
a second acoustic energy emitter connected to the second energy source and configured to emit acoustic energy when energy is received from the second energy source.

25 . The catheter system of claim 24 , wherein the catheter further comprises an enclosure and the first acoustic energy emitter and the second acoustic energy emitter are enclosed in the enclosure.

26 . The catheter system of claim 24 , wherein the first energy source is a voltage pulse generator and the second energy source is a laser light source.

27 . The catheter system of claim 24 , wherein the first energy source is a first voltage pulse generator and the second energy source is a second voltage pulse generator configured to generate voltage pulses having different electrical properties than voltage pulses generated by the first voltage pulse generator.

28 . The catheter system of claim 24 , wherein the first acoustic energy emitter and the second energy emitter are both unenclosed.

29 . The catheter system of claim 24 , wherein the first energy source is a first laser light source and the second energy source is a second laser light source that generates light having different light energy properties than the light generated by the first laser light source.

30 . The catheter system of claim 24 , further comprising a third energy source, wherein the catheter includes a third acoustic energy emitter connected to the third energy source.

Assignees

• Shockwave Medical Inc

Inventors

• Hasenberg Thomas Charles
• Peng Steven Yihlih
• Stephens Patrick

Classifications

• A61B18/24

  with a catheter (A61B18/26, A61B18/28 take precedence) · CPC title

• A61B2017/22062

  to be filled with liquid · CPC title

• A61B2018/266

  the conversion of laser energy into mechanical shockwaves taking place in a part of the probe · CPC title

• A61B17/2202

  the ultrasound transducer being inside patient's body at the distal end of the catheter · CPC title

• A61B2017/22025

  applying a shock wave (A61B2017/22091 takes precedence) · CPC title