IP Library › Granted Patent US 12,471,939
Granted Patent B2
US 12,471,939 · App. 18/596,388 · Granted Nov 18, 2025

Shock wave catheter with retractable enclosure

Inventors: Rainier Betelia (San Jose, CA); Todd Weston Jenkins (San Jose, CA); Danielle Sheree Rond (Santa Clara, CA)
Assignee: SHOCKWAVE MEDICAL, INC.
A61B17/22022A61B2017/00336A61B2017/22008A61B2017/22025A61B2017/22061A61M25/104
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Quick Facts
Patent No.
US 12,471,939
App. No.
18/596,388
Granted
Nov 18, 2025
Kind
B2
Abstract

A shock wave catheter for treating a lesion in a body lumen includes a shock wave emitter assembly and a retractable enclosure. In a first configuration of the catheter, the retractable enclosure is sealed to a distal member of the catheter and the lesion is treated by shock waves propagating through the enclosure wall. In a second configuration of the catheter, the retractable enclosure is retracted from the distal member of the catheter and the lesion is treated directly by shock waves emitted from the shock wave emitter assembly.

Claims (52)

1 . A catheter for emitting shock waves in a body lumen, the catheter comprising:

a distal member;

a slidable elongate member having a proximal end and a distal end;

an inner elongate member located at least partially inside of the slidable elongate member and extending to the distal member;

a shock wave emitter assembly located on the inner elongate member and in a more distal location than the distal end of the slidable elongate member; and

a retractable enclosure having a distal end,

where:

in a closed configuration, the distal end of the retractable enclosure extends to the distal member of the catheter to form a seal, and

in an open configuration, the distal end of the retractable enclosure is retracted from the distal member of the catheter.

2 . The catheter of claim 1 , further comprising a proximal handle having a switch that is operably coupled with the retractable enclosure to move the retractable enclosure between the closed configuration and the open configuration.

3 . The catheter of claim 2 , wherein the slidable elongate member comprises a first lumen and the proximal handle comprises a first port in fluid communication with the first lumen.

4 . The catheter of claim 3 , wherein the slidable elongate member further comprises a second lumen and the proximal handle further comprises a second port in fluid communication with the second lumen.

5 . The catheter of claim 3 , wherein the proximal handle further comprises a second port in fluid communication with the first lumen.

6 . The catheter of claim 1 , wherein the distal member comprises an expandable member, the distal end of the retractable enclosure comprises a polymeric liner, and, in the closed configuration, the seal is formed between the expandable member and the polymeric liner.

7 . The catheter of claim 6 , wherein the polymeric liner comprises a polytetrafluoroethylene.

8 . The catheter of claim 1 , wherein, in the closed configuration, the catheter further comprises a chamber surrounding the shock wave emitter assembly and having an internal pressure no less than 1 atm.

9 . The catheter of claim 1 , wherein the distal member comprises an expandable member located distally of the retractable enclosure.

10 . The catheter of claim 1 , wherein the retractable enclosure comprises polyether block amide, nylon, thermoplastic polyurethane, fluorinated ethylene propylene, polytetrafluoroethylene, or a combination thereof.

11 . The catheter of claim 1 , wherein the distal member comprises an elastic tip.

12 . The catheter of claim 1 , further comprising at least one fluid lumen having a distal opening adjacent the shock wave emitter assembly.

13 . The catheter of claim 1 , wherein, in the open configuration, the distal end of the retractable enclosure is spaced apart from the distal member of the catheter by a distance greater than or equal to 5 mm.

14 . The catheter of claim 1 , wherein, in the open configuration, the distal end of the retractable enclosure is at least partially located proximally of the shock wave emitter assembly.

15 . The catheter of claim 1 , wherein the retractable enclosure comprises an angioplasty balloon.

16 . The catheter of claim 15 , wherein the retractable enclosure includes a distal end opening with an inner diameter no less than a maximum outer diameter of the shock wave emitter assembly.

17 . The catheter of claim 16 , wherein the inner diameter of the distal end opening of the retractable enclosure is no less than 5 mm.

18 . The catheter of claim 15 , wherein, in the closed configuration, the retractable enclosure forms a chamber surrounding the shock wave emitter assembly, the chamber having an internal pressure no less than 1 atm and no more than 4 atm.

19 . The catheter of claim 15 , wherein the retractable enclosure comprises polyether block amide, polytetrafluoroethylene, or a combination thereof.

20 . The catheter of claim 15 , further comprising at least one fluid lumen having a distal opening adjacent the shock wave emitter assembly.

21 . The catheter of claim 15 , wherein, in the open configuration, a distal end opening of the retractable enclosure is spaced apart from the distal member of the catheter by a distance greater than or equal to 5 mm.

22 . A catheter system for generating shock waves, the catheter system comprising:

a power source configured to generate a plurality of energy pulses, each energy pulse having a predetermined power; and

a catheter comprising a shock wave emitter assembly and an elongate energy guide extending from the power source to the shock wave emitter assembly,

where, in a first setting of the catheter system, the shock wave emitter assembly generates a first shock wave having a first sonic output when a first energy pulse of the plurality of energy pulses is applied to the shock wave emitter assembly, and, in a second setting of the catheter system, the shock wave emitter assembly generates a second shock wave having a second sonic output greater than the first sonic output when a second energy pulse of the plurality of energy pulses is applied to the shock wave emitter assembly, and

wherein the catheter further comprises a distal member and a retractable enclosure that, in the first setting, is sealed to the distal member so as to define a chamber and, in the second setting, is spaced from the distal member.

23 . The system of claim 22 , wherein the catheter comprises:

a slidable elongate member; and

an inner elongate member located at least partially inside of the slidable elongate member and extending to the distal member,

wherein the shock wave emitter assembly is located on the inner elongate member and in a more distal location than a distal end of the slidable elongate member.

24 . The system of claim 23 , wherein the catheter further comprises a proximal handle having a first port, and the slidable elongate member comprises a first lumen in fluid communication with the first lumen.

25 . The system of claim 24 , wherein the proximal handle further comprises a second port, and the slidable elongate member further comprises a second lumen in fluid communication with the second port.

26 . The system of claim 24 , wherein the proximal handle further comprises a second port in fluid communication with the first lumen of the slidable elongate member.

27 . The system of claim 22 , wherein the catheter further comprises a proximal handle having a switch that is operably coupled with the retractable enclosure to move the retractable enclosure between the first setting and the second setting.

28 . The system of claim 22 , wherein the distal member comprises an expandable member, the distal end of the retractable enclosure comprises a polymeric liner, and, in the first setting, the expandable member and the polymeric liner are sealed.

29 . The system of claim 22 , wherein the distal member comprises an expandable member located distally of the retractable enclosure.

30 . The system of claim 22 , wherein the distal member comprises an elastic tip.

31 . The system of claim 22 , wherein, in the first setting, the retractable enclosure forms a chamber surrounding the shock wave emitter assembly, the chamber having an internal pressure no less than 1 atm and no more than 4 atm.

32 . The system of claim 22 , wherein the catheter further comprises at least one fluid lumen having a distal opening adjacent the shock wave emitter assembly.

33 . The system of claim 22 , wherein, in the second setting, a distal end of the retractable enclosure is spaced apart from the distal member of the catheter by a distance of greater than or equal to 5 mm.

34 . The system of claim 22 , wherein, in the second setting, a distal end of the retractable enclosure is at least partially located proximally of the shock wave emitter assembly.

35 . The system of claim 22 , wherein the retractable enclosure comprises a distal end opening having an inner diameter no less than a maximum outer diameter of the shock wave emitter assembly.

36 . The system of claim 35 , wherein the inner diameter of the distal end opening of the retractable enclosure is no less than 5 mm.

37 . The system of claim 22 , wherein the power source is configured to adjust an amplitude, a pulse width, a frequency, a number of treatment cycles, a number of pulses generated by the shock wave emitter assembly, or a combination thereof between the first setting and the second setting.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 16, 2024
From: BETELIA, RAINIER; JENKINS, TODD WESTON; ROND, DANIELLE SHEREE
To: SHOCKWAVE MEDICAL, INC.
Reel/Frame 067128/0884 →
Continuity (1)
Related Publication 20250281191A1 · Sep 11, 2025
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