Spring electrode shock waveguide

Abstract

This invention relates to the field of shock waveguide technology and discloses a spring electrode shock waveguide, comprising a slender carrier and a balloon. The space formed between the balloon and the carrier is an annular channel for fluid to enter and achieve inflation. First, the electrode in the guide tube is designed as a spring-type spiral structure and wound around the surface of the carrier, which can provide good electrical contact and make the electrode have excellent ductility, solving the problem of large stress on the electrode during the deformation of the balloon under fluid compression. Through the design of a first support mechanism and a second support mechanism, the first support mechanism is connected between two adjacent outer walls of the electrode, providing axial support force for the electrode, and the second support mechanism is connected between the inner wall of the balloon and the outer wall of the electrode, providing radial support force for the electrode. This reduces the pressure on the electrode when the internal pressure of the balloon increases and the balloon expands, further solving the stress problem of the electrode during the deformation of the balloon.

Description

Technical Field

[0001] This invention relates to the field of shock wave duct technology, specifically to a spring electrode shock wave duct. Background Technology

[0002] Shockwave catheters, especially intravascular shockwave balloon catheters, are an innovative treatment technology primarily used to treat calcified vascular lesions. Intravascular shockwave lithotripsy originates from the lithotripsy principle used in the treatment of urinary system stones, and has been innovatively developed by combining it with balloon angioplasty technology. This technology uses acoustic pressure waves to selectively target calcified sites (calcified lesions in the intima and media). Without damaging the integrity of the vascular intima, the balloon catheter can effectively loosen or rupture calcified lesions, restoring vascular elasticity (compliance) and providing a more ideal lumen for subsequent treatments (such as drug-eluting balloons or stent implantation).

[0003] A search revealed that patent application number CN202210955952.3 discloses an intravascular imaging shockwave balloon catheter and medical device. The balloon catheter includes: an outer tube; a balloon located at the distal end of the outer tube and communicating with it; an inner tube inserted into the cavity formed by the outer tube and the balloon, with the distal end of the inner tube protruding from the distal end of the balloon; an imaging probe located in the inner tube, specifically in the portion of the inner tube protruding from the balloon, which acquires imaging signals; a spring tube located in the inner tube, with its distal end connected to the imaging probe and its proximal end connected to a drive structure for driving the movement of the imaging probe; and an electrode located on the outer surface of the inner tube and inside the balloon, connected to a high-voltage pulse output module. When the balloon is filled with conductive liquid, the electrode, under the action of the high-voltage pulse, breaks down the nearby conductive liquid, generating a mechanical shockwave within the balloon. Therefore, both intravascular imaging of diseased blood vessels and shockwave therapy can be performed. This significantly simplifies the shockwave therapy procedure and reduces surgical harm to the patient.

[0004] While the current distribution structure of electrodes on the balloon in shock waveguides can provide conductivity, the electrical contact effect is poor, and the electrodes do not have good ductility. During the deformation of the balloon under the influence of fluid impact, the electrodes will be subjected to significant stress. Therefore, we need to propose a spring electrode shock waveguide. Summary of the Invention

[0005] The purpose of this invention is to provide a spring-electrode shockwave duct. Firstly, the electrode within the duct is designed as a spring-like helical structure, wound around the surface of a carrier. This provides excellent electrical contact and gives the electrode outstanding ductility, solving the problem of significant stress on the electrode during the deformation of the balloon under fluid compression. Through the design of a first support mechanism and a second support mechanism, the first support mechanism is connected between two adjacent outer rings of the electrode, providing axial support force. The second support mechanism is connected between the inner wall of the balloon and the outer wall of the electrode, providing radial support force. This reduces the pressure on the electrode when the internal pressure of the balloon increases and the balloon expands, further solving the stress problem of the electrode during balloon deformation, thus addressing the issues raised in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a spring electrode shock waveguide, comprising a slender carrier and a balloon sealed to the outer wall of the carrier. The space formed between the balloon and the carrier is an annular channel for fluid to enter and achieve inflation. An electrode with a spring-type spiral structure wound around the outer wall of the carrier is disposed inside the annular channel. A second support mechanism for providing axial support force to the electrode is also installed on the outer wall of the carrier and connected between two adjacent turns of the electrode. A first support mechanism for providing radial support force to the electrode is connected between the inner wall of the balloon and the outer wall of the electrode.

[0007] Preferably, the balloon includes a main deformable portion located in the middle and buffer portions connected to both ends of the main deformable portion, with a first connecting portion and a second connecting portion respectively connected to one end of each of the two buffer portions.

[0008] Preferably, the main deformation part is cylindrical, the buffer part is frustum-shaped, the first connecting part and the second connecting part are also cylindrical, and the inner diameter of the first connecting part is larger than the inner diameter of the second connecting part.

[0009] Preferably, it also includes a high-voltage pulse source, and a counter electrode is provided inside the annular channel. The electrode and the counter electrode are connected to the high-voltage pulse source through a connector.

[0010] Preferably, the electrode is connected to the positive terminal of the high-voltage pulse source, and the counter electrode is connected to the negative terminal of the high-voltage pulse source.

[0011] Preferably, the first support mechanism includes a first mounting plate installed on the inner wall of the balloon and a second mounting plate installed on the outer wall of the electrode, with a first spring connecting the first mounting plate and the second mounting plate.

[0012] Preferably, a first rotating seat is mounted on the first mounting plate, and an X-shaped first support frame is connected to the first rotating seat; a second rotating seat is mounted on the second mounting plate, and an X-shaped second support frame is connected to the second rotating seat.

[0013] Preferably, a pivot is connected between the bottom of the first support frame and the top of the second support frame.

[0014] Preferably, the second support mechanism includes a fixing block that is inclinedly mounted on the carrier, and mounting seats are installed on the outer walls of two adjacent rings of the electrodes. A second spring connects the fixing block and the mounting seats.

[0015] Preferably, the electrode includes an insulating wire, an electrode wire is disposed inside the insulating wire, and an opening is formed on the outer sheath of the insulating wire.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. The present invention first designs the electrode in the catheter as a spring-type spiral structure and wraps it around the surface of the carrier, which can provide good electrical contact and make the electrode have excellent ductility, thus solving the problem of large stress on the electrode during the deformation of the balloon by fluid compression.

[0018] 2. The present invention, through the design of a first support mechanism and a second support mechanism, provides axial support force to the electrode by connecting the two adjacent outer walls of the electrode and the second support mechanism by connecting the inner wall of the balloon and the outer wall of the electrode. This provides radial support force to the electrode, thereby reducing the pressure on the electrode when the pressure inside the balloon increases and the balloon expands, and further solving the stress problem of the electrode during the deformation process of the balloon. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0021] Figure 3 This is a cross-sectional view of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the first support mechanism of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the second support mechanism of the present invention;

[0024] Figure 6 For the present invention Figure 3 Enlarged view of part A in the middle.

[0025] In the figure: 1. Balloon; 11. Main deformation part; 12. Buffer part; 13. First connecting part; 14. Second connecting part; 2. Carrier; 3. High voltage pulse source; 4. Connector; 5. Electrode; 51. Insulating wire; 52. Opening; 53. Electrode wire; 6. Counter electrode; 7. First support mechanism; 71. First mounting plate; 72. Second mounting plate; 73. First rotating seat; 74. Second rotating seat; 75. First support frame; 76. Second support frame; 77. Rotating shaft; 78. First spring; 8. Second support mechanism; 81. Fixing block; 82. Second spring; 83. Mounting seat. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figure 1-6 The present invention provides a technical solution: a spring electrode shock waveguide, comprising a slender carrier 2 and a balloon 1 sealed and fitted onto the outer wall of the carrier 2. The space formed between the balloon 1 and the carrier 2 is an annular channel for fluid to enter and achieve inflation. The interior of the annular channel can be filled with water or saline. An electrode 5 with a spring-type spiral structure wound around the outer wall of the carrier 2 is disposed inside the annular channel. The spring-type spiral structure electrode 5 can provide good electrical contact and has excellent ductility, thus solving the stress problem of the electrode 5 during the deformation process of the balloon 1.

[0028] A second support mechanism 8, providing axial support force to the electrode 5, is also installed on the outer wall of the carrier 2, connecting the two adjacent rings of electrodes 5. A first support mechanism 7, providing radial support force to the electrode 5, is connected between the inner wall of the balloon 1 and the outer wall of the electrode 5. Through the combined use of the first support mechanism 7 and the second support mechanism 8, the stress problem of the electrode 5 during the deformation process of the balloon 1 is further solved.

[0029] The balloon 1 includes a main deformable part 11 located in the middle and buffer parts 12 connected to both ends of the main deformable part 11. One end of each buffer part 12 is connected to a first connecting part 13 and a second connecting part 14.

[0030] After the balloon 1 is injected with fluid and deforms, the main deformable part 11 expands to the maximum extent and adheres to the blood vessel wall. The main deformable part 11 is equipped with a lithotripter, and the first connecting part 13 and the buffer part 12 between the main deformable part 11 and the first connecting part 13 are both equipped with low-profile emitters to adapt to narrow and difficult-to-cross calcified lesions.

[0031] The main deformation part 11 is cylindrical, the buffer part 12 is frustum-shaped, the first connecting part 13 and the second connecting part 14 are also cylindrical, and the inner diameter of the first connecting part 13 is larger than the inner diameter of the second connecting part 14.

[0032] It also includes a high-voltage pulse source 3, and a counter electrode 6 is provided inside the annular channel. Electrode 5 and counter electrode 6 are connected to the high-voltage pulse source 3 through connector 4.

[0033] Electrode 5 is connected to the positive terminal of high voltage pulse source 3, and counter electrode 6 is connected to the negative terminal of high voltage pulse source 3.

[0034] The first support mechanism 7 includes a first mounting plate 71 mounted on the inner wall of the balloon 1 and a second mounting plate 72 mounted on the outer wall of the electrode 5. A first spring 78 is connected between the first mounting plate 71 and the second mounting plate 72. When fluid is injected into the annular channel, the balloon 1 expands, the distance between the first mounting plate 71 and the second mounting plate 72 increases, the first spring 78 is stretched, and at the same time, the first support frame 75 and the second support frame 76 rotate to adapt to the change in the distance between the first mounting plate 71 and the second mounting plate 72. The tension of the first spring 78 on the electrode 5 is offset by the pressure of the injected fluid on the electrode 5, reducing the radial pressure on the electrode 5.

[0035] A first rotating seat 73 is mounted on the first mounting plate 71, and an X-shaped first support frame 75 is connected to the first rotating seat 73. A second rotating seat 74 is mounted on the second mounting plate 72, and an X-shaped second support frame 76 is connected to the second rotating seat 74.

[0036] The two support rods in the first support frame 75 and the second support frame 76 of the X-type are rotatably connected by damping bearings, which can convert part of the pressure into damping force.

[0037] A pivot 77 is connected between the bottom of the first support frame 75 and the top of the second support frame 76 to ensure the stability of the first support frame 75 and the second support frame 76 under tensile or compressive deformation.

[0038] The second support mechanism 8 includes a fixing block 81 that is inclinedly mounted on the carrier 2, and mounting seats 83 that are installed on the outer walls of two adjacent rings of electrodes 5. A second spring 82 connects the fixing block 81 and the mounting seats 83. The fluid that is filled in will also exert axial pressure on the electrodes 5. The second spring 82 can convert the pressure into elastic force to reduce the stress on the electrodes 5.

[0039] Electrode 5 includes an insulating wire 51, an electrode wire 53 is disposed inside the insulating wire 51, and an opening 52 is provided on the outer sheath of the insulating wire 51.

[0040] The exposed electrode wire 53 is separated from the saline solution inside the balloon, and each opening 52 forms a shock wave source.

[0041] In use, fluid is introduced into the annular channel to inflate the balloon 1. The internal pressure of the annular channel increases, the balloon 1 expands / inflates, and the fluid introduced puts pressure on the electrode 5, causing stress on the electrode 5. The first support mechanism 7 and the second support mechanism 8 can alleviate the stress problem of the electrode 5.

[0042] As the balloon 1 expands, the distance between the first mounting plate 71 and the second mounting plate 72 increases, the first spring 78 is stretched, and at the same time, the first support frame 75 and the second support frame 76 rotate to adapt to the change in the distance between the first mounting plate 71 and the second mounting plate 72. The tension of the first spring 78 on the electrode 5 is offset by the pressure of the filled fluid on the electrode 5, reducing the radial pressure on the electrode 5.

[0043] At the same time, the fluid filling the electrode will also exert axial pressure on the electrode 5. The second spring 82 can convert the pressure into elastic force to reduce the stress on the electrode 5.

[0044] Furthermore, an electric arc is generated when high voltage is applied between electrode 5 and counter electrode 6. Electrode 5 and counter electrode 6 are connected to high-voltage pulse source 3 via connector 4. The source 3 is made of metal and has a set spacing to generate a repeatable electric arc. The electric arc generates a shock wave in the fluid, which is transmitted by the high-voltage pulse source 3, creating a controllable shock wave flow within the longitudinal length of balloon 1 and within the treated artery. Water or saline solution can be injected into balloon 1 to fix it to the arterial wall, and it can also contain X-ray contrast agent for fluoroscopic observation. The physician can adjust the shock wave energy as needed to break up calcified plaques. The energy is conducted to the lesion site to break up hardened plaques without applying excessive pressure to the arterial wall. The voltage that generates the electric arc depends on the electrode gap, typically ranging from 100 to 3000 volts. The pulse duration depends on the electrode surface area, requiring sufficient energy to generate bubbles that cause the current plasma arc to jump, producing rapidly expanding and collapsing bubbles to form a shock wave. The pulse duration is adjustable, and the shock wave can be as short as a few microseconds.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A spring electrode shock waveguide characterized by: The device includes a slender carrier (2) and a balloon (1) sealed on the outer wall of the carrier (2). The space formed between the balloon (1) and the carrier (2) is an annular channel for fluid to enter and achieve inflation. An electrode (5) with a spring-type spiral structure wound on the outer wall of the carrier (2) is provided inside the annular channel. A second support mechanism (8) is also installed on the outer wall of the carrier (2) to provide axial support force for the electrode (5) between two adjacent turns of the electrode (5). A first support mechanism (7) to provide radial support force for the electrode (5) is connected between the inner wall of the balloon (1) and the outer wall of the electrode (5). The balloon (1) includes a main deformable part (11) located in the middle and buffer parts (12) connected to both ends of the main deformable part (11). One end of each of the two buffer parts (12) is connected to a first connecting part (13) and a second connecting part (14). The main deformable part (11) is cylindrical, the buffer parts (12) are frustoconical, and the first connecting part (13) and the second connecting part (14) are also cylindrical. The inner diameter of the first connecting part (13) is larger than the inner diameter of the second connecting part (14). The first support mechanism (7) It includes a first mounting plate (71) installed on the inner wall of the balloon (1) and a second mounting plate (72) installed on the outer wall of the electrode (5). A first spring (78) is connected between the first mounting plate (71) and the second mounting plate (72). A first rotating seat (73) is installed on the first mounting plate (71), and an X-shaped first support frame (75) is connected to the first rotating seat (73). A second rotating seat (74) is installed on the second mounting plate (72), and an X-shaped second support frame (76) is connected to the second rotating seat (74).

2. The spring electrode shock waveguide of claim 1, wherein: It also includes a high-voltage pulse source (3), and a counter electrode (6) is provided inside the annular channel. The electrode (5) and the counter electrode (6) are connected to the high-voltage pulse source (3) through a connector (4).

3. The spring electrode shock waveguide of claim 2, wherein: The electrode (5) is connected to the positive terminal of the high voltage pulse source (3), and the counter electrode (6) is connected to the negative terminal of the high voltage pulse source (3).

4. The spring electrode shock waveguide of claim 1, wherein: A pivot (77) is connected between the bottom of the first support frame (75) and the top of the second support frame (76).

5. The spring electrode shock waveguide of claim 1, wherein: The second support mechanism (8) includes a fixing block (81) that is inclinedly installed on the carrier (2), and mounting seats (83) are installed on the outer walls of the two adjacent circles of the electrodes (5). A second spring (82) is connected between the fixing block (81) and the mounting seat (83).

6. The spring electrode shock waveguide of claim 1, wherein: The electrode (5) includes an insulating wire (51), an electrode wire (53) is disposed inside the insulating wire (51), and an opening (52) is provided on the outer sheath of the insulating wire (51).

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