Ultrasonic ablation catheter with dual-transducer ablation structure

Abstract

The invention discloses an ultrasonic ablation catheter with a dual-transducer ablation structure. The ultrasonic ablation catheter comprises an inner tube, an outer tube, a first balloon, a second balloon, a first ultrasonic transducer and a second ultrasonic transducer, wherein the first ultrasonic transducer is mounted at the inner tube and surrounded by the first balloon, and the second ultrasonic transducer is mounted at the inner tube and surrounded by the second balloon. The ultrasonic ablation catheter is provided with the first balloon and the second balloon, and the sizes of the two balloons are different, so that proper balloons can be selected in blood vessels with different sizes, and more proper ablation is realized. After one balloon is selected for use, the volume of liquid in the balloon can be finely adjusted, so that the size of the balloon is finely adjusted, and a better ablation effect is achieved.

Description

Technical Field

[0001] This invention relates to the field of ablation catheter technology, and more specifically, to an ultrasonic ablation catheter with a dual-transducer ablation structure. Background Technology

[0002] Hypertension is a common disease that endangers human health. Overactivation of the renal sympathetic nervous system is one of the most important pathophysiological factors in hypertension. Renal denervation (RDN) is an innovative interventional therapy. This technique uses multiple energy modalities (including physical methods such as radiofrequency, ultrasound, and cryotherapy, or local injection of chemical agents) to precisely intervene in the adventitia of the blood vessels, thereby systematically reducing sympathetic nerve tone and achieving a sustained antihypertensive effect.

[0003] Based on their different mechanisms of action, renal artery radiofrequency ablation (RDN) mainly includes three categories: renal artery ultrasound ablation, and renal artery local chemical injection ablation. Ultrasound ablation requires an ultrasound transducer and the injection and retrieval of cooling fluid within a balloon to cool the vascular endothelium and prevent damage to areas that do not require ablation. However, due to individual differences and variations in the size of different renal arteries, different sized balloons are sometimes needed for ultrasound ablation. Existing ablation catheters often have fixed-size balloons. Repeatedly using a different size catheter for ablation is detrimental to the patient. Using a single catheter to ablate vessels of different sizes would greatly increase the convenience and reduce the difficulty of the procedure. Summary of the Invention

[0004] The present invention aims to overcome the shortcomings of the prior art and provide an ultrasonic ablation catheter with a dual transducer ablation structure.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an ultrasonic ablation catheter, comprising an inner tube, an outer tube, a first balloon, a second balloon, a first ultrasonic transducer installed in the inner tube and surrounded by the first balloon, and a second ultrasonic transducer installed in the inner tube and surrounded by the second balloon; the distal and proximal ends of the first balloon are connected to the inner tube, the distal end of the second balloon is connected to the inner tube, and the proximal end is connected to the distal end of the outer tube; the inner tube has a first fluid supply channel, a first recovery channel, and a second fluid supply channel in its sidewall, and the space between the inner tube and the outer tube forms the second recovery channel; the first fluid supply channel can supply fluid to the first balloon, the first recovery channel can recover fluid from the first balloon, the second fluid supply channel can supply fluid to the second balloon, and the second recovery channel can recover fluid from the second balloon.

[0006] Furthermore, the volume of the first balloon when inflated is smaller than the volume of the second balloon when inflated.

[0007] Furthermore, the first balloon is positioned closer to the distal end of the inner tube than the second balloon.

[0008] Furthermore, a pointed tube is fixed to the distal end of the inner tube.

[0009] This facilitates the insertion of the catheter.

[0010] Furthermore, the inner tube has a first partition fixedly connected to the inner wall of the inner tube, and a first pull-wire channel is formed between the first partition and the inner tube. The first liquid supply channel includes a first proximal channel, a first distal channel, and a connecting channel connecting the first proximal channel and the first distal channel. The inner tube has a side hole communicating with the space inside the second balloon and the connecting channel, and a first pull-wire through hole communicating with the first distal channel and the first pull-wire channel. A first sealing sleeve through which the first pull-wire passes is fixed in the first pull-wire through hole. The connecting channel includes a cylindrical part and a frustum-shaped part. A first sealing unit connected to the first pull-wire is installed in the connecting channel. The first sealing unit is connected to the proximal end of the connecting channel by a first spring. The first sealing unit includes a frustum-shaped block capable of sealing the frustum-shaped part, a movable column connected to the frustum-shaped block, and a movable sleeve connected to the movable column by multiple connecting rods. When there is no external force, the frustum-shaped block does not seal the connecting channel and the movable sleeve seals the side hole.

[0011] Furthermore, the first spring is a tension spring.

[0012] Thus, the first pull wire passes through the first sealing sleeve, the first pull wire can move relative to the first sealing sleeve, and the first pull wire and the first sealing sleeve are sealed to prevent leakage.

[0013] Furthermore, the frustum-shaped portion is closer to the distal end of the inner tube than the cylindrical portion.

[0014] Furthermore, the first pull line is connected to the frustum-shaped block.

[0015] Furthermore, by pulling the first pull line backward, the first sealing unit can block the connecting channel while the movable sleeve does not block the side hole.

[0016] Furthermore, the connection channel includes a frustum-shaped portion connected to the first distal channel and a cylindrical portion connected to the first proximal channel.

[0017] Furthermore, the outer diameter of the movable sleeve is equal to the diameter of the cylindrical portion of the connecting channel.

[0018] Furthermore, the connecting rods are multiple and divided into two rings, with the multiple connecting rods in each ring distributed at equal intervals in a ring; the frustum-shaped block is connected to the far end of the first pull wire.

[0019] This pulls the first wire, allowing the frustum-shaped block to abut against the frustum-shaped part of the connecting channel, thus blocking the connecting channel.

[0020] Furthermore, the inner tube has a second partition fixedly connected to the inner sidewall of the inner tube, forming a second pull-wire channel between the second partition and the inner tube; the second liquid supply channel includes a second proximal channel and a liquid outlet connecting the inner space of the second balloon and the second proximal channel; the inner tube has a second distal channel communicating with the second proximal channel and a U-shaped connecting channel connecting the second proximal channel and the second distal channel; a proximal annular protrusion is fixed in the second proximal channel, and a distal annular protrusion is fixed in the second distal channel; the proximal annular protrusion is connected to a cylindrical second sealing unit via a second spring; the second sealing unit is connected to a second pull wire; the inner tube has a second pull-wire through hole connecting the second proximal channel and the second pull-wire channel; a second sealing sleeve through which the second pull wire passes is fixed in the second pull-wire through hole; when there is no external force, the second sealing unit abuts against the distal annular protrusion, sealing the second distal channel and sealing the distal end of the U-shaped connecting channel.

[0021] Therefore, without external force, the liquid in the second proximal channel can only exit through the outlet hole and cannot enter the second distal channel.

[0022] Furthermore, the second spring is a compression spring.

[0023] Furthermore, by pulling the second pull line, the liquid outlet of the second sealing unit can be connected to the second proximal channel and the second distal channel via the U-shaped connecting channel.

[0024] Furthermore, by pulling the second cable backward, the second sealing unit can be made to abut against the proximal annular protrusion.

[0025] Furthermore, the proximal end of the ultrasonic ablation catheter is connected to a catheter seat, the catheter seat having a first supply tube communicating with a first supply channel, a first recovery tube communicating with a first recovery channel, a second supply tube communicating with a second supply channel, and a second recovery tube communicating with a second recovery channel.

[0026] This allows for the supply and recovery of liquid in the corresponding channels.

[0027] Furthermore, the catheter seat has a guidewire channel communicating with the space inside the inner tube.

[0028] This allows the guidewire to be inserted through the guidewire channel and the space inside the inner tube.

[0029] Furthermore, the conduit seat is also connected to a plug.

[0030] The first ultrasonic transducer, the second ultrasonic transducer, the first pressure sensor, and the second pressure sensor can be powered via the plug.

[0031] Furthermore, a handle is also connected to the conduit seat, and a first cable adjustment mechanism and a second cable adjustment mechanism are installed on the handle.

[0032] Thus, the first pull-line adjustment mechanism can pull the first pull-line back and fix its position, and the second pull-line adjustment mechanism can pull the second pull-line back and fix its position.

[0033] Furthermore, the inner diameter of the second proximal channel and the inner diameter of the second distal channel are equal and their inner sidewalls are flush; the diameter of the second sealing unit is equal to the inner diameter of the second proximal channel.

[0034] Furthermore, the distal opening of the first fluid supply channel and the distal opening of the first recovery channel are both connected to the space inside the first balloon.

[0035] Furthermore, the liquid outlet is connected to the space inside the second balloon.

[0036] Furthermore, the distal opening of the first liquid supply channel is closer to the distal end of the inner tube than the distal opening of the first recovery channel.

[0037] Furthermore, the first and second sealing sleeves are made of rubber material.

[0038] Furthermore, both the first and second balloons are compliant balloons.

[0039] By adjusting the pressure, the size of the balloon can be slightly controlled, thereby achieving better ablation.

[0040] Furthermore, the inner tube has two first positioning rings, and the first balloon is located between the two first positioning rings; both the inner tube and the outer tube have a second positioning ring, and the second balloon is located between the two second positioning rings.

[0041] Thus, the first balloon can be positioned using two first positioning rings, and the second balloon can be positioned using two second positioning rings.

[0042] Furthermore, a first pressure sensor is provided on the inner wall of the first balloon and the outer wall of the inner tube, both located inside the first balloon; a second pressure sensor is provided on the inner wall of the second balloon and the outer wall of the inner tube, both located inside the second balloon.

[0043] Furthermore, the inner tube has two first pressure sensors, one located near the far end of the first liquid supply channel and the other located near the far end of the first recovery channel.

[0044] Furthermore, the inner tube has two second pressure sensors, one located near the outlet of the second liquid supply channel and the other located near the far end of the second recovery channel (i.e., in front of the far end of the outer tube).

[0045] This allows for more accurate monitoring of the pressure inside the first and second balloons.

[0046] Beneficial effects:

[0047] 1. The ultrasound ablation catheter of this application has a first balloon and a second balloon, and the two balloons are of different sizes, so that a suitable balloon can be selected in blood vessels of different sizes to achieve more appropriate ablation.

[0048] 2. The ultrasonic ablation catheter of this application allows for fine-tuning of the internal fluid volume of the selected balloon after selecting one for use, thereby fine-tuning the size of the balloon and achieving better ablation results. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of an ultrasonic ablation catheter.

[0050] Figure 2 This is a magnified view of region A;

[0051] Figure 3 This is a schematic diagram of the ultrasound ablation catheter from another angle.

[0052] Figure 4 This is a magnified view of region B.

[0053] Figure 5 This is a schematic diagram of the cross-section of an ultrasonic ablation catheter;

[0054] Figure 6 This is a magnified view of region C;

[0055] Figure 7 This is a magnified view of region D;

[0056] Figure 8 This is a schematic diagram of another cross-section of the ultrasonic ablation catheter;

[0057] Figure 9 This is a magnified view of region E.

[0058] To make it clear, Figure 3-8 The first and second balloons were concealed.

[0059] Explanation of reference numerals in the attached drawings: Inner tube 1; First recovery channel 1.1; Second recovery channel 1.2; First proximal channel 1.3; First distal channel 1.4; Connecting channel 1.5; Side hole 1.6; First sealing sleeve 1.7; Second proximal channel 1.8; Liquid outlet 1.9; Second distal channel 1.10; U-shaped connecting channel 1.11; Proximal annular protrusion 1.12; Distal annular protrusion 1.13; Second sealing sleeve 1.14; Outer tube 2; First balloon 3; Second balloon 4; First ultrasonic transducer 5; Second ultrasonic transducer 6; First partition 7; First pull wire channel 7.1; First pull wire 7.2; First spring 7.3; Frustum-shaped block 7.4; Movable column 7.5; Connecting rod 7.6; Movable sleeve 7.7; Second partition 8; Second pull wire channel 8.1; Second pull wire 8.2; Second spring 8.3; Second sealing unit 8.4. Detailed Implementation

[0060] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0061] This invention provides an ultrasonic ablation catheter with a dual-transducer ablation structure, as shown in the figure. It includes an inner tube 1, an outer tube 2, a first balloon 3, a second balloon 4, a first ultrasonic transducer 5 installed in the inner tube 1 and surrounded by the first balloon 3, and a second ultrasonic transducer 6 installed in the inner tube 1 and surrounded by the second balloon 4. The distal and proximal ends of the first balloon 3 are connected to the inner tube 1. The distal end of the second balloon 4 is connected to the inner tube 1, and the proximal end is connected to the distal end of the outer tube 2. The inner tube 1 has a first fluid supply channel, a first recovery channel 1.1, and a second fluid supply channel within its sidewall. The space between the inner tube 1 and the outer tube 2 forms the second recovery channel 1.2. The first fluid supply channel supplies fluid to the first balloon 3, the first recovery channel 1.1 recovers fluid from the first balloon 3, the second fluid supply channel supplies fluid to the second balloon 4, and the second recovery channel 1.2 recovers fluid from the second balloon 4. The volume of the first balloon 3 when inflated is smaller than the volume of the second balloon 4 when inflated. The inner tube 1 has a first partition 7 fixedly connected to the inner wall of the inner tube 1, forming a first pull-wire channel 7.1 between the first partition 7 and the inner tube 1. The first liquid supply channel includes a first proximal channel 1.3, a first distal channel 1.4, and a connecting channel 1.5 connecting the first proximal channel 1.3 and the first distal channel 1.4. The inner tube 1 has a side hole 1.6 communicating with the space inside the second balloon 4 and the connecting channel 1.5, and a first pull-wire perforation communicating with the first distal channel 1.4 and the first pull-wire channel 7.1. A first sealing sleeve 1 through which the first pull-wire 7.2 passes is fixed in the first pull-wire perforation. 7; The connecting channel 1.5 includes a cylindrical portion and a frustum-shaped portion. A first sealing unit connected to the first pull wire 7.2 is installed in the connecting channel. The first sealing unit is connected to the proximal end of the connecting channel 1.5 via a first spring 7.3. The first sealing unit includes a frustum-shaped block 7.4 capable of sealing the frustum-shaped portion, a movable column 7.5 connected to the frustum-shaped block 7.4, and a movable sleeve 7.7 connected to the movable column 7.5 via multiple connecting rods 7.6. When there is no external force, the frustum-shaped block 7.4 does not seal the connecting channel 1.5, and the movable sleeve 7.7 seals the side hole 1.6. There are multiple connecting rods 7.6, which are divided into two circles, and the multiple connecting rods 7.6 in each circle are distributed in a ring at equal intervals. The frustum-shaped block 7.4 is connected to the distal end of the first pull wire 7.2.

[0062] The inner tube 1 has a second partition 8 fixedly connected to the inner sidewall of the inner tube 1, forming a second pull-wire channel 8.1 between the second partition 8 and the inner tube 1; the second fluid supply channel includes a second proximal channel 1.8 and a fluid outlet 1.9 connecting the inner space of the second balloon 4 and the second proximal channel 1.8; the inner tube 1 has a second distal channel 1.10 communicating with the second proximal channel 1.8 and a U-shaped connecting channel 1.11 connecting the second proximal channel 1.8 and the second distal channel 1.10; a proximal annular protrusion 1.12 is fixed inside the second proximal channel 1.8, and the second distal channel... A distal annular protrusion 1.13 is fixed inside the inner tube 1.10. A proximal annular protrusion 1.12 is connected to a cylindrical second sealing unit 8.4 via a second spring 8.3. The second sealing unit 8.4 is connected to a second pull wire 8.2. The side wall of the inner tube 1 has a second pull wire through hole connecting the second proximal channel 1.8 and the second pull wire channel 8.1. A second sealing sleeve 1.14, through which the second pull wire 8.2 passes, is fixed inside the second pull wire through hole. When there is no external force, the second sealing unit 8.4 abuts against the distal annular protrusion 1.13, sealing the second distal channel 1.10 and the distal end of the U-shaped connecting channel 1.11. The inner diameter of the second proximal channel 1.8 is equal to the inner diameter of the second distal channel 1.10, and their inner sidewalls are flush. The diameter of the second sealing unit 8.4 is equal to the inner diameter of the second proximal channel 1.8.

[0063] The first sealing sleeve 1.7 and the second sealing sleeve 1.14 are made of rubber material. A pointed tube is fixed to the front end of the inner tube 1. Both the first balloon 3 and the second balloon 4 are compliant balloons. The inner tube 1 has two first positioning rings, with the first balloon 3 located between the two first positioning rings; both the inner tube 1 and the outer tube 2 have a second positioning ring, with the second balloon 4 located between the two second positioning rings. A first pressure sensor is provided on the inner wall of the first balloon 3 and the outer wall of the inner tube 1, both located within the first balloon 3; a second pressure sensor is provided on the inner wall of the second balloon 4 and the outer wall of the inner tube 1, both located within the second balloon 4. The inner tube 1 has two first pressure sensors, one located near the distal end of the first fluid supply channel and the other near the distal end of the first recovery channel 1.1. The inner tube 1 has two second pressure sensors, one located near the outlet hole 1.9 of the second fluid supply channel and the other near the distal end of the second recovery channel 1.2.

[0064] Working principle: As shown in the figure, the ultrasonic ablation catheter of this application has a first balloon whose size after inflation is smaller than that of the second balloon. Both the first and second balloons are compliant balloons, allowing for slight adjustment of the balloon size by regulating the amount of fluid, thus achieving better ablation. Furthermore, the positioning ring enables the positioning of the first and second balloons.

[0065] When the required balloon is selected based on the vascular requirements, for example, when the first balloon is selected for ablation, the first supply channel inflates the balloon with fluid, and after inflation, the fluid supply rate of the first supply channel and the retrieval rate of the first retrieval channel are kept consistent to maintain the stability of the first balloon size. At this time, the first occlusion unit in the first supply channel does not block the connecting channel, so the first supply channel can supply fluid normally. The second balloon, the second supply channel, and the second retrieval channel are not used at this time. However, when it is necessary to adjust the size of the first balloon, the second pull wire can be pulled back, causing the second occlusion unit to come into contact with the proximal annular protrusion, thus blocking the fluid outlet. The U-shaped connecting channel connects the second proximal channel and the second distal channel. At this time, fluid can be injected through the second supply channel to enlarge the first balloon (fluid is injected into the first balloon through the second proximal channel, the U-shaped connecting channel, and the second distal channel), or fluid can be withdrawn to shrink the first balloon (fluid is withdrawn from the first balloon through the second distal channel, the U-shaped connecting channel, and the second proximal channel). The size of the first balloon can be adjusted by injecting or withdrawing liquid through the second liquid supply channel. This maintains a constant flow rate in both the first liquid supply channel and the first recovery channel (resulting in more stable coolant circulation). Instead of relying on adjusting the liquid flow rate within the first balloon to regulate its size, the size of the first balloon can be independently adjusted via the second liquid supply channel, resulting in higher precision and more intuitive and convenient adjustment.

[0066] When the second balloon is selected for ablation, the second fluid supply channel inflates the balloon, and after inflation, the fluid supply rate of the second fluid supply channel and the recovery rate of the second recovery channel remain consistent, thus maintaining the stability of the second balloon size. At this time, since the second sealing unit does not block the outlet, the second fluid supply channel can supply fluid normally. Furthermore, the first fluid supply channel and the first recovery channel are not used at this time. During the circulating cooling process of the second balloon, when it is necessary to adjust the size of the second balloon, the first pull wire can be pulled back, causing the frustum-shaped block to seal the frustum-shaped portion of the connecting channel. At this time, the first fluid supply channel is blocked, but the side hole is exposed, allowing the first fluid supply channel to communicate with the internal space of the second balloon through the side hole. Therefore, the size of the second balloon can be adjusted by injecting or withdrawing fluid through the side hole. This allows the flow rates of the second supply channel and the second recovery channel to remain constant (resulting in more stable coolant circulation). Instead of relying on adjusting the liquid flow rate inside the second balloon to adjust its size, the size of the second balloon can be independently adjusted through the first supply channel, resulting in higher precision and more intuitive and convenient adjustment.

[0067] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes and modifications can be made to the present invention without departing from the scope defined by the claims.

Claims

1. An ultrasonic ablation catheter with a dual-transducer ablation structure, characterized in that, The device includes an inner tube, an outer tube, a first balloon, a second balloon, a first ultrasonic transducer installed in the inner tube and surrounded by the first balloon, and a second ultrasonic transducer installed in the inner tube and surrounded by the second balloon. The distal and proximal ends of the first balloon are connected to the inner tube, and the distal end of the second balloon is connected to the inner tube, while the proximal end is connected to the distal end of the outer tube. The inner tube has a first fluid supply channel, a first retrieval channel, and a second fluid supply channel within its sidewall. The space between the inner and outer tubes forms the second retrieval channel. The first fluid supply channel can supply fluid to the first balloon, and the first retrieval channel can retrieve fluid from the first balloon. The second fluid supply channel can supply fluid to the second balloon, and the second retrieval channel can retrieve fluid from the second balloon.

2. The ultrasonic ablation catheter with a dual-transducer ablation structure according to claim 1, characterized in that, The inner tube has a first partition fixedly connected to the inner wall of the inner tube, and a first pull-wire channel is formed between the first partition and the inner tube. The first liquid supply channel includes a first proximal channel, a first distal channel, and a connecting channel connecting the first proximal channel and the first distal channel. The inner tube has a side hole communicating with the space inside the second balloon and the connecting channel, and a first pull-wire through hole communicating with the first distal channel and the first pull-wire channel. A first sealing sleeve through which the first pull-wire passes is fixed in the first pull-wire through hole. The connecting channel includes a cylindrical part and a frustum-shaped part. A first sealing unit connected to the first pull-wire is installed in the connecting channel. The first sealing unit is connected to the proximal end of the connecting channel by a first spring. The first sealing unit includes a frustum-shaped block capable of sealing the frustum-shaped part, a movable column connected to the frustum-shaped block, and a movable sleeve connected to the movable column by multiple connecting rods. When there is no external force, the frustum-shaped block does not seal the connecting channel and the movable sleeve seals the side hole.

3. The ultrasonic ablation catheter with a dual-transducer ablation structure according to claim 2, characterized in that, The connecting rods are multiple and divided into two rings, with the multiple connecting rods in each ring being distributed in a ring at equal intervals; the frustum-shaped block is connected to the far end of the first pull wire.

4. The ultrasonic ablation catheter with a dual-transducer ablation structure according to claim 1, characterized in that, The inner tube has a second partition fixedly connected to the inner sidewall of the inner tube, forming a second pull-wire channel between the second partition and the inner tube; the second liquid supply channel includes a second proximal channel and a liquid outlet connecting the inner space of the second balloon and the second proximal channel; the inner tube has a second distal channel communicating with the second proximal channel and a U-shaped connecting channel connecting the second proximal channel and the second distal channel; a proximal annular protrusion is fixed in the second proximal channel, and a distal annular protrusion is fixed in the second distal channel; the proximal annular protrusion is connected to a cylindrical second sealing unit via a second spring; the second sealing unit is connected to a second pull wire; the inner tube has a second pull-wire through-hole connecting the second proximal channel and the second pull-wire channel; a second sealing sleeve through which the second pull wire passes is fixed in the second pull-wire through-hole; when there is no external force, the second sealing unit abuts against the distal annular protrusion, sealing the second distal channel and sealing the distal end of the U-shaped connecting channel.

5. The ultrasonic ablation catheter with a dual-transducer ablation structure according to claim 4, characterized in that, The inner diameter of the second proximal channel is equal to the inner diameter of the second distal channel, and their inner sidewalls are flush; the diameter of the second sealing unit is equal to the inner diameter of the second proximal channel.

6. The ultrasonic ablation catheter with a dual-transducer ablation structure according to claim 4, characterized in that, The first and second sealing sleeves are made of rubber material.

7. The ultrasonic ablation catheter with a dual-transducer ablation structure according to claim 4, characterized in that, The inner tube has a pointed tip fixed to its front end.

8. The ultrasonic ablation catheter with a dual-transducer ablation structure according to claim 1, characterized in that, Both the first and second balloons are compliant balloons.

9. The ultrasonic ablation catheter with a dual-transducer ablation structure according to claim 1, characterized in that, The inner tube has two first positioning rings, and the first balloon is located between the two first positioning rings; both the inner tube and the outer tube have a second positioning ring, and the second balloon is located between the two second positioning rings.

10. The ultrasonic ablation catheter with a dual-transducer ablation structure according to claim 1, characterized in that, The inner wall of the first balloon and the outer wall of the inner tube are each provided with a first pressure sensor located inside the first balloon; the inner wall of the second balloon and the outer wall of the inner tube are each provided with a second pressure sensor located inside the second balloon.

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