Intravascular ultrasonic ablation tube device and ablation equipment

Abstract

The utility model provides an intravascular ultrasonic ablation tube device and ablation equipment. The intravascular ultrasonic ablation tube device comprises an outer tube, an inner tube, a cable connector, a guide wire connector, a balloon assembly, an ultrasonic transducer and a tail end tube. The outer pipe is internally divided into a liquid inlet cavity, a liquid outlet cavity and a hollow cavity which is coaxial with the outer pipe; one end of the balloon assembly sleeves the end part of the outer tube, and the other end of the balloon assembly sleeves the tail end tube; the inner tube penetrates through the hollow cavity, the guide wire penetrates through the inner tube, one end of the guide wire extends into the tail end tube, and the other end of the guide wire extends out of the outer tube and is connected with the guide wire connector; the ultrasonic transducer is arranged on the inner pipe in a sleeving mode, and a cable is arranged in the liquid inlet cavity and / or the liquid outlet cavity in a penetrating mode. An independent cable cavity does not need to be arranged to be separated from the liquid channel, the sectional area of the liquid channel is increased, and liquid flow helps heat dissipation of the cable. The inner tube is arranged in the middle of the outer tube, and the problem of axial eccentricity of the balloon assembly and the ultrasonic transducer is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrasonic ablation, and in particular to an intravascular ultrasonic ablation tube device and ablation equipment. Background Art

[0002] Medical ablation technology is different from conventional surgical treatment. It uses various energies to kill the tissue itself or reduce its function, including laser ablation, radiofrequency ablation, ultrasonic ablation, microwave ablation, etc. Ablation equipment can treat tissues in vitro or in blood vessels or other cavities. At present, the most widely used is in vivo radiofrequency ablation, which mainly targets adjacent tissues of the lumen, such as lumen walls (for example, blood vessel walls) and peripheral nerves. Due to the characteristics of radiofrequency energy, it is necessary to fit the tissue during treatment. Local high temperature can easily cause tissue damage. If it occurs in blood vessels, it will cause stenosis, hyperplasia, etc. In addition, since the heat source of radiofrequency treatment is generally point-covered, a large treatment area requires multiple ablations, which will cause some lesions to be missed, affecting the treatment effect. Compared with radiofrequency ablation, ultrasonic ablation can make up for these two defects. The principle of ultrasonic ablation is to allow ultrasonic waves in vitro or in vivo to act on tissues through coupling objects, increase the temperature of tissues within a certain period of time, cause necrosis or damage of lesion cells, and achieve the purpose of treatment.

[0003] At present, the guidewire cavity and the outer tube in the intravascular ultrasonic ablation catheter device are not concentric, and the balloon at the distal end of the catheter is not on the same axis as the catheter body, which will have certain disadvantages on the treatment permeability.

[0004] In view of this, it is necessary to propose an intravascular ultrasonic ablation tube device to solve the above problems. Utility Model Content

[0005] The utility model aims to provide an intravascular ultrasonic ablation tube device and an ablation apparatus, which are used to improve the problem that the balloon at the distal end of the existing catheter is not on the same axis as the catheter body, which has certain disadvantages on the treatment permeability.

[0006] The utility model provides an intravascular ultrasonic ablation tube device, comprising: an outer tube, an inner tube, a cable connector, a guide wire connector, a balloon assembly, an ultrasonic transducer and a terminal tube. The outer tube is divided into a liquid inlet cavity, a liquid outlet cavity and a hollow cavity coaxially arranged with the outer tube. The balloon assembly is hollow inside, one end of the balloon assembly is sleeved on the end of the outer tube, and the other end is sleeved on the terminal tube. The inner tube is inserted into the hollow cavity, the inner tube partially extends out of the outer tube and is inserted into the balloon assembly, the inner tube is coaxially arranged with the balloon assembly and communicated with the terminal tube, the guide wire is inserted into the inner tube, one end of the guide wire extends into the terminal tube, and the other end extends out of the outer tube and is connected to the guide wire connector. The ultrasonic transducer is sleeved on the inner tube, and a cable is inserted into the liquid inlet cavity and / or the liquid outlet cavity, one end of the cable extends into the balloon assembly and is connected to the ultrasonic transducer, and the other end extends out of the outer tube and is connected to the cable connector.

[0007] In a possible embodiment, the ultrasonic transducer includes an inner support tube, an outer support tube and a piezoelectric ceramic tube located in the balloon assembly. The inner support tube is sleeved on the inner tube, the outer support tube is sleeved on the inner support tube, and a closed cavity is formed between the outer support tube and the inner support tube. The piezoelectric ceramic tube is sleeved on the inner support tube, and a circulation space is formed between the piezoelectric ceramic tube and the outer support tube, and the circulation space is connected to the inside of the balloon assembly to circulate liquid.

[0008] In a possible embodiment, the inner surface of the piezoelectric ceramic cylinder is a negative electrode and the outer surface is a positive electrode, and the inner support tube and the outer support tube are negative electrodes. The cable is a coaxial cable and includes a conductor and a shielding layer, the conductor part extends out of the outer tube and is connected to the outer surface of the piezoelectric ceramic cylinder, and the shielding layer part extends out of the outer tube and is connected to the inner support tube.

[0009] In a possible embodiment, the outer wall of the inner support tube is provided with a first ring and a second ring, the first ring and the second ring are arranged at intervals and adapted to the outer support tube, the outer support tube is provided on the first ring and the second ring, and the closed cavity is formed between the inner support tube, the outer support tube, the first ring, and the second ring.

[0010] In a possible embodiment, the inner support tube has a first end close to the outer tube and a second end away from the outer tube. There is a distance between the first collar and the first end, the end face of the second collar is flush with the end face of the second end, and the two end faces of the outer support tube are respectively flush with the end face of the first collar and the end face of the second collar. And / or, the two end faces of the outer support tube are respectively flush with the two end faces of the piezoelectric ceramic tube.

[0011] In a possible embodiment, a mounting piece is sleeved on the outer wall of the outer support tube, and the mounting piece abuts against the inner surface of the piezoelectric ceramic tube to achieve an interference fit between the piezoelectric ceramic tube and the outer support tube.

[0012] In a possible embodiment, the mounting member is a pair and is located at the two ends of the outer pillar tube, the mounting member is plate-shaped, and the edge of the mounting member has at least two abutting portions arranged at intervals and a connecting portion connected between two adjacent abutting portions, the abutting portion abuts against the inner surface of the piezoelectric ceramic tube, and a gap for the circulation of liquid is formed between the connecting portion and the inner surface of the piezoelectric ceramic tube. Alternatively, the mounting member is in two groups and is located at the two ends of the outer pillar tube, each group of the mounting members is at least two and is arranged at intervals along the circumference of the outer pillar tube.

[0013] In a possible embodiment, the intravascular ultrasonic ablation tube device further includes a pair of developing rings sleeved on the inner tube and located in the balloon assembly, and the pair of developing rings are respectively located on both sides of the ultrasonic transducer.

[0014] In a possible embodiment, an isolation tube and a pair of isolation plates are provided inside the outer tube, the isolation tube is coaxially arranged with the outer tube, the isolation plate is fixedly connected between the isolation tube and the outer tube, and the pair of isolation plates are symmetrically distributed on the isolation tube.

[0015] In addition, the utility model also provides an intravascular ultrasonic ablation device, including: a main unit, a liquid delivery component, and an intravascular ultrasonic ablation tube device as in any of the above embodiments.

[0016] The beneficial effects of the intravascular ultrasonic ablation tube device provided by the utility model are: there is no need to set up a separate cable cavity and liquid channel, the cross-sectional area of ​​the liquid channel is increased, and the liquid flow helps the cable to dissipate heat. The inner tube is centrally arranged in the outer tube, and the balloon assembly and the ultrasonic transducer have no axial eccentricity problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the intravascular ultrasonic ablation tube device of the present invention.

[0018] Figure 2 It is a schematic diagram of the balloon assembly and ultrasonic transducer in the intravascular ultrasonic ablation tube device of the utility model.

[0019] Figure 3 It is a three-dimensional cross-sectional view of the ultrasonic transducer in the intravascular ultrasonic ablation tube device of the utility model.

[0020] Figure 4It is a circumferential cross-sectional view of the ultrasonic transducer in the intravascular ultrasonic ablation device of the utility model.

[0021] Figure 5 It is a radial cross-sectional view of the ultrasonic transducer in the intravascular ultrasonic ablation device of the utility model.

[0022] Figure 6 This is an exploded view of the ultrasonic transducer in the intravascular ultrasonic ablation tube device of the present invention.

[0023] Figure 7 It is a schematic diagram of an outer support tube in another embodiment of the intravascular ultrasonic ablation tube device of the utility model.

[0024] Figure 8 It is a cross-sectional view of the ultrasonic transducer, the outer tube and the inner tube in the intravascular ultrasonic ablation tube device of the utility model.

[0025] Fig. 9 It is a schematic diagram of the outer tube in the intravascular ultrasonic ablation tube device of the present invention.

[0026] Fig.10 It is a stereoscopic diagram of the cable passing through the outer tube of the intravascular ultrasonic ablation tube device of the present invention.

[0027] Fig.11 This is a cross-sectional view of the cable passing through the outer tube of the intravascular ultrasonic ablation tube device of the present invention.

[0028] Fig.12 It is a schematic diagram of the intravascular ultrasonic ablation device of the present invention.

[0029] Explanation of the reference numerals: ablation tube device 100; outer tube 110; liquid inlet cavity 111; liquid outlet cavity 112; hollow cavity 113; isolation tube 114; isolation plate 115; inner tube 120; cable connector 130; guidewire connector 140; balloon assembly 150; ultrasonic transducer 160; inner support tube 161; first ring 1611; second ring 1612; first end 1613; second end 1614; outer support tube 162; mounting member 1621; abutment portion 16211; connecting portion 16212; piezoelectric ceramic tube 163; circulation space 164; enclosed cavity 165; developing ring 170; terminal tube 180; cable 190; conductor 191; shielding layer 192; main unit 200; liquid delivery assembly 300. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] In view of the problems existing in the prior art, the embodiment of the present utility model provides an intravascular ultrasonic ablation tube device, see Figure 1 and Figure 2 The intravascular ultrasonic ablation tube device 100 includes: an outer tube 110, an inner tube 120, a cable connector 130, a guide wire connector 140, a balloon assembly 150, an ultrasonic transducer 160 and a terminal tube 180. Fig.10 and Fig.11 The outer tube 110 is divided into a liquid inlet chamber 111, a liquid outlet chamber 112, and a hollow chamber 113 coaxially arranged with the outer tube 110. Figure 2 The balloon assembly 150 is hollow inside, one end of the balloon assembly 150 is sleeved on the end of the outer tube 110, and the other end is sleeved on the terminal tube 180. Figure 1 and Figure 8 The inner tube 120 is adapted to the hollow cavity 113, and the inner tube 120 is inserted into the hollow cavity 113. The inner tube 120 partially extends out of the outer tube 110 and is inserted into the balloon assembly 150. The inner tube 120 is coaxially arranged with the balloon assembly 150 and is connected with the terminal tube 180. The guide wire is inserted into the inner tube 120, one end of the guide wire extends into the terminal tube 180, and the other end extends out of the outer tube 110 and is connected to the guide wire connector 140. The ultrasonic transducer 160 is sleeved on the inner tube 120, and the cable 190 is inserted into the liquid inlet cavity 111 and / or the liquid outlet cavity 112. One end of the cable 190 extends into the balloon assembly 150 and is connected to the ultrasonic transducer 160, and the other end extends out of the outer tube 110 and is connected to the cable connector 130. Specifically, the inner tube 120 is sealedly connected to the hollow cavity 113 (for example, by bonding, welding, or hot melting), one end of the balloon assembly 150 is sealedly connected to the end of the outer tube 110, and the other end of the balloon assembly 150 is sealedly connected to the terminal tube 180 (for example, by bonding, hot welding, etc.).

[0032] In this embodiment, the outer tube 110, the inner tube 120, and the balloon assembly 150 are coaxially arranged to avoid the accuracy and stability of the operation being affected by the bending or twisting of the outer tube 110 and the balloon assembly 150 in a complex vascular environment. The balloon and the transducer have no axial eccentricity, so that the ultrasonic energy can be transmitted to the balloon surface more evenly, avoiding the uneven energy distribution caused by eccentricity, so as to achieve comprehensive and uniform ablation of the diseased tissue and improve the treatment effect. The design without axial eccentricity allows the balloon to fit the blood vessel wall more evenly when expanding, reducing the damage to the blood vessel wall caused by the irregular shape or position deviation of the balloon, which helps to reduce the risk of complications during treatment and improve safety.

[0033] In a preferred embodiment, see Figures 2 to 4 The ultrasonic transducer 160 provides a powerful energy source for ablation therapy, and the ultrasonic transducer 160 includes an inner support tube 161, an outer support tube 162, and a piezoelectric ceramic tube 163 located in the balloon assembly 150. The inner support tube 161 is sleeved on the inner tube 120, the outer support tube 162 is sleeved on the inner support tube 161, and a closed cavity 165 is formed between the outer support tube 162 and the inner support tube 161. The piezoelectric ceramic tube 163 is sleeved on the inner support tube 161, and a circulation space 164 is formed between the piezoelectric ceramic tube 163 and the outer support tube 162, and the circulation space 164 is connected to the inside of the balloon assembly 150 to circulate liquid.

[0034] In a specific embodiment, see Figures 3 to 6 , the inner surface of the piezoelectric ceramic tube 163 is the negative pole and the outer surface is the positive pole, and the inner support tube 161 and the outer support tube 162 are the negative poles. The cable 190 is a coaxial cable and includes a conductor 191 and a shielding layer 192. The conductor 191 partially extends out of the outer tube 110 and is connected to the outer surface of the piezoelectric ceramic tube 163, and the shielding layer 192 partially extends out of the outer tube 110 and is connected to the inner support tube 161. Specifically, the inner and outer surfaces of the piezoelectric ceramic tube 163 are plated, and the inner and outer support tubes 161 and 162 are brass parts. In this embodiment, the conductor 191 is connected to the outer surface of the piezoelectric ceramic tube 163, and the shielding layer 192 is connected to the inner support tube 161, which ensures that the ultrasonic transducer 160 is reliably electrically connected during operation and reduces electrical interference and signal loss.

[0035] In a preferred embodiment, see Figure 4 and Figure 6The outer wall of the inner pillar tube 161 is sleeved with a first ring 1611 and a second ring 1612. The first ring 1611 and the second ring 1612 are arranged at intervals and matched with the outer pillar tube 162. The outer pillar tube 162 is sleeved on the first ring 1611 and the second ring 1612. A closed cavity 165 is formed between the inner pillar tube 161, the outer pillar tube 162, the first ring 1611, and the second ring 1612. Specifically, the first ring 1611 and the second ring 1612 can be integrally formed with the outer pillar tube 162 or fixedly connected. In this embodiment, the first ring 1611 and the second ring 1612 on the outer wall of the inner pillar tube 161, on the one hand, realize the close connection between the inner pillar tube 161 and the outer pillar tube 162, and on the other hand, a closed cavity 165 is formed between the inner pillar tube 161 and the outer pillar tube 162.

[0036] In some possible embodiments, see Figure 3 and Figure 4 The inner pillar tube 161 has a first end 1613 close to the outer tube 110 and a second end 1614 away from the outer tube 110. There is a gap between the first collar 1611 and the first end 1613, the first end 1613 is connected to the shielding layer 192, the end surface of the second collar 1612 is flush with the end surface of the second end 1614, and the two end surfaces of the outer pillar tube 162 are respectively flush with the end surface of the first collar 1611 and the end surface of the second collar 1612. And / or, the two end surfaces of the outer pillar tube 162 are respectively flush with the two end surfaces of the piezoelectric ceramic tube 163.

[0037] In a preferred embodiment, see Figure 6 The outer wall of the outer support tube 162 is provided with a mounting piece 1621, and the mounting piece 1621 abuts against the inner surface of the piezoelectric ceramic tube 163 to make the piezoelectric ceramic tube 163 and the outer support tube 162 have an interference fit. Specifically, the mounting piece 1621 can be integrally formed with the outer support tube 162 or fixedly connected. The mounting piece 1621 realizes an interference fit between the piezoelectric ceramic tube 163 and the outer support tube 162, ensuring a tight connection between the two. This tight connection can effectively prevent vibration or displacement that may occur during use, and enhance the structural stability of the entire ultrasonic transducer 160.

[0038] In one embodiment, see Figure 6 The mounting member 1621 is a pair and is located at both ends of the outer support tube 162. The mounting member 1621 is plate-shaped. The edge of the mounting member 1621 has at least two abutting portions 16211 arranged at intervals and a connecting portion 16212 connected between two adjacent abutting portions 16211. The abutting portions 16211 abut against the inner surface of the piezoelectric ceramic tube 163. A gap for the circulation of liquid is formed between the connecting portion 16212 and the inner surface of the piezoelectric ceramic tube 163. Alternatively, in another embodiment, see Figure 7, the mounting members 1621 are in two groups and are located at the two ends of the outer support tube 162, and each group of mounting members 1621 is at least two and are arranged at intervals along the circumference of the outer support tube 162. In this embodiment, on the one hand, the mounting members 1621 are used to enhance the connection stability between the piezoelectric ceramic tube 163 and the outer support tube 162, and on the other hand, the interference fit design reduces the loss of energy during the transmission process, improves the energy transmission efficiency, and helps to convert more electrical energy into effective ultrasonic energy, thereby improving the treatment effect. The gap formed between the mounting members 1621 and the piezoelectric ceramic tube 163 allows liquid to flow, which helps to dissipate the heat generated by the transducer during operation in a timely manner, prevents overheating, and improves the service life of the transducer.

[0039] In one specific embodiment, see Figure 8 The intravascular ultrasonic ablation tube device 100 further includes a pair of developing rings 170 sleeved on the inner tube 120 and located in the balloon assembly 150, and the pair of developing rings 170 are respectively located on both sides of the ultrasonic transducer 160. The design of the developing rings 170 can more accurately locate the position of the ultrasonic transducer 160, avoid damage to non-target tissues, and thus improve the accuracy and safety of the operation.

[0040] In a preferred embodiment, see Figures 9 to 11 , an isolation tube 114 and a pair of isolation plates 115 are provided in the outer tube 110, the isolation tube 114 is coaxially arranged with the outer tube 110, the isolation plate 115 is fixedly connected between the isolation tube 114 and the outer tube 110, and the pair of isolation plates 115 are symmetrically distributed on the isolation tube 114. Specifically, the outer tube 110, the isolation tube 114, and the isolation plate 115 can be integrally formed or fixedly connected, the liquid inlet cavity 111 and the liquid outlet cavity 112 are symmetrically arranged, and a cable 190 is respectively arranged in the liquid inlet cavity 111 and the liquid outlet cavity 112, and the cable 190 in the liquid inlet cavity 111 is symmetrically arranged with the cable 190 in the liquid outlet cavity 112. In this embodiment, the cable 190 is arranged in the liquid inlet cavity 111 and the liquid outlet cavity 112, and there is no need to set up a separate cable 190 cavity to separate the liquid channel, increase the cross-sectional area of ​​the liquid channel, and use the liquid flow to help the cable 190 dissipate heat, which can effectively prevent the cable 190 from being damaged or performance degradation due to overheating during operation.

[0041] Also, see Fig.12The utility model also provides an intravascular ultrasonic ablation device, comprising: a host 200, a liquid delivery component 300, and an intravascular ultrasonic ablation tube device 100 as in any of the above embodiments. The host 200 is connected to the cable connector 130 to provide energy to the intravascular ultrasonic ablation tube device 100, so as to achieve the therapeutic purpose of ablation by the ablation catheter in vivo. The liquid delivery component 300 is connected to the liquid inlet cavity 111 through a first pipeline, and the liquid delivery component 300 is connected to the liquid outlet cavity 112 through a second pipeline to provide a circulating water circuit. The liquid is transported from the liquid inlet cavity 111 at the proximal end of the outer tube 110 to the distal end of the outer tube 110 through the first pipeline. The liquid flows into the liquid outlet cavity 112 at the distal end of the outer tube 110 through the balloon component 150, and is transported back to the proximal end of the outer tube 110 and flows out from the second pipeline, completing a liquid flow process.

[0042] Although the embodiments of the utility model are described in detail above, it is obvious to those skilled in the art that various modifications and changes can be made to these embodiments. However, it should be understood that such modifications and changes are within the scope and spirit of the utility model in the claims. Moreover, the utility model described herein may have other embodiments and may be implemented or realized in a variety of ways. Unless otherwise defined, the technical terms or scientific terms used herein should be understood by people with ordinary skills in the field to which the utility model belongs. The words "including" and the like used herein mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

Claims

1. An intravascular ultrasonic ablation tube device, characterized in that: include: outer tube, inner tube, cable connector, guidewire connector, balloon assembly, ultrasonic transducer, and terminal tube; The outer tube is divided into a liquid inlet cavity, a liquid outlet cavity and a hollow cavity coaxially arranged with the outer tube; The balloon assembly is hollow inside, one end of the balloon assembly is sleeved on the end of the outer tube, and the other end is sleeved on the terminal tube; The inner tube is inserted into the hollow cavity, the inner tube partially extends out of the outer tube and is inserted into the balloon assembly, the inner tube is coaxially arranged with the balloon assembly and is connected with the terminal tube, the guide wire is inserted into the inner tube, one end of the guide wire extends into the terminal tube, and the other end extends out of the outer tube and is connected to the guide wire connector; The ultrasonic transducer is sleeved on the inner tube, and a cable is passed through the liquid inlet cavity and / or the liquid outlet cavity. One end of the cable extends into the balloon assembly and is connected to the ultrasonic transducer, and the other end extends out of the outer tube and is connected to the cable connector.

2. The intravascular ultrasonic ablation tube device according to claim 1, characterized in that: The ultrasonic transducer comprises an inner support tube, an outer support tube and a piezoelectric ceramic tube located in the balloon assembly; The inner support tube is sleeved on the inner tube, the outer support tube is sleeved on the inner support tube, and a closed cavity is formed between the outer support tube and the inner support tube; The piezoelectric ceramic tube is sleeved on the inner support tube, and a circulation space is formed between the piezoelectric ceramic tube and the outer support tube. The circulation space is connected with the interior of the balloon assembly to circulate liquid.

3. The intravascular ultrasonic ablation tube device according to claim 2, characterized in that: The inner surface of the piezoelectric ceramic cylinder is a negative electrode and the outer surface is a positive electrode, and the inner support cylinder and the outer support cylinder are negative electrodes; The cable is a coaxial cable and includes a conductor and a shielding layer. The conductor portion extends out of the outer tube and is connected to the outer surface of the piezoelectric ceramic tube, and the shielding layer portion extends out of the outer tube and is connected to the inner support tube.

4. The intravascular ultrasonic ablation tube device according to claim 2, characterized in that: The outer wall of the inner support tube is sleeved with a first ring and a second ring, the first ring and the second ring are arranged at intervals and adapted to the outer support tube, the outer support tube is sleeved on the first ring and the second ring, and the closed cavity is formed between the inner support tube, the outer support tube, the first ring and the second ring.

5. The intravascular ultrasonic ablation tube device according to claim 4, characterized in that: The inner support tube has a first end close to the outer tube and a second end away from the outer tube; There is a distance between the first collar and the first end, the end surface of the second collar is flush with the end surface of the second end, and the two end surfaces of the outer support tube are flush with the end surface of the first collar and the end surface of the second collar respectively; and / or, The two end surfaces of the outer support tube are respectively flush with the two end surfaces of the piezoelectric ceramic tube.

6. The intravascular ultrasonic ablation tube device according to claim 2, characterized in that: The outer wall of the outer support tube is sleeved with a mounting piece, and the mounting piece abuts against the inner surface of the piezoelectric ceramic tube to make the piezoelectric ceramic tube and the outer support tube have an interference fit.

7. The intravascular ultrasonic ablation tube device according to claim 6, characterized in that: The mounting member is a pair and is respectively located at the two ends of the outer support tube, the mounting member is plate-shaped, and the edge of the mounting member has at least two abutting portions arranged at intervals and a connecting portion connected between two adjacent abutting portions, the abutting portion abuts against the inner surface of the piezoelectric ceramic tube, and a gap for circulating liquid is formed between the connecting portion and the inner surface of the piezoelectric ceramic tube; or, The mounting parts are in two groups and are respectively located at two ends of the outer support tube. Each group of mounting parts has at least two mounting parts and are spaced apart along the circumference of the outer support tube.

8. The intravascular ultrasonic ablation tube device according to any one of claims 1 to 7, characterized in that: It also includes a pair of developing rings which are sleeved on the inner tube and located in the balloon assembly, and the pair of developing rings are respectively located on both sides of the ultrasonic transducer.

9. The intravascular ultrasonic ablation tube device according to any one of claims 1 to 7, characterized in that: An isolation tube and a pair of isolation plates are arranged inside the outer tube. The isolation tube is coaxially arranged with the outer tube. The isolation plate is fixedly connected between the isolation tube and the outer tube. The pair of isolation plates are symmetrically distributed on the isolation tube.

10. An intravascular ultrasonic ablation device, characterized in that: include: A host, a liquid delivery component, and an intravascular ultrasonic ablation tube device as described in any one of claims 1-9.

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