Intravascular ablation catheter and ablation system
By dividing the outer tube of the intravascular ablation catheter to form a multi-lumen structure, and integrating cables and guide wires into it, the problems of small waterway cross-sectional area and point-like coverage of radiofrequency heat sources in the existing technology are solved, and more efficient intravascular ablation is achieved. Ablation therapy.
Patent Information
- Application Number
- CN202420612182.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-27
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-03-27
AI Technical Summary
In the existing intravascular ablation system, the water section of the ablation catheter is small, resulting in large water pressure, affecting the treatment performance. The radiofrequency treatment heat source is point-like, resulting in multiple ablations in large areas of the treatment area, which may lead to the leakage of lesions. , affects the treatment effect.
A kind of internal ablation guidance of the blood vessels is designed. By separating the internal tube in the external tube, the inlet cavity, the exit and the mid -vacant cavity are formed, and the cable is worn in the liquid cavity and/or out of the liquid cavity. Silk wearing is set in the internal tube, realizing the integration of waterway and circuit, increasing the cross -sectional area of circulation, and improving the performance of the ablation system.
Without increasing the outer diameter of the catheter, the cross-sectional area of the waterway is increased, the water pressure is reduced, the performance of the ablation system is enhanced, and the efficiency and accuracy of treatment are improved.
Smart Images
Figure CN222383304U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of ablation, and in particular to an intravascular ablation catheter and an ablation system. 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 water circuit and the electric circuit in the ablation catheter of the intravascular ablation system are usually separated. Separate water circuits and electric circuits are set up separately, which makes the cross-sectional area of the water circuit smaller, the cooling liquid circulation channel in the consumables thinner, and the water pressure has a greater impact, which will have a great impact on the therapeutic performance of the ablation catheter.
[0004] In view of this, it is necessary to propose an intravascular ablation catheter and an ablation system to solve the above problems. Utility Model Content
[0005] The utility model aims to provide an intravascular ablation catheter and an ablation system, so as to improve the problem of small water channel cross-sectional area of the existing ablation catheter.
[0006] The utility model provides an intravascular ablation catheter, comprising: an outer tube, an inner tube, a cable connector, a guidewire joint, a balloon assembly and an energy conversion component; the outer tube is divided into a liquid inlet cavity, a liquid outlet cavity and a hollow cavity, a cable is passed through the liquid inlet cavity and / or the liquid outlet cavity, one end of the cable is connected to the energy conversion component and the other end is connected to the cable connector; the inner tube is arranged in the hollow cavity, a guidewire is passed through the inner tube, one end of the guidewire is passed through the balloon assembly and the other end is connected to the guidewire joint.
[0007] In a possible embodiment, a liquid inlet hole and a liquid outlet hole are provided on the outer tube near one end of the cable connector, the liquid inlet hole is connected to the liquid inlet cavity, and the liquid outlet hole is connected to the liquid outlet cavity. A first adapter and a second adapter are provided on the outer tube, the first adapter is connected to the liquid inlet hole, and the second adapter is connected to the liquid outlet hole.
[0008] In a possible embodiment, the first adapter is a first three-way pipe assembly, which includes a first main pipe section and a first branch pipe section arranged on the side of the first main pipe section, the first main pipe section is sleeved and installed on the outer pipe, and the first branch pipe section is connected to the liquid inlet hole.
[0009] In a possible embodiment, the first main pipe section includes a first sleeve, a pair of first elastic pressure pieces and a pair of first locking pieces. The first sleeve includes a first channel located in the middle of the first sleeve and a pair of second channels located at both ends of the first sleeve, the first channel is connected to the second channel and is adapted to the outer tube, and the cross-sectional area of the second channel is larger than the cross-sectional area of the first channel. A pair of first locking pieces are sleeved on the outer tube and are respectively threadedly connected to the pair of second channels. A first accommodating cavity adapted to the first elastic pressure piece is formed in the first locking piece. The first elastic pressure piece is sleeved on the outer tube and is located in the corresponding first accommodating cavity. When the liquid flowing through the outer tube expands, the first elastic pressure piece deforms and expands and presses tightly against the outer tube and the first accommodating cavity to achieve sealing.
[0010] In a possible embodiment, the second adapter is a second three-way pipe assembly, the second three-way pipe assembly includes a second main pipe section and a second branch pipe section arranged on the side of the second main pipe section, the second main pipe section is sleeved and installed on the outer pipe, and the second branch pipe section is connected to the liquid outlet.
[0011] In a possible embodiment, the second main pipe section includes a second sleeve, a pair of second elastic pressure pieces and a pair of second locking pieces. The second sleeve includes a first channel located in the middle of the second sleeve and a pair of second channels located at both ends of the second sleeve, the first channel is connected to the second channel and is adapted to the outer pipe, and the cross-sectional area of the second channel is larger than the cross-sectional area of the first channel. A pair of second locking pieces are sleeved on the outer pipe and are respectively threadedly connected to the pair of second channels. A second accommodating cavity adapted to the second elastic pressure piece is formed in the second locking piece. The second elastic pressure piece is sleeved on the outer pipe and is located in the corresponding second accommodating cavity. When the liquid flowing through the outer pipe expands, the second elastic pressure piece deforms and expands and presses tightly between the outer pipe and the second accommodating cavity to achieve sealing.
[0012] In a possible embodiment, a liquid inlet hole and a liquid outlet hole are provided on the outer tube near one end of the cable connector, the liquid inlet hole is communicated with the liquid inlet cavity, and the liquid outlet hole is communicated with the liquid outlet cavity. A four-way pipe assembly is sleeved and installed on the outer tube, and the four-way pipe assembly is communicated with the liquid inlet cavity and the liquid outlet cavity.
[0013] In a possible embodiment, the four-way pipe assembly includes an intermediate pipe section, a first side pipe section and a second side pipe section, the intermediate pipe section is sleeved and installed on the outer pipe, the first side pipe section is connected to the liquid inlet, and the second side pipe section is connected to the liquid outlet.
[0014] In a possible embodiment, a separation tube and a separation plate are provided inside the outer tube, the separation plate is fixedly connected between the separation tube and the inner tube, and the separation tube and the separation plate are arranged along the length direction of the outer tube. The separation tube is adapted to the inner tube, the inner tube is sealed inside the separation tube, and the two sides of the separation plate are the liquid inlet cavity and the liquid outlet cavity respectively.
[0015] In addition, the utility model also provides an intravascular ablation system, comprising: a main unit, a liquid delivery component and an intravascular ablation catheter as in any of the above embodiments, wherein the liquid supply tube of the liquid delivery component is connected to the liquid inlet cavity, and the liquid return tube of the liquid delivery component is connected to the liquid outlet cavity.
[0016] The beneficial effects of the intravascular ablation catheter provided by the utility model are: a liquid inlet cavity, a liquid outlet cavity and a hollow cavity are arranged in the outer tube, the liquid delivery component delivers liquid to the liquid inlet cavity and recovers liquid flowing out of the liquid outlet cavity, the cable is arranged in the liquid inlet cavity and / or the liquid outlet cavity, and the guide wire is arranged in the inner tube located in the hollow cavity. Such a layout enables the water circuit and the electric circuit to be effectively integrated, and the flow cross-sectional area is increased without increasing the outer diameter of the catheter, thereby improving the performance of the entire ablation system. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the intravascular ablation catheter of the present invention.
[0018] Figure 2 It is a schematic diagram of the first adapter and the second adapter in the intravascular ablation catheter of the present invention.
[0019] Figure 3 It is an exploded view of the first adapter and the second adapter in the intravascular ablation catheter of the utility model.
[0020] Figure 4 for Figure 3 A partial enlarged schematic diagram of area A in the middle.
[0021] Figure 5 It is a cross-sectional view of the first adapter and the second adapter in the intravascular ablation catheter of the utility model.
[0022] Figure 6 for Figure 5 A partial enlarged schematic diagram of area B in the middle.
[0023] Figure 7 It is a schematic diagram of a four-way tube assembly in the intravascular ablation catheter of the utility model.
[0024] Figure 8 It is a schematic diagram of the ablation catheter in the intravascular ablation catheter of the present invention.
[0025] Fig. 9 This is a partially enlarged schematic diagram of the ablation catheter.
[0026] Fig.10 It is a cross-sectional view of the ablation catheter in the intravascular ablation catheter of the utility model.
[0027] Fig.11 It is a schematic diagram of the intravascular ablation system of the present invention.
[0028] Description of reference numerals: ablation catheter 100; outer tube 110; liquid inlet cavity 111; liquid outlet cavity 112; hollow cavity 113; liquid outlet hole 114; partition tube 115; partition plate 116; inner tube 120; cable 130; cable connector 140; guidewire connector 150; balloon assembly 160; first adapter 200; first main tube section 210; first sleeve 211; first channel 2111; second channel 2112; first locking member 212 ; first elastic pressure piece 213; first accommodating chamber 2131; first branch pipe section 220; first through chamber 221; second through chamber 222; second adapter 300; second main pipe section 310; second sleeve 311; second locking piece 312; second elastic pressure piece 313; second branch pipe section 320; four-way pipe assembly 400; middle pipe section 410; first side pipe section 420; second side pipe section 430; main unit 500; liquid delivery assembly 600. DETAILED DESCRIPTION
[0029] 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.
[0030] In view of the problems existing in the prior art, the embodiment of the present utility model provides an intravascular ablation catheter, see Figure 1 and Figure 7 The intravascular ablation catheter comprises: an outer tube 110, an inner tube 120, a cable connector 140, a guidewire connector 150, a balloon assembly 160 and an energy conversion element. The energy conversion element (not shown in the figure) is located in the balloon assembly 160. The energy conversion element can be an ultrasonic transducer or an electrode. The outer tube 110 is divided into a liquid inlet cavity 111, a liquid outlet cavity 112 and a hollow cavity 113. A cable 130 is inserted into the liquid inlet cavity 111 and / or the liquid outlet cavity 112. One end of the cable 130 is connected to the energy conversion element, and the other end extends out of the outer tube 110 and is connected to the cable connector 140. The cable connector 140 is connected to the host 500. The inner tube 120 is arranged in the hollow cavity 113 and is extendedly inserted into the balloon assembly 160. A guidewire (not shown in the figure) is inserted into the inner tube 120. One end of the guidewire is inserted into the balloon assembly 160 and the other end is connected to the guidewire connector 150. Specifically, one end of the outer tube 110 is connected to the balloon assembly 160 and the other end is closed, and the cable connector 140 and the guide wire connector 150 extend from the other end of the outer tube 110 .
[0031] The separation of the waterway and the circuit in the existing design leads to problems such as low space utilization, small waterway cross-sectional area, and high water pressure. In this embodiment, the outer tube 110 is divided into a liquid inlet chamber 111, a liquid outlet chamber 112, and a hollow chamber 113. This separation design not only achieves the separation of the waterway and the circuit, but also makes full use of the internal space of the outer tube 110. The inner tube 120 is arranged in the hollow chamber 113, the guide wire is inserted into the inner tube 120, and the cable 130 is inserted into the liquid inlet chamber 111 and / or the liquid outlet chamber 112. The chamber separation design of the outer tube 110 can not only ensure the layout of the cable 130 and the guide wire, but also increase the flow cross-sectional area without increasing the outer diameter of the catheter, thereby improving the performance of the entire ablation system.
[0032] In a first preferred embodiment, see Figure 1 and Figure 8 The outer tube 110 is provided with a liquid inlet hole and a liquid outlet hole 114 at one end near the cable connector 140. The liquid inlet hole and the liquid outlet hole 114 are staggered. The liquid inlet hole is connected to the liquid inlet cavity 111, and the liquid outlet hole 114 is connected to the liquid outlet cavity 112. The outer tube 110 is provided with a first adapter 200 and a second adapter 300. The first adapter 200 is connected to the liquid inlet hole, and the second adapter 300 is connected to the liquid outlet hole 114.
[0033] In one specific embodiment, see Figure 2The first adapter 200 is a first three-way pipe assembly, which includes a first main pipe section 210 and a first branch pipe section 220 provided on the side of the first main pipe section 210. The first main pipe section 210 is sleeved and installed on the outer pipe 110, and the first branch pipe section 220 is connected to the liquid inlet. The first branch pipe section 220 is sealed and connected to the liquid inlet of the outer pipe 110, for example, by adhesive sealing, hot melt sealing, etc.
[0034] In another specific embodiment, see Figure 6 The first main pipe section 210 includes a first sleeve 211, a pair of first elastic pressing members 213 and a pair of first locking members 212. The first sleeve 211 includes a first channel 2111 located in the middle of the first sleeve 211 and a pair of second channels 2112 located at both ends of the first sleeve 211. The first channel 2111 is connected to the second channel 2112 and is adapted to the outer tube 110. The cross-sectional area of the second channel 2112 is greater than the cross-sectional area of the first channel 2111. A pair of first locking members 212 are sleeved on the outer tube 110 and are respectively threadedly connected to a pair of second channels 2112. A first accommodating cavity 2131 adapted to the first elastic pressure member 213 is formed in the first locking member 212. The first elastic pressure member 213 is sleeved on the outer tube 110 and is located in the corresponding first accommodating cavity 2131. When the outer tube 110 flows with liquid and expands, the first elastic pressure member 213 deforms and expands and presses tightly between the outer tube 110 and the first accommodating cavity 2131 to achieve sealing.
[0035] In this embodiment, the first elastic pressure piece 213 and the first locking piece 212 are used in combination to improve the sealing performance, stability and durability. The first locking piece 212 is sleeved on the outer tube 110 and connected to the second channel 2112 through threads. This connection method is not only simple and reliable, but also easy to disassemble and replace. When the first elastic pressure piece 213 needs to be replaced or maintained, it can be easily completed by simply loosening the first locking piece 212, which improves maintainability.
[0036] Better, see Figure 4 The first branch pipe section 220 includes a first through cavity 221 and a second through cavity 222 that are connected to each other. The first through cavity is connected to the liquid inlet hole, and the cross-sectional area of the second through cavity 222 is greater than the cross-sectional area of the first through cavity 221.
[0037] In another possible embodiment, see Figures 3 to 6The second adapter 300 is a second three-way pipe assembly, which includes a second main pipe section 310 and a second branch pipe section 320 arranged on the side of the second main pipe section 310. The second main pipe section 310 is sleeved and installed on the outer pipe 110, and the second branch pipe section 320 is connected to the liquid outlet 114. The second branch pipe section 320 is sealed and connected to the liquid outlet 114 of the outer pipe 110, for example, by adhesive sealing, hot melt sealing, etc.
[0038] In yet another possible embodiment, see Figure 5 The second main pipe section 310 includes a second sleeve 311, a pair of second elastic pressure pieces 313 and a pair of second locking pieces 312. The second sleeve 311 includes a first channel located in the middle of the second sleeve 311 and a pair of second channels located at both ends of the second sleeve 311. The first channel is connected to the second channel and is adapted to the outer tube 110. The cross-sectional area of the second channel is greater than the cross-sectional area of the first channel. The pair of second locking pieces 312 are sleeved on the outer tube 110 and are respectively threadedly connected in the pair of second channels. A second accommodating cavity adapted to the second elastic pressure piece 313 is formed in the second locking piece 312. The second elastic pressure piece 313 is sleeved on the outer tube 110 and is located in the corresponding second accommodating cavity. When the outer tube 110 flows with liquid and expands, the second elastic pressure piece 313 deforms and expands and presses tightly between the outer tube 110 and the second accommodating cavity to achieve sealing.
[0039] In this embodiment, the second elastic pressure piece 313 and the second locking piece 312 are used together to improve the sealing performance, enhance stability and durability. The second locking piece 312 is sleeved on the outer tube 110 and connected to the second channel through threads. This connection method is not only simple and reliable, but also easy to disassemble and replace. When the second elastic pressure piece 313 needs to be replaced or maintained, it can be easily completed by loosening the second locking piece 312, which improves maintainability.
[0040] Preferably, the second branch pipe section 320 includes a first communicating cavity and a second communicating cavity which are connected to each other, the first communicating cavity is connected to the liquid outlet 114, and the cross-sectional area of the second communicating cavity is larger than the cross-sectional area of the first communicating cavity.
[0041] In the second preferred embodiment, see Figure 1 and Figure 8 The outer tube 110 is provided with a liquid inlet hole and a liquid outlet hole 114 at one end close to the cable connector 140. The liquid inlet hole is connected to the liquid inlet cavity 111, and the liquid outlet hole 114 is connected to the liquid outlet cavity 112. Figure 7 A four-way pipe assembly 400 is sleeved and installed on the outer tube 110 , and the four-way pipe assembly 400 is connected with the liquid inlet cavity 111 and the liquid outlet cavity 112 .
[0042] In a specific embodiment, see Figure 7The four-way pipe assembly 400 includes a middle pipe section 410, a first side pipe section 420 and a second side pipe section 430. The middle pipe section 410 is sleeved and installed on the outer pipe 110. The first side pipe section 420 is connected to the liquid inlet hole, and the second side pipe section 430 is connected to the liquid outlet hole 114.
[0043] In a possible embodiment, the structure of the intermediate pipe section 410 is similar to that of the first main pipe section 210, see Figure 1 The middle pipe section 410 includes a third sleeve, a pair of third elastic pressure pieces and a pair of third locking pieces. The third sleeve includes a first communication cavity located in the middle of the third sleeve and a pair of second communication cavities located at both ends of the third sleeve. The first communication cavity is connected to the second communication cavity and is adapted to the outer tube 110. The cross-sectional area of the second communication cavity is greater than the cross-sectional area of the first communication cavity. The pair of third locking pieces are sleeved on the outer tube 110 and are respectively threadedly connected to the pair of second communication cavities. A third accommodating cavity adapted to the third elastic pressure piece is formed in the third locking piece. The third elastic pressure piece is sleeved on the outer tube 110 and is located in the corresponding third accommodating cavity. When the outer tube 110 flows through the liquid and expands, the third elastic pressure piece deforms and expands and presses tightly between the outer tube 110 and the third accommodating cavity to achieve sealing. Specifically, the first three-way pipe assembly and the second three-way pipe assembly are T-shaped or phase-changing three-way pipe assemblies, and the four-way pipe assembly 400 is a cross or phase-changing four-way pipe assembly 400, or a combined integrated structure.
[0044] In a specific embodiment, see Figures 8 to 10 The outer tube 110 is provided with a partition tube 115 and a partition plate 116. The outer tube 110, the partition tube 115, and the partition plate 116 can be integrally formed or fixedly connected. The partition plate 116 is fixedly connected between the partition tube 115 and the inner tube 120. The partition tube 115 and the partition plate 116 are arranged along the length direction of the outer tube 110. The partition tube 115 is adapted to the inner tube 120, and the inner tube 120 is sealedly arranged in the partition tube 115. The outer wall of the inner tube 120 can be sealedly connected to the partition tube 115 by bonding, welding, or hot melting. The two sides of the partition plate 116 are respectively the liquid inlet cavity 111 and the liquid outlet cavity 112.
[0045] Also, see Fig.11The utility model also provides an intravascular ablation system, comprising: a host 500, a liquid delivery component 600, and an intravascular ablation catheter 100 as in any of the above embodiments, wherein the liquid supply pipe of the liquid delivery component 600 is connected to the liquid inlet cavity 111, and the liquid return pipe of the liquid delivery component 600 is connected to the liquid outlet cavity 112. The liquid delivery component 600 also includes a storage box and a water pump for storing liquid. The liquid delivery component 600 delivers liquid to the liquid inlet cavity 111 at the proximal end of the ablation catheter 100, and the liquid is delivered from the proximal end of the ablation catheter 100 to the distal end of the ablation catheter 100 in the liquid inlet cavity 111, and then flows into the liquid outlet cavity 112 at the distal end of the ablation catheter 100 through the balloon component 160, and the liquid is delivered from the distal end of the ablation catheter 100 back to the proximal end of the ablation catheter 100 in the liquid outlet cavity 112, and then flows back to the liquid delivery component 600, thereby realizing the circulation of the liquid.
[0046] In the first preferred embodiment, the first adapter 200 is connected to the liquid supply pipe, and the second adapter 300 is connected to the liquid return pipe. By providing the first adapter 200 and the second adapter 300, the liquid supply pipe and the liquid return pipe can be conveniently connected to the outer tube 110, thereby improving the stability and reliability of the connection. The liquid in the liquid supply pipe enters the liquid inlet cavity 111 from the liquid inlet hole of the outer tube 110 through the first adapter 200, and the liquid is transported from the proximal end of the ablation catheter 100 to the distal end of the ablation catheter 100 in the liquid inlet cavity 111, and then flows into the liquid outlet cavity 112 at the distal end of the ablation catheter 100 through the balloon assembly 160. The liquid is transported from the distal end of the ablation catheter 100 back to the proximal end of the ablation catheter 100 in the liquid outlet cavity 112, and then flows out of the liquid inlet cavity 111 from the liquid outlet hole 114 of the outer tube 110 through the second adapter 300, and flows into the liquid return pipe, completing the circulation of the cooling liquid.
[0047] In the second preferred embodiment, the first side pipe section 420 of the cross-way pipe assembly 400 is connected to the liquid supply pipe of the liquid delivery assembly 600 , and the second side pipe section 430 of the cross-way pipe assembly 400 is connected to the liquid return pipe of the liquid delivery assembly 600 .
[0048] 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 ablation catheter, characterized in that: include: Outer tube, inner tube, cable connector, guidewire connector, balloon assembly and energy conversion component; The outer tube is divided into a liquid inlet cavity, a liquid outlet cavity and a hollow cavity, and a cable is passed through the liquid inlet cavity and / or the liquid outlet cavity, one end of the cable is connected to the energy conversion element and the other end is connected to the cable connector; The inner tube is arranged in the hollow cavity, a guide wire is passed through the inner tube, one end of the guide wire is passed through the balloon assembly and the other end is connected to the guide wire connector.
2. The intravascular ablation catheter according to claim 1, characterized in that: A liquid inlet hole and a liquid outlet hole are provided on the outer tube near one end of the cable connector, the liquid inlet hole is communicated with the liquid inlet cavity, and the liquid outlet hole is communicated with the liquid outlet cavity; The outer tube is provided with a first adapter and a second adapter, the first adapter is communicated with the liquid inlet, and the second adapter is communicated with the liquid outlet.
3. The intravascular ablation catheter according to claim 2, characterized in that: The first adapter is a first three-way pipe assembly, which includes a first main pipe section and a first branch pipe section arranged on the side of the first main pipe section. The first main pipe section is sleeved and installed on the outer pipe, and the first branch pipe section is connected to the liquid inlet.
4. The intravascular ablation catheter according to claim 3, characterized in that: The first main pipe section includes a first sleeve connector, a pair of first elastic pressing members and a pair of first locking members; The first sleeve member includes a first channel located in the middle of the first sleeve member and a pair of second channels located at two ends of the first sleeve member, the first channel is connected to the second channel and is adapted to the outer tube, and the cross-sectional area of the second channel is larger than the cross-sectional area of the first channel; A pair of the first locking pieces are sleeved on the outer tube and are respectively threadedly connected to a pair of the second channels; a first accommodating cavity matched with the first elastic pressure piece is formed in the first locking piece; the first elastic pressure piece is sleeved on the outer tube and is located in the corresponding first accommodating cavity; when the liquid flowing through the outer tube expands, the first elastic pressure piece deforms and expands and presses tightly between the outer tube and the first accommodating cavity to achieve sealing.
5. The intravascular ablation catheter according to claim 2, characterized in that: The second adapter is a second three-way pipe assembly, which includes a second main pipe section and a second branch pipe section arranged on the side of the second main pipe section. The second main pipe section is sleeved and installed on the outer pipe, and the second branch pipe section is connected to the liquid outlet.
6. The intravascular ablation catheter according to claim 5, characterized in that: The second main pipe section includes a second sleeve connector, a pair of second elastic pressing members and a pair of second locking members; The second sleeve member includes a first hole located in the middle of the second sleeve member and a pair of second holes located at two ends of the second sleeve member, the first hole is connected to the second hole and is adapted to the outer tube, and the cross-sectional area of the second hole is greater than the cross-sectional area of the first hole; A pair of second locking pieces are sleeved on the outer tube and are respectively threadedly connected to a pair of second channels. A second accommodating cavity adapted to the second elastic pressure piece is formed in the second locking piece. The second elastic pressure piece is sleeved on the outer tube and is located in the corresponding second accommodating cavity. When the liquid flowing through the outer tube expands, the second elastic pressure piece deforms and expands and presses tightly between the outer tube and the second accommodating cavity to achieve sealing.
7. The intravascular ablation catheter according to claim 1, characterized in that: A liquid inlet hole and a liquid outlet hole are provided on the outer tube near one end of the cable connector, the liquid inlet hole is communicated with the liquid inlet cavity, and the liquid outlet hole is communicated with the liquid outlet cavity; A four-way pipe assembly is sleeved and installed on the outer tube, and the four-way pipe assembly is communicated with the liquid inlet cavity and the liquid outlet cavity.
8. The intravascular ablation catheter according to claim 7, characterized in that: The cross-tube assembly includes a middle pipe section, a first side pipe section and a second side pipe section; The middle pipe section is sleeved and installed on the outer pipe, the first side pipe section is communicated with the liquid inlet, and the second side pipe section is communicated with the liquid outlet.
9. The intravascular ablation catheter according to any one of claims 1 to 8, characterized in that: A partition tube and a partition plate are provided inside the outer tube, the partition plate is fixedly connected between the partition tube and the inner tube, and the partition tube and the partition plate are arranged along the length direction of the outer tube; The separation tube is matched with the inner tube, and the inner tube is sealed inside the separation tube. The two sides of the separation plate are the liquid inlet cavity and the liquid outlet cavity respectively.
10. An intravascular ablation system, characterized in that: include: A host, a liquid delivery component, and an intravascular ablation catheter as described in any one of claims 1 to 9; The liquid supply pipe of the liquid delivery component is communicated with the liquid inlet cavity, and the liquid return pipe of the liquid delivery component is communicated with the liquid outlet cavity.