Ultrasonic ablation catheter

Abstract

The utility model provides an ultrasonic ablation catheter. The catheter body is sequentially provided with a catheter seat, a first catheter section, a second catheter section and a third catheter section in the axial direction, a first liquid inlet and a first liquid outlet are formed in the catheter seat, a first filling opening is formed in the first catheter section, a second liquid inlet and a second liquid outlet are formed in the second catheter section, and a second filling opening is formed in the third catheter section. A liquid inlet channel, a liquid outlet channel and a perfusion channel are arranged on the pipe main body, the liquid inlet channel is formed between the first liquid inlet and the second liquid inlet, the liquid outlet channel is formed between the second liquid outlet and the first liquid outlet, and the perfusion channel is formed between the first perfusion port and the second perfusion port. The ultrasonic ablation catheter provided by the utility model can form circulating water flow in the cavity, and the circulating water flow can realize the purpose of cooling human tissues; the perfusion channel is further arranged on the tube main body, so that the condition of injury caused by blood flow retardation in the blood vessel is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and specifically, to an ultrasonic ablation catheter. Background Art

[0002] Interventional surgery is increasingly accepted by doctors and patients due to its advantages such as small trauma, good curative effect, and few side effects. For example, ultrasonic ablation catheter interventional surgery. This kind of surgery is an effective way to treat refractory hypertension. During the treatment process, the ultrasonic ablation catheter is delivered to a specific position in the blood vessel, and then ultrasonic ablation resection is performed to achieve the purpose of treating refractory hypertension.

[0003] However, when the existing ultrasonic ablation catheter is in the human blood vessel, the balloon inflated due to pressurization will block the blood flow in the blood vessel, which may cause the blood vessel to be damaged due to ischemia for too long or the treatment duration of the catheter to be too short to achieve the ideal treatment effect. Summary of the Utility Model

[0004] In order to at least partially solve the problems existing in the prior art, the utility model provides an ultrasonic ablation catheter. The ultrasonic ablation catheter includes a balloon and a tube body penetrating through the balloon. A chamber is formed inside the balloon, and an ultrasonic transducer is arranged in the chamber. The tube body successively has a catheter seat, a first tube section, a second tube section, and a third tube section in the axial direction. The second tube section is located in the chamber, and the ultrasonic transducer is arranged on the second tube section. A first liquid inlet and a first liquid outlet are arranged on the catheter seat. A first perfusion port is arranged on the first tube section. A second liquid inlet and a second liquid outlet are arranged on the second tube section. A second perfusion port is arranged on the third tube section. Wherein, a liquid inlet channel, a liquid outlet channel, and a perfusion channel are arranged on the tube body. The liquid inlet channel is formed between the first liquid inlet and the second liquid inlet. The liquid outlet channel is formed between the second liquid outlet and the first liquid outlet. The perfusion channel is formed between the first perfusion port and the second perfusion port.

[0005] The ultrasonic ablation catheter provided by the present utility model can inject any suitable liquid into the liquid inlet channel through the first liquid inlet, and the liquid enters the chamber through the second liquid inlet, so that the balloon expands to participate in the treatment; after the balloon expands, the liquid continues to enter the chamber, causing part of the liquid to enter the liquid outlet channel through the second liquid outlet, and then being discharged to the outside through the first liquid outlet. In this way, a circulating water flow can be formed in the chamber, and the circulating water flow can achieve the purpose of cooling the human tissue, avoiding damage to the inner walls of some blood vessels in the human body due to excessive temperature during the ablation treatment; a perfusion channel is also provided on the tube body. After the expanded balloon blocks the blood vessel, the blood flow in the blood vessel can still flow through the perfusion channel. Such an ultrasonic ablation catheter avoids damage caused by blood flow blockage in the blood vessel during use, and because the blood flow in the blood vessel is unobstructed, the ultrasonic ablation catheter can participate in the treatment for a longer time. The ultrasonic ablation catheter provided with a liquid inlet channel, a liquid outlet channel and a perfusion channel has stronger functional compatibility and expandability, can meet different treatment requirements, and has a better treatment effect.

[0006] Exemplarily, a second guide wire port is provided on the third tube section, and a guide wire channel is provided on the tube body. The guide wire channel extends from the second guide wire port towards the proximal end of the tube body within the tube body, and the guide wire channel is used to sleeved with a guide wire so that the ultrasonic ablation catheter moves along a preset extending path or a preset retracting path under the guidance of the guide wire.

[0007] Exemplarily, a first guide wire port is provided on the catheter seat, and the guide wire channel is formed between the second guide wire port and the first guide wire port.

[0008] Exemplarily, a first guide wire port is provided on the first tube section, and the guide wire channel is formed between the second guide wire port and the first guide wire port.

[0009] Exemplarily, a combined through hole is provided on the first tube section, and the combined through hole forms a first guide wire port and a first perfusion port.

[0010] Exemplarily, a composite channel is formed in the tube body extending from the combined through hole towards the distal end of the tube body. The composite channel is formed by a multi-lumen tube. One of the multiple channels of the multi-lumen tube forms a guide wire channel, and at least one of the other channels forms a perfusion channel.

[0011] Exemplarily, a receiving cavity is formed in the tube body, and a composite channel and multiple single-lumen tubes are provided in the receiving cavity. The multiple single-lumen tubes are respectively enclosed by their respective tube walls to form one of the liquid inlet channel, the liquid outlet channel, the perfusion channel and the guide wire channel.

[0012] Exemplarily, the tube body includes multiple lumen tubes, and the multiple lumen tubes respectively form one of the liquid inlet channel, the liquid outlet channel, the perfusion channel and the guide wire channel, and at least one of the multiple lumen tubes is provided with a composite channel.

[0013] Exemplarily, the tube body includes a plurality of lumen tubes, and each of the plurality of lumen tubes forms one of a liquid inlet channel, a liquid outlet channel, an irrigation channel, and a guide wire channel.

[0014] Exemplarily, at least one single lumen tube is disposed in at least one of the plurality of lumen tubes, and the tube wall of the single lumen tube encloses to form a liquid inlet channel, a liquid outlet channel, an irrigation channel, or a guide wire channel.

[0015] Exemplarily, a receiving cavity is formed in the tube body, and a plurality of single lumen tubes are disposed in the receiving cavity. Each of the plurality of single lumen tubes is enclosed by its respective tube wall to form one of a liquid inlet channel, a liquid outlet channel, an irrigation channel, and a guide wire channel.

[0016] Exemplarily, the tube body includes a special-shaped tube. The outer side of the special-shaped tube has a first groove and one or more channels inside. Each channel forms a liquid inlet channel, a liquid outlet channel, an irrigation channel, or a guide wire channel. Among them, a single lumen tube is disposed in the first groove, and the tube wall of the single lumen tube encloses to form a liquid inlet channel, a liquid outlet channel, an irrigation channel, or a guide wire channel; alternatively, a multi-lumen tube is disposed in the first groove, and the multi-lumen tube has a plurality of channels, and each channel forms a liquid inlet channel, a liquid outlet channel, an irrigation channel, or a guide wire channel.

[0017] Exemplarily, the second liquid inlet is disposed at the proximal end of the second tube segment, the second liquid outlet is disposed at the distal end of the second tube segment, and the ultrasonic transducer is disposed between the second liquid inlet and the second liquid outlet.

[0018] Exemplarily, the second irrigation port is disposed on the distal end face of the third tube segment.

[0019] Exemplarily, the second irrigation port is disposed on the side surface of the third tube segment.

[0020] Exemplarily, the side surface of the third tube segment is recessed inward to form a second groove communicating with the distal end face of the third tube segment, and the second irrigation port is disposed in the second groove.

[0021] Exemplarily, a wire port is disposed on the catheter hub. The wire passes through the wire port into the tube body, and the wire passes out of the tube body at the first irrigation port and enters the chamber to be connected to the ultrasonic transducer.

[0022] A series of simplified concepts are introduced in the utility model content, which will be further described in detail in the specific implementation section. The utility model content section does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the protection scope of the claimed technical solution.

[0023] The advantages and features of the present utility model will be described in detail below with reference to the accompanying drawings. Description of the Drawings

[0024] The following drawings of the present utility model are hereby incorporated as part of the present utility model for understanding the present utility model. The embodiments and descriptions of the present utility model are shown in the drawings to explain the principles of the present utility model. In the drawings,

[0025] Figure 1 is a schematic diagram of an ultrasonic ablation catheter according to an exemplary embodiment of the present utility model;

[0026] Figure 2 is Figure 1 a perspective view of the ultrasonic ablation catheter shown (the dotted holes in the figure indicate the back side);

[0027] Figure 3 is Figure 2 a partially enlarged view of the ultrasonic ablation catheter shown (the dotted holes in the figure indicate the back side);

[0028] Figure 4A is Figure 3 a front view of a part of the ultrasonic ablation catheter shown;

[0029] Figure 4B is Figure 3 a rear view of a part of the ultrasonic ablation catheter shown;

[0030] Figure 5 is a schematic diagram of an ultrasonic ablation catheter according to an exemplary embodiment of the present utility model;

[0031] Figure 6 is Figure 5 a perspective view of the ultrasonic ablation catheter shown (the dotted holes in the figure indicate the back side);

[0032] Figure 7 is Figure 6 a partially enlarged view of the ultrasonic ablation catheter shown (the dotted holes in the figure indicate the back side);

[0033] Figure 8A is Figure 7 a front view of a part of the ultrasonic ablation catheter shown;

[0034] Figure 8B is Figure 7 a rear view of a part of the ultrasonic ablation catheter shown;

[0035] Figure 9A is a cross-sectional view of a tube body according to an exemplary embodiment of the present utility model;

[0036] Figure 9B is a cross-sectional view of a tube body according to an exemplary embodiment of the present utility model;

[0037] Figure 9CCross-sectional view of a pipe body according to an exemplary embodiment of the present utility model;

[0038] Figure 10A Cross-sectional view of a pipe body according to an exemplary embodiment of the present utility model;

[0039] Figure 10B Cross-sectional view of a pipe body according to an exemplary embodiment of the present utility model;

[0040] Figure 10C Cross-sectional view of a pipe body according to an exemplary embodiment of the present utility model;

[0041] Figure 11A Cross-sectional view of a pipe body according to an exemplary embodiment of the present utility model;

[0042] Figure 11B It is Figure 11A Partial enlarged view of the pipe body shown;

[0043] Figure 12A Cross-sectional view of a pipe body according to an exemplary embodiment of the present utility model;

[0044] Figure 12B It is Figure 12A Partial enlarged view of the pipe body shown;

[0045] Figure 13A Cross-sectional view of a pipe body according to an exemplary embodiment of the present utility model;

[0046] Figure 13B It is Figure 13A Partial enlarged view of the pipe body shown;

[0047] Figure 14A Cross-sectional view of a pipe body according to an exemplary embodiment of the present utility model;

[0048] Figure 14B It is Figure 14A Partial enlarged view of the pipe body shown;

[0049] Figure 15A Cross-sectional view of a pipe body according to an exemplary embodiment of the present utility model;

[0050] Figure 15B It is Figure 15A Partial enlarged view of the pipe body shown;

[0051] Figure 16A Cross-sectional view of a pipe body according to an exemplary embodiment of the present utility model;

[0052] Figure 16B It is Figure 16A Partial enlarged view of the pipe body shown;

[0053] Figure 17A A cross-sectional view of a tube body according to an exemplary embodiment of the present utility model;

[0054] Figure 17B is Figure 17A a partially enlarged view of the tube body shown;

[0055] Figure 18A a partially enlarged view of an ultrasonic ablation catheter according to an exemplary embodiment of the present utility model;

[0056] Figure 18B a partially enlarged view of an ultrasonic ablation catheter according to an exemplary embodiment of the present utility model; and

[0057] Figure 18C a partially enlarged view of an ultrasonic ablation catheter according to an exemplary embodiment of the present utility model.

[0058] Wherein, the above-mentioned drawings include the following reference numerals:

[0059] 100, balloon; 110, chamber; 200, tube body; 201, liquid inlet channel; 202, liquid outlet channel; 203, perfusion channel; 204, guide wire channel; 205, composite channel; 206, main body part; 207, accommodation cavity; 208, first groove; 210, catheter seat; 211, first liquid inlet; 212, first liquid outlet; 213, first guide wire port A; 214, wire port; 220, first tube section; 221, first perfusion port; 222, first guide wire port B; 223, combined through hole; 230, second tube section; 231, second liquid inlet; 232, second liquid outlet; 240, third tube section; 241, second perfusion port; 242, second guide wire port; 243, second groove; 250, proximal end; 260, distal end; 300, ultrasonic transducer; 400, wire; 500, main unit. Detailed implementation manners

[0060] In the following description, a large number of details are provided to enable a thorough understanding of the present utility model. However, those skilled in the art can understand that the following description only exemplarily shows the preferred embodiments of the present utility model, and the present utility model can be implemented without one or more of such details. In addition, in order to avoid confusion with the present utility model, some well-known technical features in the art are not described in detail.

[0061] The present utility model provides an ultrasonic ablation catheter. Refer to Figure 1 and Figure 2, an ultrasound ablation catheter may include a balloon 100 and a tube body 200 passing through the balloon 100. A chamber 110 may be formed inside the balloon 100, and an ultrasound transducer 300 may be disposed in the chamber 110. The ultrasound transducer 300 may be connected to a main unit 500 through a wire 400. The ultrasonic waves emitted by the ultrasound transducer 300 may drive the vibration and heating of human tissues to inactivate the lesion area, thereby achieving the purpose of ablation treatment. Other positions in the chamber 110 may also be installed with mapping components to achieve the integration of diagnosis and treatment or provide more precise treatment for patients.

[0062] The tube body 200 may sequentially have a catheter seat 210, a first tube section 220, a second tube section 230, and a third tube section 240 in the axial direction. When the ultrasound ablation catheter is in use, the part of the tube body 200 that enters the human body may be a part of the third tube section 240, the second tube section 230, and the first tube section 220. The second tube section 230 may be located inside the chamber 110, and the ultrasound transducer 300 may be disposed on the second tube section 230. A first liquid inlet 211 and a first liquid outlet 212 may be provided on the catheter seat 210. A first perfusion port 221 may be provided on the first tube section 220. The first perfusion port 221 is located outside the balloon 100. Preferably, the first perfusion port 221 may be located on the first tube section 220 at a position relatively close to the balloon 100. A second liquid inlet 231 and a second liquid outlet 232 may be provided on the second tube section 230. Since the second tube section 230 is located inside the chamber 110, the second liquid inlet 231 and the second liquid outlet 232 are also located inside the chamber 110. A second perfusion port 241 may be provided on the third tube section 240. The second perfusion port 241 is located outside the balloon 100. Among them, referring to Figure 3 , Figure 4A and Figure 4B , a liquid inlet channel 201, a liquid outlet channel 202, and a perfusion channel 203 may be provided on the tube body 200.

[0063] Among them, the liquid inlet channel 201 may be formed between the first liquid inlet 211 and the second liquid inlet 231. The first liquid inlet 211 may be connected to an external liquid supply device. The external liquid supply device may deliver any suitable liquid to the liquid inlet channel 201 through the first liquid inlet 211. For example, the external liquid supply device may deliver physiological saline with a certain concentration to the first liquid inlet 211. The liquid in the liquid inlet channel 201 may enter the chamber 110 through the second liquid inlet 231. Thus, a large amount of liquid entering the chamber 110 may cause the balloon 100 to expand. As Figure 2As shown, when observed from a diagrammatic perspective, the first liquid inlet 211 and the second liquid inlet 231 can both be located on the back surface of the ultrasonic ablation catheter. Therefore, the first liquid inlet 211 and the second liquid inlet 231 are represented by dashed lines in the figure. Exemplarily, the connection line between the first liquid inlet 211 and the second liquid inlet 231 can be parallel to the axis of the tube body 200.

[0064] The liquid outlet channel 202 is formed between the second liquid outlet 232 and the first liquid outlet 212. The liquid that enters the liquid inlet channel 201 through the first liquid inlet 211 and then enters the chamber 110 through the second liquid inlet 231 can enter the liquid outlet channel 202 through the second liquid outlet 232 and then be discharged to the outside through the first liquid outlet 212. As mentioned above, when the ultrasonic ablation catheter is in use, it can drive the human tissue to vibrate and generate heat. The liquid that enters the chamber 110 through the liquid inlet channel 201 is then discharged to the outside through the liquid outlet channel 202. In this way, a circulating water flow can be formed, and such a circulating water flow can achieve the purpose of cooling the human tissue, avoiding damage due to excessive temperature on the inner walls of some blood vessels in the human body.

[0065] The perfusion channel 203 is formed between the first perfusion port 221 and the second perfusion port 241. When the ultrasonic ablation catheter is in use, the first perfusion port 221 and the second perfusion port 241 can both be located inside the human body. And the first perfusion port 221 is located on the first tube segment 220, the second perfusion port 241 is located on the third tube segment 240, while the balloon 100 is located on the second tube segment 230. That is to say, the first perfusion port 221 and the second perfusion port 241 are respectively located on both sides of the balloon 100 along the axial direction of the tube body 200. The blood in the human body can enter the perfusion channel 203 through the first perfusion port 221 and flow out from the second perfusion port 241. It should be noted that the blood flow direction in the perfusion channel 203 when the ultrasonic ablation catheter is in use is not limited. That is to say, the blood can enter the perfusion channel 203 from the first perfusion port 221 and flow out from the second perfusion port 241; it can also enter the perfusion channel 203 from the second perfusion port 241 and flow out from the first perfusion port 221. The blood flow direction in the perfusion channel 203 is related to the actual situation when the ultrasonic ablation catheter is in use, not only related to whether the ultrasonic ablation catheter is in the pushing state or the withdrawing state, but also related to the original blood flow direction in the blood vessel. Thus, even if the balloon 100 expands and blocks the blood vessel, the blood in the blood vessel can still continue to flow through the perfusion channel 203.

[0066] A wire port 214 can also be provided on the catheter seat 210. The wire 400 connected to the host 500 can enter the inside of the tube body 200 through the wire port 214, then pass through the first perfusion port 221 and run to the outside of the tube body 200, and enter the chamber 110 to be connected to the ultrasonic transducer 300.

[0067] The liquid inlet channel 201, the liquid outlet channel 202 and the perfusion channel 203 can be in the form of separate pipes, that is, they can be in the form of single-lumen tubes arranged in the pipe body 200; or the pipe body 200 can include multiple lumens, and the multiple lumens in the pipe body 200 can form one of the liquid inlet channel 201, the liquid outlet channel 202 and the perfusion channel 203. The pipe body 200 includes multiple lumens, which can be a pipe body 206 of the pipe body 200. It is worth noting that the pipe body 200 includes multiple lumens, which is different from the pipe body 200 having multiple single-lumen tubes. The pipe body 200 including multiple lumens has multiple lumens on its main body 206, that is, it has multiple channels, and when the pipe body 200 has multiple single-lumen tubes, each single-lumen tube independently forms a channel.

[0068] The ultrasonic ablation catheter provided by the utility model can inject any suitable liquid into the liquid inlet channel 201 through the first liquid inlet 211, and the liquid enters the chamber 110 through the second liquid inlet 231, so that the balloon 100 expands and swells to participate in the treatment; after the balloon 100 expands and swells, the liquid continues to enter the chamber 110, which will cause part of the liquid to enter the liquid outlet channel 202 through the second liquid outlet 232, and then be discharged to the outside through the first liquid outlet 212, so that a circulating water flow can be formed in the chamber 110, and the circulating water flow can achieve the purpose of cooling human tissue, and avoid the inner wall of some blood vessels in the human body from being damaged due to excessive temperature during the ablation treatment; a perfusion channel 203 is also provided on the tube body 200, and after the expanded balloon 100 blocks the blood vessel, the blood flow in the blood vessel can still continue to flow through the perfusion channel 203, such an ultrasonic ablation catheter can avoid damage due to blood flow blockage in the blood vessel when in use, and because the blood flow in the blood vessel is unobstructed, the ultrasonic ablation catheter can also participate in the treatment for a longer time. The ultrasonic ablation catheter provided with a liquid inlet channel 201, a liquid outlet channel 202 and an infusion channel 203 has stronger functional compatibility and expandability, can meet different treatment needs, and has a better treatment effect.

[0069] For example, the third tube segment 240 may be provided with a second guide wire port 242, and the second guide wire port 242 may be located outside the balloon 100. Figure 3 , Figure 4A and Figure 4B, a liquid inlet channel 201, a liquid outlet channel 202, an infusion channel 203, and a guide wire channel 204 may be provided on the catheter body 200. The liquid inlet channel 201, the liquid outlet channel 202, the infusion channel 203, and the guide wire channel 204 may respectively be in the form of separate pipes, that is, they may respectively be provided in the catheter body 200 in the form of single lumen tubes; or the catheter body 200 may include multiple lumen tubes, and the multiple lumen tubes in the catheter body 200 may respectively form one of the liquid inlet channel 201, the liquid outlet channel 202, the infusion channel 203, and the guide wire channel 204.

[0070] Among them, the guide wire channel 204 extends in the catheter body 200 from the second guide wire port 242 towards the proximal end 250 of the catheter body 200. The guide wire channel 204 is used to sleeved on the guide wire so that the ultrasonic ablation catheter can move along a preset extending path or a preset retracting path under the guidance of the guide wire. The preset extending path refers to the path along which the ultrasonic ablation catheter moves when extending along the guide wire, and the preset retracting path refers to the path along which the ultrasonic ablation catheter moves when retrieving the ultrasonic ablation catheter along the guide wire. It can be understood that a first guide wire port may be provided on the ultrasonic ablation catheter, and the guide wire channel 204 may be formed between the first guide wire port and the second guide wire port 242, so that the guide wire can pass through the guide wire channel 204, and thus the guide wire can pass through at least a part of the ultrasonic ablation catheter, so that the ultrasonic ablation catheter can move under the guidance of the guide wire. Setting the first guide wire port at different positions on the ultrasonic ablation catheter will result in different lengths of the guide wire channel 204. The specific position of the first guide wire port provided on the ultrasonic ablation catheter will be described in detail below in combination with specific embodiments. The guide wire channel 204 is provided on the catheter body 200, and the guide wire can pass through the guide wire channel 204, so that the ultrasonic ablation catheter can reach the lesion position along the guide wire, which is more convenient for operation.

[0071] In an embodiment of the present invention, refer to Figure 1 , Figure 2 , Figure 3 , Figure 4A and Figure 4B , a first guide wire port may also be provided on the catheter hub 210. For the convenience of distinguishing from other embodiments, the first guide wire port in this embodiment is referred to as the first guide wire port A213. Here, the first guide wire port A213 is only for distinction and does not have any limitation. The guide wire channel 204 may be formed between the second guide wire port 242 and the first guide wire port A213. The first guide wire port A213 is provided on the catheter hub 210, which is equivalent to the guide wire channel 204 penetrating the catheter body 200. Such an ultrasonic ablation catheter can be considered as an overall exchange type, that is, when the ultrasonic ablation catheter is in use, it advances and retreats along the guide wire as a whole for taking and using, so that it can have better stability during the treatment process of the ultrasonic ablation catheter.

[0072] In an embodiment of the present invention, refer toFigure 5 , Figure 6 , Figure 7 , Figure 8A and Figure 8B , a first guidewire port may be provided on the first tube section 220. For the convenience of distinguishing from other embodiments, the first guidewire port in this embodiment is referred to as the first guidewire port B222, and the first guidewire port B222 here is only used as a distinction without any limitation. The guidewire channel 204 may be formed between the second guidewire port 242 and the first guidewire port B222. Such a guidewire channel 204 only passes through part of the tube body 200, and such an ultrasonic ablation catheter can be considered as a rapid exchange type. At least a part of the guidewire located outside the human body will be outside the ultrasonic ablation catheter. During the process of the ultrasonic ablation catheter participating in the treatment, the part of the tube body 200 located outside the human body is independent of the guidewire, and the operator can also operate the guidewire, for example, when the guidewire position deviates, the guidewire position can be fine-tuned. For such a rapid exchange balloon catheter, the guidewire does not penetrate the tube body 200, and the pushability of the ultrasonic ablation catheter along the guidewire may be poor, so a hypotube may be provided on the tube body 200 to enhance the overall pushability. For example, a hypotube may be provided on the tube body 200 between the catheter seat 210 and the first tube section 220. Such an ultrasonic ablation catheter has a better effect when participating in treatment.

[0073] For example, see Figure 9A , Figure 9B and Figure 9C The tube body 200 may include a plurality of lumens, and the plurality of lumens may respectively form one of the inlet channel 201, the outlet channel 202, the perfusion channel 203, and the guidewire channel 204. The tube body 200 may include a main body portion 206, and the main body portion 206 may include a plurality of lumens. The plurality of lumens in the tube body 200 may be pre-designed and integrally processed during the production and processing of the main body portion 206. Since the tube body 200 including the plurality of lumens may be integrally processed, such a tube body 200 is more reliable, and no other connection form is required between the plurality of lumens, which is equivalent to reducing the wall thickness between the lumens inside the tube body 200. Such a tube body 200 may also have a smaller size, and the ultrasonic ablation catheter may be more flexible. When such an ultrasonic ablation catheter is used for interventional treatment, the ultrasonic ablation catheter has better passability and better treatment effect.

[0074] For example, see Figure 10A , Figure 10B and Figure 10CAt least one lumen may be provided in at least one lumen of the multiple lumens, and the wall of the single lumen may enclose a liquid inlet channel 201, a liquid outlet channel 202, a perfusion channel 203 or a guide wire channel 204. Since the single lumen tube can be produced and processed independently of the multi-lumen tube, such a tube body 200 has lower requirements on the tube material, and the production and processing are simpler. Figure 10A The main body 206 of the tube body 200 includes three lumens, and the three lumens of the main body 206 respectively form a liquid inlet channel 201, a liquid outlet channel 202 and an infusion channel 203, wherein a single lumen is provided in the liquid outlet channel 202, and the tube wall of the single lumen is enclosed to form a guide wire channel 204. In this way, a landmark design can be added during the production and processing of the single lumen tube to improve the recognition of the single lumen tube. When such an ultrasonic ablation catheter is used, the guide wire channel 204 can be easily identified, and a clearer guide wire channel 204 can provide better guidance for the operator. Similarly, see for details Figure 10B The wall of the single-lumen tube encloses a liquid inlet channel 201, which can be easily identified to avoid misoperation to connect other channels to an external liquid supply device. Figure 10C The main body 206 of the tube body 200 is a double-lumen tube, and the two lumens of the main body 206 respectively form a perfusion channel 203 and a liquid outlet channel 202, wherein two single-lumen tubes are arranged in the liquid outlet channel 202, and the two single-lumen tubes respectively form a liquid inlet channel 201 and a guide wire channel 204. In this way, the liquid inlet channel 201 and the guide wire channel 204 are easier to identify, and such an ultrasonic ablation catheter is easy to operate, and the operator has a better experience in use.

[0075] For example, see Figure 11A , Figure 11B , Figure 12A and Figure 12B, a combined through-hole 223 may be provided on the first pipe section 220, and the combined through-hole 223 may form a first guide wire port and a first perfusion port 221. The first guide wire port in this embodiment is still referred to as the first guide wire port B222. The first guide wire port B222 here is only for distinction and has no any limitation. When the ultrasonic ablation catheter is in use, the first perfusion port 221 is located inside the human body, that is to say, the combined through-hole 223 is located inside the human body. Such an ultrasonic ablation catheter is also of the rapid exchange type. The difference from the rapid exchange type ultrasonic ablation catheter in the foregoing content is that the combined through-hole 223 can form the first guide wire port B222 and the first perfusion port 221. The first guide wire port B222 may be located around the first perfusion port 221. Or the combined through-hole 223 can be regarded as a through-hole that combines the first guide wire port B222 and the first perfusion port 221. The combined through-hole 223 can be connected to both the guide wire channel 204 and the perfusion channel 203. Such an ultrasonic ablation catheter has stronger integrity, fewer openings on the side wall of the tube body 200, higher overall strength, and is also simpler and more convenient for production and processing.

[0076] Exemplarily, refer to Figure 11A , Figure 11B , Figure 12A and Figure 12B , a composite channel 205 may be formed in the tube body 200 and extend from the combined through-hole 223 towards the distal end 260 of the tube body 200. The composite channel 205 may be formed by a multi-lumen tube. The multi-lumen tube may be integrally produced and processed and may have multiple channels. One of the multiple channels of the multi-lumen tube may form a guide wire channel 204, and at least one of the other channels may form a perfusion channel 203. Since the guide wire channel 204 only plays a guiding role in the extension or retraction of the ultrasonic ablation catheter, when the ultrasonic ablation catheter is in use, usually one guide wire is sufficient to complete the guidance of the ultrasonic ablation catheter, while the perfusion channel 203 will always participate in the dredging of the blood flow in the blood vessel during the treatment process of the ultrasonic ablation catheter. Therefore, the composite channel 205 may be provided with only one guide wire channel 204, while the perfusion channel 203 may be provided with multiple ones. Such a composite channel 205 may be integrally formed, and the overall stability of the ultrasonic ablation catheter is better.

[0077] Exemplarily, refer to Figure 11A and Figure 11B , a receiving cavity 207 may be formed in the tube body 200. A composite channel 205 and multiple single-lumen tubes may be provided in the receiving cavity 207. The multiple single-lumen tubes may respectively be formed by their respective tube walls to enclose one of the liquid inlet channel 201, the liquid outlet channel 202, the perfusion channel 203, and the guide wire channel 204. Combining the multiple single-lumen tubes with the composite channel 205 can distinguish different channels for the convenience of the operator's use.

[0078] Exemplarily, refer to Figure 12A and Figure 12B , the tube body 200 may include a plurality of lumen tubes. The plurality of lumen tubes may respectively form one of the liquid inlet channel 201, the liquid outlet channel 202, the perfusion channel 203, and the guide wire channel 204, and a composite channel 205 is disposed in at least one of the plurality of lumen tubes. Such a tube body 200 is similar to that a multi-lumen tube is further disposed in one lumen tube of the plurality of lumen tubes. The composite channel 205 may integrate a plurality of channels, and the composite channel 205 is disposed in one lumen tube, and this lumen tube itself may also form a specific channel. For example, as Figure 12A and Figure 12B shown, the composite channel 205 is formed by a multi-lumen tube, wherein one lumen forms the perfusion channel 203 and one lumen forms the guide wire channel 204. Such a composite channel 205 is disposed in the tube body 200 having a plurality of lumen tubes. One lumen tube of the tube body 200 forms the liquid inlet channel 201, one lumen tube forms the liquid outlet channel 202, and the lumen tube provided with the composite channel 205 in the tube body 200 may also be designed to form the perfusion channel 203 or any other channel as needed. The structure of such a tube body 200 can be more compact, so that such an ultrasonic ablation catheter can achieve a smaller size and is more suitable for interventional surgery.

[0079] In an embodiment of the present invention, the second liquid inlet 231 may be disposed at the proximal end 250 of the second tube segment 230, and the second liquid outlet 232 may be disposed at the distal end 260 of the second tube segment 230. This can make the distance between the second liquid inlet 231 and the second liquid outlet 232 as far as possible, so that the water circulation in the chamber 110 is more sufficient, and the cooling effect on human tissues is better. The ultrasonic transducer 300 may be disposed between the second liquid inlet 231 and the second liquid outlet 232. The human tissue is mainly heated by the ultrasonic waves emitted by the ultrasonic transducer 300. The ultrasonic transducer 300 is disposed between the second liquid inlet 231 and the second liquid outlet 232, and the circulating water can be used to cool the area with too high local temperature more specifically.

[0080] In an embodiment of the present invention, refer to Figure 13A and Figure 13B, a receiving cavity 207 may be formed in the tube body 200, and a plurality of single-lumen tubes may be arranged in the receiving cavity 207, and the plurality of single-lumen tubes may be respectively enclosed by their respective tube walls to form one of the liquid inlet channel 201, the liquid outlet channel 202, the perfusion channel 203, and the guidewire channel 204. Since the plurality of single-lumen tubes may be produced and processed separately, in such an ultrasonic ablation catheter, the tube body 200 has lower requirements on the tube material, and the production and processing are also very simple. For single-lumen tubes forming different channels, different iconic designs may be added during production and processing, so that the multiple channels can be distinguished, which is more convenient for operation.

[0081] In one embodiment of the present invention, see Figure 14A , Figure 14B , Figure 15A and Figure 15B The tube body 200 may include a special-shaped tube, the outer side of the special-shaped tube may have a first groove 208 and the inner side may have one or more cavities, each of which may form a liquid inlet channel 201, a liquid outlet channel 202, a perfusion channel 203 or a guide wire channel 204, wherein a single-lumen tube may be arranged in the first groove 208, and the tube wall of the single-lumen tube may enclose the liquid inlet channel 201, the liquid outlet channel 202, the perfusion channel 203 or the guide wire channel 204. Any number of single-lumen tubes may be arranged in the first groove 208, see Figure 16A and Figure 16B , two single-lumen tubes are disposed in the first groove 208, and the two single-lumen tubes respectively form a guide wire channel 204 and an infusion channel 203. For example, see Figure 17A and Figure 17B A multi-lumen tube may be provided in the first groove 208, and the multi-lumen tube has multiple cavities, each of which may form a liquid inlet channel 201, a liquid outlet channel 202, an infusion channel 203 or a guide wire channel 204. The tube body 200 in the form of a special-shaped tube may be designed in any form as required, so that the ultrasonic ablation catheter may meet the needs of more different treatment methods.

[0082] In the ultrasonic ablation catheter provided by the present invention, the second infusion port 241 can be located at any position on the third tube segment 240, and the second infusion port 241 can be in any form that is easy for blood to flow through. Figure 18A The second perfusion port 241 can be arranged on the distal end surface of the third tube segment 240. The structure near the second perfusion port 241 is simpler, the blood can flow out of the perfusion channel 203 in a straight line, the blood flow in the blood vessel is smoother, and such a tube body 200 is easy to produce and process.

[0083] For example, see Figure 18B, the second perfusion port 241 may be provided on the side surface of the third pipe segment 240. There is a gap between the second perfusion port 241 and the second guide wire port 242, which can prevent the guide wire passing through the second guide wire port 242 from interfering with the blood flow out of the second perfusion port 241, and can also prevent the blood flow out of the second perfusion port 241 from interfering with the guide wire and changing the position of the guide wire.

[0084] Exemplarily, refer to Figure 18C , the side surface of the third pipe segment 240 may be recessed inward to form a second groove 243 communicating with the distal end surface of the third pipe segment 240, and the second perfusion port 241 may be provided in the second groove 243. The second groove 243 can guide the blood flow flowing out of the second perfusion port 241, reduce the turbulence of the blood flow when flowing out of the second perfusion port 241, and make the blood flow through the perfusion channel 203 flow more smoothly in the blood vessel.

[0085] Exemplarily, refer to Figure 2 and Figure 6 , a wire port 214 may be provided on the catheter seat 210. The wire 400 may pass through the wire port 214 into the tube body 200, and the wire 400 may pass through the tube body 200 at the first perfusion port 221 and may enter the chamber 110 to be connected to the ultrasonic transducer 300. Compared with providing another wire port on the tube body 200 for the wire 400 to pass through, the wire 400 passes through the tube body 200 at the first perfusion port 221 and enters the chamber 110 to be connected to the ultrasonic transducer 300, which can reduce the openings on the tube body 200 and make the overall structure simpler and easier to implement.

[0086] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation words such as "front", "rear", "upper", "lower", "left", "right", "lateral", "vertical", "perpendicular", "horizontal" and "top", "bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the protection scope of the present invention; the orientation words "inner" and "outer" refer to the inside and outside relative to the contour of each component itself.

[0087] For ease of description, regional relative terms such as "above", "over", "on the upper surface", "upper" etc. can be used here to describe the regional positional relationship between one or more components or features shown in the figure and other components or features. It should be understood that regional relative terms not only include the orientation of the components described in the figure, but also different orientations during use or operation. For example, if the components in the attached figure are inverted as a whole, the component "above other components or features" or "over other components or features" will include the situation where the component is "below other components or structures" or "under other components or structures". Thus, the exemplary term "above" can include both the orientations of "above" and "below". In addition, these components or features can also be positioned at other different angles (such as rotated 90 degrees or other angles), and this article is intended to cover all such situations.

[0088] It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present utility model. As used here, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, components, assemblies and / or combinations thereof.

[0089] It should be noted that the terms "first", "second", etc. in the description and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present utility model described here can be implemented in an order other than those illustrated or described here.

[0090] The present utility model has been illustrated by the above embodiments, but it should be understood that the above embodiments are only for the purpose of exemplification and illustration and are not intended to limit the present utility model within the scope of the described embodiments. In addition, those skilled in the art can understand that the present utility model is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the present utility model, and these variations and modifications all fall within the scope of protection required by the present utility model. The scope of protection of the present utility model is defined by the appended claims and their equivalent scope.

Claims

1. An ultrasonic ablation catheter, comprising a balloon and a tube body penetrating the balloon, wherein a chamber is formed inside the balloon, and an ultrasonic transducer is arranged in the chamber, characterized in that: The tube body has a catheter seat, a first tube section, a second tube section and a third tube section in the axial direction, the second tube section is located in the chamber, the ultrasonic transducer is arranged on the second tube section, the catheter seat is provided with a first liquid inlet and a first liquid outlet, the first tube section is provided with a first perfusion port, the second tube section is provided with a second liquid inlet and a second liquid outlet, and the third tube section is provided with a second perfusion port, Wherein, the tube body is provided with a liquid inlet channel, a liquid outlet channel and a perfusion channel, the liquid inlet channel is formed between the first liquid inlet and the second liquid inlet, the liquid outlet channel is formed between the second liquid outlet and the first liquid outlet, and the perfusion channel is formed between the first perfusion port and the second perfusion port.

2. The ultrasonic ablation catheter according to claim 1, characterized in that: The third tube segment is provided with a second guidewire port, and the tube body is provided with a guidewire channel, wherein the guidewire channel extends from the second guidewire port toward the proximal end of the tube body in the tube body, and the guidewire channel is used to be sleeved on the guidewire so that the ultrasonic ablation catheter moves along a preset extension path or a preset retraction path under the guidance of the guidewire.

3. The ultrasonic ablation catheter according to claim 2, characterized in that: The catheter seat is provided with a first guide wire port, and the guide wire channel is formed between the second guide wire port and the first guide wire port.

4. The ultrasonic ablation catheter according to claim 2, characterized in that: The first pipe section is provided with a first wire guide opening, and the wire guide channel is formed between the second wire guide opening and the first wire guide opening.

5. The ultrasonic ablation catheter according to claim 4, characterized in that: The first pipe section is provided with a combined through hole, and the combined through hole forms the first guide wire port and the first perfusion port.

6. The ultrasonic ablation catheter according to claim 5, characterized in that: A composite channel is formed in the tube body extending from the combined through hole toward the distal end of the tube body, and the composite channel is formed by a multi-lumen tube, one of the multiple lumens of the multi-lumen tube forms the guide wire channel, and at least one of the other lumens forms the perfusion channel.

7. The ultrasonic ablation catheter according to claim 6, characterized in that: A containing cavity is formed in the tube body, in which the composite channel and a plurality of single-lumen tubes are arranged. The plurality of single-lumen tubes are respectively surrounded by their own tube walls to form one of the liquid inlet channel, the liquid outlet channel, the perfusion channel and the guidewire channel.

8. The ultrasonic ablation catheter according to claim 6, characterized in that: The tube body includes a plurality of lumens, which respectively form one of the liquid inlet channel, the liquid outlet channel, the perfusion channel and the guidewire channel, and the composite channel is arranged in at least one of the plurality of lumens.

9. The ultrasonic ablation catheter according to claim 2, characterized in that: The tube body includes a plurality of lumens, and the plurality of lumens respectively form one of the liquid inlet channel, the liquid outlet channel, the perfusion channel and the guide wire channel.

10. The ultrasonic ablation catheter according to claim 9, characterized in that: At least one of the multiple lumens has at least one single lumen disposed therein, and the tube wall of the single lumen encloses the liquid inlet channel, the liquid outlet channel, the perfusion channel or the guide wire channel.

11. The ultrasonic ablation catheter according to claim 2, characterized in that: A containing cavity is formed in the tube body, and a plurality of single-lumen tubes are arranged in the containing cavity. The plurality of single-lumen tubes are respectively surrounded by respective tube walls to form one of the liquid inlet channel, the liquid outlet channel, the perfusion channel and the guidewire channel.

12. The ultrasonic ablation catheter according to claim 2, characterized in that: The tube body comprises a special-shaped tube, the outer side of the special-shaped tube has a first groove and the inner side has one or more cavities, each of the cavities forms the liquid inlet channel, the liquid outlet channel, the perfusion channel or the guide wire channel, Wherein, a single-lumen tube is arranged in the first groove, and the tube wall of the single-lumen tube encloses the liquid inlet channel, the liquid outlet channel, the perfusion channel or the guide wire channel; Alternatively, a multi-lumen tube is provided in the first groove, and a plurality of cavities are provided in the multi-lumen tube, and each of the cavities forms the liquid inlet channel, the liquid outlet channel, the perfusion channel or the guide wire channel.

13. The ultrasonic ablation catheter according to claim 1, characterized in that: The second liquid inlet is arranged at the proximal end of the second pipe section, the second liquid outlet is arranged at the distal end of the second pipe section, and the ultrasonic transducer is arranged between the second liquid inlet and the second liquid outlet.

14. The ultrasonic ablation catheter according to claim 1, characterized in that: The second filling port is arranged on the distal end surface of the third pipe segment; Alternatively, the second filling port is arranged on the side of the third pipe segment; Alternatively, the side surface of the third pipe segment is recessed inwardly to form a second groove connected to the distal end surface of the third pipe segment, and the second filling port is arranged in the second groove.

15. The ultrasonic ablation catheter according to claim 1, characterized in that: The catheter seat is provided with a wire port, through which a wire passes into the tube body, and the wire passes out of the tube body from the first infusion port and enters the chamber to be connected to the ultrasonic transducer.

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