Shock wave targeted therapy catheter for vascular calcification

Abstract

The invention relates to the technical field of medical instruments, in particular to a shock wave targeted therapy catheter for vascular calcification, which comprises a catheter, the catheter comprises an outer tube and an inner tube, a cavity is formed between the outer tube and the inner tube, a guide wire channel is arranged on the inner tube, a guide wire is arranged in the guide wire channel, and a guide wire guide ring is arranged on the guide wire; the near end of the catheter is provided with a connecting tube, the head end of the catheter is provided with a steering assembly, and one side of the steering assembly is provided with a treatment assembly. The guide wire is inserted into a blood vessel through the guide wire channel and reaches the vicinity of a blood vessel calcification area under the assistance of the guide wire guide ring to open up a path for the catheter, the catheter is matched with the guide wire in a guiding mode through the positioning assembly to lock a calcification part, and the treatment assembly emits shock waves for treatment through the metal conduction wire and the micro piezoelectric ceramic emission unit. And heat is taken away through circulation of cooling liquid in the cooling assembly, so that thermal damage to vascular tissues due to too high local temperature is prevented, and the treatment safety is guaranteed while the targeting property of the catheter is improved.

Description

Technical Field

[0001] The present invention relates to a shock wave targeted therapy catheter for vascular calcification, belonging to the technical field of medical devices. Background Art

[0002] Vascular calcification is an extremely common and critical pathological phenomenon in the field of cardiovascular diseases. During the complex operation of the human cardiovascular system, when vascular calcification occurs, calcium salts are abnormally deposited in the intima, media, or adventitia of the blood vessel wall. As the amount of calcium salt deposition gradually increases, the physical properties of the blood vessel wall change significantly. The originally elastic and flexible blood vessel wall gradually hardens, just like an originally elastic rubber tube gradually turning into a rigid steel pipe. This increase in hardness directly causes a significant reduction in the elasticity of the blood vessel, making it unable to effectively buffer the pressure fluctuations generated during the heart's pumping of blood, thereby seriously interfering with the normal vasomotor function of the blood vessel. The resistance to blood flow in it increases, the blood flow velocity slows down, and it is prone to a series of problems such as blood stasis and thrombosis formation.

[0003] Traditional interventional treatments such as balloon dilation and stent implantation are difficult to handle severe calcified lesions and may cause complications such as vascular dissection and restenosis. Although extracorporeal shock wave therapy has been proven to have certain efficacy in fields such as orthopedics, the existing devices and catheters for vascular calcification treatment lack precise targeting. They cannot accurately lock the calcified sites in the blood vessel, and it is difficult to accurately focus the energy on the calcified plaque when transmitting shock wave energy. This not only results in the treatment effect falling far short of expectations and making it difficult to effectively break up and eliminate the calcified plaque, but also because the energy cannot be precisely controlled, it is extremely easy to cause unnecessary damage to the normal tissues around the blood vessel, thereby increasing the risks and uncertainties of the treatment.

[0004] Therefore, it is urgent to improve the shock wave targeted therapy catheter for vascular calcification to solve the above existing problems. Summary of the Invention

[0005] The object of the present invention is to provide a shock wave targeted therapy catheter for vascular calcification. The guide wire is inserted into the blood vessel through the guide wire channel and reaches near the vascular calcification area with the assistance of the guide wire guiding ring to open a path for the catheter. The catheter cooperates with the guide of the guide wire through the positioning component to lock the calcified site. The treatment component emits shock waves for treatment by means of a metal conduction wire and a micro piezoelectric ceramic emission unit, and then the heat is taken away by the circulation of the coolant in the cooling component to prevent thermal damage to the blood vessel tissue due to excessive local temperature, so as to be able to improve the targeting of the catheter while ensuring the safety of the treatment.

[0006] To achieve the above object, the main technical solutions adopted by the present invention include: A shock wave targeted therapy catheter for vascular calcification, comprising a catheter. The catheter includes an outer tube and an inner tube. A chamber is formed between the outer tube and the inner tube. A guide wire channel is provided on the inner tube. A guide wire is arranged inside the guide wire channel. One end of the guide wire penetrates through the guide wire channel and extends to the outside of the guide wire channel. A plurality of evenly distributed guide wire guiding rings are arranged on the guide wire. All the plurality of guide wire guiding rings are fixedly installed inside the guide wire channel; A connecting tube is arranged at the proximal end of the catheter. The head end of the catheter is fixedly connected with a steering component. A treatment component is fixedly installed on one side of the steering component; A cooling component and a positioning component are arranged inside the chamber.

[0007] Preferably, one end of the guide wire away from the guide wire channel penetrates through the connecting tube and is connected with a handle. A rotation button is arranged on the handle. The rotation button is connected with the guide wire through a gear transmission mechanism. A push rod is arranged below the handle. The push rod is coaxially connected with the guide wire.

[0008] Preferably, a connecting head is fixedly connected above the connecting tube. Cooling joints are fixedly connected on both sides of the connecting tube. An optical fiber access head and a data transmission joint are fixedly connected below the connecting tube.

[0009] Preferably, the treatment component includes a metal conduction wire. The metal conduction wire is arranged inside the chamber. One end of the metal conduction wire is connected with a shock wave generator through the connecting head. The other end of the metal conduction wire is provided with an emission base. A plurality of evenly distributed micro piezoelectric ceramic emission units are embedded in the emission base. The plurality of micro piezoelectric ceramic emission units are arranged in a ring shape. All the plurality of micro piezoelectric ceramic emission units are connected with the metal conduction wire.

[0010] Preferably, a protective film is arranged outside the emission base. The protective film is adhered to the head end of the catheter through glue.

[0011] Preferably, the cooling component includes a cooling threaded tube. The cooling threaded tube is arranged inside the chamber. Coolant is arranged inside the cooling threaded tube. Both ends of the cooling threaded tube are respectively connected with a cooling circulation device through the two cooling joints.

[0012] Preferably, the positioning component includes an optical fiber channel. The optical fiber channel is arranged inside the chamber. An optical fiber is arranged inside the optical fiber channel. One end of the optical fiber penetrates through the optical fiber channel and the optical fiber access head and is connected with an optical coherence tomography device.

[0013] Preferably, the cooling spiral tube is disposed around the outer sides of the metal conduction wire and the optical fiber channel.

[0014] Preferably, the positioning assembly further includes a first micro electromagnetic sensor and a second micro electromagnetic sensor. The first micro electromagnetic sensor is embedded and installed at the distal end of the catheter, and the second micro electromagnetic sensor is embedded and installed at the head end of the guide wire. Both the first micro electromagnetic sensor and the second micro electromagnetic sensor are connected to the data transmission joint through wires, and the data transmission joint is connected to an electromagnetic positioning device through a wire.

[0015] Preferably, the steering assembly includes a first steering frame. The first steering frame is fixedly installed at the distal end of the catheter, and a corrugated hose is fixedly connected to the end of the first steering frame away from the catheter. A second steering frame is fixedly connected to the outer side of the corrugated hose. The emission base is fixedly installed on one side of the second steering frame. An annular frame is arranged between the first steering frame and the second steering frame. The annular frame is arranged on the outer side of the corrugated hose, and both the first steering frame and the second steering frame are hinged to the annular frame through rotating rods.

[0016] The present invention has at least the following beneficial effects: 1. In the present invention, the guide wire is inserted into the blood vessel through the guide wire channel and reaches near the blood vessel calcification area with the assistance of the guide wire guiding ring to open a path for the catheter. The catheter cooperates with the guide wire through the positioning assembly to lock the calcified part. The treatment assembly emits shock waves for treatment by means of the metal conduction wire and the micro piezoelectric ceramic emission unit, and then the heat is taken away by the circulating coolant in the cooling assembly to prevent thermal damage to the blood vessel tissue caused by excessive local temperature, so that while improving the targeting of the catheter, the safety of the treatment is also ensured.

[0017] 2. Through the mutual cooperation of the electromagnetic positioning device and the optical coherence tomography device in the present invention, during the treatment process, accurate guidance can be provided for the navigation of the catheter in the blood vessel, so that the treatment assembly can aim at the blood vessel calcification lesion with extremely high precision, realize the optimization of targeted treatment, and make the whole treatment process more efficient, accurate and safe.

[0018] 3. By means of the provided steering assembly in the present invention, when the catheter is operated in the blood vessel, the angle of the rotating rod can be adjusted by adjusting the direction of the catheter, and the direction of the second steering frame and the emission base can be changed to realize multi-dimensional steering. Furthermore, in a complex blood vessel environment, the micro piezoelectric ceramic emission unit on the emission base can be accurately aligned with the blood vessel calcification plaque, thereby effectively improving the targeting and accuracy of shock wave treatment. Description of the Drawings

[0019] The accompanying drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings: Figure 1 is a schematic diagram of the overall structure provided by the present invention; Figure 2 provided by the present invention Figure 1 is an enlarged view of part A in Figure 3 provided by the present invention Figure 1 is an enlarged view of part B in Figure 4 is a partial structural cross-section provided by the present invention Figure 1 ; Figure 5 is a partial structural schematic provided by the present invention Figure 1 ; Figure 6 is a partial structural cross-section provided by the present invention Figure 2 ; Figure 7 is a partial structural schematic provided by the present invention Figure 2 ; Figure 8 is a cross-sectional view of the catheter structure provided by the present invention.

[0020] In the figure, 1, catheter; 11, outer tube; 12, inner tube; 13, chamber; 14, guide wire channel; 2, guide wire; 21, guide wire guiding ring; 3, connecting tube; 31, connecting head; 32, cooling joint; 33, optical fiber access head; 34, data transmission joint; 4, steering assembly; 41, first steering frame; 42, corrugated hose; 43, second steering frame; 44, annular frame; 5, treatment assembly; 51, metal conduction wire; 52, emission base; 53, micro piezoelectric ceramic emission unit; 54, protective film; 6, cooling assembly; 61, cooling threaded tube; 7, positioning assembly; 71, optical fiber channel; 72, first micro electromagnetic sensor; 73, second micro electromagnetic sensor. Detailed Embodiments

[0021] The following will describe in detail the embodiments of the present application in conjunction with the accompanying drawings and embodiments, so as to fully understand how the present application uses technical means to solve technical problems and achieve the realization process of technical effects and implement accordingly.

[0022] As Figures 1-8As shown in the figure, the shock wave targeted therapy catheter for vascular calcification provided by this embodiment includes a catheter 1, and the catheter 1 includes an outer tube 11 and an inner tube 12. A chamber 13 is formed between the outer tube 11 and the inner tube 12, and a wire channel 14 is provided on the inner tube 12. A wire 2 is arranged inside the wire channel 14. One end of the wire 2 penetrates through the wire channel 14 and extends to the outside of the wire channel 14, and a number of evenly distributed wire guiding rings 21 are arranged on the wire 2. The number of wire guiding rings 21 are all fixedly installed inside the wire channel 14; A connecting tube 3 is arranged at the proximal end of the catheter 1, and a steering assembly 4 is fixedly connected to the head end of the catheter 1. A treatment assembly 5 is fixedly installed on one side of the steering assembly 4; A cooling assembly 6 and a positioning assembly 7 are arranged inside the chamber 13. During operation, first insert the wire 2 into the blood vessel through the wire channel 14, and one end of it extends out of the channel. Under the guidance and support of a number of wire guiding rings 21, it can smoothly pass through the blood vessel and reach near the vascular calcification area, establishing an accurate path for the subsequent entry of the catheter 1. The connecting tube 3 at the proximal end of the catheter 1 is used to connect external devices. The steering assembly 4 at the head end of the catheter 1 can adjust the direction inside the blood vessel to ensure that the treatment assembly 5 can accurately align with the vascular calcification site. The positioning assembly 7 in the chamber 13 further assists in determining the position of the catheter 1 in the blood vessel, cooperating with the guiding function of the wire 2, so that the treatment assembly 5 can lock the calcification site in the blood vessel, achieving precise positioning. When the treatment assembly 5 emits shock waves to treat the vascular calcification site, the cooling assembly 6 can effectively take away heat, preventing thermal damage to blood vessel tissues caused by excessive local temperature, thereby improving the targeting of the catheter 1 while ensuring the safety of the treatment; Further, as Figures 1-8 shown, the end of the wire 2 away from the wire channel 14 penetrates through the connecting tube 3 and is connected to a handle. A rotary button is arranged on the handle. The rotary button is connected to the wire 2 through a gear transmission mechanism. And a push rod is arranged below the handle. The push rod is coaxially connected with the wire 2. When the rotary button rotates, the wire 2 is controlled to rotate around its axis through gear transmission, facilitating the adjustment of the direction of the wire 2 in a complex blood vessel environment, enabling it to smoothly bypass blood vessel branches and bends and accurately advance towards the vascular calcification area. And the push rod coaxially connected below the handle can stably push the wire 2 forward or backward in a straight line direction. Cooperating with the rotation operation, it can control the three-dimensional position of the wire 2 in the blood vessel, realizing precise and stable control of the wire 2 during the process of establishing an accurate path for the catheter 1 to enter the blood vessel, thereby effectively improving the accuracy and safety of the catheter 1 in interventional treatment of vascular calcification; Even further, as Figures 1-8As shown, a connector 31 is fixedly connected to the top of the connecting tube 3, cooling connectors 32 are fixedly connected to both sides of the connecting tube 3, and an optical fiber access connector 33 and a data transmission connector 34 are fixedly connected to the bottom of the connecting tube 3. The treatment component 5 includes a metal conductive wire 51, which is arranged inside the chamber 13, and one end of the metal conductive wire 51 is connected to the shock wave generator through the connector 31, and the other end of the metal conductive wire 51 is provided with a transmitting base 52, and a plurality of uniformly distributed micro piezoelectric ceramic transmitting units 53 are embedded and installed on the transmitting base 52, and the plurality of micro piezoelectric ceramic transmitting units 53 are arranged in a ring shape, and the plurality of micro piezoelectric ceramic transmitting units 53 are connected to the metal conductive wire 51, and the outer side of the transmitting base 52 is provided with The protective film 54 is glued to the head end of the catheter 1 by glue. The cooling component 6 includes a cooling threaded tube 61, which is arranged inside the chamber 13. The cooling threaded tube 61 is provided with a coolant inside, and the two ends of the cooling threaded tube 61 are respectively connected to a cooling circulation device through two cooling joints 32. The positioning component 7 includes an optical fiber channel 71, which is arranged inside the chamber 13, and an optical fiber is arranged inside the optical fiber channel 71. One end of the optical fiber passes through the optical fiber channel 71 and the optical fiber access head 33 and is connected to an optical coherence tomography device. The cooling threaded tube 61 is arranged around the metal conductive wire 51 and the outer side of the optical fiber channel 71. The positioning component 7 also includes a first micro-electromagnetic sensor 72 and a second micro-electromagnetic sensor The first micro-electromagnetic sensor 72 is embedded and installed at the distal end of the catheter 1, and the second micro-electromagnetic sensor 73 is embedded and installed at the head end of the guide wire 2, and the first micro-electromagnetic sensor 72 and the second micro-electromagnetic sensor 73 are connected to the data transmission connector 34 through a wire, and the data transmission connector 34 is connected to the electromagnetic positioning device through a wire. The energy generated by the shock wave generator is transmitted to the micro-piezoelectric ceramic transmitting unit 53 at the transmitting base 52 through the connector 31 on the connecting tube 3 through the metal conductive wire 51. These micro-piezoelectric ceramic transmitting units 53 arranged in a ring use the piezoelectric effect to convert electrical energy into shock wave energy, so as to achieve precise shock treatment of vascular calcification. The protective film 54 protects the blood without affecting the shock wave emission. The cooling threaded tube 61 and its cooling circulation device connected to the cooling joint 32 can effectively take away the heat generated by the metal conductive wire 51 in the process of conducting energy through the circulation of the coolant in the cooling threaded tube 61, thereby preventing the blood vessels from being thermally damaged due to local overheating, and ensuring the safety and stability of the treatment. The optical fiber in the optical fiber channel 71 is connected to the optical coherence tomography device, which transmits and receives light signals to perform high-resolution imaging of the internal structure of the blood vessel, and accurately determine the location, size, shape and other information of the calcified part of the blood vessel. The data transmission joint 34 connects the first micro-electromagnetic sensor 72 and the second micro-electromagnetic sensor 73 with the electromagnetic positioning device. The first micro-electromagnetic sensor 72 is located at the distal end of the catheter 1.The second micro electromagnetic sensor 73 is located at the head end of the guide wire 2. The two work together to accurately determine the three-dimensional position information of the catheter 1 and the guide wire 2 in the blood vessel in real time. During the treatment process, it complements the imaging information of the optical coherence tomography device, provides accurate guidance for the navigation of the catheter 1 in the blood vessel, enables the treatment assembly 5 to accurately target the blood vessel calcification lesion with extremely high precision, realizes the optimization of targeted treatment, makes the entire treatment process more efficient, accurate and safe, and thus comprehensively improves the shock wave targeted treatment effect and quality for blood vessel calcification; Furthermore, as Figures 1-8 shown, the steering assembly 4 includes a first steering frame 41. The first steering frame 41 is fixedly installed at the distal end of the catheter 1. And one end of the first steering frame 41 away from the catheter 1 is fixedly connected with a corrugated hose 42. The outer side of the corrugated hose 42 is fixedly connected with a second steering frame 43. The emission base 52 is fixedly installed on one side of the second steering frame 43. And an annular frame 44 is arranged between the first steering frame 41 and the second steering frame 43. The annular frame 44 is arranged on the outer side of the corrugated hose 42. And both the first steering frame 41 and the second steering frame 43 are hinged to the annular frame 44 through rotating rods. The corrugated hose 42 connects the first steering frame 41 and the second steering frame 43, enabling the steering assembly 4 to adapt to the bending trend of the blood vessel, ensuring that the treatment assembly 5 can smoothly reach the calcified parts at different positions. And the second steering frame 43 is used to fix the emission base 52, so that the treatment assembly 5 remains stable in the blood vessel. The annular frame 44 is hinged to the first steering frame 41 and the second steering frame 43 through rotating rods, forming a stable and adjustable structural framework. When operating in the blood vessel, by adjusting the direction of the catheter 1 to adjust the angle of the rotating rod, the direction of the second steering frame 43 and the emission base 52 can be accurately changed, realizing multi-dimensional steering. Furthermore, in a complex blood vessel environment, the micro piezoelectric ceramic emission unit 53 on the emission base 52 can be accurately aligned with the blood vessel calcification plaque, thus effectively improving the targeting and accuracy of shock wave treatment; As Figures 1-8 shown, the principle of a shock wave targeted treatment catheter for blood vessel calcification provided in this embodiment is as follows: When treating a patient with blood vessel calcification, first pass the guide wire 2 through the guide wire channel 14 in the catheter 1, and then insert it into the blood vessel through percutaneous puncture. Under real-time monitoring of X-ray or other imaging, the doctor manipulates the guide wire 2 to advance in the blood vessel through the operating handle. During the advancement of the guide wire 2, the second micro electromagnetic sensor 73 on the guide wire 2 continuously sends position information to the electromagnetic positioning device outside the body. The doctor can clearly observe the position and trend of the guide wire 2 on the computer display screen to ensure that the guide wire 2 accurately enters the target blood vessel branch and approaches the calcification plaque; After the guide wire 2 reaches near the vascular calcification site, the catheter 1 is slowly pushed along the guide wire 2 into the blood vessel. Under the guidance of the guide wire 2, the catheter 1 successfully reaches the predetermined position. During the pushing process of the catheter 1, with the cooperation of the electromagnetic positioning device and the optical coherence tomography device, the three-dimensional coordinate position of the catheter 1 is determined by the first micro electromagnetic sensor 72. Then, the OCT technology of the optical fiber channel 71 is used to obtain the microscopic structure image of the blood vessel wall, and the relative position relationship between the head end of the catheter 1 and the calcified plaque is further confirmed. The doctor makes fine adjustments to the position of the catheter 1 according to this information, changes the directions of the second turntable 43 and the emission base 52, so that a plurality of micro piezoelectric ceramic emission units 53 can accurately align with the vascular calcification site; After the catheter 1 is accurately positioned, the shock wave generator is started. The doctor adjusts parameters such as the frequency and energy intensity of the shock wave on the operation console according to the pre-established treatment plan and the situation monitored in real time during the treatment process. The shock wave pulses generated by the shock wave generator are transmitted through the metal conduction wire 51 to a plurality of micro piezoelectric ceramic emission units 53 at the head end of the catheter 1, and the plurality of micro piezoelectric ceramic emission units 53 emit the shock waves towards the vascular calcification site to perform shock wave crushing treatment on the calcified plaque; During the treatment process, the cooling circulation device works continuously, and the coolant circulates in the cooling spiral tube 61 in the chamber 13 to take away heat and prevent the catheter 1 from overheating; at the same time, the protective film 54 at the head end of the catheter 1 buffers the contact force between the catheter 1 and the blood vessel wall to protect the blood vessel wall from mechanical damage; After the treatment is completed, the shock wave generator is stopped. First, the catheter 1 is slowly withdrawn from the blood vessel, and then the guide wire 2 is withdrawn. Postoperative observation and care are carried out on the patient to evaluate the treatment effect and formulate subsequent rehabilitation plans.

[0023] As certain terms are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in names as a way to distinguish components, but use the difference in functions of components as the criterion for distinction. As the term "comprising" mentioned throughout the specification and claims is an open-ended term, it should be interpreted as "comprising but not limited to". "Substantially" means within an acceptable error range. Those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0024] It should be noted that the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, such that a commodity or system comprising a series of elements not only includes those elements but also other elements not expressly listed, or elements inherent to such commodity or system. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the commodity or system comprising the element.

[0025] The above description illustrates and describes several preferred embodiments of the present invention. However, as previously mentioned, it should be understood that the present invention is not limited to the forms disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the inventive concept described herein through the above teachings or the techniques or knowledge in the relevant field. Any changes and modifications made by those skilled in the art without departing from the spirit and scope of the present invention shall fall within the protection scope of the appended claims of the present invention.

Claims

1. A shock wave targeting therapy catheter for vascular calcification, comprising a catheter (1), characterized in that: The catheter (1) includes an outer tube (11) and an inner tube (12). A chamber (13) is formed between the outer tube (11) and the inner tube (12). A guide wire channel (14) is provided on the inner tube (12). A guide wire (2) is arranged inside the guide wire channel (14). One end of the guide wire (2) penetrates through the guide wire channel (14) and extends to the outside of the guide wire channel (14). A number of evenly distributed guide wire guiding rings (21) are arranged on the guide wire (2). All the guide wire guiding rings (21) are fixedly installed inside the guide wire channel (14). A connecting tube (3) is provided at the proximal end of the catheter (1). A steering assembly (4) is fixedly connected to the head end of the catheter (1). A treatment assembly (5) is fixedly installed on one side of the steering assembly (4). A cooling assembly (6) and a positioning assembly (7) are arranged inside the chamber (13).

2. The shock wave targeted therapy catheter for vascular calcification according to claim 1, wherein: One end of the guide wire (2) away from the guide wire channel (14) penetrates through the connecting tube (3) and is connected to a handle. A rotation button is arranged on the handle. The rotation button is connected to the guide wire (2) through a gear transmission mechanism. A push rod is arranged below the handle. The push rod is coaxially connected to the guide wire (2).

3. The shock wave targeted therapy catheter for vascular calcification according to claim 2, characterized in that: A connecting head (31) is fixedly connected above the connecting tube (3). Cooling connectors (32) are fixedly connected to both sides of the connecting tube (3). An optical fiber access head (33) and a data transmission connector (34) are fixedly connected below the connecting tube (3).

4. A shock wave targeted therapy catheter for vascular calcification according to claim 3, characterized in that: The treatment assembly (5) includes a metal conduction wire (51). The metal conduction wire (51) is arranged inside the chamber (13). One end of the metal conduction wire (51) is connected to a shock wave generator through the connecting head (31). The other end of the metal conduction wire (51) is provided with an emission base (52). A number of evenly distributed micro piezoelectric ceramic emission units (53) are embedded in the emission base (52). The micro piezoelectric ceramic emission units (53) are arranged in a ring. All the micro piezoelectric ceramic emission units (53) are connected to the metal conduction wire (51).

5. A shock wave targeted therapy catheter for vascular calcification according to claim 4, characterized in that: A protective film (54) is arranged outside the emission base (52). The protective film (54) is pasted on the head end of the catheter (1) with glue.

6. The shock wave targeted therapy catheter for vascular calcification according to claim 5, characterized in that: The cooling assembly (6) includes a cooling threaded tube (61). The cooling threaded tube (61) is arranged inside the chamber (13). A coolant is arranged inside the cooling threaded tube (61). The two ends of the cooling threaded tube (61) are respectively connected to a cooling circulation device through the two cooling connectors (32).

7. A shock wave targeted therapy catheter for vascular calcification according to claim 6, characterized in that: The positioning assembly (7) includes an optical fiber channel (71). The optical fiber channel (71) is arranged inside the chamber (13). An optical fiber is arranged inside the optical fiber channel (71). One end of the optical fiber penetrates through the optical fiber channel (71) and the optical fiber access head (33) and is connected to an optical coherence tomography device.

8. A shock wave targeted therapy catheter for vascular calcification according to claim 7, characterized in that: The cooling screw tube (61) is disposed around the outer sides of the metal conduction wire (51) and the optical fiber channel (71).

9. The shock wave targeted therapy catheter for vascular calcification according to claim 8, characterized in that: The positioning assembly (7) further includes a first micro electromagnetic sensor (72) and a second micro electromagnetic sensor (73). The first micro electromagnetic sensor (72) is embedded and installed at the distal end of the catheter (1), and the second micro electromagnetic sensor (73) is embedded and installed at the head end of the guide wire (2). Both the first micro electromagnetic sensor (72) and the second micro electromagnetic sensor (73) are connected to the data transmission joint (34) through wires, and the data transmission joint (34) is connected to an electromagnetic positioning device through a wire.

10. A shock wave targeted therapy catheter for vascular calcification according to claim 9, characterized in that: The steering assembly (4) includes a first steering frame (41). The first steering frame (41) is fixedly installed at the distal end of the catheter (1), and one end of the first steering frame (41) away from the catheter (1) is fixedly connected to a corrugated hose (42). A second steering frame (43) is fixedly connected to the outer side of the corrugated hose (42). The emission base (52) is fixedly installed on one side of the second steering frame (43). An annular frame (44) is disposed between the first steering frame (41) and the second steering frame (43). The annular frame (44) is disposed on the outer side of the corrugated hose (42), and both the first steering frame (41) and the second steering frame (43) are hinged to the annular frame (44) through rotating rods.

Images