Blood pumping catheter

Abstract

The blood pumping catheter comprises a butt joint plug, a main cable, a first box body and a sheathing canal which are connected in sequence, a first signal driving wire penetrates through the sheathing canal, a second signal driving wire penetrates through the main cable, the near end of the first signal driving wire is connected with the far end of the second signal driving wire in the first box body, and the far end of the second signal driving wire is connected with the butt joint plug. A second box body is installed on the main cable between the butt joint plug and the first box body, and an electronic element is installed in the second box body. According to the embodiment of the invention, the distance between the electronic component and the control equipment is obviously shortened, the signal transmission delay is low, the electronic component is not easily interfered by other cables or an external environment, the signal transmission is not easily distorted, and the working reliability of the electronic component is improved.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a blood pumping catheter. Background Art

[0002] As a minimally invasive medical device, the blood pumping catheter can replace the function of a failing heart and provide circulatory support for patients with critical cardiovascular diseases such as complex coronary heart disease, acute myocardial infarction combined with cardiogenic shock, and acute decompensation of chronic heart failure. The blood pumping catheter contains at least electronic components, which are connected to the signal transmission module of the control device through some signal lines in the cable to achieve data interaction with the control device.

[0003] At present, electronic components are generally installed in a box close to the patient end, that is, far away from the control device. Since the signal line between the electronic components and the control device is too long, the signal transmission of the electronic components has a significant delay when working, and is easily affected by electromagnetic interference from other cables or the external environment, causing distortion of the transmitted signal, affecting the normal use of the electronic components. Utility Model Content

[0004] The embodiment of the present application provides a blood pumping catheter, which can significantly shorten the distance between the electronic component and the control device, has low signal transmission delay, is not easily affected by electromagnetic interference from other cables or the external environment, and is not easily distorted in signal transmission, thereby improving the working reliability of the electronic component.

[0005] In a first aspect, an embodiment of the present application provides a blood pumping catheter, which includes a docking plug, a main cable, a first box body and a sheath connected in sequence, a first signal driving line running through the sheath, a second signal driving line running through the main cable, a proximal end of the first signal driving line and a distal end of the second signal driving line are connected to each other in the first box body, a second box body is installed in the main cable between the docking plug and the first box body, electronic components are installed in the second box body, and the electronic components are used to be electrically connected to a control device.

[0006] In some embodiments, the electronic component is electrically connected to a signal transmission line, and the signal transmission line is used to electrically connect the electronic component to a signal transmission module of the control device.

[0007] In some embodiments, along the extension direction of the main cable, the distance between the second box body and the docking plug is within 50 cm; and / or, the second box body is connected to an auxiliary connector through an auxiliary cable, the signal transmission line runs through the auxiliary cable, and the proximal end of the signal transmission line is connected to the internal pin of the auxiliary connector.

[0008] In some embodiments, the second box body is provided with a accommodating cavity and a proximal interface connected to the accommodating cavity, the electronic component is located in the accommodating cavity, the distal end of the main cable between the second box body and the docking plug is fixed to the proximal interface, and a signal transmission line runs through the main cable between the second box body and the docking plug.

[0009] In some embodiments, the master cable is connected to a slave plug near the docking plug, and the proximal end of the signal transmission line is connected to the internal pin of the slave plug; or, the proximal end of the signal transmission line is connected to the internal pin of the docking plug.

[0010] In some embodiments, the second box body includes a seat body and a cover body that are openably and closably connected. When the cover body is in a closed state, the seat body and the cover body are combined to form a receiving cavity.

[0011] In some embodiments, one side edge of the cover body is rotatably connected to the base body through a connecting piece, and a matching snap-fit ​​structure is provided at the edge of the cover body away from the connecting piece and the corresponding position of the base body; and / or, one of the cover body and the base body is provided with a positioning sleeve, and the other is protrudingly provided with a positioning column adapted to the positioning sleeve, and the positioning column is inserted into the corresponding positioning sleeve when the cover body is in a closed state.

[0012] In some embodiments, the electronic components and the signal transmission lines are both soldered to the first circuit board, and the electronic components and the signal transmission lines are electrically connected through the conductive layer in the first circuit board; a limiting structure is protruded in the second box body to tightly abut against the first circuit board.

[0013] In some embodiments, optical fibers are passed through the sheath and the main cable, and the optical fibers extending from the sheath into the first box body are connected to the optical fibers extending from the main cable into the first box body in the first box body, and / or the optical fibers extending from the distal end and proximal end of the second box body into the second box body are connected to each other in the second box body.

[0014] In some embodiments, the second box body is integrally formed by an injection molding process; and / or, the second box body is provided with an electromagnetic shielding layer.

[0015] The blood pump catheter of the embodiment of the present application comprises a docking plug, a main cable, a first box body and a sheath connected in sequence, a first signal driving line running through the sheath, a second signal driving line running through the main cable, a proximal end of the first signal driving line and a distal end of the second signal driving line connected in the first box body, a second box body is installed in the main cable between the docking plug and the first box body, and electronic components are installed in the second box body, and the electronic components are used to be electrically connected to the control device. Compared with the solution of installing the electronic components in the box body close to the patient end in the prior art, the present application significantly shortens the distance between the electronic components and the control device by setting the second box body between the docking plug and the first box body and installing the electronic components in the second box body, the signal transmission delay is low, and it is not easily affected by electromagnetic interference from other cables or the external environment, the signal transmission is not easily distorted, and the working reliability of the electronic components is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] Figure 1 A schematic diagram of the structure of a blood pumping catheter provided in an embodiment of the present application;

[0018] Figure 2 A schematic diagram of the internal structure of a second box body provided in one embodiment of the present application;

[0019] Figure 3 A schematic diagram of the internal structure of a second box body provided in another embodiment of the present application;

[0020] Figure 4 A schematic diagram of the internal structure of a second box body provided in yet another embodiment of the present application;

[0021] Figure 5 A schematic diagram of the internal structure of a first box body provided in one embodiment of the present application;

[0022] Figure 6 A schematic diagram of the internal structure of a first box body provided in another embodiment of the present application.

[0023] In the figure:

[0024] 1. Control device; 101. Main interface; 102. Auxiliary interface; 2. Docking plug; 3. Second box body; 301. Accommodating cavity; 3011. Second sub-cavity; 3012. First sub-cavity; 302. Cover body; 303. Base body; 3031. Block; 304. Connector; 305. Positioning column; 306. Positioning sleeve; 307. First limit block; 308. Second limit block; 4. Infusion pipeline; 5. Drainage pipeline; 6. Pipeline lead-out assembly; 7. Main cable; 701. Second signal drive line; 8. First box body; 9. Bacterial-resistance sheath; 10. Positioning device; 11. Sheath; 1101. First signal drive line; 12. Motor; 13. Blood passage; 14. Electronic component; 15. Auxiliary cable; 16. Auxiliary connector; 17. First circuit board; 18. Optical fiber connector; 19. Second circuit board. DETAILED DESCRIPTION

[0025] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0027] In addition, it should be noted that, in the description of the embodiments of the present application, unless otherwise clearly defined, "in vivo" means inside the tissues and organs of the patient, and "in vitro" means outside the tissues and organs of the patient. At the same time, in the embodiments of the present application, "distal" refers to the direction away from the physician, that is, the direction close to the patient; "proximal" refers to the direction close to the physician, that is, the direction away from the patient.

[0028] The blood pump catheter at least includes an electronic component, which is connected to a signal transmission module of a control device through a portion of a signal line in the cable to achieve data interaction with the control device, wherein the electronic component may have a data storage function. Currently, the electronic component is generally installed in a box body close to the patient end, that is, at a location far away from the control device.

[0029] The inventors of this application have discovered that because the signal line between the electronic components and the control device is too long, the signal transmission of the electronic components has a significant delay when working, and is easily affected by electromagnetic interference from other cables or the external environment, causing distortion of the transmitted signal, affecting the normal use of the electronic components.

[0030] In order to solve the problems in the prior art, the present application provides a blood pumping catheter, which is described in detail below in conjunction with the accompanying drawings.

[0031] Figure 1 A schematic diagram of the structure of a blood pumping catheter provided in an embodiment of the present application; Figure 5 A schematic diagram of the internal structure of a first box body 8 provided in one embodiment of the present application; Figure 6 A schematic diagram of the internal structure of a first box body 8 provided in another embodiment of the present application.

[0032] See also Figure 1 , Figure 5 and Figure 6 The embodiment of the present application provides a blood pump catheter, comprising a docking plug 2, a main cable 7, a first box body 8 and a sheath 11 connected in sequence, a first signal driving line 1101 running through the sheath 11, a second signal driving line 701 running through the main cable 7, the proximal end of the first signal driving line 1101 and the distal end of the second signal driving line 701 are connected in the first box body 8, wherein the proximal end of the first signal driving line 1101 and the distal end of the second signal driving line 701 can be electrically connected by direct welding, wire connector connection, etc., the distal end of the first signal driving line 1101 is used to electrically connect a working device (such as a motor) installed at the distal end of the sheath 11, and the proximal end of the second signal driving line 701 is electrically connected to the docking plug 2 to receive a driving signal through the docking plug 2. The main cable 7 between the docking plug 2 and the first box body 8 is installed with a second box body 3, and an electronic component 14 is installed in the second box body 3, and the electronic component 14 is used to be electrically connected to the control device 1.

[0033] It can be understood that the electronic component 14 in the present application is used to receive, store, process and send data information related to the blood pumping catheter. In some embodiments, the electronic component 14 can be a storage element. In some of the implementations, the storage element can be used to store the operating parameters of the working device or the data monitored by the sensor on the working device. In some other replaceable implementations, the storage element can also be used to pre-store the processing logic related to the working device. In some other embodiments, the electronic component 14 can also be a data processing element. The data processing element can be used to process the relevant data. It can be understood that the above embodiments are only partial examples of the electronic component 14, and electronic components 14 of other forms and functions are also within the scope of protection of the present application, and the present application does not make specific limitations on this.

[0034] Specifically, in some embodiments, the blood pumping catheter may also include a pipeline lead-out assembly 6 installed on the main cable 7, a bacteria-resistant sheath 9, a positioning device 10, a motor 12, and a blood passage 13 connected to the distal end of the motor 12 through a sheath 11 in sequence from the distal end of the first box body 8. The blood passage 13 is used to intervene in the corresponding ventricle and / or artery; the motor 12 is located at the proximal end of the blood passage 13, and the impeller of the motor 12 can accelerate the flow of blood in the pumping direction and increase the blood flow rate; the positioning device 10 and the antibacterial sheath 9 are used to fix and adjust the sheath 11 during the surgical operation, so that the blood passage 13 and the motor 12 intervene in the predetermined position of the corresponding ventricle or artery, and at the same time, provide a barrier outside the body to reduce the risk of external bacteria and microorganisms entering the blood circulation; the first box body 8 is used to connect the main cable 7 and the sheath 11; the pipeline lead-out assembly 6 is at least used to lead out the perfusion pipeline 4 in the main cable 7, so that the proximal end of the perfusion pipeline 4 can be connected to the liquid supply port of the control device 1, the perfusion pipeline 4 runs through the main cable 7 and the sheath 11, and the distal end of the perfusion pipeline 4 is connected to the heat dissipation cavity of the motor 12. After the perfusion liquid flows through the perfusion pipeline 4 from the liquid supply port of the control device 1, it can cool the motor 12.

[0035] Compared with the solution of installing the electronic component 14 in the box body close to the patient end in the prior art, the present application significantly shortens the distance between the electronic component 14 and the control device 1 by setting the second box body 3 between the docking plug 2 and the first box body 8 and installing the electronic component 14 in the second box body 3, and the signal transmission delay is low, and it is not easy to be electromagnetically interfered by other cables or the external environment, and the signal transmission is not easy to be distorted, thereby improving the working reliability of the electronic component 14; in the process of adding the second box body on the basis of the existing structure of the blood pumping catheter, it is not necessary to make many adjustments and designs to the remaining parts of the blood pumping catheter to realize the present technical solution, so the present technical solution has a wide range of application, and the design cost and production cost of improving the existing structure of the blood pumping catheter are low; in addition, the distal end of the first signal driving line 1101 can be welded to the motor 12 in advance at the motor 12 manufacturer, and in the final assembly of the blood pumping catheter, it is only necessary to connect the first signal driving line 1101 and the second signal driving line 701 in the first box body 8, which can reduce the difficulty and defect rate of the assembly of the blood pumping catheter and improve the assembly efficiency.

[0036] In some embodiments, the electronic component 14 is electrically connected to a signal transmission line, and the signal transmission line is used to electrically connect the electronic component 14 to the signal transmission module of the control device 1. Compared with the technical solution of wireless connection between the electronic component 14 and the control device 1, the present application sets a signal transmission line, and the electronic component 14 can be powered by the signal transmission line. There is no need to set up an independent power supply to power the electronic component 14. In addition, the signal transmission line can also enhance the stability of signal transmission between the electronic component 14 and the control device 1.

[0037] It should be noted that the main cable 7 contains at least a signal line for transmitting electrical signals, such as the second signal drive line 701 mentioned above. The signal line can be used as a drive line to provide power to the motor 12, sensors and other devices in the blood pumping catheter; the signal line can also transmit the data signal collected by the sensor in the blood pumping catheter to the control device 1 in the form of an electrical signal. In some embodiments, the signal transmission module of the control device 1 is at least provided with a main interface 101, and the main cable 7 also contains an optical fiber for transmitting optical signals. The proximal end of the docking plug 2 is fixedly connected with an optical fiber core, and the optical fiber extending from the main cable 7 to the docking plug 2 is installed at the distal end of the optical fiber core, and the proximal end of the optical fiber core is used to be plugged into the main interface 101 to transmit data to the signal transmission module of the control device 1. Specifically, the optical fiber can transmit the data signal collected by the optical fiber pressure sensor, optical fiber temperature sensor, etc. in the blood pumping catheter to the control device 1 in the form of an optical signal.

[0038] like Figure 1As shown, in some embodiments, the second box body 3 is located between the pipeline lead-out assembly 6 and the docking plug 2, that is, the second box body 3 is isolated from the perfusion pipeline 4, which can largely avoid the overflow of the perfusion liquid due to the damage of the perfusion pipeline 4 from soaking the electronic components 14 in the second box body 3, thereby improving the safety of the electronic components 14.

[0039] like Figure 1 As shown, in some embodiments, the main cable 7 and the sheath tube 11 are penetrated by an irrigation pipeline 4 and a drainage pipeline 5, the proximal end of the irrigation pipeline 4 extends from one port of the pipeline lead-out assembly 6 and is connected to the liquid supply port of the control device 1, the proximal end of the drainage pipeline 5 extends from another port of the pipeline lead-out assembly 6 and is connected to the return port of the control device 1, the distal end of the irrigation pipeline 4 is connected to the inlet of the heat dissipation cavity of the motor 12, and the distal end of the drainage pipeline 5 is connected to the outlet of the heat dissipation cavity of the motor 12. The prior art does not have a drainage pipeline 5, and the irrigation liquid will further flow into the patient's body after flowing through the heat dissipation cavity through the irrigation pipeline 4, which is easy to cause discomfort to the patient; in addition, since the total amount of irrigation liquid that can be absorbed by the patient is limited, it is necessary to control the flow rate of the irrigation liquid within a predetermined range to control the total amount of irrigation liquid entering the patient's body during the operation to meet the requirements, resulting in unsatisfactory heat dissipation effect of the motor 12. After the drainage pipeline 5 is set in the present application, the perfusion liquid flowing through the heat dissipation cavity can flow to the reflux port of the control device 1 through the drainage pipeline 5, which can prevent the perfusion liquid from flowing into the patient's body and reduce the risk of discomfort to the patient. In addition, the heat dissipation effect of the motor 12 can also be improved by increasing the flow rate of the perfusion liquid.

[0040] In some embodiments, along the extension direction of the main cable 7 , the distance between the second box body 3 and the docking plug 2 is within 50 cm, further ensuring a relatively short distance between the electronic component 14 and the control device 1 , thereby improving the working reliability of the electronic component 14 .

[0041] Figure 2 This is a schematic diagram of the internal structure of the second box body 3 provided in one embodiment of the present application.

[0042] like Figure 2As shown, in some embodiments, the second box body 3 is connected to an auxiliary connector 16 through an auxiliary cable 15, and the signal transmission line connected to the electronic component 14 runs through the auxiliary cable 15, and the proximal end of the signal transmission line connected to the electronic component 14 is connected to the internal pin of the auxiliary connector 16. The signal transmission module of the control device 1 is also provided with an auxiliary interface 102 adapted to the auxiliary connector 16, and the auxiliary connector 16 is used to be plugged into the auxiliary interface 102 to be electrically connected to the signal transmission module of the control device 1. The main cable 7 and the auxiliary cable 15 are independent of each other. During the process of assembling and replacing the electronic component 14, the staff will not directly contact the components in the main cable 7, which plays a certain degree of protection role for the components in the main cable 7. Specifically, the auxiliary connector 16 can be in the form of a USB connector, a Mini-USB connector, an RJ45 connector, a coaxial cable connector, etc.

[0043] Figure 3 This is a schematic diagram of the internal structure of the second box body 3 provided in another embodiment of the present application.

[0044] like Figure 3 As shown, in some embodiments, the second box body 3 is provided with a housing cavity 301 and a proximal interface connected to the housing cavity 301, the electronic component 14 is located in the housing cavity 301, and the distal end of the main cable 7 between the second box body 3 and the docking plug 2 is fixed to the proximal interface. Specifically, the second box body 3 is also provided with a distal interface connected to the housing cavity 301, and the proximal end of the main cable 7 between the second box body 3 and the first box body 8 is fixed to the distal interface. The proximal interface and the distal interface can be fixed to the main cable 7 at the corresponding position by interference fit, crimping or bonding. A signal transmission line connected to the electronic component 14 runs through the main cable 7 between the second box body 3 and the docking plug 2, so that the signal transmission module of the control device can exchange data with the electronic component 14 through the signal transmission line. Compared with the solution of setting the auxiliary cable 15, this solution has a higher degree of integration.

[0045] In some embodiments, the main cable is connected to a slave plug at a position close to the docking plug, and the proximal end of the signal transmission line is connected to the internal pin of the slave plug. The slave plug can be plugged into the auxiliary interface 102 to be electrically connected to the signal transmission module of the control device 1, so that data can be exchanged between the signal transmission module of the control device 1 and the electronic component 14 through the slave plug and the signal transmission line.

[0046] In some embodiments, the proximal end of the signal transmission line connected to the electronic component 14 is connected to the internal pin of the docking plug 2. When the docking plug 2 is plugged into the main interface 101, the electronic component 14 can be electrically connected to the signal transmission module, which can further improve the integration of the blood pumping catheter.

[0047] Figure 4This is a schematic diagram of the internal structure of the second box body 3 provided in yet another embodiment of the present application.

[0048] like Figure 4 As shown, in some embodiments, the second box body 3 includes a seat body 303 and a cover body 302 that can be opened and closed. When the cover body 302 is in a closed state, the seat body 303 and the cover body 302 are surrounded to form a receiving chamber. Specifically, in this embodiment, the seat body 303 is provided with a first sub-cavity 3012, and the cover body 302 is provided with a second sub-cavity 3011. When the cover body 302 is in a closed state, the first sub-cavity 3012 and the second sub-cavity 3011 together constitute the receiving chamber 301. When the electronic component 14 has a process error such as a cold solder joint or the electronic component 14 itself is damaged, the cover body 302 can be opened to replace the electronic component 14, which is easy to operate and has a lower cost than directly replacing the docking plug 2 or directly replacing the blood pump catheter. In some other embodiments, the receiving chamber 301 may only include the first sub-cavity 3012 or only include the second sub-cavity 3011.

[0049] like Figure 4 As shown, in some embodiments, one side edge of the cover body 302 is rotatably connected to the base body 303 through a connecting piece 304. Specifically, in this embodiment, the connecting piece 304 is a bendable injection molded part, and the cover body 302, the connecting piece 304 and the base body 303 are integrally formed through an injection molding process, so that the second box body 3 has a higher production efficiency. In other embodiments, the connecting piece 304 can also be a pivot, a hinge or other structures.

[0050] like Figure 4 As shown, in some embodiments, the edge of the cover 302 away from the connecting member 304 and the corresponding position of the base 303 are provided with a matching snap-fit ​​structure, so that the cover 302 can be in a relatively stable closed state. Specifically, in this embodiment, the snap-fit ​​structure includes a snap-fit ​​slot provided on the cover 302 and a snap-fit ​​block 3031 provided on the base 303, and when the cover 302 is in the closed state, the snap-fit ​​block 3031 is snapped into the snap-fit ​​slot.

[0051] like Figure 4As shown, in some embodiments, one of the cover body 302 and the seat body 303 is provided with a positioning sleeve 306, and the other is provided with a positioning column 305 matched with the positioning sleeve 306. When the cover body 302 is in a closed state, the positioning column 305 is plugged into the corresponding positioning sleeve 306. Specifically, in this embodiment, the positioning sleeve 306 is convexly provided on the seat body 303, and the positioning column 305 is convexly provided on the cover body 302. After the cover body 302 is closed, the positioning column 305 can be plugged into the positioning sleeve 306, and the positioning column 305 is coaxial with the positioning sleeve 306. The positioning column 305 cooperates with the positioning sleeve 306, which can further prevent the cover body 302 from being displaced relative to the seat body 303 in a direction perpendicular to the axis of the positioning column 305, thereby improving the stability of the cover body 302 when it is in a closed state.

[0052] It should be noted that the positioning sleeve 306 is provided with a positioning hole for the positioning column 305 to be inserted. During the closing process of the cover body 302, the angle between the axis of the positioning hole and the axis of the positioning column 305 will gradually become smaller; after the end of the positioning column 305 away from the cover body 302 abuts against the position of the positioning hole away from the seat body 303, the cover body 302 continues to close. Under the action of the interaction force between the end of the positioning column 305 away from the cover body 302 and the positioning sleeve 306, the positioning sleeve 306 relative to the seat body 303 and the positioning column 305 relative to the cover body 302 will undergo a small position change, so that the positioning column 305 can be smoothly inserted into the positioning hole; after the cover body 302 is completely closed, the position of the positioning sleeve 306 relative to the seat body 303 and the position of the positioning column 305 relative to the cover body 302 will return to their original state, so that the positioning hole and the positioning column 305 are coaxial.

[0053] In some embodiments, the electronic component 14 can be directly welded to the corresponding signal transmission line, which has a simple structure and can flexibly arrange the specific position of the electronic component 14 in the second box body 3.

[0054] like Figure 3 and Figure 4As shown, in some embodiments, the electronic component 14 and the corresponding signal transmission line are both welded to the first circuit board 17, and the electronic component 14 and the corresponding signal transmission line are electrically connected through the conductive layer in the first circuit board 17. In the scheme of directly welding the signal transmission line to the pin of the electronic component 14, since the electronic component 14 is small, it is not easy to position the electronic component 14, so the pin of the electronic component 14 and the end of the signal transmission line to be welded are prone to relative shaking, and the risk of cold welding is relatively high. In the technical scheme, a first circuit board 17 is provided. Since the first circuit board 17 is larger than the electronic component 14, it is easy to position the first circuit board 17, and in the process of welding the electronic component 14, the electronic component 14 can be directly pressed against the pad of the first circuit board 17, so that the electronic component 14 and the first circuit board 17 remain relatively fixed during the welding process; in addition, under the premise of fixing the first circuit board 17, it is also relatively easy to weld the end of the signal transmission line to be welded. Therefore, it is easy to achieve a high connection strength between the first circuit board 17 and the electronic component 14, and between the first circuit board 17 and the corresponding signal transmission line through welding, and it is not easy to cold weld, which has the advantage of stable connection.

[0055] like Figure 4 As shown, in some embodiments, a limiting structure is convexly provided in the second box body 3, that is, at least one of the first sub-cavity 3012 and the second sub-cavity 3011 is convexly provided with a limiting structure for pressing against the first circuit board 17. Specifically, the limiting structure includes at least one group of first limiting blocks 307 arranged opposite to each other, and the first limiting blocks 307 are convexly provided on the base body 303 and / or the cover body 302, and are used to press against the edge position of the first circuit board 17 to prevent the first circuit board 17 from shaking randomly in the accommodating cavity 301, thereby reducing the risk of damage to the electronic component 14 due to collision and desoldering of the first circuit board 17.

[0056] like Figure 3 and Figure 4As shown, in some embodiments, optical fibers are passed through the sheath tube 11 and the main cable 7, and the optical fibers extending from the sheath tube 11 into the first box body 8 are connected to the optical fibers extending from the main cable into the first box body 8 in the first box body 8, and / or, the optical fibers extending from the distal end and the proximal end of the second box body 3 into the second box body 3 are connected in the second box body 3. That is, the optical fibers extending from the sheath tube 11 into the first box body 8 are connected to the optical fibers extending from the main cable into the first box body 8 through corresponding optical fiber connectors 18, and / or, the optical fibers extending into the accommodating cavity 301 through the proximal interface are connected to the optical fibers extending into the accommodating cavity 301 through the distal interface through corresponding optical fiber connectors 18. During the installation of the second box body 3, the optical fiber extending into the accommodating cavity 301 through the proximal interface is connected with the optical fiber extending into the accommodating cavity 301 through the distal interface through the corresponding optical connector, which can improve the production yield of the blood pumping catheter and prevent the optical fiber at the corresponding position from being damaged due to excessive bending before the installation of the second box body 3. Similarly, arranging an optical fiber connector in the first box body 8 can also achieve similar technical effects, which will not be repeated here.

[0057] like Figure 4 As shown, the limiting structure also includes a second limiting block 308 protruding from the seat body 303 and / or the cover body 302, and the second limiting blocks 308 are arranged in at least two groups, each group includes two relatively arranged second limiting blocks 308, one group is arranged on both sides of the optical fiber extending into the accommodating cavity 301 through the proximal interface, and the other group is arranged on both sides of the optical fiber extending into the accommodating cavity 301 through the distal interface, so as to prevent the corresponding optical fiber from shaking randomly in the accommodating cavity 301, thereby reducing the risk of damage to the corresponding optical fiber due to bumps or excessive bending.

[0058] like Figure 5 As shown, in some embodiments, the wire diameter of the first signal driving wire 1101 is smaller than the wire diameter of the second signal driving wire 701. Since the sheath 11 needs to be inserted into the patient's body, the diameter of the sheath 11 is smaller than the diameter of the main cable 7, and the wire diameter of the first signal driving wire 1101 accommodated in the sheath 11 should not be too large. Installing the second signal driving wire 701 with a relatively large wire diameter in the main cable 7 can reduce the risk of the second signal driving wire 701 breaking during the bending of the main cable 7.

[0059] like Figure 6As shown, in some embodiments, a second circuit board 19 is installed in the first box body 8, and the first signal driving line 1101 and the second signal driving line 701 are respectively welded to the second circuit board 19, and the first signal driving line 1101 and the corresponding second signal driving line 701 are electrically connected through the corresponding conductive layer in the second circuit board 19. In the scheme of directly welding the first signal driving line 1101 and the second signal driving line 701, since the proximal end of the first signal driving line 1101 to be welded and the distal end of the second signal driving line 701 are both prone to shaking, the welding difficulty is relatively large and a cold solder joint is prone to occur. In the technical solution, a second circuit board 19 is provided, and the second circuit board 19 is easy to position, so the welding difficulty can be relatively reduced, and the risk of a cold solder joint is reduced.

[0060] In some embodiments, the second box body 3 is integrally formed by an injection molding process, which can achieve higher production efficiency.

[0061] In some embodiments, the second box body 3 is provided with an electromagnetic shielding layer. Specifically, the second box body 3 can be made of a material with a shielding effect, or an electromagnetic wave shielding paint can be coated on the surface of the second box body 3 to further reduce the electromagnetic interference of the external environment to the electronic component 14.

[0062] The above are only specific implementation methods of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A blood pumping catheter, characterized in that: It includes a docking plug, a main cable, a first box body and a sheath tube connected in sequence, A first signal driving wire runs through the sheath tube, a second signal driving wire runs through the main cable, and a proximal end of the first signal driving wire and a distal end of the second signal driving wire are connected in the first box body. A second box body is installed on the main cable between the docking plug and the first box body, and electronic components are installed in the second box body. The electronic components are used to be electrically connected to a control device.

2. The blood pumping catheter according to claim 1, characterized in that: The electronic component is electrically connected to a signal transmission line, and the signal transmission line is used to electrically connect the electronic component to a signal transmission module of a control device.

3. The blood pumping catheter according to claim 2, characterized in that: Along the extension direction of the main cable, the distance between the second box body and the docking plug is within 50 cm; And / or, the second box body is connected to an auxiliary connector via an auxiliary cable, the signal transmission line passes through the auxiliary cable, and the proximal end of the signal transmission line is connected to an internal pin of the auxiliary connector.

4. The blood pumping catheter according to claim 2, characterized in that: The second box body is provided with a accommodating cavity and a proximal interface connected to the accommodating cavity, the electronic component is located in the accommodating cavity, the distal end of the main cable between the second box body and the docking plug is fixedly connected to the proximal interface, and the signal transmission line runs through the main cable between the second box body and the docking plug.

5. The blood pumping catheter according to claim 4, characterized in that: The master cable is connected to a slave plug at a position close to the docking plug, and the proximal end of the signal transmission line is connected to an internal pin of the slave plug; or, The proximal end of the signal transmission line is connected to the inner pin of the docking plug.

6. The blood pumping catheter according to claim 4, characterized in that: The second box body comprises a seat body and a cover body which are openably and closably connected. When the cover body is in a closed state, the seat body and the cover body are combined to form the accommodating cavity.

7. The blood pumping catheter according to claim 6, characterized in that: One side edge of the cover is rotatably connected to the base through a connecting piece, and a matching engaging structure is provided at a corresponding position of the cover away from the connecting piece and the base; and / or, One of the cover body and the seat body is provided with a positioning sleeve, and the other is provided with a positioning column matched with the positioning sleeve. When the cover body is in a closed state, the positioning column is inserted into the corresponding positioning sleeve.

8. The blood pumping catheter according to claim 2, characterized in that: The electronic component and the signal transmission line are both soldered to the first circuit board, and the electronic component and the signal transmission line are electrically connected via a conductive layer in the first circuit board; A limiting structure is protruded inside the second box body for tightly contacting the first circuit board.

9. The blood pumping catheter according to claim 2, characterized in that: Optical fibers are inserted through the sheath tube and the main cable. The optical fibers extending from the sheath tube into the first box body are connected to the optical fibers extending from the main cable into the first box body within the first box body, and / or the optical fibers extending from the distal end and proximal end of the second box body into the second box body are connected to each other within the second box body.

10. The blood pumping catheter according to claim 1, characterized in that: The second box body is integrally formed by an injection molding process; and / or, The second box body is provided with an electromagnetic shielding layer.

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