Ventricular assist system

Abstract

The application provides a ventricular assist system, which comprises a ventricular assist device, a control circuit for controlling the operation of the ventricular assist device, a controller for setting and displaying the operation parameters of the ventricular assist device, and a percutaneous cable for connecting the controller and the control circuit, wherein the percutaneous cable comprises a CAN communication wire for transmitting information and / or control signals between the controller and the control circuit. The percutaneous cable in the application adopts a single CAN communication wire to transmit information between the controller and the ventricular assist device, so that the size of the percutaneous cable can be effectively reduced when the ventricular assist device is controlled to operate, and the infection risk of the percutaneous cable through the skin part is reduced.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and more particularly to a ventricular assist system. Background Technology

[0002] A ventricular assist system (VAS) is an electromechanical device used to assist cardiac circulation. It is widely used in patients recovering from myocardial infarction (heart attack) and cardiac surgery to partially or completely replace the function of a failing heart. A VAS mainly consists of an implanted ventricular assist device, an external controller, and a power supply assembly. The controller is connected to the ventricular assist device via a percutaneous cable.

[0003] There are certain risks associated with the use of ventricular assist devices, such as the risk of infection at the site where the percutaneous cable penetrates the skin. To reduce this risk, it is desirable to obtain the smallest and most flexible percutaneous cable possible. Therefore, it is desirable to reduce the number of leads in the percutaneous cable. Summary of the Invention

[0004] This application provides a ventricular assist system that can reduce the number of communication wires in the percutaneous cable while ensuring information transmission between the controller and the ventricular assist device.

[0005] In a first aspect, embodiments of this application provide a ventricular assist system, the ventricular assist system comprising:

[0006] A ventricular assist device, comprising a control circuit for controlling the operation of the ventricular assist device;

[0007] The controller is used to set and display the operating parameters of the ventricular assist device;

[0008] A sheathed cable is used to connect the controller to the control circuit, the sheathed cable including a CAN communication wire, a single CAN communication wire being used to transmit information and / or control signals between the controller and the control circuit.

[0009] Secondly, this application provides a ventricular assist system, the ventricular assist system comprising:

[0010] A left ventricular assist device, having a first control circuit for controlling the operation of the left ventricular assist device;

[0011] A right ventricular assist device, having a second control circuit for controlling the operation of the right ventricular assist device;

[0012] The controller is used to set and display the operating parameters of the left ventricular assist device and the right ventricular assist device;

[0013] A sheathed cable is used to connect the controller to the first control circuit and the second control circuit respectively. The sheathed cable includes a CAN communication wire, and a single CAN communication wire is used to transmit information and / or control signals.

[0014] Thirdly, embodiments of this application provide a medical device, which includes the ventricular assist system described in the first or second aspect above.

[0015] The ventricular assist device provided in this application includes: a ventricular assist device with a control circuit for controlling the operation of the ventricular assist device; a controller for setting and displaying the operating parameters of the ventricular assist device; and a percutaneous cable for connecting the controller to the control circuit. The percutaneous cable includes a CAN communication wire, which is used to transmit information and / or control signals between the controller and the control circuit. The percutaneous cable in this application uses a single CAN communication wire for information transmission between the controller and the ventricular assist device, effectively reducing the size of the percutaneous cable and the risk of infection at the skin crossing site while controlling the operation of the ventricular assist device. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a ventricular assist system provided in an embodiment of this application;

[0018] Figure 2 This is a schematic diagram of the structure of a ventricular assist device provided in an embodiment of this application;

[0019] Figure 3 This is a schematic diagram of a CAN driver chip provided in an embodiment of this application;

[0020] Figure 4 This is a schematic diagram of a first anti-interference circuit provided in an embodiment of this application;

[0021] Figure 5 This is a schematic diagram of a second anti-interference circuit provided in an embodiment of this application;

[0022] Figure 6 This is a schematic diagram of another ventricular assist system provided in an embodiment of this application. Detailed Implementation

[0023] To help those skilled in the art better understand the technical solutions of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the description of the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, software, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but also includes steps or units not listed, or other steps or units inherent to such processes, methods, products, or apparatus.

[0025] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0026] The ventricular assist system of this application can be an LVAD (left ventricular assist device), RVAD (right ventricular assist device), or BIVAD (biventricular assist device). These systems not only include a ventricular assist device implanted in the patient during operation, but also typically include a controller disposed outside the patient and connected to the ventricular assist device via a percutaneous wire (drive system). One part of the drive system extends outside the patient between the controller and the puncture site, while another part extends inside the patient between the puncture site and the ventricular assist device. The controller may, for example, include an integrated battery (rechargeable battery) or may be connected to a battery such that the implanted ventricular assist device can be powered by the controller via a line through the skin. The ventricular assist device typically includes a motor having a stator and a rotor having blades. The motor of the ventricular assist device can typically be driven by power supplied by the controller, for example, generating a current flow in the windings of the stator, which causes the rotor and its blades to rotate in order to deliver the patient's blood.

[0027] Please see Figure 1 , Figure 1A ventricular assist system 10 is provided as an embodiment of this application. The ventricular assist system 10 includes a ventricular assist device 100, a controller 200, and a percutaneous cable 300 for connecting the ventricular assist device 100 to the controller 200. The proximal end of the percutaneous cable 300 extends through the skin into the ventricular assist device 100 to transmit electrical power, as well as information and control signals, for the operation of the ventricular assist device 100.

[0028] The ventricular assist device 100 can be implanted in the body, for example, it can be attached to the heart via a ventricular connection component (such as a top ring, ventricular cuff, or ventricular linker), which can be sutured to the heart and connected to the ventricular assist device 100. The other end of the ventricular assist device 100 can be connected to the ascending aorta via an outlet tube and / or an artificial blood vessel connected to the outlet tube. This allows the ventricular assist device 100 to effectively transfer blood from the weakened ventricle and propel it into the aorta, thereby circulating it to the rest of the patient's vascular system and providing ventricular assist function to the patient.

[0029] The controller 200 is used to monitor the ventricular assist device 100, and can perform functions such as controlling and displaying data of the ventricular assist device 100, fault detection alarms, and data logging. For example, the controller 200 may have a touchscreen display for displaying operating data of the ventricular assist device 100, patient information, and information about the ventricular assist device 100. Furthermore, users can set the operating parameters of the ventricular assist device 100 through the controller 200.

[0030] Please see Figure 2 The ventricular assist device 100 includes a housing assembly with an inlet pipe and an impeller 120 disposed within the housing assembly for propelling fluid. The housing assembly includes a first housing and a second housing opposite to the first housing, which together form a chamber 110. The housing assembly also has a fluid inlet 114 and a fluid outlet 115 communicating with the chamber 110, with the fluid inlet 114 located on the first housing. The impeller 120 is capable of levitation and rotation within the chamber 110. The rotation of the impeller 120 generates centrifugal force to transport fluid, allowing fluid to enter the chamber 110 through the fluid inlet 114 and exit through the fluid outlet 115. The levitation and rotation of the impeller 120 means that the impeller 120 does not contact the chamber wall during rotation.

[0031] The ventricular assist device 100 also includes a motor 130 for driving the impeller 120 to levitate and rotate. The motor 130 includes a stator 131 and a rotor 132 located on opposite sides of the first housing. The stator 131 is fixed to the outer side of the first housing relative to the chamber 110, and the corresponding rotor 132 is located inside the chamber 110. Furthermore, the rotor 132 is fixedly connected to the impeller 120. When the stator 131 drives the rotor 132 to rotate within the chamber 110, the impeller 120 also rotates synchronously within the chamber 110 along with the rotor 132. The rotation of the impeller 120 can pressurize the fluid within the chamber 110, giving it greater pressure, thereby achieving the fluid pressurization effect of the ventricular assist device 100.

[0032] The ventricular assist device 100 also includes a control circuit 133, which monitors and controls the starting and subsequent operation of the motor 130, including performing three-phase field-oriented control (FOC) methods. The control circuit 133 can be a module independent of the stator 131 or integrated within the stator 131. Figure 2 In this embodiment, the control circuit 133 is an independent module. The control circuit 133 is electrically connected to the stator 131 and the percutaneous cable 130 extending into the ventricular assist device 100. The control circuit 133 controls the current flowing through the stator 131 based on information and / or control signals transmitted through the percutaneous cable 300, thereby controlling the power of the stator 131, i.e., controlling the magnetic force between the stator 131 and the rotor 132. Because the rotor 132 is fixedly connected to the impeller 120, the magnetic force control of the rotor 132 by the stator 131 can also control the rotational speed and levitation position of the impeller 120.

[0033] The control circuit 133 includes hardware and software for controlling various aspects of the operation of the motor 130. The control circuit 133 is coupled to the motor 130 via an interface to collect at least one piece of data from the motor 130. This at least one piece of data may include measured current flowing through the stator 131, data measured by sensors, motor speed, pressure difference across the pump, flow pulsation, fluid velocity, etc.

[0034] In one embodiment, the percutaneous cable 300 of this application includes only one CAN communication wire, which is used to transmit information and / or control signals between the controller 200 and the control circuit 133, wherein the controller 200 and the control circuit 133 use the CAN communication protocol to transmit data. The controller 200 and the ventricular assist device 100 can transmit power via a wireless power transmission coil (such as a resonant coil for wireless charging). For example, the controller 200 may include an external wireless power supply module, and the ventricular assist device 100 may include an internal wireless power supply module, through which the power supply voltage is transmitted to the internal wireless power supply module to achieve wireless power supply for the ventricular assist device 100. In this embodiment, by using only one CAN communication wire and wireless power supply, the diameter of the percutaneous cable 300 can be greatly reduced, lowering the risk of infection for the user.

[0035] In another embodiment, redundant communication is employed between the controller 200 and the ventricular assist device 100. This involves designing a main communication wire and redundant communication wires so that, in the event of a failure in the main communication wire, the redundant communication wires can continue transmitting information, ensuring continued communication between the controller 200 and the ventricular assist device 100. Specifically, the percutaneous cable 300 may include two communication wires. The CAN communication wire is the main communication wire. For example, the redundant communication wire can also be a communication wire using the CAN communication protocol. Power can also be transmitted between the controller 200 and the ventricular assist device 100 via a wireless power transmission coil (such as a resonant coil for wireless charging). Specific implementation details can be found in the above embodiment and will not be repeated here. It can be seen that this embodiment, by setting redundant communication wires and wireless charging, improves the safety and reliability of the ventricular assist device 100 while reducing the diameter of the percutaneous cable.

[0036] In another embodiment, the percutaneous cable 300 includes one CAN communication wire and two power supply wires. The CAN communication wire is used to transmit information and / or control signals between the controller 200 and the ventricular assist device 100, and the two power supply wires are used to provide power for the operation of the ventricular assist device 100. In this embodiment, using a single CAN communication wire and wired power supply wires effectively transmits power while reducing the diameter of the percutaneous cable 300.

[0037] In another embodiment, the percutaneous cable 300 includes two communication wires and two power supply wires. The two power supply wires provide power to the ventricular assist device 100. One of the two communication wires is a CAN communication wire, serving as the primary communication wire, while the other is a redundant communication wire used to continue transmitting information in the event of a failure of the primary communication wire, ensuring continued communication between the controller 200 and the ventricular assist device 100. In this embodiment, the use of redundant communication wires and wired power supply wires improves the safety and reliability of the ventricular assist device 100 while also effectively transmitting power.

[0038] In another embodiment, the percutaneous cable 300 includes two communication wires and four power supply wires. Two of the power supply wires are primary power supply wires; the other two are redundant power supply wires used in case of a failure of the primary power supply wires to ensure the normal operation of the ventricular assist device 100. One of the two communication wires is a CAN communication wire, serving as the primary communication wire, while the other is a redundant communication wire used to continue transmitting information in case of a failure of the primary communication wire, ensuring continued communication between the controller and the ventricular assist device 100. In this embodiment, the use of redundant communication wires and redundant power supply wires significantly improves the safety and reliability of the ventricular assist device 100.

[0039] In this application, the controller 200 also includes a communication circuit and a CAN driver chip. The communication circuit exchanges information with the control circuit within the ventricular assist device 100. The communication circuit provides control commands based on user settings to configure motor operating conditions, such as setting and changing the impeller speed. For example, the communication circuit can also perform diagnostic and analysis functions based on received operating conditions (such as the current flowing through the motor 120 and the actual impeller speed). The CAN driver chip outputs CAN signals according to commands from the communication circuit.

[0040] Please see Figure 3 , Figure 3 This is a schematic diagram of a CAN driver chip. The S pin of the CAN driver chip serves as the control terminal, used to receive control commands. When the communication circuit outputs a low-level drive signal, the CAN driver chip is enabled, thereby driving the CAN driver chip to output the CAN_H and CAN_L signals. The receive pin RXD and the transmit pin TXD of the CAN driver chip serve as input terminals, connected to the input signals respectively. The CANH pin of the CAN driver chip outputs the CAN_H signal, and the CANL pin outputs the CAN_L signal.

[0041] In this embodiment, the CANL pin of the CAN driver chip is connected to one end of the matching resistor R1 and one end of the adjustable resistor R2, respectively. The other end of the matching resistor R1 is connected to the CANH pin of the CAN driver chip, and the other end of the adjustable resistor R2 is grounded. In this embodiment, the CAN communication wire is connected to the CANH pin of the CAN driver chip, and information is transmitted using the CAN_H signal, while the CANL pin is grounded.

[0042] To reduce the number of communication wires, this application uses a single communication wire to transmit information and employs the CAN_H signal for communication. Specifically, the CAN communication wire is only connected to the CANH pin of the CAN driver chip, while the CANL pin of the CAN driver chip is grounded, thus carrying information via the CAN_H signal. Alternatively, this application can also use the CAN_L signal for communication, with the implementation method being the same as using the CAN_H signal, and will not be elaborated further here.

[0043] In this application, to increase the anti-interference capability of using a single CAN communication wire, the ventricular assist system is further provided with a first anti-interference circuit and a second anti-interference circuit. The first anti-interference circuit is located in the controller, and the second anti-interference circuit is located in the control circuit. The first anti-interference circuit and the second anti-interference circuit are connected in series with the CAN communication wire.

[0044] For example, when the sheathed cable 300 also includes a redundant communication wire connected in parallel with the CAN communication wire, the first anti-interference circuit and the second anti-interference circuit are also connected in series with the redundant communication wire to increase the anti-interference capability of the redundant communication wire.

[0045] Among them, such as Figure 4 As shown, the first anti-interference circuit includes a diode D1, a first capacitor C1, a first common-mode inductor CM1, a first ferrite bead L1, and a second capacitor C2. The anode of the diode D1 is connected to the CANH pin of the CAN driver chip, one end of the first capacitor C1, and the first output terminal of the first common-mode inductor CM1. The cathode of the diode D1, the other end of the first capacitor C1, and the second output terminal of the first common-mode inductor CM1 are all grounded. The output terminal of the first common-mode inductor CM1 is connected to one end of the second capacitor C2 and the CAN communication wire and / or the redundant communication wire. The other end of the second capacitor C2 is grounded.

[0046] The diode D1 is used for ESD interference suppression, and the first capacitor C1 is a filter capacitor. The first capacitor C1, the first common-mode inductor CM1, and the first ferrite bead L1 form a filter circuit. The parameters of the first capacitor C1, the first ferrite bead L1, and the first common-mode inductor CM1 are selected according to the environment in which the ventricular assist device 100 and the controller 200 are located, so that the first anti-interference circuit can fully or partially cover the frequency characteristic curve of interference signals that may be generated when the ventricular assist device 100 is used, thereby avoiding electrostatic interference and communication interference, and ensuring the normal operation of the ventricular assist device 100. The second capacitor C2 is used for electrostatic discharge protection.

[0047] For example, the circuit structure of the second anti-interference circuit is the same as that of the first anti-interference circuit. Figure 5 As shown, the second anti-interference circuit includes a diode D2, a third capacitor C3, a second common-mode inductor CM2, a second ferrite bead L2, and a fourth capacitor C4. The anode of the diode D2 is connected to the control circuit 133, one end of the third capacitor C3, and the first output terminal of the second common-mode inductor CM2. The cathode of the diode D2, the other end of the third capacitor C3, and the second output terminal of the second common-mode inductor CM2 are all grounded. The output terminal of the second common-mode inductor CM2 is connected to one end of the fourth capacitor C4 and the CAN communication wire and / or the redundant communication wire. The other end of the fourth capacitor C4 is grounded.

[0048] This application incorporates anti-interference circuits at both ends of the controller 200 and the control circuit 133. This allows for a reduction in the diameter of the sheathed cable 300 and an improvement in the anti-interference capability of the CAN communication cable when using a single CAN communication wire as the main communication wire. Furthermore, the distance between the ventricular assist device 100 and the controller 200 in this application is very small (e.g., 1-2 m), and the added first and second anti-interference circuits can meet the anti-interference requirements of the ventricular assist system.

[0049] Optionally, the capacitance value of the first capacitor is determined based on the impedance of the CAN communication wire and the control circuit, as well as the communication frequency between the controller and the control circuit.

[0050] To ensure that the first and second anti-interference circuits can fully cover the frequency band of the interference signal, the impedances of the first capacitor C1 and the third capacitor C3 are matched. That is, the union of the frequency characteristic curves of the first capacitor C1 and the third capacitor C3 can cover the frequency band of the interference signal. The interference signal in the sheathed cable 300 is mainly affected by the communication frequency between the controller 200 and the control circuit 133, the interference of components in the control circuit 133, and the CAN communication wires. Therefore, the capacitance values ​​of the first capacitor C1 and the third capacitor C3 are determined according to the impedance of the CAN communication wires and the control circuit 133, as well as the communication frequency between the controller 200 and the control circuit 133, so that the frequency characteristic curves of the first capacitor C1 and the third capacitor C3 can cover the frequency band of the interference signal.

[0051] Furthermore, the union of the frequency characteristic curves of the filter circuit composed of the first capacitor C1, the first common-mode inductor CM1, and the first ferrite bead L1 and the frequency characteristic curves of the filter circuit composed of the third capacitor C3, the second common-mode inductor CM2, and the second ferrite bead L2 can cover the frequency band of the interference signal. Specifically, the parameters of the first capacitor C1, the first common-mode inductor CM1, the first ferrite bead L1, the third capacitor C3, the second common-mode inductor CM2, and the second ferrite bead L2 are selected according to the impedance of the CAN communication wire and the control circuit 133, as well as the communication frequency between the controller 200 and the control circuit 133.

[0052] Please see Figure 6 , Figure 6 This is a schematic diagram of another ventricular assist system 20 provided in an embodiment of this application. The ventricular assist system 20 includes a left ventricular assist device 210, a right ventricular assist device 220, a controller 230, and a percutaneous cable 240. The left ventricular assist device 210 and the right ventricular assist device 220 are implanted in the body, while the controller 230 is disposed outside the body and connected to the left ventricular assist device 210 and the right ventricular assist device 220 via the percutaneous cable 240. The left ventricular assist device 210 has a first control circuit 211 controlling its operation, and the right ventricular assist device 220 has a second control circuit 221 controlling its operation. The distal end of the percutaneous cable 240 is connected to the controller 230, and the proximal end of the percutaneous cable 240 extends through the skin and connects to the first control circuit 211 and the second control circuit 221 to transmit power, information, and control signals for the operation of the left ventricular assist device 210 and the right ventricular assist device 220.

[0053] The structures of the left ventricular assist device 210 and the right ventricular assist device 220 can be referred to the above. Figure 2 This will not be elaborated upon here.

[0054] To reduce the risk of infection for patients, the percutaneous cable 240 includes a first portion 241, a plurality of second portions 242, and a connector 243. The first portion 241 is externally located for connecting the controller 230 to one end of the connector 243, and the other end of the connector 243 is connected to the plurality of second portions 242 located internally. The plurality of second portions 242 are respectively connected to a first control circuit 211 and a second control circuit 221, thereby branching the power and / or information from the controller 230 to the left ventricular assist device 210 and the right ventricular assist device 220.

[0055] The connector 243 can be located inside the body or outside the body; there is no limitation on this. Figure 6 The following explanation uses the example of placement within the body.

[0056] In one embodiment, the percutaneous cable 240 includes only one CAN communication wire for transmitting information and / or control signals. The transmitted information and / or control signals via connector 243 can be branched to a second portion 242 connected to the first control circuit and another second portion 242 connected to the second control circuit, thereby enabling communication between the controller 230 and the left ventricular assist device 210 and the right ventricular assist device 220. Power can be transmitted between the controller 230 and the left ventricular assist device 210 and the right ventricular assist device 220 via a wireless power transmission coil (such as a resonant coil for wireless charging). For example, the controller 230 may include an external wireless power supply module, and the left ventricular assist device 210 and / or the right ventricular assist device 220 may include an internal wireless power supply module, through which the power supply voltage is transmitted to the internal wireless power supply module to wirelessly power the left ventricular assist device 210 and the right ventricular assist device 220. In this embodiment, by using only one CAN communication wire and wireless power supply, the diameter of the sheath cable 240 can be greatly reduced, thus lowering the risk of infection for users.

[0057] In another embodiment, redundant communication is employed between the controller 230 and the left ventricular assist device 210 and the right ventricular assist device 220. This involves designing a main communication wire and redundant communication wires so that in the event of a failure in the main communication wire, the redundant communication wires can continue transmitting information, ensuring continued communication between the controller 230 and the left ventricular assist device 210 and the right ventricular assist device 220. Specifically, the percutaneous cable 240 may include two communication wires, with the CAN communication wire being the main communication wire. For example, the redundant communication wire can also be a communication wire using the CAN communication protocol. Power can also be transmitted between the controller 230 and the left ventricular assist device 210 and the right ventricular assist device 220 via a wireless power transmission coil (such as a resonant coil for wireless charging). Specific implementation details can be found in the above embodiment and will not be repeated here. It can be seen that this embodiment, by setting redundant communication wires and using wireless charging, improves the safety and reliability of the left ventricular assist device 210 and the right ventricular assist device 220 while reducing the diameter of the percutaneous cable 240.

[0058] In another embodiment, the percutaneous cable 240 includes one CAN communication wire and two power supply wires. The CAN communication wire is used to transmit information and / or control signals between the controller 230 and the left ventricular assist device 210 and the right ventricular assist device 220, and the two power supply wires are used to provide power for the operation of the left ventricular assist device 210 and the right ventricular assist device 220. In this embodiment, using a single CAN communication wire and wired power supply wires effectively transmits power while reducing the diameter of the percutaneous cable 240.

[0059] In another embodiment, the perforated cable 240 includes two communication wires and two power supply wires. The two power supply wires provide power to the left ventricular assist device 210 and the right ventricular assist device 220. One of the two communication wires is a CAN communication wire, serving as the primary communication wire, while the other is a redundant communication wire used to continue transmitting information in the event of a failure of the primary communication wire. In this embodiment, the use of redundant communication wires and wired power supply wires improves the safety and reliability of the left ventricular assist device 210 and the right ventricular assist device 220 while also effectively transmitting power.

[0060] In another embodiment, the percutaneous cable 240 includes two communication wires and four power supply wires. Two of the power supply wires are primary power supply wires; the other two are redundant power supply wires used in case of a failure of the primary power supply wires to ensure the normal operation of the left ventricular assist device 210 and the right ventricular assist device 220. One of the two communication wires is a CAN communication wire, which serves as the primary communication wire, while the other is a redundant communication wire used to continue transmitting information in case of a failure of the primary communication wire. In this embodiment, the use of redundant communication wires and redundant power supply wires significantly improves the safety and reliability of the left ventricular assist device 210 and the right ventricular assist device 220.

[0061] It should be noted that the controller 230 in this embodiment of the application and Figure 1 The controller 200 is the same as that in the previous one, and the communication method between the controller 230 and the left ventricular assist device 210 and the right ventricular assist device 220 is also the same. Figure 1 The communication method between the controller 200 and the ventricular assist device 100 is the same, that is, the CAN driver chip, the first anti-interference circuit and the second anti-interference circuit in the controller 200 are the same as those described above, and will not be repeated here.

[0062] Furthermore, unless otherwise stated, the ordinal numbers such as "first" and "second" mentioned in the embodiments of this application are used to distinguish multiple objects and are not used to limit the order, timing, priority, or importance of multiple objects. For example, "first information" and "second information" are only used to distinguish different information and do not indicate differences in the content, priority, sending order, or importance of these two types of information.

[0063] This application also provides a medical device, wherein the medical device includes the ventricular assist system 10 or ventricular assist system 20 described above.

[0064] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0065] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0066] In the several embodiments provided in this application, it should be understood that the disclosed apparatus can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of the units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical or other forms.

[0067] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of the embodiments of this application, depending on actual needs.

[0068] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0069] If the aforementioned integrated units are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage device (CMD). Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a memory and includes several instructions to cause a computer device (which may be a personal computer, server, or TRP, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned memory includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0070] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage device, which may include a flash drive, ROM, RAM, disk, or optical disk, etc.

[0071] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A ventricular assist system, characterized in that, The ventricular assist system includes: A ventricular assist device, comprising a control circuit for controlling the operation of the ventricular assist device; The controller is used to set and display the operating parameters of the ventricular assist device; A sheathed cable is used to connect the controller to the control circuit, the sheathed cable including a CAN communication wire, a single CAN communication wire being used to transmit information and / or control signals between the controller and the control circuit.

2. The ventricular assist system according to claim 1, characterized in that, The ventricular assist system further includes a first anti-interference circuit and a second anti-interference circuit. The first anti-interference circuit is disposed in the controller, and the second anti-interference circuit is disposed in the control circuit. The first anti-interference circuit and the second anti-interference circuit are connected in series with the CAN communication wire.

3. The ventricular assist system according to claim 2, characterized in that, The controller also includes a CAN driver chip; The CANL pin of the CAN driver chip is connected to one end of the matching resistor and one end of the adjustable resistor, respectively. The other end of the matching resistor is connected to the CANH pin of the CAN driver chip, and the other end of the adjustable resistor is grounded. The CANH pin of the CAN driver chip is connected to the CAN communication wire and is used to output CAN signals to the CAN communication wire.

4. The ventricular assist system according to claim 3, characterized in that, The first anti-interference circuit includes a diode, a first capacitor, a first common-mode inductor, a first ferrite bead, and a second capacitor; The anode of the diode is connected to the output terminal of the CAN driver chip, one end of the first capacitor, and the first output terminal of the first common-mode inductor. The cathode of the diode, the other end of the first capacitor, and the second output terminal of the first common-mode inductor are all grounded. The output terminal of the first common-mode inductor is connected to one end of the second capacitor and the CAN communication wire. The other end of the second capacitor is grounded.

5. The ventricular assist system according to any one of claims 2-4, characterized in that, The circuit structure of the second anti-interference circuit is the same as that of the first anti-interference circuit.

6. The ventricular assist system according to claim 4, characterized in that, The capacitance value of the first capacitor is determined based on the impedance of the CAN communication wire and the control circuit, as well as the communication frequency between the controller and the control circuit.

7. The ventricular assist system according to any one of claims 1-4, characterized in that, The sheathed cable also includes a redundant communication wire, which is connected in parallel with the CAN communication wire.

8. The ventricular assist system according to any one of claims 1-4, characterized in that, The sheathed cable also includes two power supply wires for transmitting power from the controller to the control circuit and the motor.

9. A ventricular assist system, characterized in that, The ventricular assist system includes: A left ventricular assist device, having a first control circuit for controlling the operation of the left ventricular assist device; A right ventricular assist device, having a second control circuit for controlling the operation of the right ventricular assist device; The controller is used to set and display the operating parameters of the left ventricular assist device and the right ventricular assist device; A sheathed cable is used to connect the controller to the first control circuit and the second control circuit respectively. The sheathed cable includes a CAN communication wire, and a single CAN communication wire is used to transmit information and / or control signals.

10. A medical device, characterized in that, The medical device includes the ventricular assist system as described in any one of claims 1-8 or claim 9.

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