Flushing system of ventricular assist device

Abstract

The embodiment of the utility model provides a flushing system of a ventricular assist device, and relates to the technical field of medical instruments, the flushing system comprises a flushing control device and a flushing device, the flushing equipment comprises a flushing pressure detection module, a flushing cavity detection module, a radio frequency identification (RFID) module, a bubble detection module, a flushing driving motor and a motor position detection module; the flushing control equipment comprises an acquisition module, a communication module, a processing module, an alarm module, a control module and a driving module; by applying the scheme provided by the embodiment, effective and stable flushing control can be realized.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a flushing system for a ventricular catheter pump. Background Technology

[0002] A ventricular assist device is a device that provides support or assistance to patients with heart-related diseases, such as heart failure, to help the heart pump blood to other parts of the body.

[0003] The ventricular assist device (VAP) is also connected to a flushing system. This system injects flushing fluid around the drive components of the VAP, using the flushing pressure to counteract the pressure of blood entering the drive components, thus preventing blood from entering and causing subsequent medical accidents such as thrombosis and pump failure. Currently, achieving effective and stable flushing control is a pressing issue that needs to be addressed. Summary of the Invention

[0004] The purpose of this application is to provide a flushing system for a ventricular assist device to achieve effective and stable flushing control. The specific technical solution is as follows:

[0005] In a first aspect, embodiments of this application provide a flushing system for a ventricular assist device. The flushing system includes a flushing control device and a flushing device. The flushing device includes a flushing pressure detection module, a flushing chamber detection module, an RFID module, a bubble detection module, a flushing drive motor, and a motor position detection module. The flushing control device includes a data acquisition module, a communication module, a processing module, an alarm module, a control module, and a drive module. Wherein:

[0006] The flushing pressure detection module is used to detect the flushing pressure of the flushing fluid injected into the ventricular catheter pump by the flushing device; the flushing chamber detection module is used to detect the installation position of the flushing chamber used for injecting the flushing fluid in the flushing device; the bubble detection module is used to detect bubbles in the flushing pipeline of the flushing device; the RFID module is used to detect the device serial number of the flushing device; the flushing drive motor is used to drive the operation of the flushing device; and the motor position detection module is used to detect the stepping position of the flushing drive motor.

[0007] The output terminals of the flushing pressure detection module, the flushing chamber detection module, and the bubble detection module are respectively connected to the input terminal of the acquisition module; the output terminal of the RFID module is connected to the input terminal of the communication module.

[0008] The input terminal of the motor position detection module is connected to the flushing drive motor, and the output terminal is connected to the input terminal of the control module; the output terminal of the control module is connected to the input terminal of the drive module; the output terminal of the drive module is connected to the flushing drive motor.

[0009] The input terminal of the processing module is connected to the output terminal of the acquisition module and the output terminal of the communication module, and the output terminal is connected to the input terminal of the control module and the input terminal of the alarm module.

[0010] The processing module is used to process the data acquired by the acquisition module and the communication module according to the calculation and processing method corresponding to the current rinsing stage, generate processing instructions, and send the processing instructions to the module associated with the processing instructions; the control module is used to receive the motor control instructions sent by the processing module, determine the control parameters of the rinsing drive motor based on the rinsing pressure contained in the motor control instructions and the motor position detected by the motor position detection module, and control the operation of the rinsing drive motor through the drive module according to the control parameters.

[0011] In one embodiment of this application, when the current rinsing stage is the equipment installation preparation stage before rinsing, the working modules corresponding to the equipment installation preparation stage before rinsing include: a rinsing chamber detection module, an RFID module, a data acquisition module, a communication module, a processing module, and an alarm module, wherein:

[0012] The processing module includes a data acquisition submodule, a data judgment submodule, a first instruction sending module, and a second instruction sending module. The input terminal of the data acquisition submodule is connected to the output terminal of the acquisition module and the output terminal of the RFID module; its output terminal is connected to the input terminal of the data judgment submodule. The output terminal of the data judgment submodule is connected to the input terminal of the first instruction sending module and the output terminal of the second instruction sending module, respectively. The output terminal of the first instruction sending module is connected to the input terminal of the control module, and the output terminal of the second instruction sending module is connected to the input terminal of the alarm module. Wherein:

[0013] The data acquisition submodule is used to acquire the installation position of the flushing chamber detected by the flushing chamber detection module through the acquisition module, and to acquire the device serial number detected by the RFID module through the communication module;

[0014] The data judgment submodule is used to determine whether the installation location is a preset installation location and whether the device serial number is a preset serial number; if both are true, the first instruction sending module is triggered; if at least one is false, the second instruction sending module is triggered.

[0015] The first instruction sending module is used to send a motor start instruction to the control module;

[0016] The second instruction sending module is used to send alarm instructions to the alarm module.

[0017] In one embodiment of this application, when the current rinsing stage is a pre-rinsing stage, the working module corresponding to the pre-rinsing stage includes: a rinsing drive motor, a processing module, a control module, and a drive module; the processing module is specifically used to send a first motor drive command corresponding to the pre-rinsing stage to the control module; the control module is specifically used to control the rinsing drive motor to run according to the first motor drive command through the drive module, so that the rinsing drive motor maintains a preset operating state.

[0018] In one embodiment of this application, when the current rinsing stage is a standard rinsing stage, the working module corresponding to the standard rinsing stage includes: a rinsing drive motor, a motor position detection module, a processing module, a control module, a drive module, a rinsing pressure detection module, and a data acquisition module; the processing module is specifically used to send a second motor drive command corresponding to the standard rinsing stage to the control module; the control module is specifically used to control the rinsing drive motor through the drive module according to the second motor drive command and using a preset closed-loop feedback control method.

[0019] In one embodiment of this application, the communication module includes: an electrostatic discharge protection component, a resistor matching circuit, and a dual-channel drive transceiver, wherein:

[0020] The input terminal of the electrostatic discharge protection component is connected to the output terminal of the RFID module, and the output terminal is connected to the input terminal of the resistor matching circuit; the output terminal of the resistor matching circuit is connected to the input terminal of the dual-channel drive transceiver; the output terminal of the dual-channel drive transceiver is connected to the input terminal of the control module.

[0021] The resistor matching circuit includes a first resistor R1 and a second resistor R2, wherein one end of the first resistor R1 is connected to the first output terminal of the electrostatic protection component and the other end is connected to the T1OUT interface of the dual-channel drive transceiver; one end of the second resistor R2 is connected to the second output terminal of the electrostatic protection component and the other end is connected to the R1IN interface of the dual-channel drive transceiver.

[0022] The dual-channel driver transceiver includes a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, and a driver transceiver chip U1. Specifically: one end of the first capacitor C1 is connected to the C1+ interface of the driver transceiver chip U1, and the other end is connected to the C1- interface of the driver transceiver chip U1; one end of the second capacitor C2 is connected to the V+ interface of the driver transceiver chip U1, and the other end is grounded; one end of the third capacitor C3 is connected to the C2+ interface of the driver transceiver chip U1, and the other end is connected to the C2- interface of the driver transceiver chip U1; one end of the fourth capacitor C4 is connected to the V- interface of the driver transceiver chip U1, and the other end is grounded; the output terminal of the driver transceiver chip U1 is connected to the processing module.

[0023] In one embodiment of this application, the drive module includes a drive chip and a drive circuit. The input terminal of the drive chip is connected to the output terminal of the control module, and the output terminal is connected to the input terminal of the drive circuit. The output terminal of the drive circuit is connected to the input terminal of the flushing drive motor.

[0024] The driving circuit includes an A-phase coil H-bridge driving circuit, a B-phase coil H-bridge driving circuit, a first current sampling and filtering circuit, and a second current sampling and filtering circuit. The input terminal of the A-phase coil H-bridge driving circuit is connected to the first output terminal of the driving chip and one end of the first current sampling and filtering circuit, respectively, and its output terminal is connected to the A-phase coil of the flushing driving motor. The other end of the first current sampling and filtering circuit is connected to the first input terminal of the driving chip. The input terminal of the B-phase coil H-bridge driving circuit is connected to the second output terminal of the driving chip and one end of the second current sampling and filtering circuit, respectively, and its output terminal is connected to the B-phase coil of the flushing driving motor. The other end of the second current sampling and filtering circuit is connected to the second input terminal of the driving chip.

[0025] As can be seen from the above, the system provided in this application includes a rinsing control device and a rinsing device. The rinsing device integrates multiple detection modules, including a rinsing pressure detection module, a rinsing chamber detection module, a bubble detection module, an RFID module, and a motor position detection module. The data detected by these detection modules is output to the rinsing control device. The processing module in the rinsing control device processes the acquired data and generates corresponding processing instructions. Upon receiving the motor control instructions from the processing module, the control module determines the control parameters of the rinsing drive motor based on the rinsing pressure and motor position, and then controls the operation of the rinsing drive motor through the drive module. It can be seen that through the functions and connections of the various modules in the above system, effective and stable rinsing control can be achieved.

[0026] Of course, implementing any product or method of this application does not necessarily require achieving all of the advantages described above at the same time. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other embodiments can be obtained based on these drawings.

[0028] Figure 1 This is a structural diagram illustrating an application scenario provided in an embodiment of this application.

[0029] Figure 2 A schematic diagram of the flushing system of a ventricular assist device provided in this application embodiment;

[0030] Figure 3 This is a schematic diagram of the structure of a communication module provided in an embodiment of this application;

[0031] Figure 4 This is a schematic diagram of the structure of a driver module provided in an embodiment of this application. Detailed Implementation

[0032] The technical solutions of 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 embodiments of this application, all other embodiments obtained by those skilled in the art based on this application are within the scope of protection of this application.

[0033] Before introducing the embodiments of this application, firstly, in conjunction with Figure 1 The application scenarios of this application are explained.

[0034] Figure 1 The device includes a ventricular assist device 101 and a flushing system 102. The flushing system 102 includes a flushing control device 1021 and a flushing device 1022. The flushing control device 1021 is connected to the flushing device 1022, and the flushing device 1022 is connected to the ventricular assist device 101 through a flushing pipeline.

[0035] The ventricular assist device 101 is a device used to assist a patient's heart in pumping blood. The ventricular assist device 101 rotates at high speed to assist the pumping of blood from the ventricles into the arteries. The ventricular assist device 101 can be a left ventricular catheter pump or a right ventricular catheter pump.

[0036] When the ventricular assist device 101 is in operation within the patient, blood may enter the drive components of the ventricular assist device 101, such as the motor, potentially leading to a series of medical safety incidents such as thrombosis and pump malfunction. To prevent such incidents, a flushing system 102 generates a flushing fluid outside the drive components that flows in the opposite direction to the blood flow, and the flushing fluid pressure is greater than the blood pressure, thereby preventing blood from flowing into the drive components.

[0037] The embodiments of this application are described in detail below.

[0038] See Figure 2 , Figure 2 This is a schematic diagram of the flushing system for a ventricular assist device provided in an embodiment of this application. The flushing system includes a flushing control device 201 and a flushing device 202.

[0039] The rinsing equipment 202 includes a rinsing pressure detection module 2021, a rinsing chamber detection module 2022, an RFID module 2023, a bubble detection module 2024, a rinsing drive motor 2025, and a motor position detection module 2026; the rinsing control equipment 201 includes a data acquisition module 2011, a communication module 2012, a processing module 2013, an alarm module 2014, a control module 2015, and a drive module 2016. The connection relationships between the modules are as follows:

[0040] 1. The output terminals of the flushing pressure detection module 2021, the flushing chamber detection module 2022, and the bubble detection module 2024 are respectively connected to the input terminal of the acquisition module 2011.

[0041] Specifically: the flushing pressure detection module 2021 is used to detect the flushing pressure of the flushing fluid injected into the ventricular catheter pump by the flushing equipment; the flushing chamber detection module 2022 is used to detect the installation position of the flushing chamber used for injecting the flushing fluid in the flushing equipment; and the bubble detection module 2024 is used to detect bubbles in the flushing pipeline of the flushing equipment. Therefore, the flushing pressure output by the flushing pressure detection module 2021, the installation position output by the flushing chamber detection module 2022, and the bubble information output by the bubble detection module 2023 are all input into the acquisition module 2011.

[0042] The acquisition module 2011 may include multiple acquisition circuits, such as a pressure acquisition circuit, a position acquisition circuit, and a bubble detection circuit. The pressure acquisition circuit is used to acquire the flushing pressure detected by the flushing pressure detection module 2021, the position acquisition circuit is used to acquire the position information detected by the flushing chamber detection module 2022, and the bubble detection circuit is used to acquire the bubble information detected by the bubble detection module 2024.

[0043] 2. The output of the RFID (Radio Frequency Identification) module 2023 is connected to the input of the communication module 2012.

[0044] The RFID module 2023 is used to detect the device serial number of the rinsing equipment, which represents the equipment identification information of the rinsing equipment. The communication module 2012 is used to acquire the data identified by the RFID module 2023.

[0045] 3. The input terminal of the motor position detection module 2026 is connected to the flushing drive motor 2025, and the output terminal is connected to the input terminal of the control module 2015.

[0046] The motor position detection module 2026 is used to detect the stepping position of the flushing drive motor 2025, and the motor position detection module 2026 outputs the detected motor position to the control module 2015.

[0047] The aforementioned flushing drive motor 2025 is used to drive the operation of the flushing equipment. The stepping position of the flushing drive motor 2025 can be understood as follows: the drive component in the flushing drive motor 2025 realizes the operation of the motor by moving forward / backward, and the stepping position refers to the current position of the drive component during the forward / backward process.

[0048] 4. In addition to being connected to the motor position detection module 2026 mentioned above, the input terminal of the control module 2015 is also connected to the output terminal of the processing module 2013. Furthermore, the output terminal of the control module 2015 is connected to the input terminal of the drive module 2016, and the output terminal of the drive module 2016 is connected to the flushing drive motor 2025.

[0049] The control module 2015 is used to receive the motor control command sent by the processing module 2013, determine the control parameters of the flushing drive motor 2025 based on the flushing pressure contained in the motor control command and the motor position detected by the motor position detection module 2026, and control the operation of the flushing drive motor through the drive module.

[0050] In this embodiment, a pre-set correspondence between a preset flushing pressure, a preset motor position, and control parameters can be established. Based on this correspondence, the control module 2015 can determine the control parameters corresponding to the current flushing pressure and motor position, and use them as control parameters for controlling the flushing drive motor. Then, the drive module controls the operation of the flushing drive motor according to the control parameters.

[0051] The aforementioned control module can be a motor control chip, and the aforementioned drive module can be a drive circuit.

[0052] 5. The input terminal of the processing module 2013 is connected to the output terminal of the acquisition module 2011 and the output terminal of the communication module 2012, and the output terminal is connected to the input terminal of the control module 2015 and the input terminal of the alarm module 2014.

[0053] The processing module 2013 is used to process the data acquired by the acquisition module 2011 and the communication module 2012 according to the calculation and processing method corresponding to the current rinsing stage, generate processing instructions, and send the processing instructions to the module associated with the processing instructions. The above processing module can be an MCU (Microcontroller Unit).

[0054] In this embodiment, the calculation and processing methods corresponding to each rinsing stage can be preset, and the processing module 2013 determines the corresponding calculation and processing method according to the current rinsing stage.

[0055] The processing instruction can be a motor drive instruction, and the module associated with the motor drive instruction is the control module 2015. Therefore, a motor drive instruction is sent to the control module 2015. The processing instruction can also be an alarm instruction, and the module associated with the alarm instruction is the alarm module 2014. Therefore, an alarm instruction is sent to the alarm module 2014.

[0056] As can be seen from the above, the system provided in this embodiment includes a rinsing control device and a rinsing device. The rinsing device integrates multiple detection modules, including a rinsing pressure detection module, a rinsing chamber detection module, a bubble detection module, an RFID module, and a motor position detection module. The data detected by these detection modules is output to the rinsing control device. The processing module in the rinsing control device processes the acquired data and generates corresponding processing instructions. Upon receiving the motor control instructions from the processing module, the control module determines the control parameters of the rinsing drive motor based on the rinsing pressure and motor position, and then controls the operation of the rinsing drive motor through the drive module. It can be seen that through the functions and connections of the various modules in the above system, effective and stable rinsing control can be achieved.

[0057] In the foregoing Figure 2In the corresponding embodiment, the processing module generates corresponding processing instructions based on the current flushing stage. In this embodiment, the current flushing stage includes a pre-flushing equipment installation and preparation stage, a pre-flushing stage, and a standard flushing stage. Specifically: the pre-flushing equipment installation and preparation stage refers to the installation of various components in the flushing equipment before flushing, such as installing the flushing chamber and connecting the flushing pipeline; the pre-flushing stage is the stage where abnormalities in the flushing pipeline are checked before the standard flushing stage, preparing for the standard flushing stage. In this stage, a rapid flushing method can be used to eliminate abnormalities such as air bubbles and impurities in the flushing pipeline; the standard flushing stage is the stage where flushing fluid is injected around the drive components of the ventricular assist device after the flushing equipment is connected to the ventricular assist device. Before the standard flushing stage, the flushing equipment and the ventricular assist device are not connected.

[0058] The data required for different rinsing stages are different, and therefore the corresponding working modules are also different. The following three embodiments illustrate the functions of the working modules and processing modules corresponding to the three rinsing stages.

[0059] The current flushing stage is the equipment installation preparation stage before flushing. The corresponding working modules for the equipment installation preparation stage before flushing include: flushing chamber detection module, RFID module, data acquisition module, communication module, processing module, and alarm module.

[0060] The processing module includes a data acquisition submodule, a data judgment submodule, a first command sending module, and a second command sending module; wherein, the input end of the data acquisition submodule is connected to the output end of the acquisition module and the output end of the RFID module, and the output end is connected to the input end of the data judgment submodule; the output end of the data judgment submodule is connected to the input end of the first command sending module and the output end of the second command sending module respectively; the output end of the first command sending module is connected to the input end of the control module; and the output end of the second command sending module is connected to the input end of the alarm module.

[0061] The data acquisition submodule is used to acquire the installation position of the flushing chamber detected by the flushing chamber detection module through the acquisition module, and to acquire the equipment serial number detected by the RFID module through the communication module.

[0062] The data judgment submodule is used to determine whether the installation location is the preset installation location and whether the device serial number is the preset serial number; if both are true, the first instruction sending module is triggered; if at least one is false, the second instruction sending module is triggered.

[0063] The first instruction sending module is used to send motor start instructions to the control module.

[0064] The above motor start command indicates that the flushing drive motor can be started and run.

[0065] The second instruction sending module is used to send alarm instructions to the alarm module.

[0066] When the current rinsing stage is the pre-rinsing stage, the working modules corresponding to the pre-rinsing stage include: a rinsing drive motor, a processing module, a control module, and a drive module; the processing module is specifically used to send the first motor drive command corresponding to the pre-rinsing stage to the control module; the control module is specifically used to control the operation of the rinsing drive motor through the drive module according to the first motor drive command, so that the rinsing drive motor maintains the preset operating state.

[0067] When the current rinsing stage is the standard rinsing stage, the working modules corresponding to the standard rinsing stage include: a rinsing drive motor, a motor position detection module, a processing module, a control module, a drive module, a rinsing pressure detection module, and a data acquisition module; the processing module is specifically used to send the second motor drive command corresponding to the standard rinsing stage to the control module; the control module is specifically used to control the rinsing drive motor through the drive module according to the second motor drive command and using a preset closed-loop feedback control method.

[0068] In the foregoing Figure 2 In a corresponding embodiment, the communication module may include the electrostatic discharge protection circuit 301, the resistor matching circuit 302, and the dual-channel drive transceiver 303. Based on this, see [reference needed]. Figure 3 , Figure 3 This is a schematic diagram of the structure of a communication module provided in an embodiment of this application.

[0069] The input terminal of the electrostatic discharge protection component 301 is connected to the output terminal of the RFID module, and the output terminal is connected to the input terminal of the resistor matching circuit 302; the output terminal of the resistor matching circuit 302 is connected to the input terminal of the dual-channel drive transceiver 303; the output terminal of the dual-channel drive transceiver 303 is connected to the input terminal of the control module.

[0070] Electrostatic discharge (ESD) protection components can be ESD (Electro-Static Discharge) protection components;

[0071] The resistor matching circuit includes a first resistor R1 and a second resistor R2, wherein one end of the first resistor R1 is connected to the first output terminal of the electrostatic protection component and the other end is connected to the T1OUT interface of the dual-channel drive transceiver.

[0072] One end of the second resistor R2 is connected to the second output terminal of the electrostatic protection component, and the other end is connected to the R1IN interface of the dual-channel drive transceiver.

[0073] The dual-channel driver transceiver includes a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, and a driver transceiver chip U1. Specifically: one end of the first capacitor C1 is connected to the C1+ interface of the driver transceiver chip U1, and the other end is connected to the C1- interface of the driver transceiver chip U1; one end of the second capacitor C2 is connected to the V+ interface of the driver transceiver chip U1, and the other end is grounded; one end of the third capacitor C3 is connected to the C2+ interface of the driver transceiver chip U1, and the other end is connected to the C2- interface of the driver transceiver chip U1; one end of the fourth capacitor C4 is connected to the V- interface of the driver transceiver chip U1, and the other end is grounded; the output terminal of the driver transceiver chip U1 is connected to the processing module.

[0074] In the foregoing Figure 2 In the corresponding embodiment, the driving module can drive chip 401 and driving circuit 402. The input terminal of the driving chip 401 is connected to the output terminal of the control module, and the output terminal is connected to the input terminal of the driving circuit 402. The output terminal of the driving circuit 402 is connected to the input terminal of the flushing driving motor.

[0075] The drive circuit 402 includes an A-phase coil H-bridge drive circuit 4021, a B-phase coil H-bridge drive circuit 4023, a first current sampling and filtering circuit 4022, and a second current sampling and filtering circuit 4024. The input terminal of the A-phase coil H-bridge drive circuit 4021 is connected to the first output terminal of the drive chip and one end of the first current sampling and filtering circuit 4022, respectively, and its output terminal is connected to the A-phase coil of the flushing drive motor. The other end of the first current sampling and filtering circuit 4022 is connected to the first input terminal of the drive chip. The input terminal of the B-phase coil H-bridge drive circuit 4023 is connected to the second output terminal of the drive chip and one end of the second current sampling and filtering circuit 4024, respectively, and its output terminal is connected to the B-phase coil of the flushing drive motor. The other end of the second current sampling and filtering circuit 4024 is connected to the second input terminal of the drive chip.

[0076] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially as a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid state disk (SSD)).

[0077] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0078] The various embodiments in this specification are described in a related manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. The above descriptions are merely preferred embodiments of this application and are not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.

Claims

1. A flushing system for a ventricular assist device, characterized in that, The rinsing system includes a rinsing control device and a rinsing device. The rinsing device includes a rinsing pressure detection module, a rinsing chamber detection module, an RFID module, a bubble detection module, a rinsing drive motor, and a motor position detection module. The rinsing control device includes a data acquisition module, a communication module, a processing module, an alarm module, a control module, and a drive module. The flushing pressure detection module is used to detect the flushing pressure of the flushing fluid injected into the ventricular catheter pump by the flushing device; the flushing chamber detection module is used to detect the installation position of the flushing chamber used for injecting the flushing fluid in the flushing device; the bubble detection module is used to detect bubbles in the flushing pipeline of the flushing device; the RFID module is used to detect the device serial number of the flushing device; the flushing drive motor is used to drive the operation of the flushing device; and the motor position detection module is used to detect the stepping position of the flushing drive motor. The output terminals of the flushing pressure detection module, the flushing chamber detection module, and the bubble detection module are respectively connected to the input terminal of the acquisition module; the output terminal of the RFID module is connected to the input terminal of the communication module. The input terminal of the motor position detection module is connected to the flushing drive motor, and the output terminal is connected to the input terminal of the control module; the output terminal of the control module is connected to the input terminal of the drive module; the output terminal of the drive module is connected to the flushing drive motor. The input terminal of the processing module is connected to the output terminal of the acquisition module and the output terminal of the communication module, and the output terminal is connected to the input terminal of the control module and the input terminal of the alarm module. The processing module is used to process the data acquired by the acquisition module and the communication module according to the calculation and processing method corresponding to the current rinsing stage, generate processing instructions, and send the processing instructions to the module associated with the processing instructions; the control module is used to receive the motor control instructions sent by the processing module, determine the control parameters of the rinsing drive motor based on the rinsing pressure contained in the motor control instructions and the motor position detected by the motor position detection module, and control the operation of the rinsing drive motor through the drive module according to the control parameters.

2. The system according to claim 1, characterized in that, When the current rinsing stage is the equipment installation preparation stage before rinsing, the corresponding working modules for the equipment installation preparation stage before rinsing include: a rinsing chamber detection module, an RFID module, a data acquisition module, a communication module, a processing module, and an alarm module, wherein: The processing module includes a data acquisition submodule, a data judgment submodule, a first instruction sending module, and a second instruction sending module. The input terminal of the data acquisition submodule is connected to the output terminal of the acquisition module and the output terminal of the RFID module; its output terminal is connected to the input terminal of the data judgment submodule. The output terminal of the data judgment submodule is connected to the input terminal of the first instruction sending module and the output terminal of the second instruction sending module, respectively. The output terminal of the first instruction sending module is connected to the input terminal of the control module, and the output terminal of the second instruction sending module is connected to the input terminal of the alarm module. Wherein: The data acquisition submodule is used to acquire the installation position of the flushing chamber detected by the flushing chamber detection module through the acquisition module, and to acquire the device serial number detected by the RFID module through the communication module; The data judgment submodule is used to determine whether the installation location is a preset installation location and whether the device serial number is a preset serial number; if both are true, the first instruction sending module is triggered; if at least one is false, the second instruction sending module is triggered. The first instruction sending module is used to send a motor start instruction to the control module; The second instruction sending module is used to send alarm instructions to the alarm module.

3. The system according to claim 1, characterized in that, When the current rinsing stage is the pre-rinsing stage, the working module corresponding to the pre-rinsing stage includes: a rinsing drive motor, a processing module, a control module, and a drive module; the processing module is specifically used to send a first motor drive command corresponding to the pre-rinsing stage to the control module; the control module is specifically used to control the operation of the rinsing drive motor through the drive module according to the first motor drive command, so that the rinsing drive motor maintains a preset operating state.

4. The system according to claim 1, characterized in that, When the current rinsing stage is the standard rinsing stage, the working modules corresponding to the standard rinsing stage include: a rinsing drive motor, a motor position detection module, a processing module, a control module, a drive module, a rinsing pressure detection module, and a data acquisition module; the processing module is specifically used to send a second motor drive command corresponding to the standard rinsing stage to the control module; the control module is specifically used to control the rinsing drive motor through the drive module according to the second motor drive command and using a preset closed-loop feedback control method.

5. The system according to any one of claims 1-4, characterized in that, The communication module includes: an electrostatic discharge protection component, a resistor matching circuit, and a dual-channel drive transceiver, wherein: The input terminal of the electrostatic discharge protection component is connected to the output terminal of the RFID module, and the output terminal is connected to the input terminal of the resistor matching circuit; the output terminal of the resistor matching circuit is connected to the input terminal of the dual-channel drive transceiver; the output terminal of the dual-channel drive transceiver is connected to the input terminal of the control module. The resistor matching circuit includes a first resistor R1 and a second resistor R2, wherein one end of the first resistor R1 is connected to the first output terminal of the electrostatic protection component and the other end is connected to the T1OUT interface of the dual-channel drive transceiver; one end of the second resistor R2 is connected to the second output terminal of the electrostatic protection component and the other end is connected to the R1IN interface of the dual-channel drive transceiver. The dual-channel driver transceiver includes a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, and a driver transceiver chip U1. Specifically: one end of the first capacitor C1 is connected to the C1+ interface of the driver transceiver chip U1, and the other end is connected to the C1- interface of the driver transceiver chip U1; one end of the second capacitor C2 is connected to the V+ interface of the driver transceiver chip U1, and the other end is grounded; one end of the third capacitor C3 is connected to the C2+ interface of the driver transceiver chip U1, and the other end is connected to the C2- interface of the driver transceiver chip U1; one end of the fourth capacitor C4 is connected to the V- interface of the driver transceiver chip U1, and the other end is grounded; the output terminal of the driver transceiver chip U1 is connected to the processing module.

6. The system according to any one of claims 1-4, characterized in that, The drive module includes a drive chip and a drive circuit. The input terminal of the drive chip is connected to the output terminal of the control module, and the output terminal is connected to the input terminal of the drive circuit. The output terminal of the drive circuit is connected to the input terminal of the flushing drive motor. The driving circuit includes an A-phase coil H-bridge driving circuit, a B-phase coil H-bridge driving circuit, a first current sampling and filtering circuit, and a second current sampling and filtering circuit. The input terminal of the A-phase coil H-bridge driving circuit is connected to the first output terminal of the driving chip and one end of the first current sampling and filtering circuit, respectively, and its output terminal is connected to the A-phase coil of the flushing driving motor. The other end of the first current sampling and filtering circuit is connected to the first input terminal of the driving chip. The input terminal of the B-phase coil H-bridge driving circuit is connected to the second output terminal of the driving chip and one end of the second current sampling and filtering circuit, respectively, and its output terminal is connected to the B-phase coil of the flushing driving motor. The other end of the second current sampling and filtering circuit is connected to the second input terminal of the driving chip.

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