CN118615576A - Interventional pump braking control method, device, equipment and ventricular assist device - Google Patents

Abstract

The present application relates to an interventional pump braking control method, device, equipment and ventricular assist device, and specifically to the field of medical device technology. The method is applied to a ventricular assist device, which includes a power supply module, a drive motor, an interventional pump and a flushing pump; the method includes: in response to emergency braking instruction information for the interventional pump, braking the drive motor, and updating the target control parameter of the flushing pump to a first target data; the first target data is used to indicate that the flushing pump consumes the induced current generated by the drive motor; during the emergency braking stage of the interventional pump, the flushing pump is driven to work based on the first target data and the induced current. The above scheme enables the electric energy generated by electromagnetic induction during the emergency braking of the interventional pump to be quickly consumed by the flushing pump, thereby reducing the braking time of the interventional pump.

Description

Interventional pump braking control method, device, equipment and ventricular assist device

Technical Field

The present invention relates to the technical field of medical devices, and in particular to an interventional pump braking control method, device, equipment and a ventricular assist device.

Background Art

A ventricular assist device (VAD), also called a mechanical circulatory assist device, is a device that helps the heart pump blood from the lower heart chambers (ventricles) to the rest of the body.

The ventricular assist device includes an interventional pump for delivering blood and a flushing pump for delivering flushing fluid. During the power transmission process of the impeller of the interventional pump, there are multiple rotating parts, such as the drive shaft and the proximal and distal bearings supporting the impeller. Therefore, during the catheter pump process, flushing fluid needs to be injected into the catheter to lubricate and cool the above-mentioned rotating parts. In actual scenarios, when there is an emergency, the motor of the interventional pump can be turned off to stop the interventional pump from working to avoid damage to the patient's body.

However, in the above scheme, after the command is issued to shut down the motor of the intervention pump, the motor of the intervention pump will continue to rotate due to inertia and cannot be stopped immediately.

Summary of the invention

The present application provides an interventional pump braking control method, device, equipment and ventricular assist device, which reduce the emergency braking time of the interventional pump. The technical solution is as follows.

On the one hand, an interventional pump brake control method is provided, the method is applied to a ventricular assist device, the ventricular assist device comprises a power supply module, a drive motor, an interventional pump and a flushing pump; the drive motor is coupled to the interventional pump to drive the interventional pump to rotate; the flushing pump is used to deliver flushing fluid to the interventional pump; the drive motor is connected in parallel with the flushing pump, the drive motor is connected to the power supply module through a first branch, and the flushing pump is connected to the power supply module through a second branch;

The method comprises:

In response to the emergency braking instruction information for the interventional pump, the drive motor is braked, and the target control parameter of the flushing pump is updated to the first target data; the first target data is used to instruct the flushing pump to consume the induced current generated by the drive motor, and the induced current is generated based on the relative rotation between the drive motor and the interventional pump;

During the emergency braking phase of the interventional pump, the flushing pump is driven to operate based on the first target data and the induced current; wherein the induced current flows into the flushing pump through the second branch.

Another aspect of the present invention provides an interventional pump brake control device, which is applied to a ventricular assist device, wherein the ventricular assist device comprises a power supply module, a drive motor, an interventional pump and a flushing pump; the drive motor is coupled to the interventional pump to drive the interventional pump to rotate; the flushing pump is used to deliver flushing fluid to the interventional pump; the drive motor is connected in parallel with the flushing pump, the drive motor is connected to the power supply module via a first branch, and the flushing pump is connected to the power supply module via a second branch;

The intervention pump brake control device comprises:

a parameter updating module, configured to brake the drive motor in response to the emergency braking instruction information of the interventional pump, and update the target control parameter of the flushing pump to a first target data; the first target data is used to instruct the flushing pump to consume the induced current generated by the drive motor, the induced current being generated based on the relative rotation between the drive motor and the interventional pump;

A pump control module is used to drive the flushing pump to work based on the first target data and the induced current during the emergency braking stage of the interventional pump; wherein the induced current flows into the flushing pump through the second branch.

Another aspect of the present invention provides a computer device, which includes a processor and a memory, wherein the memory stores at least one instruction, and the at least one instruction is loaded and executed by the processor to implement the above-mentioned intervention pump brake control method.

Another aspect of the present invention provides a ventricular assist device, the ventricular assist device comprising a controller, a power supply module, a drive motor, an interventional pump and a flushing pump; the drive motor is coupled to the interventional pump to drive the interventional pump to rotate; the flushing pump is used to deliver flushing fluid to the interventional pump; the drive motor is connected in parallel with the flushing pump, the drive motor is connected to the power supply module via a first branch, and the flushing pump is connected to the power supply module via a second branch;

The controller is used to:

In response to the emergency braking instruction information of the interventional pump, the driving motor is controlled to brake, and the target control parameter of the flushing pump is updated to the first target data; the first target data is used to instruct the flushing pump to consume the induced current generated by the driving motor, and the induced current is generated based on the relative rotation between the driving motor and the interventional pump;

During the emergency braking phase of the interventional pump, the flushing pump is controlled to operate based on the first target data and the induced current; wherein the induced current flows into the flushing pump through the second branch.

The technical solution provided by this application may have the following beneficial effects:

The ventricular assist device involved in the present application includes a power supply module, an interventional pump and a flushing pump, and the interventional pump and the flushing pump are connected in parallel and form a loop with the power supply module respectively; at this time, if emergency braking command information for the interventional pump is received, the target control parameter of the flushing pump can be updated to the first target data, thereby controlling the working current of the flushing pump during operation, so that the electric energy generated by electromagnetic induction during emergency braking of the interventional pump can be quickly consumed by the flushing pump, thereby reducing the braking time of the interventional pump.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

FIG1 is a schematic structural diagram of a ventricular assist device according to an exemplary embodiment;

FIG2 is a schematic diagram showing the operating status of an interventional pump and a flushing pump according to an embodiment of the present application;

FIG3 is a schematic diagram showing a braking state of an intervention pump according to an embodiment of the present application;

FIG4 is a schematic flow chart of an intervention pump brake control method according to an exemplary embodiment;

FIG5 is a schematic flow chart of an intervention pump brake control method according to another exemplary embodiment;

FIG6 is a schematic flow chart of an intervention pump brake control method according to another exemplary embodiment;

FIG7 is a schematic diagram showing the structure of a ventricular assist device according to an embodiment of the present application;

FIG8 is a structural block diagram of an intervention pump brake control device according to an exemplary embodiment;

FIG9 is a schematic diagram of the structure of a computer device provided in an embodiment of the present application;

FIG. 10 is a schematic diagram of a flow chart of an intervention pump emergency braking process in an embodiment of the present application.

DETAILED DESCRIPTION

The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

It should be understood that the "indication" mentioned in the embodiments of the present application can be a direct indication, an indirect indication, or an indication of an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association relationship between A and B.

In the description of the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between two items, or an association relationship between the two items, or a relationship of indication and being indicated, configuration and being configured, etc.

In an embodiment of the present application, "predefinition" can be achieved by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in a device (for example, including a terminal device and a network device). The present application does not limit its specific implementation method.

FIG1 is a schematic diagram of the structure of a ventricular assist device according to an exemplary embodiment. As shown in FIG1 , the device includes a power supply module 100, an interventional pump (not shown in the figure), a flushing pump (not shown in the figure), a controller (MCU) 110, a drive motor 120 corresponding to the interventional pump, a first drive module (such as a drive/switching circuit) 130 of the drive motor, a flushing pump motor 140, and a second drive module (such as a drive/switching circuit) 150 corresponding to the flushing pump motor. Among them, the drive motor 120 is coupled to the interventional pump to drive the interventional pump to rotate, thereby driving the interventional pump to transport blood; the flushing pump motor 140 is fixedly connected to the flushing pump to drive the flushing pump to rotate, thereby driving the flushing pump to transport flushing fluid into the interventional pump. The drive motor 120 corresponding to the interventional pump is connected to the power supply module through a first branch, and the flushing pump is connected to the power supply module through a second branch.

As can be seen from Figure 1, the first drive module and the second drive module respectively form a loop with the controller, and the two are connected in parallel to the power supply module and are respectively connected to the controller. The controller controls the interventional pump and the flushing pump by controlling the two drive modules, and the interventional pump and the flushing pump are therefore in a parallel state.

The first driving module 130 and the power supply module 100 form a loop, i.e., the above-mentioned first branch, so that the power supply module 100 can supply power to the first driving module 130, and the controller 110 can control the first driving module 130, thereby controlling the power supply current of the first driving module 130 to the driving motor 120; the first driving module 130 is used to drive the above-mentioned driving motor 120 to work, so as to realize blood transportation.

Optionally, the driving motor 120 may be a BLDC Motor (brushless direct current motor).

Optionally, the second driving module 150 also forms a loop with the power supply module 100, so that the power supply module 100 can supply power to the second driving module 150; the second driving module 150 is used to drive the flushing pump motor 140 to work, so as to realize the delivery of flushing liquid.

Optionally, the flushing pump motor 140 may be a stepper motor.

The controller 110 in the ventricular assist device can be an MCU (Microcontroller Unit). Optionally, the controller can also be a device with data processing capabilities such as a CPU (Central Processing Unit) and a single-chip microcomputer. The controller is connected to the first drive module and the second drive module respectively to control the working status of the interventional pump and the flushing pump.

Please refer to Figure 2, which shows a schematic diagram of the operating state of an interventional pump and a flushing pump involved in an embodiment of the present application. As shown in Figure 2, when the interventional pump and the flushing pump are in normal working state, the power supply module 100 provides a power supply voltage U and generates a current I on the trunk line. At this time, the current I is transmitted to the first drive module 130 and the second drive module 150 respectively, so that the interventional pump and the flushing pump can work normally.

In the above working state, the first driving module 130 is connected to the power supply module 100 to form a first branch Is1, and the current flows from the positive electrode of the power supply module to the first driving module 130, and then from the first driving module 130 to the negative electrode of the power supply module 100.

Similarly, in the above working state, the second driving module 150 is connected in parallel with both sides of the first driving module 130 and connected to the power supply module 100 to form a second branch Is2, and the current flows from the positive pole of the power supply module 100 to the second driving module 150, and then from the second driving module 150 to the negative pole of the power supply module 100.

The first driving module 130 may be a driving/switching circuit of a driving motor, and the second driving module 150 may be a driving switching circuit of a flushing pump motor.

In the above process, the controller 110 can control the working state of the interventional pump and the flushing pump in real time. For example, the controller 110 can control the driving parameters of the driving/switching circuit of the driving motor and the driving/switching circuit of the flushing pump to adjust the working state of the driving motor 120 and the flushing pump motor 140. When the driving/switching circuit of the driving motor and the driving/switching circuit of the flushing pump are in the running state, the motor of the interventional pump and the motor of the flushing pump are allowed to enter the working state.

When the interventional pump or flushing pump is in normal working condition, the controller may also stop outputting control signals to the drive/switching circuit of the drive motor or the drive/switching circuit of the flushing pump, so that the drive/switching circuit of the drive motor or the drive/switching circuit of the flushing pump is in the off state, so as to shut down the drive motor of the interventional pump or the flushing pump motor.

In actual application scenarios, there may be an emergency situation where the interventional pump needs to be shut down. Please refer to Figure 3, which shows a schematic diagram of the braking state of the interventional pump involved in the embodiment of the present application. As shown in Figure 3, when there is an emergency situation where the interventional pump needs to be shut down, the controller 110 can stop outputting control signals to the drive/switch circuit of the drive motor 120, but when the drive/switch circuit of the drive motor 120 stops controlling the motor, due to the existence of inertia and the coupling connection between the drive motor 120 and the interventional pump, the internal rotor of the motor and the rotor of the interventional pump will continue to rotate relative to each other due to inertia, and generate an induced electromotive force. At this time, the drive motor 120 is equivalent to a generator connected in parallel with the power supply module 100. The direction of the induced current is shown as Is1 in Figure 3, which is in the same direction as the current direction of the power supply module 100. If the electric energy generated by the drive motor cannot be consumed in time, the drive motor 120 will continue to rotate for a period of time, and the interventional pump cannot stop rotating immediately.

Optionally, the driving motor and the interventional pump are connected by eddy current coupling, the driving motor includes an active component, and the interventional pump includes a driven component; the active component and the driven component are overlapped and nested in connection; and the driven component rotates axially inside the active component.

When the driving circuit of the interventional pump stops driving the motor, the driven member and the driving member rotate relative to each other, thereby generating an induced electromotive force in the internal circuit of the driving motor.

Optionally, the drive motor and the interventional pump are magnetically coupled, the drive motor includes a first magnet, and the interventional pump includes a second magnet; the first magnet is connected to the drive circuit of the drive motor; when the interventional pump is stopped, the first magnet and the second magnet produce a speed difference, thereby generating an induced electromotive force in the internal circuit of the drive motor.

In a specific application example, a driving motor of an interventional pump includes a motor and a driving rotor, and the interventional pump includes a driven rotor;

Wherein, when the driving motor and the interventional pump are in an engaged state, the driving rotor is coupled with the driven rotor to drive the driven rotor to rotate;

During the period when the target control parameter of the flushing pump is updated to the first target data, relative rotation occurs between the driving rotor and the driven rotor to generate an induced current, and the electric energy generated by the induced current is consumed by the flushing pump.

The driving rotor may be an active element in an eddy current coupling mode or a first magnet in a magnetic coupling mode, and correspondingly, the driven rotor may be a driven element in an eddy current coupling mode or a second magnet in a magnetic coupling mode.

FIG4 is a flow chart of an interventional pump brake control method according to an exemplary embodiment. The method is executed by a controller in a ventricular assist device as shown in FIG1. Optionally, the ventricular assist device includes a power supply module, a drive motor, an interventional pump, and a flushing pump; the drive motor is coupled to the interventional pump to drive the interventional pump to rotate; the flushing pump is used to deliver flushing fluid to the interventional pump; the drive motor is connected in parallel with the flushing pump, the drive motor is connected to the power supply module through a first branch, and the flushing pump is connected to the power supply module through a second branch.

As shown in FIG4 , the intervention pump brake control method may include the following steps:

Step 401 : in response to emergency braking instruction information for the intervention pump, brake the drive motor and update the target control parameter of the flushing pump to the first target data.

The first target data is used to instruct the flushing pump to consume the induced current generated by the drive motor, where the induced current is generated based on the relative rotation between the drive motor and the interventional pump.

In an embodiment of the present application, in order to speed up the stopping speed of the interventional pump, when the interventional pump meets the conditions requiring emergency stopping, emergency braking command information can be generated accordingly. At this time, after the controller detects the emergency braking command information, it can adjust the target control parameters of the flushing pump, thereby adjusting the working current consumed by the flushing pump during operation.

The emergency braking command information may be triggered according to a preset control operation, or may be triggered according to an alarm or abnormal situation detected by the device itself.

Step 402: During the emergency braking phase of the interventional pump, the flushing pump is driven to operate based on the first target data and the induced current; wherein the induced current flows into the flushing pump through the second branch.

After the target control parameters of the flushing pump are updated to the first target data, the input working current of the flushing pump changes (it can be a change in size or a change in input source). When the interventional pump receives the emergency braking command information and is in the electromagnetic induction state to generate induced electromotive force, the flushing pump can consume more current due to the change in the target control parameters. Therefore, it can consume the above-mentioned induced current, thereby increasing the consumption rate of the induced current and shortening the stop time of the interventional pump, so that the interventional pump can quickly perform emergency braking.

In summary, the ventricular assist device involved in the present application includes a power supply module, an interventional pump and a flushing pump, and the interventional pump and the flushing pump are connected in parallel and form a loop with the power supply module respectively; at this time, if emergency braking command information for the interventional pump is received, the target control parameter of the flushing pump can be updated to the first target data, thereby controlling the working current of the flushing pump during operation, so that the electric energy generated by electromagnetic induction during emergency braking of the interventional pump can be quickly consumed by the flushing pump, thereby reducing the braking time of the interventional pump.

In some embodiments, the above target control parameters include but are not limited to torque, speed, flow rate, and set working current; accordingly, the first target data include but are not limited to the first target torque, the first target speed, the first target flow rate, and the first target working current, and the first target data is greater than or equal to the second target data corresponding to the target control parameter before emergency braking. The second target data include but are not limited to the second target torque, the second target speed, the second target flow rate, and the second target working current.

The controller can make the flushing pump consume the induction current by modifying the above target control parameters. This means that the current delivered by the second drive module to the flushing pump motor needs to include the induction current component, and the amount of the power supply current component or the presence or absence of the power supply current component can be adjusted according to actual conditions.

In an exemplary embodiment, driving the flushing pump based on the first target data and the induced current includes at least the following methods:

Mode 1: With the target control parameter reaching the first target data as the goal, the flushing pump is controlled to work based on the power supply current and the induction current;

Method 2: Control the flushing pump based on the induction current.

The power supply current refers to the current used by the power supply module to supply power to the flushing pump.

In method 1, the power supply module can still power the flushing pump. During the intervention pump braking stage, the flushing pump can be dually powered by the power supply current and the induction current. Under this dual power supply, the speed and flow rate of the flushing pump can be modified to change the working state of the flushing pump, thereby making the flushing pump consume the induction current and shortening the intervention pump braking time.

When the first target data is equal to the second target data, the controller can control the working state of the flushing pump to remain unchanged, but needs to adjust the power supply current so that the induced current is input to the second drive module and then input into the flushing pump motor by the second drive module.

When the first target data is greater than the second target data, the target control parameter corresponding to the flushing pump is increased to the first target data when the intervention pump braking occurs, but the actual parameter data at the starting moment of the intervention pump braking cannot reach the first target data in time. Therefore, the second drive module needs to output more current to the flushing pump. The induced current generated by the driving motor during braking can therefore be input to the flushing pump motor through the second drive module, so that the flushing pump can consume the above-mentioned induced current and shorten the emergency braking time of the intervention pump.

The first target data may at least be a first target torque, a first target rotation speed, a first target flow rate or a first target operating current.

The first target torque is used to indicate the target torque of the flushing pump during the intervention pump braking process, the second target torque is used to indicate the target torque of the flushing pump before the intervention pump braking, and the second target torque is less than or equal to the first target torque. When the first target torque is greater than the second target torque, the target torque corresponding to the flushing pump is increased to the first target torque during the intervention pump braking, but the torque at the start of the intervention pump braking does not actually reach the first target torque, so the second drive module needs to output more current to the flushing pump, and the induced current generated by the driving motor during braking can therefore be input to the flushing pump motor through the second drive module, so that the flushing pump can consume the above-mentioned induced current and shorten the emergency braking time of the intervention pump.

The first target speed, the first target flow rate or the first target operating current is similar to the first target torque and will not be described in detail here.

Regardless of whether the first target data is equal to the second target data or the first target data is greater than the second target data, the induced current is not a constant input quantity, so the controller needs to adjust the input of the power supply current on the motor side of the flushing pump in real time, which can also be said to be the output of the second drive module. When controlling the operation of the flushing pump, the current data corresponding to the target control parameter can be compared with the first target data, so as to achieve the first target data and gradually change the working state of the flushing pump.

In an exemplary embodiment, the controller or the second driving module may determine current data corresponding to the target control parameter; and control the input of the power supply current according to the current data corresponding to the target control parameter and the first target data.

Specifically, changes in the induced current, such as a decrease, will instantly reduce the current data corresponding to the target control parameter, such as reducing the speed, flow, torque, and operating current. This will result in the current data corresponding to the target control parameter failing to reach the first target data in a timely manner. Therefore, by comparing the current data with the first target data, the easily controllable power supply current can be feedback-adjusted. By adjusting the power supply current, the flushing pump can consume the induced current while maintaining a stable working state, thereby maintaining the stability of the system.

In mode 2, the controller can stop the power supply module from supplying power to the flushing pump and only control the flushing pump to work based on the induced current, thereby making the flushing pump consume the induced current and shortening the braking time of the intervention pump.

In some embodiments, the controller can adjust the power supply current input by the power supply module to the flushing pump, for example, the power supply current of the power supply module to the flushing pump can be reduced or stopped. In this process, the amount of reduction in the power supply current or the judgment of whether to stop the power supply current can be jointly determined by the target control parameter and the first target data. Among them, the target control parameter can be the current target control parameter of the power supply current (i.e., the power supply current target control parameter), and the first target data can be the power supply current target data. In the intervention pump braking stage, based on the target data of the power supply current, the power supply current of the flushing pump by the power supply module can be reduced or stopped. If the power supply current is reduced, the specific current reduction amount can also be specified. Subsequently, the flushing pump can be driven to work based on the reduced power supply current and the induced current, or, when the power supply current is stopped, the flushing pump can be driven to work only based on the induced current. In this way, the working state of the flushing pump can be flexibly adjusted in a variety of ways, thereby improving the convenience of adjusting the flushing pump.

FIG5 is a flow chart of an interventional pump brake control method according to an exemplary embodiment. The method is executed by a controller in a ventricular assist device as shown in FIG1 . As shown in FIG5 , the interventional pump brake control method may include the following steps:

Step 501 : In response to the emergency brake instruction information of the interventional pump, the first driving module is controlled to stop outputting the control signal to the driving motor.

In an embodiment of the present application, after the controller receives emergency braking command information for the interventional pump, the controller can immediately stop outputting control signals to the drive motor. However, at this time, the drive motor cannot stop immediately due to inertia and will generate induced electromotive force due to cutting of magnetic flux lines.

Step 502: When the output of the control signal to the driving motor is stopped, the target control parameter of the flushing pump is updated to the first target data.

Step 503: Control the flushing pump to operate according to the first target data to consume the electric energy generated during the braking process of the intervention pump.

After the controller updates the first target data of the flushing pump, the first target data can indicate a new working state of the flushing pump, and the second driving module can drive the flushing pump to the updated working state according to the first target data, thereby consuming the induced electric energy generated by the driving motor as soon as possible.

In the intervention pump braking control method shown in FIG5 , the controller can promptly update the target control parameters of the flushing pump after braking the drive motor, thereby minimizing the impact of changes in the target control parameters on the flushing pump while ensuring rapid consumption of the electrical energy generated by the drive motor.

FIG6 is a flow chart of an interventional pump brake control method according to an exemplary embodiment. The method is executed by a controller in a ventricular assist device as shown in FIG1 . As shown in FIG6 , the interventional pump brake control method may include the following steps:

Step 601: in response to emergency braking instruction information for an intervention pump, updating a target control parameter of a flushing pump to first target data.

Step 602, controlling the flushing pump to operate according to the first target data.

In the embodiment of the present application, the controller can first update the target control parameter of the flushing pump to the first target data when receiving the emergency brake instruction information for the intervention pump. For example, the first target data is the relevant parameter data indicating to increase the working current of the flushing pump, and the second driving module can increase the upper limit value of the current output to the flushing pump motor based on the update of the first target data.

Step 603 , braking the drive motor to consume the electric energy generated by the intervention pump during emergency braking through the flushing pump.

Optionally, when it is detected that the target control parameter of the flushing pump is updated to the first target data, that is, when the driving parameter of the flushing pump changes, the controller can control the first driving module to stop driving the above-mentioned driving motor. At this time, the driving motor generates the above-mentioned induced current, and the driving parameter of the flushing pump has changed. For example, the upper limit value of the current output by the second driving module to the flushing pump motor is increased. Therefore, when the induced current flows to the second driving module through the second branch, it can be output to the flushing pump motor by the second driving module in time. The flushing pump can start to consume the above-mentioned induced current in a very short time, thereby reducing the braking time of the intervention pump.

In the intervention pump braking control method shown in Figure 6, the controller can perform two actions in parallel after responding to the intervention pump braking instruction, one is to update the target control parameters of the flushing pump, and the other is to brake the drive motor. Therefore, there is no need to wait until the motor is braked before updating the target control parameters of the flushing pump. The target control parameters of the flushing pump can be updated in advance, waiting to consume the induced current generated when the drive motor is braked. Once the drive motor generates induced current by braking, the flushing pump can directly consume the induced current, thereby reducing the time it takes for the drive motor to stop completely.

This application does not limit the sequence of the two actions of braking the drive motor and updating the target control parameters, and the configuration can be selected according to actual conditions.

Furthermore, the target control parameters may also include a parameter used to indicate the state of a loop formed by the flushing pump and the power supply module. The first target data includes a disconnection mark. In this case, the controller may disconnect the loop formed by the power supply module and the flushing pump according to the first target data.

That is, when the target control parameters of the flushing pump are modified to the first target data, relative to the original target control parameters, the controller can disconnect the circuit formed by the power supply module and the flushing pump. At this time, the electric energy consumed during the operation of the flushing pump is completely provided by the electromagnetic induction process of the interventional pump, thereby greatly improving the energy consumption rate of the interventional pump.

In a possible implementation, please refer to FIG. 7, which shows a schematic diagram of the structure of a ventricular assist device involved in an embodiment of the present application. As shown in FIG. 7, the flushing pump of the ventricular assist device includes an infusion pump and a circulation pump; the infusion pump and the circulation pump respectively form a loop with the power supply module; the infusion pump is used to pump flushing liquid into the interventional pump, such as delivering the flushing liquid from the perfusion bag to the driving catheter handle in the interventional pump, and the flushing liquid enters the target object through the catheter of the interventional pump under the pumping of the infusion pump; the circulation pump is used to drive the flushing liquid to circulate between the interventional pump and the flushing pipeline.

Specifically, under the pumping of the infusion pump, the flushing liquid reaches the circulating pump through the flushing pipeline, and the circulating pump continues to pump the flushing liquid into the driving catheter handle; after the flushing liquid enters the driving catheter handle, a part of it enters the catheter of the interventional pump and enters the target object's body, and the flow rate of this part is the same as the flow rate of the infusion pump, and the other part is circulated back to the flushing pipeline and is continued to be pumped into the driving catheter handle by the circulating pump. In other words, the circulating pump is used to drive part of the flushing liquid to circulate between the interventional pump and the flushing pipeline to cool the driven rotor in the driving catheter handle.

At this time, the controller can drive the infusion pump and/or the circulation pump to work based on the first target data and the induced current, so as to consume the induced current through the infusion pump and/or the circulation pump.

That is, when the flushing pump includes an infusion pump and a circulation pump, and the second drive module includes an infusion pump drive module and a flushing pump drive module, the controller can select at least one of them to update the target control parameters. Since the infusion pump and the circulation pump both form a loop with the power supply module, and the infusion pump drive module and the flushing pump drive module are both connected in parallel with the first drive module, each of them can receive the electric energy generated by the drive motor due to the electromagnetic induction state. Therefore, the first target data can be parameter data for adjusting the control parameters of at least one of the infusion pump and the circulation pump, so that at least one of the infusion pump and the circulation pump consumes the induced current.

Optionally, since the circulating pump is used to drive the flushing fluid to circulate in the driving catheter handle, the flow rate of the circulating pump only determines the circulating flow rate of the flushing fluid and will not affect the amount of flushing fluid entering the human body. Therefore, it will not cause a major impact on the human body. Therefore, it is preferred to use the circulating pump to consume the induced current, such as increasing the flow rate of the circulating pump, thereby using the circulating pump to consume the induced current and avoiding the burden and impact of increased flushing volume on the target object.

In an embodiment of using a circulating pump to consume the induced current, the working state of the infusion pump is maintained, and the circulating pump is driven to work based on the power supply current and the induced current to consume the induced current through the circulating pump. The power supply current refers to the current used by the power supply module to supply power to the flushing pump.

In the embodiment of the present application, the emergency braking instruction information of the interventional pump may be generated when an emergency situation for the interventional pump is detected, for example, the target object may be abnormal, the operation of the interventional pump may have problems, or the user may actively and urgently brake the interventional pump for special reasons. The emergency braking instruction information includes, but is not limited to: a first braking instruction triggered when the physiological monitoring data is abnormal, a second braking instruction triggered based on the emergency braking operation, and a third braking instruction triggered when the ventricular assist device is abnormal.

The abnormal conditions indicated by abnormal physiological monitoring data include, but are not limited to, abnormal blood pressure, chord tissue entangled with the impeller, abnormal suction, and the like.

In a possible implementation, the interventional pump includes a pressure sensor; the controller can monitor the blood pressure of the target object through the pressure sensor; and when the blood pressure of the target object reaches a pressure threshold, a first braking instruction is generated.

When the pressure sensor in the interventional pump detects that the target object's blood pressure reaches the pressure threshold, it means that the target object's body is in an emergency state. At this time, the interventional pump is urgently braked to stop pumping blood, and a corresponding alarm signal is issued to prompt that the target object's physical condition is abnormal.

In a possible implementation, the controller monitors the data of the drive motor, such as current, speed, torque and other parameters, in real time, and generates a first braking instruction when the monitored data conforms to the alarm rules corresponding to the abnormal physiological condition.

For example, the controller will also monitor the torque of the interventional pump. Since the interventional pump runs in the heart, it is possible that the interventional pump impeller may be entangled in the chordae tendineae in the heart, causing heart damage. At this time, the relevant data of the drive motor may mutate, such as an increase in current. At this time, emergency braking command information is generated for the interventional pump to reduce the possibility of damage to the target object's body.

In addition to the ventricular assist device automatically monitoring the target subject's physical condition and generating emergency braking command information when an abnormality is detected, the device operator can also actively emergency brake the interventional pump through the human-computer interaction module on the ventricular assist device.

In a possible implementation, the ventricular assist device is provided with an emergency brake control; the user's triggering operation of the emergency brake control is to issue a second brake instruction.

Optionally, the emergency brake control includes but is not limited to a physical button provided on the ventricular assist device; the trigger operation includes but is not limited to a pressing operation.

That is, a physical button for emergency stop may be separately provided on the ventricular assist device, and when the user presses the physical button, emergency braking instruction information for the interventional pump may be generated.

Optionally, a display module is provided on the ventricular assist device; a user operation interface is displayed in the display module; and the emergency brake control is provided in the user operation interface.

In another possible implementation, the controller may detect relevant parameters of the ventricular assist device to determine whether the ventricular assist device is operating abnormally, such as detecting that the drive current or the drive motor temperature exceeds a threshold value, thereby triggering the third braking instruction.

The embodiment of the present application does not limit the triggering method of the intervention pump emergency brake information, and the triggering conditions can be set according to the actual situation. The emergency brake command information is triggered in combination with the above multiple manual and automatic situations, thereby emergency braking the intervention pump, which improves the safety of the intervention pump.

In summary, the ventricular assist device involved in the present application includes a power supply module, an interventional pump and a flushing pump, and the interventional pump and the flushing pump are connected in parallel and form a loop with the power supply module respectively; at this time, if emergency braking command information for the interventional pump is received, the target control parameter of the flushing pump can be updated to the first target data, thereby controlling the working current of the flushing pump during operation, so that the electric energy generated by electromagnetic induction during emergency braking of the interventional pump can be quickly consumed by the flushing pump, thereby reducing the braking time of the interventional pump.

The present application also provides a ventricular assist device, the ventricular assist device comprising a controller, a power supply module, a drive motor, an interventional pump and a flushing pump; the drive motor is coupled to the interventional pump to drive the interventional pump to rotate; the flushing pump is used to deliver flushing fluid to the interventional pump; the drive motor is connected in parallel with the flushing pump, the drive motor is connected to the power supply module through a first branch, and the flushing pump is connected to the power supply module through a second branch;

The controller is used to:

In response to the emergency braking instruction information of the interventional pump, the driving motor is controlled to brake, and the target control parameter of the flushing pump is updated to the first target data; the first target data is used to instruct the flushing pump to consume the induced current generated by the driving motor, and the induced current is generated based on the relative rotation between the driving motor and the interventional pump;

During the emergency braking phase of the interventional pump, the flushing pump is controlled to operate based on the first target data and the induced current; wherein the induced current flows into the flushing pump through the second branch.

Fig. 8 is a structural block diagram of an interventional pump brake control device according to an exemplary embodiment. The device is applied to a ventricular assist device, which includes a power supply module, a drive motor, an interventional pump, and a flushing pump; the drive motor is coupled to the interventional pump to drive the interventional pump to rotate; the flushing pump is used to deliver flushing fluid to the interventional pump; the drive motor is connected in parallel with the flushing pump, the drive motor is connected to the power supply module through a first branch, and the flushing pump is connected to the power supply module through a second branch;

The intervention pump brake control device comprises:

a parameter updating module 801, for braking the drive motor in response to the emergency braking instruction information of the interventional pump, and updating the target control parameter of the flushing pump to a first target data; the first target data is used to instruct the flushing pump to consume the induced current generated by the drive motor, the induced current being generated based on the relative rotation between the drive motor and the interventional pump;

The pump control module 802 is used to drive the flushing pump to work based on the first target data and the induced current during the emergency braking stage of the interventional pump; wherein the induced current flows into the flushing pump through the second branch.

In one embodiment, the target control parameter includes at least one of torque, speed, flow, and set working current, and the first target data includes at least one of a first target torque, a first target speed, a first target flow, and a first target working current. The first target data is greater than or equal to the second target data corresponding to the target control parameter before emergency braking.

In one embodiment, the pump control module 802 is specifically used to control the flushing pump to operate based on the power supply current and the induced current with the target control parameter reaching the first target data, or to control the flushing pump to operate based on the induced current, wherein the power supply current refers to the current used by the power supply module to supply power to the flushing pump.

In one embodiment, the intervention pump brake control device is further used to determine current data corresponding to the target control parameter; and control the input of the power supply current according to the current data corresponding to the target control parameter and the first target data.

In one embodiment, the target control parameter includes a power supply current target control parameter, the first target data includes a power supply current target data, and the pump control module 802 is specifically used to reduce or stop the power supply current of the power supply module to the flushing pump based on the power supply current target data; drive the flushing pump to work based on the reduced power supply current and the induced current, or drive the flushing pump to work based on the induced current.

In one embodiment, the flushing pump includes an infusion pump and a circulation pump; the infusion pump and the circulation pump respectively form a loop with the power supply module; the infusion pump is used to pump flushing liquid into the interventional pump, and the flushing liquid enters the target object through the catheter of the interventional pump under the pumping of the infusion pump; the circulation pump is used to drive the flushing liquid to circulate between the interventional pump and the flushing pipeline;

The pump control module 802 is specifically configured to drive the infusion pump and/or the circulation pump to operate based on the first target data and the induced current, so as to consume the induced current through the infusion pump and/or the circulation pump.

In one embodiment, the pump control module 802 is specifically used to maintain the working state of the infusion pump and drive the circulation pump to work based on the power supply current and the induced current so as to consume the induced current through the circulation pump. The power supply current refers to the current used by the power supply module to supply power to the flushing pump.

In one embodiment, the emergency braking instruction information includes at least one of: a first braking instruction triggered when physiological monitoring data is abnormal, a second braking instruction triggered based on an emergency braking operation, and a third braking instruction triggered when the ventricular assist device operates abnormally.

To summarize, the ventricular assist device involved in the present application includes a controller, a power supply module, an interventional pump and a flushing pump, and the interventional pump is connected in parallel with the flushing pump and forms a loop with the power supply module respectively; at this time, if emergency braking command information for the interventional pump is received, the target control parameter of the flushing pump can be updated to the first target data, thereby controlling the working current of the flushing pump during operation, so that the electric energy generated by electromagnetic induction during emergency braking of the interventional pump can be consumed more quickly by the flushing pump, thereby reducing the emergency braking time of the interventional pump.

An embodiment of the present invention further provides a computer device having the motor control device shown in FIG. 8 above.

Please refer to Figure 9, which is a schematic diagram of the structure of a computer device provided by an embodiment of the present application. As shown in Figure 9, the computer device includes: one or more processors 10, a memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. The various components communicate with each other using different buses and can be installed on a common motherboard or installed in other ways as needed. The processor can process instructions executed in the computer device, including instructions stored in or on the memory to display graphical information of the GUI on an external input/output device (such as a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and/or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple computer devices can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). In Figure 9, a processor 10 is taken as an example.

The processor 10 may be a central processing unit, a network processor or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic or any combination thereof.

The memory 20 stores instructions executable by at least one processor 10, so that the at least one processor 10 executes the method shown in the above embodiment.

The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created by the use of a computer device based on the presentation of a small program landing page, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 20 may optionally include a memory remotely arranged relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive; the memory 20 may also include a combination of the above types of memory.

The computer device further comprises a communication interface 30 for the computer device to communicate with other devices or a communication network.

FIG10 shows a schematic diagram of the process of emergency braking of an interventional pump. The execution process of the above ventricular assist device, control device or computer device during the braking of the interventional pump includes:

Determine whether the interventional pump is started; when the interventional pump is started, determine whether the system is operating normally; determine whether a stop or alarm-triggered stop drive motor (BLDC) command is received; if a command is received, enable the second set of control parameters (i.e. the first target data mentioned above, the first set of control parameters can be the second target data mentioned above) to increase the stepper motor (flushing pump motor) drive current and enable drive, and stop driving the interventional pump drive motor signal output.

In an exemplary embodiment, a computer-readable storage medium is also provided, which is used to store at least one computer program, and the at least one computer program is loaded and executed by a processor to implement all or part of the steps in the above method. For example, the computer-readable storage medium can be a read-only memory (ROM), a random access memory (RAM), a compact disc read-only memory (CD-ROM), a magnetic tape, a floppy disk, an optical data storage device, etc.

In an exemplary embodiment, a computer program product or a computer program is also provided, the computer program product or the computer program comprising computer instructions, the computer instructions being stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes all or part of the steps of the method shown in any of the embodiments of FIG. 4 to FIG. 6 above.

Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims (11)

1. An intervention pump braking control method is characterized in that the method is applied to a ventricular assist device, and the ventricular assist device comprises a power supply module, a driving motor, an intervention pump and a flushing pump; the driving motor is coupled with the intervention pump to drive the intervention pump to rotate; the flushing pump is used for conveying flushing liquid to the intervention pump; the driving motor is connected with the flushing pump in parallel, the driving motor is connected with the power supply module through a first branch, and the flushing pump is connected with the power supply module through a second branch;

The method comprises the following steps:

Braking the driving motor in response to emergency braking instruction information for the intervention pump, and updating a target control parameter of the flushing pump to first target data; the first target data is used for indicating the flushing pump to consume the induction current generated by the driving motor, and the induction current is generated based on the relative rotation between the driving motor and the intervention pump;

Driving the flushing pump to operate based on the first target data and the induced current in an emergency braking phase of the intervention pump; wherein the induced current flows into the flush pump through the second branch.

2. The method of claim 1, wherein the target control parameter comprises at least one of torque, rotational speed, flow, and set operating current, and the first target data comprises at least one of a first target torque, a first target rotational speed, a first target flow, and a first target operating current, the first target data being greater than or equal to a second target data corresponding to the target control parameter prior to emergency braking.

3. The method of claim 2, wherein said driving said flush pump to operate based on said first target data and said induced current comprises:

And taking the target control parameter as a target to reach the first target data, controlling the flushing pump to work based on a power supply current and the induced current, or controlling the flushing pump to work based on the induced current, wherein the power supply current is the current for the power supply module to supply power to the flushing pump.

4. A method according to claim 3, characterized in that the method further comprises:

determining current data corresponding to the target control parameters;

And controlling the input of the power supply current according to the current data corresponding to the target control parameter and the first target data.

5. The method of claim 1, wherein the target control parameter comprises a supply current target control parameter, the first target data comprises supply current target data, and driving the flush pump to operate based on the first target data and the induced current comprises:

reducing or stopping the supply current of the power supply module to the flushing pump based on the supply current target data;

And driving the flushing pump to work based on the reduced power supply current and the induced current, or driving the flushing pump to work based on the induced current.

6. The method of claim 1, wherein the flushing pump comprises an infusion pump and a circulation pump; the infusion pump and the circulating pump respectively form a loop with the power supply module; the infusion pump is used for pumping flushing fluid into the intervention pump, and the flushing fluid enters the target object body through the catheter of the intervention pump under the pumping of the infusion pump; the circulating pump is used for driving flushing liquid to circularly flow between the intervention pump and the flushing pipeline;

The driving the operation of the flushing pump based on the first target data and the induced current comprises the following steps:

the infusion pump and/or the circulation pump is driven to operate based on the first target data and the induced current to consume the induced current through the infusion pump and/or the circulation pump.

7. The method of claim 6, wherein the driving the infusion pump and/or the circulation pump to operate based on the first target data and the induced current comprises:

Maintaining the working state of the infusion pump, and driving the circulating pump to work based on a supply current and the induction current so as to consume the induction current through the circulating pump, wherein the supply current is the current for supplying power to the flushing pump by the power supply module.

8. The method according to any one of claims 1 to 7, wherein the emergency braking instruction information includes: at least one of a first braking order triggered when physiological monitoring data is abnormal, a second braking order triggered based on emergency braking operation, and a third braking order triggered when the ventricular assist device is abnormal.

9. An intervention pump brake control arrangement, characterized in that the arrangement is applied to a ventricular assist device comprising a power supply module, a drive motor, an intervention pump and a flushing pump; the driving motor is coupled with the intervention pump to drive the intervention pump to rotate; the flushing pump is used for conveying flushing liquid to the intervention pump; the driving motor is connected with the flushing pump in parallel, the driving motor is connected with the power supply module through a first branch, and the flushing pump is connected with the power supply module through a second branch;

The intervention pump braking control device comprises:

a parameter updating module for braking the driving motor in response to emergency braking instruction information for the intervention pump, and updating a target control parameter of the flushing pump to first target data; the first target data is used for indicating the flushing pump to consume the induction current generated by the driving motor, and the induction current is generated based on the relative rotation between the driving motor and the intervention pump;

The pump control module is used for driving the flushing pump to work based on the first target data and the induced current in an emergency braking stage of the intervention pump; wherein the induced current flows into the flush pump through the second branch.

10. A computer device comprising a processor and a memory having stored therein at least one instruction that is loaded and executed by the processor to implement the interventional pump brake control method of any one of claims 1 to 8.

11. A ventricular assist device, comprising a controller, a power module, a drive motor, an interventional pump, and a flushing pump; the driving motor is coupled with the intervention pump to drive the intervention pump to rotate; the flushing pump is used for conveying flushing liquid to the intervention pump; the driving motor is connected with the flushing pump in parallel, the driving motor is connected with the power supply module through a first branch, and the flushing pump is connected with the power supply module through a second branch;

The controller is used for:

Controlling the driving motor to brake in response to emergency brake instruction information of the intervention pump, and updating target control parameters of the flushing pump to first target data; the first target data is used for indicating the flushing pump to consume the induction current generated by the driving motor, and the induction current is generated based on the relative rotation between the driving motor and the intervention pump;

Controlling the flushing pump to operate based on the first target data and the induced current during an emergency braking phase of the intervention pump; wherein the induced current flows into the flush pump through the second branch.