CN116077810B

CN116077810B - Control method and device of flushing device

Info

Publication number: CN116077810B
Application number: CN202310376658.1A
Authority: CN
Inventors: 范晓生; 陈仕章; 余顺周
Original assignee: Shenzhen Core Medical Technology Co Ltd
Current assignee: Shenzhen Core Medical Technology Co Ltd
Priority date: 2023-04-11
Filing date: 2023-04-11
Publication date: 2023-07-11
Anticipated expiration: 2043-04-11
Also published as: CN116077810A

Abstract

The application provides a control method and device of a flushing device, wherein the method comprises the following steps: when detecting that the pipeline of the flushing device is abnormal, controlling the flushing device to operate in a first mode; and when the flushing device is operated for a first time period or a target pressure meets a preset condition, controlling the flushing device to operate in a second mode, wherein the target pressure is the pipeline outlet pressure of the flushing device, and the target pressure in the second mode is smaller than or equal to the target pressure in the first mode. The pipeline of the flushing device is operated in different modes when being in different states, so that the problem of pipeline blockage of the flushing device is solved, and the safety and stability of the fluid conveying process are ensured.

Description

Control method and device of flushing device

Technical Field

The present disclosure relates to the field of control technologies, and in particular, to a method and an apparatus for controlling a flushing device.

Background

The medical flushing fluid device is mainly used for conveying specific fluid to a human body or other medical devices, but when a blockage exists in a fluid path for conveying the fluid, the fluid flow conveyed by the flushing device is reduced, even the fluid cannot be conveyed, and the use of the flushing device and the safety of a user are seriously affected.

Disclosure of Invention

The embodiment of the application provides a control method and device for a flushing device, which can reduce the abnormal problem of a pipeline of the flushing device by switching the operation mode of the flushing device and ensure the safety and stability of the fluid conveying process.

In a first aspect, an embodiment of the present application provides a method for controlling a flushing device, the method including:

controlling the flushing device to operate in a first mode when detecting that the pipeline of the flushing device is abnormal;

controlling the flushing device to operate in a second mode when the flushing device is operated to a target condition;

the target condition includes at least one of: the flushing device operates in the first mode for a first period of time, and the target pressure of the flushing device in the first mode meets a preset condition;

wherein the target pressure is a line outlet pressure of the flushing device, the target pressure in the second mode being less than or equal to the target pressure in the first mode.

In a second aspect, embodiments of the present application provide a control device for a flushing device, the device comprising a control unit, wherein,

a control unit for controlling the flushing device to operate in a first mode when detecting that the pipeline of the flushing device is abnormal;

The control unit is further used for controlling the flushing device to operate in a second mode when the flushing device operates to a target condition; the target condition includes at least one of: the flushing device operates in the first mode for a first period of time, and the target pressure of the flushing device in the first mode meets a preset condition;

In a third aspect, embodiments of the present application provide an electronic device comprising a processor, a memory, a communication interface, and one or more programs stored in the memory and configured to be executed by the processor, the programs comprising instructions for performing part or all of the steps described in the method of the first aspect above.

In a fourth aspect, embodiments of the present application provide a computer-readable storage medium storing a computer program for electronic data exchange, where the computer program causes a computer to perform some or all of the steps described in the method of the first aspect.

In a fifth aspect, embodiments of the present application provide a computer program product, wherein the computer program product comprises a non-transitory computer readable storage medium storing a computer program, the computer program being operable to cause a computer to perform some or all of the steps described in the method according to the first aspect of the embodiments of the present application. The computer program product may be a software installation package.

According to the technical scheme, when the abnormality of the pipeline of the flushing device is detected, the flushing device is controlled to operate in a first mode; and when the flushing device is operated for a first time period or a target pressure meets a preset condition, controlling the flushing device to operate in a second mode, wherein the target pressure is the pipeline outlet pressure of the flushing device, and the target pressure in the second mode is smaller than or equal to the target pressure in the first mode. The pipeline of the flushing device is operated in different modes when being in different states, so that the problem of pipeline blockage of the flushing device is solved, and the safety and stability of the fluid conveying process are ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an interventional ventricular assist system according to an embodiment of the present application;

fig. 2 is a flow chart of a control method of a flushing device according to an embodiment of the present application;

FIG. 3 is a functional block diagram of a control device of a flushing device according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

For better understanding of the technical solutions of the present application by those skilled in the art, the technical solutions of the embodiments of the present application are clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art without the exercise of inventive faculty, are intended to be within the scope of protection of the present application based on the description of the embodiments herein.

The terms first, second and the like in the description and in the claims of the present application and in the above-described figures, are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, software, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In this application, a flushing device (e.g., peristaltic pump in an infusion pump) may include a motor, pump body, shaft, tubing, controller. The controller and the motor are arranged in the pump body, and the controller is accurately controlled through the running speed of the motor so as to control the fluid speed in the pipeline, wherein the faster the motor rotates, the faster the fluid conveying speed. The output shaft of motor is connected with the pivot, is provided with a plurality of cams in the pivot, and this a plurality of cams are installed in the pivot along axial transmission in proper order, and the cover is equipped with a peristaltic sheet on every cam, and epaxial cam makes the peristaltic sheet produce wave motion according to certain chronogenesis, receives the extrusion of peristaltic sheet at peristaltic sheet and the pipeline in the middle of the stripper plate, makes the fluid in the pipeline receive a continuous, with peristaltic sheet motion chronogenesis correlated thrust to the messenger fluid takes place to flow, reaches the effect of carrying fluid.

Further, to detect the pressure in the pipeline in real time, the flushing device further comprises a pressure sensor, wherein the pressure sensor can be arranged at the outlet of the pipeline and used for collecting the pressure of the liquid at the outlet of the pipeline. For example, the flow rate in the tubing is equal during the flow of fluid in the tubing due to the peristaltic sheets, and thus the fluid pressure in the tubing is also equal. The pressure sensor can be arranged on a pipeline below the peristaltic sheet and is used for detecting pipeline pressure when fluid flows; the pressure sensor may also be disposed at the outlet of the pipeline, which is not limited in this embodiment.

For example, when the flushing device includes a plurality of lines, a pressure sensor may be provided in each line, or a pressure sensor may be provided on the line delivering the target fluid for measuring the pressure of the line.

In some scenarios, as shown in fig. 1, in an interventional ventricular assist system, the interventional ventricular assist system includes a ventricular assist device, a controller, and an irrigation device. The ventricular assist device is implanted in a patient across an aortic valve of a heart of the patient with a proximal end of the ventricular assist device positioned in an aorta and a distal end of the ventricular assist device positioned in a left ventricle, such that blood in the left ventricle is pumped into the aorta by the ventricular assist device to provide partial or complete assist to the circulatory system of the heart. The controller and the flushing device are positioned outside the body, and the controller is used for realizing the functions of controlling and displaying data of the ventricular assist device and the flushing device, fault detection, alarm, data recording and the like.

The flushing device is connected with the ventricular assist device, so that flushing fluid flows into the aorta after entering the motor of the ventricular assist device, the motor is sealed in a fluid manner, and the phenomenon that blood enters the motor through a gap to cause motor faults is avoided. To ensure a fluid-tight effect, the pressure at the final outlet of the irrigation device delivering the irrigation fluid needs to be greater than or equal to the blood pressure. However, in the process of conveying the flushing liquid, the flushing liquid has certain viscosity, so that the flushing liquid may block a pipeline or a motor gap, or blood may block the motor gap, so that the pressure at the final outlet of the flushing liquid is reduced, and the blood enters into the motor through the gap to cause motor faults.

Based on the above, the present application proposes a control method of a flushing device, detecting whether a pipeline is abnormal in real time, when detecting that a pipeline has a blocking trend, controlling the flushing device to operate in a first mode by a controller so as to flush the pipeline by using a larger pipeline pressure and fluid flow, solving the pipeline blocking trend of the flushing device, and avoiding the blocking problem; and when the flushing device runs in the first mode for a first period of time or the target pressure when the flushing device runs in the first mode meets the preset condition, the controller controls the flushing device to run in the second mode so as to self-adaptively adjust the fluid flow according to the pressure of the pipeline, thereby ensuring the safety and stability of the fluid conveying process.

In connection with the above description, the present application is described below from the viewpoint of a method example.

Referring to fig. 2, fig. 2 is a flow chart of a control method of a flushing device according to an embodiment of the present application, which is applied to the flushing device shown in fig. 1 and fig. 2. As shown in fig. 2, the method includes the following steps.

210. The flushing device is controlled to operate in a first mode upon detection of a line anomaly of the flushing device.

When the controller detects that the pipeline is abnormal according to the pipeline outlet pressure and/or the fluid flow of the pipeline, the controller can switch the operation mode of the flushing device, so that the flushing device can automatically solve the problem of the pipeline abnormality, and the safety and the reliability of the flushing device are improved.

In the application, the flushing device sequentially comprises an adjusting stage, a stabilizing stage and a flushing stage in the running process, wherein the flow rate in the stabilizing stage is larger than that in the adjusting stage, and the pipeline outlet pressure in the flushing stage is larger than that in the stabilizing stage and the adjusting stage. The adjusting stage is that the absolute value of the flow difference of the first flow is continuously larger than a second threshold value; the stabilization stage is that the absolute value of the differential pressure of the target pressure in the preset time is continuously smaller than or equal to a first threshold value, and the absolute value of the flow difference of a first flow is continuously smaller than or equal to a second threshold value, wherein the first flow is the fluid flow of the flushing device under the target pressure; the flushing stage is that the target pressure is larger than the maximum pressure in a pressure preset range, and the first flow is stable to be a constant value.

In practical applications, when the flushing device is started to flush, the fluid flow in the pipeline of the flushing device enters the adjustment stage, the stabilization stage and the flushing stage respectively. After the flushing device is started, flushing liquid starts to be conveyed through the pipeline. The flushing device enters the adjustment phase within a certain time of the flushing device start-up. In the regulation phase, the outlet pressure of the pipeline rises rapidly, and the fluid flow rises rapidly. When the line outlet pressure rises to a certain value, it is basically stable, the line outlet pressure reaches a stable state, and the fluid flow is still gradually rising. When the fluid flow rises to a certain value and becomes stable, the flushing device enters a stable phase. The pipeline outlet pressure and the fluid flow in the stabilizing stage are both stabilized within a certain range. If the outlet pressure of the pipeline is gradually increased and the fluid flow is reduced during the operation of the flushing device, the pipeline is considered to be blocked when the fluid flow is reduced to a certain value, and the flushing device enters a flushing stage. During the flushing phase, the flushing device delivers flushing liquid at a constant fluid flow, the line outlet pressure is also gradually increased due to the blockage, which can be flushed away by the high flow and high pressure. After the blockage has been cleared, i.e. the line outlet pressure has begun to drop, the flushing device re-enters the adjustment phase, in which the line outlet pressure is stabilized at a certain value by controlling the fluid flow, after which the flushing device enters the stabilization phase when the fluid flow is stabilized at a certain value. In this way, the flushing device is kept in a stable phase during operation by switching the operating mode of the flushing device and the problem of clogging in the line is reduced or solved.

The preset time may be 5min, 6min, 8min, 10min, etc., and the first threshold and the second threshold may also be set according to an actual application scenario, which is not limited herein. For example, the target pressure during the stabilization phase may stabilize in the range of 450mmHg-550mmHg and the fluid flow may stabilize at 23 mL/h-28 mL/h, i.e., the first threshold is 100 and the second threshold is 5. For example, the target pressure during the stabilization phase may stabilize in the range of 400mmHg-600mmHg and the fluid flow may stabilize at 15 mL/h-25 mL/h, i.e., the first threshold is 200 and the second threshold is 10.

The target pressure is the pressure at the outlet of the pipeline in the flushing device, namely flushing liquid flows into the ventricular assist device from the outlet of the pipeline, and the pressure at the outlet of the pipeline can be acquired by arranging a pressure sensor at the position of the pipeline close to the outlet. For example, the pressure sensor may be positioned anywhere on the line to measure line outlet pressure when the pressure in the line is equal everywhere. Further, if the flushing device includes a plurality of lines, the target pressure may be a line outlet pressure of the line delivering the target fluid. The target fluid may be glucose and/or heparin solution delivered to the human body by the irrigation device in an interventional ventricular assist system. In other application scenarios, the target fluid may be any fluid that the user desires to deliver, which embodiments of the present application do not limit.

Optionally, the method further comprises: when the target pressure after the first time period of the stable stage is detected to be in the pressure preset range, calculating average flow in a second time period, wherein the second time period is any time period in a second time period, the second time period is later than the first time period, and the second time period is larger than the first time period.

In this application, after a first period of time after the flushing device enters the stabilization phase, an average flow of the flushing device during the stabilization phase may be calculated, which may be used to measure whether the line is abnormal. The average flow rate may be an average flow rate for a second period of time, which is a second period of time after the first period of time.

The preset pressure range can be 450mmHg-600mmHg, and the average flow can be an average flow in a period of time when the pipeline fluid flow is in a range of 5-30 mL/h. The first time period may be 10 minutes and the second time period may be 30 minutes. The first time period and the second time period may be any values that conform to the second time period being longer than the first time period, and the second time period may be 1min, 2min, 3min, etc., which is not limited in this embodiment of the present application. By calculating the average flow of the pipeline for 1min after entering the stabilization phase for 10min, the accuracy of flow control can be improved.

Optionally, the detecting the abnormal pipeline of the flushing device includes: a tendency of blockage of the line of the flushing device is detected during the stabilization phase.

The flushing liquid conveyed by the flushing device has certain viscosity, and after the flushing device runs for a period of time, the flushing liquid possibly condenses in the pipeline, or the flushing liquid is stuck or attached to the inner wall of the pipeline, the filter screen arranged in the pipeline and the motor gap, or the blood in the human body possibly condenses or sticks to the motor gap. The blocking trend may be caused in the pipeline due to the coagulation, adhesion and attachment of the flushing liquid, so that the flushing liquid in the pipeline is blocked but does not reach the blocking state, or the blocking phenomenon is caused at the gap of the motor due to the coagulation, adhesion and attachment of the blood, namely the pipeline in the abnormal state of the pipeline can also convey the flushing liquid, but the flow rate of the conveying flushing liquid is less than the flow rate of the fluid corresponding to the outlet pressure of the current pipeline.

When the fluid flow in the pipeline is in a stable state, namely after the flushing device enters a stable stage, the controller can monitor the fluid flow in the pipeline in real time so as to judge whether the pipeline has a blocking trend according to the change state of the fluid flow in the pipeline, and then when the pipeline has the blocking trend, the flushing device is controlled to operate in a first mode so as to enable the flushing device to enter a flushing stage to flush the blocking trend at the gap of the pipeline or the motor.

Further, the detecting, in the stable phase, that the line of the flushing device has a blocking tendency includes: and when the first flow is continuously smaller than the target flow in a third time period, confirming that the pipeline of the flushing device has a blocking trend, wherein the third time period is in the second time period, the target flow is k times of the average flow, and the k is larger than 0 and smaller than 1.

The flushing device can detect the current fluid flow and the pipeline outlet pressure in real time in the running process of the stable stage, and when the fluid flow is reduced to a certain value and is continuously smaller than the certain value in a certain time, if the pipeline outlet pressure does not reach the alarm preset pressure, the pipeline is considered to have a blocking trend.

The third duration is 1min, 2min, 3min, etc., which is not limited in this embodiment of the present application. When the first flow rate is detected to be reduced to half of the average flow rate in the stable phase and the duration of 1min is less than half of the average flow rate and no blocking alarm is triggered, the blocking trend is considered to exist in the current pipeline, and the flushing device is controlled to operate in the first mode to switch the flushing device from the stable phase to the flushing phase, so that the pipeline can be flushed in the flushing phase, the blocking trend in the pipeline is eliminated, and the blocking problem is avoided.

In this application, the first mode is to control the flow rate of the flushing device to be the average flow rate so that the flushing device enters the flushing phase. The controller may control the fluid flow of the flushing device to an average flow when a blockage trend in the line is detected. During the first mode of operation, the line outlet pressure increases dramatically when the fluid flow is switched from the first flow to the steady-phase average flow due to the tendency of blockage in the line. Under the flushing of high pressure and high flow, flushing liquid which can cause blocking trend due to coagulation, adhesion and the like of flushing liquid in a pipeline or at a motor gap can be flushed, or blood which can cause blocking trend due to coagulation, adhesion and the like of blood at the motor gap can be flushed, so that the problem of blocking of the pipeline can be avoided, and the safety and stability of the flushing liquid conveying process are ensured.

S220, when the flushing device is operated to the target condition, controlling the flushing device to operate in a second mode; the target condition includes at least one of: the flushing device operates in a first mode for a first period of time, and the target pressure of the flushing device in the first mode meets a preset condition; wherein the target pressure is a line outlet pressure of the flushing device, and the target pressure in the second mode is less than or equal to the target pressure in the first mode.

Wherein, the target pressure satisfies a preset condition: the target pressure is greater than or equal to an alarm threshold pressure after the first period of time, or a differential pressure of the target pressure is greater than or equal to a third threshold.

In this application, when the washing unit gets into the washing stage, the washing unit is continuous to operate for a first duration with the average flow of stable phase, after first duration, control washing unit with the second mode operation, switch back self-adaptation control mode with the washing unit, the washing unit reenters the adjustment stage promptly to avoid the long-time washing pipeline to cause the pipeline to break because of the too big pressure of bearing, influence the life of pipeline. Or, if the line outlet pressure is greater than or equal to the alarm threshold pressure during the continuous operation of the flushing device at a constant average flow rate for a first period of time, such as when the line outlet pressure rises to 1000mmHg, the flushing phase is exited in advance, the flushing device is controlled to operate in a second mode, and the flushing device is switched back to the adaptive control mode to maintain the line outlet pressure within a preset range.

The first duration may be 3min, 4min, 5min, 6min, etc., and any value satisfying the first duration being longer than the third duration may be suitable for the present application, where specific values of the first duration and the third duration are not limited.

In this application, the second mode is to control the flow of the flushing device according to the target pressure so that the flushing device enters the adjustment phase. The flushing device may enter the adjustment phase when operating in the second mode. At this stage, the controller may adjust the fluid flow rate according to the line outlet pressure so that the line outlet pressure and the fluid flow rate can be stabilized within a preset range, thereby entering a stabilization stage. According to the intelligent control system, the pipeline outlet pressure and the fluid flow are regulated in real time in the second mode, the motor can be sealed in a fluid mode, the phenomenon that blood enters into the motor through a gap to cause motor faults is avoided, and meanwhile, excessive flushing fluid can be prevented from entering into the human body, so that the safe operation of the ventricular assist device is guaranteed.

For example, in the present application, the controller may also alarm when the target pressure is greater than or equal to the alarm threshold pressure.

For example, to avoid damage to the tubing, the controller may set the number of times the flushing device enters the flushing phase during operation of the flushing device, i.e. the controller sets the number of times the flushing device continuously switches the operation mode between the first mode and the second mode. The number of times may be 4, 5, 6, 8, 10, etc., and is not limited herein.

Optionally, the controlling the flow rate of the flushing device according to the target pressure includes: when the target pressure is not equal to a preset threshold pressure, the first flow is regulated to a second flow, wherein the second flow is the corresponding fluid flow when the pipeline outlet pressure of the flushing device is equal to the preset threshold pressure; the second flow rate is regulated for a plurality of times in a third time period to obtain n third flow rates and n fourth flow rates, wherein the third flow rates are fluid flow rates corresponding to the flushing device when the pipeline outlet pressure is greater than or equal to a first preset pressure, the fourth flow rates are fluid flow rates corresponding to the flushing device when the pipeline outlet pressure is less than or equal to a second preset pressure, the first preset pressure is greater than the preset threshold pressure, and n is a positive integer; calculating a fifth flow rate based on the n third flow rates and the n fourth flow rates; maintaining the flow rate of the flushing device at the fifth flow rate.

The preset threshold pressure may be any pressure in the first preset range of the line outlet pressure of the flushing device during the steady phase, or an average value of the pressures in the first preset range. When the current pipeline outlet pressure exceeds a first preset range or is not equal to a preset threshold pressure, the flow of flushing liquid can be adjusted for multiple times according to the preset threshold pressure, and the flow can be adjusted to increase or decrease the pipeline outlet pressure on the basis of the first flow. Specifically, when the target pressure is greater than a preset threshold pressure, the flow rate of the flushing liquid can be reduced to reduce the outlet pressure of the pipeline; when the target pressure is less than the preset threshold pressure, the flow of the flushing fluid can be increased to increase the pipeline outlet pressure, so that the pipeline outlet pressure can be kept at a pressure within a first preset range under the condition that the flow of the flushing fluid is unchanged, and the pressure barrier between the blood and the motor in the ventricular assist device is ensured to be kept stable.

In the process of adjusting the pipeline outlet pressure to the preset threshold pressure, the pipeline outlet pressure and the flushing fluid flow are mutually influenced, so that the process of adjusting the pipeline outlet pressure to the preset threshold pressure is a dynamic change process, and the pipeline outlet pressure cannot be kept stable only by directly increasing the flushing fluid flow in a short time. The first preset pressure and the second preset pressure are within a first preset range.

The present application maintains the line outlet pressure near the preset threshold pressure by calculating an average of the flow of rinse liquid as the line outlet pressure fluctuation is continuously varied over the first period of time. The method comprises the following steps: when the target pressure is higher than the preset threshold pressure, gradually reducing the acceleration of the flushing fluid flow (namely slowly increasing the flushing fluid flow) when the first flow is increased to the second flow, wherein the input flushing fluid flow is still higher than the output flushing fluid flow in the process, and the pipeline outlet pressure is still continuously increased; when the outlet pressure of the pipeline is increased to a first preset pressure, the corresponding flushing fluid flow is recorded as a third flow; then gradually reducing the flow rate of the flushing liquid from the third flow rate until the pressure at the outlet of the pipeline is reduced to a second preset pressure, and recording the corresponding flow rate of the flushing liquid as a fourth flow rate; and then gradually increasing the flow of the flushing liquid from the fourth flow to increase the pressure at the outlet of the pipeline to the first preset pressure, and then continuously reducing and increasing the flow of the flushing liquid according to the mode until the duration reaches the first time period, so that n third flows and n fourth flows which are recorded are obtained. And further calculating a fifth flow rate according to the third flow rate and the fourth flow rate, wherein the fifth flow rate may be an average flow rate of the n third flow rates and the n fourth flow rates, or may be any third flow rate or fourth flow rate of which a difference value between the third flow rate and the fourth flow rate is smaller than a set value. The flow rate of the flushing device is then maintained at a fifth flow rate so that the flushing device enters a steady phase.

For example, the calculating a fifth flow based on the n third flows and the n fourth flows includes: drawing a curve for regulating the flow of rinse liquid from the second flow rate to the n third flow rates and the n fourth flow rates over the first time period; integrating the curve to obtain an area surrounded by the curve and the coordinate axis; and calculating the ratio of the area to the first time period to obtain the fifth flow.

Specifically, during the process of adjusting the flow rate of the flushing liquid in the first time period, the flow rate of the flushing liquid is mapped into a coordinate system in real time to form a flushing liquid flow curve v (t) related to time, wherein the abscissa of the coordinate system is time, and the ordinate is the flow rate of the flushing liquid. The curve is then integrated

And calculating the area surrounded by the curve, the abscissa and the ordinate, and further calculating the average area in the first time period, so as to obtain the fifth flow.

It can be seen that the present application proposes a control method of a flushing device, detecting in real time whether a pipeline is abnormal, when a pipeline blockage is detected in a stable stage, a controller controlling the flushing device to operate in a first mode, so as to flush the blockage by using a larger pipeline pressure and fluid flow, and solving a pipeline blockage trend of the flushing device; and when the flushing device runs in the first mode for a first period of time or the target pressure when the flushing device runs in the first mode meets the preset condition, the controller controls the flushing device to run in the second mode so as to self-adaptively adjust the fluid flow according to the pressure of the pipeline, thereby ensuring the safety and stability of the fluid conveying process.

The foregoing description of the embodiments of the present application has been presented primarily in terms of a method-side implementation. It will be appreciated that the network device, in order to implement the above-described functions, includes corresponding hardware structures and/or software modules that perform the respective functions. Those of skill in the art will readily appreciate that the elements and algorithm steps described in connection with the embodiments disclosed herein may be embodied as hardware or a combination of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

Referring to fig. 3, fig. 3 is a functional unit block diagram of a control device of a flushing device according to an embodiment of the present application, where the device 300 is applied to an electronic apparatus, and the device 300 includes: a control unit 310, a calculation unit 320 and a detection unit 330.

A control unit 310 for controlling the flushing device to operate in a first mode when a pipe abnormality of the flushing device is detected;

The control unit 310 is further configured to control the flushing device to operate in a second mode when the flushing device is operated to a target condition; the target condition includes at least one of: the flushing device operates in the first mode for a first period of time, and the target pressure of the flushing device in the first mode meets a preset condition;

Optionally, the flushing device sequentially comprises an adjustment stage, a stabilization stage and a flushing stage in the operation process, wherein the flow rate in the stabilization stage is greater than that in the adjustment stage, and the pipeline outlet pressure in the flushing stage is greater than that in the stabilization stage and the adjustment stage.

Optionally, in detecting an abnormality of the pipeline of the flushing device, the control unit 310 is specifically configured to: a tendency of blockage of the line of the flushing device is detected during the stabilization phase.

Optionally, the steady phase is that the absolute value of the differential pressure of the target pressure within a preset time is continuously smaller than or equal to a first threshold value, and the absolute value of the differential flow of a first flow is continuously smaller than or equal to a second threshold value, and the first flow is the fluid flow of the flushing device under the target pressure.

The calculating unit 320 is configured to calculate, when the target pressure after the first period of time is detected to be within a preset pressure range, an average flow in a second period of time, where the second period of time is any period of time in a second period of time, the second period of time is later than the first period of time, and the second period of time is greater than the first period of time.

Optionally, in the aspect that the blocking trend of the pipeline of the flushing device is detected in the stable phase, the detection unit 330 is configured to confirm that the blocking trend exists in the pipeline of the flushing device when the first flow is continuously smaller than the target flow in a third period, where the third period is in the second period, the target flow is k times of the average flow, and the k is greater than 0 and smaller than 1.

Optionally, the adjusting stage is that the absolute value of the flow difference of the first flow is continuously greater than the second threshold; the flushing stage is that the target pressure is larger than the maximum pressure in the pressure preset range, and the first flow is stable to be a constant value.

Optionally, the pressure preset range is 450mmHg to 600mmHg.

Optionally, the target pressure satisfies a preset condition: the target pressure is greater than or equal to an alarm threshold pressure after the first period of time, or a differential pressure of the target pressure is greater than or equal to a third threshold.

Optionally, the first mode is to control the flow rate of the flushing device to be the average flow rate, so that the flushing device enters the flushing stage.

Optionally, the second mode is to control the flow rate of the flushing device according to the target pressure so as to make the flushing device enter the adjustment stage.

In terms of controlling the flow rate of the flushing device according to the target pressure, the control unit 310 is specifically configured to: when the target pressure is not equal to a preset threshold pressure, the first flow is regulated to a second flow, wherein the second flow is the corresponding fluid flow when the pipeline outlet pressure of the flushing device is equal to the preset threshold pressure; the second flow rate is regulated for a plurality of times in a third time period to obtain n third flow rates and n fourth flow rates, wherein the third flow rates are fluid flow rates corresponding to the flushing device when the pipeline outlet pressure is greater than or equal to a first preset pressure, the fourth flow rates are fluid flow rates corresponding to the flushing device when the pipeline outlet pressure is less than or equal to a second preset pressure, the first preset pressure is greater than the preset threshold pressure, and n is a positive integer; calculating a fifth flow rate based on the n third flow rates and the n fourth flow rates; maintaining the flow rate of the flushing device at the fifth flow rate.

It should be appreciated that the apparatus 300 herein is embodied in the form of functional units. The term "unit" herein may refer to an application specific integrated circuit (application specific integrated circuit, ASIC), an electronic circuit, a processor (e.g., a shared, dedicated, or group processor, etc.) and memory that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable components that support the described functionality. In an alternative example, it will be understood by those skilled in the art that the apparatus 300 may be specifically an electronic device in the foregoing embodiment, and the apparatus 300 may be configured to perform each flow and/or step corresponding to the electronic device in the foregoing method embodiment, which is not described herein for avoiding repetition.

The apparatus 300 of each of the above embodiments has a function of implementing the corresponding steps executed by the electronic device in the above method; the functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software comprises one or more modules corresponding to the functions; for example, the control unit 310 may be replaced by a processor, and perform the transceiving operations and the related processing operations in the respective method embodiments, respectively.

In the embodiments of the present application, the apparatus 300 may also be a chip or a chip system, for example: system on chip (SoC). Correspondingly, the transceiver unit may be a transceiver circuit of the chip, which is not limited herein.

Referring to fig. 4, fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present application, where the electronic device includes: one or more processors, one or more memories, one or more communication interfaces, and one or more programs; the one or more programs are stored in the memory and configured to be executed by the one or more processors.

The program includes instructions for performing the steps of:

All relevant contents of each scenario related to the above method embodiment may be cited to the functional description of the corresponding functional module, which is not described herein.

It should be appreciated that the memory described above may include read only memory and random access memory and provide instructions and data to the processor. A portion of the memory may also include non-volatile random access memory. For example, the memory may also store information of the device type.

In an embodiment of the present application, the processor of the above apparatus may be a central processing unit (Central Processing Unit, CPU), which may also be other general purpose processors, digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It should be understood that references to "at least one" in embodiments of the present application mean one or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a alone, a and B together, and B alone, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b, or c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or plural.

And, unless specified to the contrary, the embodiments of the present application refer to the ordinal terms "first," "second," etc., as used to distinguish between multiple objects, and are not to be construed as limiting the order, timing, priority, or importance of the multiple objects. For example, the first information and the second information are only for distinguishing different information, and are not indicative of the difference in content, priority, transmission order, importance, or the like of the two information.

In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or by instructions in the form of software. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in a hardware processor for execution, or in a combination of hardware and software elements in the processor for execution. The software elements may be located in a random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor executes instructions in the memory to perform the steps of the method described above in conjunction with its hardware. To avoid repetition, a detailed description is not provided herein.

The present application also provides a computer storage medium storing a computer program for electronic data exchange, the computer program causing a computer to execute some or all of the steps of any one of the methods described in the method embodiments above.

Embodiments of the present application also provide a computer program product comprising a non-transitory computer-readable storage medium storing a computer program operable to cause a computer to perform some or all of the steps of any one of the methods described in the method embodiments above. The computer program product may be a software installation package.

It should be noted that, for simplicity of description, the foregoing method embodiments are all expressed as a series of action combinations, but it should be understood by those skilled in the art that the present application is not limited by the order of actions described, as some steps may be performed in other order or simultaneously in accordance with the present application. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all preferred embodiments, and that the acts and modules referred to are not necessarily required in the present application.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and the division of elements, such as those described above, is merely a logical function division, and may be implemented in other manners, such as multiple elements or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, or may be in electrical or other forms.

The units described above as separate components may or may not be physically separate, and components shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purposes of the embodiments of the present application.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units described above, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable memory. Based on such understanding, the technical solution of the present application may be embodied essentially or in part or all of the technical solution contributing to the prior art or in the form of a software product stored in a memory, comprising several instructions for causing a computer device (which may be a personal computer, a server or TRP, etc.) to perform all or part of the steps of the methods of the various embodiments of the present application. And the aforementioned memory includes: a U-disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.

Those of ordinary skill in the art will appreciate that all or a portion of the steps in the various methods of the above embodiments may be implemented by a program that instructs associated hardware, and the program may be stored in a computer readable memory, which may include: flash disk, ROM, RAM, magnetic or optical disk, etc.

The foregoing has outlined rather broadly the more detailed description of embodiments of the present application, wherein specific examples are provided herein to illustrate the principles and embodiments of the present application, the above examples being provided solely to assist in the understanding of the methods of the present application and the core ideas thereof; meanwhile, as those skilled in the art will have modifications in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.

Claims

1. A control method of a flushing device, characterized by being applied to a ventricular assist system, the ventricular assist system comprising the flushing device and a ventricular assist device, the flushing device being connected to the ventricular assist device, the flushing device being for delivering flushing liquid to a motor of the ventricular assist device to fluidly seal the motor; the method comprises the following steps:

When the pipeline of the flushing device is detected to have a blocking trend in the stable stage, controlling the flushing device to operate in a first mode so as to enable the flushing device to enter a flushing stage;

when the flushing device is operated to a target condition, controlling the flushing device to operate in a second mode, wherein the second mode is to control the flow rate of the flushing device according to target pressure so as to enable the flushing device to enter an adjustment stage;

the target condition includes at least one of: the flushing device operates in the first mode for a first period of time, the target pressure when the flushing device operates in the first mode meets preset conditions, and the target pressure meets the preset conditions: after the first period of time, the target pressure is greater than or equal to an alarm threshold pressure, or a differential pressure of the target pressure is greater than or equal to a third threshold;

wherein the target pressure is a line outlet pressure of the flushing device, the target pressure in the second mode being less than or equal to the target pressure in the first mode;

the flushing device sequentially comprises the adjusting stage, the stabilizing stage and the flushing stage in the running process, wherein the flushing stage is that the target pressure is larger than the maximum pressure in the preset pressure range, the first flow is stable to be a constant value, and the first flow is the fluid flow of the flushing device under the target pressure; the adjustment stage is that the absolute value of the flow difference of the first flow is continuously larger than a second threshold value.

2. The method of claim 1, wherein the flow rate at the steady stage is greater than the flow rate at the regulated stage, and the line outlet pressure at the flush stage is greater than the line outlet pressures at the steady stage and the regulated stage.

3. The method of claim 2, wherein the steady-state phase is a differential pressure absolute value of the target pressure for a preset time being less than or equal to a first threshold value and a differential flow absolute value of the first flow being less than or equal to a second threshold value;

the method further comprises the steps of:

when the target pressure after the first time period of entering the stable stage is detected to be in the pressure preset range, calculating average flow in a second time period, wherein the second time period is any time period in a second time period, the second time period is later than the first time period, and the second time period is larger than the first time period.

4. A method according to claim 3, wherein said detecting a tendency for clogging of the line of the flushing device during the steady phase comprises:

and when the first flow is continuously smaller than the target flow in a third time period, confirming that the blocking trend exists in the pipeline of the flushing device, wherein the third time period is in the second time period, the target flow is k times of the average flow, and the k is larger than 0 and smaller than 1.

5. The method of any one of claims 1-4, wherein the pressure preset range is 450mmHg to 600mmHg.

6. The method of claim 3 or 4, wherein the first mode is to control the flow rate of the flushing device to the average flow rate to cause the flushing device to enter the flushing phase.

7. The method of claim 1, wherein said controlling the flow of the flushing device in accordance with the target pressure comprises:

when the target pressure is not equal to a preset threshold pressure, the first flow is regulated to a second flow, wherein the second flow is the corresponding fluid flow when the pipeline outlet pressure of the flushing device is equal to the preset threshold pressure;

the second flow rate is regulated for a plurality of times in a third time period to obtain n third flow rates and n fourth flow rates, wherein the third flow rates are fluid flow rates corresponding to the flushing device when the pipeline outlet pressure is greater than or equal to a first preset pressure, the fourth flow rates are fluid flow rates corresponding to the flushing device when the pipeline outlet pressure is less than or equal to a second preset pressure, the first preset pressure is greater than the preset threshold pressure, and n is a positive integer;

Calculating a fifth flow rate based on the n third flow rates and the n fourth flow rates;

maintaining the flow rate of the flushing device at the fifth flow rate.

8. A control device of a flushing device, characterized in that the device comprises a control unit for performing the steps of the method according to any one of claims 1-7.

9. An electronic device comprising a processor, a memory, and a communication interface, the memory storing one or more programs, and the one or more programs being executed by the processor, the one or more programs comprising instructions for performing the steps of the method of any of claims 1-7.

10. A computer readable storage medium storing a computer program for electronic data exchange, wherein the computer program causes a computer to perform the steps of the method according to any one of claims 1-7.