Flushing system based on ventricular catheter pump and flushing pressure control method

Abstract

The embodiment of the invention provides a flushing system based on a ventricular catheter pump and a flushing pressure control method, and relates to the technical field of medical instruments and flushing control equipment, the flushing system comprises a data acquisition module used for acquiring the flushing pressure and the flushing flow of flushing fluid injected to the ventricular catheter pump by flushing equipment; the parameter determining module is used for determining grade parameter values of area size grade parameter items on the basis of the flushing pressure and the flushing flow, and the area size grade parameter items represent the area size degree of the preset gap area; the amplitude determination module is used for determining the pressure adjustment amplitude of the flushing pressure threshold value based on the grade parameter value; and the flushing control module is used for updating the flushing pressure threshold value based on the pressure adjustment amplitude and controlling the flushing equipment according to the adjusted flushing pressure threshold value. By applying the scheme provided by the embodiment of the invention, intelligent self-adaptive control of the flushing pressure can be realized.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a flushing system based on a ventricular catheter pump and a flushing pressure control method. Background Art

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

[0003] The ventricular catheter pump is also connected to a flushing system, which is used to inject flushing fluid into the environment area where the drive component in the ventricular catheter pump is located. The flushing pressure of the flushing fluid counteracts the blood pressure entering the drive component, thereby preventing blood from entering the drive component and causing subsequent thrombosis, pump failure and other medical accidents. At present, how to achieve adaptive control of flushing pressure has become an urgent problem to be solved. Summary of the invention

[0004] The purpose of the embodiment of the present application is to provide a flushing system based on a ventricular catheter pump and a flushing pressure control method to achieve intelligent adaptive control of flushing pressure. The specific technical solution is as follows: In a first aspect, an embodiment of the present application provides a flushing system based on a ventricular catheter pump, the flushing system comprising a flushing control device and a flushing device, the flushing control device is connected to the flushing device, and the flushing device is connected to the ventricular catheter pump, wherein: The flushing device is used to inject flushing fluid into the ventricular catheter pump through a preset gap area of ​​the ventricular catheter pump; The flushing control device comprises: A data acquisition module, used for obtaining the flushing pressure and flushing flow rate of the flushing fluid injected by the flushing device into the ventricular catheter pump; A parameter determination module, used to determine a grade parameter value of an area size grade parameter item based on the flushing pressure and the flushing flow rate, wherein the area size grade parameter item represents the area size degree of the preset gap area; an amplitude determination module, for determining a pressure adjustment amplitude of a flushing pressure threshold based on the level parameter value; The flushing control module is used to update the flushing pressure threshold based on the pressure adjustment amplitude, and control the flushing device according to the adjusted flushing pressure threshold.

[0005] In one embodiment of the present application, the parameter determination module includes: A flow determination submodule, used to determine an expected range of flushing flow that matches the flushing pressure, and to determine whether the flushing flow is within the expected range of flushing flow, and if not, trigger a first parameter determination submodule; The first parameter determination submodule is used to calculate the flow difference between the flushing flow and the boundary value of the expected range of the flushing flow, and determine the level parameter value of the area size level parameter item based on the calculated flow difference.

[0006] In one embodiment of the present application, the above parameter determination module further includes a second parameter determination submodule, wherein: The flow rate determination submodule is specifically configured to trigger the second parameter determination submodule when determining that the flushing flow rate is within the expected flushing flow rate range; The second parameter determination submodule is used to determine a preset standard parameter value as a level parameter value of the region size level parameter item.

[0007] In one embodiment of the present application, the amplitude determination module includes: A range determination submodule, used to determine the pressure adjustment amplitude range corresponding to the level parameter value; The amplitude determination submodule is used to determine a target amplitude within the pressure adjustment amplitude range as the pressure adjustment amplitude of the flushing pressure threshold based on the flow difference between the flushing flow and the boundary value of the flushing flow range.

[0008] In one embodiment of the present application, the above-mentioned flushing pressure represents the flushing pressure fluctuation information of the flushing liquid injected by the flushing device, and the flushing flow represents the flushing flow fluctuation information of the flushing liquid injected by the flushing device; the parameter determination module is specifically used to calculate the pressure change rate of the flushing pressure, and calculate the flow change rate of the flushing flow; calculate the correlation between the pressure change rate and the flow change rate, and determine the level parameter value of the area size level parameter item corresponding to the correlation.

[0009] In a second aspect, an embodiment of the present application provides a flushing pressure control method, which is applied to a flushing control device in a flushing system, wherein the flushing system further comprises a flushing device, wherein the flushing control device is connected to the flushing device, wherein the flushing device is connected to a ventricular catheter pump, and wherein the flushing device is used to inject flushing liquid into the ventricular catheter pump through a preset gap area of ​​the ventricular catheter pump; the method comprises: Obtaining the flushing pressure and flushing flow rate of the flushing fluid injected by the flushing device into the ventricular catheter pump; Based on the flushing pressure and flushing flow rate, determining a grade parameter value of an area size grade parameter item, wherein the area size grade parameter item represents the area size degree of the preset gap area; determining a pressure adjustment amplitude of a flushing pressure threshold based on the level parameter value; Based on the pressure adjustment amplitude, the flushing pressure threshold is updated, and the flushing device is controlled according to the adjusted flushing pressure threshold.

[0010] In one embodiment of the present application, the level parameter value of the area size level parameter item is determined based on the flushing pressure and flushing flow rate, including: Determine an expected range of flushing flow rate that matches the flushing pressure, and judge whether the flushing flow rate is within the expected range of flushing flow rate; If not, the flow difference between the flushing flow rate and the boundary value of the expected range of the flushing flow rate is calculated, and the level parameter value of the area size level parameter item is determined based on the calculated flow difference.

[0011] In one embodiment of the present application, if the flushing flow rate is within the expected flushing flow rate range, the method further includes: determining a preset standard parameter value as the grade parameter value of the area size grade parameter item.

[0012] In one embodiment of the present application, the pressure adjustment amplitude of the flushing pressure threshold is determined based on the level parameter value, including: Determine the pressure adjustment amplitude range corresponding to the level parameter value; Based on the flow difference between the flushing flow rate and the boundary value of the flushing flow rate range, a target amplitude within the pressure adjustment amplitude range is determined as the pressure adjustment amplitude of the flushing pressure threshold.

[0013] In one embodiment of the present application, the flushing pressure represents the flushing pressure fluctuation information of the flushing liquid injected by the flushing device, and the flushing flow represents the flushing flow fluctuation information of the flushing liquid injected by the flushing device; the level parameter value of the area size level parameter item is determined based on the flushing pressure and the flushing flow, including: Calculate the pressure change rate of the flushing pressure and calculate the flow change rate of the flushing flow; The correlation between the pressure change rate and the flow change rate is calculated, and the level parameter value of the area size level parameter item corresponding to the correlation is determined.

[0014] From the above, it can be seen that, by using the flushing system provided in the embodiment of the present application, the level parameter value of the preset gap area is determined by the flushing pressure and the flushing flow, and then the flushing pressure threshold is updated based on the level parameter value of the preset gap area, and then the flushing device is controlled based on the updated flushing pressure threshold; it can be seen that this embodiment takes into account the specific characteristics of the ventricular catheter pump, that is, the area size of the preset gap area through which the flushing liquid passes, so that the control of the flushing device is adaptive to the characteristics of the ventricular catheter pump to achieve adaptive control of the flushing device.

[0015] Furthermore, the level parameter value of the preset gap area size is determined based on the flushing pressure and flushing flow of the flushing liquid. The flushing pressure and flow can reflect the characteristics of the flushing liquid being affected by the preset gap area. Therefore, through the flushing pressure and flow, the parameter value of the preset gap area size can be accurately determined, thereby achieving more precise adaptive control of the flushing equipment.

[0016] Of course, implementing any product or method of the present application does not necessarily require achieving all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other embodiments can also be obtained based on these drawings.

[0018] Figure 1 A schematic diagram of an application scenario of an embodiment of the present application; Figure 2 A schematic structural diagram of a first ventricular catheter pump-based flushing system provided in an embodiment of the present application; Figure 3 A schematic structural diagram of a second ventricular catheter pump-based flushing system provided in an embodiment of the present application; Figure 4 A schematic structural diagram of a third ventricular catheter pump-based flushing system provided in an embodiment of the present application; Figure 5 A flow chart of a flushing pressure control method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field based on the present application belong to the scope of protection of the present application.

[0020] Before introducing the embodiments of the present application, Figure 1 The application scenario of this application is described.

[0021] Figure 1 The invention comprises a ventricular catheter pump 101 and a flushing system 102, wherein the flushing system 102 comprises a flushing control device 1021 and a flushing device 1022. The flushing control device 1021 is connected to the flushing device 1022, and the flushing device 1022 is connected to the ventricular catheter pump 101 through a flushing pipeline.

[0022] The ventricular catheter pump 101 is a device for assisting the patient's heart in pumping blood. The ventricular catheter pump 101 rotates at a high speed to assist the blood in the ventricle to be pumped into the artery. The ventricular catheter pump 101 can be a left ventricular catheter pump or a right ventricular catheter pump.

[0023] When the ventricular catheter pump 101 is running in the patient's body, blood may enter the driving component of the ventricular catheter pump 101, such as the motor, thereby causing a series of medical safety accidents such as subsequent thrombosis and pump failure. To avoid such accidents, a common measure is to generate a flushing fluid in the opposite direction of the blood flow outside the driving component through the flushing system 102, and the flushing pressure of the flushing fluid is greater than the blood pressure, thereby preventing blood from flowing into the driving component.

[0024] The flushing control device 1021 is used to control the flushing device 1022 , such as controlling the start and stop of the flushing device 1022 , and controlling the flushing pressure and flushing flow rate of the flushing device 1022 .

[0025] The flushing device 1022 can inject flushing liquid into the ventricular catheter pump 101 through a preset gap area of ​​the ventricular catheter pump 101. The preset gap area can be a gap area between the drive assembly and the drive shaft of the ventricular catheter pump 101, and the drive shaft is the shaft connecting the drive assembly and the pumping assembly of the ventricular catheter pump. The flushing device injects flushing liquid outside the drive assembly through the gap area to form a pressure barrier to resist blood and prevent blood from entering the drive assembly.

[0026] In the prior art, the flushing pressure of the flushing device is usually fixed, that is, for any ventricular catheter pump, the flushing pressure injected by the flushing device into the ventricular catheter pump is the same. However, the flushing device control method using a fixed flushing pressure cannot adapt to different ventricular catheter pumps.

[0027] See also Figure 2 , Figure 2 The present invention provides a schematic structural diagram of a first ventricular catheter pump-based flushing system according to an embodiment of the present application, wherein the flushing system includes a flushing device and a flushing control device.

[0028] The flushing device 201 is used to inject flushing fluid into the ventricular catheter pump through a preset gap area of ​​the ventricular catheter pump.

[0029] Washdown control equipment, including: The data acquisition module 202 is used to obtain the flushing pressure and flushing flow rate of the flushing fluid injected by the flushing device into the ventricular catheter pump.

[0030] After the flushing device starts running, it can collect flushing pressure and flushing flow at intervals and store the collected data in the memory. Based on this, the data acquisition module can read the above flushing pressure and flushing flow from the memory.

[0031] The flushing pressure may be acquired by a pressure sensor, and the pressure sensor may be integrated in the pipeline between the flushing device and the ventricular catheter pump.

[0032] The flushing flow rate can be collected by a flow meter. When the driving component of the flushing device is a stepper motor, the flushing flow rate of the flushing liquid can be calculated in real time by using the corresponding relationship between the forward distance of the stepper motor and the flushing flow rate.

[0033] The parameter determination module 203 is used to determine the grade parameter value of the area size grade parameter item based on the flushing pressure and the flushing flow rate.

[0034] The region size level parameter item represents the region size degree of the preset gap region. The level parameter value is the specific data of the region size degree of the preset gap region, and is expressed in the form of a level. When the level parameter value is higher, it can represent a larger or smaller region size degree.

[0035] The first implementation method for determining the grade parameter value is: inputting the flushing pressure and flushing flow into a preset grade prediction model to obtain the grade parameter value output by the grade prediction model.

[0036] The above-mentioned grade prediction model is a parameter value for predicting the size of the gap area obtained by training the initial neural network model using the flushing pressure and flushing flow of the sample flushing system as training samples and the actual grade parameters of the sample gap area size as training benchmarks. The above-mentioned sample gap area is the area where the sample flushing system injects flushing liquid into the sample ventricular catheter pump.

[0037] The second implementation method for determining the grade parameter value is: when the flushing pressure represents the flushing pressure fluctuation information of the flushing liquid injected by the flushing equipment, and the flushing flow represents the flushing flow fluctuation information of the flushing liquid injected by the flushing equipment, the pressure change rate of the flushing pressure can be calculated, and the flow change rate of the flushing flow can be calculated; the correlation between the pressure change rate and the flow change rate is calculated, and the grade parameter value of the area size grade parameter item corresponding to the correlation is determined.

[0038] In this embodiment, the flushing pressure is the fluctuation information of the flushing pressure, and the flushing flow rate is the fluctuation information of the flushing flow rate. In this case, the pressure change rate of the flushing pressure and the flow change rate of the flushing flow rate can be calculated. Specifically, the pressure change rate of the flushing pressure and the flow change rate of the flushing flow rate within a preset time period can be calculated.

[0039] The correlation represents the correlation between the pressure change rate and the flow change rate. When the correlation is larger, the correlation between the pressure change rate and the flow change rate is higher; when the correlation is smaller, the correlation between the pressure change rate and the flow change rate is lower. The correlation can be calculated by any method in the prior art.

[0040] After the correlation is calculated, the level value corresponding to the current correlation can be determined according to the preset corresponding relationship between the correlation and the level value as the level parameter value.

[0041] It can be seen that since the level parameter value is determined based on the correlation, the correlation reflects the correlation between the changes in flushing pressure and flushing flow, and since the changing characteristics of the flushing pressure and the changing characteristics of the flushing flow are affected by the size of the gap area, the above-mentioned correlation can accurately reflect the size of the gap area, thereby improving the accuracy of determining the level parameter value.

[0042] The amplitude determination module 204 is used to determine the pressure adjustment amplitude of the flushing pressure threshold based on the level parameter value.

[0043] The above-mentioned flushing pressure threshold refers to the limit value of the flushing fluid injected by the flushing device into the ventricular catheter pump. During the control process of the flushing device, the flushing pressure of the flushing fluid cannot exceed the flushing pressure threshold. Once the current flushing pressure exceeds the flushing pressure threshold, the operation of the flushing device must be stopped immediately until the current flushing pressure is less than the flushing pressure threshold, and the operation of the flushing device is started. It can be seen that the flushing pressure threshold is also used as a basis for judging whether the flushing device should stop running.

[0044] One implementation method of determining the pressure adjustment range is to determine the difference between the level parameter value and the standard level parameter value, and determine the pressure adjustment range corresponding to the level parameter value based on the corresponding relationship between the difference value and the pressure change value.

[0045] The above-mentioned standard level parameter value is the level parameter value corresponding to the flushing pressure threshold. When the flushing pressure threshold is pre-set, the standard level parameter value is pre-set; when the flushing pressure threshold is updated according to the above-mentioned modules included in the flushing control device, then the standard level parameter value is the level parameter value determined by the last update of the flushing pressure threshold.

[0046] According to the correspondence between the preset level value and the pressure change value, the pressure adjustment amplitude corresponding to the level parameter value is determined.

[0047] Other implementations for determining the pressure adjustment range can be found in subsequent embodiments and will not be described in detail here.

[0048] The flushing control module 205 is used to update the flushing pressure threshold based on the pressure adjustment amplitude, and control the flushing device according to the adjusted flushing pressure threshold.

[0049] One implementation of updating the flushing pressure threshold is: calculating the sum of the flushing pressure threshold and the pressure adjustment amplitude as the adjusted flushing pressure.

[0050] The flushing device includes a flushing motor and a flushing cavity. When the flushing control module controls the flushing device according to the adjusted flushing pressure threshold, the flushing motor drives the cavity axis of the flushing cavity to squeeze or expand the volume of the flushing liquid in the flushing cavity. When the volume of the flushing liquid in the flushing cavity is squeezed, the flushing liquid pressure increases, and the flushing liquid is injected into the ventricular catheter pump through the preset gap area; when the squeezing reaches a certain level, the flushing control module detects that the flushing pressure exceeds the flushing pressure threshold and immediately stops the flushing motor. At this time, although the flushing liquid is not squeezed, it is still injected into the ventricular catheter pump from the preset gap, the flushing volume is reduced, and the flushing pressure is also reduced. The flushing control module detects that the flushing pressure is lower than the flushing pressure threshold, turns on the flushing motor, and continues to squeeze the volume of the flushing liquid in the flushing cavity, and repeats this cycle. It can be seen that as the flushing pressure threshold is adjusted, the flushing pressure is also adjusted accordingly.

[0051] As can be seen from the above, the flushing system provided in this embodiment is used to determine the level parameter value of the preset gap area through the flushing pressure and the flushing flow, and then update the flushing pressure threshold based on the level parameter value of the preset gap area, and then control the flushing device based on the updated flushing pressure threshold; it can be seen that this embodiment takes into account the specific characteristics of the ventricular catheter pump, that is, the area size of the preset gap area through which the flushing liquid passes, so that the control of the flushing device is adaptive to the characteristics of the ventricular catheter pump to achieve adaptive control of the flushing device.

[0052] Furthermore, the level parameter value of the preset gap area size is determined based on the flushing pressure and flushing flow of the flushing liquid. The flushing pressure and flow can reflect the characteristics of the flushing liquid being affected by the preset gap area. Therefore, through the flushing pressure and flow, the parameter value of the preset gap area size can be accurately determined, thereby achieving more precise adaptive control of the flushing equipment.

[0053] In the aforementioned Figure 2 In the corresponding embodiment, the parameter determination module 203 may include the following 303-304. Based on this, see Figure 3 , Figure 3 This is a schematic structural diagram of a second ventricular catheter pump-based flushing system provided in an embodiment of the present application. The system includes the following 301-306.

[0054] The flushing device 301 is used to inject flushing liquid into the ventricular catheter pump through a preset gap area of ​​the ventricular catheter pump.

[0055] Washdown control equipment, including: The data acquisition module 302 is used to obtain the flushing pressure and flushing flow rate of the flushing fluid injected by the flushing device into the ventricular catheter pump.

[0056] The flow determination submodule 303 is used to determine the expected range of flushing flow that matches the flushing pressure, and to determine whether the flushing flow is within the expected range of flushing flow. If not, the first parameter determination submodule 304 is triggered.

[0057] Determining the expected range of flushing flow rate can be understood as: the range of the expected flushing flow rate under the above flushing pressure. One implementation method of determining the expected range of flushing flow rate is: according to the correspondence between the preset flushing pressure and the flushing flow rate range, the flushing flow rate range corresponding to the flushing pressure is determined as the expected range of flushing flow rate.

[0058] When the flushing flow rate is not within the expected flushing flow rate range, the first parameter determination submodule 304 is triggered.

[0059] The first parameter determination submodule 304 is used to calculate the flow difference between the flushing flow and the boundary value of the expected range of the flushing flow, and determine the level parameter value of the area size level parameter item based on the calculated flow difference.

[0060] The flow difference represents the gap between the flushing flow and the expected range of the flushing flow. The boundary values ​​of the above-mentioned expected range of flushing flow are the maximum and minimum values ​​of the expected range of flushing flow. One implementation method for calculating the flow difference is: if the flushing flow is greater than the maximum value of the expected range of flushing flow, calculate the flow difference between the flushing flow and the maximum value; if the flushing flow is less than the minimum value of the expected range of flushing flow, calculate the flow difference between the flushing flow and the minimum value.

[0061] The above flow difference reflects the gap between the flushing flow and the expected range of the flushing flow. When the flow difference is larger, it means that the current flushing flow deviates further from the expected range of the flushing flow. When the flow difference is smaller, it means that the current flushing flow deviates closer to the expected range of the flushing flow.

[0062] One implementation method of determining the level parameter value based on the flow difference is: calculating the ratio between the flow difference and the preset standard unit, and converting the calculated ratio into the level parameter value. For example, if the calculated flow difference is 10, the preset standard unit is 2, and the ratio is 5, 5 is converted into the corresponding level parameter value according to the corresponding relationship between the preset ratio and the level value.

[0063] It can be seen that in this embodiment, the size relationship and gap between the expected range of flushing flow that matches the flushing flow and the flushing pressure can accurately reflect the deviation relationship between the flushing flow and the current flushing pressure. The above deviation relationship can accurately reflect the area size of the preset gap area, thereby improving the accuracy of determining the grade parameter value.

[0064] When the flushing flow rate is within the expected flushing flow rate range, in one embodiment of the present application, the second parameter determination submodule is triggered.

[0065] The second parameter determination submodule is used to determine the preset standard parameter value as the grade parameter value of the regional size grade parameter item. Since the flushing flow rate is within the expected flushing flow rate range, it can be said that the deviation between the flushing flow rate and the flushing pressure is within the allowable deviation range. In this case, the preset standard parameter value is directly determined as the grade parameter value, which improves the efficiency of data determination.

[0066] The amplitude determination module 305 is used to determine the pressure adjustment amplitude of the flushing pressure threshold based on the level parameter value.

[0067] The flushing control module 306 is used to update the flushing pressure threshold based on the pressure adjustment amplitude, and control the flushing device according to the adjusted flushing pressure threshold.

[0068] In the aforementioned Figure 3 In the corresponding embodiment, the amplitude determination module may include the following 405-406. Based on this, see Figure 4 , Figure 4 A schematic structural diagram of a third ventricular catheter pump-based flushing system provided in an embodiment of the present application, the system includes the following 401-407.

[0069] The flushing device 401 is used to inject flushing fluid into the ventricular catheter pump through a preset gap area of ​​the ventricular catheter pump.

[0070] Washdown control equipment, including: The data acquisition module 402 is used to obtain the flushing pressure and flushing flow rate of the flushing fluid injected by the flushing device into the ventricular catheter pump; The flow rate determination submodule 403 is used to determine the expected range of flushing flow rate that matches the flushing pressure, and to determine whether the flushing flow rate is within the expected range of flushing flow rate. If not, the first parameter determination submodule is triggered; The first parameter determination submodule 404 is used to calculate the flow difference between the flushing flow and the boundary value of the expected range of the flushing flow, and determine the level parameter value of the area size level parameter item based on the calculated flow difference.

[0071] The range determination submodule 405 is used to determine the pressure adjustment amplitude range corresponding to the level parameter value.

[0072] One implementation method of determining the pressure adjustment amplitude range is to determine the pressure adjustment amplitude range corresponding to the level parameter value according to the corresponding relationship between the preset level value and the pressure adjustment range.

[0073] The amplitude determination submodule 406 is used to determine a target amplitude within the pressure adjustment amplitude range as the pressure adjustment amplitude of the flushing pressure threshold based on the flow difference between the flushing flow and the boundary value of the expected flushing flow range.

[0074] One implementation method of determining the target amplitude is: according to the correspondence between the preset flow difference and the amplitude deviation, determine the amplitude deviation corresponding to the flow difference; based on the size relationship between the flushing flow rate and the flushing flow rate range, determine the target amplitude. Specifically: When the flushing flow rate is greater than the maximum boundary value of the expected flushing flow rate range, the maximum value of the pressure adjustment amplitude range is taken as the first starting point, and the pressure adjustment amplitude value within the target pressure adjustment amplitude range and the amplitude deviation from the first starting point is calculated as the target amplitude; When the flushing flow rate is less than or greater than the maximum boundary value of the expected flushing flow rate range, the minimum value of the pressure adjustment amplitude range is taken as the second starting point, and the pressure adjustment amplitude value within the target pressure adjustment amplitude range and the amplitude deviation from the second starting point is calculated as the target amplitude; When the flushing flow rate is within the expected flushing flow rate range, the average value of the pressure adjustment amplitude range is taken as the third starting point, and the pressure adjustment amplitude value within the target pressure adjustment amplitude range and the amplitude deviation from the third starting point is calculated as the target amplitude.

[0075] It can be seen that in this embodiment, within the pressure adjustment amplitude range corresponding to the level parameter value, the target amplitude is determined according to the flow deviation, so that the determined pressure adjustment amplitude matches the deviation flow of the flushing flow and is within the pressure adjustment amplitude range corresponding to the level parameter value, thereby improving the accuracy of determining the pressure adjustment amplitude.

[0076] The flushing control module 407 is used to update the flushing pressure threshold based on the pressure adjustment amplitude, and control the flushing device according to the adjusted flushing pressure threshold.

[0077] Corresponding to the above-mentioned flushing system based on the ventricular catheter pump, the embodiment of the present application also provides a flushing pressure control method.

[0078] See also Figure 5 , Figure 5A flow chart of a flushing pressure control method provided in an embodiment of the present application is applied to a flushing control device in a flushing system, wherein the flushing system further comprises a flushing device, the flushing control device is connected to the flushing device, the flushing device is connected to a ventricular catheter pump, and the flushing device is used to inject flushing liquid into the ventricular catheter pump through a preset gap area of ​​the ventricular catheter pump; the method comprises: Step S501: obtaining the flushing pressure and flushing flow rate of the flushing fluid injected by the flushing device into the ventricular catheter pump; Step S502: determining a grade parameter value of a region size grade parameter item based on the flushing pressure and the flushing flow rate, wherein the region size grade parameter item represents the region size degree of the preset gap region; Step S503: determining a pressure adjustment amplitude of a flushing pressure threshold based on the level parameter value; Step S504: Based on the pressure adjustment amplitude, the flushing pressure threshold is updated, and the flushing device is controlled according to the adjusted flushing pressure threshold.

[0079] In one embodiment of the present application, the level parameter value of the area size level parameter item is determined based on the flushing pressure and flushing flow rate, including: Determine an expected range of flushing flow rate that matches the flushing pressure, and judge whether the flushing flow rate is within the expected range of flushing flow rate; If not, the flow difference between the flushing flow rate and the boundary value of the expected range of the flushing flow rate is calculated, and the level parameter value of the area size level parameter item is determined based on the calculated flow difference.

[0080] In one embodiment of the present application, if the flushing flow rate is within the expected flushing flow rate range, the method further includes: determining a preset standard parameter value as the grade parameter value of the area size grade parameter item.

[0081] In one embodiment of the present application, the pressure adjustment amplitude of the flushing pressure threshold is determined based on the level parameter value, including: Determine the pressure adjustment amplitude range corresponding to the level parameter value; Based on the flow difference between the flushing flow rate and the boundary value of the flushing flow rate range, a target amplitude within the pressure adjustment amplitude range is determined as the pressure adjustment amplitude of the flushing pressure threshold.

[0082] In one embodiment of the present application, the flushing pressure represents the flushing pressure fluctuation information of the flushing liquid injected by the flushing device, and the flushing flow represents the flushing flow fluctuation information of the flushing liquid injected by the flushing device; the level parameter value of the area size level parameter item is determined based on the flushing pressure and the flushing flow, including: Calculate the pressure change rate of the flushing pressure and calculate the flow change rate of the flushing flow; The correlation between the pressure change rate and the flow change rate is calculated, and the level parameter value of the area size level parameter item corresponding to the correlation is determined.

[0083] As can be seen from the above, the flushing system provided in this embodiment is used to determine the level parameter value of the preset gap area through the flushing pressure and the flushing flow, and then update the flushing pressure threshold based on the level parameter value of the preset gap area, and then control the flushing device based on the updated flushing pressure threshold; it can be seen that this embodiment takes into account the specific characteristics of the ventricular catheter pump, that is, the area size of the preset gap area through which the flushing liquid passes, so that the control of the flushing device is adaptive to the characteristics of the ventricular catheter pump to achieve adaptive control of the flushing device.

[0084] Furthermore, the level parameter value of the preset gap area size is determined based on the flushing pressure and flushing flow of the flushing liquid. The flushing pressure and flow can reflect the characteristics of the flushing liquid being affected by the preset gap area. Therefore, through the flushing pressure and flow, the parameter value of the preset gap area size can be accurately determined, thereby achieving more precise adaptive control of the flushing equipment.

[0085] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website site, a computer, a server or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or a data center that includes one or more available media integrated. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state drive Solid State Disk (SSD)), etc.

[0086] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0087] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the method embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0088] The above description is only a preferred embodiment of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. A flushing system based on a ventricular catheter pump, characterized in that: The flushing system comprises a flushing control device and a flushing device, wherein the flushing control device is connected to the flushing device, and the flushing device is connected to a ventricular catheter pump, wherein: The flushing device is used to inject flushing fluid into the ventricular catheter pump through a preset gap area of ​​the ventricular catheter pump; The flushing control device comprises: A data acquisition module, used for obtaining the flushing pressure and flushing flow rate of the flushing fluid injected by the flushing device into the ventricular catheter pump; A parameter determination module, used to determine a grade parameter value of an area size grade parameter item based on the flushing pressure and the flushing flow rate, wherein the area size grade parameter item represents the area size degree of the preset gap area; an amplitude determination module, for determining a pressure adjustment amplitude of a flushing pressure threshold based on the level parameter value; The flushing control module is used to update the flushing pressure threshold based on the pressure adjustment amplitude, and control the flushing device according to the adjusted flushing pressure threshold.

2. The system according to claim 1, characterized in that The parameter determination module comprises: A flow determination submodule, used to determine an expected range of flushing flow that matches the flushing pressure, and to determine whether the flushing flow is within the expected range of flushing flow. If not, a first parameter determination submodule is triggered; The first parameter determination submodule is used to calculate the flow difference between the flushing flow and the boundary value of the expected range of the flushing flow, and determine the level parameter value of the area size level parameter item based on the calculated flow difference.

3. The system according to claim 2, characterized in that The parameter determination module further includes a second parameter determination submodule, wherein: The flow rate determination submodule is specifically configured to trigger the second parameter determination submodule when determining that the flushing flow rate is within the expected flushing flow rate range; The second parameter determination submodule is used to determine a preset standard parameter value as a level parameter value of the region size level parameter item.

4. The system according to any one of claims 2 or 3, characterized in that The amplitude determination module comprises: A range determination submodule, used to determine the pressure adjustment amplitude range corresponding to the level parameter value; The amplitude determination submodule is used to determine a target amplitude within the pressure adjustment amplitude range as the pressure adjustment amplitude of the flushing pressure threshold based on the flow difference between the flushing flow and the boundary value of the flushing flow range.

5. The system according to claim 1, characterized in that The flushing pressure represents the flushing pressure fluctuation information of the flushing liquid injected by the flushing device, and the flushing flow represents the flushing flow fluctuation information of the flushing liquid injected by the flushing device; the parameter determination module is specifically used to calculate the pressure change rate of the flushing pressure and the flow change rate of the flushing flow; calculate the correlation between the pressure change rate and the flow change rate, and determine the level parameter value of the area size level parameter item corresponding to the correlation.

6. A flushing pressure control method, characterized in that: A flushing control device used in a flushing system, the flushing system also includes a flushing device, the flushing control device is connected to the flushing device, the flushing device is connected to a ventricular catheter pump, and the flushing device is used to inject flushing liquid into the ventricular catheter pump through a preset gap area of ​​the ventricular catheter pump; the method includes: Obtaining the flushing pressure and flushing flow rate of the flushing fluid injected by the flushing device into the ventricular catheter pump; Based on the flushing pressure and flushing flow rate, determining a grade parameter value of an area size grade parameter item, wherein the area size grade parameter item represents the area size degree of the preset gap area; determining a pressure adjustment amplitude of a flushing pressure threshold based on the level parameter value; Based on the pressure adjustment amplitude, the flushing pressure threshold is updated, and the flushing device is controlled according to the adjusted flushing pressure threshold.

7. The method according to claim 6, characterized in that The step of determining the level parameter value of the area size level parameter item based on the flushing pressure and the flushing flow rate includes: Determine an expected range of flushing flow rate that matches the flushing pressure, and judge whether the flushing flow rate is within the expected range of flushing flow rate; If not, the flow difference between the flushing flow rate and the boundary value of the expected range of the flushing flow rate is calculated, and the level parameter value of the area size level parameter item is determined based on the calculated flow difference.

8. The method according to claim 7, characterized in that If the flushing flow rate is within the expected flushing flow rate range, the method further includes: determining a preset standard parameter value as a grade parameter value of the area size grade parameter item.

9. The method according to any one of claims 7 or 8, characterized in that The step of determining the pressure adjustment amplitude of the flushing pressure threshold based on the level parameter value includes: Determine the pressure adjustment amplitude range corresponding to the level parameter value; Based on the flow difference between the flushing flow rate and the boundary value of the flushing flow rate range, a target amplitude within the pressure adjustment amplitude range is determined as the pressure adjustment amplitude of the flushing pressure threshold.

10. The method according to claim 6, characterized in that The flushing pressure represents the flushing pressure fluctuation information of the flushing liquid injected by the flushing device, and the flushing flow rate represents the flushing flow rate fluctuation information of the flushing liquid injected by the flushing device; The step of determining the level parameter value of the area size level parameter item based on the flushing pressure and the flushing flow rate includes: Calculate the pressure change rate of the flushing pressure and calculate the flow change rate of the flushing flow; The correlation between the pressure change rate and the flow change rate is calculated, and the level parameter value of the area size level parameter item corresponding to the correlation is determined.

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