A flushing system based on a ventricular catheter pump and a flushing pressure control method

Abstract

An embodiment of the present application provides a flushing system based on a ventricular catheter pump and a flushing pressure control method, which relates to the technical field of medical devices. The flushing control device includes: a data acquisition module for acquiring 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 for determining the level parameter value of the regional dimension level parameter item based on the flushing pressure and flushing flow rate, where the regional dimension level parameter item characterizes the regional dimension degree of a preset gap region; an amplitude determination module for determining the pressure adjustment amplitude of the flushing pressure threshold based on the level parameter value; and a flushing control module for updating the flushing pressure threshold based on the pressure adjustment amplitude and controlling the flushing device according to the adjusted flushing pressure threshold. Applying the solution provided by the embodiment of the present application can achieve intelligent adaptive control of the flushing pressure.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and particularly 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 auxiliary functions for patients suffering from heart-related diseases, such as heart failure patients, and is used to assist the heart in pumping blood to other parts of the body.

[0003] The ventricular catheter pump is also connected to a flushing system. The flushing system is used to inject a flushing fluid into the environmental area where the driving component in the ventricular catheter pump is located. By using the scouring pressure of the flushing fluid to counteract the blood pressure entering the driving component, a series of medical accidents such as subsequent blood clots and pump failures caused by blood entering the driving component can be avoided. Currently, how to achieve adaptive control of the flushing pressure has become an urgent problem to be solved. Summary of the Invention

[0004] The purpose of the embodiments 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 the flushing pressure. The specific technical solutions are as follows:

[0005] In a first aspect, the embodiments of the present application provide a flushing system based on a ventricular catheter pump. The flushing system includes 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, where:

[0006] The flushing device is used to inject a flushing fluid into the ventricular catheter pump through a preset gap area of the ventricular catheter pump;

[0007] The flushing control device includes:

[0008] A data acquisition module, configured to acquire the flushing pressure and flushing flow rate of the flushing fluid injected by the flushing device into the ventricular catheter pump;

[0009] A parameter determination module, configured to determine a grade parameter value of a regional dimension grade parameter item based on the flushing pressure and flushing flow rate, where the regional dimension grade parameter item characterizes the regional dimension degree of the preset gap area;

[0010] An amplitude determination module, configured to determine a pressure adjustment amplitude of a flushing pressure threshold based on the grade parameter value;

[0011] A flushing control module, configured to update the flushing pressure threshold based on the pressure adjustment amplitude and control the flushing device according to the adjusted flushing pressure threshold.

[0012] In one embodiment of the present application, the above-mentioned parameter determination module includes:

[0013] A flow rate judgment sub-module, configured to determine an expected range of flushing flow rate that matches the flushing pressure, judge whether the flushing flow rate is within the expected range of the flushing flow rate, and if not, trigger the first parameter determination sub-module;

[0014] The first parameter determination sub-module is configured to calculate the flow rate difference between the flushing flow rate and the boundary value of the expected range of the flushing flow rate, and determine the level parameter value of the regional dimension level parameter item based on the calculated flow rate difference.

[0015] In one embodiment of the present application, the above-mentioned parameter determination module further includes a second parameter determination sub-module, wherein:

[0016] The flow rate judgment sub-module is specifically configured to trigger the second parameter determination sub-module when it judges that the flushing flow rate is within the expected range of the flushing flow rate;

[0017] The second parameter determination sub-module is configured to determine the preset standard parameter value as the level parameter value of the regional dimension level parameter item.

[0018] In one embodiment of the present application, the above-mentioned amplitude determination module includes:

[0019] A range determination sub-module, configured to determine the pressure adjustment amplitude range corresponding to the level parameter value;

[0020] The amplitude determination sub-module is configured to determine the target amplitude within the pressure adjustment amplitude range based on the flow rate difference between the flushing flow rate and the boundary value of the flushing flow rate range, and use it as the pressure adjustment amplitude of the flushing pressure threshold.

[0021] In one embodiment of the present application, the above-mentioned flushing pressure represents the flushing pressure fluctuation information of the flushing fluid injected by the flushing device, and the flushing flow rate represents the flushing flow rate fluctuation information of the flushing fluid injected by the flushing device; the parameter determination module is specifically configured to calculate the pressure change rate of the flushing pressure and calculate the flow rate change rate of the flushing flow rate; calculate the correlation between the pressure change rate and the flow rate change rate, and determine the level parameter value of the regional dimension level parameter item corresponding to the correlation.

[0022] 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. The flushing system further includes a flushing device. The flushing control device is connected to the flushing device, and the flushing device is connected to a ventricular catheter pump. The flushing device is configured to inject flushing fluid into the ventricular catheter pump through a preset gap area of the ventricular catheter pump; the method includes:

[0023] Obtain the flushing pressure and flushing flow rate of the flushing fluid injected by the flushing device into the ventricular catheter pump;

[0024] Based on the flushing pressure and flushing flow rate, determine the grade parameter value of the regional dimension grade parameter item, where the regional dimension grade parameter item characterizes the regional dimension degree of the preset gap area;

[0025] Based on the grade parameter value, determine the pressure adjustment range of the flushing pressure threshold;

[0026] Based on the pressure adjustment range, update the flushing pressure threshold, and control the flushing device according to the adjusted flushing pressure threshold.

[0027] In an embodiment of the present application, the above-mentioned determining the grade parameter value of the regional dimension grade parameter item based on the flushing pressure and flushing flow rate includes:

[0028] Determine the expected range of the flushing flow rate matching the flushing pressure, and determine whether the flushing flow rate is within the expected range of the flushing flow rate;

[0029] If not, calculate the flow rate difference between the flushing flow rate and the boundary value of the expected range of the flushing flow rate, and determine the grade parameter value of the regional dimension grade parameter item based on the calculated flow rate difference.

[0030] In an embodiment of the present application, if the flushing flow rate is within the expected range of the flushing flow rate, the method further includes: determining the preset standard parameter value as the grade parameter value of the regional dimension grade parameter item.

[0031] In an embodiment of the present application, the above-mentioned determining the pressure adjustment range of the flushing pressure threshold based on the grade parameter value includes:

[0032] Determine the range of the pressure adjustment range corresponding to the grade parameter value;

[0033] Based on the flow rate difference between the flushing flow rate and the boundary value of the flushing flow rate range, determine the target range within the pressure adjustment range as the pressure adjustment range of the flushing pressure threshold.

[0034] In an embodiment of the present application, the above-mentioned flushing pressure characterizes the flushing pressure fluctuation information of the flushing fluid injected by the flushing device, and the flushing flow rate characterizes the flushing flow rate fluctuation information of the flushing fluid injected by the flushing device; the above-mentioned determining the grade parameter value of the regional dimension grade parameter item based on the flushing pressure and flushing flow rate includes:

[0035] Calculate the pressure change rate of the flushing pressure and calculate the flow rate change rate of the flushing flow rate;

[0036] Calculate the correlation between the rate of change of the pressure and the rate of change of the flow rate, and determine the grade parameter value of the grade parameter item corresponding to the region size of the preset gap region.

[0037] As can be seen from the above, by applying the flushing system provided by the embodiments of the present application, the grade parameter value of the preset gap region is determined through the flushing pressure and the flushing flow rate, and then the flushing pressure threshold is updated based on the grade parameter value of the preset gap region, and then the flushing device is controlled by using 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 region size of the preset gap region through which the flushing fluid passes, so that the control of the flushing device adapts to the characteristics of the ventricular catheter pump to achieve the adaptive control of the flushing device.

[0038] Furthermore, based on the flushing pressure and the flushing flow rate of the flushing fluid, the grade parameter value of the size of the preset gap region is determined. The flushing pressure and the flow rate can reflect the characteristics of the flushing fluid affected by the preset gap region. Therefore, through the flushing pressure and the flow rate, the parameter value of the size of the preset gap region can be accurately determined, and then the more precise adaptive control of the flushing device can be achieved.

[0039] Of course, it is not necessary for any product or method implementing the present application to achieve all the above advantages simultaneously. Description of the Drawings

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other embodiments can also be obtained based on these drawings.

[0041] Figure 1 It is a schematic diagram of the application scenario of the embodiments of the present application;

[0042] Figure 2 It is a schematic structural diagram of the first flushing system based on a ventricular catheter pump provided by the embodiments of the present application;

[0043] Figure 3 It is a schematic structural diagram of the second flushing system based on a ventricular catheter pump provided by the embodiments of the present application;

[0044] Figure 4 It is a schematic structural diagram of the third flushing system based on a ventricular catheter pump provided by the embodiments of the present application;

[0045] Figure 5 It is a schematic flowchart of a flushing pressure control method provided by the embodiments of the present application. Detailed Embodiments

[0046] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art based on the present application belong to the scope of protection of the present application.

[0047] Before introducing the embodiments of the present application, the application scenario of the present application will be described in conjunction with Figure 1 to illustrate the application scenario of the present application.

[0048] Figure 1 It includes a ventricular catheter pump 101 and a flushing system 102. Among them, the flushing system 102 includes a flushing control device 1021 and a flushing device 1022. The flushing control device 1021 is connected to the flushing device 1022, and the flushing device 1022 is connected to the ventricular catheter pump 101 through a flushing pipeline.

[0049] The ventricular catheter pump 101 is a device for assisting the patient's heart to pump 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.

[0050] When the ventricular catheter pump 101 operates in the patient's body, blood may enter the drive assembly of the ventricular catheter pump 101, such as into the motor, resulting in a series of medical safety accidents such as subsequent thrombus and pump failure. To avoid such accidents, a common measure is to generate a flushing fluid with a direction opposite to the blood flow outside the drive assembly through the flushing system 102, and the flushing pressure of the flushing fluid is greater than the blood pressure, so as to prevent blood from flowing into the drive assembly.

[0051] 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, flushing flow rate, etc. of the flushing device 1022.

[0052] The flushing device 1022 can inject flushing fluid into the ventricular catheter pump 101 through a preset gap area of the ventricular catheter pump 101. The above preset gap area can be the gap area between the drive assembly of the ventricular catheter pump 101 and the drive shaft. The drive shaft is the shaft connecting the drive assembly and the pumping assembly of the ventricular catheter pump. The flushing device injects flushing fluid outside the drive assembly through the above gap area to form a pressure barrier to oppose the blood and prevent blood from entering the drive assembly.

[0053] 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 control method of the flushing device with a fixed flushing pressure cannot adapt to different ventricular catheter pumps.

[0054] See Figure 2 , Figure 2 which is a schematic structural diagram of a first flushing system provided by an embodiment of the present application based on a ventricular catheter pump. The flushing system includes a flushing device and a flushing control device.

[0055] The flushing device 201 is used to inject a flushing liquid into the ventricular catheter pump through a preset gap area of the ventricular catheter pump.

[0056] The flushing control device includes:

[0057] The data acquisition module 202 is used to acquire the flushing pressure and flushing flow rate of the flushing liquid injected by the flushing device into the ventricular catheter pump.

[0058] After the flushing device starts to operate, it can collect the flushing pressure and flushing flow rate at intervals, store the collected data in the memory. Based on this, the data acquisition module can read the above flushing pressure and flushing flow rate from the memory.

[0059] The above flushing pressure can be collected by a pressure sensor, and the pressure sensor can be integrated in the pipeline between the flushing device and the ventricular catheter pump.

[0060] The above flushing flow rate can be collected by a flow meter. When the driving component of the flushing device is a stepping motor, the corresponding relationship between the forward distance of the stepping motor and the flushing flow rate can be used to calculate the flushing flow rate of the flushing liquid in real time.

[0061] The parameter determination module 203 is used to determine the level parameter value of the area size level parameter item based on the flushing pressure and flushing flow rate.

[0062] Among them, the area size level parameter item characterizes the area size degree of the preset gap area. The level parameter value is the specific data of the area size degree of the preset gap area, and is represented in a level form. When the level parameter value is higher, it can indicate that the area size degree is larger or smaller.

[0063] The first implementation manner of determining the level parameter value is: inputting the flushing pressure and flushing flow rate into a preset level prediction model to obtain the level parameter value output by the level prediction model.

[0064] The above level prediction model is obtained by training an initial neural network model with the flushing pressure and flushing flow rate of a sample flushing system as training samples and the actual level parameter of the sample gap area size as the training benchmark, and is used to predict the parameter value of the area size degree of the gap area. The above sample gap area is the area where the sample flushing system injects the flushing liquid into the sample ventricular catheter pump.

[0065] The second implementation manner for determining the level parameter value is as follows: when the flushing pressure represents the flushing pressure fluctuation information of the flushing fluid injected by the flushing device, and the flushing flow rate represents the flushing flow rate fluctuation information of the flushing fluid injected by the flushing device, the pressure change rate of the flushing pressure can be calculated, and the flow rate change rate of the flushing flow rate can be calculated; calculate the correlation between the pressure change rate and the flow rate change rate, and determine the level parameter value of the area size level parameter item corresponding to the correlation.

[0066] 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 rate change rate of the flushing flow rate can be calculated. Specifically, the pressure change rate of the flushing pressure and the flow rate change rate of the flushing flow rate within a preset time period can be calculated.

[0067] The correlation represents the correlation between the pressure change rate and the flow rate change rate. When the correlation is larger, it indicates that the correlation between the pressure change rate and the flow rate change rate is higher; when the correlation is smaller, it indicates that the correlation between the pressure change rate and the flow rate change rate is lower. Any method in the prior art can be used to calculate the correlation.

[0068] After calculating the correlation, the level value corresponding to the current correlation can be determined according to the corresponding relationship between the preset correlation and the level value, and used as the level parameter value.

[0069] 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 the flushing pressure and the flushing flow rate. Also, since the change characteristics of the flushing pressure and the change characteristics of the flushing flow rate 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.

[0070] The amplitude determination module 204 is configured to determine the pressure adjustment amplitude of the flushing pressure threshold based on the level parameter value.

[0071] 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 then the operation of the flushing device is started. It can be seen that the flushing pressure threshold is also used as the judgment basis for whether the flushing device stops running.

[0072] One implementation manner for determining the pressure adjustment amplitude is: determine the difference value between the level parameter value and the standard level parameter value, and determine the pressure adjustment amplitude corresponding to the level parameter value based on the corresponding relationship between the difference value and the pressure change value.

[0073] The above standard level parameter value is the level parameter value corresponding to the flushing pressure threshold. When the flushing pressure threshold is preset, the standard level parameter value is preset; when the flushing pressure threshold is updated according to each of the above 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.

[0074] Determine the pressure adjustment range corresponding to the level parameter value according to the corresponding relationship between the preset level value and the pressure change value.

[0075] For other implementation manners of determining the pressure adjustment range, reference can be made to the subsequent embodiments, which will not be elaborated here.

[0076] The flushing control module 205 is configured to update the flushing pressure threshold based on the pressure adjustment range and control the flushing device according to the adjusted flushing pressure threshold.

[0077] One implementation manner of updating the flushing pressure threshold is: calculate the sum value between the flushing pressure threshold and the pressure adjustment range as the adjusted flushing pressure.

[0078] 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 shaft 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 pressure of the flushing liquid increases, and the flushing liquid is injected into the ventricular catheter pump through a preset gap area; when the squeezing reaches a certain degree, 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 still injects into the ventricular catheter pump from the preset gap, the flushing volume decreases, and the flushing pressure also decreases accordingly. 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 so on in a cycle. It can be seen that as the flushing pressure threshold is adjusted, the flushing pressure is also adjusted accordingly.

[0079] As can be seen from the above, by applying the flushing system provided in this embodiment, the level parameter value of the preset gap area is determined through the flushing pressure and the flushing flow rate, 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 by using 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 adapts to the characteristics of the ventricular catheter pump to achieve the adaptive control of the flushing device.

[0080] Further, based on the flushing pressure and flushing flow rate of the flushing liquid, the hierarchical parameter value of the preset gap area size is determined. The flushing pressure and flow rate can reflect the characteristics of the flushing liquid affected by the preset gap area. Therefore, through the flushing pressure and flow rate, the parameter value of the preset gap area size can be accurately determined, and then more precise adaptive control of the flushing device can be achieved.

[0081] In the foregoing Figure 2 corresponding embodiment, the parameter determination module 203 may include the following 303-304. Based on this, see Figure 3 , Figure 3 FIG. is a schematic structural diagram of a second flushing system based on a ventricular catheter pump provided in an embodiment of the present application. The above system includes the following 301-306.

[0082] A flushing device 301 for injecting a flushing liquid into the ventricular catheter pump through a preset gap area of the ventricular catheter pump.

[0083] The flushing control device includes:

[0084] A data acquisition module 302 for acquiring the flushing pressure and flushing flow rate of the flushing liquid injected by the flushing device into the ventricular catheter pump.

[0085] A flow rate judgment sub-module 303 for determining the expected range of the flushing flow rate matching the flushing pressure, judging whether the flushing flow rate is within the expected range of the flushing flow rate, and if not, triggering a first parameter determination sub-module 304.

[0086] Determining the expected range of the flushing flow rate can be understood as: the range that the flushing flow rate is expected to reach under the above flushing pressure. One implementation manner of determining the expected range of the flushing flow rate is: according to the corresponding relationship between the preset flushing pressure and the flushing flow rate range set in advance, determining the flushing flow rate range corresponding to the flushing pressure as the expected range of the flushing flow rate.

[0087] When the flushing flow rate is not within the expected range of the flushing flow rate, the first parameter determination sub-module 304 is triggered.

[0088] The first parameter determination sub-module 304 is used to calculate the flow rate difference between the flushing flow rate and the boundary value of the expected range of the flushing flow rate, and determine the hierarchical parameter value of the area size hierarchical parameter item based on the calculated flow rate difference.

[0089] The flow rate difference characterizes the gap between the flushing flow rate and the expected range of the flushing flow rate. The boundary values of the above expected range of the flushing flow rate are the maximum value and the minimum value of the expected range of the flushing flow rate. One implementation manner of calculating the flow rate difference is: if the flushing flow rate is greater than the maximum value of the expected range of the flushing flow rate, calculate the flow rate difference between the flushing flow rate and the maximum value; if the flushing flow rate is less than the minimum value of the expected range of the flushing flow rate, calculate the flow rate difference between the flushing flow rate and the minimum value.

[0090] The above flow difference reflects the gap between the flushing flow rate and the expected range of the flushing flow rate. When the flow difference is larger, it means that the current flushing flow rate deviates further from the expected range of the flushing flow rate. When the flow difference is smaller, it means that the current flushing flow rate deviates closer to the expected range of the flushing flow rate.

[0091] One implementation of determining the grade parameter value based on the flow difference is: calculating the ratio between the flow difference and a preset standard unit, and converting the calculated ratio into a grade parameter value. For example: calculating the flow difference as 10, the preset standard unit as 2, the ratio as 5, and according to the corresponding relationship between the preset ratio and the grade value, converting 5 into the corresponding grade parameter value.

[0092] It can be seen that in this embodiment, by using the magnitude relationship and the gap between the flushing flow rate and the expected range of the flushing flow rate that matches the flushing pressure, the deviation relationship between the flushing flow rate and the current flushing pressure can be accurately reflected. The above deviation relationship can accurately reflect the regional size of the preset gap area, thereby improving the accuracy of determining the grade parameter value.

[0093] When the flushing flow rate is within the expected range of the flushing flow rate, in one embodiment of the present application, the second parameter determination sub-module is triggered.

[0094] The second parameter determination sub-module 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 range of the flushing flow rate, it can indicate that the deviation between the flushing flow rate and the flushing pressure is within the allowable deviation range. In this case, directly determining the preset standard parameter value as the grade parameter value improves the efficiency of data determination.

[0095] The amplitude determination module 305 is used to determine the pressure adjustment amplitude of the flushing pressure threshold based on the grade parameter value.

[0096] 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.

[0097] In the foregoing Figure 3 corresponding embodiment, the amplitude determination module may include the following 405 - 406. Based on this, see Figure 4 , Figure 4 FIG. 29 is a schematic structural diagram of a third flushing system based on a ventricular catheter pump provided by an embodiment of the present application. The above system includes the following 401 - 407.

[0098] The flushing device 401 is used to inject flushing liquid into the ventricular catheter pump through a preset gap area of the ventricular catheter pump.

[0099] The flushing control device includes:

[0100] A data acquisition module 402, configured to acquire the flushing pressure and flushing flow rate of the flushing fluid injected by the flushing device into the ventricular catheter pump;

[0101] A flow rate judgment sub-module 403, configured to determine an expected range of flushing flow rates matching the flushing pressure, judge whether the flushing flow rate is within the expected range of the flushing flow rate, and if not, trigger a first parameter determination sub-module;

[0102] A first parameter determination sub-module 404, configured to calculate the flow rate difference between the flushing flow rate and the boundary value of the expected range of the flushing flow rate, and determine the grade parameter value of the regional dimension grade parameter item based on the calculated flow rate difference.

[0103] A range determination sub-module 405, configured to determine the range of pressure adjustment amplitudes corresponding to the grade parameter value.

[0104] One implementation manner of determining the range of pressure adjustment amplitudes is: according to the corresponding relationship between the preset grade value and the pressure adjustment range, determine the range of pressure adjustment amplitudes corresponding to the grade parameter value.

[0105] An amplitude determination sub-module 406, configured to determine the target amplitude within the range of pressure adjustment amplitudes based on the flow rate difference between the flushing flow rate and the boundary value of the expected range of the flushing flow rate, and use it as the pressure adjustment amplitude of the flushing pressure threshold.

[0106] One implementation manner of determining the target amplitude is: according to the corresponding relationship between the preset flow rate difference and the amplitude deviation, determine the amplitude deviation corresponding to the above flow rate difference; based on the magnitude relationship between the flushing flow rate and the flushing flow rate range, determine the target amplitude. Specifically:

[0107] When the flushing flow rate is greater than the maximum boundary value of the expected range of the flushing flow rate, using the maximum value of the range of pressure adjustment amplitudes as the first starting point, calculate the pressure adjustment amplitude value within the target range of pressure adjustment amplitudes that is at a distance of the above amplitude deviation from the first starting point, and use it as the target amplitude;

[0108] When the flushing flow rate is less than when the flushing flow rate is greater than the maximum boundary value of the expected range of the flushing flow rate, using the minimum value of the range of pressure adjustment amplitudes as the second starting point, calculate the pressure adjustment amplitude value within the target range of pressure adjustment amplitudes that is at a distance of the above amplitude deviation from the second starting point, and use it as the target amplitude;

[0109] When the flushing flow rate is within the expected range of the flushing flow rate, using the average value of the range of pressure adjustment amplitudes as the third starting point, calculate the pressure adjustment amplitude value within the target range of pressure adjustment amplitudes that is at a distance of the above amplitude deviation from the third starting point, and use it as the target amplitude.

[0110] It can be seen that in this embodiment, within the pressure adjustment range corresponding to the level parameter value, the target range is determined based on the flow deviation, such that the determined pressure adjustment range matches the deviation flow of the flushing flow rate and is within the pressure adjustment range corresponding to the level parameter value, thereby improving the accuracy of determining the pressure adjustment range.

[0111] The flushing control module 407 is configured to update the flushing pressure threshold based on the pressure adjustment range and control the flushing device according to the adjusted flushing pressure threshold.

[0112] Corresponding to the above flushing system based on the ventricular catheter pump, an embodiment of the present application further provides a flushing pressure control method.

[0113] See Figure 5 , Figure 5 which is a schematic flowchart of a flushing pressure control method provided by an embodiment of the present application, applied to a flushing control device in a flushing system. The flushing system further includes a flushing device, the flushing control device is connected to the flushing device, and the flushing device is connected to the ventricular catheter pump. The flushing device is configured to inject a flushing solution into the ventricular catheter pump through a preset gap area of the ventricular catheter pump. The method includes:

[0114] Step S501: Obtain the flushing pressure and flushing flow rate of the flushing solution injected by the flushing device into the ventricular catheter pump;

[0115] Step S502: Determine the level parameter value of the area size level parameter item based on the flushing pressure and flushing flow rate, where the area size level parameter item characterizes the area size degree of the preset gap area;

[0116] Step S503: Determine the pressure adjustment range of the flushing pressure threshold based on the level parameter value;

[0117] Step S504: Update the flushing pressure threshold based on the pressure adjustment range and control the flushing device according to the adjusted flushing pressure threshold.

[0118] In an embodiment of the present application, the determining the level parameter value of the area size level parameter item based on the flushing pressure and flushing flow rate includes:

[0119] Determine the expected range of the flushing flow rate matching the flushing pressure, and determine whether the flushing flow rate is within the expected range of the flushing flow rate;

[0120] If not, calculate the flow difference between the flushing flow rate and the boundary value of the expected range of the flushing flow rate, and determine the level parameter value of the area size level parameter item based on the calculated flow difference.

[0121] In one embodiment of the present application, if the flushing flow rate is within the desired range of the flushing flow rate, the method further includes: determining the preset standard parameter value as the grading parameter value of the regional dimension grading parameter item.

[0122] In one embodiment of the present application, the above-mentioned determining the pressure adjustment amplitude of the flushing pressure threshold based on the grading parameter value includes:

[0123] Determining the range of the pressure adjustment amplitude corresponding to the grading parameter value;

[0124] Based on the flow rate difference between the flushing flow rate and the boundary value of the flushing flow rate range, determining the target amplitude within the pressure adjustment amplitude range as the pressure adjustment amplitude of the flushing pressure threshold.

[0125] In one embodiment of the present application, the above-mentioned flushing pressure characterizes the flushing pressure fluctuation information of the flushing fluid injected by the flushing device, and the flushing flow rate characterizes the flushing flow rate fluctuation information of the flushing fluid injected by the flushing device; the determining the grading parameter value of the regional dimension grading parameter item based on the flushing pressure and the flushing flow rate includes:

[0126] Calculating the pressure change rate of the flushing pressure and calculating the flow rate change rate of the flushing flow rate;

[0127] Calculating the correlation degree between the pressure change rate and the flow rate change rate, and determining the grading parameter value of the regional dimension grading parameter item corresponding to the correlation degree.

[0128] As can be seen from the above, by applying the flushing system provided in this embodiment, the grading parameter value of the preset gap area is determined through the flushing pressure and the flushing flow rate, and then the flushing pressure threshold is updated based on the grading 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 regional dimension of the preset gap area through which the flushing fluid passes, so that the control of the flushing device adapts to the characteristics of the ventricular catheter pump to achieve the adaptive control of the flushing device.

[0129] Furthermore, based on the flushing pressure and the flushing flow rate of the flushing fluid, the grading parameter value of the preset gap area size is determined. The flushing pressure and the flow rate can reflect the characteristics of the flushing fluid affected by the preset gap area. Therefore, through the flushing pressure and the flow rate, the parameter value of the preset gap area size can be accurately determined, and further, more accurate adaptive control of the flushing device can be achieved.

[0130] 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 processes or functions described in the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more integrated available media. The available medium can be a magnetic medium (such as a floppy disk, a hard disk, a magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state disk (SSD)).

[0131] It should be noted that in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including", or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements but also other elements that are not explicitly listed, or also includes elements that are inherent to such process, method, article, or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article, or device that includes the element.

[0132] Each embodiment in this specification is described in a related manner. The same or similar parts between the embodiments can be referred to each other, and the differences between each embodiment and other embodiments are emphasized. In particular, for method embodiments, since they are basically similar to method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiments.

[0133] The above are only the preferred embodiments of the present application and are not intended to limit the protection scope of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application are all 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; A flushing control module, configured to update the flushing pressure threshold based on the pressure adjustment amplitude, and control the flushing device according to the adjusted flushing pressure threshold; 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.

2. The system according to claim 1, 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.

3. The system according to claim 1 or 2, 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.

4. 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.

Images