Abnormal pressure detection method and infusion pump

Abstract

The invention discloses a pressure anomaly detection method and an infusion pump. The method comprises the following steps: acquiring a pressure signal; the pressure signal is compared with a preset pressure threshold value, when it is determined that the pressure signal does not reach the preset pressure threshold value, if it is determined that pressure mutation exists in the alternating period of at least one driving pump piece according to the pressure signal, alarm prompt information representing pressure abnormity is output, the alternating period of the driving pump sheets refers to the switching period from the time when the last driving pump sheet is driven to completely extrude the infusion pipeline to the time when the first driving pump sheet is driven to completely extrude the infusion pipeline, and the first driving pump sheet and the last driving pump sheet are two of a plurality of driving pump sheets which are sequentially arranged in the infusion direction in a driving mechanism in the infusion pump. The first driving pump piece and the last driving pump piece are arranged at the most upstream position and the most downstream position of the multiple driving pump pieces in the infusion direction respectively. The phenomenon that the alarm is not triggered when blockage occurs can be reduced, and the accuracy of infusion abnormity monitoring is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical infusion, in particular to a pressure anomaly detection method and infusion pump. BACKGROUND

[0002] At present, some infusion pumps use pressure sensors to determine whether a blockage or other pressure anomaly event occurs by detecting linear expansion of an infusion pipeline. Specifically, an alarm signal is generated when the expansion pressure value reaches an alarm threshold, thereby alarming the pressure anomaly event caused by the blockage. However, if the infusion pipeline has poor elasticity or is severely aged, a blockage event may occur during the infusion process without triggering an alarm, which may cause personal harm to the infusion object. SUMMARY

[0003] Embodiments of the present application provide a pressure anomaly detection method and infusion pump to reduce the phenomenon of a blockage occurring without triggering an alarm and improve the accuracy of infusion anomaly monitoring.

[0004] In a first aspect, embodiments of the present application provide a pressure anomaly detection method applied to an infusion pump. The infusion pump is used in cooperation with an infusion pipeline. The infusion pump is used to drive fluid in the infusion pipeline to flow in the direction of an infusion object. The infusion pump includes a processor, a driving mechanism, and a pressure sensor. The driving mechanism includes a plurality of driving pump pieces arranged in sequence along the infusion direction. The driving pump pieces include a first driving pump piece and a last driving pump piece. The first driving pump piece and the last driving pump piece are respectively arranged at the most upstream position and the most downstream position of the plurality of driving pump pieces in the infusion direction. The plurality of driving pump pieces sequentially squeeze the fluid in the infusion pipeline to flow in the infusion direction under the driving of the processor. The pressure sensor is used to detect the pressure inside the infusion pipeline and generate a corresponding pressure signal. The method includes:

[0005] obtaining the pressure signal;

[0006] determining that the pressure signal does not reach a preset pressure threshold by comparing the pressure signal with the preset pressure threshold;

[0007] if it is determined according to the pressure signal that there is a pressure mutation during at least one driving pump piece alternation period when it is determined that the pressure signal does not reach the preset pressure threshold, outputting an alarm prompt information representing a pressure anomaly, wherein the driving pump piece alternation period refers to the switching period from when the last driving pump piece is driven to completely squeeze the infusion pipeline to when the first driving pump piece is driven to completely squeeze the infusion pipeline.

[0008] In combination with the first aspect, in a possible embodiment, after the pressure signal is obtained, the method further includes:

[0009] determining that the pressure signal reaches the preset pressure threshold by comparing the pressure signal with the preset pressure threshold;

[0010] outputting an alarm prompt information representing pressure abnormality when it is determined that the pressure signal reaches the preset pressure threshold.

[0011] With reference to the first aspect, in a possible implementation, the outputting the alarm prompt information representing pressure abnormality when it is determined that the pressure signal does not reach the preset pressure threshold and in the pressure fluctuation stage includes:

[0012] determining a pressure fluctuation stage according to the pressure signal;

[0013] outputting the alarm prompt information representing pressure abnormality according to the pressure signal when it is determined that the pressure signal does not reach the preset pressure threshold and in the pressure fluctuation stage, and that there is a pressure mutation during the alternation of the at least one driving pump piece.

[0014] With reference to the first aspect, in a possible implementation, the outputting the alarm prompt information representing pressure abnormality when it is determined that the pressure signal does not reach the preset pressure threshold and in the pressure fluctuation stage includes:

[0015] outputting the alarm prompt information representing pressure abnormality according to the pressure signal when it is determined that the pressure signal does not reach the preset pressure threshold and in the pressure fluctuation stage, that there is a pressure mutation during the alternation of the at least one driving pump piece, and that the pressure gradually rises during the adjacent intermediate driving pump piece movement period after the pressure mutation; wherein the intermediate driving pump piece movement period refers to the period from when the first driving pump piece is driven to completely extrude the infusion pipeline to when the last driving pump piece is driven to completely extrude the infusion pipeline.

[0016] With reference to the first aspect, in a possible implementation, the pressure mutation is a pressure drop and the drop slope is greater than or equal to 4.

[0017] With reference to the first aspect, in a possible implementation, the outputting the alarm prompt information representing pressure abnormality when it is determined that the pressure signal does not reach the preset pressure threshold and in the pressure fluctuation stage includes:

[0018] determining, according to the pressure signal, that there is a pressure mutation during the alternation of the continuous multiple driving pump blades, and that the pressure gradually rises during the movement of the adjacent intermediate driving pump blade after the pressure mutation, outputting an alarm prompt information representing pressure abnormality.

[0019] With reference to the first aspect, in a possible implementation, the determining, according to the pressure signal, that there is a pressure mutation during the alternation of at least one driving pump blade, comprises:

[0020] determining at least one feature value according to the pressure signal, the feature type corresponding to the feature value comprising at least one of the average value, the standard deviation, the extreme value difference or the slope of the pressure during the alternation of the driving pump blade;

[0021] comparing each of the feature values with the threshold range corresponding thereto to obtain a comparison result;

[0022] determining, according to the comparison result, whether there is a pressure mutation during the alternation of the driving pump blade.

[0023] With reference to the first aspect, in a possible implementation, the determining, according to the comparison result, whether there is a pressure mutation during the alternation of the driving pump blade, comprises:

[0024] if there are multiple feature types, determining that there is a pressure mutation when the feature value corresponding to each feature type is within the corresponding threshold range according to the comparison result.

[0025] With reference to the first aspect, in a possible implementation, the pressure sensor comprises an upper pressure sensor arranged in an upstream interval of the infusion pipeline relative to the driving mechanism, for detecting the upstream pressure inside the infusion pipeline and generating a corresponding upstream pressure signal; the determining, according to the pressure signal, that there is a pressure mutation during the alternation of at least one driving pump blade, and outputting an alarm prompt information representing pressure abnormality, comprises:

[0026] determining, according to the upstream pressure signal, that there is a pressure mutation during the alternation of the continuous multiple driving pump blades, and outputting an alarm prompt information representing pressure abnormality, wherein the pressure mutation comprises the case that the pressure drops and the drop slope is greater than or equal to 4, or the case that the pressure rises and the rise slope is greater than or equal to 4.

[0027] In a second aspect, the embodiments of the present application provide another pressure anomaly detection method, applied to an infusion pump, the infusion pump being configured to be used in cooperation with an infusion pipeline, the infusion pump being configured to drive fluid in the infusion pipeline to flow towards an infusion object; the infusion pump comprising a processor, a driving mechanism, and a pressure sensor, the driving mechanism comprising a plurality of driving pump pieces arranged in sequence along an infusion direction, the driving pump pieces comprising a first driving pump piece and a last driving pump piece, the first driving pump piece and the last driving pump piece being arranged at an uppermost position and a lowermost position of the plurality of driving pump pieces along the infusion direction respectively, the plurality of driving pump pieces being configured to sequentially squeeze the fluid in the infusion pipeline to flow towards the infusion direction under the driving of the processor; the pressure sensor comprising a downstream pressure sensor arranged at a downstream interval of the infusion pipeline relative to the driving mechanism, configured to detect a downstream pressure inside the infusion pipeline and generate a corresponding downstream pressure signal; the method comprising:

[0028] obtaining the downstream pressure signal;

[0029] determining, according to the downstream pressure signal, that there is a pressure mutation during the alternation of the continuous plurality of driving pump pieces, and that there is a gradually rising trend of pressure during the movement of the adjacent intermediate driving pump piece after the alternation of the driving pump piece of each pressure mutation, and outputting alarm prompt information representing downstream blockage of the infusion pipeline, wherein the alternation of the driving pump piece refers to a switching period from when the last driving pump piece is driven to completely squeeze the infusion pipeline to when the first driving pump piece is driven to completely squeeze the infusion pipeline, and the movement of the intermediate driving pump piece refers to a period from when the first driving pump piece is driven to completely squeeze the infusion pipeline to when the last driving pump piece is driven to completely squeeze the infusion pipeline.

[0030] In combination with the second aspect, in a possible embodiment, the determining, according to the downstream pressure signal, that there is a pressure mutation during the alternation of the continuous plurality of driving pump pieces, and that there is a gradually rising trend of pressure during the movement of the adjacent intermediate driving pump piece after the alternation of the driving pump piece of each pressure mutation, and outputting alarm prompt information representing downstream blockage of the infusion pipeline, comprises:

[0031] determining a pressure fluctuation stage according to the downstream pressure signal;

[0032] in the pressure fluctuation stage, determining, according to the downstream pressure signal, that there is a pressure mutation during the alternation of the continuous plurality of driving pump pieces, and that there is a gradually rising trend of pressure during the movement of the adjacent intermediate driving pump piece after the alternation of the driving pump piece of each pressure mutation, and outputting alarm prompt information representing downstream blockage of the infusion pipeline.

[0033] In a third aspect, the embodiments of the present application provide a pressure anomaly detection apparatus applied to an infusion pump, the infusion pump being configured to be used in cooperation with an infusion pipeline, the infusion pump being configured to drive fluid in the infusion pipeline to flow towards an infusion object; the infusion pump comprising a processor, a driving mechanism and a pressure sensor, the driving mechanism comprising a plurality of driving pump pieces arranged in sequence along an infusion direction, the driving pump pieces comprising a first driving pump piece and a last driving pump piece, the first driving pump piece and the last driving pump piece being respectively arranged at an uppermost position and a lowermost position of the plurality of driving pump pieces along the infusion direction, the plurality of driving pump pieces being sequentially pressed to squeeze the fluid in the infusion pipeline to flow towards the infusion direction under the driving of the processor; the pressure sensor being configured to detect pressure inside the infusion pipeline and generate a corresponding pressure signal; the pressure anomaly detection apparatus comprising:

[0034] a first acquisition unit configured to acquire the pressure signal;

[0035] a first determination unit configured to determine that the pressure signal does not reach a preset pressure threshold by comparing the pressure signal with the preset pressure threshold;

[0036] a first alarm unit configured to output an alarm prompt information representing a pressure anomaly if it is determined according to the pressure signal that there is a pressure mutation during at least one driving pump piece alternation period when it is determined that the pressure signal does not reach the preset pressure threshold, wherein the driving pump piece alternation period refers to a switching period from when the last driving pump piece is driven to completely squeeze the infusion pipeline to when the first driving pump piece is driven to completely squeeze the infusion pipeline.

[0037] In a fourth aspect, the embodiments of the present application provide another pressure anomaly detection apparatus applied to an infusion pump, the infusion pump being configured to be used in cooperation with an infusion pipeline, the infusion pump being configured to drive fluid in the infusion pipeline to flow towards an infusion object; the infusion pump comprising a processor, a driving mechanism and a pressure sensor, the driving mechanism comprising a plurality of driving pump pieces arranged in sequence along an infusion direction, the driving pump pieces comprising a first driving pump piece and a last driving pump piece, the first driving pump piece and the last driving pump piece being respectively arranged at an uppermost position and a lowermost position of the plurality of driving pump pieces along the infusion direction, the plurality of driving pump pieces being sequentially pressed to squeeze the fluid in the infusion pipeline to flow towards the infusion direction under the driving of the processor; the pressure sensor comprising a downstream pressure sensor arranged in a downstream interval of the infusion pipeline relative to the driving mechanism, configured to detect downstream pressure inside the infusion pipeline and generate a corresponding downstream pressure signal; the pressure anomaly detection apparatus comprising:

[0038] a second acquisition unit configured to acquire the downstream pressure signal;

[0039] The second alarm unit is configured to determine, according to the downstream pressure signal, that there is a pressure jump during continuous driving-pump-plate alternation, and that there is a pressure gradually rising trend during movement of an adjacent intermediate driving-pump plate after each driving-pump-plate alternation, and output an alarm prompt information indicating that the downstream of the infusion pipeline is blocked, wherein the driving-pump-plate alternation refers to a switching period from when the last driving-pump plate is driven to completely extrude the infusion pipeline to when the first driving-pump plate is driven to completely extrude the infusion pipeline, and the intermediate driving-pump-plate movement refers to a period from when the first driving-pump plate is driven to completely extrude the infusion pipeline to when the last driving-pump plate is driven to completely extrude the infusion pipeline.

[0040] In a fifth aspect, an embodiment of the present application provides an infusion pump configured to drive fluid in an infusion pipeline to flow towards an infusion object, the infusion pump comprising a processor, a driving mechanism, a pressure sensor, a memory, and one or more programs, the driving mechanism comprising a plurality of driving-pump plates arranged in sequence along an infusion direction, the driving-pump plates comprising a first driving-pump plate and a last driving-pump plate, the first driving-pump plate and the last driving-pump plate being arranged at an uppermost position and a lowermost position along the infusion direction respectively, the plurality of driving-pump plates being configured to sequentially extrude the fluid in the infusion pipeline to flow towards the infusion direction under the driving of the processor, the pressure sensor being configured to detect pressure inside the infusion pipeline and generate a corresponding pressure signal, the one or more programs being stored in the memory and configured to be executed by the processor, the programs comprising instructions for performing steps in the method of any one of the first aspect or the second aspect.

[0041] In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium storing a computer program for electronic data exchange, wherein the computer program causes a computer to perform some or all of the steps described in the first aspect or the second aspect.

[0042] In a seventh aspect, the present application provides a computer program product, wherein the above computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to perform some or all of the steps described in the first aspect or the second aspect. The computer program product can be a software installation package.

[0043] In the embodiments of the present application, the infusion pump is used in cooperation with the infusion pipeline, the infusion pump can drive the fluid in the infusion pipeline to flow towards the infusion object; the infusion pump comprises a processor, a driving mechanism and a pressure sensor, the driving mechanism comprises a plurality of driving pump pieces arranged in sequence along the infusion direction, the driving pump pieces comprise a first driving pump piece and a last driving pump piece, the first driving pump piece and the last driving pump piece are respectively arranged at the most upstream position and the most downstream position of the plurality of driving pump pieces in the infusion direction, the plurality of driving pump pieces are sequentially pressed to the fluid in the infusion pipeline under the driving of the processor, so that the fluid flows towards the infusion direction; the pressure sensor is used for detecting the pressure inside the infusion pipeline and generating a corresponding pressure signal. Specifically, the infusion pump can obtain the pressure signal, compare the pressure signal with the preset pressure threshold value, determine that the pressure signal does not reach the preset pressure threshold value, and when it is determined that the pressure signal does not reach the preset pressure threshold value, if it is determined according to the pressure signal that there is a pressure mutation during the alternation of at least one driving pump piece, an alarm prompt information representing pressure abnormality is output. Therefore, the embodiments of the present application can identify whether there is a nonlinear blocking pressure abnormality while performing infusion linear blocking identification, thereby improving the accuracy of infusion pressure abnormality monitoring and protecting the life safety of the infusion object. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0045] Figure 1 is an application scenario diagram of a pressure abnormality detection method provided by the embodiments of the present application;

[0046] Figure 2 is a structural diagram of an infusion pump provided by the embodiments of the present application;

[0047] Figure 3 is a structural diagram of a driving mechanism provided by the embodiments of the present application;

[0048] Figure 4 is a structural diagram of another infusion pump provided by the embodiments of the present application;

[0049] Figure 5 is a flow diagram of a pressure abnormality detection method provided by the embodiments of the present application;

[0050] Figure 6 is a pressure change diagram provided by the embodiments of the present application;

[0051] Figure 7is another pressure change schematic diagram provided by an embodiment of the present application;

[0052] Figure 8 is a flow chart of a pressure anomaly detection method provided by an embodiment of the present application;

[0053] Figure 9 is another flow chart of a pressure anomaly detection method provided by an embodiment of the present application;

[0054] Figure 10 is a functional unit component block diagram of a pressure anomaly detection device provided by an embodiment of the present application;

[0055] Figure 11 is another functional unit component block diagram of a pressure anomaly detection device provided by an embodiment of the present application;

[0056] Figure 12 is another functional unit component block diagram of a pressure anomaly detection device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0057] In order to enable persons skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by persons skilled in the art without creative labor fall within the scope of protection of the present application.

[0058] The terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish different objects, and are not used to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or units inherent to the process, method, product or device.

[0059] In this document, the term "embodiment" means that the specific features, structures or characteristics described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily mean the same embodiment, nor is it independent or alternative to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0060] The embodiments of the present application will be described below with reference to the drawings.

[0061] Please refer to Figure 1 , Figure 1 An application scenario of a pressure anomaly detection method provided by an embodiment of the present application is shown in the figure. The application scenario includes an infusion pump and an infusion object.

[0062] The infusion object is a living being such as a human, an animal, or a plant.

[0063] The infusion pump is a medical device capable of accurately controlling the infusion speed and the infusion amount. The infusion pump is used in cooperation with an infusion pipeline to drive the fluid in the infusion pipeline to flow toward the infusion object. Specifically, one end of the infusion pipeline is used to connect a fluid container, and the other end is used to connect the infusion object. The fluid contained in the fluid container can be a medicinal liquid, blood, or a nutrient solution, or other substances used for infusion.

[0064] Specifically, referring to Figure 2 and Figure 3 , the infusion pump 200 includes a processor 210, a driving mechanism 220, and a pressure sensor 230.

[0065] The driving mechanism 220 includes a plurality of driving pump pieces arranged in sequence along the infusion direction, specifically including a first driving pump piece 211, a last driving pump piece 212, and a plurality of intermediate driving pump pieces between the first driving pump piece 211 and the last driving pump piece 212. Along the infusion direction, the first driving pump piece 211 and the last driving pump piece 212 are respectively located at the most upstream position and the most downstream position of all the driving pump pieces.

[0066] After the infusion is started, the processor drives the driving mechanism to perform peristaltic extrusion on the infusion pipeline, so that the fluid inside the infusion pipeline flows toward the infusion object. The process of peristaltic extrusion is roughly as follows: at the beginning of the infusion, the starting driving pump piece completely extrudes the infusion pipeline, and then the downstream driving pump pieces are sequentially switched to completely extrude the infusion pipeline, until the last driving pump piece completely extrudes the infusion pipeline, and then the first driving pump piece is switched to completely extrude the infusion pipeline, and then the intermediate driving pump pieces downstream of the first driving pump piece are sequentially switched to completely extrude the infusion pipeline, until the last driving pump piece completely extrudes the infusion pipeline, and the process is sequentially repeated.

[0067] The pump piece working cycle includes a driving pump piece alternation period and an intermediate driving pump piece movement period. The driving pump piece alternation period refers to the switching period from when the last driving pump piece is driven to completely extrude the infusion pipeline to when the first driving pump piece is driven to completely extrude the infusion pipeline. The intermediate driving pump piece movement period refers to the period from when the first driving pump piece is driven to completely extrude the infusion pipeline to when the last driving pump piece is driven to completely extrude the infusion pipeline.

[0068] The initial driving pump piece can be any one of the driving pump pieces, for example, it can be the first driving pump piece, which can be referred to Figure 3 The initial driving pump piece can also be the last driving pump piece, which can be referred to Figure 3 The initial driving pump piece can also be the intermediate driving pump piece, which can be referred to Figure 3

[0069] In some cases, in order to alleviate the occlusion pressure of the infusion pipeline and avoid unintended infusion, the processor can perform a back-pumping program, and the order of the processor controlling the driving of the pump pieces at this time is the order of sequentially pressing the driving pump pieces from the last driving pump piece 212 to the first driving pump piece 211.

[0070] The pressure sensor 230 is configured to detect the pressure inside the infusion pipeline and generate a corresponding pressure signal. The processor 210 is configured to control the driving of the plurality of driving pump pieces to sequentially press the fluid in the infusion pipeline. The processor 210 can also be configured to perform the following method to monitor the pressure anomaly caused by linear occlusion or nonlinear occlusion. Specifically, the occlusion can occur in the upstream or downstream of the infusion pipeline relative to the driving mechanism. In a specific implementation, the pressure sensor can also be an upper pressure sensor arranged in the upstream of the infusion pipeline relative to the driving mechanism, configured to detect the upstream pressure inside the infusion pipeline and generate a corresponding upstream pressure signal. Alternatively, the pressure sensor can include an upper pressure sensor and a lower pressure sensor to simultaneously detect the upstream pressure signal and the downstream pressure signal, so as to identify the upstream occlusion and the downstream occlusion, respectively.

[0071] Specifically, referring to Figure 4 The infusion pump 200 can further include a memory 240 and at least one or more programs 241. The one or more programs 241 are stored in the memory 240 and configured to be executed by the processor 210, and the one or more programs 241 include instructions for performing any of the steps in the following method embodiments. In a specific implementation, the processor 210 is configured to perform any of the steps in the following method embodiments. The infusion pump 200 can further include a communication interface 250 for realizing the communication connection between the infusion pump 200 and other devices (such as servers or terminal devices, etc.). When performing data transmission such as sending, receiving, etc., the processor 210 can selectively invoke the communication interface 250 to complete the corresponding operation. For example, the infusion pump 200 can send the alarm prompt information in the following method to the terminal device in communication connection with the infusion pump, such as a central station or an infusion workstation, etc., so that the operating personnel can also remotely learn about the pressure anomaly.

[0072] ​In practice, the infusion pump may also be equipped with a display and operating mechanisms (such as operation buttons or external mouse, keyboard, etc.) for human-machine interaction with the operator. Specifically, the display shows the current infusion rate, infusion volume, and alarm prompts. The operating mechanisms are used by the operator to adjust data such as the infusion rate and infusion volume.

[0073] Please see Figure 5 , Figure 5 This is a flowchart illustrating a pressure anomaly detection method provided in an embodiment of this application. This method is applied to, for example... Figures 1 to 4 The infusion pump shown is as follows: Figure 5 As shown, the pressure anomaly detection method includes the following steps:

[0074] S510, acquire the pressure signal.

[0075] The pressure signal is the data collected by the pressure sensor during the sampling period.

[0076] In some embodiments, the pressure sensor is a lower pressure sensor disposed in the downstream section of the infusion pipeline relative to the drive mechanism, used to detect the downstream pressure inside the infusion pipeline and generate a corresponding downstream pressure signal; in some embodiments, the pressure sensor is an upper pressure sensor disposed in the upstream section of the infusion pipeline relative to the drive mechanism, used to detect the upstream pressure inside the infusion pipeline and generate a corresponding upstream pressure signal.

[0077] S520, by comparing the pressure signal with a preset pressure threshold, it is determined that the pressure signal has not reached the preset pressure threshold.

[0078] The pressure threshold is a preset physical quantity value that triggers a linear blockage alarm based on real-time pressure. The preset pressure thresholds for the upstream and downstream pressure signals can be different; these are referred to below as the preset upstream pressure threshold and the preset downstream pressure threshold. The pressure threshold can be determined based on information about the infusion recipient (e.g., age, gender, or weight), the type of fluid being infused, and the requirements of the department using the infusion pump. The pressure threshold can be fixed or adaptively adjusted based on historical pressure values.

[0079] The real-time pressure value inside the infusion line is obtained by using a pressure signal. This real-time pressure value is compared with a preset pressure threshold to determine two situations: 1) If the real-time pressure value reaches or exceeds the pressure threshold, a pressure abnormality alarm (also referred to as a linear blockage alarm in this article) is triggered, and a corresponding alarm message is output; 2) If the real-time pressure value does not reach the pressure threshold, it is necessary to combine step S530 to further determine whether it is in a normal infusion state or in a blockage situation where no alarm has been triggered.

[0080] S530, when determining that the pressure signal does not reach the preset pressure threshold, if it is determined according to the pressure signal that there is a pressure mutation during the alternation of at least one driving pump sheet, output an alarm prompt information characterizing the pressure anomaly.

[0081] The driving pump sheet alternation period refers to the switching period from when the last driving pump sheet is driven to completely extrude the infusion pipeline to when the first driving pump sheet is driven to completely extrude the infusion pipeline according to the driving sequence.

[0082] The alarm prompt information can be output in the form of display screen display, speaker playback, lamp lighting or lamp flashing. The alarm prompt information can be used to characterize the pressure anomaly of the infusion pipeline, and its content can be the same as the alarm prompt information triggered when the pressure signal meets the preset pressure threshold; or it can be different. Specifically, the alarm prompt information can increase the prompt for the user to pay attention to the aging or elastic condition of the infusion pipeline on the basis of prompting the blockage or pressure anomaly of the infusion pipeline. Specifically, when the output form of the alarm is different, the two different prompt alarm information can be represented by the difference in display screen display content, speaker playback content, light color or flashing frequency.

[0083] In some embodiments, the determination of the pressure mutation during the alternation of at least one driving pump sheet according to the pressure signal comprises: determining at least one characteristic value according to the pressure signal, the characteristic type corresponding to the characteristic value including at least one of the average value, the standard deviation, the extreme value difference or the slope of the pressure during the alternation of the driving pump sheet; comparing each characteristic value with the threshold range corresponding thereto to obtain a comparison result; and determining whether there is a pressure mutation during the alternation of the driving pump sheet according to the comparison result.

[0084] The at least one characteristic value refers to the value of at least one characteristic type corresponding to the pressure during each driving pump sheet alternation period. Specifically, if the characteristic type configured for determining the pressure mutation is one, the at least one characteristic value is the value of a single characteristic type corresponding to the pressure during a single driving pump sheet alternation period; or the values of a single characteristic type corresponding to the pressure during each driving pump sheet alternation period in multiple driving pump sheet alternation periods. If the characteristic type configured for determining the pressure mutation is multiple (i.e. greater than or equal to two), the at least one characteristic value is the value of multiple characteristic types corresponding to the pressure during a single driving pump sheet alternation period; or the values of multiple characteristic types corresponding to the pressure during each driving pump sheet alternation period in multiple driving pump sheet alternation periods.

[0085] The specific value of the threshold range is determined according to the flow rate set by the infusion pump and the consumables of the infusion pipeline and the like. In actual application, a plurality of outputtable blockage levels can be configured according to the severity of the blockage. In this case, the blockage level is also a parameter that affects the specific value of the threshold range, and the threshold range corresponding to different blockage levels is different.

[0086] In a specific implementation, if the pressure value corresponding to any time in a single working period (i.e., the real-time pressure value corresponding to the time) does not exceed the preset pressure threshold value, the characteristic values and the like corresponding to the driving pump sheet alternation period in the working period can be directly calculated after all the pressure values in the working period are collected, and it is determined whether there is a pressure mutation in the driving pump sheet alternation period. Alternatively, the characteristic values and the like corresponding to the driving pump sheet alternation period in a plurality of (such as two or three) working periods can be calculated respectively after the pressure values in the working periods are collected, and it is determined whether there is a pressure mutation in each driving pump sheet alternation period.

[0087] In a specific implementation, each feature type (i.e., average value, standard deviation, extreme value difference (i.e., difference between maximum value and minimum value), or slope) in the driving pump sheet alternation period is respectively configured with a threshold range. When it is determined whether there is a pressure mutation in each driving pump sheet alternation period, the characteristic value corresponding to each feature type in the single driving pump sheet alternation period and the threshold range corresponding thereto are compared to determine whether there is a pressure mutation according to the size relationship between the characteristic value and the threshold range. Specifically, when the feature type used to identify the pressure mutation is one, it is determined that there is a pressure mutation when the characteristic value corresponding to the feature type is within the threshold range corresponding thereto. When the feature type used to identify the pressure mutation is multiple, it is determined that there is a pressure mutation when the characteristic values corresponding to at least two feature types in the multiple feature types are within the threshold ranges corresponding thereto. For example, if the feature types used to identify the pressure mutation include the average value, the standard deviation, the extreme value difference, and the slope in the driving pump sheet alternation period, it is determined that there is a pressure mutation when the characteristic value corresponding to the average value in the driving pump sheet alternation period and the characteristic value corresponding to the slope are within the threshold ranges corresponding thereto. In this way, the accuracy of pressure mutation identification can be improved by determining the pressure mutation through multiple feature types.

[0088] It can be seen that, in the present example, the characteristic value is determined according to the pressure signal, and then the comparison result is obtained by comparing the characteristic value and the corresponding threshold range, so that it is determined whether there is a pressure mutation according to the comparison result, which can improve the simplicity of pressure mutation identification. Meanwhile, the multiple selection of the feature type of the characteristic value improves the flexibility of pressure mutation identification.

[0089] In some embodiments, the determining, according to the comparison result, whether there is a pressure mutation during the alternating of the driving pump sheet comprises: if there are multiple feature types, determining that there is a pressure mutation when the feature values corresponding to each feature type are all within the corresponding threshold range according to the comparison result.

[0090] In specific implementations, if the feature types used to identify the pressure mutation include multiple feature types, the pressure mutation can be determined when the feature values corresponding to the multiple feature types are all within the corresponding threshold range. For example, in the case of a BELLON infusion device, the slope, standard deviation, and extreme value difference during the alternating of the driving pump sheet can be used to identify the pressure mutation, where the threshold range corresponding to the slope is (5, +∞), the threshold range corresponding to the extreme value difference is (30, +∞), and the threshold range corresponding to the standard deviation is (8, +∞). When the slope, the extreme value difference, and the standard deviation during the alternating of a single driving pump sheet are all greater than 5, 30, and 8 respectively, it is determined that there is a pressure mutation during the alternating of the driving pump sheet.

[0091] In specific implementations, if the feature types used to identify the pressure mutation include multiple feature types, the feature value corresponding to one of the feature types during the alternating of the driving pump sheet can be calculated first, and then the feature value is compared with the threshold range corresponding to the feature type. When the feature value is within the threshold range, the feature value corresponding to another feature type during the alternating of the driving pump sheet is calculated. In this way, the calculation and comparison of the feature values of all feature types during the alternating of the driving pump sheet are completed through a round-robin cycle, and the calculation is stopped in time when a feature value is not within the corresponding threshold range, thereby saving computing power. Alternatively, in specific implementations, if the feature types used to identify the pressure mutation include multiple feature types, the feature values corresponding to each feature type during the alternating of a single driving pump sheet can be calculated directly first, and then the feature values corresponding to the multiple feature types are compared with the threshold ranges corresponding to the feature types simultaneously, thereby improving the identification efficiency. Alternatively, in combination with the description in Figure 8 , if the feature types used to identify the pressure mutation include multiple feature types, the feature values corresponding to each feature type during the alternating of a single driving pump sheet can be calculated directly first, and then the comparison is performed to determine whether the feature value corresponding to a feature type is within the threshold range corresponding to the feature type. When the feature value is within the threshold range, the comparison of the next feature value is performed. In this way, the comparison of the feature values corresponding to the multiple feature types is completed in sequence, and the calculation is stopped in time when a feature value is not within the corresponding threshold range, thereby not only improving the calculation efficiency but also saving computing power.

[0092] As can be seen, in the present example, when the feature types corresponding to the feature values include multiple feature types, the feature values corresponding to each feature type are compared with the threshold ranges corresponding to the feature types, and it is determined that there is a pressure mutation when the feature values are all within the corresponding threshold ranges, thereby improving the accuracy of the identification of the pressure mutation and reducing the probability of false positives.

[0093] It can be seen that the application is convenient and efficient in identifying pressure abnormal conditions caused by linear blockage by comparing the real-time pressure value with the pressure threshold value, and most of the infusion pipeline blockage conditions can be identified. On this basis, further identification of whether there is a pressure abnormal condition caused by non-linear blockage by identifying the pressure mutation during the alternating period of the driving pump sheet is beneficial to improve the comprehensiveness and accuracy of the infusion pressure abnormality monitoring, and to protect the life safety of the infusion object.

[0094] In some embodiments, each time the processor determines that the real-time pressure value in the pressure signal does not reach the preset pressure threshold value, it can further determine whether there is a pressure mutation during the alternating period of at least one driving pump sheet according to the pressure signal, to further judge whether there is a blockage but the linear blockage alarm is not triggered (hereinafter referred to as non-linear blockage) condition, to improve the accuracy of pressure abnormality identification.

[0095] For the downstream interval of the infusion pipeline relative to the driving mechanism, in some embodiments, when it is determined that the real-time pressure value in the downstream pressure signal does not reach the preset downstream pressure threshold value, it is determined whether the current is in the pressure fluctuation stage according to the downstream pressure signal, and when it is determined that there is a pressure mutation during the alternating period of at least one driving pump sheet in the pressure fluctuation stage, an alarm prompt information representing the pressure abnormality caused by non-linear blockage is output, which is beneficial to improve the accuracy of pressure abnormality identification.

[0096] In a specific implementation, under normal infusion conditions, the downstream pressure signal will gradually tend to be stable after the pressure rises. Among them, the change of the pressure signal when the pressure signal rises can refer to the pressure rising stage in Figure 6 When it tends to be stable, the change of the pressure signal will slightly fluctuate around a certain pressure signal value, which tends to be a straight line change in the corresponding signal change graph (not shown). For reference, see Figure 6 Under the condition of non-linear blockage, the change of the downstream pressure signal can include the pressure rising stage and the pressure fluctuation stage. The pressure fluctuation stage refers to the period in which the data of multiple consecutive working cycles in the downstream pressure signal changes periodically. The pressure rising stage refers to the stage in which the downstream pressure signal continuously rises. Specifically, after starting infusion, the obtained downstream pressure signal will change in an upward trend as shown in the pressure rising stage in Figure 6 With the change of infusion time, if the infusion pipeline has a pressure abnormality caused by non-linear blockage, the downstream pressure signal will change periodically as shown in the pressure fluctuation stage in Figure 6

[0097] ​Specifically, the manner of determining whether the current is in the pressure fluctuation phase according to the downstream pressure signal can be: determining the pressure average value of each working cycle according to the downstream pressure signal, and comparing with the pressure average value of at least one adjacent working cycle, if the difference between the average values is less than a preset difference value, it is determined that the current is in the pressure fluctuation phase. For example, in combination with Figure 6 It can be seen that the pressure average values of the working cycles corresponding to 200s to 245s and 245s to 290s are relatively close, and the difference between the pressure average values is less than a preset difference value (such as 20, which can be set according to actual needs). As can be seen from the pressure signal shown in FIG. 2, the working cycles corresponding to 200s to 290s are at least part of the pressure fluctuation phase. Figure 6 It can be seen that the pressure average values of the working cycles corresponding to 200s to 245s and 245s to 290s are relatively close, and the difference between the pressure average values is less than a preset difference value (such as 20, which can be set according to actual needs). As can be seen from the pressure signal shown in FIG. 2, the working cycles corresponding to 200s to 290s are at least part of the pressure fluctuation phase.

[0098] In some embodiments, whether the current is in the pressure fluctuation phase can also be determined according to the maximum extreme pressure and the minimum extreme pressure of each working cycle in the downstream pressure signal. Specifically, the difference between the maximum extreme pressure of the adjacent two working cycles and the difference between the minimum extreme pressure of the adjacent two working cycles can be calculated respectively, and when the difference between the maximum extreme pressure of the adjacent two working cycles is less than a first preset value, and the difference between the minimum extreme pressure of the adjacent two working cycles is less than a second preset value, it is determined that there is a pressure fluctuation phase, to realize the identification of the pressure fluctuation phase. For example, in combination with Figure 6 , the maximum extreme pressure of the working cycles corresponding to 200s to 245s and 245s to 290s is relatively close, and the difference is less than a first preset value (such as 10, which can be set according to actual needs). The minimum extreme pressure of the working cycles corresponding to 200s to 245s and 245s to 290s is also relatively close, and the difference is less than a second preset value (such as 10, which can be set according to actual needs). As can be seen from the pressure signal shown in FIG. 2, the working cycles corresponding to 200s to 290s are in the pressure fluctuation phase, and the pressure signal between 200s to 290s is part of the data in the pressure fluctuation phase. Figure 6 It can be seen that the pressure average values of the working cycles corresponding to 200s to 245s and 245s to 290s are relatively close, and the difference between the pressure average values is less than a preset difference value (such as 20, which can be set according to actual needs). As can be seen from the pressure signal shown in FIG. 2, the working cycles corresponding to 200s to 290s are at least part of the pressure fluctuation phase.

[0099] In a specific implementation, the manner of determining whether the current is in the pressure fluctuation phase according to the average value of the working cycle, and the manner of determining whether the current is in the pressure fluctuation phase according to the maximum extreme pressure and the minimum extreme pressure of the working cycle can be combined to be applied, to further improve the accuracy of the identification of the pressure fluctuation phase. For example, on the basis of determining whether the current is in the pressure fluctuation phase according to the pressure average value of the working cycle, it is further determined whether the current is in the pressure fluctuation phase according to the maximum extreme pressure and the minimum extreme pressure of the working cycle.

[0100] In practical applications, when it is determined that the downstream pressure signal does not reach the preset downstream pressure threshold, the current pressure fluctuation stage can be determined according to the downstream pressure signal, and the order in which the pressure mutation exists during the alternation of at least one driving pump piece in the pressure fluctuation stage can be determined according to the downstream pressure signal. In order to improve the accuracy of identifying the case that the pressure anomaly is caused by nonlinear blockage, the calculation order can be: at the same time of calculating whether the current is in the pressure fluctuation stage according to the downstream pressure signal, whether the pressure mutation exists during the alternation of at least one driving pump piece in the pressure fluctuation stage is calculated. Or, in practical applications, the calculation order can also be: first, calculate whether the current is in the pressure fluctuation stage according to the downstream pressure signal, and then, after determining that the current is in the pressure fluctuation stage, calculate whether the pressure mutation exists during the alternation of at least one driving pump piece in the pressure fluctuation stage according to the downstream pressure signal. In order to improve the accuracy of identifying the case that the pressure anomaly is caused by nonlinear blockage, while saving computing power. Of course, in practical applications, the calculation order can also be: first, calculate whether the pressure mutation exists during the alternation of at least one driving pump piece according to the downstream pressure signal, and then, calculate whether the driving pump piece alternation period with pressure mutation is in the pressure fluctuation stage according to the downstream pressure signal. This is not further limited.

[0101] For example, if the real-time pressure value does not exceed the preset downstream pressure threshold, the processor can calculate whether the pressure mutation exists during the alternation of the driving pump piece in the current working period after the pressure value collection of the current working period in which the real-time pressure value is located is completed, and record when the pressure mutation exists. At the same time, the processor also calculates the average value or the maximum and minimum extreme value of the current working period, and determines whether the current is in the pressure fluctuation stage after calculating the average value or the maximum and minimum extreme value of at least two working periods (such as the current working period and the previous working period adjacent to the current working period). When it is determined that the current working period is in the pressure fluctuation stage, and the driving pump piece alternation period in the current working period exists pressure mutation, the warning prompt information of the nonlinear blockage in the downstream interval can be output.

[0102] In some embodiments, when it is determined that the real-time pressure value in the downstream pressure signal does not reach the preset downstream pressure threshold, the current pressure fluctuation stage can also be determined according to the downstream pressure signal, and when it is determined that the pressure mutation exists during the alternation of at least one driving pump piece in the pressure fluctuation stage, and the pressure gradually rises during the movement of the adjacent intermediate driving pump piece after the pressure mutation, the alarm prompt information representing that the pressure anomaly is caused by nonlinear blockage can be output, so as to further improve the accuracy of pressure anomaly identification.

[0103] In specific implementations, after determining that there is a pressure mutation during at least one driving pump blade alternation period in the pressure fluctuation stage calculated according to the downstream pressure signal, the pressure during the movement of the adjacent intermediate driving pump blade after the driving pump blade alternation period with the pressure mutation can be further analyzed. The analysis method can be: extracting the pressure values at multiple times during the movement of the adjacent intermediate driving pump blade, and comparing the pressure values at adjacent two times to determine whether the pressure value changes in an upward trend over time. The multiple times can be all or part of the times during the movement of the adjacent intermediate driving pump blade, which can be set according to requirements. Alternatively, the analysis method can be: dividing the movement of the adjacent intermediate driving pump blade into multiple time periods, calculating the average pressure of each time period, and comparing the average pressure of adjacent time periods to determine whether the pressure value changes in an upward trend over time, so as to improve the accuracy of trend identification. Alternatively, the analysis method can also be: drawing a time sequence diagram of the downstream pressure signal changing over time, and confirming whether the pressure during the movement of the adjacent intermediate driving pump blade changes in an upward trend by image analysis of the graph corresponding to the movement of the adjacent intermediate driving pump blade in the time sequence diagram. For example, the graph corresponding to the movement of the intermediate driving pump blade can be seen from the image corresponding to 245s to 290s. Figure 6

[0104] In some embodiments, when it is determined that the real-time pressure value in the downstream pressure signal does not reach the preset downstream pressure threshold, it can also be determined according to the downstream pressure signal whether the current is in the pressure fluctuation stage, and when it is determined that there is a pressure mutation during at least one driving pump blade alternation period in the pressure fluctuation stage, and the pressure mutation during the driving pump blade alternation period is a pressure drop and the drop slope is greater than or equal to 4, an alarm prompt information representing pressure abnormality caused by nonlinear blockage is output, which is beneficial to further improve the accuracy of identification of pressure abnormality caused by nonlinear blockage.

[0105] In specific implementations, according to the above analysis method of determining whether the pressure during the movement of the adjacent intermediate driving pump blade after the driving pump blade alternation period changes in an upward trend, it can be analogously determined whether the pressure during the driving pump blade alternation period with the pressure mutation changes in a downward trend, and the specific analysis process will not be described here. Meanwhile, the processor can calculate the slope during the driving pump blade alternation period with the pressure mutation, that is, calculate the value of the extreme difference during the driving pump blade alternation period divided by the time length of the driving pump blade alternation period, and then compare the slope with the preset range [4, +∞) to determine whether the slope is greater than or equal to 4. By setting the preset range to [4, +∞), the case that the pressure mutation is not obvious when the drop slope is too small can be excluded, and the reliability of pressure abnormality identification can be improved.

[0106] ​In actual applications, after determining that the driving pump plate alternation period in which the pressure fluctuation stage exists has a pressure mutation, it can be determined according to the downstream pressure signal whether the pressure in the driving pump plate alternation period decreases, and when it is determined that the pressure decreases, it is calculated according to the downstream pressure signal whether the slope in the driving pump plate alternation period is greater than or equal to 4, so as to save computing power. Alternatively, after determining that the driving pump plate alternation period in which the pressure fluctuation stage exists has a pressure mutation, it can also be determined according to the downstream pressure signal whether the pressure in the driving pump plate alternation period decreases, and whether the slope in the driving pump plate alternation period is greater than or equal to 4 is calculated, so as to improve the identification efficiency.

[0107] In some embodiments, when it is determined that the real-time pressure value in the downstream pressure signal does not reach the preset downstream pressure threshold, it can also be determined according to the downstream pressure signal whether the current is in a pressure fluctuation stage, and when it is determined that in the pressure fluctuation stage, there is a pressure mutation in the continuous multiple driving pump plate alternation periods, an alarm prompt information representing that the pressure anomaly is caused by nonlinear blockage is output, which is beneficial to further improve the accuracy of pressure anomaly identification and reduce the occurrence of identification errors caused by accidental pressure mutation.

[0108] In specific implementations, the manner of determining that there is a pressure mutation in the continuous multiple driving pump plate alternation periods in the pressure fluctuation stage according to the downstream pressure signal is as follows: it is determined according to the downstream pressure signal that there is a pressure mutation in the continuous first preset number of driving pump plate alternation periods. Among them, the first preset number is greater than or equal to the second preset number. For example, in the pressure fluctuation stage, there is a pressure mutation in 3 driving pump plate alternation periods in the continuous 3 driving pump plate alternation periods. Alternatively, for example, in the pressure fluctuation stage, there is a pressure mutation in 2 driving pump plate alternation periods in the continuous 3 driving pump plate alternation periods. In actual applications, in order to improve the accuracy of pressure anomaly identification, the second preset number can be set to be equal to the first preset number, that is, it is determined according to the downstream pressure signal that there is a pressure mutation in each driving pump plate alternation period in the continuous multiple driving pump plate alternation periods.

[0109] In specific implementations, when it is determined according to the downstream pressure signal that there is a pressure mutation in the continuous multiple driving pump plate alternation periods in the pressure fluctuation stage, it can be determined at the same time whether there is a pressure mutation in each driving pump plate alternation period in the continuous multiple driving pump plate alternation periods in the pressure fluctuation stage. Alternatively, when it is determined that there is a pressure mutation in one driving pump plate alternation period in the pressure fluctuation stage, it can be determined whether there is a pressure mutation in other driving pump plate alternation periods continuous with the driving pump plate alternation period. The specific setting can be made according to the requirements, which will not be further described here.

[0110] In view of the above, in the identification process of the pressure abnormality caused by the nonlinear blockage of the infusion pipeline in the downstream section of the driving mechanism, when it is determined that the real-time pressure value in the downstream pressure signal does not reach the preset downstream pressure threshold, it is determined that the current is in the pressure fluctuation stage according to the downstream pressure signal, and there is a pressure mutation during the alternating period of at least one driving pump piece in the pressure fluctuation stage, at least one of the following conditions can be further determined to further optimize the accuracy of the identification of the downstream pressure abnormality caused by the nonlinear blockage. The specific conditions are: 1) whether the adjacent intermediate driving pump movement period after the driving pump piece alternation period with pressure mutation in the pressure fluctuation stage exists according to the determination of the downstream pressure signal; 2) whether the pressure mutation during the driving pump piece alternation period in the pressure fluctuation stage is decreased and the descending slope is greater than or equal to 4 according to the determination of the downstream pressure signal; 3) whether there is a pressure mutation during the continuous driving pump piece alternation period in the pressure fluctuation stage according to the determination of the downstream pressure signal.

[0111] For the upstream section of the infusion pipeline relative to the driving mechanism, in some embodiments, when it is determined that the real-time pressure value in the upstream pressure signal does not reach the preset upstream pressure threshold, the existence of pressure mutation during the continuous driving pump piece alternation period is determined according to the upstream pressure signal, and the alarm prompt information indicating the pressure abnormality caused by the nonlinear blockage is output to improve the accuracy of the identification of the upstream pressure abnormality caused by the nonlinear blockage.

[0112] Specifically, according to the upstream pressure signal, the determination of the existence of pressure mutation during the continuous driving pump piece alternation period is as follows: according to the upstream pressure signal, it is determined that there is pressure mutation during the continuous third preset number of driving pump piece alternation periods. The fourth preset number of driving pump piece alternation periods. For example, according to the upstream pressure signal, it is determined that there is pressure mutation during 4 driving pump piece alternation periods in the continuous 4 driving pump piece alternation periods. Or, for example, according to the upstream pressure signal, it is determined that there is pressure mutation during 2 driving pump piece alternation periods in the continuous 4 driving pump piece alternation periods.

[0113] Specifically, in combination with the above Figure 7 Since the direction of the pressure mutation during the driving pump piece alternation period in the upstream pressure signal can be uncertain, the pressure mutation includes two cases of pressure rise and / or pressure drop. In a specific implementation, when it is determined that there is pressure mutation during the continuous driving pump piece alternation period according to the upstream pressure signal, it can be further determined whether the slope corresponding to the pressure mutation is greater than or equal to 4 to filter out other mutation cases with too small slope, which can improve the accuracy of the upstream pressure abnormality identification.

[0114] For example, when the upstream blockage occurs, the change process of the upstream pressure signal collected by the upstream pressure sensor in real time is as shown in Figure 7 As shown, after the infusion is started, the upstream pressure signal will change in a downward trend. Specifically, during the entire infusion process, the processor will compare the real-time pressure value with the preset upstream pressure threshold corresponding to the downstream pressure signal. If the real-time pressure value exceeds the preset upstream pressure threshold, an alarm prompt information indicating that the linear blockage occurs in the upstream interval is output. If the real-time pressure value does not exceed the pressure threshold, the processor will calculate whether there is a pressure mutation during the driving pump sheet alternation in the current working period, and record when the pressure mutation exists. If the pressure mutation occurs during the driving pump sheet alternation for a plurality of continuous working periods, a pre-warning prompt information indicating that the nonlinear blockage occurs in the upstream interval is output.

[0115] In some embodiments, when it is determined that the real-time pressure value in the upstream pressure signal does not reach the preset upstream pressure threshold, an alarm prompt information indicating that the pressure anomaly is caused by the nonlinear blockage is output when it is determined that there is a pressure mutation during the driving pump sheet alternation for a plurality of continuous working periods according to the upstream pressure signal, and it is determined that the upstream pressure signal changes in a downward trend. This can further improve the accuracy of identifying the pressure anomaly caused by the nonlinear blockage in the upstream interval, and avoid the problem of identification error caused by accidental pressure mutation.

[0116] In a specific implementation, the pressure average value of each working period in the downstream pressure signal can be calculated to determine whether the upstream pressure signal changes in a downward trend according to the pressure average values of different working periods. For example, if the pressure average value of the first working period in a plurality of continuous working periods is greater than the pressure average value of the last working period, it is determined that the upstream pressure signal changes in a downward trend. Alternatively, the pressure average values of adjacent working periods can be compared. If the pressure average value of the last working period in a plurality of continuous working periods is greater than the pressure average value of the next working period, it is determined that the pressure changes in a downward trend.

[0117] In practical applications, when the infusion pump is provided with both the upper pressure sensor and the lower pressure sensor, the upstream pressure signal and the downstream pressure signal can be monitored simultaneously in the manner described in any of the above embodiments, so as to identify the upstream occlusion and the downstream occlusion respectively. In some embodiments, before the upstream pressure signal or the downstream pressure signal is acquired and detected, the pump door state of the infusion pump can also be detected. If the pump door state is not closed, the parameters can be initialized, and the pump door state can be detected again after the parameters are initialized. If the pump door state is closed, the corresponding pressure signal can be acquired. The parameters initialized include the threshold range of each feature type (such as the slope, the average value, the standard deviation, or the extreme value difference) for determining the pressure mutation, and the preset upstream pressure threshold and the preset downstream pressure threshold for linear occlusion identification. For example, the initialization of the parameters can refer to reacquiring the flow rate set by the infusion pump and the model or consumables of the infusion pipeline, and calculating and updating the threshold range of each feature type for determining the pressure mutation according to the reacquired information. In this embodiment, by detecting the pump door state and then performing the pressure signal detection, the accuracy of the occlusion detection can be ensured, and the safety of the infusion can be improved.

[0118] In some embodiments, before the upstream pressure signal or the downstream pressure signal is acquired and detected, whether the driving speed of the driving structure in the infusion pump changes can also be detected. If it is determined that the driving speed changes, the parameters can be initialized, the driving speed can be detected again, and the threshold range of each feature type for determining the pressure mutation can be calculated and updated according to the reacquired driving speed. If it is determined that the driving speed does not change, the corresponding pressure signal can be acquired. The driving speed can be adjusted by an operator. In this embodiment, by further detecting whether the driving speed changes, whether the threshold range of each feature type for determining the pressure mutation currently set is suitable for the current infusion scene can be checked, which is beneficial to improve the accuracy of the occlusion detection.

[0119] In some embodiments, after identifying the pressure abnormality according to the upstream pressure signal or the downstream pressure signal, i.e., after outputting the alarm prompt information of the linear blockage causing the pressure abnormality or the alarm prompt information of the nonlinear blockage causing the pressure abnormality, if it is detected that the pressure abnormality has been removed, the setting parameters can also be initialized to perform a new round of monitoring on the infusion state. At this time, initializing the setting parameters can also include clearing the identification statistical data of the pressure jump and recalculating according to the newly collected pressure signal. For example, for the upstream section of the infusion pipeline relative to the driving mechanism, after the blockage is removed, the recorded data of the continuous multiple pressure jumps can be cleared, and the recording and statistics of the pressure jump can be performed again. Alternatively, after the pressure abnormality is removed, initializing the setting parameters can further include clearing all data collected and / or counted before the blockage is removed in the current infusion process, and collecting and recording the pressure signal after the blockage is removed. For example, if the pump door is opened or the infusion pipeline is reconnected to the infusion object during the blockage removal process, all data in the current infusion process can be cleared, and new pressure signals can be collected and recorded in the infusion process after the blockage is removed.

[0120] For reference Figure 8 In actual application, when starting the infusion, the infusion pump can first detect the pump door state, initialize the setting parameters when the pump door state is not closed, and further detect whether the driving speed changes when the pump door state is closed. If the driving speed changes, initialize the setting parameters, and if the driving speed does not change, real-time collection of the pressure signal can be performed to identify the pressure abnormality according to the pressure signal. During the infusion process, the infusion pump can also monitor the pump door state and the driving speed of the infusion pump in real time to initialize the setting parameters when the closed state is not closed or the driving speed changes, so as to improve the accuracy of the blockage detection and ensure the safety of the infusion.

[0121] In some embodiments, for the pressure abnormality detection of the downstream section of the infusion pipeline relative to the driving mechanism, the infusion pump can also directly determine to output the alarm prompt information of the nonlinear blockage causing the pressure abnormality when the pressure jump exists during the alternating of at least one driving pump piece according to the downstream pressure signal after the downstream pressure signal is collected, so as to improve the identification efficiency of the nonlinear blockage causing the pressure abnormality.

[0122] In some embodiments, when it is determined that there is a pressure mutation during at least one driving pump sheet alternation according to the downstream pressure signal and a nonlinear blockage caused pressure abnormality alarm prompt information is output, the downstream pressure signal can be further used to determine at least one of the following conditions to improve the accuracy of identifying the condition of the downstream pressure abnormality caused by the nonlinear blockage. The specific conditions include: 1) determining whether the current is in a pressure fluctuation stage; 2) determining whether there is a pressure mutation during continuous driving pump sheet alternations; 3) determining whether the adjacent intermediate driving pump movement after the driving pump sheet alternation during which the pressure mutation occurs is rising; and 4) determining whether the pressure mutation is falling and the falling slope is greater than or equal to 4.

[0123] For example, refer to Figure 9 , Figure 9 is a flowchart of another pressure abnormality detection method provided by the embodiments of the present application. The method is applied to an infusion pump as shown in Figures 1 to 4 , and the pressure abnormality detection method includes the following steps as shown in Figure 9 .

[0124] Step S910: acquiring the downstream pressure signal.

[0125] Step S920: determining, according to the downstream pressure signal, that there is a pressure mutation during continuous driving pump sheet alternations, and that there is a pressure gradually rising trend during the adjacent intermediate driving pump sheet movement after each driving pump sheet alternation during which the pressure mutation occurs, and then outputting an alarm prompt information representing the downstream blockage of the infusion pipeline.

[0126] Specifically, the analysis and determination process of determining whether there is a pressure mutation during continuous driving pump sheet alternations according to the downstream pressure signal, and the specific analysis and determination process of determining whether there is a pressure gradually rising trend during the adjacent intermediate driving pump sheet movement after each driving pump sheet alternation during which the pressure mutation occurs, can refer to the analysis and determination process of the downstream pressure signal in the above-mentioned determination of whether the downstream pressure signal reaches the preset downstream pressure threshold, which will not be further described here.

[0127] It can be seen that, in the present embodiment, whether the downstream section of the infusion pipeline relative to the driving mechanism is blocked nonlinearly is identified by directly determining whether there is a pressure mutation during continuous driving pump sheet alternations, and determining whether there is a pressure gradually rising trend during the adjacent intermediate driving pump sheet movement after each driving pump sheet alternation during which the pressure mutation occurs. Compared with the existing way of identifying pressure abnormalities by using a preset downstream pressure threshold, the situation of blockage occurring without alarm can be avoided, the accuracy of infusion abnormality monitoring is improved, and the life safety of the infusion object is ensured. At the same time, it is also beneficial to improve the efficiency of nonlinear blockage identification.

[0128] Alternatively, for example, after obtaining the downstream pressure signal, the pressure fluctuation phase can also be determined directly according to the downstream pressure signal; and in the pressure fluctuation phase, when it is determined from the downstream pressure signal that there is a pressure jump during the continuous driving pump piece alternation, and there is a pressure gradually rising trend during the movement of the adjacent intermediate driving pump piece after the driving pump piece alternation period of each pressure jump, an alarm prompt information representing the blockage of the downstream of the infusion pipeline is output, so as to improve the efficiency of identifying the non-linear blockage in the downstream interval, improve the accuracy of identification, save the computing power, and reduce the processing pressure of the processor. The analysis and determination process of the pressure fluctuation phase can refer to the content of determining the pressure fluctuation phase when the downstream pressure signal does not reach the preset downstream pressure threshold in the foregoing, and will not be described further here.

[0129] In accordance with the above-mentioned embodiments, please refer to Figure 10 , Figure 10 is a functional unit composition block diagram of a pressure anomaly detection device provided by the embodiments of the present application. The pressure anomaly detection device 1000 is applied to an infusion pump. The infusion pump is used in cooperation with an infusion pipeline. The infusion pump is used to drive the fluid in the infusion pipeline to flow in the direction of the infusion object. The infusion pump includes a processor, a driving mechanism, and a pressure sensor. The driving mechanism includes a plurality of driving pump pieces arranged in sequence in the infusion direction. The driving pump pieces include a first driving pump piece and a last driving pump piece. The first driving pump piece and the last driving pump piece are respectively arranged at the most upstream position and the most downstream position of the plurality of driving pump pieces in the infusion direction. The plurality of driving pump pieces are sequentially extruded to the fluid in the infusion pipeline under the driving of the processor, so that the fluid flows in the infusion direction. The pressure sensor is used to detect the pressure inside the infusion pipeline and generate a corresponding pressure signal. The pressure anomaly detection device 1000 includes:

[0130] A first acquisition unit 1010 is configured to acquire the pressure signal.

[0131] A first determination unit 1020 is configured to determine that the pressure signal does not reach a preset pressure threshold by comparing the pressure signal with the preset pressure threshold.

[0132] A first alarm unit 1030 is configured to output an alarm prompt information representing a pressure anomaly when it is determined that the pressure signal does not reach the preset pressure threshold, and if it is determined from the pressure signal that there is a pressure jump during the driving pump piece alternation period. The driving pump piece alternation period refers to the switching period from when the last driving pump piece is driven to completely extrude the infusion pipeline to when the first driving pump piece is driven to completely extrude the infusion pipeline.

[0133] In some embodiments, the first alarm unit is further configured to, after the pressure signal is acquired, determine whether the pressure signal reaches a preset pressure threshold by comparing the pressure signal with the preset pressure threshold; and output an alarm prompt information representing pressure abnormality when it is determined that the pressure signal reaches the preset pressure threshold.

[0134] In some embodiments, in the case that, when it is determined that the pressure signal does not reach the preset pressure threshold, the first alarm unit is configured to output the alarm prompt information representing pressure abnormality if it is determined from the pressure signal that there is a pressure mutation during the alternation of at least one driving vane, the first alarm unit is specifically configured to: determine a pressure fluctuation phase from the pressure signal; and output the alarm prompt information representing pressure abnormality when it is determined that the pressure signal does not reach the preset pressure threshold and in the pressure fluctuation phase, it is determined from the pressure signal that there is a pressure mutation during the alternation of at least one driving vane.

[0135] In some embodiments, in the case that, when it is determined that the pressure signal does not reach the preset pressure threshold and in the pressure fluctuation phase, the first alarm unit is configured to output the alarm prompt information representing pressure abnormality if it is determined from the pressure signal that there is a pressure mutation during the alternation of at least one driving vane, the first alarm unit is further configured to: output the alarm prompt information representing pressure abnormality when it is determined that the pressure signal does not reach the preset pressure threshold and in the pressure fluctuation phase, it is determined from the pressure signal that there is a pressure mutation during the alternation of at least one driving vane, and the pressure gradually rises during the adjacent intermediate driving vane movement period after the pressure mutation; wherein the intermediate driving vane movement period refers to the period from when the first driving vane is driven to fully squeeze the infusion pipeline to when the last driving vane is driven to fully squeeze the infusion pipeline.

[0136] In some embodiments, the pressure mutation is a pressure drop with a drop slope greater than or equal to 4.

[0137] In some embodiments, in the case that, when it is determined that the pressure signal does not reach the preset pressure threshold and in the pressure fluctuation phase, the first alarm unit is configured to output the alarm prompt information representing pressure abnormality if it is determined from the pressure signal that there is a pressure mutation during the alternation of at least one driving vane, and the pressure gradually rises during the adjacent intermediate driving vane movement period after the pressure mutation, the first alarm unit is further configured to: output the alarm prompt information representing pressure abnormality when it is determined that the pressure signal does not reach the preset pressure threshold and in the pressure fluctuation phase, it is determined from the pressure signal that there is a pressure mutation during the alternation of at least one driving vane, and the pressure gradually rises during the adjacent intermediate driving vane movement period after the pressure mutation; wherein the intermediate driving vane movement period refers to the period from when the first driving vane is driven to fully squeeze the infusion pipeline to when the last driving vane is driven to fully squeeze the infusion pipeline.

[0138] In some embodiments, in the aspect of determining whether there is a pressure mutation during the alternating of at least one driving pump sheet according to the pressure signal, the first alarm unit is specifically further configured to: determine at least one feature value according to the pressure signal, wherein the feature type corresponding to the feature value comprises at least one of the average value, the standard deviation, the extreme difference, or the slope of the pressure during the alternating of the driving pump sheet; compare each feature value with the threshold range corresponding thereto to obtain a comparison result; and determine whether there is a pressure mutation during the alternating of the driving pump sheet according to the comparison result.

[0139] In some embodiments, in the aspect of determining whether there is a pressure mutation during the alternating of at least one driving pump sheet according to the comparison result, the first alarm unit is specifically further configured to: if there are multiple feature types, determine that there is a pressure mutation when the feature value corresponding to each feature type is within the corresponding threshold range according to the comparison result.

[0140] In some embodiments, in the aspect of the pressure sensor comprising an upper pressure sensor arranged in an upstream interval of the infusion pipeline relative to the driving mechanism, for detecting the upstream pressure inside the infusion pipeline and generating a corresponding upstream pressure signal; and in the aspect of outputting an alarm prompt information representing a pressure anomaly when it is determined that there is a pressure mutation during the alternating of at least one driving pump sheet according to the pressure signal, the first alarm unit is specifically further configured to: determine that there is a pressure mutation during the alternating of a plurality of driving pump sheets in succession according to the upstream pressure signal, and then output an alarm prompt information representing a pressure anomaly, wherein the pressure mutation comprises a case where the pressure drops and the drop slope is greater than or equal to 4, or a case where the pressure rises and the rise slope is greater than or equal to 4.

[0141] In some embodiments, in the aspect of the pressure sensor comprising an upper pressure sensor arranged in an upstream interval of the infusion pipeline relative to the driving mechanism, for detecting the upstream pressure inside the infusion pipeline and generating a corresponding upstream pressure signal; and in the aspect of outputting an alarm prompt information representing a pressure anomaly when it is determined that there is a pressure mutation during the alternating of at least one driving pump sheet according to the pressure signal, the first alarm unit is specifically further configured to: determine that there is a pressure mutation during the alternating of a plurality of driving pump sheets in succession according to the upstream pressure signal, and then output an alarm prompt information representing a pressure anomaly, wherein the pressure mutation comprises a case where the pressure drops and the drop slope is greater than or equal to 4, or a case where the pressure rises and the rise slope is greater than or equal to 4. Figure 11 Figure 11 is another functional unit composition block diagram of a pressure anomaly detection device provided by the embodiments of the present application. The pressure anomaly detection device 1000 is applied to an infusion pump, which is used in cooperation with an infusion pipeline. The infusion pump is used to drive the fluid in the infusion pipeline to flow towards the infusion object. The infusion pump comprises a processor, a driving mechanism, and a pressure sensor. The driving mechanism comprises a plurality of driving pump sheets arranged in sequence along the infusion direction. The driving pump sheets comprise a first driving pump sheet and a last driving pump sheet, which are arranged at the most upstream position and the most downstream position of the plurality of driving pump sheets in the infusion direction, respectively. The plurality of driving pump sheets sequentially squeeze the fluid in the infusion pipeline under the driving of the processor, so that the fluid flows towards the infusion direction. The pressure sensor comprises a lower pressure sensor arranged in a downstream interval of the infusion pipeline relative to the driving mechanism, for detecting the downstream pressure inside the infusion pipeline and generating a corresponding downstream pressure signal. The pressure anomaly detection device 1000 comprises:​

[0142] The second acquisition unit 1110 is configured to acquire the downstream pressure signal.

[0143] The second alarm unit 1120 is configured to determine, according to the downstream pressure signal, that there is a pressure mutation during continuous driving pump plate alternation, and that there is a pressure gradually rising trend during the movement of the adjacent intermediate driving pump plate after the driving pump plate alternation of each pressure mutation, and output an alarm prompt information representing the downstream blockage of the infusion pipeline.

[0144] In some embodiments, in the aspect of determining, according to the downstream pressure signal, that there is a pressure mutation during continuous driving pump plate alternation, and that there is a pressure gradually rising trend during the movement of the adjacent intermediate driving pump plate after the driving pump plate alternation of each pressure mutation, and outputting an alarm prompt information representing the downstream blockage of the infusion pipeline, the second alarm unit is specifically configured to determine, according to the downstream pressure signal, a pressure fluctuation stage; and in the pressure fluctuation stage, determine, according to the downstream pressure signal, that there is a pressure mutation during continuous driving pump plate alternation, and that there is a pressure gradually rising trend during the movement of the adjacent intermediate driving pump plate after the driving pump plate alternation of each pressure mutation, and output an alarm prompt information representing the downstream blockage of the infusion pipeline.

[0145] It can be understood that, since the method embodiments and the device embodiments are different presentation forms of the same technical concept, the content of the method embodiment part in the present application should be synchronously adapted to the device embodiment part, which will not be repeated here.

[0146] In the case of using integrated units, the function unit composition block diagram of another pressure anomaly detection device provided by the embodiments of the present application is as shown in Figure 12 In Figure 12 the pressure anomaly detection device 1000 includes a processing module 1220 and a communication module 1210. The processing module 1220 is configured to control and manage the actions of the above-mentioned pressure anomaly detection device, for example, the steps performed by the first acquisition unit 1010, the first determination unit 1020, and the first alarm unit 1030, and for example, the steps performed by the second acquisition unit 1110 and the second alarm unit 1120, and / or other processes for performing the techniques described herein. The communication module 1210 is configured to support the interaction between the pressure anomaly detection device 1000 and other devices. As Figure 12As shown, the pressure anomaly detection apparatus 1000 can further include a storage module 1230, configured to store program codes and data of the pressure anomaly detection apparatus 1000.

[0147] The processing module 1220 can be a processor or a controller, for example, a Central Processing Unit (CPU), a general-purpose processor, a Digital Signal Processor (DSP), an Application-Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. It can implement or execute the various exemplary logical blocks, modules and circuits described in combination with the disclosure of the embodiments of the present application. The processor can also be a combination of implementing computing functions, for example, a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like. The communication module 1210 can be a transceiver, an RF circuit, a communication interface, or the like. The storage module 1230 can be a memory.

[0148] The storage module 1230 can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. The non-volatile memory can be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically EPROM (EEPROM), or a flash memory. The volatile memory can be a Random Access Memory (RAM) used as an external cache. By way of example, and not limitation, many forms of random access memory can be used, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), Double Data Rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DRRAM).

[0149] All related content of each scenario involved in the above method embodiments can be cited to the function description of the corresponding function module, which will not be repeated here. The above pressure anomaly detection device can perform the above Figure 5 or Figure 9 pressure anomaly detection method shown.

[0150] The present application can divide the functional units of the electronic device according to the above method examples. For example, each functional unit can be divided according to each function, or two or more functions can be integrated in one processing unit. The integrated unit can be realized in the form of hardware or software functional unit. It should be noted that the division of units in the present application is illustrative, and is only a logical function division. In actual implementation, there can be another division method.

[0151] The present application also provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program for electronic data exchange, and the computer program causes a computer to execute part or all of the steps of any method described in the above method embodiments. The above computer includes a server.

[0152] The embodiment of the present application further provides a computer program product. The computer program product includes a non-transitory computer-readable storage medium storing a computer program. The computer program is operable to cause a computer to perform some or all of the steps of any of the pressure anomaly detection methods described in the above method embodiments. The computer program product can be a software installation package.

[0153] It should be noted that, for the above-mentioned method embodiments, in order to simply describe, they are all described as a series of action combinations, but those skilled in the art should know that the present application is not limited to the action sequence described, because according to the present application, some steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should know that the embodiments described in the specification all belong to preferred embodiments, and the actions and modules involved are not necessarily necessary for the present application.

[0154] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0155] In several embodiments provided in the present application, it should be understood that the disclosed device can be implemented by other means. For example, the device embodiments described above are only schematic, for example, the division of the above units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the shown or discussed mutual units can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical or other forms.

[0156] The units described above as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. According to actual needs, some or all of the units can be selected to achieve the purpose of the embodiment scheme.

[0157] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0158] If the above integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer readable memory. Based on this understanding, the technical solutions of the present application essentially or say the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a memory and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server or a network device, etc.) to execute all or part of the steps of the above-mentioned method of each embodiment of the present application. The aforementioned memory includes: a U disk, a read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a mobile hard disk, a magnetic disk or an optical disk, and various media that can store program codes.

[0159] A person of ordinary skill in the art can understand that all or part of the steps in the above-mentioned embodiments can be completed by a program instructing the relevant hardware, and the program can be stored in a computer readable memory, which can include a flash disk, a ROM, a RAM, a magnetic disk or an optical disk, etc.

[0160] The embodiments of the present application are described in detail above, and the principles and implementation manners of the present application are described by applying specific examples. The above embodiment description is only used to help understand the method of the present application and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present application, the specific implementation manner and application range will be changed, and the above description should not be understood as limiting the present application.

Claims

1. A method for detecting abnormal pressure, characterized in that, This invention relates to an infusion pump used in conjunction with an infusion line. The infusion pump drives the fluid within the infusion line to flow towards the infusion target. The infusion pump includes a processor, a drive mechanism, and a pressure sensor. The drive mechanism includes multiple drive pump blades arranged sequentially along the infusion direction. Each drive pump blade includes a first drive pump blade and a last drive pump blade. The first drive pump blade and the last drive pump blade are respectively located at the upstream and downstream positions of the multiple drive pump blades in the infusion direction. Driven by the processor, the multiple drive pump blades sequentially compress the fluid within the infusion line to flow towards the infusion direction. The pressure sensor is used to detect the pressure inside the infusion pipeline and generate a corresponding pressure signal; the method includes: Acquire the pressure signal; By comparing the pressure signal with a preset pressure threshold, it is determined that the pressure signal has not reached the preset pressure threshold. When it is determined that the pressure signal has not reached the preset pressure threshold, if it is determined from the pressure signal that there is a pressure change during at least one drive pump blade alternation, an alarm message indicating pressure abnormality is output. The drive pump blade alternation period refers to the switching period from when the last drive pump blade is driven to fully squeeze the infusion line to when the first drive pump blade is driven to fully squeeze the infusion line.

2. The pressure anomaly detection method according to claim 1, characterized in that, After acquiring the pressure signal, the method further includes: By comparing the pressure signal with a preset pressure threshold, it is determined that the pressure signal has reached the preset pressure threshold. When the pressure signal reaches a preset pressure threshold, an alarm message indicating an abnormal pressure is output.

3. The pressure anomaly detection method according to claim 1 or 2, characterized in that, When it is determined that the pressure signal has not reached a preset pressure threshold, if it is determined based on the pressure signal that a pressure change occurs during at least one alternation of the drive pump blades, an alarm message indicating a pressure abnormality is output, including: Based on the pressure signal, determine the pressure fluctuation stage; If it is determined that the pressure signal has not reached the preset pressure threshold and during the pressure fluctuation phase, if it is determined that there is a pressure change during the alternation of at least one drive pump blade based on the pressure signal, then an alarm message indicating pressure abnormality is output.

4. The pressure anomaly detection method according to claim 3, characterized in that, When it is determined that the pressure signal has not reached the preset pressure threshold and during the pressure fluctuation phase, if it is determined based on the pressure signal that there is a pressure change during the alternation of at least one drive pump blade, then an alarm message indicating a pressure abnormality is output, including: When it is determined that the pressure signal has not reached the preset pressure threshold and during the pressure fluctuation phase, based on the pressure signal, it is determined that there is a pressure change during at least one drive pump blade alternation, and the pressure gradually increases during the movement of the adjacent intermediate drive pump blade after the pressure change. Then, an alarm message indicating pressure abnormality is output. The movement period of the intermediate drive pump blade refers to the period from when the first drive pump blade is driven to completely squeeze the infusion line to when the last drive pump blade is driven to completely squeeze the infusion line.

5. The pressure anomaly detection method according to claim 4, characterized in that, The pressure abrupt change is a pressure drop with a drop slope greater than or equal to 4.

6. The pressure anomaly detection method according to claim 4 or 5, characterized in that, When it is determined that the pressure signal has not reached a preset pressure threshold and during the pressure fluctuation phase, based on the pressure signal, a pressure surge occurs during at least one alternating drive pump blade, and the pressure gradually increases during the movement of the adjacent intermediate drive pump blade after the pressure surge. Then, an alarm message indicating a pressure abnormality is output, including: When it is determined that the pressure signal has not reached the preset pressure threshold and during the pressure fluctuation phase, based on the pressure signal, it is determined that there is a pressure change during the alternation of multiple consecutive drive pump plates, and the pressure gradually rises during the movement of the adjacent intermediate drive pump plate after the pressure change, then an alarm message indicating pressure abnormality is output.

7. The pressure anomaly detection method according to claim 1 or 2, characterized in that, The step of determining, based on the pressure signal, that a pressure jump exists during at least one drive pump blade alternation includes: At least one feature value is determined based on the pressure signal, and the feature type corresponding to the feature value includes at least one of the following: average pressure during the alternation of the driving pump blades, standard deviation, extreme value difference, or slope; By comparing each feature value with its corresponding threshold range, the comparison result is obtained; The comparison results are used to determine whether there are pressure abrupt changes during the alternation of the drive pump blades.

8. The pressure anomaly detection method according to claim 1 or 2, characterized in that, The pressure sensor includes an upper pressure sensor disposed in the upstream section of the infusion pipeline relative to the drive mechanism, for detecting the upstream pressure inside the infusion pipeline and generating a corresponding upstream pressure signal. If, based on the pressure signal, a pressure surge is determined to occur during at least one alternation of the drive pump blades, an alarm message indicating a pressure anomaly is output, including: Based on the upstream pressure signal, if a pressure mutation is determined during the alternation of multiple drive pump blades, an alarm message indicating an abnormal pressure is output. The pressure mutation includes a pressure drop with a drop slope greater than or equal to 4, or a pressure rise with a rise slope greater than or equal to 4.

9. A method for detecting abnormal pressure, characterized in that, An infusion pump is used in conjunction with an infusion line to drive fluid within the infusion line, directing it toward the infusion target. The infusion pump includes a processor, a drive mechanism, and a pressure sensor. The drive mechanism comprises multiple drive pump blades arranged sequentially along the infusion direction. Each drive pump blade includes a first drive pump blade and a last drive pump blade, positioned at the upstream and downstream ends of the multiple drive pump blades respectively along the infusion direction. Driven by the processor, the multiple drive pump blades sequentially compress the fluid within the infusion line, directing it toward the infusion direction. The pressure sensor includes a downstream pressure sensor located in the downstream section of the infusion line relative to the drive mechanism, used to detect downstream pressure within the infusion line and generate a corresponding downstream pressure signal. The method includes: Acquire the downstream pressure signal; Based on the downstream pressure signal, if a pressure surge occurs during multiple consecutive alternations of the drive pump blades, and a gradual upward pressure trend is observed during the movement of the adjacent intermediate drive pump blade after each pressure surge, an alarm message indicating downstream blockage of the infusion line is output. The alternation period of the drive pump blades refers to the switching period from when the last drive pump blade is driven to fully compress the infusion line to when the first drive pump blade is driven to fully compress the infusion line. The movement period of the intermediate drive pump blades refers to the period from when the first drive pump blade is driven to fully compress the infusion line to when the last drive pump blade is driven to fully compress the infusion line.

10. The pressure anomaly detection method according to claim 9, characterized in that, Based on the downstream pressure signal, if it is determined that a pressure surge occurs during multiple consecutive alternations of the drive pump blades, and that there is a gradual upward pressure trend during the movement of the adjacent intermediate drive pump blade after each pressure surge, then an alarm message indicating downstream blockage of the infusion pipeline is output, including: The pressure fluctuation stage is determined based on the downstream pressure signal; During the pressure fluctuation phase, if it is determined from the downstream pressure signal that there is a pressure change during the alternation of multiple consecutive drive pump blades, and there is a gradual upward trend in pressure during the movement of the adjacent intermediate drive pump blade after each pressure change, then an alarm message indicating downstream blockage of the infusion pipeline is output.

11. An infusion pump, characterized in that, The infusion pump is used to drive the fluid in the infusion line to flow towards the infusion target. The infusion pump includes a processor, a drive mechanism, a pressure sensor, a memory, and one or more programs. The drive mechanism includes a plurality of drive pump blades arranged sequentially along the infusion direction. The drive pump blades include a first drive pump blade and a last drive pump blade. The first drive pump blade and the last drive pump blade are respectively located at the upstream and downstream positions of the plurality of drive pump blades in the infusion direction. Under the drive of the processor, the plurality of drive pump blades sequentially squeeze the fluid in the infusion line to flow towards the infusion direction. The pressure sensor is used to detect the pressure inside the infusion line and generate a corresponding pressure signal. The one or more programs are stored in the memory and configured to be executed by the processor. The programs include instructions for performing the steps of the method as described in any one of claims 1-10.

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