Flow rate-based ventilator trigger control method, system, device and storage medium

Abstract

This invention discloses a flow rate-based ventilator trigger control method, system, device, and storage medium, relating to the field of ventilator technology. The method includes: responding to a user's operation command to enter the expiratory phase of the target ventilator; detecting whether the airway pressure is stable; when the pressure is not stable, identifying flow rate spikes generated by the patient's spontaneous inspiration; and when spontaneous inspiration is identified, controlling the target ventilator to provide triggered ventilation based on a pressure stability indicator and a flow rate trigger threshold. This method enables the target ventilator to accurately identify spontaneous triggering and pressure overshoot triggering, effectively eliminating false triggering and ensuring timely triggered ventilation when spontaneous inspiration occurs.

Description

Technical Field

[0001] This invention relates to the field of ventilator technology, and more specifically to a flow rate-based ventilator trigger control method, system, computer device, and non-volatile computer-readable storage medium. Background Technology

[0002] Currently, in the clinical ventilation treatment of ventilators, in order to minimize the patient's work of breathing and meet the patient's tidal volume requirements, ventilators usually have the function of recognizing the patient's inspiratory effort. When the patient makes an inspiratory effort, the ventilator will be triggered to provide corresponding assisted ventilation. A high-performance ventilator should have a sensitive and accurate trigger judgment. If the trigger sensitivity is poor, it is difficult to provide timely ventilation when the patient needs it, which will affect the ventilation effect. If the trigger accuracy is low, false triggering is likely to occur, causing patient-ventilator asynchrony.

[0003] Currently, during actual mechanical ventilation, pressure overshoot is inevitable during the transition from inspiration to expiration. In this case, the airway pressure initially drops below PEEP and then returns to PEEP. When the ventilator is set to flow-triggered, and the patient's lung compliance and inspiratory resistance are low, there will be a positive spike after the expiratory flow rate returns to zero, easily triggering a false trigger that meets the flow threshold. False triggering can cause severe patient-ventilator asynchrony, increasing the risk of ventilator-associated lung injury. Therefore, to address these false triggers, existing technologies primarily employ the following methods: determining whether the false trigger is caused by pressure overshoot by assessing airway pressure stability. If the trigger condition is met before the pressure stabilizes, it is considered pressure overshoot and ventilation is not initiated.

[0004] However, in the existing technology, ventilators cannot effectively distinguish between pressure overshoot triggering and patient spontaneous triggering based solely on pressure stability conditions. For example, when a patient spontaneously inhales before the airway pressure has stabilized, it is easy to misjudge that it is caused by pressure overshoot. In this case, the ventilator cannot generate an effective trigger and cannot deliver air to the patient in time.

[0005] Therefore, how to provide a flow rate-based ventilator trigger control method, system, computer device, and non-volatile computer-readable storage medium that enables the target ventilator to accurately identify spontaneous triggering and pressure overshoot triggering, can not only effectively eliminate false triggering, but also ensure that the patient is given timely triggered ventilation when spontaneous inspiration occurs is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the purpose of this invention is to provide a flow rate-based ventilator trigger control method, system, computer device and non-volatile computer-readable storage medium, which enables the target ventilator to accurately identify spontaneous triggering and pressure overshoot triggering, effectively eliminating false triggering and ensuring timely triggered ventilation when the patient has spontaneous inspiration.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A flow rate-based ventilator trigger control method, comprising:

[0009] In response to the user's operating instructions, it enters the expiratory phase of the target ventilator;

[0010] Check if the airway pressure is stable;

[0011] When the pressure is not stable, the flow rate spikes generated by the patient's spontaneous inhalation are identified.

[0012] When spontaneous inhalation is detected, the target ventilator is controlled to provide triggered ventilation based on the pressure stabilization indicator and flow rate trigger threshold.

[0013] In a further technical solution, the flow rate-based ventilator triggering control method, wherein when spontaneous inspiration is detected, the target ventilator is controlled to provide triggered ventilation based on a pressure stability indicator and a flow rate trigger threshold, includes:

[0014] When spontaneous inhalation is detected, if the pressure stability indicator is stable and the patient's flow rate is greater than the flow rate trigger threshold, the target ventilator is controlled to provide triggered ventilation.

[0015] In a further technical solution, the flow rate-based ventilator trigger control method, wherein when spontaneous inspiration is detected, if the pressure stability flag is stable and the patient's flow rate is greater than the flow rate trigger threshold, the target ventilator is controlled to provide triggered ventilation. The process for determining if the pressure stability flag is stable is as follows:

[0016] The system acquires real-time patient pressure acceleration PatPressAcc and continuously stores it into a buffer array of fixed length M. When the buffer array is full, the system sums the M data points in the buffer array to obtain PatPressAccSum, and sums the latest K data points in the buffer array to obtain PatPressAccSumFast. PatPressAccSum and PatPressAccSumFast are then compared with a first threshold range and a first target threshold, which are pre-defined. If PatPressAccSum is within the first threshold range and PatPressAccSumFast is less than the first target threshold, the pressure is determined to be in a stable state, and the pressure stability flag is set to stable.

[0017] In a further technical solution, the flow rate-based ventilator trigger control method, wherein when spontaneous inspiration is detected, if the pressure stability flag is stable and the patient's flow rate is greater than the flow rate trigger threshold, the target ventilator is controlled to provide triggered ventilation. The process for determining if the pressure stability flag is stable is as follows:

[0018] The real-time patient flow rate PatFlow is acquired and continuously stored in a buffer array of fixed length N. When the buffer array is full, the maximum value FlowMax, the minimum value FlowMin, the mean of the first X data points FlowHeadMean, and the mean of the last Y data points FlowTailMean are calculated. FlowMin-FlowMax and FlowTailMean-FlowHeadMean are compared with the pre-defined second and third threshold intervals. If FlowMin-FlowMax is within the second threshold interval and FlowTailMean-FlowHeadMean is within the third threshold interval, the flow rate is considered to be in a stable state, and the flow rate spike caused by pressure overshoot has been skipped. At this time, the pressure stability flag is set to stable.

[0019] In a further technical solution, the ventilator trigger control method based on flow rate is described, wherein M is 20 and K is 5.

[0020] In a further technical solution, the ventilator trigger control method based on flow rate is described, wherein N is 20, X is 5, and Y is 5.

[0021] In a further technical solution, the flow rate-based ventilator trigger control method, wherein when the pressure is not stable, identifies the flow rate spikes generated by the patient's spontaneous inhalation, wherein the identification process is as follows:

[0022] The system acquires real-time patient pressure acceleration PatPressAcc, patient flow acceleration PatFlowAcc, and patient flow velocity PatFlow. When PatFlow is greater than 0, recognition is initiated. If PatFlowAcc is greater than 0 and PatPressAcc is less than 0, the self-identification confirmation count SelfInspCnt is incremented by 1. SelfInspCnt is compared with the pre-set second target threshold SelfInspConfirmNum. If SelfInspCnt is greater than or equal to SelfInspConfirmNum, a flow velocity surge generated by the patient's spontaneous inspiration is identified.

[0023] A flow rate-based ventilator trigger control system, comprising:

[0024] The entry module is used to respond to user commands and enter the expiratory phase of the target ventilator;

[0025] The detection module is used to detect whether the airway pressure is stable;

[0026] The identification module is used to identify the flow rate spikes generated by the patient's spontaneous inhalation when the pressure is not stable.

[0027] The control module is used to control the target ventilator to provide triggered ventilation when spontaneous inspiration is detected, based on the pressure stability indicator and the flow rate trigger threshold.

[0028] A computer device, wherein the computer device includes at least one processor; and,

[0029] A memory communicatively connected to the at least one processor; wherein,

[0030] The memory stores a computer program that can be executed by the at least one processor. When the computer program is executed by the at least one processor, it can implement the flow rate-based ventilator trigger control method as described above.

[0031] A non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium stores a computer program that, when executed by at least one processor, can implement the flow rate-based ventilator trigger control method as described in any of the preceding claims.

[0032] Compared to existing technologies, this invention provides a flow rate-based ventilator triggering control method, system, computer device, and non-volatile computer-readable storage medium. The method includes: responding to a user's operation command to enter the expiratory phase of the target ventilator; detecting whether the airway pressure is stable; when the pressure is not stable, identifying flow rate spikes generated by the patient's spontaneous inspiration; and when spontaneous inspiration is identified, controlling the target ventilator to provide triggered ventilation based on a pressure stability indicator and a flow rate trigger threshold. Thus, the method of this invention enables the target ventilator to accurately identify spontaneous triggering and pressure overshoot triggering, effectively eliminating false triggering and ensuring timely triggered ventilation when spontaneous inspiration occurs. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a flowchart illustrating a flow rate-based ventilator trigger control method provided in an embodiment of the present invention.

[0035] Figure 2 This is a schematic diagram illustrating the flow velocity surge caused by pressure overshoot, provided in an embodiment of the present invention.

[0036] Figure 3 This is a schematic diagram illustrating the flow velocity surge caused by autonomous inhalation, provided in an embodiment of the present invention.

[0037] Figure 4 This is a schematic diagram of the functional modules of a flow rate-based ventilator trigger control system provided in an embodiment of the present invention.

[0038] Figure 5 This is a schematic diagram of the hardware structure of a computer device provided in an embodiment of the present invention. Detailed Implementation

[0039] To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0040] In the description of this invention, the terms "comprising," "including," "having," and "containing" are all open-ended terms, meaning that they include but are not limited to. The terms "one embodiment," "one specific embodiment," "some embodiments," and "for example," etc., refer to specific features, structures, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. The order of steps involved in the various embodiments is used to illustrate the implementation of this application, and the order of steps is not limited and can be adjusted appropriately as needed.

[0041] Various non-limiting embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0042] Please see Figure 1 This invention provides a flow rate-based ventilator triggering control method, wherein the method includes the following steps:

[0043] S100, in response to the user's operation command, enters the expiratory phase of the target ventilator;

[0044] S200: Check if the airway pressure is stable;

[0045] S300: When the pressure is not stable, the flow rate spikes generated by the patient's spontaneous inhalation are identified.

[0046] S400: When spontaneous inhalation is detected, the target ventilator is controlled to provide triggered ventilation based on the pressure stability indicator and flow rate trigger threshold.

[0047] As is known to those skilled in the art, Figure 2 , Figure 3 As shown, the flow rate spike caused by pressure overshoot and the flow rate spike caused by the patient's spontaneous inspiration have the following characteristics: the former increases the flow rate while the airway pressure also increases synchronously, while the latter increases the flow rate while the airway pressure decreases synchronously. Therefore, based on this characteristic difference, we can distinguish between false triggering and spontaneous triggering caused by pressure overshoot.

[0048] In this specific implementation, firstly, in response to the user's operation command, the system enters the expiratory phase of the target ventilator. Then, during the expiratory phase, the system detects whether the airway pressure is stable. If the pressure is not stable, the system identifies the flow rate spikes generated by the patient's spontaneous inhalation based on the aforementioned characteristic differences. When the system identifies the patient's spontaneous inhalation, the system controls the target ventilator to provide triggered ventilation based on the pressure stability indicator and the flow rate trigger threshold.

[0049] Furthermore, in the aforementioned flow rate-based ventilator trigger control method, when the pressure is not stable, the flow rate spikes generated by the patient's spontaneous inhalation are identified, wherein the identification process is as follows:

[0050] The system acquires real-time patient pressure acceleration PatPressAcc, patient flow acceleration PatFlowAcc, and patient flow velocity PatFlow. When PatFlow is greater than 0, recognition is initiated. If PatFlowAcc is greater than 0 and PatPressAcc is less than 0, the self-identification confirmation count SelfInspCnt is incremented by 1. SelfInspCnt is compared with the pre-set second target threshold SelfInspConfirmNum. If SelfInspCnt is greater than or equal to SelfInspConfirmNum, a flow velocity surge generated by the patient's spontaneous inspiration is identified.

[0051] In this specific implementation, the identification process is as follows: during the expiratory phase, real-time patient pressure acceleration PatPressAcc, patient flow acceleration PatFlowAcc, and patient flow rate PatFlow are acquired. When PatFlow is greater than 0, identification is initiated. If PatFlowAcc is greater than 0 and PatPressAcc is less than 0, the self-identification confirmation count SelfInspCnt is incremented by 1; otherwise, SelfInspCnt is set to 0. Then, SelfInspCnt is compared with the pre-set second target threshold SelfInspConfirmNum. If SelfInspCnt is greater than or equal to SelfInspConfirmNum, it is determined that a flow rate bulge generated by the patient's spontaneous inhalation has been identified.

[0052] Furthermore, the flow rate-based ventilator triggering control method, wherein when spontaneous inspiration is detected, controlling the target ventilator to provide triggered ventilation based on a pressure stabilization flag and a flow rate trigger threshold includes:

[0053] When spontaneous inhalation is detected, if the pressure stability indicator is stable and the patient's flow rate is greater than the flow rate trigger threshold, the target ventilator is controlled to provide triggered ventilation.

[0054] In specific implementation, in this embodiment, when a patient's spontaneous inhalation is detected, if the pressure stability indicator is stable and the patient's flow rate is greater than the flow rate trigger threshold, the target ventilator is controlled to provide triggered ventilation; otherwise, the target ventilator is controlled not to provide triggered ventilation.

[0055] Furthermore, in the flow rate-based ventilator trigger control method, when spontaneous inspiration is detected, if the pressure stability flag is stable and the patient's flow rate is greater than the flow rate trigger threshold, then the target ventilator is controlled to provide triggered ventilation. The process for determining if the pressure stability flag is stable is as follows:

[0056] The system acquires real-time patient pressure acceleration (PatPressAcc) and continuously stores it in a buffer array of fixed length M. When the buffer array is full, the system sums the M data points in the buffer array to obtain PatPressAccSum, and sums the latest K data points in the buffer array to obtain PatPressAccSumFast. PatPressAccSum and PatPressAccSumFast are then compared with a pre-defined first threshold interval and a first target threshold. If PatPressAccSum is within the first threshold interval and PatPressAccSumFast is less than the first target threshold, the pressure is considered to be in a stable state, and the pressure stability flag is set to stable. Here, M and K are both positive integers, and K is less than M.

[0057] Furthermore, in the flow rate-based ventilator trigger control method, M is 20 and K is 5.

[0058] In specific implementation, in this embodiment, the process for determining that the pressure is stable is as follows: real-time patient pressure acceleration PatPressAcc is acquired and continuously stored in a buffer array of fixed length 20. When the buffer array is full, the 20 data in the buffer array are summed to obtain PatPressAccSum, and the latest 5 data in the buffer array are summed to obtain PatPressAccSumFast. Then, PatPressAccSum and PatPressAccSumFast are compared with the first threshold interval and the first target threshold that are pre-set for both. If PatPressAccSum is within the first threshold interval and PatPressAccSumFast is less than the first target threshold, then the pressure is determined to be in a stable state, and the pressure stability flag is set to stable.

[0059] Furthermore, in the flow rate-based ventilator trigger control method, when spontaneous inspiration is detected, if the pressure stability flag is stable and the patient's flow rate is greater than the flow rate trigger threshold, then the target ventilator is controlled to provide triggered ventilation. The process for determining if the pressure stability flag is stable is as follows:

[0060] The system acquires real-time patient flow rate PatFlow and continuously stores it in a buffer array of fixed length N. When the buffer array is full, it calculates the maximum value FlowMax, the minimum value FlowMin, the mean of the first X data points FlowHeadMean, and the mean of the last Y data points FlowTailMean. It then compares FlowMin-FlowMax and FlowTailMean-FlowHeadMean with their corresponding pre-defined second and third threshold intervals. If FlowMin-FlowMax is within the second threshold interval and FlowTailMean-FlowHeadMean is within the third threshold interval, the flow rate is considered to be in a stable state, and the flow rate spike caused by pressure overshoot has been skipped. At this point, the pressure stability flag is set to stable. Here, N, X, and Y are all positive integers, and X and Y are both less than N.

[0061] Furthermore, in the flow rate-based ventilator trigger control method, N is 20, X is 5, and Y is 5.

[0062] In specific implementation, in this embodiment, the process for determining the pressure stability flag is as follows: The real-time patient flow rate PatFlow is acquired and continuously stored in a buffer array of fixed length 20. When the buffer array is full, the maximum value FlowMax, the minimum value FlowMin, the average of the first five data points FlowHeadMean, and the average of the last five data points FlowTailMean are calculated. Then, FlowMin-FlowMax and FlowTailMean-FlowHeadMean are compared with their corresponding pre-defined second and third threshold intervals. If FlowMin-FlowMax is within the second threshold interval and FlowTailMean-FlowHeadMean is within the third threshold interval, the flow rate is determined to be in a stable state, and the flow rate spike caused by pressure overshoot has been skipped. At this point, the pressure stability flag is set to stable. In other words, this embodiment releases the flow rate to a stable state based on the flow rate stability condition.

[0063] As can be seen from the above method embodiments, the flow rate-based ventilator triggering control method provided by the present invention includes: responding to the user's operation command to enter the expiratory phase of the target ventilator; detecting whether the airway pressure is stable; when the pressure is not stable, identifying the flow rate spike generated by the patient's spontaneous inspiration; when spontaneous inspiration is identified, controlling the target ventilator to provide triggered ventilation according to the pressure stability indicator and the flow rate triggering threshold. Thus, the method of this embodiment enables the target ventilator to accurately identify spontaneous triggering and pressure overshoot triggering, effectively eliminating false triggering and ensuring timely triggered ventilation when spontaneous inspiration occurs.

[0064] It should be understood that although this application provides the method operation steps as described in the embodiments or flowcharts, conventional or non-inventive labor may include more or fewer operation steps, and these operation steps are not necessarily executed sequentially according to the order of the embodiments or flowcharts. The order of steps listed in the embodiments or flowcharts is merely one way of executing many steps and does not represent the only execution order. It should be noted that there is no necessary sequential order between the above steps. Those skilled in the art can understand from the description of the embodiments of the present invention that the above steps may have different execution orders in different embodiments, that is, they may be executed in parallel or in exchange, etc. Moreover, at least some steps in the embodiments or flowcharts may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but may be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but may be executed in turn, alternately, or synchronously with other steps or at least a part of the sub-steps or stages of other steps.

[0065] Based on the above embodiments, please refer to Figure 4 Another embodiment of the present invention also provides a flow rate-based ventilator triggering control system, wherein the system includes:

[0066] Enter module 11, which is used to enter the expiratory phase of the target ventilator in response to the user's operation command;

[0067] Detection module 12 is used to detect whether the airway pressure is stable;

[0068] The identification module 13 is used to identify the flow rate bulge generated by the patient's spontaneous inhalation when the pressure is not stable.

[0069] The control module 14 is used to control the target ventilator to provide triggered ventilation when spontaneous inhalation is detected, based on the pressure stability indicator and the flow rate trigger threshold.

[0070] For specific implementation methods, please refer to the above method embodiments, which will not be repeated here.

[0071] As can be seen from the above system embodiments, the flow rate-based ventilator triggering control system provided by the present invention includes: an entry module, used to enter the expiratory phase of the target ventilator in response to a user's operation command; a detection module, used to detect whether the airway pressure is stable; an identification module, used to identify the flow rate spike generated by the patient's spontaneous inspiration when the pressure is not stable; and a control module, used to control the target ventilator to provide triggered ventilation based on a pressure stability indicator and a flow rate trigger threshold when spontaneous inspiration is detected. Thus, the system of this embodiment enables the target ventilator to accurately identify spontaneous triggering and pressure overshoot triggering, effectively eliminating false triggering and ensuring timely triggered ventilation when spontaneous inspiration occurs.

[0072] Based on the above embodiments, please refer to Figure 5 Another embodiment of the present invention also provides a computer device, wherein the computer device 10 includes:

[0073] Memory 120 and one or more processors 110, Figure 5 The following description uses a processor 110 as an example. The processor 110 and the memory 120 can be connected via a communication bus or other means. Figure 5 Taking the example of China and Israel being connected via a communication bus.

[0074] Processor 110 performs various control logic functions of computer device 10. It can be a general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA), microcontroller, ARM (Acorn RISC Machine) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination of these components. Furthermore, processor 110 can also be any conventional processor, microprocessor, or state machine. Processor 110 can also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors combined with a DSP core, or any other such configuration.

[0075] The memory 120, as a non-volatile computer-readable storage medium, can be used to store non-volatile software programs, non-volatile computer-executable programs, and modules, such as the computer program corresponding to the flow rate-based ventilator trigger control method in the embodiments of the present invention. The processor 110 executes various functional applications and data processing of the computer device 10 by running the non-volatile software programs, instructions, and units stored in the memory 120, thereby implementing the flow rate-based ventilator trigger control method in the above method embodiments.

[0076] The memory 120 may include a program storage area and a data storage area, wherein the program storage area may store application programs required for operating the device and at least one function; the data storage area may store data created according to the use of the computer device 10, etc. Furthermore, the memory 120 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory 120 may optionally include memory remotely located relative to the processor 110, and these remote memories may be connected to the computer device 10 via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0077] One or more units are stored in memory 120, and when executed by one or more processors 110, can implement the flow rate-based ventilator triggering control method as described in any of the above method embodiments, for example, the method described above. Figure 1 Method steps S100 to S400.

[0078] Those skilled in the art will understand that Figure 5 The hardware structure diagram shown is only a schematic diagram of a part of the structure related to the present invention and does not constitute a limitation on the computer device on which the present invention is applied. The specific computer device may include more components than shown in the figure, or combine some components, or have different component arrangements.

[0079] Based on the above embodiments, the present invention also provides a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium stores a computer program, and when the computer program is executed by at least one processor, it can implement the flow rate-based ventilator trigger control method as described in any of the above method embodiments, for example, it can implement the above-described... Figure 1 Method steps S100 to S400.

[0080] As an example, non-volatile storage media can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) as an external cache memory. By way of illustration and not limitation, RAM can be obtained in many forms such as synchronous RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), Synch-link DRAM (SLDRAM), and direct Rambus RAM (DRRAM). The memory components or memories disclosed in the operating environment described herein are intended to include one or more of these and / or any other suitable types of memory.

[0081] Another embodiment of the present invention provides a computer program product comprising a computer program stored on a non-volatile computer-readable storage medium, the computer program including program instructions that, when executed by a processor, can implement the flow rate-based ventilator trigger control method as described in any of the above method embodiments, for example, can implement the above-described... Figure 1 Method steps S100 to S400.

[0082] The embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0083] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a general-purpose hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the parts that contribute to the related technology, can be embodied in the form of a software product. This computer software product can exist in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods of various embodiments or some parts of embodiments.

[0084] Among other things, conditional language such as “can,” “may,” “may,” or “may,” unless otherwise specifically stated or otherwise understood as in the context in which they are used, is generally intended to convey that a particular implementation may include (but not others) certain features, elements, and / or operations. Therefore, such conditional language is also generally intended to imply that features, elements, and / or operations are necessary for one or more implementations in any way, or that one or more implementations must include logic for determining, with or without input or prompting, whether such features, elements, and / or operations are included or will be performed in any particular implementation.

[0085] The contents already described herein, in this specification, and in the accompanying drawings include examples of a flow-based ventilator trigger control method, system, computer device, and non-volatile computer-readable storage medium. It is certainly not possible to describe every conceivable combination of elements and / or methods for the purpose of describing the various features of this disclosure, but it will be appreciated that many other combinations and substitutions of the disclosed features are possible. Therefore, it will be apparent that various modifications can be made to this disclosure without departing from the scope or spirit of this disclosure, but all such various modifications should fall within the protection scope of the appended claims. Furthermore, or in alternatives, other embodiments of this disclosure may become apparent from consideration of this specification and the accompanying drawings, and from practice of this disclosure as presented herein. It is intended that the examples set forth in this specification and the accompanying drawings be considered in all respects as illustrative and not restrictive. Although specific terminology is used herein, it is used in a general and descriptive sense and is not intended for limiting purposes.

Claims

1. A flow rate-based ventilator trigger control method, characterized in that, include: In response to the user's operating instructions, it enters the expiratory phase of the target ventilator; Check if the airway pressure is stable; When the pressure is not stable, the flow rate spikes generated by the patient's spontaneous inhalation are identified. When spontaneous inhalation is detected, the target ventilator is controlled to provide triggered ventilation based on the pressure stability indicator and flow rate trigger threshold. When the pressure is not stable, the flow rate spikes generated by the patient's spontaneous inspiration are identified. The identification process is as follows: The system acquires real-time patient pressure acceleration PatPressAcc, patient flow acceleration PatFlowAcc, and patient flow velocity PatFlow. When PatFlow is greater than 0, recognition is initiated. If PatFlowAcc is greater than 0 and PatPressAcc is less than 0, the self-identification confirmation count SelfInspCnt is incremented by 1. SelfInspCnt is compared with the pre-set second target threshold SelfInspConfirmNum. If SelfInspCnt is greater than or equal to SelfInspConfirmNum, a flow velocity surge generated by the patient's spontaneous inspiration is identified.

2. The ventilator triggering control method based on flow rate according to claim 1, characterized in that, When spontaneous inhalation is detected, the target ventilator is controlled to provide triggered ventilation based on the pressure stability indicator and the flow rate trigger threshold, including: When spontaneous inhalation is detected, if the pressure stability indicator is stable and the patient's flow rate is greater than the flow rate trigger threshold, the target ventilator is controlled to provide triggered ventilation.

3. The flow rate-based ventilator triggering control method according to claim 2, characterized in that, When spontaneous inhalation is detected, if the pressure stability indicator is stable and the patient's flow rate is greater than the flow rate trigger threshold, the target ventilator is controlled to provide triggered ventilation. The process for determining if the pressure stability indicator is stable is as follows: The system acquires real-time patient pressure acceleration PatPressAcc and continuously stores it into a buffer array of fixed length M. When the buffer array is full, the system sums the M data points in the buffer array to obtain PatPressAccSum, and sums the latest K data points in the buffer array to obtain PatPressAccSumFast. PatPressAccSum and PatPressAccSumFast are then compared with a first threshold range and a first target threshold, which are pre-defined. If PatPressAccSum is within the first threshold range and PatPressAccSumFast is less than the first target threshold, the pressure is determined to be in a stable state, and the pressure stability flag is set to stable.

4. The flow rate-based ventilator triggering control method according to claim 2, characterized in that, When spontaneous inhalation is detected, if the pressure stability indicator is stable and the patient's flow rate is greater than the flow rate trigger threshold, the target ventilator is controlled to provide triggered ventilation. The process for determining if the pressure stability indicator is stable is as follows: The real-time patient flow rate PatFlow is acquired and continuously stored in a buffer array of fixed length N. When the buffer array is full, the maximum value FlowMax, the minimum value FlowMin, the mean of the first X data points FlowHeadMean, and the mean of the last Y data points FlowTailMean are calculated. FlowMin-FlowMax and FlowTailMean-FlowHeadMean are compared with the pre-defined second and third threshold intervals. If FlowMin-FlowMax is within the second threshold interval and FlowTailMean-FlowHeadMean is within the third threshold interval, the flow rate is considered to be in a stable state, and the flow rate spike caused by pressure overshoot has been skipped. At this time, the pressure stability flag is set to stable.

5. The flow rate-based ventilator triggering control method according to claim 3, characterized in that, M is 20, K is 5.

6. The flow rate-based ventilator triggering control method according to claim 4, characterized in that, N is 20, X is 5, and Y is 5.

7. A flow rate-based ventilator triggering control system, characterized in that, include: The entry module is used to respond to user operation commands and enter the expiratory phase of the target ventilator; The detection module is used to detect whether the airway pressure is stable; The identification module is used to identify the flow rate spikes generated by the patient's spontaneous inspiration when the pressure is not stable. The control module is used to control the target ventilator to provide triggered ventilation when spontaneous inspiration is detected, based on the pressure stability indicator and the flow rate trigger threshold. When the pressure is not stable, the flow rate spikes generated by the patient's spontaneous inspiration are identified. The identification process is as follows: The system acquires real-time patient pressure acceleration PatPressAcc, patient flow acceleration PatFlowAcc, and patient flow velocity PatFlow. When PatFlow is greater than 0, recognition is initiated. If PatFlowAcc is greater than 0 and PatPressAcc is less than 0, the self-identification confirmation count SelfInspCnt is incremented by 1. SelfInspCnt is compared with the pre-set second target threshold SelfInspConfirmNum. If SelfInspCnt is greater than or equal to SelfInspConfirmNum, a flow velocity surge generated by the patient's spontaneous inspiration is identified.

8. A computer device, characterized in that, The computer device includes at least one processor; and, A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor. When the computer program is executed by the at least one processor, it can implement the flow rate-based ventilator trigger control method as described in any one of claims 1-6.

9. A non-volatile computer-readable storage medium, characterized in that, The non-volatile computer-readable storage medium stores a computer program that, when executed by at least one processor, can implement the flow rate-based ventilator trigger control method as described in any one of claims 1-6.

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