Verification method for respiratory support device triggering, respiratory support device and storage medium

Abstract

The application discloses a verification method for triggering of a respiratory support device, a respiratory support device and a storage medium, and relates to the technical field of respiratory support devices. The method comprises the following steps: in step S1, when flow triggering is detected, the starting point time and the ending point time of flow triggering determination are acquired, and a real-time pressure curve segment in a time period from the starting point time to the ending point time is acquired; in step S2, the minimum pressure value is determined according to the real-time pressure curve segment, and the minimum pressure value is compared with a preset exhalation pressure value; in step S3, if the minimum pressure value is less than or equal to the preset exhalation pressure value, the pressure minimum point time corresponding to the minimum pressure value of the pressure curve segment is acquired; and in step S4, whether the flow triggering before the pressure minimum point time, the starting point time and the ending point time is a false triggering is determined according to the difference between the pressure minimum point time, the starting point time and the ending point time. The application aims to perform secondary verification on the pressure waveform after flow triggering, thereby effectively avoiding the false triggering phenomenon.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a verification method for triggering a respiratory support device, as well as the respiratory support device and storage medium. Background Technology

[0002] Respiratory support devices are medical devices that can replace spontaneous ventilation. They are widely used in patients with respiratory failure, during surgery for anesthesia and respiratory management, respiratory support therapy, and emergency resuscitation, especially as the most important life support equipment in intensive care units (ICUs). However, in conventional respiratory support device ventilation modes, false triggering of respiratory support devices frequently occurs. Furthermore, some current non-invasive respiratory support devices determine triggering based on flow waveforms, but do not perform secondary verification after the determination. Therefore, when pressure disturbances cause drastic changes in the flow waveform, the respiratory support device is prone to triggering, even if it is a false trigger. Therefore, how to reasonably avoid unnecessary losses caused by false triggering of respiratory support devices has become an urgent problem to be solved. Summary of the Invention

[0003] The main objective of this invention is to provide a verification method for triggering a respiratory support device, as well as the respiratory support device and storage medium, in order to solve the technical problem of inaccurate determination of triggering status in existing respiratory support devices.

[0004] To achieve the above objectives, the present invention provides a verification method triggered by a respiratory support device, the method comprising the following steps:

[0005] Step S1: When a flow trigger is detected, obtain the start time and end time of the flow trigger determination, and obtain the real-time pressure curve segment within the time period from the start time to the end time.

[0006] Step S2: Determine the minimum pressure value based on the real-time pressure curve segment and compare the minimum pressure value with the preset expiratory pressure value.

[0007] Step S3: If the minimum pressure value is less than or equal to the preset expiratory pressure value, then obtain the time of the lowest pressure point corresponding to the minimum pressure value of the pressure curve segment.

[0008] Step S4: Determine whether the flow trigger is a false trigger based on the difference between the time of the lowest pressure point and the time of the start and end points.

[0009] Optionally, step S4 specifically includes:

[0010] Step S41: Compare the difference between the time of the lowest pressure point and the time of the start point or the time of the end point with the first preset threshold.

[0011] Step S42: If the time of the lowest pressure point and the time of the starting point are less than or equal to the first preset threshold, the flow trigger is determined to be a false trigger.

[0012] Step S43: If the time of the lowest pressure point and the time of the termination point are less than or equal to the first preset threshold, the flow trigger is determined to be a normal trigger.

[0013] Step S44: If the difference between the time of the lowest pressure point and the time of the start point and the time of the end point is greater than the first preset threshold, then determine whether the current flow trigger is a false trigger based on the slope of the curve segment between the time of the lowest pressure point and the time of the start point and the slope of the curve segment between the time of the lowest pressure point and the time of the end point.

[0014] Optionally, step S44, which involves determining whether the current flow triggering is a false trigger based on the slope of the curve segment between the time of lowest pressure and the time of start and the slope of the curve segment between the time of lowest pressure and the time of end, specifically includes:

[0015] Determine whether the slope of the curve segment between the time of the lowest pressure point and the time of the starting point is within the range of less than 0 and the second preset threshold, and compare the slope of the curve segment between the time of the lowest pressure point and the time of the ending point with 0.

[0016] If the slope of the curve segment between the lowest pressure point and the starting point is not less than 0 and within the range of the second preset threshold, and the slope of the curve segment between the lowest pressure point and the ending point is greater than or equal to 0, then the flow trigger is determined to be a normal trigger.

[0017] Optionally, after step S2, the method further includes:

[0018] S21. If the minimum pressure value is greater than the preset expiratory pressure value, the flow trigger is determined to be a false trigger.

[0019] Optionally, the first preset threshold is 50ms.

[0020] Optionally, the second preset threshold is -1.

[0021] Optionally, before step S1, the following steps are included: real-time acquisition of flow and pressure data within the respiratory support device, wherein the flow is acquired by the flow sensor of the respiratory support device, and the pressure is acquired by the pressure sensor of the respiratory support device, and the sampling frequency of the flow sensor and the pressure sensor is 1KHz.

[0022] In addition, to achieve the above objectives, the present invention also provides a respiratory support device, the respiratory support device comprising: a memory, a processor, and a respiratory support device triggered verification program stored in the memory and executable on the processor, the respiratory support device triggered verification program being configured to implement the steps of the respiratory support device triggered verification method as described in any of the preceding claims.

[0023] In addition, to achieve the above objectives, the present invention also provides a storage medium storing a verification program triggered by a respiratory support device, wherein when the verification program triggered by the respiratory support device is executed by a processor, the steps of the verification method triggered by the respiratory support device as described in any of the preceding claims are implemented.

[0024] Beneficial effects:

[0025] This invention proposes a verification method for triggering a respiratory support device. Upon detecting a flow trigger, the method acquires the start and end times of the flow trigger determination, and obtains a pressure curve segment within the time period from the start to the end time. Based on the pressure curve segment, a minimum pressure value is determined, and this minimum pressure value is compared with a preset expiratory pressure value. If the minimum pressure value is less than or equal to the preset expiratory pressure value, the time of the lowest pressure point corresponding to the minimum pressure value of the pressure curve segment is obtained. Finally, the difference between the lowest pressure point and the start and end times determines whether the flow trigger is a false trigger. This method simultaneously performs feature analysis on the pressure waveform during the flow trigger determination process, avoiding the lack of secondary verification in existing technologies that could lead to false triggers and affect human-machine synchronization. Furthermore, the respiratory support device is only truly activated into an inspiratory trigger state when both the flow waveform and pressure waveform meet the trigger characteristics, effectively preventing false triggers caused by pressure disturbances. This ensures accurate trigger determination of the respiratory support device and avoids unnecessary losses. Attached Figure Description

[0026] Figure 1 This is a flowchart illustrating an embodiment of a verification method triggered by a respiratory support device according to the present invention.

[0027] Figure 2 for Figure 1 A detailed flowchart of step S4 is shown below;

[0028] Figure 3 for Figure 1 The waveforms of flow rate and pressure at the time of flow triggering are shown below;

[0029] Figure 4 for Figure 1 The waveforms of flow and pressure during a false trigger are shown. Detailed Implementation

[0030] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0031] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0032] See Figure 1 This invention provides a flowchart illustrating an embodiment of a verification method triggered by a respiratory support device, the method comprising the following steps:

[0033] Step S1: When a flow trigger is detected, obtain the start time and end time of the flow trigger determination, and obtain the real-time pressure curve segment within the time period from the start time to the end time.

[0034] Specifically, the flow rate information during normal operation of the respiratory support device can be collected in real time by a flow sensor installed within the device, and the pressure information can be collected in real time by a pressure sensor installed within the device. Generally, the inspiratory pressure (IPAP) and expiratory pressure (EPAP) for normal operation of the respiratory support device are preset. During inspiration, the respiratory support device raises the pressure to the preset IPAP value and maintains it throughout the entire inspiratory cycle; during expiration, the respiratory support device lowers the pressure to the preset EPAP value until the next inspiration is triggered. However, pressure disturbances may cause fluctuations in flow rate, such as… Figure 3 As shown, during the depressurization process, due to overshoot, the pressure drops excessively, falling below the set EPAP value. The respiratory support device then restores the pressure to EPAP. This pressure rebound also causes an increase in flow rate, leading the respiratory support device to determine it as a trigger. In this embodiment, this is considered a flow-triggered situation. To further determine whether the flow trigger is a false trigger, further analysis of the pressure information is needed. The determination of flow triggering uses existing technology, which will not be elaborated here. In this embodiment, when a flow trigger is detected, the starting point time t1 and the ending point time t3 of the flow trigger determination are obtained, and the pressure curve segment within the time period from the starting point time t1 to the ending point time t3 is obtained accordingly, i.e., the pressure waveform data within a short period before the flow trigger point. Generally, the sampling frequency of the flow sensor and the pressure sensor is set to 1kHz.

[0035] Further, step S2 is used to determine the minimum pressure value based on the pressure curve segment and compare the minimum pressure value with the preset expiratory pressure value. The minimum pressure value refers to the pressure value corresponding to the lowest point in the pressure curve segment obtained in step S1. If the minimum pressure value is less than or equal to the preset expiratory pressure value, then step S3 is used to obtain the time t2 of the lowest pressure point corresponding to the minimum pressure value of the pressure curve segment.

[0036] And execute step S4 to determine whether the flow trigger is a false trigger based on the difference between the time of the lowest pressure point and the time of the start point and the time of the end point.

[0037] When a flow trigger is detected, the start and end times of the flow trigger determination are obtained, and the pressure curve segment within the time period from the start to the end time is acquired. A minimum pressure value is determined based on the pressure curve segment, and this minimum pressure value is compared with a preset expiratory pressure value. If the minimum pressure value is less than or equal to the preset expiratory pressure value, the time of the lowest pressure point corresponding to the minimum pressure value of the pressure curve segment is obtained. Finally, the difference between the lowest pressure point and the start and end times is used to determine whether the flow trigger is a false trigger. This allows for simultaneous feature analysis of the pressure waveform during the flow trigger determination process, avoiding the lack of secondary verification in existing technologies, preventing false triggers, affecting human-machine synchronization, and eliminating unnecessary losses.

[0038] Furthermore, such as Figure 2 As shown, step S4 specifically includes:

[0039] Step S41: Compare the difference between the time of the lowest pressure point t2 and the time of the start point t1 or the time of the end point t3 with a first preset threshold. For example, if the time of the lowest pressure point and the time of the start point are less than or equal to the first preset threshold, then step S42 is performed, the flow trigger is determined to be a false trigger, and the respiratory support device will not trigger. Specifically, the waveform of flow and pressure is shown in the figure. Figure 4 As shown, the starting point time t1 is basically the same as the time t2 when the pressure is at its lowest. By performing secondary verification on the flow trigger determination, false triggering is avoided, thus eliminating unnecessary losses.

[0040] Furthermore, if the time of the lowest pressure point and the time of the termination point are less than or equal to the first preset threshold, then step S43 is executed, the flow trigger is determined to be a normal trigger, and the respiratory support device performs the trigger action. In this embodiment, the first preset threshold is set to 50ms. It can be seen that when the flow waveform is determined to be triggered, and the pressure waveform also meets the trigger characteristics, the respiratory support device can truly enter the inspiratory trigger state, thereby effectively avoiding false triggering caused by pressure disturbances.

[0041] Step S44: If the difference between the time of the lowest pressure point and the time of the start point and the time of the end point is greater than the first preset threshold, then determine whether the current flow trigger is a false trigger based on the slope of the curve segment between the time of the lowest pressure point and the time of the start point and the slope of the curve segment between the time of the lowest pressure point and the time of the end point.

[0042] Specifically, when the difference between the time of lowest pressure and the start and end points is greater than 50ms, it is necessary to further determine whether the slope of the curve segment between the lowest pressure and the start point is within the range of a second preset threshold to 0, and to compare the slope of the curve segment between the lowest pressure and the end point with 0. The second preset threshold is -1. If the slope of the curve segment between the lowest pressure and the start point is not less than 0 to -1, and the slope of the curve segment between the lowest pressure and the end point is greater than or equal to 0, then the flow trigger is determined to be a normal trigger, and the respiratory support device executes the trigger action. Otherwise, it is considered a false trigger, and the respiratory support device does not execute the trigger action.

[0043] Furthermore, after step S2, the method further includes:

[0044] S21. If the minimum pressure value is greater than the preset expiratory pressure value, the flow trigger is determined to be a false trigger, and the respiratory support device will not perform the trigger action.

[0045] Furthermore, the present invention also provides a respiratory support device, the respiratory support device comprising: a memory, a processor, and a respiratory support device-triggered verification program stored in the memory and executable on the processor, the respiratory support device-triggered verification program being configured to implement the steps of the respiratory support device-triggered verification method as described in any of the preceding claims. Additionally, the respiratory support device is also equipped with corresponding flow sensors and pressure sensors for detecting flow and pressure information.

[0046] Furthermore, to achieve the above objectives, the present invention also provides a storage medium storing a verification program triggered by a respiratory support device. When executed by a processor, the verification program triggered by the respiratory support device implements the steps of the verification method triggered by the respiratory support device as described in any of the preceding embodiments. In this embodiment, the computer-readable storage medium may be, but is not limited to, a USB flash drive, SD card, PD optical drive, portable hard drive, high-capacity floppy drive, flash memory, multimedia memory card, server, etc.

[0047] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0048] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0049] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A verification method triggered by a respiratory support device, characterized in that, The method includes the following steps: Step S1: When a flow trigger is detected, obtain the start time and end time of the flow trigger determination, and obtain the pressure curve segment within the time period from the start time to the end time. Step S2: Determine the minimum pressure value based on the pressure curve segment and compare the minimum pressure value with the preset expiratory pressure value. Step S3: If the minimum pressure value is less than or equal to the preset expiratory pressure value, then obtain the time of the lowest pressure point corresponding to the minimum pressure value of the pressure curve segment. Step S4: Determine whether the flow trigger is a false trigger based on the difference between the time of the lowest pressure point and the time of the start and end points. Specifically, step S4 includes: Step S41: Compare the difference between the time of the lowest pressure point and the time of the start point or the time of the end point with the first preset threshold. Step S42: If the time of the lowest pressure point and the time of the starting point are less than or equal to the first preset threshold, the flow trigger is determined to be a false trigger. Step S43: If the time of the lowest pressure point and the time of the termination point are less than or equal to the first preset threshold, the flow trigger is determined to be a normal trigger. Step S44: If the difference between the time of the lowest pressure point and the time of the start point and the time of the end point is greater than the first preset threshold, then determine whether the current flow trigger is a false trigger based on the slope of the curve segment between the time of the lowest pressure point and the time of the start point and the slope of the curve segment between the time of the lowest pressure point and the time of the end point.

2. The verification method triggered by the respiratory support device according to claim 1, characterized in that, Step S44, which involves determining whether the current flow triggering is a false triggering based on the slope of the curve segment between the time of lowest pressure and the time of start and the slope of the curve segment between the time of lowest pressure and the time of end, specifically includes: Determine whether the slope of the curve segment between the time of the lowest pressure point and the time of the starting point is within the range of the second preset threshold to 0, and compare the slope of the curve segment between the time of the lowest pressure point and the time of the ending point with 0. If the slope of the curve segment between the lowest pressure point and the starting point is not within the range of the second preset threshold to 0, and the slope of the curve segment between the lowest pressure point and the ending point is greater than or equal to 0, then the flow trigger is determined to be a normal trigger.

3. The verification method triggered by the respiratory support device according to claim 1, characterized in that, After step S2, the method further includes: S21. If the minimum pressure value is greater than the preset expiratory pressure value, the flow trigger is determined to be a false trigger.

4. The verification method triggered by the respiratory support device according to claim 1, characterized in that, The first preset threshold is 50ms.

5. The verification method triggered by the respiratory support device according to claim 2, characterized in that, The second preset threshold is -1.

6. The verification method triggered by the respiratory support device according to any one of claims 1 to 5, characterized in that, Before step S1, the following steps are included: real-time acquisition of flow and pressure data within the respiratory support device. The flow is acquired by a flow sensor installed within the respiratory support device, and the pressure is acquired by a pressure sensor installed within the respiratory support device. The sampling frequency of the flow sensor and the pressure sensor is 1 kHz.

7. A respiratory support device, characterized in that, The respiratory support device includes: a memory, a processor, and a respiratory support device-triggered verification program stored in the memory and executable on the processor, the respiratory support device-triggered verification program being configured to implement the steps of the respiratory support device-triggered verification method as described in any one of claims 1 to 6.

8. A storage medium, characterized in that, The storage medium stores a verification program triggered by a respiratory support device, which, when executed by a processor, implements the steps of the verification method triggered by a respiratory support device as described in any one of claims 1 to 6.

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