A gas concentration measurement method and device, a medical ventilation device, and a storage medium

Abstract

The application discloses a gas concentration measuring method applied to a medical ventilation device. In the process of ventilation, the medical ventilation device is inhibited from gas delivery in a preset time period according to a preset control mode (S201); and a target gas concentration is measured in the preset time period (S202). The target gas concentration is the concentration of any one gas component in patient exhaled gas.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of medical devices, and in particular to a gas measurement method and device, a medical ventilation device, and a storage medium. BACKGROUND

[0002] In the process of mechanical ventilation of a patient by a medical ventilation device such as a ventilator or an anesthesia machine, the end-tidal carbon dioxide concentration of the patient needs to be measured to help doctors analyze the ventilation condition of the patient and determine whether the patient has hypercapnia or hypocapnia.

[0003] However, there is currently no method that can accurately measure the end-tidal carbon dioxide concentration. SUMMARY

[0004] To solve the above technical problem, embodiments of the present application aim to provide a gas concentration measurement method and device, a medical ventilation device, and a storage medium, which can accurately measure the target gas concentration in the exhaled gas of a patient by inhibiting gas delivery for a period of time to reduce or eliminate the dilution of fresh gas to the exhaled gas of the patient when ventilating the patient.

[0005] The technical solution of the embodiments of the present application can be implemented as follows:

[0006] The embodiments of the present application provide a gas concentration measurement method applied to a medical ventilation device, and the method comprises:

[0007] Inhibiting the medical ventilation device from delivering gas in a preset time period according to a preset control mode during ventilation;

[0008] Measuring the target gas concentration in the preset time period; wherein the target gas concentration is the concentration of any gas component in the exhaled gas of the patient.

[0009] In the above solution, the preset control mode is to reduce the gas flow or stop gas delivery.

[0010] In the above solution, the step of inhibiting the medical ventilation device from delivering gas in the preset time period according to the preset control mode comprises:

[0011] Obtaining a preset inhibition period;

[0012] According to the preset inhibition period, periodically inhibiting the medical ventilation device from delivering gas in the preset time period according to the preset control mode.

[0013] In the above solution, the step of inhibiting the medical ventilation device from delivering gas in the preset time period according to the preset control mode comprises:

[0014] receive a triggering instruction, and according to the triggering instruction, inhibit the medical ventilator from delivering gas in a preset time period according to a preset control mode.

[0015] In the above scheme, before the step of inhibiting the medical ventilator from delivering gas in a preset time period according to a preset control mode is performed, the method further comprises:

[0016] acquiring a physiological parameter of the patient;

[0017] If the physiological parameter of the patient indicates that the patient is in a stable state, the step of inhibiting the medical ventilator from delivering gas in a preset time period according to a preset control mode is performed.

[0018] In the above scheme, when the step of inhibiting the medical ventilator from delivering gas in a preset time period according to a preset control mode is performed, the method further comprises:

[0019] acquiring a physiological parameter of the patient;

[0020] If the physiological parameter of the patient indicates that the patient is in an abnormal state, the step of inhibiting the medical ventilator from delivering gas in a preset time period according to a preset control mode is stopped, and the medical ventilator is controlled to ventilate according to a preset ventilation mode and / or output an abnormality prompt of the patient.

[0021] In the above scheme, the step of measuring the target gas concentration in the preset time period comprises:

[0022] The target gas concentration is measured at a time interval of a preset time interval from the start time of the preset time period.

[0023] In the above scheme, the step of measuring the target gas concentration in the preset time period comprises:

[0024] If the change rule of the target gas concentration measured in the preset time period is obtained, the step of inhibiting the medical ventilator from delivering gas in a preset time period according to a preset control mode is stopped, and the medical ventilator is controlled to ventilate according to a preset ventilation mode.

[0025] In the above scheme, when the step of inhibiting the medical ventilator from delivering gas in a preset time period according to a preset control mode is performed, the method further comprises:

[0026] If a stop instruction is received, the step of inhibiting the medical ventilator from delivering gas in a preset time period according to a preset control mode is stopped, and the medical ventilator is controlled to ventilate according to a preset ventilation mode.

[0027] In the above scheme, after the step of inhibiting the medical ventilator from delivering gas in a preset time period according to a preset control mode is performed, the method further comprises:

[0028] The medical ventilation device is controlled to perform ventilation according to a preset ventilation mode.

[0029] In the above scheme, after the step of measuring the target gas concentration in the preset time period is performed, the method further comprises:

[0030] Output the measured target gas concentration and / or waveform.

[0031] In the above scheme, before the step of inhibiting the medical ventilation device from delivering gas in the preset time period according to the preset control mode is performed, the method further comprises:

[0032] The patient is oxygen-enriched ventilated.

[0033] In the above scheme, when the step of measuring the target gas concentration in the preset time period is performed, the method further comprises:

[0034] Obtain the current gas delivery flow rate.

[0035] In the above scheme, after the step of measuring the target gas concentration in the preset time period is performed, the method further comprises:

[0036] Compensate the measured target gas concentration according to the current gas delivery flow rate.

[0037] In the above scheme, when the step of measuring the target gas concentration in the preset time period is performed, the method further comprises:

[0038] Obtain the patient's physiological sign parameters;

[0039] According to the patient's physiological sign data, determine whether the measured target gas concentration is abnormal.

[0040] In the above scheme, when the step of inhibiting the medical ventilation device from delivering gas in the preset time period according to the preset control mode is performed, the method further comprises:

[0041] Output at least one of the relevant parameters corresponding to the preset control mode, the preset time period, the patient's physiological sign parameters obtained in the preset time period and / or waveform, and the preset threshold value corresponding to the patient's physiological sign parameters.

[0042] The embodiment of the present application provides a gas concentration measuring device, which comprises:

[0043] The control module inhibits the medical ventilation device from delivering gas in a preset time period according to a preset control mode during ventilation.

[0044] The measuring module measures the target gas concentration in the preset time period; wherein the target gas concentration is the concentration of any one gas component in the patient's exhaled gas.

[0045] In the device, the preset control mode is to reduce the air flow or stop the air supply.

[0046] In the device, the step of controlling the medical ventilation device to deliver the gas in the preset time period according to the preset control mode comprises:

[0047] The preset inhibition period is obtained, and the medical ventilation device is periodically inhibited to deliver the gas in the preset time period according to the preset control mode according to the preset inhibition period.

[0048] In the device, the step of controlling the medical ventilation device to deliver the gas in the preset time period according to the preset control mode comprises:

[0049] The triggering instruction is received, and the medical ventilation device is inhibited to deliver the gas in the preset time period according to the preset control mode according to the triggering instruction.

[0050] In the device, the physiological parameter of the patient is obtained before the step of controlling the medical ventilation device to deliver the gas in the preset time period according to the preset control mode is executed, and the step of controlling the medical ventilation device to deliver the gas in the preset time period according to the preset control mode is executed only when the physiological parameter of the patient indicates that the patient is in a stable state.

[0051] In the device, the physiological parameter of the patient is obtained when the step of controlling the medical ventilation device to deliver the gas in the preset time period according to the preset control mode is executed, and the step of controlling the medical ventilation device to deliver the gas in the preset time period according to the preset control mode is stopped and the medical ventilation device is controlled to ventilate according to the preset ventilation mode and / or output an abnormality prompt of the patient if the physiological parameter of the patient indicates that the patient is in an abnormal state.

[0052] In the device, the measurement module starts to measure the target gas concentration at a time point that is a preset time interval away from the start time point of the preset time period.

[0053] In the device, if the measurement module measures a variation rule of the target gas concentration in the preset time period, the control module stops inhibiting the medical ventilation device to deliver the gas and controls the medical ventilation device to ventilate according to the preset ventilation mode.

[0054] In the device, when the step of controlling the medical ventilation device to deliver the gas in the preset time period according to the preset control mode is executed, if a stop instruction is received, the step of controlling the medical ventilation device to deliver the gas in the preset time period according to the preset control mode is stopped, and the medical ventilation device is controlled to ventilate according to the preset ventilation mode.

[0055] In the device, the control module controls the medical ventilation device to perform ventilation according to the preset ventilation mode after performing the step of inhibiting the medical ventilation device from delivering gas in the preset time period according to the preset control mode.

[0056] In the device, the measurement module outputs the measured target gas concentration and / or waveform after performing the step of measuring the target gas concentration in the preset time period.

[0057] In the device, the control module performs oxygen-enriched ventilation on the patient before performing the step of inhibiting the medical ventilation device from delivering gas in the preset time period according to the preset control mode.

[0058] In the device, the measurement module obtains the current gas delivery flow rate when performing the step of measuring the target gas concentration in the preset time period.

[0059] In the device, the measurement module compensates the measured target gas concentration according to the current gas delivery flow rate after performing the step of measuring the target gas concentration in the preset time period.

[0060] In the device, the measurement module obtains a physiological parameter of the patient when performing the step of measuring the target gas concentration in the preset time period; and determines whether the measured target gas concentration is abnormal according to the physiological parameter of the patient.

[0061] The embodiment of the present application provides a medical ventilation device comprising the gas concentration measurement device, which comprises a gas source, a breathing pipeline and a display.

[0062] The gas source provides gas during ventilation.

[0063] The breathing pipeline is connected with the gas source and provides a breathing path during ventilation.

[0064] The gas concentration measurement device is connected with the breathing pipeline, the gas source and the display.

[0065] The gas concentration measurement device measures the target gas concentration during ventilation.

[0066] The embodiment of the present application provides a computer readable storage medium, which is characterized by storing a gas concentration measurement program, and the gas concentration measurement program can be executed by a processor to realize the gas concentration measurement method.

[0067] It can be seen that, in the technical scheme of the embodiment of the present application, in the process of ventilation, the medical ventilation equipment is inhibited from gas delivery in a preset time period according to a preset control mode; the target gas concentration is measured in the preset time period; wherein the target gas concentration is the concentration of any one gas component in the patient's exhaled gas. Through the technical scheme of the embodiment of the present application, the target gas concentration in the patient's exhaled gas can be accurately measured when the patient is ventilated. BRIEF DESCRIPTION OF DRAWINGS

[0068] Figure 1 A structure schematic diagram of a gas concentration measuring device provided by the embodiment of the present application is shown in the figure.

[0069] Figure 2 A flowchart of a gas concentration measuring method provided by the embodiment of the present application is shown in the figure.

[0070] Figure 3 A schematic diagram of the change of airway pressure when the medical ventilation equipment is inhibited from ventilation by the embodiment of the present application is shown in the figure.

[0071] Figure 4 A schematic diagram of the change of gas flow rate when the medical ventilation equipment is inhibited from ventilation by the embodiment of the present application is shown in the figure.

[0072] Figure 5 A schematic diagram of the change of carbon dioxide concentration when the medical ventilation equipment is inhibited from ventilation by the embodiment of the present application is shown in the figure.

[0073] Figure 6 A structure schematic diagram of a medical ventilation equipment provided by the embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0074] In order to enable more detailed understanding of the features and technical contents of the embodiment of the present application, the implementation of the embodiment of the present application is described in detail below in combination with the drawings, and the drawings are only used for reference and do not limit the embodiment of the present application.

[0075] The embodiment of the present application provides a gas concentration measuring method applied to a medical ventilation equipment such as a breathing machine. It should be noted that in the embodiment of the present application, the gas concentration measuring method is executed by a gas concentration measuring device. Figure 1 A structure schematic diagram of a gas concentration measuring device provided by the embodiment of the present application is shown in the figure. As shown in the figure, the gas concentration measuring device comprises a control module 101 and a measuring module 102. The gas concentration measuring method in the present application is described in detail below based on the gas concentration measuring device. Figure 1

[0076] Figure 2 A flowchart of a gas concentration measuring method provided by the embodiment of the present application is shown in the figure. As shown in the figure, the gas concentration measuring method comprises the following steps. Figure 2 ​As shown, the gas concentration measurement method mainly comprises the following steps:

[0077] S201, in the process of ventilation, the medical ventilation equipment is inhibited from gas delivery according to a preset control mode within a preset time period.

[0078] In the embodiment of the present application, the control module 101 in the gas concentration measurement device can inhibit the medical ventilation equipment from gas delivery according to a preset control mode within a preset time period in the process of ventilation of the medical ventilation equipment.

[0079] It should be noted that in the embodiment of the present application, the medical ventilation equipment can be a ventilator, an anesthesia machine or other medical equipment with ventilation function. In addition, the ventilation mode of the medical ventilation equipment can be any one of invasive ventilation, non-invasive ventilation, oxygen therapy, and nasal catheter oxygen inhalation. The specific medical ventilation equipment and ventilation mode are not limited in the embodiment of the present application.

[0080] It should be noted that in the embodiment of the present application, the preset control mode is to reduce the gas flow or stop the gas supply. The specific preset control mode is not limited in the embodiment of the present application.

[0081] It can be understood that in the embodiment of the present application, the preset time period is set in advance in other concentration measurement devices. When the control module 101 inhibits the medical ventilation equipment from gas delivery by reducing the gas flow or stopping the gas supply, the time of inhibition is the preset time period. The specific preset time period is not limited in the embodiment of the present application.

[0082] For example, in the embodiment of the present application, the preset control mode is to reduce the gas flow, and the preset time period is A. The control module 101 controls the medical ventilation equipment to reduce the gas flow for A time to inhibit the medical ventilation equipment from gas delivery in the process of ventilation.

[0083] Specifically, in the embodiment of the present application, the step of inhibiting the medical ventilation equipment from gas delivery by the control module 101 according to the preset control mode within the preset time period comprises: obtaining a preset inhibition period; periodically inhibiting the medical ventilation equipment from gas delivery according to the preset control mode within the preset time period according to the preset inhibition period.

[0084] It should be noted that in the embodiment of the present application, the preset inhibition period is set in advance in the gas concentration measurement device to limit the periodic execution of inhibiting the medical ventilation equipment from gas delivery. The control module 101 can directly obtain the preset inhibition period. The specific preset inhibition period is not limited in the embodiment of the present application.

[0085] For example, in the embodiment of the present application, the preset control mode is to stop the gas supply, the preset time period is A, and the preset inhibition period is T. After obtaining the preset inhibition period T, the control module 101 stops the gas supply of the medical ventilation device for A time every T time during the invasive or non-invasive ventilation of the medical ventilation device, so as to inhibit the gas delivery of the medical ventilation device.

[0086] Specifically, in the embodiment of the present application, the step of inhibiting the gas delivery of the medical ventilation device by the control module 101 in the preset time period according to the preset control mode can further include: receiving a trigger instruction, and inhibiting the gas delivery of the medical ventilation device in the preset time period according to the preset control mode according to the trigger instruction.

[0087] It can be understood that, in the embodiment of the present application, the medical ventilation device or the gas concentration monitoring device can be provided with a display interface and a button, and the medical staff can perform touch operation on the display interface, or press a specific button, that is, send a start trigger instruction or an end trigger instruction to the control module 101 of the gas concentration monitoring device, so that the control module 101 can inhibit the gas delivery of the medical ventilation device in the preset time period between the start trigger instruction and the end trigger instruction according to the preset control mode after receiving the trigger instruction.

[0088] In the embodiment of the present application, before the step of inhibiting the gas delivery of the medical ventilation device in the preset time period according to the preset control mode, the control module 101 can further obtain a patient physiological parameter; and if the patient physiological parameter indicates that the patient is in a stable state, the step of inhibiting the gas delivery of the medical ventilation device in the preset time period according to the preset control mode is performed.

[0089] It can be understood that, in the embodiment of the present application, the control module 101 inhibits the gas delivery of the medical ventilation device, which will have a certain impact on the patient using the medical ventilation device for ventilation. Therefore, the control module 101 can first obtain a patient physiological parameter to determine whether it is suitable to inhibit the gas delivery of the medical ventilation device at present, so as to avoid inhibiting the gas delivery of the medical ventilation device in the case that the patient is in a poor state, aggravating the patient's condition, or causing the patient to be in a dangerous situation.

[0090] It should be noted that, in the embodiment of the present application, the patient physiological parameter at least includes one of the following: heart rate, blood oxygen, pulse, respiratory rate, peak pressure, mean pressure, blood pressure, tidal volume and body temperature, and of course, other parameters that can reflect the state of the patient can also be included. The specific patient physiological parameter is not limited in the embodiment of the present application.

[0091] It should be noted that in the embodiments of the present application, the control module 101 can directly acquire the physiological sign data of the patient collected by the related device or equipment, for example, the electrocardiogram of the patient can be extracted by attaching the electrode to the body of the patient and provided to the control module 101, and the specific method for acquiring the physiological sign parameter of the patient is not limited in the embodiments of the present application.

[0092] In the embodiments of the present application, when the control module 101 performs the step of inhibiting the gas delivery of the medical ventilation equipment in the preset time period according to the preset control mode, the physiological sign parameter of the patient can also be acquired, and if the physiological sign parameter of the patient indicates that the patient is in an abnormal state, the step of inhibiting the gas delivery of the medical ventilation equipment in the preset time period according to the preset control mode is stopped, and the medical ventilation equipment is controlled to perform ventilation according to the preset ventilation mode and / or output a patient abnormality prompt.

[0093] It can be understood that in the embodiments of the present application, when the control module 101 inhibits the gas delivery of the medical ventilation equipment, the physiological sign parameter of the patient is acquired to determine whether the patient is uncomfortable or abnormal, and if the patient is uncomfortable or abnormal, the current inhibition control of the medical ventilation equipment can be stopped in time and / or a prompt can be given, so as to avoid aggravating the patient's condition or causing a dangerous situation of the patient.

[0094] It should be noted that in the embodiments of the present application, the control module 101 can determine whether the physiological sign parameter of the patient indicates that the patient is in a stable state or an abnormal state according to a preset mode.

[0095] Specifically, in the embodiments of the present application, the control module 101 can prestore the related threshold of the physiological sign parameter of the patient, for example, a maximum threshold and a minimum threshold, if the physiological sign parameter of the patient is less than or equal to the maximum threshold and greater than or equal to the minimum threshold, the control module 101 determines that the patient is in a stable state, and if the physiological sign parameter of the patient is greater than the maximum threshold or less than the minimum threshold, the control module 101 determines that the patient is in an abnormal state, and the specific maximum threshold and minimum threshold can be set by the user according to the actual demand or determined by the internal calculation of the control module 101.

[0096] Specifically, in the embodiments of the present application, the control module 101 can also calculate the change rate of the physiological sign parameter of the patient and compare the pre-stored change rate threshold, if the change rate of the physiological sign parameter of the patient is less than or equal to the preset change rate threshold, it is determined that the patient is in a stable state, and if the change rate of the physiological sign parameter of the patient is greater than the change rate threshold, it is determined that the patient is in an abnormal state, and the specific change rate threshold can be set by the user according to the actual demand or determined by the internal calculation of the control module 101.

[0097] Specifically, in the embodiment of the present application, the control module 101 can also determine whether the patient is in a stable state or an abnormal state according to the patient physiological parameter and the rate of change of the patient physiological parameter at the same time, that is, if the patient physiological parameter is greater than the maximum threshold value or less than the minimum threshold value, and the rate of change of the patient physiological parameter is greater than the rate of change threshold value, it is determined that the patient is in an abnormal state, and in other cases, it is determined that the patient is in a stable state. The specific maximum threshold value, minimum threshold value, and rate of change threshold value can be set by the user according to the actual needs or determined by the internal calculation of the control module 101.

[0098] It should be noted that in the embodiment of the present application, the control module 101 controls the medical ventilation device to ventilate according to the preset ventilation mode, wherein the preset ventilation mode can be the ventilation mode before the medical ventilation device suppresses gas delivery, or other ventilation modes different from the ventilation mode before the medical ventilation device suppresses gas delivery. The specific preset ventilation mode is not limited in the embodiment of the present application.

[0099] It should be noted that in the embodiment of the present application, the control module 101 can output the patient abnormality prompt to the display configured on the medical ventilation device. Of course, the gas concentration measuring device itself can also be configured with a separate display module, and the control module 101 outputs the patient abnormality prompt to the display module. After the medical staff sees it, they can timely make corresponding treatment to avoid accidents of the patient. Of course, the gas concentration measuring device or the medical ventilation device can also include an alarm module, and the control module 101 outputs the patient abnormality prompt to the alarm module, and the alarm module immediately issues an alarm prompt sound.

[0100] In the embodiment of the present application, when the control module 101 executes the step of suppressing gas delivery of the medical ventilation device according to the preset control mode in the preset time period, if a stop instruction is received, the step of suppressing gas delivery of the medical ventilation device according to the preset control mode in the preset time period is stopped, and the medical ventilation device is controlled to ventilate according to the preset ventilation mode. Of course, the ventilation according to the preset ventilation mode can also be the ventilation mode before the gas concentration measurement is restored.

[0101] It can be understood that in the embodiment of the present application, the medical staff can also send a stop instruction to the control module 101 through the display interface and the corresponding specific button set on the medical ventilation device or the gas concentration measuring device, to stop suppressing gas delivery of the medical ventilation device at any time within the preset time period, and control the medical ventilation device to ventilate according to the preset ventilation mode.

[0102] In the embodiment of the present application, the control module 101 controls the medical ventilation device to perform ventilation in the preset ventilation mode after the step of inhibiting the medical ventilation device from delivering gas in the preset control mode for the preset time period.

[0103] It can be understood that in the embodiment of the present application, if the control module 101 does not receive the stop instruction or the acquired physiological parameters of the patient indicate that the patient is in a normal state within the preset time period, the control module 101 will continue to inhibit the medical ventilation device from delivering gas in the preset control mode until the end of the preset time period, and then control the medical ventilation device to perform ventilation in the preset ventilation mode.

[0104] In the embodiment of the present application, the control module 101 can perform oxygen-increasing ventilation during non-invasive or invasive ventilation according to the preset oxygen concentration before the step of inhibiting the medical ventilation device from delivering gas in the preset control mode for the preset time period. Of course, the preset oxygen concentration for performing oxygen-increasing ventilation can be input by a doctor or pre-stored, or calculated according to the physiological parameters of the patient, the state of the patient, the age of the patient, the ventilation parameters, the preset time period for inhibiting ventilation, etc.

[0105] It can be understood that in the embodiment of the present application, the control module 101 inhibits the medical ventilation device from delivering gas, and the patient using the medical ventilation device for ventilation will lack oxygen for a preset time period. Therefore, before the inhibition, the control module 101 performs oxygen-increasing ventilation according to the preset oxygen concentration to reduce the hypoxia of the patient during the inhibition of gas delivery.

[0106] It should be noted that in the embodiment of the present application, the control module 101 can output at least one of the following during the step of inhibiting the medical ventilation device from delivering gas in the preset control mode for the preset time period: the related parameters corresponding to the preset control mode, the preset time period, the physiological parameters of the patient acquired within the preset time period and / or the waveform, and the preset threshold corresponding to the physiological parameters of the patient. The medical care operator can view these data in real time to make corresponding operations according to actual needs.

[0107] S202, measuring a target gas concentration within a preset time period; wherein the target gas concentration is the concentration of any one gas component in the exhaled gas of the patient.

[0108] In the embodiment of the present application, the control module 101 of the gas concentration measuring device inhibits the medical ventilation device from delivering gas in the preset control mode for the preset time period, and the measuring module 102 measures the target gas concentration within the preset time period.

[0109] It should be noted that in the embodiment of the present application, the target gas concentration is the concentration of any gas component in the patient's exhaled gas, such as carbon dioxide, oxygen, etc.

[0110] It can be understood that in the embodiment of the present application, the measurement module 102 measures the target gas concentration when the medical ventilation device is inhibited from gas delivery for a preset time period, which can reduce the dilution degree of the patient's exhaled gas by the fresh gas delivered by the patient, so as to accurately measure the concentration of the target gas in the patient's exhaled gas.

[0111] Figure 3 A schematic diagram of the change of airway pressure when the medical ventilation device is inhibited from ventilation in the embodiment of the present application Figure 1 As shown in Figure 3 , when the control module 101 inhibits the medical ventilation device from gas delivery in the manner of reducing the gas flow or stopping the gas delivery, the airway pressure will rapidly decrease from t1 time, and when the medical ventilation device is ventilated according to the preset ventilation mode at t2 time, i.e. the end time of the preset time period, the airway pressure will rapidly increase. Figure 4 A schematic diagram of the change of the gas flow rate when the medical ventilation device is inhibited from ventilation in the embodiment of the present application. As shown in Figure 4 , when the control module 101 inhibits the medical ventilation device from gas delivery in the manner of reducing the gas flow or stopping the gas delivery, the gas flow rate will rapidly decrease. Figure 5 A schematic diagram of the change of the carbon dioxide concentration when the medical ventilation device is inhibited from ventilation in the embodiment of the present application. As shown in Figure 4 , the measurement module 102 measures the carbon dioxide concentration in the preset time period when the control module 101 inhibits the medical ventilation device from gas delivery in the manner of reducing the gas flow or stopping the gas delivery, i.e. between t1 time and t2 time, the measured carbon dioxide concentration value is obviously higher than the measured value at other times, and the accurate carbon dioxide concentration value is measured due to the inhibition of the medical ventilation device from gas delivery in step S201.

[0112] In the embodiment of the present application, the step of measuring the target gas concentration by the measurement module 102 in the preset time period comprises: starting to measure the target gas concentration at a time point which is a preset time interval away from the start time point of the preset time period.

[0113] In order to measure more accurate target gas concentration, the measurement of the target gas concentration can also be started after a period of inhibition of gas delivery, i.e. after a period of time away from the start time point of the preset time period. Of course, the measurement module 102 can also start to measure the target gas concentration as soon as the control module 102 starts to inhibit the medical ventilation device from gas delivery. The specific preset time interval is not limited in the embodiment of the present application.

[0114] Exemplarily, in the embodiment of the present application, the preset control mode is to reduce the air flow, the preset time period is A, and the preset time interval is B. The control module 101 controls the medical ventilation device to reduce the air flow for a duration A during ventilation, and specifically, after the air flow is reduced, the measuring module 102 starts to measure the target gas concentration after a duration B.

[0115] In the embodiment of the present application, the step of measuring the target gas concentration by the measuring module 102 within the preset time period includes: if the change rule of the target gas concentration measured within the preset time period is regular, stopping the step of inhibiting the gas delivery of the medical ventilation device according to the preset control mode within the preset time period, and controlling the medical ventilation device to ventilate according to the preset ventilation mode.

[0116] It can be understood that, in the embodiment of the present application, the measuring module 102 can measure the target gas concentration within the preset time period all the time, and thus, the change of the target gas concentration can be judged in real time. If the change rule is regular, it means that the measurement is relatively stable, and the target gas concentration measured is relatively accurate. Figure 5 As shown in FIG. 6, between t1 and t2, the change of the end-tidal carbon dioxide concentration measured at the beginning is irregular, and the concentration measured in the following two time periods starts to change regularly, that is, the measured value tends to be stable. Therefore, even if the preset time period is not reached, the measuring module 102 can end the measurement, and the control module 101 directly stops the step of inhibiting the gas delivery, so as to restore the original ventilation mode as soon as possible, or ventilate normally according to other ventilation modes.

[0117] It should be noted that, in the embodiment of the present application, after the step of measuring the target gas concentration within the preset time period is performed by the measuring module 102, the measuring module 102 can also output the target gas concentration and / or waveform. The medical staff can make relevant medical diagnosis by checking the target gas concentration and / or waveform. The specific output form is not limited in the embodiment of the present application.

[0118] In the embodiment of the present application, when the step of measuring the target gas concentration within the preset time period is performed by the measuring module 102, the measuring module 102 can also perform the following step: acquiring the current air flow rate.

[0119] It should be noted that in the embodiment of the present application, the control module 101 suppresses the medical ventilation device to deliver gas in the manner of reducing the gas flow or stopping the gas delivery, i.e. reducing the gas flow rate or directly controlling the gas flow rate to be 0, and the measurement module 102 can directly measure the current gas flow rate when the medical ventilation device delivers gas. In addition, the measurement module 102 can also measure the ventilation parameters when the medical ventilation device delivers gas, such as the patient end pressure, the machine end pressure and the leakage amount, and calculate the current gas flow rate through the ventilation parameters, i.e. indirectly obtain the current gas flow rate. The specific way of obtaining the current gas flow rate is not limited in the embodiment of the present application.

[0120] In the embodiment of the present application, the measurement module 102 obtains the current gas flow rate, and therefore, after the step of measuring the target gas concentration in the preset time period is performed, the following step can also be performed: compensating the measured target gas concentration according to the current gas flow rate.

[0121] It should be noted that in the embodiment of the present application, the concentration compensation formula can be determined in advance according to actual needs, and the current gas flow rate and the measured target gas concentration are substituted into the concentration compensation formula to compensate the measured target gas concentration, so as to obtain the compensated target gas concentration, which is the more real target gas concentration. The specific concentration compensation formula is not limited in the embodiment of the present application.

[0122] For example, in the embodiment of the present application, the end-tidal carbon dioxide concentration is measured, and the concentration compensation formula can be determined in advance as follows:

[0123] EtCO2(0)=f(EtCO2(n), Flow(n)) (1)

[0124] Wherein, EtCO2(0) is the compensated end-tidal carbon dioxide concentration, EtCO2(n) is the measured end-tidal carbon dioxide concentration, and Flow(n) is the current gas flow rate.

[0125] It should be noted that in the embodiment of the present application, the specific formula (1) can be determined according to actual needs, and the following example illustrates the method of determining the concentration compensation formula.

[0126] For example, in the embodiment of the present application, the gas flow rate and the measured end-tidal carbon dioxide concentration are negatively correlated, and assuming that they are in a linear relationship, the concentration compensation formula can be assumed as follows:

[0127] EtCO2(n)=EtCO2(0)-b×Flow(n) (2)

[0128] Wherein, b is a compensation coefficient, the end-tidal carbon dioxide concentration at different air flow rates can be measured, and the value of b is determined by substituting into formula (2).

[0129] For example, in an embodiment of the present application, the end-tidal carbon dioxide concentration EtCO2(5) at an air flow rate of 5 LPM is measured, and the end-tidal carbon dioxide concentration EtCO2(10) at an air flow rate of 10 LPM is measured, and formula (2) is obtained by substituting as follows:

[0130] EtCO2(5) = EtCO2(0) - b x 5 (3)

[0131] EtCO2(10) = EtCO2(0) - b x 10 (4)

[0132] By combining formula (3) and formula (4), b can be determined as follows:

[0133] b = (EtCO2(5) - EtCO2(10)) / 5 (5)

[0134] The specific value of b determined is substituted into formula (2) to obtain the determined concentration compensation formula.

[0135] For example, in an embodiment, the air flow rate and the measured end-tidal carbon dioxide concentration are negatively correlated, and it is assumed that they are inversely related, so it is assumed that the concentration compensation formula is specifically:

[0136] EtCO2(n) = EtCO2(0) / (1 + b x Flow(n)) (6)

[0137] Wherein, b is a compensation coefficient, the end-tidal carbon dioxide concentration at different air flow rates can be measured, and the value of b is determined by substituting into formula (6).

[0138] For example, in another embodiment, the end-tidal carbon dioxide concentration EtCO2(5) at an air flow rate of 5 LPM is measured, and the end-tidal carbon dioxide concentration EtCO2(10) at an air flow rate of 10 LPM is measured, and formula (6) is obtained by substituting as follows:

[0139] EtCO2(5) = EtCO2(0) / (1 + b x 5) (7)

[0140] EtCO2(10) = EtCO2(0) / (1 + b x 10) (8)

[0141] By combining formula (7) and formula (8), b can be determined as follows:

[0142] b = (EtCO2(5) - EtCO2(10)) / (10 x EtCO2(10) - 5 x EtCO2(5)) (9)

[0143] Substitute the specific value of b into formula (6), and the determined concentration compensation formula is obtained.

[0144] It can be understood that in the embodiments of the present application, after the compensation parameter b is determined, the two concentration compensation formulas described above can be substituted with the actually measured end-tidal carbon dioxide concentration and the current gas flow rate obtained when measuring the end-tidal carbon dioxide concentration in the actual measurement process to calculate the compensated end-tidal carbon dioxide concentration.

[0145] It should be noted that in the embodiments of the present application, when the measurement module 102 performs the step of measuring the target gas concentration in the preset time period, it can also perform the following steps: obtaining the patient's physiological parameter; determining whether the measured target gas concentration is abnormal according to the patient's physiological data.

[0146] It can be understood that in the embodiments of the present application, when the measurement module 102 performs the step of measuring the target gas concentration in the preset time period, the patient's nose mask may be loose, the patient may be crying, or the patient may be coughing, which will affect the measurement, and the specific manifestation is that the patient's physiological parameter fluctuates, for example, when the patient cries, the heart rate accelerates, and at this time the measured target gas concentration is abnormal, that is, inaccurate. The specific way of determining whether the target gas concentration is abnormal is not limited in the embodiments of the present application.

[0147] The embodiments of the present application provide a gas concentration measurement method, which is applied to a medical ventilation device. In the process of ventilation, the medical ventilation device is inhibited from delivering gas in a preset time period according to a preset control mode; the target gas concentration is measured in the preset time period; wherein the target gas concentration is the concentration of any one gas component in the patient's exhaled gas. That is, the technical solution of the embodiments of the present application can accurately measure the target gas concentration in the patient's exhaled gas when the patient is ventilated.

[0148] Another embodiment of the present application provides a gas concentration measurement device. As shown in Figure 1 The device comprises:

[0149] The control module 101 inhibits the medical ventilation device from delivering gas in a preset time period according to a preset control mode in the process of ventilation;

[0150] The measurement module 102 measures the target gas concentration in the preset time period; wherein the target gas concentration is the concentration of any one gas component in the patient's exhaled gas.

[0151] Optionally, the preset control mode is to reduce the air flow or stop the air supply.

[0152] Optionally, the step of controlling the medical ventilator to deliver the gas in the preset time period according to the preset control mode comprises:

[0153] acquiring a preset inhibition period; and periodically inhibiting the medical ventilator to deliver the gas in the preset time period according to the preset control mode according to the preset inhibition period.

[0154] Optionally, the step of controlling the medical ventilator to deliver the gas in the preset time period according to the preset control mode comprises:

[0155] receiving a trigger instruction, and inhibiting the medical ventilator to deliver the gas in the preset time period according to the preset control mode according to the trigger instruction.

[0156] Optionally, the control module 101 acquires the physiological parameter of the patient before executing the step of inhibiting the medical ventilator to deliver the gas in the preset time period according to the preset control mode; and if the physiological parameter of the patient indicates that the patient is in a stable state, the step of inhibiting the medical ventilator to deliver the gas in the preset time period according to the preset control mode is executed.

[0157] Optionally, the control module 101 acquires the physiological parameter of the patient when executing the step of inhibiting the medical ventilator to deliver the gas in the preset time period according to the preset control mode; and if the physiological parameter of the patient indicates that the patient is in an abnormal state, the step of inhibiting the medical ventilator to deliver the gas in the preset time period according to the preset control mode is stopped, and the medical ventilator is controlled to ventilate according to the preset ventilation mode and / or output an abnormality prompt of the patient.

[0158] Optionally, the measurement module 102 starts to measure the target gas concentration at a time point that is a preset time interval away from a starting time point of the preset time period.

[0159] Optionally, if the measurement module 102 measures a variation rule of the target gas concentration in the preset time period, the control module stops inhibiting the medical ventilator to deliver the gas, and controls the medical ventilator to ventilate according to the preset ventilation mode.

[0160] Optionally, when the control module 101 executes the step of inhibiting the medical ventilator to deliver the gas in the preset time period according to the preset control mode, if a stop instruction is received, the step of inhibiting the medical ventilator to deliver the gas in the preset time period according to the preset control mode is stopped, and the medical ventilator is controlled to ventilate according to the preset ventilation mode.

[0161] Optionally, the control module 101 controls the medical ventilation device to perform ventilation according to the preset ventilation mode after performing the step of inhibiting the medical ventilation device from delivering gas according to the preset control mode within the preset time period.

[0162] Optionally, the measurement module 102 outputs the measured target gas concentration and / or waveform after performing the step of measuring the target gas concentration within the preset time period.

[0163] Optionally, the control module 101 performs oxygenation ventilation on the patient before performing the step of inhibiting the medical ventilation device from delivering gas according to the preset control mode within the preset time period.

[0164] Optionally, the measurement module 102 acquires the current gas delivery flow rate when performing the step of measuring the target gas concentration within the preset time period.

[0165] Optionally, the measurement module 102 compensates the measured target gas concentration according to the current gas delivery flow rate after performing the step of measuring the target gas concentration within the preset time period.

[0166] Optionally, the measurement module 102 acquires a physiological parameter of the patient when performing the step of measuring the target gas concentration within the preset time period; and determines whether the measured target gas concentration is abnormal according to the physiological parameter of the patient.

[0167] The embodiment of the present application provides a gas concentration measuring device, which inhibits a medical ventilation device from delivering gas according to a preset control mode within a preset time period during ventilation; and measures a target gas concentration within the preset time period; wherein the target gas concentration is the concentration of any one gas component in the exhaled gas of a patient. That is, the gas concentration measuring device provided by the embodiment of the present application can accurately measure the target gas concentration in the exhaled gas of the patient during ventilation.

[0168] The embodiment of the present application further provides a medical ventilation device. Figure 6 A structural schematic diagram of the medical ventilation device provided by the embodiment of the present application is shown in FIG. 1. Figure 6 As shown in FIG. 1, the medical ventilation device comprises the above-mentioned gas concentration measuring device 601, and further comprises a gas source 602, a breathing pipeline 603 and a display 604.

[0169] The gas source 602 provides gas during ventilation.

[0170] The breathing pipeline 603 is connected with the gas source 602, and provides a breathing path during ventilation.

[0171] The gas concentration measuring device 601 is connected with the breathing pipeline 603, the gas source 602 and the display 604.

[0172] The gas concentration measuring device 601 measures the target gas concentration during the ventilation process.

[0173] For a ventilator, especially a neonatal ventilator, the gas concentration measuring method or the gas concentration measuring device provided in the embodiment can improve the accuracy of gas concentration measurement by inhibiting gas delivery for a preset time period.

[0174] The computer readable storage medium stores a gas concentration measuring program, and the gas concentration measuring program can be executed by a processor to implement the above-mentioned gas concentration measuring method. The computer readable storage medium can be a volatile memory such as a random access memory (RAM), or a non-volatile memory such as a read-only memory (ROM), a flash memory, a hard disk drive (HDD) or a solid-state drive (SSD). The computer readable storage medium can also be a device including one or any combination of the above-mentioned memories, such as a mobile phone, a computer, a tablet device, a personal digital assistant, etc.

[0175] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can be in the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can be in the form of a computer program product implemented on one or more computer usable storage media (including but not limited to magnetic disk storage and optical storage, etc.) containing computer usable program code.

[0176] The present application is described with reference to flowcharts and / or block diagrams of the method, device (system), and computer program product according to the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, as well as a combination of flows and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable signal processing devices to produce a machine, so that the instructions executed by the computer or other programmable signal processing devices produce a device that implements the functions specified in the flowcharts and / or block diagrams. Figure 1 The device that implements the functions specified in one or more flows and / or blocks. Figure 1 The device that implements the functions specified in one or more flows and / or blocks.

[0177] These computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable signal processing device to function in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture including instructions which implement the flow Figure 1 one or more flows and / or blocks Figure 1 one or more blocks or multiple blocks.

[0178] These computer program instructions can also be loaded onto a computer or other programmable signal processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer implemented process such that the instructions executed on the computer or other programmable device provide steps for implementing the flow Figure 1 one or more flows and / or blocks Figure 1 one or more blocks or multiple blocks.

[0179] The above description is only the preferred embodiment of the present application, not intended to limit the protection scope of the present application.

[0180] Industrial applicability

[0181] In the technical scheme of the embodiment of the present application, in the process of ventilation, the medical ventilation equipment is inhibited from delivering gas in a preset time period according to a preset control mode; the target gas concentration is measured in the preset time period; wherein the target gas concentration is the concentration of any gas component in the patient's exhaled gas. That is to say, the gas concentration measuring device provided by the embodiment of the present application can accurately measure the target gas concentration in the patient's exhaled gas when the patient is ventilated.

Claims

1. A method of measuring concentration of a gas, which is carbon dioxide, applied to a medical ventilator, characterized in that, The method comprises: During ventilation, the medical ventilator is inhibited from gas delivery according to a preset control mode within a preset time period; the preset time period is preset in the gas concentration measuring device; one preset time period spans multiple breathing cycles; The target gas concentration is measured within the preset time period; The step of inhibiting the medical ventilator from gas delivery according to the preset control mode within the preset time period comprises: obtaining a preset inhibition period; and periodically inhibiting the medical ventilator from gas delivery according to the preset control mode within the preset time period according to the preset inhibition period; The step of periodically inhibiting the medical ventilator from gas delivery according to the preset control mode within the preset time period according to the preset inhibition period comprises: controlling the medical ventilator to inhibit gas delivery for the preset time period every time interval corresponding to the preset inhibition period; Before the step of inhibiting the medical ventilator from gas delivery according to the preset control mode within the preset time period is performed, the method further comprises: Obtaining a patient physiological parameter; The step of inhibiting the medical ventilator from gas delivery according to the preset control mode within the preset time period is performed only if the patient physiological parameter indicates that the patient is in a stable state; While the step of inhibiting the medical ventilator from gas delivery according to the preset control mode within the preset time period is performed, the method further comprises: Obtaining a patient physiological parameter; If the patient physiological parameter indicates that the patient is in an abnormal state, the step of inhibiting the medical ventilator from gas delivery according to the preset control mode within the preset time period is stopped, and the medical ventilator is controlled to ventilate according to a preset ventilation mode and / or output a patient abnormality prompt.

2. The method of claim 1, wherein, The preset control mode is to reduce the gas flow or stop gas delivery.

3. The method of claim 1, wherein, The step of measuring the target gas concentration within the preset time period comprises: The target gas concentration is measured at a time interval of a preset time interval from the start time of the preset time period.

4. The method of claim 1, wherein, The step of measuring the target gas concentration within the preset time period comprises: If the measured target gas concentration within the preset time period changes regularly, the step of inhibiting the medical ventilator from gas delivery according to the preset control mode within the preset time period is stopped, and the medical ventilator is controlled to ventilate according to a preset ventilation mode.

5. The method of claim 1, wherein, While the step of inhibiting gas delivery according to the preset control mode within the preset time period is performed, the method further comprises: If a stop instruction is received, the step of inhibiting the medical ventilator from gas delivery according to the preset control mode within the preset time period is stopped, and the medical ventilator is controlled to ventilate according to a preset ventilation mode.

6. The method of claim 1, wherein, After the step of inhibiting the medical ventilator from gas delivery according to the preset control mode within the preset time period is performed, the method further comprises: The medical ventilator is controlled to ventilate according to a preset ventilation mode.

7. The method of claim 1, wherein, After the step of measuring the target gas concentration in the preset time period, the method further comprises: outputting the measured target gas concentration and / or waveform.

8. The method of claim 1, wherein, Before the step of inhibiting the medical ventilation device from delivering gas in the preset time period according to the preset control mode, the method further comprises: performing oxygenation ventilation on the patient.

9. The method of claim 1, wherein, When the step of measuring the target gas concentration in the preset time period is performed, the method further comprises: obtaining the current gas delivery flow rate.

10. The method of claim 9, wherein, After the step of measuring the target gas concentration in the preset time period, the method further comprises: compensating the measured target gas concentration according to the current gas delivery flow rate.

11. The method of claim 1, wherein, When the step of measuring the target gas concentration in the preset time period is performed, the method further comprises: obtaining the patient physiological parameter; determining whether the measured target gas concentration is abnormal according to the patient physiological parameter.

12. The method of claim 1, wherein, When the step of inhibiting the medical ventilation device from delivering gas in the preset time period according to the preset control mode is performed, the method further comprises: outputting at least one of the relevant parameters corresponding to the preset control mode, the preset time period, the patient physiological parameter obtained in the preset time period and / or waveform, and the preset threshold corresponding to the patient physiological parameter.

13. A gas concentration measuring device applied to a medical ventilation apparatus, the gas being carbon dioxide, characterized by, The device comprises: a control module, which, in the process of ventilation, inhibits the medical ventilation device from delivering gas in a preset time period according to a preset control mode; the preset time period is pre-set in the gas concentration measuring device; one preset time period spans multiple breathing cycles; and a measuring module, which measures the target gas concentration in the preset time period. The step of inhibiting the medical ventilation device from delivering gas in the preset time period according to the preset control mode by the control module comprises: obtaining a preset inhibition period; and periodically inhibiting the medical ventilation device from delivering gas in the preset time period according to the preset control mode according to the preset inhibition period. The periodically inhibiting the medical ventilation device from delivering gas in the preset time period according to the preset control mode according to the preset inhibition period comprises: controlling the medical ventilation device to inhibit gas delivery for the preset time period every time interval corresponding to the preset inhibition period. Before the step of inhibiting the medical ventilation device from delivering gas in the preset time period according to the preset control mode is performed, the control module obtains the patient physiological parameter; and if the patient physiological parameter indicates that the patient is in a stable state, the step of inhibiting the medical ventilation device from delivering gas in the preset time period according to the preset control mode is performed. The control module acquires a patient physiological parameter when executing the step of inhibiting the medical ventilator from delivering gas in the preset time period according to the preset control mode; if the patient physiological parameter indicates that the patient is in an abnormal state, the control module stops the step of inhibiting the medical ventilator from delivering gas in the preset time period according to the preset control mode, and controls the medical ventilator to ventilate according to a preset ventilation mode and / or outputs an abnormal patient prompt.

14. The apparatus of claim 13, wherein, The preset control mode is to reduce the gas flow or stop the gas delivery.

15. The device of claim 13, wherein, The measurement module starts to measure the target gas concentration at a time point that is a preset time interval from the start time point of the preset time period.

16. The device of claim 13, wherein, If the measurement module measures a target gas concentration variation rule in the preset time period, the control module stops inhibiting the medical ventilator from delivering gas, and controls the medical ventilator to ventilate according to a preset ventilation mode.

17. The apparatus of claim 13, wherein, The control module stops executing the step of inhibiting the medical ventilator from delivering gas in the preset time period according to the preset control mode, and controls the medical ventilator to ventilate according to a preset ventilation mode if a stop instruction is received when executing the step of inhibiting the medical ventilator from delivering gas in the preset time period according to the preset control mode.

18. The device of claim 13, wherein, The control module controls the medical ventilator to ventilate according to a preset ventilation mode after executing the step of inhibiting the medical ventilator from delivering gas in the preset time period according to the preset control mode.

19. The device of claim 13, wherein, The measurement module outputs the measured target gas concentration and / or waveform after executing the step of measuring the target gas concentration in the preset time period.

20. The device of claim 13, wherein, The control module performs oxygenation ventilation on the patient before executing the step of inhibiting the medical ventilator from delivering gas in the preset time period according to the preset control mode.

21. The device of claim 13, wherein, The measurement module acquires a current gas flow rate when executing the step of measuring the target gas concentration in the preset time period.

22. The device of claim 21, wherein, The measurement module compensates the measured target gas concentration according to the current gas flow rate after executing the step of measuring the target gas concentration in the preset time period.

23. The device of claim 13, wherein, The measurement module acquires a patient physiological parameter when executing the step of measuring the target gas concentration in the preset time period; and judges whether the measured target gas concentration is abnormal according to the patient physiological parameter.

24. A medical ventilator comprising the gas concentration measuring device according to any one of claims 13 to 23, characterized in that, The device comprises a gas source, a breathing pipeline, and a display; The gas source provides gas during ventilation; The breathing pipeline is connected with the gas source to provide a breathing path during invasive or non-invasive ventilation. The gas concentration measuring device is connected with the breathing pipeline, the gas source and the display. The gas concentration measuring device measures the target gas concentration during the invasive or non-invasive ventilation.

25. The medical ventilation device of claim 24, wherein, The medical ventilation equipment is a neonatal ventilator.

26. A computer readable storage medium, characterized in that, The computer readable storage medium stores a gas concentration measuring program which can be executed by the processor to implement the gas concentration measuring method in any one of claims 1-12.

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