CN113874061A - Gas concentration measuring method and device, medical ventilation equipment and storage medium - Google Patents

Gas concentration measuring method and device, medical ventilation equipment and storage medium Download PDF

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Publication number
CN113874061A
CN113874061A CN201980093591.2A CN201980093591A CN113874061A CN 113874061 A CN113874061 A CN 113874061A CN 201980093591 A CN201980093591 A CN 201980093591A CN 113874061 A CN113874061 A CN 113874061A
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China
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preset
time period
patient
preset time
medical
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CN201980093591.2A
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Inventor
邹心茹
刘宏程
刘京雷
张飚瑞
周小勇
张芳
颜永生
蔺铁锚
罗招平
王彦飞
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Shanxi Children's Hospital
Shenzhen Mindray Bio Medical Electronics Co Ltd
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Shanxi Children's Hospital
Shenzhen Mindray Bio Medical Electronics Co Ltd
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Publication of CN113874061A publication Critical patent/CN113874061A/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/20—Valves specially adapted to medical respiratory devices

Abstract

A gas concentration measuring method is applied to a medical ventilation device, and in the ventilation process, the medical ventilation device is inhibited from carrying out gas transmission within a preset time period according to a preset control mode (S201); measuring the concentration of the target gas within a preset time period; wherein the target gas concentration is the concentration of any one of the gas components in the exhaled gas of the patient (S202).

Description

Gas concentration measuring method and device, medical ventilation equipment and storage medium Technical Field
The embodiment of the invention relates to the technical field of medical instruments, in particular to a gas measuring method and device, medical ventilation equipment and a storage medium.
Background
During the mechanical ventilation process of a patient, medical ventilation equipment such as a respirator and an anesthesia machine needs to measure the concentration of end-tidal carbon dioxide of the patient to help a doctor analyze the ventilation condition of the patient and judge whether the patient has hypercapnia and hypocapnia.
However, there is currently no method available to accurately measure the end-tidal carbon dioxide concentration.
Disclosure of Invention
In order to solve the above technical problems, embodiments of the present invention desirably provide a gas concentration measurement method and apparatus, a medical ventilator, and a storage medium, which are capable of accurately measuring a target gas concentration in exhaled gas of a patient by suppressing gas delivery for a certain period of time to reduce or eliminate dilution of the exhaled gas of a patient by fresh gas when the patient is ventilated.
The technical scheme of the embodiment of the invention can be realized as follows:
the embodiment of the invention provides a gas concentration measuring method which is applied to medical ventilation equipment and comprises the following steps:
during the ventilation process, inhibiting the medical ventilation equipment from carrying out gas delivery within a preset time period according to a preset control mode;
measuring the concentration of the target gas within a preset time period; wherein the target gas concentration is the concentration of any one gas component in the expired gas of the patient.
In the above scheme, the preset control mode is to reduce the air flow or stop air supply.
In the above solution, the step of inhibiting the medical ventilator from performing gas delivery for a preset time period according to a preset control manner includes:
acquiring a preset inhibition period;
and periodically inhibiting the gas delivery of the medical ventilator for a preset time period according to a preset inhibition period according to a preset control mode.
In the above solution, the step of inhibiting the medical ventilator from performing gas delivery for a preset time period according to a preset control manner includes:
and receiving a trigger instruction, and inhibiting the medical ventilation equipment from carrying out gas delivery within a preset time period according to the trigger instruction in a preset control mode.
In the foregoing aspect, before performing the step of inhibiting gas delivery by the medical ventilator for a preset period of time in a preset control manner, the method further includes:
acquiring physiological sign parameters of a patient;
and if the physiological sign parameters of the patient indicate that the patient is in a steady state, the step of inhibiting the medical ventilator from carrying out gas delivery within a preset time period according to a preset control mode is executed.
In the foregoing aspect, when performing the step of inhibiting gas delivery by the medical ventilator for a preset period of time in a preset control manner, the method further includes:
acquiring physiological sign parameters of a patient;
and if the physiological sign parameters of the patient indicate that the patient is in an abnormal state, stopping executing the step of inhibiting the medical ventilation equipment from carrying out gas delivery in a preset time period according to a preset control mode, and controlling the medical ventilation equipment to ventilate according to a preset ventilation mode and/or outputting an abnormal prompt of the patient.
In the above aspect, the step of measuring the target gas concentration for a preset time period includes:
the measurement of the target gas concentration is started at a time spaced from the start time of the preset time period by a preset time interval.
In the above aspect, the step of measuring the target gas concentration for a preset time period includes:
and if the target gas concentration change rule measured in the preset time period is regular, stopping executing the step of inhibiting the medical ventilation equipment from carrying out gas delivery in the preset time period according to a preset control mode, and controlling the medical ventilation equipment to ventilate according to a preset ventilation mode.
In the foregoing aspect, when the step of suppressing gas delivery for the preset time period in accordance with the preset control manner is performed, the method further includes:
and if the stop instruction is received, stopping executing the step of inhibiting the medical ventilation equipment from carrying out gas delivery in a preset time period according to a preset control mode, and controlling the medical ventilation equipment to ventilate according to a preset ventilation mode.
In the foregoing aspect, after performing the step of inhibiting gas delivery by the medical ventilator for a preset period of time in a preset control manner, the method further includes:
and controlling the medical ventilation equipment to ventilate according to a preset ventilation mode.
In the above aspect, after performing the step of measuring the target gas concentration for the preset time period, the method further includes:
outputting the measured target gas concentration and/or waveform.
In the foregoing aspect, before performing the step of inhibiting gas delivery by the medical ventilator for a preset period of time in a preset control manner, the method further includes:
the patient is aerated.
In the above aspect, when the step of measuring the target gas concentration for a preset time period is performed, the method further includes:
and acquiring the current air supply flow rate.
In the above aspect, after performing the step of measuring the target gas concentration for the preset time period, the method further includes:
the measured target gas concentration is compensated for based on the current feed gas flow rate.
In the above aspect, when the step of measuring the target gas concentration for a preset time period is performed, the method further includes:
acquiring physiological sign parameters of a patient;
and judging whether the measured target gas concentration is abnormal or not according to the physiological sign data of the patient.
In the foregoing aspect, when performing the step of inhibiting gas delivery by the medical ventilator for a preset period of time in a preset control manner, the method further includes:
and outputting at least one of relevant parameters corresponding to a preset control mode, a preset time period, physiological sign parameters and/or waveforms of the patient acquired within the preset time period, and a preset threshold corresponding to the physiological sign parameters of the patient.
The embodiment of the invention provides a gas concentration measuring device, which comprises:
the control module is used for inhibiting the medical ventilation equipment from carrying out gas delivery within a preset time period according to a preset control mode in the ventilation process;
the measuring module is used for measuring the concentration of the target gas within a preset time period; wherein the target gas concentration is the concentration of any one gas component in the expired gas of the patient.
In the above apparatus, the preset control manner is to reduce the flow of the supplied air or to stop the supply of the air.
In the above apparatus, the step of inhibiting, by the control module, the gas delivery of the medical ventilator for the preset time period according to the preset control mode includes:
acquiring a preset inhibition period; and periodically inhibiting the gas delivery of the medical ventilator for a preset time period according to a preset inhibition period according to a preset control mode.
In the above apparatus, the step of inhibiting, by the control module, the gas delivery of the medical ventilator for the preset time period according to the preset control mode includes:
and receiving a trigger instruction, and inhibiting the medical ventilation equipment from carrying out gas delivery within a preset time period according to the trigger instruction in a preset control mode.
In the device, before the step of inhibiting the medical ventilation equipment from carrying out gas delivery in a preset time period according to a preset control mode is executed, the control module acquires physiological sign parameters of a patient; and if the physiological sign parameters of the patient indicate that the patient is in a steady state, the step of inhibiting the medical ventilator from carrying out gas delivery within a preset time period according to a preset control mode is executed.
In the device, when the step of inhibiting the medical ventilation equipment from carrying out gas delivery in a preset time period according to a preset control mode is executed by a control module, physiological sign parameters of a patient are obtained; and if the physiological sign parameters of the patient indicate that the patient is in an abnormal state, stopping the step of inhibiting the medical ventilation equipment from carrying out gas delivery in a preset time period according to a preset control mode, and controlling the medical ventilation equipment to ventilate according to a preset ventilation mode and/or outputting an abnormal prompt of the patient.
In the above apparatus, the measurement module starts measuring the target gas concentration at a time spaced apart from a start time of the preset time period by a preset time interval.
In the above apparatus, if the measurement module measures the target gas concentration change law within the preset time period, the control module stops inhibiting the medical ventilator from carrying out gas delivery, and controls the medical ventilator to ventilate according to the preset ventilation mode.
In the device, when the control module executes the step of inhibiting the gas delivery in the preset time period according to the preset control mode, if a stop instruction is received, the control module stops executing the step of inhibiting the gas delivery of the medical ventilation device in the preset time period according to the preset control mode, and controls the medical ventilation device to ventilate according to the preset ventilation mode.
In the above apparatus, the control module controls the medical ventilator to ventilate according to the preset ventilation mode after executing the step of inhibiting the medical ventilator from carrying out gas delivery for the preset time period according to the preset control mode.
In the above apparatus, the measurement module outputs the measured target gas concentration and/or waveform after performing the step of measuring the target gas concentration for a preset time period.
In the device, the control module performs oxygen-increasing ventilation on the patient before executing the step of inhibiting the medical ventilation equipment from performing gas delivery in a preset control mode within a preset time period.
In the above apparatus, the measurement module acquires the current supply flow rate when the step of measuring the target gas concentration within a preset time period is performed. .
In the above apparatus, the measurement module compensates the measured target gas concentration according to the current supply flow rate after performing the step of measuring the target gas concentration for the preset time period.
In the device, the measurement module also acquires physiological parameters of the patient when the step of measuring the concentration of the target gas within a preset time period is executed; and judging whether the measured target gas concentration is abnormal or not according to the physiological sign parameters of the patient.
The embodiment of the invention provides medical ventilation equipment comprising the gas concentration measuring device, which comprises a gas source, a breathing pipeline and a display, wherein the breathing pipeline is connected with the display;
a gas source providing gas during the venting;
the breathing pipeline is connected with an air source and provides a breathing path in the process of ventilation;
the gas concentration measuring device is connected with the breathing pipeline, the gas source and the display;
and a gas concentration measuring device for measuring the target gas concentration during the ventilation.
An embodiment of the present invention provides a computer-readable storage medium, where a gas concentration measurement program is stored in the computer-readable storage medium, and the gas concentration measurement program can be executed by a processor to implement the gas concentration measurement method.
Therefore, in the technical scheme of the embodiment of the invention, in the ventilation process, the gas delivery of the medical ventilation equipment is inhibited within the preset time period according to the preset control mode; measuring the concentration of the target gas within a preset time period; wherein the target gas concentration is the concentration of any one gas component in the expired gas of the patient. By the technical scheme of the embodiment of the invention, the concentration of the target gas in the expired gas of the patient can be accurately measured when the patient is ventilated.
Drawings
Fig. 1 is a schematic structural diagram of a gas concentration measuring apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a gas concentration measurement method according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating an embodiment of a medical ventilator configured to suppress airway pressure variations during ventilation;
FIG. 4 is a schematic diagram illustrating an embodiment of the present invention for inhibiting a change in an air flow rate during ventilation of a medical ventilation apparatus;
FIG. 5 is a schematic diagram illustrating a method of inhibiting carbon dioxide concentration changes during ventilation in a medical ventilator, according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a medical ventilator according to an embodiment of the present invention.
Detailed Description
So that the manner in which the features and aspects of the embodiments of the present invention can be understood in detail, a more particular description of the embodiments of the invention, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings.
The embodiment of the invention provides a gas concentration measuring method which is applied to medical ventilation equipment such as a breathing machine. It should be noted that, in the embodiment of the present invention, the gas concentration measurement method is performed by the gas concentration measurement apparatus. Fig. 1 is a schematic structural diagram of a gas concentration measurement apparatus according to an embodiment of the present invention. As shown in fig. 1, the gas concentration measuring apparatus includes: a control module 101 and a measurement module 102. The gas concentration measuring method of the present invention will be described in detail below based on the gas concentration measuring apparatus.
Fig. 2 is a schematic flow chart of a gas concentration measurement method according to an embodiment of the present invention. As shown in fig. 2, the gas concentration measuring method mainly includes the following steps:
s201, in the process of ventilation, the medical ventilation equipment is restrained from carrying out gas transmission in a preset time period according to a preset control mode.
In an embodiment of the present invention, the control module 101 in the gas concentration measurement apparatus may inhibit the gas delivery of the medical ventilator for a preset time period according to a preset control manner during the ventilation process of the medical ventilator.
In the embodiment of the present invention, the medical ventilator may be a ventilator, an anesthesia machine, or other medical device having a ventilation function, and the ventilation method of the medical ventilator may be any one of invasive ventilation, non-invasive ventilation, oxygen therapy, and nasal cannula oxygen inhalation, and specific examples of the medical ventilator and the ventilation method are not limited to the embodiment of the present invention.
In the embodiment of the present invention, the preset control manner is to reduce the air flow or stop the air supply. The specific preset control manner is not limited in the embodiments of the present invention.
It is understood that in the embodiment of the present invention, a preset time period is preset in other concentration measuring devices, and when the control module 101 suppresses gas delivery by the medical ventilator in such a manner that the flow of gas supply is reduced or stopped, the time for performing suppression is the preset time period. The specific preset time period is not limited in the embodiments of the present invention.
Illustratively, in an embodiment of the present invention, the preset control manner is to decrease the flow of the delivered gas for a preset time period a, and the control module 101 controls the medical ventilator to decrease the flow of the delivered gas for a duration a during ventilation so as to inhibit gas delivery by the medical ventilator.
Specifically, in the embodiment of the present invention, the step of the control module 101 inhibiting the gas delivery of the medical ventilator for the preset time period according to the preset control manner includes: acquiring a preset inhibition period; and periodically inhibiting the gas delivery of the medical ventilator for a preset time period according to a preset inhibition period according to a preset control mode.
It should be noted that, in the embodiment of the present invention, a preset suppression period is preset in the gas concentration measurement device to limit that the medical ventilator is repeatedly performed to suppress gas delivery at regular intervals, and the control module 101 may directly obtain the preset suppression period, where the specific preset suppression period is not limited in the embodiment of the present invention.
Illustratively, in the embodiment of the present invention, the preset control mode is to stop air supply, the preset time period is a, and the preset suppression period is T. After acquiring the preset suppression period T, the control module 101 controls the medical ventilator to stop air supply for a time a at intervals of T during invasive or non-invasive ventilation of the medical ventilator, thereby suppressing gas delivery by the medical ventilator.
Specifically, in an embodiment of the present invention, the step of the control module 101 inhibiting the gas delivery of the medical ventilator for a preset time period according to a preset control manner may further include: and receiving a trigger instruction, and inhibiting the medical ventilation equipment from carrying out gas delivery within a preset time period according to the trigger instruction in a preset control mode.
It can be understood that, in the embodiment of the present invention, a display interface and a key may be provided on the medical ventilator or the gas concentration monitoring device, and a medical worker may perform a touch operation on the display interface, or press a certain specific key, that is, send a start/end trigger instruction to the control module 101 of the gas concentration measuring device, and the control module 101 receives the trigger instruction, that is, may inhibit the medical ventilator from performing gas delivery within a preset time period between the reception of the start/end trigger instruction according to a preset control manner.
In an embodiment of the present invention, before the step of inhibiting the medical ventilator from performing gas delivery within a preset time period according to a preset control manner is performed by the control module 101, physiological parameters of the patient may also be obtained; and if the physiological sign parameters of the patient indicate that the patient is in a stable state, the step of inhibiting the medical ventilation equipment from carrying out gas delivery within a preset time period according to a preset control mode is executed.
It is understood that, in the embodiment of the present invention, the control module 101 inhibits the medical ventilator from delivering gas, which has a certain effect on the patient to be ventilated by the medical ventilator, so that the control module 101 may first obtain the physiological parameters of the patient to determine whether it is currently suitable for inhibiting the medical ventilator from delivering gas, and avoid inhibiting the medical ventilator from delivering gas in the case of a bad patient condition, aggravating the patient's condition, or causing a dangerous condition to the patient.
It should be noted that, in the embodiment of the present invention, the patient physiological parameters include at least one of the following parameters: heart rate, blood oxygen, pulse, respiration rate, peak pressure, mean pressure, blood pressure, tidal volume, and body temperature, although other parameters that may reflect the patient's condition may be included. Specific patient physiological parameters the embodiments of the present invention are not limited.
It should be noted that, in the embodiment of the present invention, the control module 101 may directly obtain the physiological sign data of the patient collected by the relevant device or equipment, for example, the control module may be attached to the body of the patient through an electrode, extract the electrocardiographic signal of the patient, and provide the electrocardiographic signal to the control module 101, and the specific method for obtaining the physiological sign parameter of the patient is not limited in the embodiment of the present invention.
In the embodiment of the present invention, when the step of inhibiting the medical ventilator from performing gas delivery within the preset time period according to the preset control manner is executed, the control module 101 may also obtain the physiological sign parameter of the patient, and if the physiological sign parameter of the patient indicates that the patient is in an abnormal state, the step of inhibiting the medical ventilator from performing gas delivery within the preset time period according to the preset control manner is stopped, and the medical ventilator is controlled to perform ventilation according to the preset ventilation mode and/or output an abnormal patient prompt.
It is appreciated that in embodiments of the present invention, the control module 101 obtains the patient physiological parameters when inhibiting the gas delivery of the medical ventilator to determine whether the patient is uncomfortable or abnormal, and if the patient is uncomfortable or abnormal, the control module may stop the current inhibition control and/or prompt of the medical ventilator in time to avoid aggravating the condition of the patient or to cause a dangerous condition to the patient.
It should be noted that, in the embodiment of the present invention, the control module 101 may determine whether the physiological parameters of the patient represent that the patient is in a steady state or an abnormal state according to a preset manner.
Specifically, in the embodiment of the present invention, the control module 101 may store a related threshold of the physiological parameter of the patient in advance, for example, a maximum threshold and a minimum threshold, if the physiological 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 steady state, and if the physiological 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, where the specific maximum threshold and the specific minimum threshold may be set by the user autonomously according to actual needs or determined by internal calculation of the control module 101.
Specifically, in the embodiment of the present invention, the control module 101 may further calculate a change rate of the physiological parameters of the patient, compare a pre-stored change rate threshold, determine that the patient is in a stable state if the change rate of the physiological parameters of the patient is less than or equal to a preset change rate threshold, determine that the patient is in an abnormal state if the change rate of the physiological parameters of the patient is greater than the change rate threshold, and determine the specific change rate threshold by the user according to the actual requirement or by internal calculation of the control module 101.
Specifically, in the embodiment of the present invention, the control module 101 may also determine whether the patient is in the steady state or the abnormal state according to the physiological parameters of the patient and the change rate of the physiological parameters of the patient, that is, if the physiological parameters of the patient are greater than the maximum threshold or less than the minimum threshold and the change rate of the physiological parameters of the patient is greater than the change rate threshold, the patient is determined to be in the abnormal state, and the patient is determined to be in the steady state in other cases. The specific maximum threshold, minimum threshold, and rate of change threshold may be set autonomously by the user based on actual demand or determined by internal calculations by the control module 101.
In the embodiment of the present invention, the control module 101 controls the medical ventilator to ventilate according to the preset ventilation mode, where the preset ventilation mode may be a ventilation mode before the medical ventilator inhibits gas delivery, or another ventilation mode different from the ventilation mode before the medical ventilator inhibits gas delivery, and the specific preset ventilation mode is not limited in the embodiment of the present invention.
It should be noted that, in the embodiment of the present invention, the control module 101 may output the abnormal patient prompt to a display configured for the medical ventilator, and certainly, the gas concentration measuring device itself may also be configured with an independent display module, and the control module 101 outputs the abnormal patient prompt to the display module, so that after seeing the abnormal patient prompt, the medical staff can perform corresponding treatment in time, and the occurrence of an accident situation on the patient is avoided.
In the embodiment of the present invention, when the step of inhibiting gas delivery in the preset control manner within the preset time period is executed, if a stop instruction is received, the control module 101 stops executing the step of inhibiting gas delivery in the preset control manner by the medical ventilator within the preset time period, and controls the medical ventilator to ventilate in the preset ventilation mode. Of course, the ventilation in accordance with the preset ventilation pattern may also be a ventilation pattern before resuming the gas concentration measurement.
It is understood that, in the embodiment of the present invention, the healthcare operator may also send a stop instruction to the control module 101 through a display interface and corresponding specific keys provided on the medical ventilator or the gas concentration measurement device, so as to stop inhibiting the medical ventilator from performing gas delivery at any time within a preset time period, and control the medical ventilator to perform ventilation according to a preset ventilation mode.
In an embodiment of the present invention, the control module 101 controls the medical ventilator to ventilate in a preset ventilation mode after performing the step of inhibiting the medical ventilator from gas delivery for a preset period of time in a preset control manner.
It is understood that, in the embodiment of the present invention, if the control module 101 does not receive the stop instruction within the preset time period, or the acquired physiological parameters of the patient indicate that the patient is in the normal state, the control module 101 will inhibit the gas delivery of the medical ventilator according to the preset control manner within the preset time period until the preset time period is over, and then control the medical ventilator to ventilate according to the preset ventilation mode.
In an embodiment of the present invention, before performing the step of inhibiting the gas delivery of the medical ventilator for the preset time period according to the preset control manner, the control module 101 may further perform oxygen-enhanced ventilation during the non-invasive or invasive ventilation according to the preset oxygen concentration. Of course, the preset oxygen concentration for executing the oxygen increasing ventilation may be input by a doctor or stored in advance, or may be calculated according to physiological parameters of the patient, the state of the patient, the age of the patient, the ventilation parameters, the preset time period for performing the ventilation inhibition, and the like.
It will be appreciated that in embodiments of the present invention, where control module 101 inhibits delivery of gas by a medical ventilator, a patient being ventilated using the medical ventilator will be starved for a predetermined amount of oxygen, and therefore, prior to inhibition, control module 101 performs oxygen-enhanced ventilation based on the predetermined oxygen concentration to reduce hypoxia of the patient while the delivery of gas is inhibited.
It should be noted that, in the embodiment of the present invention, when the control module 101 executes the step of inhibiting the medical ventilator from delivering gas within the preset time period according to the preset control manner, at least one of the relevant parameters corresponding to the preset control manner, the preset time period, the physiological parameters and/or waveforms of the patient acquired within the preset time period, and the preset threshold corresponding to the physiological parameters of the patient may be output, and the medical care operator may view these data in real time, so as to perform corresponding operations according to actual requirements.
S202, measuring the concentration of target gas in a preset time period; wherein the target gas concentration is the concentration of any one gas component in the expired gas of the patient.
In an embodiment of the present invention, the control module 101 of the gas concentration measurement device inhibits the medical ventilator from delivering gas for a preset period of time in a preset control manner, and the measurement module 102 measures the target gas concentration for the preset period of time.
It should be noted that, in the embodiment of the present invention, the target gas concentration is the concentration of any one of the gas components in the exhaled air of the patient, for example, carbon dioxide, oxygen, and the like.
It is appreciated that in embodiments of the present invention, measurement module 102 measures the target gas concentration when the medical ventilator is inhibited from delivering gas for a predetermined period of time, which may reduce the dilution of the patient's exhaled gas by the fresh gas delivered by the patient segment, thereby accurately measuring the concentration of the target gas in the patient's exhaled gas.
Fig. 3 is a first schematic diagram illustrating a method for suppressing a change in airway pressure during ventilation performed by a medical ventilation apparatus according to an embodiment of the present invention. As shown in fig. 3, when the control module 101 inhibits the medical ventilator from delivering gas by reducing the flow of delivered gas or stopping the delivery of gas, the airway pressure will decrease rapidly from time t1, and when ventilation is performed according to the preset ventilation mode at time t2, that is, the end of the preset time period, the airway pressure will increase rapidly. Fig. 4 is a schematic diagram illustrating a method for suppressing a change in an air flow rate during ventilation performed by a medical ventilation apparatus according to an embodiment of the present invention. As shown in fig. 4, when the control module 101 suppresses the gas delivery by the medical ventilator so as to reduce the flow rate of the delivered gas or stop the gas delivery, the flow rate of the delivered gas rapidly decreases. Fig. 5 is a schematic diagram illustrating a method for suppressing a change in carbon dioxide concentration during ventilation of a medical ventilator according to an embodiment of the present invention. As shown in fig. 4, during the preset time period when the control module 101 inhibits gas delivery by the medical ventilator by reducing the flow of delivered gas or stopping the delivery of gas, i.e., between time t1 and time t2, the measured carbon dioxide concentration value by the measurement module 102 is significantly higher than the measured values at other times, and it is because gas delivery by the medical ventilator is inhibited in step S201, an accurate carbon dioxide concentration value is measured.
In an embodiment of the present invention, the step of the measurement module 102 measuring the target gas concentration for the preset time period includes: the measurement of the target gas concentration is started at a time spaced from the start time of the preset time period by a preset time interval.
In order to measure a more accurate target gas concentration, it is also possible to start measuring the target gas concentration after inhibiting gas delivery for a certain period of time, i.e., after a certain period of time from the start time of the preset period of time. Of course, measurement module 102 may also begin measuring the target gas concentration as soon as control module 102 begins to inhibit gas delivery by the medical ventilator. The specific preset time interval is not limited in the embodiments of the present invention.
For example, in the embodiment of the present invention, the preset control manner is to decrease the flow of the delivered gas, the preset time period is a, the preset time interval is B, and the control module 101 controls the medical ventilation apparatus to decrease the flow of the delivered gas for a duration a during the ventilation process, specifically, after the decrease of the flow of the delivered gas is started, the measurement module 102 starts to measure the target gas concentration after the duration B.
In an embodiment of the present invention, the step of the measurement module 102 measuring the target gas concentration for the preset time period includes: and if the target gas concentration change rule measured in the preset time period is regular, stopping executing the step of inhibiting the medical ventilation equipment from carrying out gas delivery in the preset time period according to a preset control mode, and controlling the medical ventilation equipment to ventilate according to a preset ventilation mode.
It can be understood that, in the embodiment of the present invention, the measurement module 102 may measure the target gas concentration all the time within a preset time period, so that the change condition of the target gas concentration may be determined in real time, and if the change rule is determined, the measurement is stable, and the measured target gas concentration is accurate. As shown in fig. 5, between time t1 and time t2, the measured end-tidal carbon dioxide concentration changes irregularly at the beginning, and the measured concentration changes regularly at the two subsequent times, i.e., the measured value tends to stabilize. Therefore, even when the preset time period end time is not reached, the measurement module 102 may end the measurement, and the control module 101 may directly stop the step of suppressing the gas delivery, and return to the original ventilation mode as soon as possible, or perform normal ventilation in another ventilation mode.
It should be noted that, in the embodiment of the present invention, the measurement module 102 may further output the target gas concentration and/or the waveform after performing the step of measuring the target gas concentration within the preset time period. Medical personnel can perform relevant medical diagnosis by looking at the target gas concentration and/or waveform. Specific output forms embodiments of the present invention are not limited.
In an embodiment of the present invention, when the measuring module 102 performs the step of measuring the target gas concentration within the preset time period, the following steps may be further performed: and acquiring the current air supply flow rate.
In the embodiment of the present invention, the control module 101 may reduce the flow rate of the delivered gas or directly control the flow rate of the delivered gas to be 0, so as to inhibit the medical ventilator from delivering the gas, that is, the measurement module 102 may directly measure the current flow rate of the delivered gas when the medical ventilator delivers the gas. In addition, the measurement module 102 may also measure ventilation parameters of the medical ventilation apparatus during gas delivery, such as patient end pressure, machine end pressure, leakage amount, and the like, and calculate the current air supply flow rate through the ventilation parameters, that is, indirectly obtain the current air supply flow rate. The present invention is not limited to the specific manner of obtaining the current flow rate of the delivered air.
In the embodiment of the present invention, the measurement module 102 obtains the current flow rate of the delivered gas, and therefore, after the step of measuring the target gas concentration within the preset time period is performed, the following steps may be further performed: the measured target gas concentration is compensated for based on the current feed gas flow rate.
It should be noted that, in the embodiment of the present invention, a concentration compensation formula may be determined in advance according to actual requirements, and the measured target gas concentration may be compensated by substituting the current gas supply flow rate and the measured target gas concentration into the concentration compensation formula, so as to obtain a compensated target gas concentration, where the compensated target gas concentration is the true target gas concentration. The specific concentration compensation formula is not limited in the embodiments of the present invention.
For example, in an embodiment of the present invention, where the end-tidal carbon dioxide concentration is measured, the concentration compensation formula may be predetermined as:
EtCO 2(0)＝f(EtCO 2(n)，Flow(n)) (1)
wherein EtCO2(0) For compensated end-tidal carbon dioxide concentration, EtCO2(n) is the measured end-tidal carbon dioxide concentration, and flow (n) is the current feed flow rate.
It should be noted that, in the embodiment of the present invention, the specific formula (1) may be specifically determined according to actual requirements, and the following illustrates a method for determining the concentration compensation formula.
Illustratively, in the embodiment of the present invention, the ventilation flow rate and the measured end-tidal carbon dioxide concentration are inversely related, and assuming that the two are linear, it can be assumed that the concentration compensation formula is specifically:
EtCO 2(n)＝EtCO 2(0)-b×Flow(n) (2)
wherein b is a compensation coefficient, and the end-tidal carbon dioxide concentration under different air supply flow rates can be measured and substituted into the formula (2) to determine the value of b.
Illustratively, in embodiments of the invention, the end-tidal carbon dioxide concentration, EtCO, is measured to a delivery gas flow rate of 5LPM2(5) And the end-tidal carbon dioxide concentration EtCO was measured at a delivery flow rate of 10LPM2(10) Substituting into equation (2), the following equation is obtained:
EtCO 2(5)＝EtCO 2(0)-b×5 (3)
EtCO 2(10)＝EtCO 2(0)-b×10 (4)
by combining the formula (3) and the formula (4), b can be determined as follows:
b＝(EtCO 2(5)-EtCO 2(10))/5 (5)
and (3) substituting the determined specific value of b into the formula (2) to obtain the determined concentration compensation formula.
Illustratively, in one embodiment, the delivered gas flow rate and the measured end-tidal carbon dioxide concentration are inversely related, assuming that the two are in reciprocal relation, the concentration compensation equation may be assumed to be specifically:
EtCO 2(n)＝EtCO 2(0)/(1+b×Flow(n)) (6)
where b is a compensation factor, the end-tidal carbon dioxide concentration at different flow rates of the delivered gas can be measured and substituted into equation (6) to determine the value of b.
Illustratively, in another embodiment, the end-tidal carbon dioxide concentration, EtCO, is measured to a delivery gas flow rate of 5LPM2(5) And the end-tidal carbon dioxide concentration EtCO was measured at a delivery flow rate of 10LPM2(10) Substituting equation (6), the following equation is obtained:
EtCO 2(5)＝EtCO 2(0)/(1+b×5) (7)
EtCO 2(10)＝EtCO 2(0)/(1+b×10) (8)
by combining equation (7) and equation (8), b can be determined as follows:
b＝(EtCO 2(5)-EtCO 2(10))/(10×EtCO 2(10)-5×EtCO 2(5)) (9)
and (4) substituting the determined specific value of b into the formula (6) to obtain the determined concentration compensation formula.
It can be understood that, in the embodiment of the present invention, after the compensation parameter b is determined by the two concentration compensation formulas illustrated above, in the actual measurement process, the actually measured end-tidal carbon dioxide concentration and the obtained current air supply flow rate at the time of measuring the end-tidal carbon dioxide concentration may be substituted to calculate the compensated end-tidal carbon dioxide concentration.
It should be noted that, in the embodiment of the present invention, when the measurement module 102 performs the step of measuring the target gas concentration within the preset time period, the following steps may also be performed: acquiring physiological sign parameters of a patient; and judging whether the measured target gas concentration is abnormal or not according to the physiological sign data of the patient.
It is understood that, in the embodiment of the present invention, when the measurement module 102 performs the step of measuring the target gas concentration within the preset time period, the patient may loose the nose mask, cry or cough, which will affect the measurement, for example, when the physiological parameters of the patient fluctuate, for example, when the patient cry, the heartbeat is accelerated, and the measured target gas concentration is abnormal, i.e., inaccurate. The specific manner of determining whether the target gas concentration is abnormal is not limited in the embodiments of the present invention.
The embodiment of the invention provides a gas concentration measuring method, which is applied to medical ventilation equipment, and in the ventilation process, the medical ventilation equipment is inhibited from carrying out gas transmission within a preset time period according to a preset control mode; measuring the concentration of the target gas within a preset time period; wherein the target gas concentration is the concentration of any one gas component in the expired gas of the patient. That is to say, the technical scheme of the embodiment of the invention can accurately measure the concentration of the target gas in the expired gas of the patient when the patient is ventilated.
Another embodiment of the present invention provides a gas concentration measuring apparatus. As shown in fig. 1, the apparatus includes:
the control module 101 is used for inhibiting the medical ventilation equipment from carrying out gas delivery within a preset time period according to a preset control mode in the ventilation process;
a measurement module 102, which measures a target gas concentration within a preset time period; wherein the target gas concentration is the concentration of any one gas component in the expired gas of the patient.
Optionally, the preset control mode is to reduce the air flow or stop air supply.
Optionally, the step of the control module 101 inhibiting the medical ventilator from performing gas delivery within a preset time period according to a preset control manner includes:
acquiring a preset inhibition period; and periodically inhibiting the gas delivery of the medical ventilator for a preset time period according to a preset inhibition period according to a preset control mode.
Optionally, the step of inhibiting, by the control module 102, the gas delivery of the medical ventilator within the preset time period according to the preset control manner includes:
and receiving a trigger instruction, and inhibiting the medical ventilation equipment from carrying out gas delivery within a preset time period according to the trigger instruction in a preset control mode.
Optionally, before the step of inhibiting the medical ventilator from performing gas delivery within a preset time period according to a preset control manner is performed by the control module 101, the physiological parameters of the patient are obtained; and if the physiological sign parameters of the patient indicate that the patient is in a steady state, the step of inhibiting the medical ventilator from carrying out gas delivery within a preset time period according to a preset control mode is carried out.
Optionally, when the step of inhibiting the medical ventilator from performing gas delivery within a preset time period according to a preset control manner is executed by the control module 101, the physiological parameters of the patient are obtained; and if the physiological sign parameters of the patient indicate that the patient is in an abnormal state, stopping the step of inhibiting the medical ventilation equipment from carrying out gas delivery in a preset time period according to a preset control mode, and controlling the medical ventilation equipment to ventilate according to a preset ventilation mode and/or outputting an abnormal prompt of the patient.
Optionally, the measurement module 102 starts to measure the target gas concentration at a time spaced from the start time of the preset time period by a preset time interval.
Optionally, if the measurement module 102 measures the target gas concentration change rule within a preset time period, the control module stops inhibiting the medical ventilator from performing gas delivery, and controls the medical ventilator to ventilate according to a preset ventilation mode.
Optionally, when the step of inhibiting gas delivery in the preset time period according to the preset control manner is executed by the control module 101, if a stop instruction is received, the step of inhibiting gas delivery by the medical ventilator in the preset time period according to the preset control manner is stopped, and the medical ventilator is controlled to ventilate according to the preset ventilation mode.
Optionally, after the step of inhibiting the medical ventilator from performing gas delivery for the preset time period according to the preset control manner is performed, the control module 101 controls the medical ventilator to perform ventilation according to the preset ventilation mode.
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 a preset time period.
Optionally, the control module 101 performs oxygen-enhanced ventilation on the patient before performing the step of inhibiting the medical ventilator from performing gas delivery within a preset time period according to a preset control manner.
Optionally, the measurement module 102 obtains the current flow rate of the delivered gas when the step of measuring the target gas concentration within the preset time period is performed.
Optionally, the measurement module 102 compensates the measured target gas concentration according to the current flow rate after performing the step of measuring the target gas concentration within the preset time period.
Optionally, the measurement module 102 further obtains physiological parameters of the patient when performing the step of measuring the target gas concentration within the preset time period; and judging whether the measured target gas concentration is abnormal or not according to the physiological sign parameters of the patient.
The embodiment of the invention provides a gas concentration measuring device, which is used for inhibiting a medical ventilation device from carrying out gas transmission within a preset time period according to a preset control mode in the ventilation process; measuring the concentration of the target gas within a preset time period; wherein the target gas concentration is the concentration of any one gas component in the expired gas of the patient. That is to say, the gas concentration measuring device provided by the embodiment of the invention can accurately measure the target gas concentration in the expired gas of the patient when the patient is ventilated.
The embodiment of the invention also provides the medical ventilation equipment. Fig. 6 is a schematic structural diagram of a medical ventilator according to an embodiment of the present invention. As shown in fig. 6, the medical ventilator includes the gas concentration measuring device 601, and further includes: a gas source 602, a breathing circuit 603, and a display 604;
a gas source 602 that provides gas during ventilation;
the breathing circuit 603 is connected to a gas source 602 to provide a breathing path during ventilation;
the gas concentration measuring device 601 is connected with a breathing pipeline 603, a gas source 602 and a display 604;
the gas concentration measuring device 601 measures the target gas concentration during the ventilation.
For a respirator, especially a neonatal respirator, the gas concentration measurement method or the gas concentration measurement device provided by the embodiment is adopted, and gas delivery is inhibited within a preset time period, so that the precision of gas concentration measurement can be improved.
An embodiment of the present invention provides a computer-readable storage medium storing a gas concentration measurement program that can be executed by a processor to implement the above-described gas concentration measurement method. The computer-readable storage medium may be a volatile Memory (volatile Memory), such as a Random-Access Memory (RAM); or a non-volatile Memory (non-volatile Memory), such as a Read-Only Memory (ROM), a flash Memory (flash Memory), a Hard Disk (Hard Disk Drive, HDD) or a Solid-State Drive (SSD); or may be a respective device, such as a mobile phone, computer, tablet device, personal digital assistant, etc., that includes one or any combination of the above-mentioned memories.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable signal processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable signal processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable signal processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable signal processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Industrial applicability
According to the technical scheme of the embodiment of the invention, in the ventilation process, the medical ventilation equipment is inhibited from carrying out gas delivery within a preset time period according to a preset control mode; measuring the concentration of the target gas within a preset time period; wherein the target gas concentration is the concentration of any one gas component in the expired gas of the patient. That is to say, the gas concentration measuring device provided by the embodiment of the invention can accurately measure the target gas concentration in the expired gas of the patient when the patient is ventilated.

Claims (34)

  1. A method of measuring gas concentration for use with a medical ventilator, the method comprising:
    during the ventilation process, inhibiting the medical ventilation equipment from carrying out gas delivery within a preset time period according to a preset control mode;
    measuring the concentration of the target gas within the preset time period; wherein the target gas concentration is the concentration of any one gas component in the gas exhaled by the patient.
  2. The method of claim 1, wherein the predetermined control is reducing the flow of the delivered air or stopping the delivery of air.
  3. The method of claim 1, wherein the step of inhibiting gas delivery by the medical ventilator for a preset period of time in a preset controlled manner comprises:
    acquiring a preset inhibition period;
    and periodically inhibiting the medical ventilation equipment from carrying out gas delivery within the preset time period according to the preset inhibition period and the preset control mode.
  4. The method of claim 1, wherein the step of inhibiting gas delivery by the medical ventilator for a preset period of time in a preset controlled manner comprises:
    and receiving a trigger instruction, and inhibiting the medical ventilation equipment from carrying out gas delivery within the preset time period according to the trigger instruction and the preset control mode.
  5. The method of claim 1, wherein prior to performing the step of inhibiting gas delivery by the medical ventilator for a preset period of time in a preset controlled manner, the method further comprises:
    acquiring physiological sign parameters of a patient;
    and if the physiological sign parameters of the patient indicate that the patient is in a steady state, the step of inhibiting the medical ventilation device from carrying out gas delivery within a preset time period according to a preset control mode is executed.
  6. The method of claim 1, wherein in performing the step of inhibiting gas delivery by the medical ventilator for a preset period of time in a preset controlled manner, the method further comprises:
    acquiring physiological sign parameters of a patient;
    and if the physiological sign parameters of the patient indicate that the patient is in an abnormal state, stopping executing the step of inhibiting the medical ventilation equipment from carrying out gas delivery in a preset time period according to a preset control mode, and controlling the medical ventilation equipment to ventilate according to a preset ventilation mode and/or outputting abnormal patient prompts.
  7. The method of claim 1, wherein the step of measuring the target gas concentration for the preset time period comprises:
    and starting to measure the target gas concentration at a time which is a preset time interval from the starting time of the preset time period.
  8. The method of claim 1, wherein the step of measuring the target gas concentration for the preset time period comprises:
    and if the target gas concentration change rule measured in the preset time period is correct, stopping executing the step of inhibiting the medical ventilation equipment from carrying out gas delivery in the preset time period according to a preset control mode, and controlling the medical ventilation equipment to ventilate according to a preset ventilation mode.
  9. The method of claim 1, wherein in performing the step of inhibiting gas delivery in a preset control manner for a preset period of time, the method further comprises:
    and if a stop instruction is received, stopping executing the step of inhibiting the medical ventilation device from carrying out gas delivery in a preset time period according to a preset control mode, and controlling the medical ventilation device to ventilate according to a preset ventilation mode.
  10. The method of claim 1, wherein after performing the step of inhibiting gas delivery by the medical ventilator for a preset period of time in a preset controlled manner, the method further comprises:
    and controlling the medical ventilation equipment to ventilate according to a preset ventilation mode.
  11. The method of claim 1, wherein after performing the step of measuring the target gas concentration for the preset time period, the method further comprises:
    outputting the measured target gas concentration and/or waveform.
  12. The method of claim 1, wherein prior to performing the step of inhibiting gas delivery by the medical ventilator for a preset period of time in a preset controlled manner, the method further comprises:
    the patient is aerated.
  13. The method of claim 1, wherein in performing the step of measuring the target gas concentration for the preset time period, the method further comprises:
    and acquiring the current air supply flow rate.
  14. The method of claim 13, wherein after performing the step of measuring the target gas concentration for the preset time period, the method further comprises:
    and compensating the measured target gas concentration according to the current air supply flow rate.
  15. The method of claim 1, wherein in performing the step of measuring the target gas concentration for the preset time period, the method further comprises:
    acquiring physiological sign parameters of a patient;
    and judging whether the measured target gas concentration is abnormal or not according to the physiological sign data of the patient.
  16. The method of claim 1, wherein in performing the step of inhibiting gas delivery by the medical ventilator for a preset period of time in a preset controlled manner, the method further comprises:
    and outputting at least one of the relevant parameters corresponding to the preset control mode, the preset time period, the physiological sign parameters and/or waveforms of the patient acquired within the preset time period, and the preset threshold corresponding to the physiological sign parameters of the patient.
  17. A gas concentration measuring device for use in a medical ventilator, the device comprising:
    the control module is used for inhibiting the medical ventilation equipment from carrying out gas delivery within a preset time period according to a preset control mode in the ventilation process;
    the measuring module is used for measuring the concentration of the target gas in the preset time period; wherein the target gas concentration is the concentration of any one gas component in the gas exhaled by the patient.
  18. The apparatus of claim 17, wherein the predetermined control is to reduce the flow of the supplied air or to stop the supply of the air.
  19. The apparatus of claim 17, wherein the step of the control module inhibiting gas delivery by the medical ventilator for a preset period of time in a preset control manner comprises:
    acquiring a preset inhibition period; and periodically inhibiting the medical ventilation equipment from carrying out gas delivery within the preset time period according to the preset inhibition period and the preset control mode.
  20. The apparatus of claim 17, wherein the step of the control module inhibiting gas delivery by the medical ventilator for a preset period of time in a preset control manner comprises:
    and receiving a trigger instruction, and inhibiting the medical ventilation equipment from carrying out gas delivery within the preset time period according to the trigger instruction and the preset control mode.
  21. The apparatus of claim 17,
    the control module acquires physiological sign parameters of the patient before executing the step of inhibiting the medical ventilation equipment from carrying out gas delivery within a preset time period according to a preset control mode; and if the physiological sign parameters of the patient indicate that the patient is in a steady state, the step of inhibiting the medical ventilation device from carrying out gas delivery within a preset time period according to a preset control mode is executed.
  22. The apparatus of claim 17,
    the control module acquires physiological sign parameters of a patient when executing the step of inhibiting the medical ventilation equipment from carrying out gas delivery within a preset time period according to a preset control mode; and if the physiological sign parameters of the patient indicate that the patient is in an abnormal state, stopping the step of inhibiting the medical ventilation equipment from carrying out gas delivery in a preset time period according to a preset control mode, and controlling the medical ventilation equipment to ventilate according to a preset ventilation mode and/or outputting an abnormal prompt of the patient.
  23. The apparatus of claim 17,
    and the measuring module starts to measure the concentration of the target gas at the moment when the interval with the starting moment of the preset time period is a preset time interval.
  24. The apparatus of claim 17,
    and if the target gas concentration change rule measured by the measuring module in the preset time period is correct, the control module stops inhibiting the medical ventilation equipment from carrying out gas delivery and controls the medical ventilation equipment to ventilate according to a preset ventilation mode.
  25. The apparatus according to claim 17, wherein the control module, when executing the step of inhibiting gas delivery in the preset control manner for the preset time period, if receiving a stop instruction, stops executing the step of inhibiting gas delivery in the preset control manner for the preset time period, and controls the medical ventilator to ventilate in a preset ventilation mode.
  26. The apparatus of claim 17,
    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 carrying out gas delivery within a preset time period according to a preset control mode.
  27. The apparatus of claim 17,
    the measurement module outputs the measured target gas concentration and/or waveform after performing the step of measuring the target gas concentration within the preset time period.
  28. The apparatus of claim 17,
    and the control module performs oxygen increasing ventilation on the patient before executing the step of inhibiting the medical ventilation equipment from performing gas delivery within a preset time period according to a preset control mode.
  29. The apparatus of claim 17,
    and the measuring module acquires the current air supply flow rate when the step of measuring the concentration of the target gas in the preset time period is executed.
  30. The apparatus of claim 29,
    and the measuring module compensates the measured target gas concentration according to the current air supply flow rate after the step of measuring the target gas concentration in the preset time period is executed.
  31. The apparatus of claim 17,
    the measurement module also acquires physiological sign parameters of the patient when the step of measuring the concentration of the target gas within the preset time period is executed; and judging whether the measured target gas concentration is abnormal or not according to the physiological sign parameters of the patient.
  32. A medical ventilator comprising a gas concentration measuring device according to any of claims 17 to 31, comprising a gas source, a breathing circuit and a display;
    the gas source provides gas in the process of ventilation;
    the breathing circuit is connected with the air source and provides a breathing path during the 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 measurement device measures a target gas concentration during the invasive or non-invasive ventilation.
  33. The medical ventilator of claim 32 wherein the medical ventilator is a neonatal ventilator.
  34. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a gas concentration measurement program that can be executed by a processor to implement the gas concentration measurement method according to any one of claims 1 to 16.
CN201980093591.2A 2019-06-28 2019-06-28 Gas concentration measuring method and device, medical ventilation equipment and storage medium Pending CN113874061A (en)

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WO2005035021A2 (en) * 2003-10-07 2005-04-21 Noble Linda J A nasal gas delivery system and method for use thereof
CN101961523A (en) * 2004-08-31 2011-02-02 伊西康内外科公司 Occlusion rim, intubation member and occlusion rim member
US20140276169A1 (en) * 2013-03-15 2014-09-18 Salter Labs Method and system with divided cannula having low oxygen flow rate and improved end-tidal co2 measurement
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