WO2023097553A1

WO2023097553A1 - Ventilation device and extension module thereof, and pressure monitoring method

Info

Publication number: WO2023097553A1
Application number: PCT/CN2021/134761
Authority: WO
Inventors: 刘京雷; 邹心茹; 周小勇
Original assignee: 深圳迈瑞生物医疗电子股份有限公司
Priority date: 2021-12-01
Filing date: 2021-12-01
Publication date: 2023-06-08
Also published as: CN117651580A

Abstract

A ventilation device and an extension module thereof, and a pressure monitoring method. The pressure monitoring method comprises: acquiring a first site pressure value, which is collected by a ventilation device in a simulated airway state, of a ventilation object during a breathing process; determining a baseline value of the first site pressure value on the basis of the first site pressure value, which is acquired in a simulated airway open state; and then performing displaying or correcting a real-time first site pressure value.

Description

Ventilation equipment, expansion module thereof, and pressure monitoring method

technical field

The invention relates to a ventilator, a pressure monitoring method of the ventilator, and an expansion module of the ventilator.

Background technique

Clinically, auxiliary pressure monitoring during mechanical ventilation is increasingly accepted by clinicians. General auxiliary pressure is mainly used to monitor esophageal pressure and intragastric pressure. For example, esophageal pressure is used clinically to approximate intrathoracic pressure, and transpulmonary pressure is monitored based on esophageal pressure—the transpulmonary pressure is obtained by subtracting esophageal pressure from airway pressure.

Generally, the esophageal pressure is measured by inserting the manometric tube into the esophagus, but the manometric tube may be squeezed by the esophageal wall in the esophagus, causing the baseline of esophageal pressure to be inconsistent with the real baseline of chest cavity pressure, so that the esophageal pressure cannot be approximated Characterize the real thoracic pressure, which in turn leads to deviations in the calculation of transpulmonary pressure, which affects clinical applications. For example, when the risk of lung injury is assessed by end-inspiratory transpulmonary pressure, the baseline esophageal pressure will lead to deviations in transpulmonary pressure, which will affect the assessment results. Generally, during mechanical ventilation, the end-expiratory transpulmonary pressure is required to be greater than zero to prevent alveolar collapse. The problem of the baseline esophageal pressure will also lead to the inaccurate assessment of the end-expiratory transpulmonary pressure.

Therefore, this is a problem that needs to be solved.

technical problem

In order to solve the above problems, the present invention mainly provides a ventilation device, a pressure monitoring method of the ventilation device, and an expansion module of the ventilation device, which will be described in detail below.

technical solution

According to a first aspect, an embodiment provides a ventilation device, comprising:

a breathing assistance device configured to communicate with a ventilation circuit for providing mechanical ventilation to a subject to be ventilated through the ventilation circuit;

The valve provided on the ventilation pipeline or the breathing assistance device, through the opening or closing of the valve, the airway opening state of the ventilated subject can be simulated;

The first pressure sensor is used to collect the pressure value of the preset point during the breathing process of the ventilated subject;

Processor, where:

The processor is configured to obtain the pressure value of a preset point collected in real time by the first pressure sensor;

The processor is further configured to obtain a baseline value of the preset point pressure value according to the preset point pressure value;

Wherein, the baseline value of the pressure value at the preset point is the value collected by the first pressure sensor when the simulated airway opening state is obtained after the branch of the ventilation pipeline is opened or closed by the valve. Preset point pressure value.

In one embodiment, the processor is further configured to:

Correcting the pressure value of the preset point collected by the first pressure sensor according to the baseline value.

In one embodiment:

The processor subtracts the baseline value from the real-time collected pressure value at a preset point for correction.

In one embodiment, the ventilation device further includes a display, and the processor is also used for:

controlling to display on said display at least one of:

the baseline value of the preset point pressure value;

A corrected pressure value obtained after correcting the real-time collected preset pressure value according to the baseline value;

The initial curve of the pressure value of the preset point before correction versus time;

A correction curve of pressure values at preset points over time obtained by correcting the initial curve according to the baseline value.

In one embodiment:

The baseline value of the preset point pressure value is displayed in a display manner different from the preset point pressure value collected in real time.

In one embodiment, the valve is controlled to be opened or closed by the processor to simulate the airway state of the ventilated subject; the simulated airway state includes a simulated airway open state.

In one embodiment, the valve includes at least one of a safety valve, an exhalation valve or an inhalation valve.

In one embodiment, the ventilation device further includes a baseline correction button;

In response to the first trigger instruction of the baseline correction button, the processor controls the valve to form an airway open state according to the first trigger instruction, and obtains the pressure value of the preset point corresponding to the first trigger instruction. Baseline value; wherein, the first trigger instruction is generated by the baseline correction button; the baseline correction button is a physical button or a virtual button;

or,

In response to a second trigger instruction for the baseline correction button, the processor controls the valve to form an airway open state according to the second trigger instruction, so as to obtain the preset point pressure corresponding to the second trigger instruction The baseline value of the value is updated; wherein, the second trigger instruction is triggered by the processor according to a preset trigger rule.

In one embodiment, the simulated airway opening state is realized by at least one of the following methods:

The processor adjusts the positive end-expiratory pressure to zero, or controls to open the valve to obtain a simulated airway open state. The first pressure sensor collects the pressure value at a preset point, and based on the simulated air The pressure value at the preset point obtained in the open state of the channel determines the baseline value of the pressure value at the preset point;

In response to the baseline correction instruction, the processor obtains the pressure value of the preset point collected by the first pressure sensor under the current simulated airway state, and based on the predicted value obtained under the corresponding simulated airway state, The set point pressure value determines the baseline value of the preset point pressure value; wherein the positive end-expiratory pressure is manually adjusted to zero by the user, or the valve is opened by the user or the branch is disconnected by the user.

In one embodiment, the first pressure sensor used to collect the pressure value of the preset point during the breathing process of the ventilated subject includes:

The processor is used to collect the pressure value of the first point during the breathing process of the ventilated subject; the pressure value of the first point is the pressure value of the esophagus or the pressure value of the stomach.

In one embodiment, the ventilation equipment also includes:

The second pressure sensor is used to collect the pressure value of the second point during the breathing process of the ventilated subject, and the pressure value of the second point is the airway pressure value;

The processor is further configured to acquire a real-time pressure value of a second point collected by the second pressure sensor based on the simulated airway state formed by opening or closing the valve.

In one embodiment, the processor is further configured to:

Calculate the pressure difference between the first point and the second point according to the real-time collected pressure value of the first point, the real-time collected pressure value of the second point and the baseline value.

According to a second aspect, an embodiment provides a ventilation device comprising:

Processor, where:

Based on the received first correction instruction, the processor is configured to control the valve to form a simulated airway state, and in response to the first correction instruction, obtain a correction baseline value corresponding to the first correction instruction; The corrected baseline value is the pressure value of the preset point measured by the first pressure sensor under the simulated open state of the airway;

and / or,

Based on the received second correction instruction, the processor is configured to obtain a correction baseline value corresponding to the second correction instruction, and collect the preset point pressure obtained by the first pressure sensor in real time according to the correction baseline value The value is corrected to obtain the corrected preset point pressure value.

controlling to display on said display at least one of:

the corrected baseline value of the preset point pressure value;

The corrected pressure value obtained after correcting the real-time collected preset point pressure value according to the corrected baseline value;

Before correction, the initial curve of the pressure value of the preset point collected in real time by the first pressure sensor as a function of time;

A calibration curve of changes in pressure values at preset points over time obtained by correcting the initial curve according to the calibration baseline value.

In one embodiment:

The corrected baseline value of the preset point pressure value is displayed in a display manner different from the preset point pressure value collected in real time.

In an embodiment, the processor subtracts the corrected baseline value from the real-time collected pressure value of the preset point by the first pressure sensor to obtain the corrected pressure value of the preset point.

In one embodiment, the ventilation device further includes a baseline correction button; when the baseline correction button is triggered, the first correction instruction is generated; the baseline correction button is a physical button or a virtual button;

Alternatively, the processor generates the second correction instruction according to a preset trigger rule.

In one embodiment, the ventilation equipment also includes:

The second point pressure value is an airway pressure value;

The processor is further configured to acquire the pressure value of the second point collected in real time by the second pressure sensor.

In an embodiment, the processor is further configured to calculate the first pressure according to the real-time collected pressure value of the first point, the real-time collected pressure value of the second point, and the baseline value of the pressure value of the first point and the difference between the second pressure.

According to a third aspect, an embodiment provides an expansion module of a ventilation device, the ventilation device can obtain the pressure value of the first point during the breathing process of the ventilated subject in real time; the expansion module includes:

a connection module for signally connecting the expansion module with the ventilation device;

An acquisition module, configured to acquire a corrected baseline value, where the corrected baseline value is used to correct the pressure value at the first point.

In an embodiment, the acquisition module acquiring a correction baseline value includes: the acquisition module acquiring a correction baseline value input by a user.

In an embodiment, the expansion module further includes a correction module, configured to correct the real-time pressure value of the first point through the corrected baseline value to obtain a corrected pressure value of the first point for use in the The ventilator is displayed.

According to a fourth aspect, an embodiment provides a pressure monitoring method for a ventilator, including:

Obtain the pressure value of the first point during the breathing process of the ventilated subject collected by the ventilation device under the simulated airway state; wherein the pressure value of the first point is the esophageal pressure value or the intragastric pressure value;

determining a baseline value of a first site pressure value based on said first site pressure value acquired in a simulated airway patency state;

The display shows at least one of the following:

said baseline value of said first site pressure value;

A corrected pressure value obtained after correcting the real-time collected first point pressure value according to the baseline value;

The initial curve of the pressure value of the first point before correction as a function of time;

A correction curve of the pressure value at the first point changing with time obtained after correcting the initial curve according to the baseline value.

According to a fifth aspect, an embodiment provides a pressure monitoring method for a ventilator, including:

Obtain the real-time pressure value of the first point collected during the breathing process of the ventilated subject;

Control the valve of the ventilation device based on the correction instruction to form a corresponding airway state, and obtain a corresponding correction baseline value under the correction instruction in response to the correction instruction; wherein, the correction baseline value is in a simulated airway open state, The first point pressure value collected by the first pressure sensor of the ventilation device;

In response to the correction instruction, at least one of the following is displayed on the display:

said corrected baseline value;

A corrected pressure value obtained after correcting the real-time collected first point pressure value according to the corresponding first point pressure value under the correction instruction;

A correction curve of the pressure value of the first point changing with time obtained after correcting the initial curve according to the pressure value of the first point corresponding to the correction instruction.

Description of drawings

Fig. 1 is the structural representation of a kind of ventilation equipment of embodiment;

Fig. 2 is a schematic structural view of the ventilation device of an embodiment;

Fig. 3 is a schematic structural view of the ventilation device of an embodiment;

Fig. 4 is a structural schematic diagram of a pressure sensor of an embodiment;

Fig. 5 is a structural schematic diagram of a pressure sensor of an embodiment;

Fig. 6 is a schematic structural view of the ventilation device of an embodiment;

Fig. 7 is a schematic diagram of pressure changes in an embodiment of an airway open state;

Fig. 8 is a schematic structural diagram of an expansion module of an embodiment;

Fig. 9 is a schematic structural diagram of an expansion module of an embodiment;

Fig. 10 is a schematic flowchart of a pressure monitoring method for a ventilator according to an embodiment;

Fig. 11 is a schematic flowchart of a pressure monitoring method for a ventilator according to an embodiment.

Embodiments of the present invention

The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings. Wherein, similar elements in different implementations adopt associated similar element numbers. In the following implementation manners, many details are described for better understanding of the present application. However, those skilled in the art can readily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the application are not shown or described in the description, this is to avoid the core part of the application being overwhelmed by too many descriptions, and for those skilled in the art, it is necessary to describe these operations in detail Relevant operations are not necessary, and they can fully understand the relevant operations according to the description in the specification and general technical knowledge in the field.

In addition, the characteristics, operations or characteristics described in the specification can be combined in any appropriate manner to form various embodiments. At the same time, the steps or actions in the method description can also be exchanged or adjusted in a manner obvious to those skilled in the art. Therefore, the various sequences in the specification and drawings are only for clearly describing a certain embodiment, and do not mean a necessary sequence, unless otherwise stated that a certain sequence must be followed.

The serial numbers assigned to components in this document, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. The "connection" and "connection" mentioned in this application include direct and indirect connection (connection) unless otherwise specified.

Some embodiments of the present application provide a ventilation device. Please refer to FIG. 1 , the ventilation equipment in some embodiments includes a breathing assistance device 10 for communicating with a ventilation circuit, a valve 20 disposed on the ventilation circuit or the breathing assistance device, a pressure sensor 30 and a processor 40, etc., and some implementations The ventilation device of the example may also include a display 50 . The respiratory assistance device 10 is used to communicate with a ventilation circuit (such as an exhalation branch, an inspiratory branch or a single tube, etc.), so as to provide mechanical ventilation for the ventilated subject through the ventilation circuit; and through the opening or closing of the valve 20, the The airway opening state of the ventilated subject can be simulated. In some embodiments, the valve 20 includes at least one of a safety valve, an exhalation valve or an inhaled valve; the pressure sensor 30 is used to collect the pressure of the ventilated subject during breathing.

In some embodiments, the ventilator can be a ventilator; the ventilator is an artificial mechanical ventilator, which is used to assist or control the spontaneous breathing movement of the ventilated object, so as to achieve the function of gas exchange in the lungs, reduce the consumption of the human body, and Conducive to the recovery of respiratory function. Please refer to FIG. 2 , in some embodiments, the ventilation device may further include a breathing interface 111 , an air source interface 112 and a breathing circuit.

The breathing circuit selectively communicates the gas source interface 112 with the breathing system of the ventilated subject. In some embodiments, the breathing circuit includes an expiratory branch 113a and an inspiratory branch 113b, and the expiratory branch 113a is connected between the breathing interface 111 and the exhaust port 113c, and is used to guide the exhaled gas of the ventilated subject to the exhaust port 113c. The exhaust port 113c can lead to the external environment, and also can be in a dedicated gas recovery device for the channel. The gas source interface 112 is used to connect with a gas source (not shown in the figure), and the gas source is used to provide gas, such as oxygen and air, etc.; in some embodiments, the gas source can be a compressed gas cylinder or a central The air supply source supplies air to the ventilator through the air source interface 112. The types of air supply include oxygen and air, etc. The air source interface 112 can include a pressure gauge, a pressure regulator, a flow meter, a pressure reducing valve, and an air-oxygen ratio control Common components, such as protective devices, are used to control the flow of various gases, such as oxygen and air, respectively. The inspiratory branch 113b is connected between the respiratory interface 111 and the air source interface 112, and is used to provide oxygen or air for the ventilated subject. Entered lungs of ventilated subject. Respiratory interface 111 is used to connect the ventilated object to the breathing circuit. In addition to introducing the gas transmitted by the inspiratory branch 113b into the ventilated object, the gas exhaled by the ventilated object can also be introduced to the exhaust port through the expiratory branch 113a 113c; according to the situation, the breathing interface 111 can be a nasal cannula or a mask for wearing on the mouth and nose. The breathing assistance device 10 is connected with the gas source interface 112 and the breathing circuit, and controls the gas provided by the external gas source to be delivered to the ventilated subject through the breathing circuit; in some embodiments, the breathing assistance device 10 may include an exhalation controller 114a and an inhalation controller 114b, the exhalation controller 114a is arranged on the exhalation branch 113a, and is used to turn on or close the exhalation branch 113a according to the control command, or control the flow rate or pressure of the exhaled gas of the ventilated subject. During specific implementation, the exhalation controller 114a may include flow controllers and other devices capable of controlling flow or pressure. The suction controller 114b is arranged on the suction branch 113b, and is used for turning on the suction branch 113b or closing the suction branch 113b according to a control command, or controlling the flow rate or pressure of the output gas. During specific implementation, the inhalation controller 114b may include devices capable of controlling flow or pressure, such as a flow controller.

The valve 20 can be set in the breathing circuit, and the valve 20 can also be set on the breathing assistance device 10. In some embodiments, the valve 20 includes at least one of a safety valve, an exhalation valve or an inhalation valve. For example, the exhalation valve can be set at In the exhalation branch 113a, an inhalation valve is provided in the inhalation branch 113b and the like.

The above are some descriptions that the ventilator is a ventilator. It should be noted that the above Figure 2 is just an example of a ventilator, which is not intended to limit the structure of the ventilator.

In some embodiments, the ventilator can also be an anesthesia machine. The anesthesia machine is mainly used to provide anesthesia gas, send the anesthesia gas to the respiratory system of the ventilated subject through the respirator, and control the inhalation amount of the anesthesia gas. Referring to FIG. 3 , the ventilator in some embodiments may further include a breathing interface 211 , an air source interface 212 , an anesthetic output device 230 and a breathing circuit.

The gas source interface 212 is used to connect with a gas source (not shown in the figure), and the gas source is used to provide gas. The gas can usually be oxygen, nitrous oxide (laughing gas) or air. In some embodiments, the gas source can be a compressed gas cylinder or a central gas supply source, which supplies gas to the anesthesia machine through the gas source interface 212. The types of gas supply include oxygen (O ₂ ), laughing gas (N ₂ O), air, etc. . The gas source interface 212 may include conventional components such as pressure gauges, pressure regulators, flow meters, pressure reducing valves, and _N2O - _O2 ratio regulation and protection devices, which are used to control various gases (such as oxygen, laughing gas, and air) respectively. ) flow. The gas input by the gas source interface 212 enters the breathing circuit, and forms a mixed gas with the original gas in the breathing circuit.

In some embodiments, the breathing assistance device 10 can be used to provide power for involuntary breathing of a ventilated subject and maintain airway patency. In some embodiments, the respiratory assistance device 10 is connected with the gas source interface 312 and the breathing circuit, and controls the gas provided by the external gas source to be delivered to the ventilated subject through the breathing circuit. In some specific embodiments, the breathing assistance device 10 mixes the fresh gas input by the gas source interface 312, the gas exhaled by the ventilated subject in the breathing circuit, and the anesthetic drug output by the anesthetic output device 330, and then outputs it to the respiratory interface 311 through the inspiratory branch 340b , to drive the subject to inhale, and receive exhaled gas from the subject through the exhalation branch 240a. In a specific embodiment, the respiratory assistance device 10 generally includes a mechanically controlled ventilation module, and the airflow channel of the mechanically controlled ventilation module communicates with the breathing circuit. During the anesthesia maintenance phase during the operation or when the ventilated subject has not recovered spontaneous breathing, the mechanically controlled ventilation module is used to provide breathing power for the ventilated subject. In some embodiments, the breathing assistance device 10 further includes a manual ventilation module, and the airflow channel of the manual ventilation module communicates with the breathing circuit. During the induction phase prior to intubation of a ventilated subject during a procedure, a manual ventilation module is often required to assist the ventilated subject to breathe. When the breathing assistance device 10 includes both a mechanically controlled ventilation module and a manual ventilation module, the mechanically controlled or manual ventilation mode can be switched through a mechanically controlled or manually controlled switch (such as a three-way valve), so that the mechanically controlled ventilation module or the manual ventilation module The module communicates with the breathing circuit to control breathing of the ventilated subject. Those skilled in the art should understand that the anesthesia machine may only include a mechanically controlled ventilation module or a manual ventilation module according to specific needs.

The anesthetic output device 230 is used to provide anesthetic drugs. Generally, the anesthetic drugs are mixed in the form of gas into the fresh air introduced by the gas source interface 212 and delivered to the breathing circuit together. In a specific embodiment, the anesthetic output device 230 is realized by using an anesthetic volatilization tank. The anesthetic is usually in a liquid state and stored in an anesthetic volatilization tank. Optionally, the anesthetic volatilization tank may include a heating device for heating the anesthetic to volatilize and generate anesthetic vapor. The anesthetic output device 230 is connected to the pipeline of the gas source interface 212 , the anesthetic vapor is mixed with the fresh air introduced by the air source interface 212, and then delivered together into the breathing circuit.

In some embodiments, the breathing circuit can include an inspiratory branch circuit 240b, an expiratory branch circuit 240a, and a soda lime tank 240c. The inspiratory branch circuit 240b and the expiratory branch circuit 240a are connected to form a closed circuit. On the pipeline of branch 240a. The mixed gas of fresh air introduced by the air source interface 212 is input from the inlet of the inhalation branch 240b, and provided to the ventilated subject through the respiratory interface 211 provided at the outlet of the inhalation branch 240b. The respiratory interface 211 can be a face mask, a nasal cannula or an endotracheal cannula. In a preferred embodiment, the inhalation branch 240b may be provided with a valve 20, such as a one-way valve, which is opened during the inhalation phase and closed during the exhalation phase. The exhalation branch 240a is also provided with a valve 20 such as a one-way valve, which is closed during the inhalation phase and opened during the exhalation phase. The inlet of the exhalation branch 240a communicates with the breathing interface 311. When the ventilator exhales, the exhaled gas enters the soda lime tank 240c through the exhalation branch 240a, and the carbon dioxide in the exhaled gas is absorbed by the material in the soda lime tank 240c. After filtering, the gas after filtering carbon dioxide is recirculated into the suction branch 340b.

The above are some descriptions that the ventilator is an anesthesia machine. It should be noted that the above figure 3 is just an example of an anesthesia machine, which is not intended to limit the anesthesia machine to such a structure.

These are some descriptions of ventilation equipment.

In ventilation equipment, such as ventilator or anesthesia machine, etc., the valve 20 usually provided also includes a valve such as a safety valve. In some embodiments, the safety valve can have the following functions:

(1) Protection when the pressure is too high: the airway pressure is too high, and after exceeding the upper limit of the set airway pressure, such as +5cmH ₂ O, open the safety valve to release the pressure;

(2) PEEP over-high protection: For example, when the PEEP value is higher than the PEEP setting value for two consecutive cycles, such as +5cmH ₂ O, the safety valve is opened to release the pressure;

(3) Low negative pressure protection: After the airway pressure is lower than -15cmH ₂ O for a certain period of time, the safety valve is opened so that the ventilated subject can inhale air.

Pressure monitoring is also very important in ventilation equipment. The pressure sensor 30 of the present invention can be, for example, a catheter-type pressure sensor or an optical fiber-type pressure sensor. By inserting the pressure sensor 30 into the corresponding position of the respiratory system of the ventilated subject, the pressure of the corresponding position can be obtained.

In some specific embodiments, please refer to FIG. 4 , the pressure sensor 30 may have a catheter 31 and a balloon 32, the balloon 32 is arranged on the catheter 31, for example, at or near the end of the catheter 31, wherein the end of the catheter 31 is used to extend Enter the corresponding site of the respiratory system of the ventilated subject, such as the airway, such as the esophagus, such as the stomach, etc., and obtain the pressure of the corresponding site by collecting the pressure of the air bag. The other end (ie, the end different from the end) of the catheter 31 is used to connect with the corresponding interface in the ventilator, so as to transmit, process and store the collected pressure values. Preferably, the pressure sensor 30 may also include a catheter balloon extension tube 33, which is connected to the non-terminal end of the catheter and used to extend the catheter 31 to facilitate connection with the corresponding interface in the ventilation device.

If the pressure sensor 30 is inserted into the airway of the ventilated subject, the airway pressure can be collected, that is, the pressure at the corresponding point is the airway pressure; if the pressure sensor 30 is inserted into the esophagus, the esophageal pressure can be collected, that is, the pressure at the corresponding point The pressure is the esophageal pressure; if the pressure sensor 30 is inserted into the stomach, the intragastric pressure can be collected, that is, the pressure at the corresponding point is the intragastric pressure; if the pressure sensor 30 is inserted into the carina inside the trachea, it can be collected Carina pressure, that is, the pressure at the corresponding point is the carina pressure.

Please refer to FIG. 5 , which is a double-balloon pressure sensor 30 . A first balloon 32 a (such as an esophageal balloon) and a second balloon 32 b (such as an intragastric balloon) are sequentially arranged on a catheter 31 , wherein the second balloon is larger than the first balloon. It is closer to the end of the catheter 31; preferably, the other end of the catheter 31 is connected with a first extension tube 33a (such as an esophageal balloon extension tube) and a second extension tube 33b (such as an intragastric balloon extension tube), which can be used for ventilation The corresponding interfaces in the device are respectively connected, so that the ventilator transmits, processes and stores the measured pressure values. Through the double-balloon pressure sensor 30 shown in FIG. 5 , the pressure value of the first balloon and the pressure value of the second balloon can be collected simultaneously, for example, the pressure value of the esophagus and the pressure value of the stomach.

What needs to be said is that the size information of the pressure sensor 30 of the double airbags is also shown in the figure, which is only for illustration, not for limitation, but for illustration.

The number of pressure sensors 30 may be one or more. For example, in some embodiments, the pressure sensors 30 include a first pressure sensor 35 and/or a second pressure sensor 37 - FIG. 6 is an example.

The first pressure sensor 35 is used to collect pressure values at preset points during the breathing process of the subject. Here, the preset points can be all points from the airway to the esophagus in the stomach where the first pressure sensor 35 can measure and touch. In some embodiments, the preset point of the pressure value of the first point may be the first point, that is, the pressure value of the preset point at this time is the pressure value of the first point. In some embodiments, the pressure of the first point Values are esophageal pressure values or intragastric pressure values. The processor 40 can obtain the pressure value of the preset point collected by the first pressure sensor 35 in real time, and the processor 40 can also obtain the baseline value of the pressure value of the preset point according to the pressure value of the preset point collected by the first pressure sensor 35 Specifically, the baseline value (or called the corrected baseline value) of the pressure value at the preset point is: the pressure value at the preset point collected by the first pressure sensor 35 in the simulated airway open state; After the valve 20 opens or closes a branch of the ventilation circuit (the ventilation circuit may include one or more branches, such as an inspiratory branch, an expiratory branch, and/or a single tube, etc.), the open state of the airway is obtained, and then the The pressure value of the preset point collected by the first pressure sensor 35 in this state.

For example, Figure 7 is an example, the abscissa is time, the unit is min; the ordinate is pressure, the unit is cmH ₂ O; the figure shows the real-time esophageal pressure value (Pes), real-time airway pressure value (Paw) And the real-time calculated transpulmonary pressure (Ptp), between 33.3 minutes and 33.25 minutes to form a simulated airway opening state, after stabilization, the real-time esophageal pressure value in this state can be used as the baseline value.

In some embodiments, the simulated airway opening state can be achieved in at least one of the following ways:

Mode 1, the processor 40 adjusts the positive end-expiratory pressure to zero, or controls to open the valve 20 (such as one or more of the safety valve, exhalation valve or inspiratory valve), so as to obtain the simulated airway opening state Next, the first pressure sensor 35 collects the pressure value of the preset point, and determines the baseline value of the pressure value of the preset point (or called the corrected baseline) based on the pressure value of the preset point acquired in the simulated airway open state. value);

Mode 2, in response to the baseline correction instruction, the processor 40 obtains the pressure value of the preset point collected by the first pressure sensor 35 under the current simulated airway state, and based on the preset pressure value obtained under the corresponding simulated airway state The point pressure value determines the baseline value (or called the corrected baseline value) of the preset point pressure value; wherein the positive end-expiratory pressure is manually adjusted to zero by the user, or the valve 20 is opened by the user or the branch of the ventilation circuit is User disconnected. The positive end-expiratory pressure is manually adjusted to zero by the user, or the valve 20 is opened by the user or the branch of the ventilation circuit is disconnected by the user, all of which make the airway state of the ventilated subject be in a simulated airway open state.

For method 1, a typical scenario is that the user triggers the task by operating the ventilator, so that the ventilator automatically adjusts the positive end-expiratory pressure to zero or through the valve to make the airway state of the ventilated subject in a simulated airway opening State, so as to further obtain the baseline value, and can also be further corrected; or, through some preset trigger rules (such as timing trigger, such as triggering when starting up, etc.) to make the ventilator automatically adjust the positive end-expiratory pressure It is zero or the airway state of the ventilated subject is in a simulated airway open state through the valve, so as to further obtain the baseline value and further correct it.

For method 2, a typical scenario is that the user manually makes the ventilation device in a simulated airway open state, for example, the user manually adjusts the positive end-expiratory pressure to zero, or manually opens the valve 20, or manually removes or disconnects the ventilation tube Some branches in the circuit make the airway state of the ventilated subject in the simulated airway open state, and then the user triggers the baseline correction instruction by operating the ventilation device (for example, pressing a specific button). In response to the baseline correction instruction, the processor 40 Obtain the preset point pressure value collected by the first pressure sensor 35 under the current simulated airway state, and determine the preset point pressure value based on the preset point pressure value obtained under the corresponding simulated airway state baseline value and can be further corrected.

In one example, the exhalation valve can be opened during ventilation so that it is completely open (that is, the positive end-expiratory airway pressure PEEP is 0cmH ₂ O, which becomes ZEEP), and the safety valve can also be opened at the same time, and the exhalation valve can Give a small basal flow rate (for example, 0~5L/min), so that the open airway can be simulated, and wait for a certain period of time, for example, 10s, so that the thoracic pressure of the ventilated object is balanced with the atmospheric pressure, and record the pressure at the first point at this time For example, the esophageal pressure value is the baseline value of the real-time esophageal pressure value; after that, the safety valve can be closed, normal ventilation can be restored, and this baseline value can be displayed, or the baseline value can be compared with the real-time collected esophageal pressure value after this baseline value Correction. Different ventilation objects may have different baseline values; for the same ventilation object, the baseline value may also change due to changes in the body position of the ventilation object.

Therefore, in some embodiments, the valve 20 is controlled to open or close by the processor 40 to simulate the airway state of the ventilated subject; wherein the simulated airway state includes the simulated airway open state, that is: The processor 40 can simulate the airway state of the ventilated subject by controlling the opening and closing of the valve 20 , for example, simulating the open state of the airway. In some embodiments, valve 20 includes at least one of a relief valve, an exhalation valve, or an inhalation valve. In some embodiments, the processor 40 can simulate the airway state of the ventilated subject by controlling the opening and closing of the safety valve, for example, simulating the open state of the airway.

In some embodiments, a button can also be introduced into the ventilation device for triggering. For example, in some embodiments, the ventilation device also includes a baseline correction button, which can be a physical structure or a virtual button. When the baseline correction button is a virtual button, it can be clicked with a mouse or touched (at this time, the display is touch-sensitive display) to trigger keys. In some embodiments, in response to the first trigger instruction of the baseline correction button, the processor 40 controls the valve 20 to form an airway open state according to the first trigger instruction, and obtains the baseline of the pressure value of the preset point corresponding to the first trigger instruction value; wherein, the first trigger instruction is generated through the baseline correction button. In some other embodiments, in response to the second trigger instruction of the baseline correction button, the processor 40 controls the valve 20 to form an airway open state according to the second trigger instruction, so as to obtain the pressure value of the preset point corresponding to the second trigger instruction. The baseline value is updated; wherein, the second trigger instruction is triggered by the processor according to the preset trigger rule. The processor 40 controls the valve to form an airway open state according to the second trigger instruction, so as to obtain the preset position corresponding to the second trigger instruction The baseline value of the pressure value is updated; wherein, the second trigger instruction is triggered by the processor 40 according to a preset trigger rule. The preset trigger rule, for example, can be triggered according to time, such as a timing trigger, specifically, it can be triggered once every hour for example; the preset trigger rule can also be triggered according to an event, for example, when the ventilation device is turned on Trigger, for example, when the ventilation device detects that the current airway is open, or when the ventilation device detects that the user opens the safety valve or the branch of the ventilation circuit is disconnected (the airway will be opened).

In some embodiments, the processor 40 can also correct the pressure value of the preset point collected by the first pressure sensor 35 according to the above baseline value, for example, the processor 40 subtracts the pressure value of the preset point collected in real time from the baseline value for correction.

In specific display, the baseline value can be displayed directly, or the corrected pressure value can be displayed for the user to view. Therefore, in some embodiments, the processor 40 controls to display on the display 50 at least one of the following:

(1) Display the baseline value of the pressure value at the preset point;

(2) The corrected pressure value obtained after correcting the real-time collected preset pressure value according to the baseline value;

(3) The initial curve of the pressure value of the preset point before correction with time;

(4) The correction curve of the pressure value of the preset point over time obtained by correcting the above initial curve according to the baseline value.

In some embodiments, the baseline value displayed in (1) above is displayed in a display manner different from the real-time collected pressure value at a preset point. In some embodiments, the calibration curve shown in (4) above is displayed in a manner different from the initial curve shown in (3). There are various implementation schemes for different display methods, such as realizing by different colors, such as displaying by solid lines and dotted lines respectively, and for example, highlighting one of them, and the like.

It can be seen that in some examples, it is only necessary to obtain the baseline value, and in some examples, the baseline value is further used for correction. Therefore, in some embodiments, the processor 40 can be used to control the valve based on the first correction instruction received. 20 to form a simulated airway state, and in response to the above-mentioned first correction command, obtain a corrected baseline value corresponding to the first corrected command; the corrected baseline value is measured by the first pressure sensor 35 under the simulated airway open state In some embodiments, based on the received second calibration instruction, the processor 40 is used to acquire the calibration baseline value corresponding to the second calibration instruction, and collect real-time data from the first pressure sensor according to the calibration baseline value. The obtained pressure value of the preset point is corrected to obtain the corrected pressure value of the preset point.

The above-mentioned first correction instruction can be manually triggered by the user. For example, in some embodiments, the ventilation device also includes a baseline correction button. When the baseline correction button is triggered, the above-mentioned first correction instruction is generated; the baseline correction button can be a physical button or is a virtual key.

The above-mentioned second correction instruction may be generated by the processor 40 according to a preset trigger rule. The preset trigger rule may, for example, be triggered according to time, such as a timing trigger. Specifically, it may be triggered every hour for example. Once; the preset trigger rule can also be triggered according to an event, for example, when the ventilation device is turned on, for example, when the ventilation device detects that the current airway is open, and for example, when the ventilation device detects that the user releases the safety valve When a branch of the ventilation circuit is opened or disconnected (creating an airway patency).

In some embodiments, the pressure value of the preset point during the breathing process of the ventilated subject collected by the first pressure sensor 35 may be the first point pressure value, and the first point pressure value may be the esophageal pressure value or the intragastric pressure value . In some embodiments, when the ventilation device further includes the above-mentioned second pressure sensor 37, the second pressure sensor 37 is used to collect the pressure value of the second point during the breathing process of the ventilated subject; in some embodiments, the processor 40 is also used to Based on the simulated airway state formed by the opening or closing of the valve 20—the airway state may be the airway open state or not, the second point pressure collected by the second pressure sensor 37 in real time is obtained value. In some embodiments, the second point pressure value is an airway pressure value.

In some embodiments, the processor 40 is based on the real-time collected first point pressure value, the real-time collected second point pressure value and the above-mentioned baseline value (the baseline value of the preset point pressure value, that is, the first point pressure the baseline value of the value), the calculation calculates the pressure difference between the first point and the second point. For example, if the pressure at the first point is the esophagus pressure, and the pressure at the second point is the airway pressure, then calculate the pressure difference between the first point and the second point, specifically: The pressure value at the second point, that is, the airway pressure value, is subtracted from the pressure value at the first point after correction, that is, the esophageal pressure value after correction, to obtain the transpulmonary pressure.

In other embodiments, the ventilation device may have two first pressure sensors 35, one for collecting esophageal pressure values, and one for collecting intragastric pressure values, and the preset positions collected by the two first pressure sensors 35 The pressure values can be corrected by the corresponding baseline values, and then the transdiaphragmatic pressure is obtained by subtracting the corrected intragastric pressure value from the corrected esophageal pressure value. In some embodiments, the two first pressure sensors 35 can also be integrated together, for example, realized by the above-mentioned dual preset position pressure sensors.

It should be noted that the ventilator can store the above-mentioned baseline value or corrected baseline value through a memory, etc. When the baseline value needs to be used, for example, the baseline value can be used to compare the pressure value of the preset point collected by the first pressure sensor 35 When performing correction, the stored baseline value can be recalled; in addition, the baseline value can be stored in chronological order, and the stored baseline value can be updated each time a new baseline value is obtained, for example, the later baseline value can be overwritten The previously stored baseline value.

Considering the upgrade and compatibility of the ventilation equipment in the prior art, some embodiments of the present application also provide an expansion module of the ventilation equipment. A point pressure value is set, and the preset point pressure value may be, for example, a first point pressure value, and the first point pressure value may be, for example, an esophageal pressure value or an intragastric pressure value. The expansion module can be connected with the ventilation equipment, for example, the two can be pluggable, so that the signal connection can be carried out, that is, the transmission or exchange of signals and data can be carried out, so that the existing ventilation equipment can also be acquired and used As for the function of the baseline value, using the baseline value may be, for example, displaying the baseline value, for example, correcting the pressure value of a preset point through the baseline value. The extension module is further explained below.

Please refer to FIG. 8 , the expansion module of some embodiments includes a connection module 71 and an acquisition module 73 , the connection module 71 is used for signal connection of the expansion module with the ventilator, in other words, the expansion module can communicate with the ventilator through its own connection module 71 . The device signal connection; the acquisition module 73 is used to acquire the baseline value or to correct the baseline value, and the corrected baseline value is used to correct the preset point pressure value, such as the first point point pressure value.

In some specific embodiments, the acquisition module 73 acquires the correction baseline value, including: the acquisition module 73 acquires the correction baseline value input by the user. For example, the acquisition module 73 may have an input structure such as a numeric keypad, or a digital knob. The user inputs the corrected baseline value through the acquired module 73, and the expansion module transmits the received corrected baseline value to the ventilator through the connection module 71.

After the ventilator receives the corrected baseline value transmitted by the expansion module, it can directly display the baseline value for the user to view, or it can correct the baseline value and display the corrected pressure value for the user to view; for example, the ventilator After receiving the corrected baseline value transmitted by the expansion module, at least one of the following can be displayed on its display:

(1) Display the calibration baseline value;

(2) The corrected pressure value obtained after correcting the real-time collected preset point pressure value, such as the first point pressure value, according to the corrected baseline value;

(4) The correction curve of the pressure value of the preset point over time obtained by correcting the above initial curve according to the correction baseline value.

In some examples, please refer to FIG. 9, the expansion module also has a correction module 75, the expansion module obtains the correction baseline value from the acquisition module 73, and also obtains the preset point pressure value from the ventilator, and then the correction module 75 corrects the baseline value pair The real-time preset point pressure value, such as the first point pressure value, is corrected to obtain a corrected first point point pressure value, that is, a corrected pressure value, for display by, for example, a ventilator. In this way, the ventilation device can directly display the corrected preset pressure value, that is, the corrected pressure value, for the user to view. For example, the ventilator displays at least one of the following on its display: the corrected pressure value, the corrected preset position Calibration curves of pressure values versus time, etc.

In some examples, the expansion module may also have a display component (not shown in the figure) to display at least one of the above (1) to (4) through the display component.

In some embodiments of the present application, a pressure monitoring method of a ventilation device is also disclosed, which will be described in detail below.

Please refer to FIG. 10 , the pressure monitoring method of some embodiments includes the following steps:

Step 100: Obtain the pressure value of the first point during the breathing process of the ventilated subject collected by the ventilator under the simulated airway state. In some embodiments, the pressure value of the first point is an esophageal pressure value or an intragastric pressure value.

Step 110: Determine a baseline value of the first site pressure value based on the acquired first site pressure value in the simulated airway open state.

The formation and triggering of the simulated airway opening state can refer to the description above, and will not be repeated here.

Step 120: Display at least one of the following through the display:

(1) The baseline value of the pressure value at the first site;

(2) The corrected pressure value obtained by correcting the real-time collected pressure value of the first point according to the baseline value;

(3) The initial curve of the pressure value at the first point before correction as a function of time;

(4) A calibration curve of the pressure value at the first point changing with time obtained by correcting the initial curve according to the baseline value.

Please refer to FIG. 11 , the pressure monitoring method of some embodiments includes the following steps:

Step 200: Obtain the pressure value of the first point collected in real time during the breathing process of the ventilated subject. In some embodiments, the pressure value of the first point is an esophageal pressure value or an intragastric pressure value.

Step 210: Control the valve of the ventilation device based on the correction instruction to form a corresponding airway state, and obtain the corresponding correction baseline value under the correction instruction in response to the correction instruction; wherein, the correction baseline value is simulated. The pressure value of the first point collected by the first pressure sensor of the device.

Step 220: In response to the calibration instruction, display at least one of the following via the display:

(1) Calibrate the baseline value;

(2) The corrected pressure value obtained after correcting the real-time collected first point pressure value according to the corresponding first point pressure value under the correction command;

(4) The correction curve of the pressure value of the first point changing with time obtained after correcting the initial curve according to the pressure value of the first point corresponding to the correction instruction.

The above are some descriptions of this application.

It can be seen that, in some embodiments, the ventilation device can control the valve 20 to achieve a simulated airway opening state, thereby obtaining a corrected baseline value, and performing a baseline on the first site pressure value such as esophageal pressure value or intragastric pressure value. Correction.

This document is described with reference to various exemplary embodiments. However, those skilled in the art will recognize that changes and modifications can be made to the exemplary embodiments without departing from the scope herein. For example, the various operational steps, as well as the components used to perform the operational steps, may be implemented in different ways depending on the particular application or considering any number of cost functions associated with the operation of the system (e.g., one or more steps may be deleted, modified or incorporated into other steps).

In the above embodiments, all or part of them may be implemented by software, hardware, firmware or any combination thereof. In addition, the principles herein may be embodied in a computer program product on a computer-readable storage medium having computer-readable program code preloaded thereon, as understood by those skilled in the art. Any tangible, non-transitory computer-readable storage medium may be used, including magnetic storage devices (hard disks, floppy disks, etc.), optical storage devices (CD-to-ROM, DVD, Blu Ray discs, etc.), flash memory and/or the like . These computer program instructions can be loaded into a general purpose computer, special purpose computer or other programmable data processing apparatus to form a machine, so that these instructions executed on the computer or other programmable data processing apparatus can generate an apparatus for realizing specified functions. These computer program instructions may also be stored in a computer-readable memory which can instruct a computer or other programmable data processing device to operate in a particular manner such that the instructions stored in the computer-readable memory form a Manufactures, including implementing devices for implementing specified functions. Computer program instructions can also be loaded on a computer or other programmable data processing device, thereby performing a series of operational steps on the computer or other programmable device to produce a computer-implemented process, so that the computer or other programmable device Instructions may provide steps for performing specified functions.

While the principles herein have been shown in various embodiments, many modifications in structure, arrangement, proportions, elements, materials and components, particularly suited to particular circumstances and operational requirements may be made without departing from the principles and scope of this disclosure use. The above modifications and other changes or amendments are intended to be included within the scope of this document.

The foregoing detailed description has been described with reference to various embodiments. However, those skilled in the art will recognize that various modifications and changes can be made without departing from the scope of the present disclosure. Accordingly, the disclosure is to be considered in an illustrative rather than a restrictive sense, and all such modifications are intended to be embraced within its scope. Also, advantages, other advantages and solutions to problems have been described above with respect to various embodiments. However, neither benefits, advantages, solutions to problems, nor any elements that lead to these, or make the solutions more definite, should be construed as critical, required, or necessary. As used herein, the term "comprises" and any other variants thereof are non-exclusive, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also elements not expressly listed or not part of the process. , method, system, article or other element of a device. Additionally, the term "coupled" and any other variations thereof, as used herein, refers to a physical connection, an electrical connection, a magnetic connection, an optical connection, a communicative connection, a functional connection, and/or any other connection.

Those skilled in the art will recognize that many changes may be made to the details of the above-described embodiments without departing from the underlying principles of the invention. Accordingly, the scope of the invention should be determined only by the claims.

Claims

A ventilator, characterized in that it comprises:

a breathing assistance device configured to communicate with a ventilation circuit for providing mechanical ventilation to a subject to be ventilated through the ventilation circuit;

The valve provided on the ventilation pipeline or the breathing assistance device, through the opening or closing of the valve, the airway opening state of the ventilated subject can be simulated;

The first pressure sensor is used to collect the pressure value of the preset point during the breathing process of the ventilated subject;

Processor, where:

The processor is configured to obtain the pressure value of a preset point collected in real time by the first pressure sensor;

The processor is further configured to obtain a baseline value of the preset point pressure value according to the preset point pressure value;

Wherein, the baseline value of the pressure value at the preset point is the value collected by the first pressure sensor when the simulated airway opening state is obtained after the branch of the ventilation pipeline is opened or closed by the valve. Preset point pressure value.
The ventilation device according to claim 1, wherein the processor is further used for:

Correcting the pressure value of the preset point collected by the first pressure sensor according to the baseline value.
Ventilation device according to claim 2, characterized in that,

The processor subtracts the baseline value from the real-time collected pressure value at a preset point for correction.
The ventilation device of claim 1, further comprising a display, the processor further configured to:

controlling to display on said display at least one of:

the baseline value of the preset point pressure value;

A corrected pressure value obtained after correcting the real-time collected preset pressure value according to the baseline value;

The initial curve of the pressure value of the preset point before correction versus time;

A correction curve of pressure values at preset points over time obtained by correcting the initial curve according to the baseline value.
Ventilation device according to claim 4, characterized in that,

The baseline value of the preset point pressure value is displayed in a display manner different from the preset point pressure value collected in real time.
The ventilation device according to claim 1, wherein the valve is controlled to be opened or closed by the processor to simulate the airway state of the ventilated subject; in the simulated airway state , including the simulated airway patency.
The ventilation device of claim 1, wherein the valve comprises at least one of a safety valve, an exhalation valve, or an inhalation valve.
The ventilation device according to claim 1, further comprising a baseline correction button;

In response to the first trigger instruction of the baseline correction button, the processor controls the valve to form an airway open state according to the first trigger instruction, and obtains the pressure value of the preset point corresponding to the first trigger instruction. Baseline value; wherein, the first trigger instruction is generated by the baseline correction button; the baseline correction button is a physical button or a virtual button;

or,

In response to a second trigger instruction for the baseline correction button, the processor controls the valve to form an airway open state according to the second trigger instruction, so as to obtain the preset point pressure corresponding to the second trigger instruction The baseline value of the value is updated; wherein, the second trigger instruction is triggered by the processor according to a preset trigger rule.
The ventilation device according to claim 1, wherein the simulated open state of the airway is realized by at least one of the following methods:

The processor adjusts the positive end-expiratory pressure to zero, or controls to open the valve to obtain a simulated airway open state. The first pressure sensor collects the pressure value at a preset point, and based on the simulated air The pressure value at the preset point obtained in the open state of the channel determines the baseline value of the pressure value at the preset point;

In response to the baseline correction instruction, the processor obtains the pressure value of the preset point collected by the first pressure sensor under the current simulated airway state, and based on the predicted value obtained under the corresponding simulated airway state, The set point pressure value determines the baseline value of the preset point pressure value; wherein the positive end-expiratory pressure is manually adjusted to zero by the user, or the valve is opened by the user or the branch is disconnected by the user.
The ventilation device according to any one of claims 1 to 9, wherein the first pressure sensor is used to collect the pressure value of a preset point during the breathing process of the ventilated subject, including:

The processor is used to collect the pressure value of the first point during the breathing process of the ventilated subject; the pressure value of the first point is the pressure value of the esophagus or the pressure value of the stomach.
The ventilation device according to any one of claims 1 to 10, further comprising:

The second pressure sensor is used to collect the pressure value of the second point during the breathing process of the ventilated subject, and the pressure value of the second point is the airway pressure value;

The processor is further configured to acquire a real-time pressure value of a second point collected by the second pressure sensor based on the simulated airway state formed by opening or closing the valve.
The ventilation device of claim 11, wherein said processor is further configured to:

Calculate the pressure difference between the first point and the second point according to the real-time collected pressure value of the first point, the real-time collected pressure value of the second point and the baseline value.
A ventilator, characterized in that it comprises:

a breathing assistance device configured to communicate with a ventilation circuit for providing mechanical ventilation to a subject to be ventilated through the ventilation circuit;

The valve provided on the ventilation pipeline or the breathing assistance device, through the opening or closing of the valve, the airway opening state of the ventilated subject can be simulated;

The first pressure sensor is used to collect the pressure value of the preset point during the breathing process of the ventilated subject;

Processor, where:

Based on the received first correction instruction, the processor is configured to control the valve to form a simulated airway state, and in response to the first correction instruction, obtain a correction baseline value corresponding to the first correction instruction; The corrected baseline value is the pressure value of the preset point measured by the first pressure sensor under the simulated open state of the airway;

and / or,

Based on the received second correction instruction, the processor is configured to obtain a correction baseline value corresponding to the second correction instruction, and collect the preset point pressure obtained by the first pressure sensor in real time according to the correction baseline value The value is corrected to obtain the corrected preset point pressure value.
The ventilation device of claim 13, further comprising a display, the processor further configured to:

controlling to display on said display at least one of:

the corrected baseline value of the preset point pressure value;

The corrected pressure value obtained after correcting the real-time collected preset point pressure value according to the corrected baseline value;

Before correction, the initial curve of the pressure value of the preset point collected in real time by the first pressure sensor as a function of time;

A calibration curve of changes in pressure values at preset points over time obtained by correcting the initial curve according to the calibration baseline value.
The ventilation device of claim 14, wherein:

The corrected baseline value of the preset point pressure value is displayed in a display manner different from the preset point pressure value collected in real time.
The ventilation device according to claim 13, wherein the processor subtracts the corrected baseline value from the preset point pressure value collected by the first pressure sensor in real time to obtain a corrected preset Point pressure value.
The ventilation device of claim 13, wherein the valve comprises at least one of a safety valve, an exhalation valve, or an inhalation valve.
The ventilation device according to claim 13, further comprising a baseline correction button; when the baseline correction button is triggered, the first correction instruction is generated; the baseline correction button is a physical button or a virtual button ;

Alternatively, the processor generates the second correction instruction according to a preset trigger rule.
The ventilation device according to any one of claims 13 to 18, wherein the first pressure sensor is used to collect the pressure value of a preset point during the breathing process of the ventilated subject, including:

The processor is used to collect the pressure value of the first point during the breathing process of the ventilated subject; the pressure value of the first point is the pressure value of the esophagus or the pressure value of the stomach.
The ventilation device of claim 19, further comprising:

The second point pressure value is an airway pressure value;

The processor is further configured to acquire the pressure value of the second point collected in real time by the second pressure sensor.
The ventilation device according to claim 20, wherein the processor is further configured to, according to the real-time collected first point pressure value, the real-time collected second point pressure value and the first point pressure The baseline value of the value, calculates the difference between the first pressure and the second pressure.
An expansion module of a ventilation device, the ventilation device can obtain the pressure value of the first point in the breathing process of a ventilated object in real time; it is characterized in that the expansion module includes:

a connection module for signally connecting the expansion module with the ventilation device;

An acquisition module, configured to acquire a corrected baseline value, where the corrected baseline value is used to correct the pressure value at the first point.
The expansion module according to claim 22, wherein the acquisition module acquires the correction baseline value, comprising: the acquisition module acquiring the correction baseline value input by the user.
The expansion module according to claim 22, further comprising a correction module, configured to correct the real-time pressure value of the first point through the corrected baseline value to obtain a corrected pressure value of the first point, for display by the ventilator.
A pressure monitoring method for ventilation equipment, characterized in that it comprises:

Obtain the pressure value of the first point during the breathing process of the ventilated subject collected by the ventilation device under the simulated airway state; wherein the pressure value of the first point is the esophageal pressure value or the intragastric pressure value;

determining a baseline value of a first site pressure value based on said first site pressure value acquired in a simulated airway patency state;

The display shows at least one of the following:

said baseline value of said first site pressure value;

A corrected pressure value obtained after correcting the real-time collected first point pressure value according to the baseline value;

The initial curve of the pressure value of the first point before correction as a function of time;

A correction curve of the pressure value at the first point changing with time obtained after correcting the initial curve according to the baseline value.
A pressure monitoring method for ventilation equipment, characterized in that it comprises:

Obtain the real-time pressure value of the first point collected during the breathing process of the ventilated subject;

Control the valve of the ventilation device based on the correction instruction to form a corresponding airway state, and obtain a corresponding correction baseline value under the correction instruction in response to the correction instruction; wherein, the correction baseline value is in a simulated airway open state, The first point pressure value collected by the first pressure sensor of the ventilation device;

In response to the correction instruction, at least one of the following is displayed on the display:

said corrected baseline value;

A corrected pressure value obtained after correcting the real-time collected first point pressure value according to the corresponding first point pressure value under the correction instruction;

The initial curve of the pressure value of the first point before correction as a function of time;

A correction curve of the pressure value of the first point changing with time obtained after correcting the initial curve according to the pressure value of the first point corresponding to the correction instruction.