Anesthesia ventilation system and gas source status monitoring method thereof

Abstract

This specification discloses an anesthesia ventilation system and a method for monitoring its gas source status. The system includes a gas source interface and a ventilation branch connected to the gas source interface, and the ventilation branch is provided with a flow regulating device and a sensor. The method includes: adjusting the opening of the flow regulating device (S110); detecting the output parameter value of the ventilation branch through the sensor (S120); if it is detected that the output parameter value is less than the predetermined parameter output value, shows a decreasing trend, or drops to zero, it is determined that the gas source of the ventilation branch is abnormal (S130).

Description

Technical Field

[0001] The present application relates to the field of medical devices, and in particular to an anesthesia ventilation system and a method for monitoring the gas source status thereof. Background Art

[0002] Anesthesia machines or ventilators usually include oxygen, air or nitrous oxide gas source branches. It is usually necessary to install a large number of sensors or pressure switches for each branch to detect the gas supply status of the corresponding branch, thereby providing the necessary gas source information for the system control rules or providing the user with alarm information of gas source abnormalities; this undoubtedly increases the cost and complexity of the system. Summary of the Invention

[0003] Based on this, this specification provides an anesthesia ventilation system and a method for monitoring its gas source status, which can detect the flow rate and / or pressure of the ventilation branch based on the sensor on the ventilation branch of the ventilation system, and then determine whether the gas source of the ventilation branch is abnormal.

[0004] In a first aspect, an embodiment of the present application provides a method for monitoring a gas source status for an anesthesia ventilation system, the anesthesia ventilation system comprising: a gas source interface and at least one ventilation branch connected to the gas source interface, the ventilation branch being provided with a flow regulating device and a sensor;

[0005] The method comprises:

[0006] adjusting the opening of the flow regulating device;

[0007] Detecting an output parameter value of the ventilation branch by the sensor, wherein the output parameter value includes flow rate and / or pressure;

[0008] If it is detected that the output parameter value of the ventilation branch is less than the predetermined parameter output value, shows a decreasing trend, or drops to zero, it is determined that the air source of the ventilation branch is abnormal.

[0009] In a second aspect, an embodiment of the present application provides an anesthesia ventilation system, comprising: the anesthesia ventilation system comprising: a gas source interface and at least one ventilation branch connected to the gas source interface, the ventilation branch being provided with a flow regulating device and a sensor;

[0010] The anesthesia ventilation system further includes a processor, which is configured to execute the aforementioned gas source status monitoring method.

[0011] The embodiments of this specification provide an anesthesia ventilation system and a method for monitoring its gas source status, by adjusting the opening of the flow regulating device and detecting the output parameter value of its ventilation branch, such as flow rate and / or pressure, through the sensor of the anesthesia ventilation system; when it is detected that the output parameter value of the ventilation branch is less than the predetermined parameter output value, shows a decreasing trend, or drops to zero, it is determined that the gas source of the ventilation branch is abnormal; the flow regulating device and sensor inherent in the anesthesia ventilation system are used to identify the gas source connection status, so there is no need to install additional pressure switches for each ventilation branch to detect the gas source supply status of the corresponding branch, thereby saving system costs and reducing system complexity.

[0012] It should be understood that the foregoing general description and the following detailed description are merely exemplary and explanatory and are not restrictive of the disclosure of this specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of this specification, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are some embodiments of this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0014] Figure 1 1 is a flow chart of a method for monitoring gas source status in one embodiment;

[0015] Figure 2 It is a structural diagram of an anesthesia ventilation system;

[0016] Figure 3 It is a structural diagram of the anesthesia system;

[0017] Figure 4 It is a flow chart of an implementation method of a gas source status monitoring method.

[0018] Reference numerals: 10, anesthesia ventilation system; 11, gas source interface; 12, ventilation branch; 13, flow regulating device; 14, sensor;

[0019] 100, anesthesia system; 110, anesthesia control equipment; 111, vaporizer; 112, common output channel; 120, auxiliary gas control subsystem; 121, auxiliary output; 130, main breathing system;

[0020] 101. Anesthetic gas source; 102. Oxygen source; 103. Air source; 104. Pressure regulator. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of this specification to clearly and completely describe the technical solutions in the embodiments of this specification. Obviously, the embodiments described are part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this specification.

[0022] The flowcharts shown in the accompanying drawings are for illustrative purposes only and do not necessarily include all contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may be decomposed, combined, or partially merged, so the actual execution order may vary depending on the actual situation.

[0023] The following describes some embodiments of the present specification in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0024] See also Figure 1 , Figure 1 This is a flow chart of a gas source status monitoring method provided in one embodiment of this specification.

[0025] The gas source status monitoring method can be applied in the anesthesia ventilation system to monitor the status of the ventilation branch connected to the gas source in the anesthesia ventilation system and other processes.

[0026] For example, Figure 2 FIG. 1 is a schematic structural diagram of an anesthesia ventilation system 10 .

[0027] like Figure 2 As shown, the anesthesia ventilation system 10 includes: an air source interface 11 and at least one ventilation branch 12 connected to the air source interface 11 , and the ventilation branch 12 is provided with a flow regulating device 13 and a sensor 14 .

[0028] Exemplarily, the flow regulating device 13 may include a proportional valve, and the opening of the proportional valve may be controlled by adjusting the current of the proportional valve.

[0029] For example, Figure 3 FIG. 1 is a schematic structural diagram of an anesthesia system 100. The anesthesia system 100 may include an anesthesia control device 110 and / or an auxiliary gas control subsystem 120. The gas source status monitoring method may be applied to the anesthesia control device 110 and / or the auxiliary gas control subsystem 120. It is understood that the anesthesia ventilation system 10 may include the anesthesia control device 110 and / or the auxiliary gas control subsystem 120.

[0030] like Figure 3As shown, the anesthesia control device 110 includes, for example, three gas source interfaces 11 and corresponding three ventilation branches 12. The three gas source interfaces 11 are used to connect an anesthetic gas (such as nitrous oxide) source 101, an oxygen source 102, and an air source 103, respectively.

[0031] Exemplarily, the gas source connected to the gas source interface 11 is provided with a pressure regulator 104 at its outlet, so that the gas source can provide gas of a specific pressure to the ventilation branch 12. The gas source, for example, includes a compressed gas tank and / or a gas supply tube for connecting to hospital oxygen / medical air / nitrous oxide.

[0032] By controlling the opening of the flow regulating devices 13 of the three ventilation branches 12 in the anesthesia control device 110, the proportions of various gases from various gas sources can be mixed to obtain a mixed gas.

[0033] For example, Figure 3 As shown, the anesthesia control device 110 may further include one or more vaporizers 111 for adding an anesthetic medium into the mixed gas.

[0034] Exemplarily, the anesthesia control device 110 releases a mixed gas containing an anesthetic medium to the main breathing system 130 through the common output channel 112 .

[0035] The main breathing system 130 can, for example, include a ventilator, a carbon dioxide absorber, an air storage bag, a purification system for removing excess gas, a breathing heating system, a bacterial filter, and / or a humidifier. It will be readily understood by those skilled in the art that the main breathing system 130 according to an embodiment of the present application can be operated in a variety of ventilation modes, such as: pressure controlled ventilation (PCV), pressure support ventilation (PS), synchronized intermittent mandatory ventilation (SIMV), and volume controlled ventilation (CMV). When needed, the main breathing system 130 provides breathable gas and anesthetic media to the patient through a main output, typically through an endotracheal tube or a throat mask airway.

[0036] For example, Figure 3 As shown, the anesthesia system 100 may further include an auxiliary gas control subsystem 120. The auxiliary gas control subsystem 120, for example, includes at least two gas source interfaces 11 and corresponding at least two ventilation branches 12. The two gas source interfaces 11 are respectively used to connect to two of the anesthetic gas (e.g., nitrous oxide) source 101, oxygen source 102, and air source 103.

[0037] The auxiliary gas control subsystem 120 can operate independently of the anesthesia control device 110 and the main breathing system 130 to selectively deliver a separate mixed gas to the patient through the auxiliary output 121. The auxiliary output 121 can be connected to the patient in the following ways, for example, a nasal cannula. Those of ordinary skill in the art will find that the auxiliary output 121 can be connected to the patient through other forms of devices, such as a mask. By integrating the functions of the auxiliary gas control subsystem 120, the gas source, the anesthesia control device 110 and the main breathing system 130, the user can easily and selectively provide approximately 21% (e.g., approximately 100% air) to approximately 100% oxygen through the auxiliary gas output.

[0038] Illustratively, the auxiliary gas control subsystem 120 may provide automatic flow adjustment of either or both gases to achieve a desired oxygen percentage through the auxiliary output 121 .

[0039] like Figure 1 As shown, the gas source status monitoring method of the embodiment of this specification includes steps S110 to S130.

[0040] S110, adjusting the opening of the flow regulating device.

[0041] For example, when the anesthesia ventilation system starts working, the flow regulating device on at least one ventilation branch is adjusted to open so that the gas source connected to the ventilation branch can output gas. During this period, the output parameter value of the ventilation branch can be detected by a sensor.

[0042] In some embodiments, the flow regulating device may have a plurality of preset openings.

[0043] For example, a plurality of preset openings can be represented as F0, F1, ..., Fn-1, where F0 <F1<…<Fn-1。

[0044] For example, if the gas source of the anesthesia ventilation system is normal, when the flow regulating device is at each opening degree, the output parameter value of the ventilation branch should not be less than the preset output parameter value corresponding to the opening degree.

[0045] S120. Detecting an output parameter value of the ventilation branch by the sensor, where the output parameter value includes flow rate and / or pressure.

[0046] Exemplarily, the sensor includes a flow rate sensor and / or a pressure sensor.

[0047] S130: If it is detected that the output parameter value of the ventilation branch is less than the predetermined parameter output value, shows a decreasing trend, or drops to zero, it is determined that the air source of the ventilation branch is abnormal.

[0048] In some embodiments, the abnormal gas source may include: insufficient gas in the gas source connected to the ventilation branch, disconnection of the gas source connected to the ventilation branch, or no connection of the ventilation branch to the gas source.

[0049] For example, if it is detected that the output parameter value of the ventilation branch is zero when the flow regulating device is at a certain opening degree, it can be determined that the air source connected to the ventilation branch is disconnected or the ventilation branch is not connected to the air source.

[0050] For example, when the current opening of the flow regulating device is at the maximum opening, and the detected output parameter value is zero, it is determined that the air source connected to the ventilation branch is disconnected or the ventilation branch is not connected to the air source.

[0051] For example, if the output parameter value of the ventilation branch is detected to be decreasing, it can be determined that the air source of the ventilation branch is disconnected or the air source is insufficient. If the output parameter value of the ventilation branch detected by the sensor decreases from a larger value to a smaller value (greater than 0), it is determined that the air source of the ventilation branch is abnormal, for example, it is determined that the air source of the ventilation branch is insufficient; if the output parameter value of the ventilation branch detected by the sensor decreases from a larger value to 0, it is determined that the air source of the ventilation branch is abnormal, for example, it is determined that the air source of the ventilation branch is disconnected.

[0052] In some embodiments, the predetermined parameter output value may be equal to a control demand threshold.

[0053] For example, the control demand threshold can be set based on user needs, for example, for each ventilation branch. The control demand threshold can be determined, for example, based on the output parameter value of the ventilation branch required by the patient. For example, when the output parameter value of the ventilation branch is less than the control demand threshold, the patient may not receive sufficient gas or may not be properly anesthetized.

[0054] Specifically, the openings F0, F1, ..., and Fn-1 of the flow control device correspond to respective preset output parameter values. For example, when the gas source is normal, the flow control device is adjusted to openings F0, F1, ..., and Fn-1, and the output parameter values ​​of the ventilation branches at each opening are obtained as the preset output parameter values ​​for the corresponding openings. For example, the control demand threshold is no greater than the preset output parameter value corresponding to opening F0.

[0055] In some embodiments, when the gas source of the ventilation branch is abnormal, abnormal prompt information can be output, such as controlling a red indicator light to light up, etc., to prompt the operator of the anesthesia ventilation system to perform inspection and maintenance.

[0056] Exemplarily, a normal prompt message may be output when the gas source of the ventilation branch is normal, for example, a green indicator light may be controlled to light up.

[0057] In some embodiments, the flow regulating device can be controlled to be closed when the air source of the ventilation branch is abnormal. For example, the flow regulating device is controlled to be closed and an abnormality prompt message is output; after the operator maintains the air source, the flow regulating device is reopened.

[0058] Exemplarily, if it is detected that the output parameter value of the ventilation branch is less than a predetermined parameter output value, determining that the air source of the ventilation branch is abnormal includes:

[0059] The opening of the flow regulating device is increased to a maximum opening. If the output parameter value of the ventilation branch is less than the control demand threshold, it is determined that the air source of the ventilation branch cannot meet the demand.

[0060] For example, when the gas source of the ventilation branch is normal or the gas source is insufficient but can meet the patient's needs, the output parameter value of the ventilation branch can be no less than the control demand threshold when the flow regulating device is at the minimum opening, or the output parameter value of the ventilation branch can gradually increase to the control demand threshold when the opening of the flow regulating device is gradually increased.

[0061] Specifically, if the opening degree of the flow regulating device has reached the maximum, and the output parameter value of the ventilation branch is still less than the control demand threshold, it can be determined that the gas source is insufficient and cannot meet the demand.

[0062] For example, when the gas source is insufficient and cannot meet the demand, a prompt indicating that the gas source cannot meet the demand can be output. Of course, the flow regulating device can also be controlled to be closed, and the flow regulating device can be reopened after the operator maintains the gas source.

[0063] In some embodiments, adjusting the opening of the flow regulating device includes gradually increasing the opening of the flow regulating device.

[0064] Specifically, the flow regulating device can be opened from closed and then the opening degree can be adjusted to gradually increase, or the opening degree of the flow regulating device can be gradually increased from a relatively small opening degree.

[0065] For example, when the pressure of the ventilation branch's air source is high, the flow control device can be opened at a relatively small degree when the ventilation branch's output parameter value rises to the control requirement threshold. Conversely, when the pressure of the ventilation branch's air source is low, the flow control device can be opened at a relatively large degree when the ventilation branch's output parameter value rises to the control requirement threshold. By gradually increasing the opening of the flow control device, the ventilation branch's output parameter value can be more accurately brought to the control requirement threshold.

[0066] For example, if the flow regulating device is at a certain opening degree and the output parameter value of the detected ventilation branch is not less than the control demand threshold, it is determined that the air source of the ventilation branch is normal or can meet the demand.

[0067] Specifically, if the output parameter value of the ventilation branch detected is less than the control demand threshold when the flow regulating device is at a certain opening; but as the opening increases, the output parameter value measured at a certain moment is not less than the control demand threshold, then it is determined that the gas source of the ventilation branch can meet the demand.

[0068] Exemplarily, adjusting the opening of the flow regulating device includes: adjusting the opening of the flow regulating device to a maximum opening.

[0069] For example, the opening of the flow regulating device can be directly adjusted to the maximum, and then the output parameter value of the ventilation branch can be detected. If the output parameter value is less than the control demand threshold, it is determined that the air source of the ventilation branch cannot meet the demand.

[0070] In some embodiments, the predetermined parameter output value may be a theoretical output value corresponding to the current opening of the flow regulating device when the gas source is normal.

[0071] Exemplarily, when the gas source is normal, the flow regulating device is adjusted to openings F0, F1, ..., Fn-1, and the output parameter values ​​of the ventilation branch at each opening are respectively obtained and saved as predetermined parameter output values ​​of the corresponding opening.

[0072] For example, when the opening of the flow regulating device is adjusted to, for example, the opening Fi in step S110, if the output parameter value of the ventilation branch detected in step S120 is not less than the predetermined parameter output value of the opening Fi, it can be determined that the air source of the ventilation branch is normal.

[0073] For example, when the gas source of the ventilation branch is normal, the anesthesia ventilation system can operate normally. Specifically, for example, the opening of the flow regulating device can be closed-loop controlled based on the output parameter value fed back in real time by the sensor so that the output parameter value of the ventilation branch reaches a required output parameter value such as flow rate and / or pressure. At this output parameter value, the anesthesia ventilation system can provide sufficient gas to the patient. This output parameter value is, for example, not less than the control requirement threshold.

[0074] For example, when the anesthesia ventilation system is working, if the difference between the current output parameter value and the required output parameter value is too large, that is, the current output parameter value is too large, the opening of the flow regulating device can be further reduced to prevent the supply of gas with excessive flow rate or pressure from causing discomfort to the patient.

[0075] Exemplarily, when the output parameter value of the ventilation branch is smaller than the theoretical output value corresponding to the current opening of the flow regulating device, it is determined that the air source of the ventilation branch is abnormal.

[0076] Specifically, when the opening of the flow regulating device is adjusted to, for example, the opening Fi in step S110, if the output parameter value of the ventilation branch detected in step S120 is less than the predetermined parameter output value of the opening Fi, it can be determined that the air source of the ventilation branch is abnormal.

[0077] The abnormality of the gas source may include: insufficient gas in the gas source connected to the ventilation branch, disconnection of the gas source connected to the ventilation branch, or the ventilation branch is not connected to the gas source.

[0078] Exemplarily, after determining that the air source of the ventilation branch is abnormal, the method further includes: increasing the opening of the flow regulating device to the maximum opening; if the output parameter value of the ventilation branch is less than the control demand threshold, determining that the air source of the ventilation branch cannot meet the demand.

[0079] Specifically, the opening of the flow regulating device is gradually increased, or the opening of the flow regulating device is adjusted to the maximum opening. If the output parameter value of the ventilation branch can be equal to or greater than the control demand threshold, it is determined that the gas source of the ventilation branch meets the demand, and the anesthesia ventilation system can work normally at this time. Specifically, the opening of the flow regulating device can be closed-loop controlled according to the output parameter value fed back in real time by the sensor so that the output parameter value of the ventilation branch reaches the required flow rate and / or pressure and other output parameter values. At this output parameter value, the anesthesia ventilation system can provide sufficient gas for the patient, and the output parameter value is, for example, not less than the control demand threshold. If the output parameter value of the ventilation branch is still less than the control demand threshold when the opening of the flow regulating device reaches the maximum, it is determined that the gas source of the ventilation branch cannot meet the demand, and the anesthesia ventilation system cannot work normally at this time.

[0080] In some embodiments, after the step of determining that the air source of the ventilation branch cannot meet the demand, the method may further include: adjusting the opening of the flow regulating device to the maximum.

[0081] Specifically, when it is determined that the gas source of the ventilation branch cannot meet the demand, the opening of the flow regulating device can be adjusted to the maximum, and the gas source can be waited for to be restored.

[0082] Exemplarily, after the step of adjusting the opening of the flow regulating device to the maximum, the method further includes: detecting the output parameter value of the ventilation branch through the sensor; if the output parameter value of the ventilation branch is not less than the control requirement threshold, determining that the air source of the ventilation branch meets the demand.

[0083] While waiting for the gas source to be restored, the output parameter value of the ventilation branch is kept being detected. When it is detected that the output parameter value of the ventilation branch is not less than the control demand threshold, it can be determined that the restored gas source can meet the demand.

[0084] For example, a demand-satisfied prompt may be output when it is determined that the air source of the ventilation branch meets the demand.

[0085] Exemplarily, the output parameter value of the ventilation branch is detected within a set time to determine whether it is not less than the control requirement threshold. For example, the detection may be performed once or multiple times within the set time. In the case of performing multiple detections within the set time, the multiple detections may be performed according to a preset frequency, a certain pattern, or a set time interval. Here, the set time intervals may be the same time interval or different time intervals.

[0086] If, within the set time, the output parameter values ​​of the detected ventilation branches are all less than the control demand threshold, it is determined that the gas source has not been restored, and a prompt indicating that the gas source cannot meet the demand may be output and / or the flow regulating device may be controlled to be closed.

[0087] In some embodiments, after the step of determining that the air source of the ventilation branch cannot meet the demand, the air source status monitoring method may further include: adjusting the opening of the flow regulating device to a preset target opening.

[0088] Specifically, when the gas source is abnormal, such as when the gas source cannot meet the demand, the gas source is disconnected, or the gas source is not connected, the flow rate or air pressure detected by the sensor is a small value or 0, so that the anesthesia ventilation system cannot operate normally. For example, it is impossible to close the loop and control the opening of the flow regulating device according to the output parameter value fed back by the sensor in real time so that the output parameter value of the ventilation branch reaches the control demand threshold. If the opening of the flow regulating device is still closed-loop controlled according to the output parameter value fed back by the sensor in real time when the gas source cannot meet the demand, the gas source is disconnected, or the gas source is not connected, the opening of the flow regulating device will be adjusted to the maximum. In some embodiments, if the gas source returns to normal, the ventilation branch will supply gas with excessive flow rate or pressure to the patient, causing discomfort.

[0089] Exemplarily, if the opening of the flow regulating device increases to the maximum and the output parameter value of the ventilation branch is less than the control requirement threshold, the opening of the flow regulating device is controlled to be a preset target opening.

[0090] Exemplarily, the preset target opening is smaller than the maximum opening of the flow regulating device.

[0091] For example, the output parameter value corresponding to the preset target opening is the minimum preset output parameter value among multiple preset output parameter values ​​of the flow regulating device. For example, the preset target opening can be the opening F0.

[0092] For example, the opening of the flow regulating device can be controlled to reach a target opening according to a preset target control current. Specifically, when the opening of the flow regulating device reaches the target opening, if the gas source returns to normal, the flow rate or pressure of the gas passing through the ventilation branch does not exceed the flow rate or pressure that would cause discomfort to the patient.

[0093] Exemplarily, the gas source status monitoring method further includes: obtaining calibration data of the opening and output parameter value of the flow regulating device; and determining, based on the calibration data, that the opening corresponding to the target output parameter value is the preset target opening.

[0094] Specifically, the flow control device may include a proportional valve, and the opening of the proportional valve may be controlled by adjusting the current of the proportional valve. For example, calibration data of the control current and output parameter value of the flow control device may be obtained; and the control current corresponding to the target output parameter value may be determined as the target control current based on the calibration data. Controlling the opening of the flow control device to a preset target opening may include controlling the flow control device based on the target control current.

[0095] For example, the opening of the proportional valve increases with increasing control current, specifically according to calibration data, such as a control current-opening curve. If the pressure provided by the gas source is normal and is constant, the corresponding flow rate and / or pressure of the proportional valve increases with increasing control current.

[0096] The target output parameter value may include, for example, a flow rate or pressure that does not cause discomfort to the patient. A target opening can be determined based on the target output parameter value, and a corresponding target control current can be determined based on the target opening and calibration data. When the flow regulating device is controlled by the target control current, the opening of the flow regulating device is the preset target opening.

[0097] Exemplarily, the target output parameter value is the minimum preset output parameter value among a plurality of preset output parameter values ​​of the flow regulating device, and the corresponding preset target opening degree may be the opening degree F0.

[0098] In some embodiments, when the anesthesia ventilation system is in use, the gas source of the ventilation branch may change from normal to abnormal, for example, the gas source becomes insufficient or the gas source is hit and disconnected from the ventilation branch.

[0099] Exemplarily, the gas source status monitoring method further includes determining the opening of the flow control device when the output parameter value reaches or exceeds the control requirement threshold as the preset target opening. For example, when the flow control device is turned on and / or the opening of the flow control device is increased, if it is detected that the current output parameter value reaches or exceeds the control requirement threshold, the opening at that time is saved as the preset target opening.

[0100] Thus, when it is determined that the air source of the ventilation branch has changed from normal to abnormal, the opening of the flow regulating device can be controlled to the preset target opening. Specifically, when the opening of the flow regulating device is at the target opening, if the air source returns to normal, the output parameter value of the ventilation branch can be restored to the control demand threshold, and the flow rate or pressure of the gas passing through the ventilation branch does not exceed the flow rate or pressure that would cause discomfort to the patient.

[0101] In some embodiments, after the step of adjusting the opening of the flow regulating device to a preset target opening, the method further includes: detecting the output parameter value of the ventilation branch by the sensor; based on the relationship between the opening and the output parameter of the flow regulating device when the gas source is normal, if the output parameter value of the ventilation branch is greater than or equal to the output parameter value corresponding to the preset target opening, it is determined that the gas source has returned to normal.

[0102] Exemplarily, the output parameter value of the ventilation branch is detected within a set time to determine whether it is not less than the control requirement threshold. For example, the detection may be performed once or multiple times within the set time. In the case of performing multiple detections within the set time, the multiple detections may be performed according to a preset frequency, a certain pattern, or a set time interval. Here, the set time intervals may be the same time interval or different time intervals.

[0103] For example, after the opening of the flow regulating device is adjusted to the preset target opening Fi, if the output parameter value of the ventilation branch is detected to be greater than or equal to the predetermined parameter output value corresponding to the opening Fi within the set time, it can be determined that the air source of the ventilation branch has returned to normal.

[0104] For example, when it is determined that the gas source has returned to normal, a normal prompt message may be output, such as controlling a green indicator light to light up.

[0105] In some embodiments, as Figure 4 As shown, the gas source status monitoring method includes steps S11 to S23.

[0106] like Figure 4As shown, when the anesthesia ventilation system starts to work, the flow regulating device is controlled at an opening Fi in step S11. Here, i can be 0, 1, …, n - 1, and there can be F0 < F1 < … < Fn - 1. For example, first, the flow regulating device is controlled at a relatively small opening F0, and at the same time, the output parameter value of the ventilation branch is detected by a sensor. Then in step S12, it is judged whether the current output parameter value of the ventilation branch is not less than the preset control requirement threshold. If the output parameter value is less than the control requirement threshold, then in step S13, it is judged whether the opening of the flow regulating device has reached the maximum. If it has not reached the maximum value, then in step S14, the opening of the flow regulating device is adjusted to a larger value; if it is judged in step S13 that the opening of the flow regulating device has reached the maximum, then in step S15, it is determined that the gas source of the ventilation branch is abnormal. Specifically, the gas source abnormality can include that the gas source gas connected to the ventilation branch is insufficient to meet the demand, the gas source connected to the ventilation branch is disconnected, or the ventilation branch is not connected to a gas source. If the detected output parameter value of the ventilation branch is 0, it can be determined that the gas source is disconnected or not connected. If the output parameter value is greater than 0 and less than the control requirement threshold, it is determined that the gas source gas connected to the ventilation branch is insufficient to meet the demand.

[0107] Exemplarily, after it is determined in step S15 that the gas source of the ventilation branch is abnormal, the opening of the flow regulating device can be controlled at a preset target opening in step S16, and then wait for the gas source to return to normal. If the detected output parameter value of the ventilation branch is not less than the control requirement threshold within the set time, it can be determined in step S19 that the gas source has returned to normal, otherwise it is determined that the gas source is still abnormal. Among them, the preset target opening is, for example, the opening F0.

[0108] For example, if it is determined in step S12 that the current output parameter value of the ventilation branch is not less than the preset control requirement threshold, then the current opening of the flow regulating device can be determined as the target opening in step S18, and the gas source of the ventilation branch can be determined to be normal or can meet the demand in step S19. The anesthesia ventilation system can work, for example, according to the output parameter value fed back by the sensor in real time, the opening of the flow regulating device can be closed-loop controlled so that the output parameter value of the ventilation branch reaches the required output parameter value such as flow rate and / or pressure. Specifically, if the output parameter value fed back by the sensor in real time is not less than the theoretical output value corresponding to the current opening of the flow regulating device, that is, the predetermined parameter output value, then the gas source is determined to be normal; if the output parameter value fed back by the sensor in real time is less than the theoretical output value corresponding to the current opening of the flow regulating device and is not less than the control requirement threshold, then it can be determined that the gas source connected to the ventilation branch is insufficient but can meet the demand. In the process of closed-loop controlling the opening of the flow regulating device so that the output parameter value of the ventilation branch reaches the required flow rate and / or pressure, if it is detected in step S20 that the output parameter value of the ventilation branch changes from not less than the control demand threshold to less than the control demand threshold, shows a decreasing trend or drops to zero, then it can be determined in step S21 that the gas source of the ventilation branch has changed from normal or able to meet the demand to the gas source connected to the ventilation branch being insufficient and unable to meet the demand, the gas source connected to the ventilation branch is disconnected, or the ventilation branch is not connected to the gas source.

[0109] For example, if the air source of the ventilation branch is determined to have changed from normal to abnormal in step S21, the flow control device can be controlled at the target opening saved in step S18 in step S22, and then the air source can be waited for to return to normal. If the output parameter value of the ventilation branch detected in step S23 is not less than the control demand threshold within the set time, then in step S19, it is determined that the air source is normal or can meet the demand. Otherwise, it is determined that the air source is insufficient to meet the demand, the air source is disconnected, or the air source is not connected.

[0110] Testing within a set time period may involve performing one or more tests within the set time period. For multiple tests within the set time period, the tests may be performed at a preset frequency, a certain pattern, or at set time intervals. The set time intervals may be the same or different.

[0111] The gas source status monitoring method provided in the embodiment of the present application adjusts the opening of the flow regulating device and detects the output parameter value of the ventilation branch, such as flow rate and / or pressure, through the sensor of the anesthesia ventilation system; when it is detected that the output parameter value of the ventilation branch is less than the predetermined parameter output value, shows a decreasing trend, or drops to zero, it is determined that the gas source of the ventilation branch is abnormal; the flow regulating device and sensor inherent in the anesthesia ventilation system itself are used to identify the gas source connection status, so there is no need to install additional pressure switches for each ventilation branch to detect the gas source supply status of the corresponding branch, thereby saving system costs and reducing system complexity.

[0112] An embodiment of this specification also provides an anesthesia ventilation system.

[0113] For example, Figure 2 FIG. 1 is a schematic structural diagram of an anesthesia ventilation system 10 .

[0114] like Figure 2 As shown, the anesthesia ventilation system 10 includes: an air source interface 11 and at least one ventilation branch 12 connected to the air source interface 11 , and the ventilation branch 12 is provided with a flow regulating device 13 and a sensor 14 .

[0115] Exemplarily, the flow regulating device 13 may include a proportional valve, and the opening of the proportional valve may be controlled by adjusting the current of the proportional valve.

[0116] For example, Figure 3 FIG. 1 is a schematic structural diagram of an anesthesia system 100. The anesthesia system 100 may include an anesthesia control device 110 and / or an auxiliary gas control subsystem 120. The gas source status monitoring method of the aforementioned embodiment may be applied to the anesthesia control device 110 and / or the auxiliary gas control subsystem 120. It is understood that the anesthesia ventilation system 10 may include the anesthesia control device 110 and / or the auxiliary gas control subsystem 120.

[0117] like Figure 3 As shown, the anesthesia control device 110 includes, for example, three gas source interfaces 11 and corresponding three ventilation branches 12. The three gas source interfaces 11 are used to connect an anesthetic gas (such as nitrous oxide) source 101, an oxygen source 102, and an air source 103, respectively.

[0118] Exemplarily, the gas source connected to the gas source interface 11 is provided with a pressure regulator 104 at its outlet, so that the gas source can provide gas of a specific pressure to the ventilation branch 12. The gas source, for example, includes a compressed gas tank and / or a gas supply tube for connecting to hospital oxygen / medical air / nitrous oxide.

[0119] By controlling the opening of the flow regulating devices 13 of the three ventilation branches 12 in the anesthesia control device 110, the proportions of various gases from various gas sources can be mixed to obtain a mixed gas.

[0120] For example, Figure 3 As shown, the anesthesia control device 110 may further include one or more vaporizers 111 for adding an anesthetic medium into the mixed gas.

[0121] Illustratively, the anesthesia control device 110 releases 112 a mixed gas containing an anesthetic medium to the main breathing system 130 through a common output channel.

[0122] The main breathing system 130 can, for example, include a ventilator, a carbon dioxide absorber, an air storage bag, a purification system for removing excess gas, a breathing heating system, a bacterial filter, and / or a humidifier. It will be readily understood by those skilled in the art that the main breathing system 130 according to an embodiment of the present application can be operated in a variety of ventilation modes, such as: pressure controlled ventilation (PCV), pressure support ventilation (PS), synchronized intermittent mandatory ventilation (SIMV), and volume controlled ventilation (CMV). When needed, the main breathing system 130 provides breathable gas and anesthetic media to the patient through a main output, typically through an endotracheal tube or a throat mask airway.

[0123] For example, Figure 3 As shown, the anesthesia system 100 may further include an auxiliary gas control subsystem 120. The auxiliary gas control subsystem 120, for example, includes at least two gas source interfaces 11 and corresponding at least two ventilation branches 12. The two gas source interfaces 11 are respectively used to connect to two of the anesthetic gas (e.g., nitrous oxide) source 101, oxygen source 102, and air source 103.

[0124] The auxiliary gas control subsystem 120 can operate independently of the anesthesia control device 110 and the main breathing system 130 to selectively deliver a separate mixed gas to the patient through the auxiliary output 121. The auxiliary output 121 can be connected to the patient in the following ways, for example, a nasal cannula. Those of ordinary skill in the art will find that the auxiliary output 121 can be connected to the patient through other forms of devices, such as a mask. By integrating the functions of the auxiliary gas control subsystem 120, the gas source, the anesthesia control device 110 and the main breathing system 130, the user can easily and selectively provide approximately 21% (e.g., approximately 100% air) to approximately 100% oxygen through the auxiliary gas output.

[0125] Illustratively, the auxiliary gas control subsystem 120 may provide automatic flow adjustment of either or both gases to achieve a desired oxygen percentage through the auxiliary output 121 .

[0126] Specifically, the anesthesia ventilation system 100 further includes a processor.

[0127] Specifically, the processor may be a micro-controller unit (MCU), a central processing unit (CPU), or a digital signal processor (DSP).

[0128] Illustratively, the flow control device and the sensor are both connected to a processor, which can determine an output parameter value of the ventilation branch where the sensor is located, such as flow rate and / or pressure, based on the electrical signal output by the sensor. The processor can, for example, adjust the flow control device, such as the opening of a proportional valve, by adjusting the control current of the flow control device.

[0129] Wherein, the processor is used to execute the steps of the aforementioned gas source status monitoring method.

[0130] Exemplarily, the processor is configured to run a computer program stored in the memory, and implement the following steps when executing the computer program:

[0131] adjusting the opening of the flow regulating device;

[0132] Detecting an output parameter value of the ventilation branch by the sensor, wherein the output parameter value includes flow rate and / or pressure;

[0133] If it is detected that the output parameter value of the ventilation branch is less than the predetermined parameter output value, shows a decreasing trend, or drops to zero, it is determined that the air source of the ventilation branch is abnormal.

[0134] The specific principles and implementation methods of the anesthesia ventilation system provided in the embodiments of this specification are similar to the gas source status monitoring method of the aforementioned embodiments and will not be repeated here.

[0135] Another embodiment of the present specification further provides an anesthesia machine, which includes the above-mentioned anesthesia ventilation system. The units included in the anesthesia ventilation system and the implementation method are as described above and will not be repeated here.

[0136] It should be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the specification.

[0137] It will also be understood that the term "and / or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0138] The above description is merely a specific embodiment of this specification, but the scope of protection of this specification is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or replacements within the technical scope disclosed in this specification, and such modifications or replacements should be included in the scope of protection of this specification. Therefore, the scope of protection of this specification should be based on the scope of protection of the claims.

Claims

1. A method for monitoring the gas source status of an anesthesia ventilation system, characterized in that: The anesthesia ventilation system comprises: a plurality of gas source interfaces and at least one ventilation branch connected to each of the gas source interfaces, wherein the ventilation branch is provided with a flow regulating device and a sensor, and gases provided by the gas sources connected to the plurality of gas source interfaces are mixed through the respective ventilation branches to obtain a mixed gas, wherein the gas source is an anesthetic gas source, an oxygen gas source or an air gas source; When the anesthesia ventilation system starts working, the method includes: adjusting the opening of the flow regulating device on at least one of the ventilation branches so that the gas source connected to at least one of the ventilation branches outputs gas; Detecting an output parameter value of the ventilation branch by the sensor, wherein the output parameter value includes flow rate and / or pressure; If it is detected that the output parameter value of the ventilation branch is less than the predetermined parameter output value corresponding to the opening of the flow regulating device, shows a decreasing trend, or drops to zero, it is determined that the air source of the ventilation branch is abnormal.

2. The method according to claim 1, characterized in that The predetermined parameter output value is equal to the control requirement threshold, and if it is detected that the output parameter value of the ventilation branch is less than the predetermined parameter output value, the step of determining that the air source of the ventilation branch is abnormal includes: The opening of the flow regulating device is increased to a maximum opening. If the output parameter value of the ventilation branch is less than the control demand threshold, it is determined that the air source of the ventilation branch cannot meet the demand.

3. The method according to claim 1, characterized in that The predetermined parameter output value is a theoretical output value corresponding to the current opening of the flow regulating device when the gas source is normal.

4. The method according to claim 1, wherein After determining that the air source of the ventilation branch is abnormal, the method further includes: The opening of the flow regulating device is increased to a maximum opening. If the output parameter value of the ventilation branch is less than the control demand threshold, it is determined that the air source of the ventilation branch cannot meet the demand.

5. The method according to claim 2 or 4, characterized in that The step of increasing the opening of the flow regulating device to a maximum opening comprises: Gradually increase the opening of the flow regulating device, or adjust the opening of the flow regulating device to the maximum opening.

6. The method according to claim 2 or 4, characterized in that After the step of determining that the air source of the ventilation branch cannot meet the demand, the method further includes: Adjust the opening of the flow regulating device to the maximum.

7. The method according to claim 6, characterized in that After the step of adjusting the opening of the flow regulating device to the maximum, the method further includes: detecting an output parameter value of the ventilation branch by the sensor; If the output parameter value of the ventilation branch is not less than the control demand threshold, it is determined that the air source of the ventilation branch meets the demand.

8. The method according to claim 7, characterized in that After the step of adjusting the opening of the flow regulating device to the maximum, detecting the output parameter value of the ventilation branch by the sensor within a set time, if the output parameter value of the ventilation branch is less than the control requirement threshold, the method further includes: If the output gas source cannot meet the demand, the flow regulating device is prompted and / or controlled to be closed.

9. The method according to claim 2 or 4, characterized in that After the step of determining that the air source of the ventilation branch cannot meet the demand, the method further includes: The opening of the flow regulating device is adjusted to a preset target opening.

10. The method according to claim 9, characterized in that After the step of adjusting the opening of the flow regulating device to a preset target opening, the method further includes: detecting an output parameter value of the ventilation branch by the sensor; According to the relationship between the opening and the output parameter value of the flow regulating device when the gas source is normal, if the output parameter value of the ventilation branch is greater than or equal to the theoretical output value corresponding to the preset target opening, it is determined that the gas source has returned to normal.

11. The method according to any one of claims 1 to 4, characterized in that The gas source abnormality includes: the gas source connected to the ventilation branch is insufficient but can meet the demand, the gas source is insufficient and cannot meet the demand, the gas source connected to the ventilation branch is disconnected, or the ventilation branch is not connected to the gas source.

12. An anesthesia ventilation system, characterized in that: include: The anesthesia ventilation system comprises: a plurality of gas source interfaces and at least one ventilation branch connected to each of the gas source interfaces, wherein the ventilation branch is provided with a flow regulating device and a sensor, and gases provided by the gas sources connected to the plurality of gas source interfaces are mixed through the respective ventilation branches to obtain a mixed gas, wherein the gas source is an anesthetic gas source, an oxygen gas source or an air gas source; The anesthesia ventilation system further comprises a processor configured to execute the method according to any one of claims 1 to 11.

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