A respiratory ventilation system and method

Abstract

A respiratory ventilation system comprises: an air source interface (1), an inspiratory branch (2), a high-frequency inspiratory valve (3), a ventilation control device (4) and an active exhalation device (5); the inspiratory branch (2) is respectively connected to the air source interface (1) and a patient pipeline connected to a patient's respiratory system; the high-frequency inspiratory valve (3) generates high-frequency oscillations in the air in the inspiratory branch (2); the ventilation control device (4) is connected to the inspiratory branch (2), the high-frequency inspiratory valve (3) and the active exhalation device (5); in the inspiratory phase, the high-frequency inspiratory valve (3) is controlled to generate high-frequency oscillations in the air in the inspiratory branch (2) according to a preset high-frequency oscillation frequency, and the high-frequency oscillation gas generated by the high-frequency inspiratory valve (3) is output through the inspiratory branch (2) and the patient pipeline; in the exhalation phase, the active exhalation device (5) is controlled to actively extract the gas exhaled by the patient through the patient pipeline according to the preset high-frequency oscillation frequency. The system is small in size and can reduce gas consumption and noise.

Description

Technical Field

[0001] The present invention relates to the field of medical device technology, and in particular to a respiratory ventilation system and method. Background Technology

[0002] Respiratory distress and failure are major factors affecting the survival rate of newborns, especially premature infants. In some cases, traditional ventilation methods are not effective in supporting respiratory function in newborns because the high airway pressure provided by these methods may lead to lung injury. In such cases, high-frequency oscillatory ventilation can be used to provide respiratory support.

[0003] High-frequency oscillatory ventilation (HFOV) has three basic characteristics: a respiratory rate of 3-50 Hz, a tidal volume close to the patient's physiological dead space, and active inhalation and exhalation. Unlike traditional ventilation methods that only exchange gas during inhalation and rely on physiological responses during exhalation, HFOV enables active exhalation. During exhalation, the machine generates a negative force to assist the patient's breathing, which is crucial for newborns or patients with other lung diseases. Furthermore, the ventilation parameters of HFOV include oxygen concentration, mean pressure, frequency, amplitude, and respiratory ratio, which can be set and adjusted according to the patient's condition and treatment needs.

[0004] Currently, high-frequency oscillatory ventilation devices, such as high-frequency oscillatory ventilators, implement high-frequency oscillatory ventilation in two ways. One method utilizes an oscillating diaphragm similar to a loudspeaker, where the movement of the diaphragm controls active inhalation and exhalation. A motor drives the diaphragm to control the movement stroke and frequency. However, this method results in a large device size, requiring a larger oscillation amplitude, and it is difficult to combine traditional ventilation with high-frequency ventilation. Another method uses a solenoid valve to achieve active inhalation and a Venturi negative pressure suction device to achieve active exhalation. However, Venturi negative pressure requires high-pressure gas to drive, resulting in high noise and excessive gas consumption. Summary of the Invention

[0005] To address the aforementioned technical problems, embodiments of the present invention aim to provide a respiratory ventilation system and method that utilizes an active exhalation device to extract the patient's exhaled air to generate active exhalation, thereby supporting a high-frequency ventilation mode. This not only results in a smaller system size but also reduces gas consumption and noise.

[0006] The technical solution of this invention can be implemented as follows:

[0007] This invention provides a respiratory ventilation system, which includes: a gas source interface, an inspiratory branch, a high-frequency inspiratory valve, a ventilation control device, and an active exhalation device;

[0008] The inspiratory branch is connected to the air source interface and the patient tubing connected to the patient's respiratory system, respectively.

[0009] The high-frequency intake valve generates high-frequency oscillations in the gas of the intake branch.

[0010] The ventilation control device is connected to the inspiratory branch, the high-frequency inspiratory valve, and the active exhalation device. During the inhalation phase, the high-frequency inspiratory valve is controlled to generate high-frequency oscillations in the gas of the inspiratory branch according to a preset high-frequency oscillation frequency, and the high-frequency oscillating gas generated by the high-frequency inspiratory valve is output through the inspiratory branch and the patient tubing. During the exhalation phase, the active exhalation device is controlled to actively draw in the gas exhaled by the patient through the patient tubing according to the preset high-frequency oscillation frequency.

[0011] In the above-mentioned respiratory ventilation system, the active exhalation device includes: a high-frequency valve and / or an electric gas extraction device;

[0012] The respiratory ventilation system also includes an expiratory branch, which is connected to the patient tubing to expel the patient's exhaled air.

[0013] The active exhalation device is installed in the inhalation branch or the exhalation branch.

[0014] In the above-mentioned respiratory ventilation system, the high-frequency valve is a switching valve or a proportional valve.

[0015] In the above-mentioned respiratory ventilation system, the ventilation control device is also used to control the active expiratory device to shut down, so as to expel the gas exhaled by the patient through the patient tubing via the expiratory branch.

[0016] In the above-mentioned respiratory ventilation system, the ventilation control device controls the opening of the high-frequency valve during the exhalation phase, and controls the opening size of the high-frequency valve and the extraction power of the electric gas extraction device according to the preset high-frequency oscillation frequency, so as to actively extract the gas exhaled by the patient through the patient tubing.

[0017] Alternatively, the opening size of the high-frequency valve can be adjusted according to the preset high-frequency oscillation frequency to actively extract the gas exhaled by the patient through the patient tubing;

[0018] Alternatively, the extraction power of the electric gas extraction device can be adjusted according to the preset high-frequency oscillation frequency to actively extract the gas exhaled by the patient through the patient tubing.

[0019] In the above-mentioned respiratory ventilation system, the air source interface includes a first air source interface and a second air source interface, and the inspiratory branch includes a first inspiratory branch, a second inspiratory branch, and a third inspiratory branch.

[0020] The outlet of the first air supply branch and the outlet of the second air supply branch are respectively connected to the inlet of the third air supply branch.

[0021] The outlet of the third gas supply branch is connected to the patient's tubing;

[0022] The air inlet of the first air supply branch is connected to the first air source interface;

[0023] The air inlet of the second air supply branch is connected to the second air source interface.

[0024] In the above-mentioned respiratory ventilation system, the first air delivery branch includes a first inspiratory one-way valve and a first flow regulating valve connected in sequence, the second air delivery branch includes a second inspiratory one-way valve and a second flow regulating valve connected in sequence, and the third air delivery branch includes a third inspiratory one-way valve.

[0025] The first intake check valve is connected to the first air source interface, and the second intake check valve is connected to the second air source interface.

[0026] In the above-mentioned respiratory ventilation system, the high-frequency inspiratory valve is sequentially connected to the third inspiratory one-way valve;

[0027] The first flow regulating valve and the second flow regulating valve are respectively connected to the high-frequency intake valve.

[0028] In the above-mentioned respiratory ventilation system, the high-frequency inspiratory valve consists of the first flow regulating valve and the second flow regulating valve.

[0029] In the above-mentioned respiratory ventilation system, the ventilation control device controls the active exhalation device to work in conjunction with the high-frequency inhalation valve to achieve control of the mean airway pressure.

[0030] In the above-mentioned respiratory ventilation system, the high-frequency inspiratory valve is a high-frequency inspiratory valve.

[0031] In the above-mentioned respiratory ventilation system, the high-frequency inhalation valve is any one of a proportional solenoid valve, a shut-off valve, a servo valve, and a turbine.

[0032] In the above-mentioned respiratory ventilation system, the active expiratory device is connected to the outlet of the third inspiratory one-way valve, or to the expiratory branch.

[0033] This application provides a respiratory ventilation method applied to the above-mentioned respiratory ventilation system, characterized in that the method includes:

[0034] During the inhalation phase, the ventilation control device controls the high-frequency inhalation valve to generate high-frequency oscillation of the gas in the inhalation branch according to the preset high-frequency oscillation frequency, and the generated high-frequency oscillating gas is delivered to the patient through the inhalation branch and the patient tubing.

[0035] During the exhalation phase, the ventilation control device controls the active exhalation device to actively extract the gas exhaled by the patient through the patient tubing at the preset high-frequency oscillation frequency.

[0036] In the above-described ventilation method, the active expiratory device includes: a high-frequency valve and / or an electric gas extraction device. During the expiratory phase, the ventilation control device controls the active expiratory device to actively extract the gas exhaled by the patient through the patient tubing according to the preset high-frequency oscillation frequency, including:

[0037] During the exhalation phase, the ventilation control device controls the opening of the high-frequency valve, and controls the opening size of the high-frequency valve and the extraction power of the electric gas extraction device according to the preset high-frequency oscillation frequency, so as to actively extract the gas exhaled by the patient through the patient tubing.

[0038] Alternatively, the ventilation control device can adjust the opening size of the high-frequency valve according to the preset high-frequency oscillation frequency to actively extract the gas exhaled by the patient through the patient tubing.

[0039] Alternatively, the ventilation control device can adjust the extraction power of the electric gas extraction device according to the preset high-frequency oscillation frequency to actively extract the gas exhaled by the patient through the patient tubing.

[0040] In the above-described breathing and ventilation method, the method further includes:

[0041] The ventilation control device controls the active exhalation device to work in conjunction with the high-frequency inhalation valve to control the mean airway pressure.

[0042] This invention provides a respiratory ventilation system, comprising: a gas source interface, an inspiratory branch, a high-frequency inspiratory valve, a ventilation control device, and an active expiratory device; the inspiratory branch is connected to the gas source interface and a patient tubing connected to the patient's respiratory system; the high-frequency inspiratory valve generates high-frequency oscillations in the gas of the inspiratory branch; the ventilation control device is connected to the inspiratory branch, the high-frequency inspiratory valve, and the active expiratory device. During the inspiratory phase, the high-frequency inspiratory valve is controlled to generate high-frequency oscillations in the gas of the inspiratory branch according to a preset high-frequency oscillation frequency, and the high-frequency oscillating gas generated by the high-frequency inspiratory valve is output through the inspiratory branch and the patient tubing; during the expiratory phase, the active expiratory device is controlled to actively draw in the gas exhaled by the patient through the patient tubing according to a preset high-frequency oscillation frequency. The respiratory ventilation system provided by this invention utilizes the active expiratory device to draw in the patient's exhaled gas to generate active exhalation, supporting a high-frequency ventilation mode. This not only results in a smaller system size but also reduces gas consumption and noise. Attached Figure Description

[0043] Figure 1 A schematic diagram of a respiratory ventilation system provided in an embodiment of the present invention. Figure 1 ;

[0044] Figure 2 A schematic diagram of a respiratory ventilation system provided in an embodiment of the present invention. Figure 2 ;

[0045] Figure 3 A schematic diagram of a respiratory ventilation system provided in an embodiment of the present invention. Figure 3 ;

[0046] Figure 4 A schematic diagram of a respiratory ventilation system provided in an embodiment of the present invention. Figure 4 ;

[0047] Figure 5 A schematic diagram of a respiratory ventilation system provided in an embodiment of the present invention. Figure 5 ;

[0048] Figure 6 This is a schematic flowchart of a respiratory ventilation method provided in an embodiment of the present invention;

[0049] Figure 7 A detailed control diagram of an exemplary ventilation control device provided for an embodiment of the present invention;

[0050] Figure 8 This is a schematic diagram of the control flow of an exemplary ventilation control device provided in an embodiment of the present invention. Detailed Implementation

[0051] To gain a more detailed understanding of the features and technical content of the embodiments of the present invention, the implementation of the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for reference and illustration only and are not intended to limit the embodiments of the present invention.

[0052] This invention provides a respiratory ventilation system. Figure 1 A schematic diagram of a respiratory ventilation system provided in an embodiment of the present invention. Figure 1 .like Figure 1 As shown, the respiratory ventilation system mainly includes: gas source interface 1, inspiratory branch 2, high-frequency inspiratory valve 3, ventilation control device 4 (not shown in the figure) and active exhalation device 5;

[0053] Inspiratory branch 2 is connected to air source interface 1 and patient tubing connected to the patient's respiratory system, respectively.

[0054] The high-frequency intake valve 3 generates high-frequency oscillations in the gas of the intake branch 2;

[0055] The ventilation control device 4 is connected to the inspiratory branch 2, the high-frequency inspiratory valve 3, and the active exhalation device 5. During the inspiratory phase, the high-frequency inspiratory valve 3 is controlled to generate high-frequency oscillation of the gas in the inspiratory branch 2 according to a preset high-frequency oscillation frequency, and the high-frequency oscillating gas generated by the high-frequency inspiratory valve 3 is output through the inspiratory branch 2 and the patient tubing. During the exhalation phase, the active exhalation device 5 is controlled to actively draw in the gas exhaled by the patient through the patient tubing according to a preset high-frequency oscillation frequency.

[0056] It should be noted that, in the embodiments of the present invention, the inspiratory branch 2 of the respiratory ventilation system is used to provide a gas delivery path during the inspiratory phase.

[0057] It should be noted that, in the embodiments of the present invention, as... Figure 1 As shown, the high-frequency intake valve 3 can be a high-frequency intake valve. Specifically, the high-frequency intake valve can be any one of a proportional solenoid valve, a shut-off valve, a servo valve, and a turbine. Of course, the high-frequency intake valve 3 can also be other devices that can realize high-frequency gas oscillation, and this embodiment of the invention is not limited thereto.

[0058] It should be noted that, in the embodiments of the present invention, medical personnel can determine the preset high-frequency oscillation frequency according to the patient's actual ventilation needs. The specific preset high-frequency oscillation frequency can be 3-50Hz, and the embodiments of the present invention do not limit it.

[0059] It is understood that, in the embodiments of the present invention, the high-frequency inspiratory valve 3 is located in the inspiratory branch 2, and the ventilation control device 4 is connected to the inspiratory branch 2 and the high-frequency inspiratory valve 3. Thus, during the inspiratory phase, the ventilation control device 4 can control the high-frequency inspiratory valve 3 to generate high-frequency oscillations in the gas of the inspiratory branch 2 according to a preset high-frequency oscillation frequency. Subsequently, since the inspiratory branch 2 is also connected to the patient tubing, the high-frequency oscillating gas generated by the high-frequency inspiratory valve 3 will flow through the inspiratory branch and be delivered to the patient from the patient tubing, achieving high-frequency inspiration for the patient.

[0060] It is understood that, in the embodiments of the present invention, the ventilation control device 4 is also connected to the active exhalation device 5, so that during the exhalation phase, the active exhalation device 5 is controlled to actively extract the patient's exhaled gas according to a preset high-frequency oscillation frequency, thereby realizing active exhalation.

[0061] Specifically, in embodiments of the present invention, such as Figure 1 and Figure 2 As shown, the active exhalation device 5 includes: a high-frequency valve 51 and / or an electric gas extraction device 52; the respiratory ventilation system also includes an expiratory branch 6, which is connected to the patient tubing to expel the gas exhaled by the patient; the active exhalation device is installed on the inspiratory branch 2 or the expiratory branch 6.

[0062] It is understood that, in embodiments of the present invention, the respiratory ventilation system further includes an expiratory branch 6. The expiratory branch 6 is used to provide an expiratory pathway during the expiratory phase.

[0063] It should be noted that, in the embodiments of the present invention, the high-frequency valve 51 included in the active exhalation device 5 can be an on / off valve or a proportional valve, etc. The electric gas extraction device 52 can be a turbine or other similar device. During the exhalation phase, the ventilation control device 4 can control the turbine to rotate based on a preset high-frequency oscillation frequency. By controlling the rotational speed of the turbine, the negative force can be controlled, generating active exhalation. The turbine actively extracts the patient's exhaled gas, generating active exhalation. The specific high-frequency valve 51 and electric gas extraction device 52 can be selected according to the actual situation, and the embodiments of the present invention are not limited thereto.

[0064] In the embodiment of the present invention, Figure 1 As shown, the active exhalation device 5 can be installed on the expiratory branch 6 of the respiratory ventilation system. For example... Figure 2 As shown, the active exhalation device 5 can also be installed on the inspiratory branch 2 of the respiratory ventilation system. Furthermore, as... Figure 1 and Figure 2As shown, the active exhalation device includes not only a high-frequency valve 51 and an electric gas extraction device 52, but also an exhalation filter 53. During the exhalation phase, the ventilation control device 4 can control the opening of the high-frequency valve 51 and control the electric gas extraction device 52, such as the turbine speed, by adjusting the current or voltage, thereby extracting the patient's exhaled gas through the exhalation filter 53. Furthermore, the ventilation control device 4 can also control the opening of the exhalation valve in the expiratory branch 6, simultaneously expelling air, thus assisting the electric gas extraction device 52 in expelling air.

[0065] It should be noted that, in the embodiments of the present invention, depending on different actual situations, active exhalation can be achieved by only opening the high-frequency valve 51, active exhalation can be achieved by only using the electric gas extraction device 52, or active exhalation can be achieved by using both the high-frequency valve 51 and the electric gas extraction device 52. The embodiments of the present invention do not limit this.

[0066] Specifically, in an embodiment of the present invention, the ventilation control device 4 controls the high-frequency valve 51 to open during the exhalation phase, and controls the opening size of the high-frequency valve 51 and the extraction power of the electric gas extraction device 52 according to a preset high-frequency oscillation frequency, so as to actively extract the gas exhaled by the patient through the patient tube.

[0067] Alternatively, the opening size of the high-frequency valve 51 can be adjusted according to the preset high-frequency oscillation frequency to actively extract the gas exhaled by the patient through the patient tube.

[0068] Alternatively, the extraction power of the electric gas extraction device 52 can be adjusted according to the preset high-frequency oscillation frequency to actively extract the gas exhaled by the patient through the patient tubing.

[0069] It should be noted that, in the embodiments of the present invention, when the high-frequency valve 51 is a proportional valve, the ventilation control device 4 can control the opening size of the proportional valve by adjusting the current or voltage according to preset relevant parameters and the actual needs of active exhalation. For example, during the exhalation phase, when the preset high-frequency oscillation frequency adjustment requires a rapid decrease in airway pressure, the ventilation control device 4 can use a faster valve opening control speed; when a larger negative pressure is required for the airway pressure, the ventilation control device 4 can adjust the opening of the proportional valve to be larger. Furthermore, when the set low-pressure value of the oscillation is insufficient to activate the electric gas extraction device 52, the ventilation control device 4 can adjust the opening size of the proportional valve according to the magnitude of the low-pressure value. In some cases, the ventilation control device 4 needs to reduce the opening of the proportional valve to meet the ventilation setting requirements.

[0070] It should be noted that, in the embodiments of the present invention, when the high-frequency valve 51 and the electric gas extraction device 52 are combined to achieve active exhalation according to a preset high-frequency oscillation frequency, if the high-frequency valve 51 is a proportional valve, since the electric gas extraction device 52, such as a turbine, has a slow adjustment response, the opening size of the proportional valve can also be adjusted to take advantage of its short response time and fast reaction, thereby quickly reaching the required pressure. Furthermore, the adjustment resolution of a proportional valve is generally higher than that of a turbine, enabling more precise ventilation control.

[0071] It should be noted that since the high-frequency valve 51 is composed of a fixed hole structure, the ventilation control device 4 cannot control its opening and closing and the size of its opening. Therefore, when the ventilation control device 4 controls the active exhalation device 5 to achieve active exhalation, the exhalation valve will continuously assist in exhalation.

[0072] It should be noted that, in the embodiments of the present invention, when the high-frequency valve 51 is a switching valve, the ventilation control device 4 cannot adjust its opening size, and when the electric gas extraction device 52 does not need to be started, the magnitude of the oscillating low pressure value cannot be controlled.

[0073] It should be noted that, in the embodiments of the present invention, the active exhalation device 5 may not include the high-frequency valve 51, but only the electric gas extraction device 52. During the inhalation phase, the ventilation control device 4 can adjust the speed or rotation direction of the electric gas extraction device 52, such as the turbine, to minimize gas leakage from the electric gas extraction device 52.

[0074] Specifically, in an embodiment of the present invention, the ventilation control device 4 is also used to control the active exhalation device 5 to shut down so as to expel the gas exhaled by the patient through the patient tubing via the exhalation branch 6.

[0075] It should be noted that, in the embodiments of the present invention, as... Figure 1 and Figure 2 As shown, the expiratory branch 6 may include an expiratory flow sensor 61, an expiratory valve 62, and an expiratory check valve 63. The expiratory flow sensor 61 is connected to the patient tubing and is used to monitor the flow rate and tidal volume of the patient's exhaled air. The expiratory valve 62 is connected to the expiratory flow sensor 61 and is used to control the end-expiratory pressure of the patient's exhaled air to prevent alveolar collapse after exhalation. The expiratory check valve 63 is connected to the expiratory valve 62 and is used to prevent air from entering through the expiratory branch.

[0076] It should be noted that, in the embodiments of the present invention, during the expiratory phase, when conventional frequency ventilation is used, the ventilation control device 4 controls the high-frequency valve 51 to close, and the patient's exhaled gas passes through the expiratory flow sensor 61 of the expiratory branch 6 and is discharged through the expiratory valve 62.

[0077] It is understood that, in the embodiments of the present invention, the patient's actual condition may not require active exhalation during the exhalation phase. Therefore, the ventilation control device 4 can also control the active exhalation device 5 to be turned off during the exhalation phase, so that the gas exhaled by the patient from the patient tubing can be discharged through the exhalation branch 6.

[0078] In embodiments of the present invention, such as Figure 1 and Figure 2 As shown, the air source interface 1 includes a first air source interface 11 and a second air source interface 12, and the intake branch 2 includes a first air supply branch 21, a second air supply branch 22, and a third air supply branch 23.

[0079] The outlet of the first air supply branch 21 and the outlet of the second air supply branch 22 are respectively connected to the inlet of the third air supply branch 23.

[0080] The outlet of the third gas supply branch 23 is connected to the patient's tubing;

[0081] The air inlet of the first air supply branch 21 is connected to the first air source interface 11;

[0082] The air inlet of the second air supply branch 22 is connected to the second air source interface 12.

[0083] It should be noted that, in the embodiments of the present invention, as... Figure 1 and Figure 2 As shown, the first gas source interface 11 is used to connect to an oxygen gas source, and the second gas source interface 12 is used to connect to an air gas source. Of course, the first gas source interface 11 can also be used to connect to an air gas source, and the second gas source interface 12 can be used to connect to an oxygen gas source. This embodiment of the invention is not limited to this.

[0084] Specifically, in embodiments of the present invention, such as Figure 1 and Figure 2 As shown, the first air supply branch 21 includes a first intake check valve 211 and a first flow regulating valve 212 connected in sequence; the second air supply branch 22 includes a second intake check valve 221 and a second flow regulating valve 222 connected in sequence; and the third air supply branch 23 includes a third intake check valve 231.

[0085] The first intake check valve 211 is connected to the first air source interface 11, and the second intake check valve 221 is connected to the second air source interface 12.

[0086] It should be noted that, in the embodiments of the present invention, as... Figure 1 and Figure 2As shown, the first air supply branch 21 may include not only a first intake check valve 211 and a first flow regulating valve 212, but also a first filter 213, a first pressure sensor 214, a first pressure regulating valve 215, a second filter 216, and a first flow sensor 217. Furthermore, the second air supply branch may include not only a second intake check valve 221 and a second flow regulating valve 222, but also a third filter 223, a second pressure sensor 224, a second pressure regulating valve 225, a fourth filter 226, and a second flow sensor 227.

[0087] Specifically, in embodiments of the present invention, such as Figure 1 and Figure 2 As shown, in the first gas supply branch 21, the first filter 213 is connected to the first gas source interface 11 to prevent impurities from flowing downstream of the gas passage and protect downstream devices. The first pressure sensor 214 is connected to the first filter 213 to monitor the pressure of the oxygen input to the first gas source interface 11, thereby triggering an alarm when the pressure exceeds the maximum threshold or falls below the minimum threshold. The first intake check valve 211 is connected to the first pressure sensor 214 to prevent air from entering the branch, and, when only the second gas supply branch 22 is open, it can prevent reverse leakage of air entering the second gas supply branch 22. The first pressure regulating valve 215 is connected to the first intake check valve 211 to stabilize the pressure of the gas source input and ensure accurate control of downstream flow and pressure. The first flow regulating valve 212 is connected to the first pressure regulating valve 215 to regulate and control the oxygen flow rate. The second filter 216 is connected to the first flow regulating valve 212 and the first flow sensor 217. The second filter is used to further purify the input oxygen, protect the downstream first flow sensor 217 for accurate measurement of oxygen flow, and also play a role in stabilizing the flow rate.

[0088] Specifically, in embodiments of the present invention, such as Figure 1 and Figure 2As shown, in the second air supply branch 22, the third filter 223 is connected to the second air source interface 12 to prevent impurities from flowing downstream of the gas passage and protect downstream devices. The second pressure sensor 224 is connected to the third filter 223 to monitor the pressure of the air input to the second air source interface 12, thereby triggering an alarm when the pressure exceeds the maximum threshold or falls below the minimum threshold. The second intake check valve 221 is connected to the second pressure sensor 224 to prevent oxygen from entering the branch, and, when only the first air supply branch 21 is open, it can prevent reverse leakage of oxygen entering the first air supply branch 21. The second pressure regulating valve 225 is connected to the second intake check valve 221 to stabilize the pressure of the air source input and ensure accurate control of downstream flow and pressure. The second flow regulating valve 222 is connected to the second pressure regulating valve 225 to regulate and control the air flow. The fourth filter 226 is connected to the second flow regulating valve 222 and the second flow sensor 227. The fourth filter 226 is used to further purify the input air, protect the downstream second flow sensor 227 for accurate measurement of oxygen flow, and also play a role in stabilizing the flow rate.

[0089] It is understood that, in the embodiments of the present invention, the first flow regulating valve 212 and the second flow regulating valve 222 respectively control the flow rate of oxygen and air, so that oxygen and air are mixed in the third gas supply branch 23 to obtain a mixed gas, thereby achieving control of the oxygen concentration in the mixed gas to meet the ventilation needs of different patients.

[0090] It should be noted that, in the embodiments of the present invention, as... Figure 1 and Figure 2 As shown, the high-frequency intake valve 3 is connected to the third air supply branch 23. The third air supply branch 23 includes not only the third intake check valve 231, but may also include a safety valve 232 and a humidifier 233.

[0091] Specifically, in embodiments of the present invention, such as Figure 1 and Figure 2 As shown, the high-frequency intake valve 3 is sequentially connected to the third intake check valve 231, and the first flow regulating valve 212 and the second flow regulating valve 222 can be connected to the high-frequency intake valve 3 respectively. In this application, the connection includes direct connection and indirect connection. The first flow regulating valve 212 and the second flow regulating valve 222 can be directly connected to the high-frequency intake valve 3 respectively. Of course, the first flow regulating valve 212 and the second flow regulating valve 222 can also be indirectly connected to the high-frequency intake valve 3 respectively. For example, the first flow regulating valve 212 can be indirectly connected to the high-frequency intake valve 3 via the second filter 216 and / or the first flow sensor 217; the second flow regulating valve 222 can be indirectly connected to the high-frequency intake valve 3 via the fourth filter 226 and / or the second flow sensor 227.

[0092] It should be noted that, in the embodiments of the present invention, as... Figure 1 and Figure 2 As shown, in the third air delivery branch 23, the high-frequency inspiratory valve 3 can be used to regulate the flow rate of the oxygen and air mixture, controlling the airway pressure based on the output mixed gas flow rate. The airway pressure is monitored by the proximal pressure sensor 7. The third inspiratory one-way valve 231 is connected to the high-frequency inspiratory valve 3 to prevent exhaled gas from entering the high-frequency inspiratory valve 3 and its upstream components in the third air delivery branch 23 during the expiratory phase. The safety valve 232 is connected to the third inspiratory one-way valve 231 and opens when the pressure of the mixed gas reaches the maximum set value during inhalation, allowing gas to escape and relieving pressure. Furthermore, if the expiratory branch and the active expiratory device 5 malfunction during the expiratory phase, preventing normal exhalation, the safety valve 232 can also be opened to expel the exhaled gas. If insufficient mixed gas is delivered to the front end of the safety valve 232 in the third air delivery branch 23, the safety valve 232 can be switched to atmospheric air to compensate for the deficiency. The humidifier 233 is connected to the safety valve 232, which can heat and humidify the supplied mixed gas, control the temperature and humidity of the mixed gas, and thus ensure the patient's comfort during inhalation.

[0093] Figure 3 A schematic diagram of a respiratory ventilation system provided in an embodiment of the present invention. Figure 3 . Figure 4 A schematic diagram of a respiratory ventilation system provided in an embodiment of the present invention. Figure 4 .like Figure 3 and Figure 4 As shown, in an embodiment of the present invention, the high-frequency intake valve 3 may be composed of a first flow regulating valve 212 and a second flow regulating valve 222.

[0094] It should be noted that, in the embodiments of the present invention, as... Figure 3 and Figure 4 As shown, when the first flow regulating valve 212 and the second flow regulating valve 222 form a high-frequency inhalation valve, that is, when the ventilation control device 4 is connected to the first flow regulating valve 212 and the second flow regulating valve 222, the ventilation control device 4 can control the first flow regulating valve 212 and the second flow regulating valve 222 according to the preset high-frequency oscillation frequency, so that the gas in the corresponding gas delivery branch generates high-frequency oscillation. Furthermore, the two gases are mixed in the third gas delivery branch and finally delivered to the patient through the patient tubing.

[0095] It should be noted that, in the embodiments of the present invention, as... Figures 1 to 4As shown, a proximal pressure sensor 7 can be installed on the patient tubing to monitor the proximal pressure of the patient in real time and feed it back to the ventilation control device 4 for relevant control.

[0096] It should be noted that, in the embodiments of the present invention, as... Figure 1 and Figure 3 As shown, the active exhalation device 5 is specifically connected to the exhalation branch 6. Furthermore, as... Figure 2 and Figure 4 As shown, the active exhalation device 5 can also be connected to the outlet of the third inhalation check valve 231.

[0097] Specifically, in an embodiment of the present invention, the ventilation control device 4 controls the active exhalation device 5 and the high-frequency inhalation valve 3 to work together to achieve control of the mean airway pressure.

[0098] Understandably, in the embodiments of the present invention, during the inhalation phase, the ventilation control device 4 controls the high-frequency inhalation valve 3 to rapidly adjust according to a preset high-frequency oscillation frequency, causing the gas in the inhalation branch 2 to oscillate at a high frequency, thereby controlling the peak pressure of each cycle. Furthermore, during the inhalation phase, the ventilation control device 4 can also control the active exhalation device 5 to operate, extracting a portion of the gas from the inhalation branch 2, thereby controlling the average airway pressure to reach a preset state. The proximal pressure sensor 7 can monitor the pressure and provide timely feedback to the ventilation control device 4, which then controls the active exhalation device 5 to extract gas based on the feedback pressure.

[0099] It should be noted that, in the embodiments of the present invention, the ventilation control device 4 can also simultaneously control the expiratory valve 62 of the active expiratory device 5 and the expiratory branch 6, and work in conjunction with the high-frequency inspiratory valve 3 to control the mean airway pressure.

[0100] Figure 5 A schematic diagram of a respiratory ventilation system provided in an embodiment of the present invention. Figure 5 .like Figure 5 As shown, in the embodiments of the present invention, the respiratory ventilation system may not include the expiratory branch 6. The active expiratory device 5 can not only realize the active expiratory function, but also realize the passive expiratory function of the expiratory branch 6 under the control of the ventilation control device 4. The embodiments of the present invention are not limited.

[0101] This invention provides a respiratory ventilation system, comprising: a gas source interface, an inspiratory branch, a high-frequency inspiratory valve, a ventilation control device, and an active expiratory device; the inspiratory branch is connected to the gas source interface and a patient tubing connected to the patient's respiratory system; the high-frequency inspiratory valve generates high-frequency oscillations in the gas of the inspiratory branch; the ventilation control device is connected to the inspiratory branch, the high-frequency inspiratory valve, and the active expiratory device. During the inspiratory phase, the high-frequency inspiratory valve is controlled to generate high-frequency oscillations in the gas of the inspiratory branch according to a preset high-frequency oscillation frequency, and the high-frequency oscillating gas generated by the high-frequency inspiratory valve is output through the inspiratory branch and the patient tubing; during the expiratory phase, the active expiratory device is controlled to actively draw in the gas exhaled by the patient through the patient tubing according to a preset high-frequency oscillation frequency. The respiratory ventilation system provided by this invention utilizes the active expiratory device to draw in the patient's exhaled gas to generate active exhalation, supporting a high-frequency ventilation mode. This not only results in a smaller system size but also reduces gas consumption and noise.

[0102] This invention provides a respiratory ventilation method, implemented using the aforementioned respiratory ventilation system. Figure 6 This is a schematic flowchart of a respiratory ventilation method provided in an embodiment of the present invention. Figure 6 As shown, the main steps include:

[0103] S601. During the inhalation phase, the ventilation control device controls the high-frequency inhalation valve to generate high-frequency oscillation of the gas in the inhalation branch according to the preset high-frequency oscillation frequency, and delivers the generated high-frequency oscillating gas to the patient through the inhalation branch and the patient tubing.

[0104] In an embodiment of the present invention, during the inhalation phase, the respiratory ventilation system can control the high-frequency inhalation valve 3 to generate high-frequency oscillation of the gas in the inhalation branch 2 according to a preset high-frequency oscillation frequency through the ventilation control device 4, and deliver the generated high-frequency oscillating gas to the patient through the inhalation branch 2 and the patient tubing.

[0105] It should be noted that, in the embodiments of the present invention, during the inhalation phase, the ventilation control device 4 can generate corresponding operation commands according to a preset high-frequency oscillation frequency and transmit them to the high-frequency inhalation valve 3. The high-frequency inhalation valve 3 can then execute the received operation commands to achieve high-frequency oscillation of the gas in the inhalation branch 2.

[0106] It should be noted that, in the embodiments of the present invention, the preset high-frequency oscillation frequency can be determined according to the actual needs of the patient, and the embodiments of the present invention do not impose any limitations.

[0107] It should be noted that, in the embodiments of the present invention, the breathing ventilation device can also control the active exhalation device 5 and the high-frequency inhalation valve 3 to work together through the ventilation control device 4, so as to achieve control of the mean airway pressure.

[0108] Specifically, during the inspiratory phase, the ventilation control device 4 can control the active expiratory device 5 to extract a portion of the gas from the inspiratory branch 2, thereby controlling the mean airway pressure to reach a preset state. The proximal pressure sensor 7 on the patient's tubing can monitor the pressure and provide timely feedback to the ventilation control device 4. Based on the feedback pressure, the ventilation control device 4 controls the active expiratory device 5 to extract gas.

[0109] S602. During the exhalation phase, the active exhalation device is controlled by the ventilation control device to actively extract the gas exhaled by the patient through the patient tubing at a preset high-frequency oscillation frequency.

[0110] In an embodiment of the present invention, during the exhalation phase, the respiratory ventilation system can control the active exhalation device 5 to actively extract the gas exhaled by the patient through the patient tubing according to a preset high-frequency oscillation frequency through the ventilation control device 4.

[0111] Specifically, in embodiments of the present invention, the active exhalation device 5 includes: a high-frequency valve 51 and / or an electric gas extraction device 52. During the exhalation phase, the ventilation device controls the active exhalation device 5 to actively extract the gas exhaled by the patient through the patient tubing according to a preset high-frequency oscillation frequency via the ventilation control device 4. This includes: during the exhalation phase, controlling the high-frequency valve 51 to open via the ventilation control device 4, and controlling the opening size of the high-frequency valve 51 and the extraction power of the electric gas extraction device 52 according to the preset high-frequency oscillation frequency to actively extract the gas exhaled by the patient through the patient tubing; or, adjusting the opening size of the high-frequency valve 51 according to the preset high-frequency oscillation frequency via the ventilation control device 4 to actively extract the gas exhaled by the patient through the patient tubing; or, adjusting the extraction power of the electric gas extraction device 52 according to the preset high-frequency oscillation frequency via the ventilation control device 4 to actively extract the gas exhaled by the patient through the patient tubing.

[0112] It should be noted that, in the embodiments of the present invention, during the process of the ventilation control device 4 controlling the corresponding devices to make rapid adjustments according to the preset high-frequency oscillation frequency, the peak pressure, minimum pressure, and oxygen concentration of the inhaled gas at the patient end of each cycle can be controlled to reach the target parameters.

[0113] Figure 7 This is a detailed control diagram of an exemplary ventilation control device provided as an embodiment of the present invention. For example... Figure 7As shown, during high-frequency ventilation, the ventilation control device 4 is mainly responsible for algorithm operation and the control of core components such as the high-frequency inspiratory valve 3, the active exhalation device 5 (including the high-frequency valve 51), and the electric gas extraction device 52. The specific functions of the ventilation control device 4 mainly include high-frequency oxygen mixing control, logic matching of control devices, high-frequency inspiratory valve adjustment, high-frequency valve adjustment, and electric gas extraction device adjustment. The high-frequency oxygen mixing function primarily regulates the flow rate to achieve the desired oxygen concentration target. The logic matching function mainly allocates and coordinates the roles of the high-frequency inspiratory valve 3, high-frequency valve 51, and electric gas extraction device 52 in the pressure control process to achieve optimal control coordination. For example, during the exhalation phase, the ventilation control device 4 prioritizes shutting down the high-frequency inspiratory valve 3 to reduce pressure. If shutting down the high-frequency inspiratory valve 3 cannot achieve the required pressure reduction, then the high-frequency valve 51 and the electric gas extraction device 52 are activated to further reduce pressure. The high-frequency inspiratory valve 3 adjustment function is mainly responsible for the closed-loop feedback control of the flow rate of the high-frequency inspiratory valve 3 during pressure oscillation. The high-frequency valve adjustment function is mainly responsible for controlling the opening size and opening speed of the high-frequency valve 51. When the pressure requirement is to drop rapidly, the high-frequency valve 51 adopts a faster opening control speed; when the pressure requirement is to drop to a larger negative pressure, the high-frequency valve 51 will adjust to a larger opening. The electric gas extraction equipment adjustment function is mainly responsible for the closed-loop control of the speed of the electric gas extraction equipment 52, such as the turbine, to achieve stable output. Finally, the high-frequency intake valve 3, the high-frequency valve 51, and the electric gas extraction equipment 52 execute corresponding operating commands according to the target adjustment value to achieve the desired control effect.

[0114] It should be noted that, in the embodiments of the present invention, as... Figure 7 As shown, during high-frequency oscillatory ventilation, oscillation-related parameters, such as pressure or flow rate, can be obtained by sensors installed at corresponding locations in the respiratory ventilation system and fed back to the ventilation control device 4.

[0115] Figure 8 This is a schematic diagram of the control flow of an exemplary ventilation control device provided in an embodiment of the present invention. Figure 8As shown, the ventilation control device 4 first obtains target parameters, such as the target control pressure, based on the system parameter settings, and performs closed-loop pressure feedback control based on the actual flow rate at the patient end. Then, it performs oxygen concentration feedback control based on the total target flow rate obtained from the parameter feedback and the set target oxygen concentration. Simultaneously, the logic matching function performs control logic matching based on the current control states of the high-frequency inspiratory valve 3, high-frequency valve 51, and electric gas extraction device 52. Next, the high-frequency inspiratory valve 3, high-frequency valve 51, and electric gas extraction device 52 adjust the oscillation pressure and other related parameters according to the control sequence and strength of the logic matching. Throughout the oscillation pressure adjustment process, the ventilation control device 4 monitors the actual pressure at the patient end in real time. If the target control pressure requirement is met, pressure feedback stops, and the current control state is maintained. Otherwise, closed-loop pressure feedback control continues.

[0116] This invention provides a respiratory ventilation method, comprising: during the inspiratory phase, controlling a high-frequency inspiratory valve via a ventilation control device to generate high-frequency oscillation of gas in the inspiratory branch according to a preset high-frequency oscillation frequency, and delivering the generated high-frequency oscillating gas to the patient through the inspiratory branch and the patient tubing; during the expiratory phase, controlling an active expiratory device via the ventilation control device to actively extract gas exhaled by the patient through the patient tubing according to a preset high-frequency oscillation frequency. The respiratory ventilation method provided by this invention utilizes an active expiratory device to extract exhaled gas from the patient to generate active exhalation, supporting a high-frequency ventilation mode. This not only results in a smaller system size but also reduces gas consumption and noise.

[0117] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

[0118] Industrial Applicability

[0119] In the technical solution of this invention embodiment, during the inhalation phase, the ventilation control device controls a high-frequency inhalation valve to generate high-frequency oscillations in the inhalation branch according to a preset high-frequency oscillation frequency, and the generated high-frequency oscillating gas is delivered to the patient through the inhalation branch and the patient tubing; during the exhalation phase, the ventilation control device controls an active exhalation device to actively extract the gas exhaled by the patient through the patient tubing according to a preset high-frequency oscillation frequency. The technical solution provided by this invention embodiment utilizes an active exhalation device to extract the patient's exhaled gas to generate active exhalation, thereby supporting a high-frequency ventilation mode. This not only results in a smaller system size but also reduces gas consumption and noise.

Claims

1. A respiratory ventilation system, characterized in that, The system includes: a gas source interface, an inhalation branch, a high-frequency inhalation valve, a ventilation control device, and an active exhalation device; The inspiratory branch is connected to the air source interface and the patient tubing connected to the patient's respiratory system, respectively. The high-frequency intake valve generates high-frequency oscillations in the gas of the intake branch. The ventilation control device is connected to the inspiratory branch, the high-frequency inspiratory valve, and the active exhalation device. The active exhalation device includes a high-frequency valve and an electric gas extraction device. During the inhalation phase, the high-frequency inspiratory valve is controlled to generate high-frequency oscillations in the gas of the inspiratory branch according to a preset high-frequency oscillation frequency, and the high-frequency oscillating gas generated by the high-frequency inspiratory valve is output through the inspiratory branch and the patient tubing. During the exhalation phase, the high-frequency valve is controlled to open, and the opening size of the high-frequency valve and the extraction power of the electric gas extraction device are controlled according to the preset high-frequency oscillation frequency to actively extract the gas exhaled by the patient through the patient tubing.

2. The respiratory ventilation system according to claim 1, characterized in that, The respiratory ventilation system also includes an expiratory branch, which is connected to the patient tubing to expel the patient's exhaled air. The active exhalation device is installed in the inhalation branch or the exhalation branch.

3. The respiratory ventilation system according to claim 2, characterized in that, The high-frequency valve is either a switching valve or a proportional valve.

4. The respiratory ventilation system according to claim 2, characterized in that, The ventilation control device is also used to control the active exhalation device to shut down, so as to expel the gas exhaled by the patient through the patient tubing via the expiratory branch.

5. The respiratory ventilation system according to claim 2, characterized in that, During the exhalation phase, the ventilation control device can shut off the high-frequency inhalation valve to reduce pressure. If shutting off the high-frequency inhalation valve cannot achieve the required pressure reduction, the high-frequency valve and the electric gas extraction device can be restarted to reduce pressure.

6. The respiratory ventilation system according to claim 2, characterized in that, The air source interface includes a first air source interface and a second air source interface, and the intake branch includes a first air supply branch, a second air supply branch, and a third air supply branch. The outlet of the first air supply branch and the outlet of the second air supply branch are respectively connected to the inlet of the third air supply branch. The outlet of the third gas supply branch is connected to the patient's tubing; The air inlet of the first air supply branch is connected to the first air source interface; The air inlet of the second air supply branch is connected to the second air source interface.

7. The respiratory ventilation system according to claim 6, characterized in that, The first air supply branch includes a first intake check valve and a first flow regulating valve connected in sequence; the second air supply branch includes a second intake check valve and a second flow regulating valve connected in sequence; and the third air supply branch includes a third intake check valve. The first intake check valve is connected to the first air source interface, and the second intake check valve is connected to the second air source interface.

8. The respiratory ventilation system according to claim 7, characterized in that, The first gas supply branch and the second gas supply branch respectively deliver oxygen and different gases in the air to the third gas supply branch for mixing; The high-frequency intake valve is installed on the third air supply branch and is sequentially connected to the third intake check valve to oscillate the mixture of oxygen and air at high frequency. The first flow regulating valve and the second flow regulating valve are respectively connected to the high-frequency intake valve.

9. The respiratory ventilation system according to claim 7, characterized in that, The first gas supply branch and the second gas supply branch respectively deliver oxygen and different gases in the air to the third gas supply branch for mixing; The high-frequency intake valve includes a first flow regulating valve on the first air supply branch and a second flow regulating valve on the second air supply branch. The first flow regulating valve and the second flow regulating valve respectively oscillate the gas delivered in their respective gas delivery branches at high frequency.

10. The respiratory ventilation system according to claim 1, characterized in that, The ventilation control device extracts a portion of the gas from the inspiratory branch by controlling the operation of the active exhalation device during the inhalation phase, so that the active exhalation device and the high-frequency inhalation valve work together to control the mean airway pressure.

11. The respiratory ventilation system according to claim 1, characterized in that, The high-frequency intake valve is any one of a proportional solenoid valve, a shut-off valve, a servo valve, and a turbine.

12. The respiratory ventilation system according to claim 7, characterized in that, The active exhalation device is connected to the outlet of the third inhalation one-way valve, or to the exhalation branch.

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