Spraying ventilation effect measurement experiment device

Abstract

The utility model discloses an injection ventilation effect measurement experiment device, which comprises an injection needle, a simulation lung, a gas collection bottle, a simulation gas channel, a PLC (Programmable Logic Controller) and an electromagnetic valve group, and the electromagnetic valve group comprises an electromagnetic valve S1 and an electromagnetic valve S2; one end of the simulation air passage is connected with the injection needle, the other end of the simulation air passage is connected with a port P of the electromagnetic valve S1, a port A of the electromagnetic valve S1 is connected with a port R of the electromagnetic valve S2, a port A of the electromagnetic valve S2 is connected with the simulation lung, and a port R of the electromagnetic valve S1 is connected with a first air inlet of the air collection bottle; the PLC is connected with the electromagnetic valve group so as to control the electromagnetic valve group to be powered on or powered off; when a ventilation inspiration phase is jetted, the PLC controls the electromagnetic valve S1 to be electrified so as to enable the jet ventilation needle to be communicated with the simulated lung; when a ventilation expiration phase is jetted, the PLC controls the electromagnetic valve S1 to be powered off, so that the gas collection bottle is communicated with the simulated lung; collection of expiratory phase airflow in jet ventilation is achieved, and variable data influencing jet ventilation can be quantitatively obtained.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a jet ventilation effect measurement experimental device. Background Art

[0002] Jet ventilation is widely used in the diagnosis and treatment of rigid bronchoscopy in the respiratory department. However, due to the open airway, the expiratory phase gas is directly discharged and difficult to obtain. This makes it impossible to accurately monitor or predict the actual jet ventilation effect indicators such as tidal volume, minute ventilation, peak airway pressure, oxygen concentration, etc. There are many variables that affect the effect of jet ventilation. The driving pressure, inspiration-expiration ratio, jet needle inner diameter, degree of airway stenosis, lung compliance, lung capacity, jet needle placement, the angle between the jet needle and the airway, and other multivariate combinations affect the ventilation effect. Over the years, only a small amount of medical literature has explored some variables, and there is no authoritative expert consensus or literature to guide actual specific applications. Utility Model Content

[0003] In view of the defects in the prior art, the purpose of the utility model is to provide a jet ventilation effect measurement experimental device.

[0004] The technical solution adopted by the utility model is:

[0005] The jet ventilation effect measurement experimental device comprises a jet needle, a simulated lung, a gas collecting bottle, a simulated airway, a PLC controller and a solenoid valve group, wherein the solenoid valve group comprises a solenoid valve S1 and a solenoid valve S2; one end of the simulated airway is connected to the jet needle, and the other end is connected to the P port of the solenoid valve S1, the A port of the solenoid valve S1 is connected to the R port of the solenoid valve S2, the A port of the solenoid valve S2 is connected to the simulated lung, and the R port of the solenoid valve S1 is connected to the first air inlet of the gas collecting bottle; the PLC controller is connected to the solenoid valve group to control the power on or off of the solenoid valve group, when the solenoid valve group is powered on, its P port is connected to the A port, and when the solenoid valve group is powered off, its R port is connected to the A port;

[0006] When the jet ventilation is in the inspiratory phase, the PLC controller controls the solenoid valve S1 to be energized so that the jet ventilation needle is connected to the simulated lung;

[0007] During the jet ventilation expiratory phase, the PLC controller controls the solenoid valve S1 to be de-energized to connect the gas collection bottle with the simulated lung.

[0008] Furthermore, the solenoid valve group further comprises a solenoid valve B, a P port of the solenoid valve B is connected to the first gas source, and an A port of the solenoid valve B is connected to the injection needle.

[0009] Furthermore, a first oxygen analyzer is installed between the solenoid valve B and the injection needle.

[0010] Furthermore, it also includes an air-oxygen mixer and a first pressure regulating valve, the first gas source includes an air source and an oxygen source, the air source and the oxygen source are respectively connected to the air inlet of the air-oxygen mixer, the air outlet of the air-oxygen mixer is connected to the air inlet of the first pressure regulating valve, and the air outlet of the first pressure regulating valve is connected to the P port of the solenoid valve B.

[0011] Furthermore, a pressure gauge is connected between the first oxygen analyzer and the injection needle.

[0012] Furthermore, a PE gas collecting plastic bag is provided in the gas collecting bottle, and the first gas inlet of the gas collecting bottle is connected to the PE gas collecting plastic bag.

[0013] Furthermore, it also includes a second gas source, a main engine and a gas flow meter, and the solenoid valve group also includes a solenoid valve C and a solenoid valve D. The P port of the solenoid valve C is connected to the second gas source, and the A port of the solenoid valve C is connected to the second gas inlet of the gas collecting bottle. The gas collecting bottle is provided with a first gas outlet connected to the PE gas collecting plastic bag, and the first gas outlet is connected to the P port of the solenoid valve D, and the A port of the solenoid valve D is connected to the inlet of the gas flow meter, and the signal output end of the gas flow meter is connected to the main engine.

[0014] Furthermore, it also includes a second oxygen analyzer, the inlet of which is connected to the outlet of the gas flow meter, and the signal output end of which is connected to the host.

[0015] Furthermore, the solenoid valve group further includes a solenoid valve S3, and the gas collecting bottle is provided with a second gas outlet, which is connected to the A port of the solenoid valve S3, and the R port of the solenoid valve S3 is connected to the atmosphere.

[0016] Furthermore, the simulated airway includes a first airway segment, a second airway segment, a third airway segment and a narrow segment, and the first airway segment, the second airway segment and the third airway segment are detachably connected in sequence, and the narrow segment is detachably connected between the first airway segment and the second airway segment, or between the second airway segment and the third airway segment, or between the third airway segment and the solenoid valve S1.

[0017] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0019] Figure 1 A schematic diagram of the structure of the jet ventilation effect measurement experimental device provided in the embodiment of the present application;

[0020] Figure 2 A schematic diagram of the simulated lung structure provided in an embodiment of the present application;

[0021] Figure 3 A schematic diagram of the simulated airway structure provided in an embodiment of the present application;

[0022] Figure 4 An exploded view of a simulated airway provided in an embodiment of the present application;

[0023] Figure 5 A schematic diagram of the structure of a narrow section provided in an embodiment of the present application;

[0024] Figure 6 A schematic diagram of the structure of the gas collecting bottle provided in the embodiment of the present application;

[0025] Figure 7 This is a schematic diagram of the structure of a PE gas collecting plastic bag provided in an embodiment of the present application;

[0026] Figure 8 This is an exploded view of the gas collecting bottle provided in an embodiment of the present application.

[0027] Among them, there are a jet needle 1, a simulated airway 2, a first airway segment 21, a second airway segment 22, a third airway segment 23, a stenosis segment 24, a simulated lung 3, an airway pressure detection port 31, a gas collecting bottle 4, a first air inlet 41, a first air outlet 42, a second air inlet 43, a second air outlet 44, a pressure relief safety valve 45, a tempered glass perspective window 46, and a gas collecting plastic bag 5. DETAILED DESCRIPTION

[0028] Here, it should be noted that the functions and methods involved in the present invention are merely conventional adaptive applications of the prior art. Therefore, the improvement of the present invention on the prior art is essentially the connection relationship between the hardware, rather than the functions and methods themselves. That is, although the present invention involves some functions and methods, it does not include improvements to the functions and methods themselves. The description of the functions and methods in the present invention is to better illustrate the present invention so as to better understand the present invention.

[0029] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0030] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.

[0031] See also Figures 1 to 8 The present application discloses an experimental device for measuring the effect of jet ventilation, comprising a jet needle 1, a simulated lung 3, a gas collecting bottle 4, a simulated airway 2, a PLC controller and a solenoid valve group, wherein the solenoid valve group comprises a solenoid valve S1 and a solenoid valve S2; one end of the simulated airway 2 is connected to the jet needle 1, and the other end is connected to the P port of the solenoid valve S1, the A port of the solenoid valve S1 is connected to the R port of the solenoid valve S2, the A port of the solenoid valve S2 is connected to the simulated lung 3, and the R port of the solenoid valve S1 is connected to the first air inlet 41 of the gas collecting bottle 4; the PLC controller is connected to the solenoid valve group to control its power on or off, when the solenoid valve group is powered on, its P port is connected to the A port, when the solenoid valve group is powered off, its R port is connected to the A port; when the jet ventilation is in the inspiratory phase, the PLC controller controls the solenoid valve S1 to be powered on so that the jet ventilation needle is connected to the simulated lung 3; when the jet ventilation is in the expiratory phase, the PLC controller controls the solenoid valve S1 to be powered off so that the gas collecting bottle 4 is connected to the simulated lung 3.

[0032] The present application sets a jet needle 1, a simulated lung 3, a gas collecting bottle 4, a simulated airway 2, a PLC controller and a solenoid valve group, and can control the power on or off of each solenoid valve in the solenoid valve group through the PLC controller, thereby controlling the direction of the airflow; when the jet ventilation is in the inspiratory phase, the solenoid valve S1 is energized through the PLC controller. At this time, the P port of the solenoid valve S1 is connected to the A port, the solenoid valve S2 remains de-energized, and its R port is connected to the A port, and the jet airflow enters the simulated lung 3 through the simulated airway 2, the P port and the A port of the solenoid valve S1, and the R port and the A port of the solenoid valve S2; when the jet ventilation is in the expiratory phase, the solenoid valve S1 is energized. During the gas phase, the solenoid valve S1 is de-energized through the PLC controller, and the solenoid valve S2 remains de-energized. At this time, the R port of the solenoid valve S1 is connected to the A port, and the R port of the solenoid valve S2 is connected to the A port. The airflow enters the gas collecting bottle 4 from the simulated lung 3 through the A port and R port of the solenoid valve S2 and the A port and R port of the solenoid valve S1, thereby realizing the collection of the expiratory phase airflow in jet ventilation. By setting up appropriate detection instruments and detecting the airflow in the inspiratory and expiratory phases of jet ventilation, the variable data affecting jet ventilation can be quantitatively obtained, providing experimental data for the subsequent evaluation and prediction of the jet ventilation effect.

[0033] The simulated airway 2 is a combined simulated airway, which includes a first airway segment 21, a second airway segment 22, a third airway segment 23 and a narrow segment 24. The first airway segment 21, the second airway segment 22 and the third airway segment 23 are prefabricated with internal and external threads at both ends, and the three segments are detachably connected through the internal and external threads of male and female heads in sequence. The end of the first airway segment 21 is an air inlet, and the end of the third airway segment 23 is an air outlet; the internal and external threads are respectively arranged at both ends of the narrow segment 24, which can be detachably connected between the first airway segment 21 and the second airway segment 22, or between the second airway segment 22 and the third airway segment 23, or between the third airway segment 23 and the solenoid valve S1 through the internal and external threads.

[0034] The long axis of the first airway segment 21 is 100 mm, and the second airway segment 22 is the same as the third airway segment 23, with a long axis of 50 mm. The first airway segment 21, the second airway segment 22 and the third airway segment 23 are all made of plastic or steel, with a uniform inner diameter of 8 to 16 mm, and a smooth inner wall to simulate the human airway; the stenosis segment 24 is 10 to 20 mm in length and 3 to 6 mm in inner diameter. It can be connected between the first airway segment 21 and the second airway segment 22 to simulate the stenosis of the upper trachea, or connected between the second airway segment 22 and the third airway segment 23 to simulate the stenosis of the middle trachea, or connected between the third airway segment 23 and the P port of the solenoid valve S1 to simulate the stenosis of the lower trachea; the smaller the inner diameter of the stenosis segment 24, the more severe the simulated tracheal stenosis.

[0035] The simulated lung 3 includes a Y-type connector and two Dräger ventilator test splint lungs. One end of the Y-type connector is connected to the A port of the solenoid valve S2, and the other two ports are connected to the two splint lungs respectively; the maximum capacity of a single splint lung is 1000ml, and the two splint lungs are used in parallel to simulate the physiological state of the two lungs of a normal adult; only one splint lung is used to simulate the pathological and physiological state of a single lung. If other types of simulated lungs 3 are used, different lung compliances and airway resistances can be simulated, and they can be used compatible with this experimental device; an airway pressure detection port 31 can be set between the A port of the solenoid valve S2 and the Y-type connector, and a high-precision digital pressure gauge M2 can be connected. The pressure gauge M2 is connected to the host to collect the airway pressure change value and send it to the host.

[0036] The gas collecting bottle 4 is made of stainless steel or other metals, with a thickness of 2-5 mm and a capacity of 100 L. A PE gas collecting plastic bag 5 is arranged in the gas collecting bottle 4, and the PE plastic bag has a thickness of 0.05-0.07 mm, strong flexibility, high pressure resistance, and a capacity of 20-80 L.

[0037] The gas collecting bottle 4 includes a bottle body and a bottle cap, and the bottle cap is fastened to the top of the bottle body by rotating with a thread, which is convenient for disassembly and replacement of the accessories of the PE gas collecting plastic bag 5 in the cylinder. An air guide tube is arranged in the middle of the bottle cap, and its inner diameter is 15 to 20 mm. A Y-shaped interface is arranged on the exposed section of the air guide tube, which are the first air inlet 41 and the first air outlet 42, respectively, for the air inlet and outlet of the PE gas collecting plastic bag 5; the first air inlet 41 is connected to the R port of the large-diameter solenoid valve S1, and the first air outlet 42 is connected to the P port of the high-frequency solenoid valve D. A plurality of air guide holes are evenly arranged on the lower section of the air guide tube, and the inner diameter of the air guide holes is 2 to 3 mm, which is conducive to improving the discharge efficiency of the gas in the PE gas collecting plastic bag 5 when it is squeezed. The bag mouth of the gas collecting plastic bag 5 is placed above the air guide hole, and the air guide tube is tightly wrapped and wound.

[0038] A second air inlet 43, a second air outlet 44 and a pressure relief safety valve 45 are provided on the bottle body. The second air inlet 43 is an air injection connection port with an inner diameter of 5 to 6 mm, which is connected to the A port of the high-frequency solenoid valve C; the second air outlet 44 is an atmosphere connection port with an inner diameter of 20 mm, which is connected to the A port of the large-diameter pneumatic solenoid valve S3; the pressure relief safety valve 45 prevents the gas collecting plastic bag 5 from rupturing due to excessive air pressure in the bottle, and the upper limit of the air pressure is 0.2 to 0.25 MPa; a tempered glass perspective window 46 is also provided on the bottle body to observe the expansion and contraction state of the PE gas collecting plastic bag 5 in the cylinder.

[0039] The inlet end of the injection needle 1 is connected to a first gas source, which is a central oxygen supply.

[0040] Specifically, the first gas source includes an air source and an oxygen source. An air-oxygen mixer G, a first pressure regulating valve A1, a solenoid valve B, a first oxygen analyzer and a first pressure gauge M1 are installed in sequence between the first gas source and the injection needle 1. The first oxygen analyzer is an ion flow oxygen analyzer, and the first pressure gauge M1 is a high-precision digital pressure gauge; the P port of the solenoid valve B is connected to the first pressure regulating valve A1, and its A port is connected to the first oxygen analyzer.

[0041] The air and oxygen from the first gas source are mixed in a certain proportion by the air-oxygen mixer, and after the injection pressure is adjusted by the first pressure regulating valve A1, injection ventilation is performed by the injection needle 1. The oxygen concentration adjusted by the air-oxygen mixer ranges from 21% to 100%; the first oxygen analyzer and the first pressure gauge are used to measure the oxygen concentration and pressure of the injection gas flow respectively; when the PLC controller controls the solenoid valve B and the solenoid valve S1 to be energized, the P port of the solenoid valve B is connected to the A port, and the P port of the solenoid valve S1 is connected to the A port, and the injection ventilation is performed.

[0042] In order to inject air into the gas collecting bottle 4, a second gas source is also included. The second gas source is an air source, and the solenoid valve group also includes a solenoid valve C and a solenoid valve D. The P port of the solenoid valve C is connected to the second gas source, and the A port of the solenoid valve C is connected to the second air inlet 43 of the gas collecting bottle 4. A second pressure regulating valve A2 is installed between the second gas source and the P port of the solenoid valve C to adjust the air pressure entering the gas collecting bottle 4; when the PLC controller controls the solenoid valve C to be energized, the P port of the solenoid valve C is connected to the A port, and air is injected into the gas collecting bottle 4, and the PE gas collecting plastic bag 5 in the gas collecting bottle 4 is squeezed by the air to discharge the air in the gas collecting plastic bag 5.

[0043] In order to detect the airflow discharged from the PE gas collecting plastic bag 5, a gas flow meter and a second oxygen analyzer are also included; the solenoid valve group also includes a solenoid valve D, the P port of the solenoid valve D is connected to the first air outlet 42, the A port of the solenoid valve D is connected to the inlet of the gas flow meter, and the signal output end of the gas flow meter is connected to the host; the gas flow discharged from the PE gas collecting plastic bag 5 is detected by the gas flow meter, and the detection data is sent to the host; the second oxygen analyzer is an ion flow oxygen analyzer, whose inlet is connected to the outlet of the gas flow meter, and its signal output end is connected to the host, and the oxygen of the discharged gas is detected by the second oxygen analyzer, and the detection data is sent to the host.

[0044] In order to facilitate the discharge of the air in the gas collecting bottle 4, the solenoid valve group further includes a solenoid valve S3, the A port of the solenoid valve S3 is connected to the second gas outlet 44, and the R port of the solenoid valve S3 is connected to the atmosphere.

[0045] The PLC controller is a programmable logic control relay, which is used to control the channel or power off of each solenoid valve in the solenoid valve group respectively, to achieve the setting of injection parameters and control the guidance of multiple air flow paths.

[0046] The host is a computer, which is used to receive the detection data of each detection instrument.

[0047] Solenoid valves S1, S2 and S3 are all large-diameter solenoid valves, with internal cross-sectional area: P→A, 210mm 2 ; A→R, 235mm 2 The P ports of S2 and S3 are blocked with threaded plugs. Solenoid valves B, C and D are all high-frequency solenoid valves VT317-6G-02, with internal cross-sectional area: A→R, 12.6mm 2 , R port is blocked with a threaded plug. When all solenoid valves are powered on, P port is connected to A port, and R port is closed; when powered off, A port is connected to R port, and P port is closed.

[0048] The first pressure gauge M1 and the second pressure gauge M2: high-precision 0.1% digital pressure gauge, pressure measuring range 0 ~ 0.25Mpa, can collect up to 10 data per second, with RS485 communication, supporting software to collect data and generate excel documents.

[0049] The first oxygen analyzer and the second oxygen analyzer are ion flow oxygen sensors with a measuring range of 21% to 99.99%, with RS485 communication. The analyzers are connected to a data recorder to form data files, which are copied to a computer for archiving.

[0050] High-precision gas flow meter: MEMS mass flow meter, range 0-50L, with RS485 communication, computer running supporting acquisition software Siargo User Application Software, Siargo Ltd. to generate notepad documents.

[0051] Before starting the experiment, the PLC control instructions are set, including control instruction X, control instruction 1, and control instruction 2.

[0052] Control instruction X: PLC controller energizes and de-energizes high-frequency solenoid valve B and large-diameter solenoid valve S1, with the energizing time T1 (unit: s) and de-energizing time T2 (unit: s), such as: energizing for 3.000s, de-energizing for 3.000s, with T1 and T2 accurate to 0.001s. Frequency (F) = 60 / (T1+T2), I:E = T1:T2. In this way, the parameter settings of inhalation time (IT), exhalation time (ET), and inhalation-exhalation ratio (I / E) can be realized.

[0053] Control instruction 1: The PLC controller continuously energizes the solenoid valve B for 30 seconds; high-pressure gas can be introduced before the experiment begins, and the oxygen concentration and driving pressure during the experiment can be determined through the first oxygen analyzer and the first pressure gauge.

[0054] Control instruction 2: The PLC controller continuously energizes the solenoid valves C, D, S2, and S3; the second gas source introduces high-pressure air into the gas collecting bottle 4, and the second gas outlet 44 of the gas collecting bottle 4 is closed. The high-pressure air squeezes the gas collecting plastic bag 5, and the gas flow in the gas collecting plastic bag 5 flows out through the high-frequency solenoid valve D and is detected by the subsequent gas flow meter and the second oxygen analyzer.

[0055] The experimental method of this application is as follows:

[0056] 1. The host runs the pneumatic digital pressure gauge measurement software, and the PLC controller executes the control instruction X, which lasts for 60 seconds (1 minute ventilation test period) and is powered off for 10 seconds (power off pause period).

[0057] a: 1 minute ventilation test period, specifically divided into inspiration phase and expiration phase.

[0058] Inspiratory phase: high-frequency solenoid valve B and solenoid valve S1 are energized, and the jet air flows through the jet needle 1 into the simulated airway 2, causing the simulated lung 3 to expand;

[0059] Exhalation phase: High-frequency solenoid valve B and solenoid valve S1 are powered off, and the airflow in the simulated lung 3 enters the gas collecting cylinder through the R ports of the solenoid valves S2 and S1.

[0060] b. During the power-off pause period (10 seconds), close the pressure measurement software, start the gas flow meter measurement software, start the oxygen analyzer software, and wait for the execution of control instruction 2.

[0061] 2. Execute control instruction 2: Keep energized to solenoid valves C, D, S2, and S3. High-pressure air enters the gas collection cylinder to squeeze the low-tension PE gas collection plastic bag 5K. The gas in K is measured by a high-precision gas flow meter and the flow rate and cumulative flow rate. The ion flow oxygen analyzer measures the oxygen concentration and collects data to form raw data. When the computer software shows that the instantaneous flow rate is 0, release control instruction 2 and close the flow measurement software. Turn off the ion flow oxygen analyzer.

[0062] 3. Repeat steps 1 and 2 to repeatedly measure the jet ventilation effect data under the same combination of parameters.

[0063] Using this experimental setup, the variables that can be changed individually or in combination are:

[0064] 1. Driving gas oxygen concentration: The oxygen concentration of the driving gas flow ejected by the high-frequency solenoid valve B is measured by the ion flow oxygen analyzer. By adjusting the air-oxygen mixer G, the driving gas oxygen concentration that meets the experimental conditions can be obtained. The oxygen concentration range is 21% to 100%.

[0065] 2. Inner diameter of injection needle 1: Select injection needle 1 with different inner diameters according to experimental needs.

[0066] 3. The depth of the injection needle 1 entering the simulated airway 2.

[0067] 4. The angle between the jet needle 1 and the long axis of the simulated airway 2.

[0068] 5. Simulate the degree and location of the stenosis of the stenosis segment of airway 2.

[0069] 6. Simulate the number, capacity and airway resistance of lung 3.

[0070] One or more of the above-mentioned independent variables can be selected according to the experimental design to measure and compare the effects on dependent variables such as minute ventilation, airway pressure, and oxygen concentration.

[0071] By adopting the technical solution of this application, a variety of experimental schemes can be designed to explore the impact of various combined variables on the actual ventilation effect in all directions and dimensions. The experimental device uses common instruments and equipment in the medical industry and industry. The unstable experimental airflow is collected in a plastic bag and then squeezed with high-pressure air to discharge it at a stable flow rate. The minute flow rate, oxygen concentration and other ventilation effect evaluation data are measured, which are more stable and accurate than the direct measurement method. The experimental data has directional value, providing directional guidance for further animal experiments and clinical practical applications, creating good economic value and social benefits.

[0072] In this application, unless otherwise clearly specified and limited, the terms "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0073] In the specification of the present utility model, a lot of specific details are described. However, it is understood that the embodiments of the present utility model can be practiced without these specific details. In some examples, well-known methods, systems and techniques are not shown in detail so as not to obscure the understanding of this specification.

[0074] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, systems, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, systems, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. The jet ventilation effect measurement experimental device is characterized by: It includes an injection needle, a simulated lung, a gas collecting bottle, a simulated airway, a PLC controller and a solenoid valve group, wherein the solenoid valve group includes a solenoid valve S1 and a solenoid valve S2; one end of the simulated airway is connected to the injection needle, and the other end is connected to the P port of the solenoid valve S1, the A port of the solenoid valve S1 is connected to the R port of the solenoid valve S2, the A port of the solenoid valve S2 is connected to the simulated lung, and the R port of the solenoid valve S1 is connected to the first air inlet of the gas collecting bottle; the PLC controller is connected to the solenoid valve group to control the power on or off of the solenoid valve group, when the solenoid valve group is powered on, its P port is connected to the A port, and when the solenoid valve group is powered off, its R port is connected to the A port; When the jet ventilation is in the inspiratory phase, the PLC controller controls the solenoid valve S1 to be energized so that the jet ventilation needle is connected to the simulated lung; During the jet ventilation expiratory phase, the PLC controller controls the solenoid valve S1 to be de-energized to connect the gas collection bottle with the simulated lung.

2. The jet ventilation effect measurement experimental device according to claim 1, characterized in that: The solenoid valve group further includes a solenoid valve B, a P port of the solenoid valve B is connected to the first gas source, and an A port of the solenoid valve B is connected to the injection needle.

3. The jet ventilation effect measurement experimental device according to claim 2, characterized in that: A first oxygen analyzer is also installed between the solenoid valve B and the injection needle.

4. The jet ventilation effect measurement experimental device according to claim 2, characterized in that: It also includes an air-oxygen mixer and a first pressure regulating valve, the first gas source includes an air source and an oxygen source, the air source and the oxygen source are respectively connected to the air inlet of the air-oxygen mixer, the air outlet of the air-oxygen mixer is connected to the air inlet of the first pressure regulating valve, and the air outlet of the first pressure regulating valve is connected to the P port of the solenoid valve B.

5. The jet ventilation effect measurement experimental device according to claim 3, characterized in that: A pressure gauge is connected between the first oxygen analyzer and the injection needle.

6. The jet ventilation effect measurement experimental device according to claim 1, characterized in that: A PE gas collecting plastic bag is arranged in the gas collecting bottle, and the first gas inlet of the gas collecting bottle is connected to the PE gas collecting plastic bag.

7. The jet ventilation effect measurement experimental device according to claim 6, characterized in that: It also includes a second gas source, a main engine and a gas flow meter. The solenoid valve group also includes a solenoid valve C and a solenoid valve D. The P port of the solenoid valve C is connected to the second gas source, and the A port of the solenoid valve C is connected to the second gas inlet of the gas collecting bottle. The gas collecting bottle is provided with a first gas outlet connected to the PE gas collecting plastic bag, and the first gas outlet is connected to the P port of the solenoid valve D. The A port of the solenoid valve D is connected to the inlet of the gas flow meter, and the signal output end of the gas flow meter is connected to the main engine.

8. The jet ventilation effect measurement experimental device according to claim 7, characterized in that: It also includes a second oxygen analyzer, the inlet of which is connected to the outlet of the gas flow meter, and the signal output end of which is connected to the host.

9. The jet ventilation effect measurement experimental device according to claim 6, characterized in that: The solenoid valve group further includes a solenoid valve S3. The gas collecting bottle is provided with a second gas outlet, which is connected to the A port of the solenoid valve S3. The R port of the solenoid valve S3 is connected to the atmosphere.

10. The jet ventilation effect measurement experimental device according to claim 1, characterized in that: The simulated airway includes a first airway segment, a second airway segment, a third airway segment and a narrow segment. The first airway segment, the second airway segment and the third airway segment are detachably connected in sequence. The narrow segment is detachably connected between the first airway segment and the second airway segment, or between the second airway segment and the third airway segment, or between the third airway segment and the solenoid valve S1.

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