A breathing machine and its dedicated ventilation circuit connection device and assembly method

Abstract

The present application relates to a kind of breathing machine and its dedicated ventilation loop connecting device and assembly method, the ventilation loop connecting device includes: inspiratory end shunt connector, the shunt chamber is formed in the inside of the inspiratory end shunt connector with three open ends all being communicated with it, the open end of the inspiratory end shunt connector is formed inspiratory end shunt connector air inlet with its closed end opposite, the other two open ends of the inspiratory end shunt connector are formed two inspiratory end shunt connector air outlet respectively;Expiratory end pressure measuring connector, the pressure measuring chamber is formed in the inside of the expiratory end pressure measuring connector with three open ends all being communicated with it, the open end of the expiratory end pressure measuring connector is formed expiratory end pressure measuring connector air outlet with its closed end opposite, the other two open ends of the expiratory end pressure measuring connector are formed two expiratory end pressure measuring connector air inlet respectively;The device of the application can simultaneously give the airflow of breathing machine to multiple patients simultaneously breathing, greatly relieve the problem of breathing machine serious shortage in emergency public health event.

Description

TECHNICAL FIELD

[0001] The present application relates to a breathing machine and its dedicated ventilation loop connection device and assembly method, belonging to the technical field of medical instruments. BACKGROUND

[0002] In the sudden public health event, the shortage of critical medical resources is often a prominent problem that restricts and limits patient treatment. The breathing machine is an indispensable key medical equipment for treating respiratory failure in severe patients, but because of its complex structure and high cost, there is usually not enough resource reserve and timely production capacity to cope with the sudden public health event.

[0003] If a breathing machine can simultaneously support the breathing of two patients, or even multiple patients, it will greatly alleviate this urgent medical problem and effectively save more lives. However, the existing breathing machines almost all adopt the ventilation loop mode of the circulation loop, and such connection mode is designed for single use only, making it impossible to realize the simultaneous ventilation support of multiple people. Simply splitting the ventilation of the breathing machine to different patients through a Y-shaped joint will cause over-ventilation or under-ventilation due to the different lung compliance of the patients, which not only cannot achieve treatment, but even poses a danger. Similarly, simply collecting the exhalation of different patients back to the breathing machine through a Y-shaped joint will cause the actual tidal volume of different patients to be indistinguishable, making it difficult to determine whether sufficient ventilation has been achieved. SUMMARY

[0004] In view of the above problems, the purpose of the present application is to provide a breathing machine and its dedicated ventilation loop connection device and assembly method to solve the above technical problems.

[0005] To achieve the above purpose, the present application adopts the following technical scheme:

[0006] The present application provides a breathing machine dedicated ventilation loop connection device, comprising:

[0007] The inspiratory end shunt joint 1 is a cross-shaped structure with one end closed and three open ends, and a shunt chamber 103 is formed inside the inspiratory end shunt joint 1 which is in communication with the three open ends. The open end of the inspiratory end shunt joint 1 opposite to the closed end forms an inspiratory end shunt joint air inlet 101, and the other two open ends of the inspiratory end shunt joint 1 form two inspiratory end shunt joint air outlets 102 respectively;

[0008] A sliding shunt piece 104 is arranged in the shunt chamber 103, and the sliding shunt piece 104 can freely slide in the shunt chamber 103 to shunt the gas entering the inspiratory end shunt joint air inlet 101 to the two inspiratory end shunt joint air outlets 102 in different proportions;

[0009] The expiratory end pressure measuring connector 2 is in the shape of a cross with one closed end and three open ends. A pressure measuring chamber 203 is formed inside the expiratory end pressure measuring connector 2 and communicates with the three open ends. The open end opposite to the closed end of the expiratory end pressure measuring connector 2 forms an expiratory end pressure measuring connector gas outlet 201. The other two open ends of the expiratory end pressure measuring connector 2 form two expiratory end pressure measuring connector gas inlets 202.

[0010] A sliding pressure measuring sheet 204 is arranged in the pressure measuring chamber 203. The sliding pressure measuring sheet 204 can freely slide in the pressure measuring chamber 203 to divide the gas entering the expiratory end pressure measuring connector gas inlets 202 into two different proportions and flow into the expiratory end pressure measuring connector gas outlets 201.

[0011] The ventilation loop connecting device. Preferably, the first end of the sliding dividing sheet 104 is located in the closed end of the inspiratory end dividing connector 1 and the second end is located in the inspiratory end dividing connector gas inlet 101 to divide the dividing chamber 103 into two chambers. A dividing sheet sliding rod 107 is arranged in the closed end of the inspiratory end dividing connector 1. The first end of the sliding dividing sheet 104 is slidingly connected to the dividing sheet sliding rod 107. The sliding dividing sheet 104 can freely slide on the dividing sheet sliding rod 107.

[0012] The ventilation loop connecting device. Preferably, an inspiratory end filter 105 is arranged in the inspiratory end dividing connector gas inlet 101 above the sliding dividing sheet 104. A gap is left between the inspiratory end filter 105 and the sliding dividing sheet 104.

[0013] The ventilation loop connecting device. Preferably, an inspiratory end flow control plug 106 is fixed to the closed end side wall of the inspiratory end dividing connector 1 near the two inspiratory end dividing connector gas outlets 102 to prevent the sliding dividing sheet 104 from contacting the two chamber side walls of the dividing chamber 103.

[0014] The ventilation loop connecting device. Preferably, the number of inspiratory end dividing connectors 1 and expiratory end pressure measuring connectors 2 is 2 respectively. N N is a positive integer, 2 N The connection mode of the two inspiratory end dividing connectors 1 is that the inspiratory end dividing connector gas inlet 101 of one of the inspiratory end dividing connectors 1 is connected to the inspiratory end gas outlet 3 of the breathing machine, and the inspiratory end dividing connector gas inlets 101 of the remaining two N -1 inspiratory end dividing connector 1 are connected to the inspiratory end dividing connector gas outlets 102 of the other inspiratory end dividing connectors 1; 2 N The connection mode of the two expiratory end pressure measuring connectors 2 is the same as that of the twoN The connection mode of the inspiratory end shunt connector 1 is the same. N The inspiratory end shunt connector 1 is connected with each other, and the two N The expiratory end pressure measuring connector 2 is connected with each other, so that ventilation support treatment between multiple patients can be realized.

[0015] The ventilation loop connection device, preferably, the ventilation loop connection device can support up to 8 patients to breathe at the same time.

[0016] The ventilation loop connection device, preferably, the lower end side wall surface of the pressure measuring chamber 203 is provided with a scale line corresponding to the pressure measuring sheet fixing rod 207, the scale line includes a central "0" scale line 208 and two warning position scale lines 209 symmetrically distributed around the "0" scale line (208).

[0017] The ventilation loop connection device, preferably, the shape of the shunt chamber 103 and the pressure measuring chamber 203 includes any one of a rectangular parallelepiped, a cube, a cylinder, a circular truncated cone, or a cylinder with a regular polygonal cross section.

[0018] The ventilation loop connection device, preferably, the material of the shunt chamber 103 and the pressure measuring chamber 203 is transparent plastic, such as polyethylene PE, polypropylene PP, polyurethane PU, etc., so that the internal structure of the two can be observed.

[0019] The ventilation loop connection device, preferably, the inspiratory end filter 105 and the expiratory end filter 205 are both high efficiency particulate air (HEPA) filters, which can effectively filter bacteria and viruses, thereby avoiding cross infection.

[0020] The ventilation loop connection device, preferably, the inspiratory end shunt connector air inlet 101, the inspiratory end shunt connector air outlet 102, the expiratory end pressure measuring connector air outlet 201, and the expiratory end pressure measuring connector air inlet 202 all adopt a ventilation loop standard connector, which can realize precise connection with a standard loop and a breathing machine.

[0021] The second aspect of the present application provides a breathing machine, which includes a host computer, and further includes the ventilation loop connection device of the first aspect of the present application.

[0022] The third aspect of the present application provides a method for assembling the ventilation loop connecting device of the first aspect of the present application or the breathing machine of the second aspect of the present application, comprising the following specific steps:

[0023] (1) connecting the inspiratory end shunt connector gas inlet 101 with the inspiratory end gas outlet 3 of the breathing machine, and then connecting the inspiratory end shunt connector gas outlet 102 with the breathing machine end gas inlet 4 of the breathing loop;

[0024] (2) connecting the expiratory end pressure measuring connector gas outlet 201 with the expiratory end gas inlet 5 of the breathing machine, and then connecting the expiratory end pressure measuring connector gas inlet 202 of the breathing machine with the breathing machine end gas outlet 6 of the breathing loop.

[0025] The fourth aspect of the present application provides a method for treating lung diseases by using the ventilation loop connecting device of the first aspect of the present application or the breathing machine of the second aspect of the present application, comprising the following specific steps:

[0026] (1) connecting the inspiratory end shunt connector gas inlet 101 with the inspiratory end gas outlet 3 of the breathing machine, and then connecting the inspiratory end shunt connector gas outlet 102 with the breathing machine end gas inlet 4 of the breathing loop;

[0027] (2) connecting the expiratory end pressure measuring connector gas outlet 201 with the expiratory end gas inlet 5 of the breathing machine, and then connecting the expiratory end pressure measuring connector gas inlet 202 of the breathing machine with the breathing machine end gas outlet 6 of the breathing loop.

[0028] (3) wearing a set number of breathing masks on the heads of a set number of patients, turning on the breathing machine, and monitoring the breathing conditions of each patient in real time through the inspiratory end shunt connector 1 and the inspiratory end shunt connector 2. In the treatment method, during the ventilation support of the breathing machine for the patients (using pressure control ventilation mode), when the patient is in the inspiratory phase, the breathing machine blows gas from the inspiratory end shunt connector gas inlet 101 into the shunt chamber 103, the gas is shunted to the left chamber and the right chamber by the shunt piece 104, and then the gas enters the breathing machine end gas inlet 4 of the breathing loop connected thereto through the inspiratory end shunt connector gas outlet 102, completing the shunt. According to Bernoulli equation p+ρgh+(1 / 2)*ρv 2 =c, where p, ρ, v are the pressure, density and velocity of the fluid respectively; h is the vertical height; g is the acceleration of gravity; c is a constant. For gas, the gravity can be ignored, and the equation is simplified as p+(1 / 2)*ρv 2= constant (p0), where each term is called static, dynamic and total pressure respectively. Obviously, the flow velocity increases, the pressure decreases; the velocity decreases, the pressure increases. When the gas flow flows through the shunt plate 104, the chamber connected to the patient with poor lung compliance will have higher ventilation resistance, resulting in lower ventilation speed of the chamber at the same ventilation pressure in the pressure control ventilation mode, thereby causing the chamber to generate greater pressure on the shunt plate 104, thereby driving the shunt plate 104 to move to the opposite chamber to obtain a larger shunt cross-sectional area, so that the chamber obtains more gas flow to compensate for the ventilation deficiency caused by poor lung compliance; similarly, the ventilation overuse problem of the patient with relatively better lung compliance is also solved accordingly.

[0029] The treatment method, in use, in the process of ventilator supporting the patient's breathing (in the pressure control ventilation mode), when the patient is in the exhalation phase, the patient exhales gas through the breathing circuit from the gas inlet 202 of the exhalation pressure measuring connector into the pressure measuring chamber 203, and then pushes the pressure measuring plate 204 through the gas outlet 201 of the exhalation pressure measuring connector into the ventilator. When the ventilator supports the patient's breathing, when the patient's spontaneous breathing disappears, the pressure control ventilation mode is a time switching ventilation mode, so the patient's exhalation phase on both sides of the exhalation pressure measuring connector 2 is completely the same. When the tidal volume of the patients on both sides has no big difference, the gas flow through the pressure measuring chamber 203 is roughly equivalent, thereby generating the same pushing force on the pressure measuring plate 204, so that the pressure measuring plate 204 remains near the neutral position, i.e. near the "0" scale line. If the pressure measuring plate 204 always deviates from the "0" scale line and reaches the warning position scale line 209, it prompts the doctor or nurse to modify the ventilation scheme.

[0030] The present application has the following advantages due to the above technical scheme:

[0031] 1. The present application adds an inspiratory end shunt connector and an exhalation end pressure measuring connector between the ventilator and the circulation loop, which can simultaneously shunt the gas flow of the ventilator to multiple patients for breathing, greatly alleviating the problem of serious shortage of ventilators in emergency public health events.

[0032] 2、The present application sets a shunt piece in the shunt chamber of the inspiratory end shunt joint, which keeps dynamic balance according to the inspiratory volume of the patient on both sides of the gas outlet of the inspiratory end shunt joint, so that the gas can be provided to the patient in time and in proper amount according to the patient's demand; in addition, a pressure measuring piece is arranged in the pressure measuring chamber of the expiratory end pressure measuring joint, which keeps dynamic balance according to the expiratory volume of the patient on both sides of the gas inlet of the expiratory end pressure measuring joint, so that the patient's exhaled gas can be monitored in real time, to solve the problem of excessive or insufficient ventilation of the ventilator due to different lung compliance of patients, and avoid the problem that the actual tidal volume of different patients cannot be distinguished by the existing ventilator using a Y-shaped joint, so as to misjudge the ventilation effect;

[0033] 3、When multiple people use the same ventilator, the shunt piece arranged in the shunt chamber of the ventilation loop connecting device and the pressure measuring piece arranged in the pressure measuring chamber can separate the respiratory pathways of different patients, so as to effectively avoid cross infection of viruses and bacteria and environmental pollution;

[0034] 4、The inspiratory end shunt joint and the expiratory end pressure measuring joint in the present application can be replaced with each other, so that the clinical application is more simple and convenient.

[0035] 5、The device of the present application has simple structure, low cost, can be quickly produced and applied, and has strong popularization, so that it can be quickly obtained and applied in emergency public health events to save more lives. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is a structure and connection schematic diagram of the inspiratory end shunt joint in an embodiment of the present application;

[0037] Figure 2 It is a structure and connection schematic diagram of the expiratory end pressure measuring joint in an embodiment of the present application;

[0038] Figure 3 It is a schematic diagram of the initial state of the inspiratory end shunt joint in an embodiment of the present application;

[0039] Figure 4 It is a schematic diagram of the inspiratory end shunt joint reaching the balance state in an embodiment of the present application;

[0040] Figure 5 It is a schematic diagram of the initial state of the expiratory end pressure measuring joint in an embodiment of the present application;

[0041] Figure 6 It is a schematic diagram of the expiratory end pressure measuring joint reaching the balance state in an embodiment of the present application;

[0042] Figure 7 It is a structure schematic diagram of multiple inspiratory end shunt joints connected with each other in an embodiment of the present application;

[0043] The symbols in the figures are as follows:

[0044] 1- inspiratory end shunt connector, 101- inspiratory end shunt connector air inlet, 102- inspiratory end shunt connector air outlet, 103- shunt chamber, 104- sliding shunt plate, 105- inspiratory end filter, 106- inspiratory flow control plug, 107- shunt plate fixing rod; 2- expiratory end pressure measuring connector, 201- expiratory end pressure measuring connector air outlet, 202- expiratory end pressure measuring connector air inlet, 203- pressure measuring chamber, 204- sliding pressure measuring plate, 205- expiratory end filter, 206- expiratory flow control plug, 207- pressure measuring plate fixing rod, 208- "0" scale line, 209- warning scale line; 3- inspiratory end air outlet of the breathing machine; 4- breathing machine end air inlet of the breathing loop; 5- expiratory end air inlet of the breathing machine; 6- breathing machine end air outlet of the breathing loop. DETAILED DESCRIPTION

[0045] In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the present application are described clearly and completely below. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0046] Embodiment 1

[0047] As shown in Figure 1 , 2 , the present embodiment provides a ventilation loop connecting device for a breathing machine to support the respiration of two patients at the same time, comprising the following components:

[0048] The inspiratory end shunt connector 1 is in a cross-shaped structure with one end closed and three ends open. A shunt chamber 103 is formed in the inspiratory end shunt connector 1 and communicates with the three open ends. The open end of the inspiratory end shunt connector 1 opposite to the closed end forms an inspiratory end shunt connector air inlet 101. The other two open ends of the inspiratory end shunt connector 1 form two inspiratory end shunt connector air outlets 102, respectively.

[0049] A sliding shunt plate 104 is arranged in the shunt chamber 103, and the first end of the sliding shunt plate 104 is located in the closed end of the air inlet shunt connector 1, and the second end is located in the air inlet shunt connector air inlet 101, so as to divide the shunt chamber 103 into left and right chambers; a shunt plate sliding rod 107 is arranged in the closed end of the air inlet shunt connector 1, and the first end of the sliding shunt plate 104 is slidably connected to the shunt plate sliding rod 107. The sliding shunt plate 104 can freely slide on the shunt plate sliding rod 107, and the gas entering the air inlet shunt connector air inlet 101 is shunted to the two air inlet shunt connector air outlets 102 in different proportions, thereby avoiding excessive difference in gas flow of the two air inlet shunt connector air outlets 102; an air inlet filter 105 is arranged in the air inlet shunt connector air inlet 101 above the sliding shunt plate 104, and a gap is left between the air inlet filter 105 and the sliding shunt plate 104 for effective filtration of bacteria and viruses, thereby avoiding cross infection; an air inlet flow control plug 106 is fixed on the left and right side walls of the closed end of the air inlet shunt connector 1 respectively, for preventing the sliding shunt plate 104 from contacting the side walls of the left and right chambers, thereby preventing the sliding shunt plate 104 from being excessively close to one of the air inlet shunt connector air outlets 102 in extreme cases, causing air intake obstruction;

[0050] The air outlet pressure measuring connector 2 is in the form of a cross-shaped structure with one end closed and three ends open. The air outlet pressure measuring connector 2 has a pressure measuring chamber 203 formed therein and communicating with the three open ends thereof. The open end of the air outlet pressure measuring connector 2 opposite to the closed end thereof forms an air outlet pressure measuring connector air outlet 201, and the other two open ends of the air outlet pressure measuring connector 2 form two air outlet pressure measuring connector air inlets 202 respectively.

[0051] A sliding pressure plate 204 is arranged in the pressure chamber 203, which can freely slide in the pressure chamber 203 to shunt the gas entering the inspiratory end pressure connector inlet 202 to the two expiratory end pressure connector outlets 201 in different proportions; the first end of the sliding pressure plate 204 is located in the closed end of the expiratory end pressure connector 2, and the second end is located in the expiratory end pressure connector outlet 201 to divide the pressure chamber 203 into two chambers; a sliding pressure plate fixing rod 207 is arranged in the closed end of the expiratory end pressure connector 2, and the first end of the sliding pressure plate 204 is slidably connected to the sliding pressure plate fixing rod 207; the sliding pressure plate 204 can freely slide on the sliding pressure plate fixing rod 207 to shunt the gas entering the inspiratory end pressure connector inlet 202 to the two expiratory end pressure connector outlets 201 in different proportions, thereby avoiding excessive difference in gas flow between the two expiratory end pressure connector outlets 201; an expiratory end filter 205 is arranged in the expiratory end pressure connector outlet 201 above the sliding pressure plate 204, and a gap is left between the expiratory end filter 205 and the sliding pressure plate 204; an expiratory flow control plug 206 is fixed on the side wall of the closed end of the expiratory end pressure connector 2 near the two inspiratory end pressure connector inlets 202, which is used to prevent the sliding pressure plate 204 from contacting the side walls of the two chambers of the pressure chamber 203, thereby preventing the sliding pressure plate 204 from excessively approaching one of the inspiratory end pressure connector inlets 202 in extreme cases, which may cause gas outflow to be blocked.

[0052] Preferably, a scale line corresponding to the pressure plate fixing rod 207 is arranged on the lower end side wall surface of the pressure chamber 203, which includes a central "0" scale line 208 and two warning scale lines 209 symmetrically distributed around the "0" scale line 208. The shunt chamber 103 and the pressure chamber 203 can be used interchangeably, which is more convenient for storage, application and transportation, and can also avoid damage caused by connection errors.

[0053] Preferably, the shunt chamber 103 and the pressure chamber 203 are cuboids, and the materials of the shunt chamber 103 and the pressure chamber 203 are transparent plastic PE, so that the internal structures of the shunt chamber 103 and the pressure chamber 203 can be observed.

[0054] Preferably, the inspiratory end filter 105 and the expiratory end filter 205 are both high efficiency particulate air (HEPA) filters, which can effectively filter bacteria and viruses to avoid cross infection.

[0055] Example 2

[0056] like Figure 7 As shown, the difference between this embodiment and Embodiment 1 is that the number of the inspiratory end diverter 1 and the expiratory end pressure measuring connector 2 are 4 (2) N (N=2, N is a positive integer) The connection method of the four inspiratory end diverter connectors 1 is as follows: the inspiratory end diverter inlet 101 of one of the inspiratory end diverter connectors 1 is connected to the inspiratory end outlet 3 of the ventilator, and the inspiratory end diverter inlet 101 of each of the remaining three inspiratory end diverter connectors 1 is connected to the inspiratory end diverter outlet 102 of the other inspiratory end diverter connectors 1; the connection method of the four expiratory end pressure measuring connectors 2 is the same as the connection method of the four inspiratory end diverter connectors 1. The present invention uses four or more (2 N The intake end diverter 1 of each of the four or more (2) are connected to each other, so that four or more (2) N The expiratory end pressure measuring connectors 2 described above are interconnected, enabling multiple (2) N Ventilation support therapy between patients (number of patients).

[0057] Example 3

[0058] like Figures 1-6 As shown, this embodiment provides a treatment method for lung diseases using the ventilation loop connection device described in Embodiment 1. The specific steps are as follows:

[0059] (1) Connect the inlet 101 of the inspiratory end shunt connector to the inspiratory end outlet 3 of the ventilator, and then connect the outlet 102 of the inspiratory end shunt connector to the ventilator end inlet 4 of the breathing loop.

[0060] (2) Connect the outlet 201 of the expiratory end pressure measuring connector to the expiratory end inlet 5 of the ventilator, and then connect the inlet 202 of the expiratory end pressure measuring connector of the ventilator to the ventilator end outlet 6 of the breathing loop.

[0061] (3) Place the set number of breathing masks on the heads of the set number of patients, turn on the ventilator, and monitor the breathing status of each patient in real time through the inspiratory end shunt connector 1 and the inspiratory end shunt connector 2.

[0062] In the aforementioned treatment method, during the process of ventilator ventilation to support the patient's breathing (using pressure-controlled ventilation mode), when the patient is in the inspiratory phase, the ventilator injects gas from the inspiratory end shunt connector inlet 101 into the shunt chamber 103. The gas is shunted by the shunt plate 104 to the left and right chambers, and then the gas enters the ventilator end inlet 4 of the connected breathing loop through the inspiratory end shunt connector outlet 102, respectively, completing the shunt.

[0063] like Figure 3 As shown, when the shunt vane 104 is in its initial neutral position, airflow passes through both sides of the shunt vane 104. When the lung compliance of one patient is worse, the ventilation resistance on that side increases and the gas flow rate decreases. According to the simplified Bernoulli equation p + (1 / 2)*ρv 2 As can be seen from the constant (p0), the gas velocity in this side chamber decreases, the pressure on the flow divider 104 increases, pushing the flow divider 104 towards the opposite side chamber, increasing the cross-sectional area through which gas can pass in this side chamber. After the cross-sectional area through which gas can pass in this side chamber increases, the mechanical resistance of this side chamber decreases, the gas velocity increases, and the pressure on the flow divider 104 decreases. Similarly, in the opposite side chamber, because the cross-sectional area through which gas can pass decreases, the mechanical resistance increases, the gas velocity decreases, and the pressure on the flow divider 104 increases. Figure 4 As shown, when the pressures on both sides of the diverter 104 reach equilibrium, the diverter 104 is in a new equilibrium position. At this time, because the cross-sectional area through which gas can pass increases, the chamber on the side with poorer lung compliance will be diverted, increasing the initial ventilation gas volumetric flow rate and avoiding the risk of underventilation in the chamber on the side with poorer lung compliance; similarly, the ventilation gas volumetric flow rate in the chamber on the side with relatively better lung compliance decreases compared to the initial state, avoiding the risk of overventilation.

[0064] In the aforementioned treatment method, during the process of ventilator ventilation to support the patient's breathing (using pressure-controlled ventilation mode), when the patient is in the expiratory phase, the patient exhales gas through the breathing loop from the inlet 202 of the expiratory end pressure measuring connector into the pressure measuring chamber 203, pushes the pressure measuring plate 204, and then enters the ventilator through the outlet 201 of the expiratory end pressure measuring connector.

[0065] like Figure 5As shown, when the pressure sensing sheet 204 is in the initial neutral position corresponding to the surface scale "0" scale line 208 on the pressure sensing chamber 203, the pressure sensing sheet 204 is pushed by the gas flow from both sides, and the pressure control ventilation mode is time switching ventilation mode, so the patient's exhalation on both sides of the gas sensing connector 2 is exactly the same. When the tidal volume of the patients on both sides has no big difference, the gas flow through the pressure sensing chamber 203 is roughly equivalent, so that the pressure sensing sheet 204 is pushed equally to keep the pressure sensing sheet 204 in the neutral position, that is, near the surface scale "0" scale line 208 on the pressure sensing chamber 203. When the tidal volume of one side of the patient is significantly higher than the other side, the patient on the high tidal volume side needs to exhale more gas flow in the same time, so that the pressure sensing sheet 204 is pushed to move to the opposite chamber. The displacement of the pressure sensing sheet 204 reduces the cross-sectional area of the gas outflow passage in the opposite chamber, and under the condition that the gas flow per unit time is constant, the pressure of the opposite chamber on the pressure sensing sheet 204 will increase. As shown, when the pressure on both sides of the pressure sensing sheet 204 is equivalent, the pressure sensing sheet 204 stops sliding, at this time, when the surface scale on the pressure sensing chamber 203 corresponding to the pressure sensing sheet 204 prompts the difference in tidal volume of the patients on both sides. When the pressure sensing sheet 204 reaches or exceeds the warning position scale line 209, it indicates that the tidal volume of the patients on both sides has a large difference, and the doctor or nurse should consider whether to adopt other ventilation schemes. Figure 6 As shown, when the pressure on both sides of the pressure sensing sheet 204 is equivalent, the pressure sensing sheet 204 stops sliding, at this time, when the surface scale on the pressure sensing chamber 203 corresponding to the pressure sensing sheet 204 prompts the difference in tidal volume of the patients on both sides. When the pressure sensing sheet 204 reaches or exceeds the warning position scale line 209, it indicates that the tidal volume of the patients on both sides has a large difference, and the doctor or nurse should consider whether to adopt other ventilation schemes.

[0066] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A ventilation loop connection device specifically for ventilators, characterized in that, include: The intake end diverter (1) has a cross-shaped structure with one end closed and three ends open. The intake end diverter (1) has a diverter chamber (103) inside which is connected to all three open ends. The open end of the intake end diverter (1) opposite to the closed end forms the intake end diverter inlet (101). The other two open ends of the intake end diverter (1) respectively form the intake end diverter outlet (102). A sliding diverter plate (104) is provided in the diversion chamber (103). The sliding diverter plate (104) can slide freely in the diversion chamber (103) to divert the gas entering the inlet (101) of the intake end diverter to the outlet (102) of the two intake end diverters in different proportions. The expiratory end pressure measuring connector (2) has a cross-shaped structure with one end closed and three ends open. The expiratory end pressure measuring connector (2) has a pressure measuring chamber (203) that is connected to all three open ends. The open end of the expiratory end pressure measuring connector (2) opposite to the closed end forms the expiratory end pressure measuring connector outlet (201). The other two open ends of the expiratory end pressure measuring connector (2) respectively form two expiratory end pressure measuring connector inlets (202). A sliding pressure measuring plate (204) is provided in the pressure measuring chamber (203). The sliding pressure measuring plate (204) can slide freely in the pressure measuring chamber (203) to divert the gas entering the inlet (202) of the exhalation end pressure measuring connector to the outlet (201) of the two exhalation end pressure measuring connectors in different proportions. The first end of the sliding diverter (104) is located inside the closed end of the intake diverter (1), and the second end is located inside the intake diverter inlet (101) to divide the diverter chamber (103) into two chambers; a diverter sliding rod (107) is provided inside the closed end of the intake diverter (1), and the first end of the sliding diverter (104) is slidably connected to the diverter sliding rod (107), allowing the sliding diverter (104) to slide freely on the diverter sliding rod (107); and, The first end of the sliding pressure measuring pad (204) is located inside the closed end of the expiratory pressure measuring connector (2), and the second end is located inside the outlet (201) of the expiratory pressure measuring connector, so as to divide the pressure measuring chamber (203) into two chambers; a sliding pressure measuring pad fixing rod (207) is provided inside the closed end of the expiratory pressure measuring connector (2), and the first end of the sliding pressure measuring pad (204) is slidably connected to the sliding pressure measuring pad fixing rod (207), and the sliding pressure measuring pad (204) can slide freely on the sliding pressure measuring pad fixing rod (207); An intake filter (105) is provided inside the intake port (101) of the intake end splitter located above the sliding splitter plate (104), and a gap is left between the intake filter (105) and the sliding splitter plate (104); and / or, An exhalation end filter (205) is provided in the air outlet (201) of the exhalation end pressure measuring connector located above the sliding pressure measuring plate (204), and a gap is left between the exhalation end filter (205) and the sliding pressure measuring plate (204); An air intake control plug (106) is fixed on the closed end sidewall of the air intake end splitter (1) near the air outlet (102) of the two air intake end splitter connectors, respectively, to prevent the sliding splitter plate (104) from contacting the sidewalls of the two chambers of the splitter chamber (103); and / or, An exhalation flow control plug (206) is fixed on the closed end sidewall of the exhalation end pressure measuring connector (2) near the air inlet (202) of the two exhalation end pressure measuring connectors, to prevent the sliding pressure measuring plate (204) from contacting the two chamber sidewalls of the pressure measuring chamber (203).

2. The ventilation loop connection device according to claim 1, characterized in that, The number of the inspiratory end shunt connector (1) and the expiratory end pressure measuring connector (2) are 2 each. N 1, N is a positive integer, 2 N The connection method of the inspiratory end diverter (1) is as follows: the inspiratory end diverter inlet (101) of one of the inspiratory end diverter (1) is connected to the inspiratory end outlet (3) of the ventilator, and the remaining 2 N -1 The intake port (101) of each of the intake port splitters (1) is connected to the intake port outlet (102) of the other intake port splitters (1); 2 N The connection method of the expiratory end pressure measuring connector (2) is the same as that of 2 N The connection method of each of the intake end diverter (1) is the same.

3. The ventilation loop connection device according to claim 1, characterized in that, The lower side wall of the pressure measuring chamber (203) is provided with scale lines corresponding to the pressure measuring plate fixing rod (207). The scale lines include a central "0" position scale line (208) and two warning position scale lines (209) symmetrically distributed with the "0" position scale line (208) as the center.

4. The ventilation loop connection device according to any one of claims 1 to 3, characterized in that, The shape of the diversion chamber (103) and the pressure measuring chamber (203) includes any one of the following: cuboid, cylinder, frustum, or cylinder with a regular polygonal cross-section.

5. A ventilator, comprising a main unit, characterized in that, It also includes the ventilation loop connection device as described in any one of claims 1 to 4.

6. A ventilation loop connection device according to any one of claims 1 to 4 or a method for assembling a ventilator according to claim 5, characterized in that, The specific steps include the following: (1) Connect the inlet (101) of the inspiratory end shunt connector to the inspiratory end outlet (3) of the ventilator, and then connect the outlet (102) of the inspiratory end shunt connector to the ventilator end inlet (4) of the breathing loop. (2) Connect the outlet (201) of the expiratory end pressure measuring connector to the expiratory end inlet (5) of the ventilator, and then connect the inlet (202) of the expiratory end pressure measuring connector of the ventilator to the ventilator end outlet (6) of the breathing loop.

Images