Chest drainage device

Abstract

The chest drainage device comprises a collecting container and a main machine, the collecting container comprises a drainage tube, a machine box and a connecting piece, the machine box and the connecting piece are connected, the machine box is provided with a hydrops cavity communicated with the drainage tube, and the connecting piece is provided with a pump air exhaust channel communicated with the hydrops cavity; the main machine comprises a negative pressure source and a one-way valve, the negative pressure source is communicated with the pump air suction channel through a first pipeline, the negative pressure source can suck to enable the liquid accumulation cavity to be in negative pressure, and the one-way valve is arranged on the first pipeline and used for enabling air in the first pipeline to flow to the negative pressure source in a one-way mode. When the main machine is powered off, the negative pressure source loses power, at the moment, the one-way valve enables the pump exhaust channel to be closed and not to be communicated with the outside, even if the chest drainage device forms a closed container, the chest drainage device can continue drainage in a gravity type drainage mode, and residual liquid and residual gas in the chest of a patient can still flow into the hydrops cavity through the drainage tube.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a chest drainage device. Background Art

[0002] The chest drainage device includes a main unit and a collection container connected to each other. The collection container is connected to the patient through a drainage tube. The main unit is provided with a negative pressure source connected to the collection container. The negative pressure source can draw suction, thereby generating negative pressure in the collection container, and then draw the residual fluid and residual gas in the chest cavity through the drainage tube, so that negative pressure is quickly formed in the pleural cavity. In the related art, if the main unit suddenly loses power during use, the chest drainage device cannot continue chest drainage, resulting in suspension of treatment and harm to the patient's personal safety. Summary of the invention

[0003] Based on this, it is necessary to provide a chest drainage device to address the problem that the chest drainage device cannot continue to be used when the power is off.

[0004] A chest drainage device, comprising:

[0005] A collecting container, comprising a drainage tube and a chassis and a connecting piece connected thereto, wherein the chassis is provided with a fluid accumulation cavity communicated with the drainage tube, and the connecting piece is provided with a pump suction channel communicated with the fluid accumulation cavity;

[0006] The main unit includes a negative pressure source and a one-way valve. The negative pressure source is connected to the pump suction channel through a first pipeline. The negative pressure source can suction to make the effusion cavity have a negative pressure. The one-way valve is arranged on the first pipeline. The one-way valve is used to make the gas in the first pipeline flow unidirectionally to the negative pressure source.

[0007] In one of the embodiments, a detection mechanism is provided on the host, and the connecting piece is provided with a pressure detection channel connecting the detection mechanism and the fluid accumulation chamber, and the detection mechanism is used to detect the pressure in the fluid accumulation chamber.

[0008] In one embodiment, the host further includes a solenoid valve and a three-way tube, wherein a first interface of the three-way tube is connected to the pressure detection channel, a second interface of the three-way tube is connected to the detection mechanism, and a third interface of the three-way tube is connected to the solenoid valve, and the solenoid valve has an open state and a closed state. When in the open state, the solenoid valve can be opened to connect the outside world and the three-way tube, and when in the closed state, the solenoid valve can be closed to seal the gas in the chest drainage device.

[0009] In one of the embodiments, the connecting member includes a shell and a pressure relief member installed on the shell, and the pressure relief member is used to relieve pressure when the pressure inside the shell exceeds a preset value.

[0010] In one embodiment, the housing is provided with an air vent, the pressure relief member is a dry seal valve disposed in the housing, the dry seal valve includes an air inlet and an air outlet, and a diaphragm is disposed inside the dry seal valve;

[0011] When the pressure in the collection container is not greater than the preset value, the diaphragm separates the air inlet and the air outlet. When the pressure in the collection container is greater than the preset value, the diaphragm can shift under the action of the pressure difference to connect the air inlet and the air outlet.

[0012] In one embodiment, a vent hole is provided on the shell, and the pressure relief member is a pressure release member movably connected to the vent hole;

[0013] When the pressure in the collection container is not greater than the preset value, the pressure release piece covers and seals the air hole. When the pressure in the collection container is greater than the preset value, the pressure release piece can be blown up under the action of the pressure difference to separate from the air hole.

[0014] In one of the embodiments, the chest drainage device further comprises a sealing unit, and when the collection container is separated from the host, the sealing unit can block the pump suction channel.

[0015] In one embodiment, the sealing unit includes a first sealing part and a first elastic part mounted on the first sealing part, the first sealing part slidingly cooperates with the pump suction channel, and the first elastic part is used to push the first sealing part to slide under its own elastic action to block the pump suction channel.

[0016] In one embodiment, the sealed unit includes a first filter element arranged in the pump suction channel. When the collection container is separated from the main unit, the liquid in the liquid accumulation chamber flows into the pump suction channel to cause the first filter element to expand to block the pump suction channel.

[0017] In one embodiment, the host is provided with a detection mechanism, the connecting piece is provided with a pressure detection channel connecting the detection mechanism and the fluid accumulation chamber, and the detection mechanism is used to detect the pressure in the fluid accumulation chamber;

[0018] The chest drainage device further comprises a sealing component, and when the collection container is separated from the host, the sealing component can block the pressure detection channel.

[0019] In the above-mentioned chest drainage device, one end of the pump suction channel is connected to the effusion cavity, and the other end is connected to the first pipeline. The pump suction channel is further connected to the negative pressure source through the first pipeline. When the host is powered, the negative pressure source performs suction, so that the gas in the effusion cavity is discharged from the effusion cavity through the pump suction channel and the first pipeline in turn, so that a negative pressure is formed in the effusion cavity, and the residual liquid and residual gas in the patient's chest cavity can flow into the effusion cavity through the drainage tube. The one-way valve arranged on the first pipeline limits the flow direction of the gas in the first pipeline, so that it can only flow in the direction from the pump suction channel to the negative pressure source. When the host is powered off, the negative pressure source loses power. At this time, the one-way valve makes the pump suction channel closed and not connected to the outside world, that is, the one-way valve makes the chest drainage device form a closed container. At this time, the chest drainage device can continue to drain by gravity drainage, and the residual liquid and residual gas in the patient's chest cavity can still flow into the effusion cavity through the drainage tube. The chest drainage device provided in the present application can continue to perform chest drainage if the host suddenly loses power during use, and treatment will not be suspended. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of the connection between the collection container and the host provided in an embodiment of the present application.

[0021] Figure 2 A schematic diagram of the structure of the collection container and the connecting piece provided in an embodiment of the present application.

[0022] Figure 3 This is a schematic diagram of the structure in which a one-way valve and a solenoid valve are installed in the host provided in an embodiment of the present application.

[0023] Figure 4 This is a schematic diagram of the structure of the connecting piece provided in Example 1 of the present application.

[0024] Figure 5 This is an exploded view of the connecting piece provided in Example 1 of the present application.

[0025] Figure 6 This is a cross-sectional view of the connecting piece provided in Example 1 of the present application when connected to the host.

[0026] Figure 7 This is a cross-sectional view of the sealed unit provided in Example 1 of the present application when blocking the pump suction channel.

[0027] Figure 8 This is a schematic diagram of the structure of the connecting piece provided in Example 2 of the present application.

[0028] Fig. 9 This is an exploded view of the connecting piece provided in Example 2 of the present application.

[0029] Fig.10 This is a cross-sectional view of the connecting piece provided in the second embodiment of the present application when connected to the host.

[0030] Fig.11 This is a cross-sectional view of the sealed unit provided in the second embodiment of the present application when blocking the pump suction channel.

[0031] Fig.12 A cross-sectional view of a collection container provided in an embodiment of the present application.

[0032] In the figure:

[0033] 100, host; 110, one-way valve; 120, solenoid valve;

[0034] 200. Collection container;

[0035] 300, drainage tube;

[0036] 400, chassis; 410, fluid accumulation chamber;

[0037] 500, connector;

[0038] 510, housing; 511, air vent; 512, first conduction interface; 513, second conduction interface; 514, mounting plate; 515, mounting hole; 520, first filter element; 530, pressure relief member; 531, exhaust hole; 540, pump exhaust channel; 550, pressure detection channel; 560, second filter element;

[0039] 570, sealing unit; 571, first sealing member; 5711, first sealing portion; 5712, second sealing portion; 572, first elastic member;

[0040] 580. Sealing component; 581. Second sealing component; 582. Second elastic component. DETAILED DESCRIPTION

[0041] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0042] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0043] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0044] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0045] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0046] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0047] The present application provides a chest drainage device, such as Figures 1 to 3 As shown, the chest drainage device includes a collecting container 200 and a main unit 100, the collecting container 200 includes a drainage tube 300 and a chassis 400 and a connecting piece 500 connected thereto, the chassis 400 is provided with a fluid collection cavity 410 connected to the drainage tube 300, and the connecting piece 500 is provided with a pump suction channel 540 connected to the fluid collection cavity 410; the main unit 100 includes a negative pressure source and a one-way valve 110, the negative pressure source is connected to the pump suction channel 540 through a first pipeline, the negative pressure source can suction to make the fluid collection cavity 410 have a negative pressure, the one-way valve 110 is provided on the first pipeline, and the one-way valve 110 is used to make the gas in the first pipeline flow to the negative pressure source in one direction.

[0048] In the above-mentioned chest drainage device, one end of the pump suction channel 540 is connected to the effusion cavity 410, and the other end is connected to the first pipeline. The pump suction channel 540 is further connected to the negative pressure source through the first pipeline. When the host 100 is powered, the negative pressure source performs suction, so that the gas in the effusion cavity 410 is discharged from the effusion cavity 410 through the pump suction channel 540 and the first pipeline in turn, thereby forming a negative pressure in the effusion cavity 410, and the residual fluid and residual gas in the patient's chest cavity can flow into the effusion cavity 410 through the drainage tube 300. The one-way valve 110 provided on the first pipeline limits the flow direction of the gas in the first pipeline, so that it can only flow along the direction from the pump suction channel 540 to the negative pressure source. When the host 100 is powered off, the negative pressure source loses power. At this time, the one-way valve 110 makes the pump suction channel 540 closed and not connected to the outside world, that is, the one-way valve 110 makes the chest drainage device form a closed container. At this time, the chest drainage device can continue to drain by gravity drainage, and the residual liquid and residual gas in the patient's chest cavity can still flow into the effusion cavity 410 through the drainage tube 300. The chest drainage device provided by the present application can continue to perform chest drainage if the host 100 is suddenly powered off during use, and the chest drainage device will not cause treatment suspension.

[0049] In some embodiments, Figures 1 to 3As shown, the host 100 is provided with a detection mechanism, and the connector 500 is provided with a pressure detection channel 550 connecting the detection mechanism and the fluid accumulation chamber 410, and the detection mechanism is used to detect the pressure in the fluid accumulation chamber 410. The detection mechanism is provided on the host 100, and the detection mechanism is connected with the fluid accumulation chamber 410 through the pressure detection channel 550, so that the detection mechanism detects the pressure in the fluid accumulation chamber 410.

[0050] In a specific embodiment, the detection mechanism includes a gas pressure sensor, and the gas pressure sensor is used to detect the gas pressure transmitted by the pressure detection channel 550.

[0051] In some embodiments, Figures 1 to 3 As shown, the host 100 also includes a solenoid valve 120 and a three-way pipe, the first interface of the three-way pipe is connected to the pressure detection channel 550, the second interface of the three-way pipe is connected to the detection mechanism, and the third interface of the three-way pipe is connected to the solenoid valve 120. The solenoid valve 120 has an open state and a closed state. When in the open state, the solenoid valve 120 can be opened to connect the outside world and the three-way pipe, and when in the closed state, the solenoid valve 120 can be closed to seal the gas in the chest drainage device. The solenoid valve 120 is set, and when the solenoid valve 120 is in the open state, the three-way pipe is connected to the outside world, that is, the effusion cavity 410 and the pressure detection channel 550 are connected to the outside world, and the gas in the effusion cavity 410 and the pressure detection channel 550 can flow to the outside world through the third interface of the three-way valve and the solenoid valve 120 in sequence to achieve pressure relief. When the solenoid valve 120 is in a closed state, that is, the effusion cavity 410, the pressure detection channel 550 and the three-way tube are connected and are in a closed state as a whole, the gas in the effusion cavity 410, the pressure detection channel 550 and the three-way tube, that is, the gas in the chest drainage device cannot be discharged to the outside, that is, the chest drainage device as a whole is closed. At this time, the chest drainage device can perform chest drainage by gravity drainage.

[0052] In a specific embodiment, the host 100 further includes an electrically connected controller and a solenoid valve 120. After the sealing test is completed after the power-on, the controller controls the solenoid valve 120 to open to release pressure. After the pressure release is completed, the controller controls the solenoid valve 120 to be in a closed state.

[0053] In summary, when the host 100 is powered off, the one-way valve 110 and the solenoid valve 120 are provided so that the chest drainage device as a whole is in a closed state, and at this time the chest drainage device can perform chest drainage by gravity drainage.

[0054] When the host 100 is powered on, the negative pressure source is constantly pumping, so the collection container 200 is in a negative pressure state, and the collection container 200 is not prone to excessive internal pressure. However, when the host 100 is powered off, although the chest drainage device can drain by gravity, the gas in the collection container 200 is not easy to be discharged, resulting in excessive pressure in the collection container 200, which in turn causes the collection container 200 to explode.

[0055] To this end, in some embodiments, such as Figure 2 , Figures 4 to 7 As shown, the connector 500 includes a housing 510 and a pressure relief member 530 disposed on the housing 510, and the pressure relief member 530 is used to relieve pressure when the pressure inside the housing 510 exceeds a preset value. By arranging the pressure relief member 530 on the housing 510 of the connector 500, when the pressure inside the housing 510 of the connector 500 is greater than the preset pressure value, the pressure relief member 530 will relieve pressure, thereby reducing the pressure inside the housing 510, and also reducing the pressure inside the collection container 200.

[0056] In some embodiments, Figures 4 to 7 As shown, an air vent 511 is provided on the shell 510, and the pressure relief member 530 is a dry-sealed valve arranged in the shell 510. The dry-sealed valve includes an air inlet hole and an air exhaust hole 531, and a diaphragm is provided inside the dry-sealed valve; when the pressure in the collection container 200 is not greater than a preset value, the diaphragm separates the air inlet hole and the air exhaust hole 531, and when the pressure in the collection container 200 is greater than a preset value, the diaphragm can shift under the action of the pressure difference to connect the air inlet hole and the air exhaust hole 531. A dry sealing valve is arranged in the shell 510. When the pressure in the shell 510 is not greater than the preset pressure, the diaphragm inside the dry sealing valve separates the air inlet hole and the exhaust hole 531, and the gas in the shell 510 cannot flow through the exhaust hole 531 to the air vent 511 for discharge, thereby preventing the pressure in the shell 510 from leaking out. When the pressure in the shell 510 is greater than the preset pressure, the diaphragm of the dry sealing valve can shift under the action of the pressure difference, and the air inlet hole and the exhaust hole 531 are connected, that is, the air inlet hole, the exhaust hole 531 and the air vent 511 are connected, and the gas in the shell 510 is discharged to the outside of the shell 510 through the air inlet hole, the exhaust hole 531 and the air vent 511 in turn, thereby relieving the pressure of the shell 510, reducing the pressure in the shell 510, and also reducing the pressure in the collection container 200.

[0057] In a specific embodiment, if Figures 4 to 7As shown, a mounting plate 514 is provided in the housing 510, and the mounting plate 514 divides the inner cavity of the housing 510 into a first accommodating cavity and a second accommodating cavity arranged along the gravity direction. A mounting hole 515 connecting the first accommodating cavity and the second accommodating cavity is provided on the mounting plate 514, and the air vent 511 is connected to the first accommodating cavity. The dry seal valve is provided in the first accommodating cavity and connected to the hole wall of the mounting hole 515, and the pump suction channel 540 is provided in the second accommodating cavity. When the pressure in the second accommodating cavity is greater than the preset value, the air pressure in the second accommodating cavity enters the interior of the dry seal valve through the air inlet of the dry seal valve, causing the diaphragm to move, thereby connecting the air inlet and the exhaust hole 531 of the dry seal valve, and then causing the gas in the second accommodating cavity to flow into the first accommodating cavity through the air inlet and the exhaust hole 531 in turn, while the gas in the first accommodating cavity is discharged to the outside through the air vent 511 to achieve pressure relief.

[0058] In some embodiments, Figures 8 to 12 As shown, the housing 510 is provided with an air hole 511, and the pressure relief member 530 is a pressure release member movably connected to the air hole 511; when the pressure in the collection container 200 is not greater than the preset value, the pressure release member covers and seals the air hole 511, and when the pressure in the collection container 200 is greater than the preset value, the pressure release member can be blown up under the action of the pressure difference to separate from the air hole 511. When the pressure inside the housing 510 is greater than the preset value, the pressure release member moves under the action of the pressure difference, so that the gas in the connecting member 500 is discharged through the air hole 511. When in the second state, the pressure inside the housing 510 is less than or equal to the preset value, and the pressure release member blocks the air hole 511 to prevent the gas in the housing 510 of the connecting member 500 from being discharged.

[0059] In a specific embodiment, if Figures 8 to 11 As shown, the pressure release piece is movably connected to the air vent 511. When the pressure in the shell 510 is less than a preset value, the pressure release piece covers and seals the air vent 511. When the pressure in the shell 510 is greater than the preset value, the pressure release piece is blown up under the action of the pressure difference to separate from the air vent 511. The preset value is greater than the atmospheric pressure.

[0060] Please refer back to Figures 4 to 7 The chest drainage device further includes a sealing unit 570, which can block the pump suction channel 540 when the collection container 200 is separated from the host 100. By providing the sealing unit 570, when the collection container 200 is separated from the host 100, the pump suction channel 540 is blocked by the sealing unit 570, so that the collection container 200 forms a sealed whole alone, that is, the collection container 200 can be used alone to achieve gravity drainage.

[0061] In a specific embodiment, if Figures 4 to 7As shown, the sealing unit 570 includes a first sealing member 571 and a first elastic member 572 sleeved on the first sealing member 571. The first sealing member 571 is slidably matched with the pump suction channel 540. The first elastic member 572 is used to push the first sealing member 571 to slide under its own elastic action to block the pump suction channel 540. By providing the first sealing member 571, the first sealing member 571 can at least partially slide in the pump suction channel 540. When sliding to the first position, the pump suction channel 540 can be blocked. When sliding to the second position, the pump suction channel 540 can be exposed. By providing the first elastic member 572 on the first sealing member 571, the first elastic member 572 can be elastically reset to push the first sealing member 571 to switch from the second position to the first position.

[0062] In a specific embodiment, if Figures 4 to 7 As shown, the first sealing member 571 includes a first sealing portion 5711 and a second sealing portion 5712 that are connected to each other. The first sealing portion 5711 is slidably matched with the pump suction channel 540. When the second sealing portion 5712 is in the first position, it can abut against the end of the pump suction channel 540 to block the pump suction channel 540. When the second sealing portion 5712 is in the second position, the pump suction channel 540 can be exposed.

[0063] In a specific embodiment, if Figures 4 to 7 As shown, the first elastic member 572 is a spring.

[0064] In some embodiments, Figures 4 to 7 As shown, the host 100 is provided with a detection mechanism, and the connector 500 is provided with a pressure detection channel 550 connecting the detection mechanism and the effusion cavity 410, and the detection mechanism is used to detect the pressure in the effusion cavity 410; the chest drainage device also includes a sealing component 580, and when the collection container 200 is separated from the host 100, the sealing component 580 can block the pressure detection channel 550. By providing the sealing component 580, when the collection container 200 is separated from the host 100, the sealing component 580 blocks the pressure detection channel 550, and the sealing unit 570 blocks the pump suction channel 540, so that after the collection container 200 is separated from the host 100, the collection container 200 as a whole forms a closed structure, and the collection container 200 can achieve gravity drainage alone.

[0065] In a specific embodiment, if Figures 4 to 7 As shown, the connecting member 500 further includes a second filter element 560, and the second filter element 560 is disposed in the pressure detection channel 550. By disposing the second filter element 560, the gas passing through the pressure detection channel 550 is filtered.

[0066] In some embodiments, Figures 4 to 7As shown, the structure of the sealing component 580 is the same as that of the sealing unit 570, and no further details are given here. In some embodiments, the structure of the sealing component 580 is different from that of the sealing unit 570, for example, the sealing component 580 includes a piston member, as long as the sealing component 580 can block the pressure detection channel 550 when the host 100 and the collection container 200 are separated.

[0067] In some embodiments, Figures 4 to 7 As shown, the housing 510 is provided with a first conductive interface 512 connecting the pump suction channel 540 and the liquid accumulation chamber 410 , and the housing 510 is also provided with a second conductive interface 513 connecting the pressure detection channel 550 and the liquid accumulation chamber 410 .

[0068] In some embodiments, Figures 8 to 12 As shown, the closed unit 570 includes a first filter element 520 disposed in the pump suction channel 540. When the collection container 200 is separated from the host 100, the liquid in the effusion cavity 410 flows into the pump suction channel 540 to expand the first filter element 520 to block the pump suction channel 540. By setting the first filter element 520, when the collection container 200 is separated from the host 100, the liquid in the effusion cavity 410 flows into the pump suction channel 540, and the first filter element 520 absorbs the liquid and expands to block the pump suction channel 540. At this time, the collection container 200 is a sealed whole, so the collection container 200 can use gravity drainage to achieve chest drainage.

[0069] In summary, when the host 100 and the collection container 200 are connected, if the host 100 is powered off, the one-way valve 110 and the solenoid valve 120 provided on the host 100 can keep the host 100 and the collection container 200 airtight, so that the chest drainage device can achieve gravity drainage;

[0070] When the host 100 and the collection container 200 are separated, the pump suction channel 540 can be sealed by the sealing unit 570, and the pressure detection channel 550 can be sealed by the sealing component 580, so that the collection container 200 can be used alone to achieve gravity drainage.

[0071] A sealing component 580 is provided on the connecting member 500 to relieve the pressure of the collecting container 200 and prevent the pressure in the collecting container 200 from being too high.

[0072] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A chest drainage device, characterized in that: The chest drainage device comprises: A collecting container, comprising a drainage tube and a chassis and a connecting piece connected thereto, wherein the chassis is provided with a fluid accumulation cavity communicated with the drainage tube, and the connecting piece is provided with a pump suction channel communicated with the fluid accumulation cavity; The main unit includes a negative pressure source and a one-way valve. The negative pressure source is connected to the pump suction channel through a first pipeline. The negative pressure source can suction to make the effusion cavity have a negative pressure. The one-way valve is arranged on the first pipeline. The one-way valve is used to make the gas in the first pipeline flow unidirectionally to the negative pressure source.

2. The chest drainage device according to claim 1, characterized in that: The host is provided with a detection mechanism, the connecting piece is provided with a pressure detection channel connecting the detection mechanism and the fluid accumulation cavity, and the detection mechanism is used to detect the pressure in the fluid accumulation cavity.

3. The chest drainage device according to claim 2, characterized in that: The host also includes a solenoid valve and a three-way pipe, a first interface of the three-way pipe is connected to the pressure detection channel, a second interface of the three-way pipe is connected to the detection mechanism, and a third interface of the three-way pipe is connected to the solenoid valve. The solenoid valve has an open state and a closed state. When in the open state, the solenoid valve can be opened to connect the outside world and the three-way pipe. When in the closed state, the solenoid valve can be closed to seal the gas in the chest drainage device.

4. The chest drainage device according to claim 1, characterized in that: The connecting member comprises a shell and a pressure relief member mounted on the shell, and the pressure relief member is used for relieving pressure when the internal pressure of the shell exceeds a preset value.

5. The chest drainage device according to claim 4, characterized in that: The shell is provided with an air vent, the pressure relief member is a dry seal valve arranged in the shell, the dry seal valve includes an air inlet and an air outlet, and a diaphragm is arranged inside the dry seal valve; When the pressure in the collection container is not greater than the preset value, the diaphragm separates the air inlet and the air outlet. When the pressure in the collection container is greater than the preset value, the diaphragm can shift under the action of the pressure difference to connect the air inlet and the air outlet.

6. The chest drainage device according to claim 4, characterized in that: The shell is provided with an air vent, and the pressure relief member is a pressure release member movably connected to the air vent; When the pressure in the collection container is not greater than the preset value, the pressure release piece covers and seals the air hole. When the pressure in the collection container is greater than the preset value, the pressure release piece can be blown up under the action of the pressure difference to separate from the air hole.

7. The chest drainage device according to claim 1, characterized in that: The chest drainage device further comprises a sealing unit, which can block the pump suction channel when the collection container is separated from the host.

8. The chest drainage device according to claim 7, characterized in that: The sealing unit includes a first sealing member and a first elastic member sleeved on the first sealing member, the first sealing member slidably cooperates with the pump suction channel, and the first elastic member is used to push the first sealing member to slide under its own elastic action to block the pump suction channel.

9. The chest drainage device according to claim 7, characterized in that: The sealing unit includes a first filter element arranged in the pump suction channel. When the collection container is separated from the host, the liquid in the liquid accumulation chamber flows into the pump suction channel to expand the first filter element to block the pump suction channel.

10. The chest drainage device according to claim 1, characterized in that: The host is provided with a detection mechanism, the connecting piece is provided with a pressure detection channel connecting the detection mechanism and the fluid accumulation cavity, and the detection mechanism is used to detect the pressure in the fluid accumulation cavity; The chest drainage device further comprises a sealing component, and when the collection container is separated from the host, the sealing component can block the pressure detection channel.

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