Drainage device for the thoracic cavity

Abstract

This application relates to a chest drainage device, comprising a collection container and a main unit. The collection container includes a drainage tube and a connected housing and connector. The housing has a effusion chamber communicating with the drainage tube, and the connector has a pump suction channel communicating with the effusion chamber. 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, and the negative pressure source can draw air to create a negative pressure in the effusion chamber. The one-way valve is located on the first pipeline and is used to allow gas in the first pipeline to flow unidirectionally to the negative pressure source. When the main unit is powered off, the negative pressure source loses power. At this time, the one-way valve seals the pump suction channel, preventing communication with the outside. Even if the chest drainage device forms a sealed container, the chest drainage device can continue to drain via gravity, and residual fluid and gas in the patient's chest cavity can still flow into the effusion chamber through the drainage tube.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a chest drainage device. Background Technology

[0002] The chest drainage device includes a main unit and a collection container connected together. The collection container is connected to the patient via a drainage tube. A negative pressure source connected to the collection container is installed in the main unit. This negative pressure source can draw in suction, creating negative pressure in the collection container. This negative pressure is then drawn in through the drainage tube to remove residual pleural fluid and air, rapidly establishing negative pressure in the pleural cavity. In this technology, if the main unit suddenly loses power during use, the chest drainage device cannot continue chest drainage, causing treatment to be interrupted and endangering the patient's safety. Summary of the Invention

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

[0004] A chest drainage device, the chest drainage device comprising:

[0005] A collection container includes a drainage tube and a connected housing and connectors. The housing is provided with a liquid collection chamber communicating with the drainage tube, and the connectors are provided with a pump suction channel communicating with the liquid collection chamber.

[0006] The main unit includes a negative pressure source and a one-way valve. The negative pressure source is connected to the pump's air extraction channel through a first pipeline. The negative pressure source can draw in air to make the liquid accumulation chamber negative. The one-way valve is installed on the first pipeline and is used to allow the gas in the first pipeline to flow unidirectionally to the negative pressure source.

[0007] In one embodiment, the host is provided with a detection mechanism, and the connector is provided with a pressure detection channel connecting the detection mechanism and the liquid accumulation chamber. The detection mechanism is used to detect the pressure in the liquid accumulation chamber.

[0008] In one embodiment, the main unit further includes a solenoid valve and a three-way pipe. The first port of the three-way pipe is connected to the pressure detection channel, the second port of the three-way pipe is connected to the detection mechanism, and the third port of the three-way pipe is connected to the solenoid valve. The solenoid valve has an open state and a closed state. When it is in the open state, the solenoid valve can open to connect the outside world and the three-way pipe. When it is in the closed state, the solenoid valve can close to seal the gas in the chest drainage device.

[0009] In one embodiment, the connector includes a housing and a pressure relief member mounted on the housing, the pressure relief member being used to release pressure when the pressure inside the housing exceeds a preset value.

[0010] In one embodiment, the housing is provided with a vent hole, and the pressure relief component is a dry-seal valve disposed inside the housing. The dry-seal valve includes an air inlet and an air outlet, and a diaphragm is provided inside the dry-seal valve.

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

[0012] In one embodiment, the housing is provided with a vent hole, and the pressure relief component is a pressure relief component movably connected to the vent hole;

[0013] When the pressure inside the collection container is not greater than the preset value, the pressure release element covers and seals the vent hole. When the pressure inside the collection container is greater than the preset value, the pressure release element can be blown up under the action of the pressure difference to detach from the vent hole.

[0014] In one embodiment, the chest drainage device further includes a sealing unit that can block the pump suction passage when the collection container is separated from the main unit.

[0015] In one embodiment, the sealing unit includes a first sealing member and a first elastic member sleeved on the first sealing member. The first sealing member is slidably engaged with the pump extraction channel. The first elastic member is used to push the first sealing member to slide under its own elasticity to block the pump extraction channel.

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

[0017] In one embodiment, the host is provided with a detection mechanism, and the connector is provided with a pressure detection channel connecting the detection mechanism and the liquid accumulation chamber. The detection mechanism is used to detect the pressure in the liquid accumulation chamber.

[0018] The thoracic drainage device also includes a sealing component that can block the pressure detection channel when the collection container is separated from the main unit.

[0019] The aforementioned chest drainage device has a pump suction channel connected at one end to the effusion cavity and at the other end to the first tubing. The pump suction channel is then connected to a negative pressure source via the first tubing. When the main unit is powered, the negative pressure source draws air, causing the gas in the effusion cavity to be expelled sequentially through the pump suction channel and the first tubing, creating negative pressure within the effusion cavity. This allows residual fluid and gas in the patient's chest cavity to flow into the effusion cavity through the drainage tube. A one-way valve on the first tubing restricts the gas flow, ensuring it only flows from the pump suction channel to the negative pressure source. When the main unit is powered off, the negative pressure source loses power, and the one-way valve seals the pump suction channel, preventing communication with the outside. This creates a sealed container for the chest drainage device, allowing it to continue draining via gravity. Residual fluid and gas in the patient's chest cavity can still flow into the effusion cavity through the drainage tube. The chest drainage device provided in this application can continue to perform chest drainage even if the main unit suddenly loses power during use, without causing treatment to be interrupted. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the connection between the collection container and the host provided in an embodiment of this application.

[0021] Figure 2 This is a schematic diagram of the connection between the collection container and the connector provided in an embodiment of this application.

[0022] Figure 3 This is a schematic diagram of the structure of a host computer with a check valve and a solenoid valve installed in an embodiment of this application.

[0023] Figure 4 This is a schematic diagram of the connector provided in Embodiment 1 of this application.

[0024] Figure 5 This is an exploded view of the connector provided in Embodiment 1 of this application.

[0025] Figure 6 This is a cross-sectional view of the connector provided in Embodiment 1 of this application when it is connected to the host.

[0026] Figure 7 This is a cross-sectional view of the sealed unit used to block the pump's air extraction channel, as provided in Embodiment 1 of this application.

[0027] Figure 8 This is a schematic diagram of the connector provided in Embodiment 2 of this application.

[0028] Figure 9 This is an exploded view of the connector provided in Embodiment 2 of this application.

[0029] Figure 10 This is a cross-sectional view of the connector provided in Embodiment 2 of this application when it is connected to the host.

[0030] Figure 11 This is a cross-sectional view of the sealed unit used to block the pump's air extraction channel, as provided in Embodiment 2 of this application.

[0031] Figure 12 A cross-sectional view of the collection container provided in an embodiment of this application.

[0032] In the picture:

[0033] 100. Main unit; 110. Check valve; 120. Solenoid valve;

[0034] 200. Collection container;

[0035] 300. Drainage tube;

[0036] 400. Chassis; 410. Fluid accumulation chamber;

[0037] 500. Connectors;

[0038] 510. Housing; 511. Vent hole; 512. First conductive interface; 513. Second conductive interface; 514. Mounting plate; 515. Mounting hole; 520. First filter element; 530. Pressure relief component; 531. Exhaust port; 540. Pump suction channel; 550. Pressure detection channel; 560. Second filter element;

[0039] 570, Sealing unit; 571, First sealing element; 5711, First sealing part; 5712, Second sealing part; 572, First elastic element;

[0040] 580. Sealing component; 581. Second sealing element; 582. Second elastic element. Detailed Implementation

[0041] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0042] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0043] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0045] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0046] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, 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 possible implementation.

[0047] This application provides a chest drainage device, such as Figures 1 to 3 As shown, the thoracic drainage device includes a collection container 200 and a main unit 100. The collection container 200 includes a drainage tube 300 and a connected chassis 400 and connector 500. The chassis 400 is provided with a fluid accumulation chamber 410 communicating with the drainage tube 300. The connector 500 is provided with a pump suction channel 540 communicating with the fluid accumulation chamber 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 draw air to make the fluid accumulation chamber 410 negative pressure. The one-way valve 110 is provided on the first pipeline. The one-way valve 110 is used to allow the gas in the first pipeline to flow unidirectionally to the negative pressure source.

[0048] In the aforementioned 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 then connected to the negative pressure source through the first pipeline. When the main unit 100 is powered, the negative pressure source performs suction, thereby causing the gas in the effusion cavity 410 to be discharged from the effusion cavity 410 in sequence through the pump suction channel 540 and the first pipeline, thereby creating a negative pressure in the effusion cavity 410. The residual fluid and gas in the patient's chest cavity can flow into the effusion cavity 410 through the drainage tube 300. The one-way valve 110 installed on the first pipeline restricts the gas flow direction within the first pipeline, ensuring it can only flow along the pump suction channel 540 towards the negative pressure source. When the main unit 100 is powered off, the negative pressure source loses power, and the one-way valve 110 seals the pump suction channel 540, preventing it from connecting to the outside. In other words, the one-way valve 110 creates a sealed container for the chest drainage device. At this time, the chest drainage device can continue drainage via gravity, and residual fluid and gas in the patient's pleural cavity can still flow into the effusion cavity 410 through the drainage tube 300. The chest drainage device provided in this application can continue chest drainage even if the main unit 100 is suddenly powered off during use, without causing treatment interruption.

[0049] In some embodiments, such as Figures 1 to 3As shown, the host 100 is equipped with a detection mechanism, and the connector 500 is equipped with a pressure detection channel 550 that connects the detection mechanism and the liquid accumulation chamber 410. The detection mechanism is used to detect the pressure inside the liquid accumulation chamber 410. By installing the detection mechanism on the host 100 and connecting the detection mechanism to the liquid accumulation chamber 410 through the pressure detection channel 550, the detection mechanism can detect the pressure inside the liquid accumulation chamber 410.

[0050] In one specific embodiment, the detection mechanism includes a gas pressure sensor for detecting the gas pressure transmitted through the pressure detection channel 550.

[0051] In some embodiments, such as Figures 1 to 3 As shown, the main unit 100 also includes a solenoid valve 120 and a three-way pipe. The first port of the three-way pipe is connected to the pressure detection channel 550, the second port of the three-way pipe is connected to the detection mechanism, and the third port 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 it is in the open state, the solenoid valve 120 can open to connect the outside and the three-way pipe. When it is in the closed state, the solenoid valve 120 can close to seal the gas in the chest drainage device. With the solenoid valve 120 in the open state, the three-way pipe is connected to the outside, that is, the effusion chamber 410 and the pressure detection channel 550 are connected to the outside. The gas in the effusion chamber 410 and the pressure detection channel 550 can flow to the outside through the third port of the three-way valve and the solenoid valve 120 in sequence to achieve pressure relief. When the solenoid valve 120 is closed, that is, the effusion chamber 410, the pressure detection channel 550 and the three-way pipe are connected and the whole is in a sealed state, the gas in the effusion chamber 410, the pressure detection channel 550 and the three-way pipe, that is, the gas in the chest drainage device, cannot be discharged to the outside, that is, the whole chest drainage device is sealed. At this time, the chest drainage device can perform chest drainage by gravity drainage.

[0052] In one specific embodiment, the host 100 further includes an electrically connected controller and a solenoid valve 120. After the sealing test is completed upon power-on, the controller controls the solenoid valve 120 to open and release pressure. After the pressure is released, the controller controls the solenoid valve 120 to close.

[0053] In summary, when the main unit 100 is powered off, the chest drainage device is kept in a sealed state by setting the one-way valve 110 and the solenoid valve 120. At this time, the chest drainage device can perform chest drainage by gravity drainage.

[0054] When the main unit 100 is powered on, the collection container 200 is under negative pressure because the negative pressure source is constantly suctioning, making it difficult for the internal pressure of the collection container 200 to become excessive. However, when the main unit 100 is powered off, although the chest drainage device can drain the air by gravity, the gas inside the collection container 200 is not easily expelled, leading to excessive pressure inside the collection container 200, which in turn causes the collection container 200 to explode.

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

[0056] In some embodiments, such as Figures 4 to 7 As shown, the housing 510 is provided with a vent 511, and the pressure relief component 530 is a dry-seal valve provided inside the housing 510. The dry-seal valve includes an air inlet and an air outlet 531, and a diaphragm is provided inside the dry-seal valve. When the pressure inside the collection container 200 is not greater than a preset value, the diaphragm separates the air inlet and the air outlet 531. When the pressure inside the collection container 200 is greater than the preset value, the diaphragm can be displaced under the action of the pressure difference so that the air inlet and the air outlet 531 are connected. A dry-seal valve is installed inside the housing 510. When the pressure inside the housing 510 is not greater than the preset pressure, the diaphragm inside the dry-seal valve separates the air inlet and the air outlet 531. The gas inside the housing 510 cannot flow through the air outlet 531 to the vent 511 to be discharged, thereby preventing the pressure inside the housing 510 from leaking out. When the pressure inside the housing 510 is greater than the preset pressure, the diaphragm of the dry-seal valve can be displaced under the action of the pressure difference, and the air inlet and the air outlet 531 are connected. That is, the air inlet, the air outlet 531, and the vent 511 are connected. The gas inside the housing 510 is discharged to the outside of the housing 510 in sequence through the air inlet, the air outlet 531, and the vent 511, thereby relieving the pressure in the housing 510 and reducing the pressure inside the housing 510, which in turn reduces the pressure inside the collection container 200.

[0057] In one specific embodiment, such as Figures 4 to 7As shown, a mounting plate 514 is provided inside the housing 510. The mounting plate 514 divides the inner cavity of the housing 510 into a first receiving cavity and a second receiving cavity arranged along the direction of gravity. A mounting hole 515 is provided on the mounting plate 514 to connect the first receiving cavity and the second receiving cavity. A vent hole 511 is connected to the first receiving cavity. A dry-seal valve is located in the first receiving cavity and connected to the wall of the mounting hole 515. A pump suction channel 540 is located in the second receiving cavity. When the pressure in the second receiving cavity is greater than a preset value, the air pressure in the second receiving cavity enters the interior of the dry-seal valve through the air inlet of the dry-seal valve, causing the diaphragm to move. This connects the air inlet and exhaust port 531 of the dry-seal valve, allowing the gas in the second receiving cavity to flow into the first receiving cavity sequentially through the air inlet and exhaust port 531. The gas in the first receiving cavity is then discharged to the outside through the vent hole 511 to relieve pressure.

[0058] In some embodiments, such as Figures 8 to 12 As shown, the housing 510 is provided with a vent 511, and the pressure relief component 530 is a pressure relief component movably connected to the vent 511. When the pressure inside the collection container 200 is not greater than a preset value, the pressure relief component covers and seals the vent 511. When the pressure inside the collection container 200 is greater than the preset value, the pressure relief component can be blown up under the action of the pressure difference to detach from the vent 511. When the internal pressure of the housing 510 is greater than the preset value, the pressure relief component moves under the action of the pressure difference, thereby causing the gas inside the connector 500 to be discharged through the vent 511. In the second state, when the internal pressure of the housing 510 is less than or equal to the preset value, the pressure relief component blocks the vent 511 to prevent the gas inside the housing 510 of the connector 500 from being discharged.

[0059] In one specific embodiment, such as Figures 8 to 11 As shown, the pressure relief component is movably connected to the vent 511. When the pressure inside the housing 510 is less than the preset value, the pressure relief component covers and seals the vent 511. When the pressure inside the housing 510 is greater than the preset value, the pressure relief component is blown up by the pressure difference to detach from the vent 511. The preset value is greater than atmospheric pressure.

[0060] Please return to the reference. Figures 4 to 7 The chest drainage device also includes a sealing unit 570, which can block the pump suction channel 540 when the collection container 200 is separated from the main unit 100. By setting the sealing unit 570, when the collection container 200 is separated from the main unit 100, the sealing unit 570 blocks the pump suction channel 540, thereby making the collection container 200 a sealed whole, that is, the collection container 200 can be used alone to achieve gravity drainage.

[0061] In one specific embodiment, such as 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 engaged 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 elasticity, thereby blocking the pump suction channel 540. By providing the first sealing member 571, the first sealing member 571 can slide at least partially within the pump suction channel 540. When it slides to the first position, it can block the pump suction channel 540. When it slides to the second position, it can expose the pump suction channel 540. By providing the first elastic member 572 on the first sealing member 571, the first elastic member 572 can elastically reset, thereby pushing the first sealing member 571 to switch from the second position to the first position.

[0062] In one specific embodiment, such as Figures 4 to 7 As shown, the first sealing member 571 includes a first sealing part 5711 and a second sealing part 5712 connected to each other. The first sealing part 5711 is slidably engaged with the pump air extraction channel 540. When the second sealing part 5712 is in the first position, it can abut against the end of the pump air extraction channel 540 to block the pump air extraction channel 540. When the second sealing part 5712 is in the second position, the pump air extraction channel 540 can be exposed.

[0063] In one specific embodiment, such as Figures 4 to 7 As shown, the first elastic element 572 is a spring.

[0064] In some embodiments, such as Figures 4 to 7 As shown, the main unit 100 is equipped with a detection mechanism, and the connector 500 is equipped with a pressure detection channel 550 connecting the detection mechanism and the effusion chamber 410. The detection mechanism is used to detect the pressure inside the effusion chamber 410. The thoracic drainage device also includes a sealing component 580, which can block the pressure detection channel 550 when the collection container 200 is separated from the main unit 100. By setting the sealing component 580, when the collection container 200 is separated from the main unit 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 main unit 100, the collection container 200 forms a sealed structure as a whole, and the collection container 200 can achieve gravity drainage on its own.

[0065] In one specific embodiment, such as Figures 4 to 7 As shown, the connector 500 also includes a second filter element 560, which is disposed within the pressure detection channel 550. The second filter element 560 filters the gas passing through the pressure detection channel 550.

[0066] In some embodiments, such as Figures 4 to 7As shown, the sealing assembly 580 and the sealing unit 570 have the same structure, and will not be described in detail here. In some embodiments, the sealing assembly 580 and the sealing unit 570 have different structures. For example, the sealing assembly 580 includes a piston, as long as the sealing assembly 580 can block the pressure detection channel 550 when the host 100 and the collection container 200 are separated.

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

[0068] In some embodiments, such as Figures 8 to 12 As shown, the sealed unit 570 includes a first filter element 520 disposed within the pump suction channel 540. When the collection container 200 is separated from the main unit 100, the liquid in the accumulating chamber 410 flows into the pump suction channel 540, causing the first filter element 520 to expand and block the pump suction channel 540. By providing the first filter element 520, when the collection container 200 is separated from the main unit 100, the liquid in the accumulating chamber 410 flows into the pump suction channel 540, and the first filter element 520 absorbs the liquid and expands, thereby blocking the pump suction channel 540. At this time, the collection container 200 is a sealed whole, so the collection container 200 can achieve thoracic drainage by gravity drainage.

[0069] In summary, when the main unit 100 and the collection container 200 are connected, if the main unit 100 is powered off, the one-way valve 110 and the solenoid valve 120 provided on the main unit 100 can keep the main unit 100 and the collection container 200 sealed, thereby enabling the thoracic drainage device to achieve gravity drainage.

[0070] When the host 100 and the collection container 200 are separated, the pump extraction 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 connector 500 to depressurize the collection container 200 and prevent excessive pressure inside the collection container 200.

[0072] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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 embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A chest drainage device, characterized in that, The chest drainage device includes: A collection container includes a drainage tube and a connected housing and connectors. The housing is provided with a liquid collection chamber communicating with the drainage tube, and the connectors are provided with a pump suction channel communicating with the liquid collection chamber. The main unit includes a negative pressure source and a one-way valve. The negative pressure source is connected to the pump's air extraction channel through a first pipeline. The negative pressure source can draw in air to make the liquid accumulation chamber negative pressure. The one-way valve is installed on the first pipeline and is used to allow the gas in the first pipeline to flow unidirectionally to the negative pressure source. The host is equipped with a detection mechanism, and the connector is equipped with a pressure detection channel that connects the detection mechanism and the liquid accumulation chamber. The detection mechanism is used to detect the pressure inside the liquid accumulation chamber. The main unit also includes a solenoid valve and a three-way pipe. The first port of the three-way pipe is connected to the pressure detection channel, the second port of the three-way pipe is connected to the detection mechanism, and the third port of the three-way pipe is connected to the solenoid valve. The solenoid valve has an open state and a closed state. When it is in the open state, the solenoid valve can open to connect the outside world and the three-way pipe. When it is in the closed state, the solenoid valve can close to seal the gas in the chest drainage device.

2. The thoracic drainage device according to claim 1, characterized in that, The connector includes a housing and a pressure relief component mounted on the housing. The pressure relief component is used to release pressure when the pressure inside the housing exceeds a preset value.

3. The thoracic drainage device according to claim 2, characterized in that, The housing is provided with a vent hole, and the pressure relief component is a dry-seal valve disposed inside the housing. The dry-seal valve includes an air inlet and an air outlet, and a diaphragm is disposed inside the dry-seal valve. When the pressure inside the collection container is not greater than the preset value, the diaphragm separates the air inlet and the air outlet. When the pressure inside the collection container is greater than the preset value, the diaphragm can shift under the action of the pressure difference to make the air inlet and the air outlet connected.

4. The thoracic drainage device according to claim 2, characterized in that, The housing is provided with a vent hole, and the pressure relief component is a pressure relief component that is movably connected to the vent hole. When the pressure inside the collection container is not greater than the preset value, the pressure release element covers and seals the vent hole. When the pressure inside the collection container is greater than the preset value, the pressure release element can be blown up under the action of the pressure difference to detach from the vent hole.

5. The thoracic drainage device according to claim 1, characterized in that, The chest drainage device also includes a sealing unit that can block the pump's air extraction channel when the collection container is separated from the main unit.

6. The thoracic drainage device according to claim 5, 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 is slidably engaged with the pump extraction channel. The first elastic member is used to push the first sealing member to slide under its own elasticity to block the pump extraction channel.

7. The thoracic drainage device according to claim 6, characterized in that, The first sealing element includes a first sealing part and a second sealing part connected to each other. The first sealing part is slidably fitted with the pump air extraction channel. When the second sealing part is in the first position, it can abut against the end of the pump air extraction channel to block the pump air extraction channel. When the second sealing part is in the second position, it can expose the pump air extraction channel.

8. The thoracic drainage device according to claim 5, characterized in that, The sealed unit includes a first filter element disposed in the pump exhaust channel. When the collection container is separated from the main unit, the liquid in the liquid accumulation chamber flows into the pump exhaust channel to cause the first filter element to expand and block the pump exhaust channel.

9. The thoracic drainage device according to claim 1, characterized in that, The host is equipped with a detection mechanism, and the connector is equipped with a pressure detection channel that connects the detection mechanism and the liquid accumulation chamber. The detection mechanism is used to detect the pressure inside the liquid accumulation chamber. The thoracic drainage device also includes a sealing component that can block the pressure detection channel when the collection container is separated from the main unit.

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