Collecting container and chest drainage device

Abstract

The invention relates to a collection container and a chest drainage device. The collection container comprises a drainage tube, a case and a connecting piece, and the case is provided with a hydrops cavity connected with one end of the drainage tube; the connecting piece is installed on the machine case and comprises a shell, the shell is provided with a pump air exhaust channel, and the pump air exhaust channel is used for being communicated with a suction opening and a liquid accumulation cavity of the main machine; and the plugging unit can plug the pump exhaust channel in the second use state. The chest drainage device comprises a main machine and the collecting container, the main machine is detachably connected with the collecting container, when the chest drainage device is in a first use state, the pump air exhaust channel is communicated with a negative pressure source of the main machine, and when the chest drainage device is in a second use state, the plugging unit plugs the pump air exhaust channel.

Description

Technical Field

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

[0002] The chest drainage device includes a gravity chest drainage device and a negative pressure chest drainage device. The gravity chest drainage device is to place one end of the drainage tube into the chest cavity and the other end into a water seal bottle at a lower position. The liquid discharged from the chest cavity enters the water seal bottle for storage through the drainage tube, and the gas in the water seal bottle is discharged. The negative pressure chest drainage device includes a connected host and a collection container. The collection container is connected to the patient through a drainage tube. The negative pressure source on the host is connected to the collection container. The negative pressure source can be sucked to generate negative pressure in the collection container, and then the residual fluid and residual gas in the chest cavity are sucked through the drainage tube, so that the pleural cavity quickly forms negative pressure, which speeds up the patient's recovery. In the existing negative pressure chest drainage device, when the collection container is separated from the host, the collection container cannot be used alone, and the scope of use of the existing negative pressure chest drainage device is limited. Summary of the invention

[0003] Based on this, it is necessary to provide a collection container and a chest drainage device to address the problem of using the collection container alone.

[0004] A collection container has a first use state in which it can be connected to a host and a second use state in which it can be separated from the host, the collection container comprising:

[0005] Drainage tube;

[0006] a chassis having a fluid accumulation chamber connected to one end of the drainage tube;

[0007] A connecting piece, mounted on the chassis, the connecting piece includes a shell, the shell is provided with a pump suction channel, the pump suction channel is used to connect the suction port of the host and the liquid accumulation chamber;

[0008] The blocking unit can block the pump air suction channel in the second use state.

[0009] In one embodiment, the blocking unit includes a first blocking piece and a first restoring piece sleeved on the first blocking piece, the first blocking piece slidingly cooperates with the pump suction channel, and the first restoring piece is used to push the first blocking piece to slide under its own elastic action to block the pump suction channel.

[0010] In one embodiment, the blocking unit includes a first filter element disposed in a pump suction channel, and the liquid in the liquid accumulation chamber can flow into the pump suction channel to expand the first filter element to block the pump suction channel.

[0011] In one of the embodiments, the collection container further includes a pressure relief structure, and the pressure relief structure is used to relieve pressure when the pressure inside the shell exceeds a preset value.

[0012] In one embodiment, the pressure relief structure includes:

[0013] A release hole, disposed on the housing and connected to the pump air extraction channel;

[0014] The release diaphragm has a first state in which the internal pressure is greater than the preset value and a second state in which the internal pressure is less than the preset value. When in the first state, the release diaphragm can move relative to the release hole to connect the release hole with the outside world. When in the second state, the release diaphragm blocks the release hole.

[0015] In one embodiment, the connecting member further includes a second filter element, a pressure detection channel is provided in the shell, the pressure detection channel is used to connect the detection mechanism of the host and the fluid accumulation chamber, and the second filter element is provided in the pressure detection channel.

[0016] In one of the embodiments, a blocking structure is further included, and the blocking structure can block the pressure detection channel in the second usage state.

[0017] The present application also provides a chest drainage device, comprising a main unit and the above-mentioned collection container, wherein the main unit and the collection container are detachably connected, and when in the first usage state, the pump suction channel is connected to the negative pressure source of the main unit, and when in the second usage state, the blocking unit blocks the pump suction channel.

[0018] In one embodiment, the host is provided with a pushing member, the blocking unit comprises a first blocking member and a first resetting member sleeved on the first blocking member, and the first blocking member is slidably matched with the pump suction channel;

[0019] In the first use state, the pushing member can push the first blocking member to slide in the pump suction channel to connect the pump suction channel and the negative pressure source;

[0020] In the second use state, the first restoring member is used to push the first blocking member to slide under the action of its own elasticity to block the pump suction channel.

[0021] In one of the embodiments, in the second usage state, the liquid in the liquid accumulation chamber of the collection container flows into the pump suction channel to expand the first filter element to block the pump suction channel.

[0022] The above-mentioned collection container has a connector installed on the chassis, and a pump suction channel is provided in the shell of the connector. When the collection container is in the first use state, the pump suction channel can be connected to the suction port of the host, and the host sucks the effusion cavity through the pump suction channel, so that a negative pressure is formed in the effusion cavity. When the collection container is in the second use state, because the collection container is provided with a blocking unit, the blocking unit blocks the pump suction channel, that is, blocks the connector and the chassis, so that a closed space is formed inside the collection container. When the collection container is actually used in the second use state, the collection container is set at a position lower than the patient's chest cavity, and one end of the drainage tube can be extended into the chest cavity, and the other end of the drainage tube is connected to the effusion cavity of the chassis. Because the host and the collection container are separated, the blocking unit blocks the pump suction channel, so that when the collection container forms a closed structure, the residual liquid and residual gas in the chest cavity can flow into the collection container by gravity drainage. The collection container provided in the present application can be used alone to achieve gravity drainage after the host and the collection container are separated, thereby expanding the use scope of the collection container. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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.

[0024] Figure 2 A schematic diagram of the structure of the collection container and the connecting piece provided in an embodiment of the present application.

[0025] Figure 3 A cross-sectional view of a collection container provided in an embodiment of the present application.

[0026] Figure 4 This is a schematic diagram of the structure of the connector provided in Example 1 of the present application.

[0027] Figure 5 This is an exploded view of the connector connection provided in Example 1 of the present application.

[0028] 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.

[0029] Figure 7 This is a cross-sectional view of the first blocking member provided in Example 1 of the present application when blocking the pump suction channel.

[0030] Figure 8 This is a schematic diagram of the structure of the connector provided in Example 2 of the present application.

[0031] Fig. 9 This is an exploded view of the connector connection provided in Example 2 of the present application.

[0032] 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.

[0033] Fig.11 This is a cross-sectional view of the second sealing member provided in the second embodiment of the present application when sealing the pump suction channel.

[0034] In the figure:

[0035] 100. Host;

[0036] 200. Collection container;

[0037] 300, drainage tube;

[0038] 400, chassis; 410, fluid accumulation chamber;

[0039] 500, connector;

[0040] 510, housing; 511, pressure relief hole; 512, first chamber; 513, through hole; 514, first interface; 515, second interface; 520, first filter element; 530, pressure relief structure; 531, release hole; 532, release diaphragm; 533, exhaust hole; 540, pump suction channel; 550, pressure detection channel; 560, second filter element;

[0041] 570, blocking unit; 571, first blocking member; 5711, first sliding portion; 5712, first blocking portion; 572, first resetting member;

[0042] 580, blocking structure; 581, second blocking member; 5811, second sliding portion; 5812, second blocking portion; 582, second resetting member. DETAILED DESCRIPTION

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] The present application provides a collection container 200, which has a first use state in which it can be connected to a host 100, and a second use state in which it can be separated from the host 100. Figures 1 to 11 As shown, the collection container 200 includes a drainage tube 300, a chassis 400 and a connector 500, the chassis 400 has a fluid collection chamber 410 connected to one end of the drainage tube 300; the connector 500 is installed on the chassis 400, the connector 500 includes a shell 510, the shell 510 is provided with a pump suction channel 540, the pump suction channel 540 is used to connect the suction port of the host 100 and the fluid collection chamber 410; the blocking unit 570 can block the pump suction channel 540 in the second use state.

[0050] The above-mentioned collection container 200 is provided with a connector 500 on the chassis 400, and a pump suction channel 540 is provided in the housing 510 of the connector 500. When the collection container 200 is in the first use state, the pump suction channel 540 can be connected to the suction port of the host 100, and the host 100 sucks the effusion cavity 410 through the pump suction channel 540, thereby forming a negative pressure in the effusion cavity 410. When the collection container 200 is in the second use state, that is, the collection container 200 and the host 100 are separated, because the collection container 200 is provided with a blocking unit 570, the blocking unit 570 blocks the pump suction channel 540, that is, blocks the air outlet of the connector 500 and the chassis 400, so that a closed space is formed inside the collection container 200. When the collection container 200 is actually used in the second use state, the collection container 200 is set at a position lower than the patient's chest cavity, and one end of the drainage tube 300 can be extended into the chest cavity, and the other end of the drainage tube 300 is connected to the effusion cavity 410 of the chassis 400. Because the host 100 and the collection container 200 are separated, the blocking unit 570 blocks the pump suction channel 540, so that the collection container 200 forms a closed structure, and the residual liquid and residual gas in the chest cavity can flow into the collection container 200 by gravity drainage. The collection container 200 provided in the present application can be used alone to achieve gravity drainage after the host 100 and the collection container 200 are separated, thereby increasing the scope of use of the collection container 200.

[0051] In some embodiments, Figures 4 to 7As shown, the blocking unit 570 includes a first blocking member 571 and a first reset member 572 sleeved on the first blocking member 571. The first blocking member 571 is slidably matched with the pump suction channel 540. The first reset member 572 is used to push the first blocking member 571 to slide under its own elastic action to block the pump suction channel 540. By providing the first blocking member 571, the first blocking 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 reset member 572 on the first blocking member 571, the first reset member 572 can be elastically reset to push the first blocking member 571 to switch from the second position to the first position.

[0052] In a specific embodiment, if Figures 4 to 7 As shown, the first blocking member 571 includes a first sliding portion 5711 and a first blocking portion 5712 that are connected to each other. The first sliding portion 5711 slides with the pump suction channel 540. When the first blocking 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 first blocking portion 5712 is in the second position, the pump suction channel 540 can be exposed.

[0053] In a specific embodiment, if Figures 4 to 7 As shown, the first return member 572 is a spring.

[0054] In some embodiments, Figures 4 to 7 As shown, the connector 500 further includes a second filter element 560, a pressure detection channel 550 is provided in the housing 510, and the pressure detection channel 550 is used to connect the detection mechanism of the host 100 and the liquid accumulation chamber 410, and the second filter element 560 is provided in the pressure detection channel 550. By providing the pressure detection channel 550 to connect the detection mechanism of the host 100 and the liquid accumulation chamber 410, the gas in the liquid accumulation chamber 410 can flow into the detection mechanism through the pressure detection channel 550, and the detection mechanism calculates the gas pressure in the liquid accumulation chamber 410 by detecting the inflowing gas.

[0055] In a specific embodiment, the detection mechanism on the host 100 includes a gas pressure sensor. When the gas in the liquid accumulation chamber 410 flows into the detection mechanism in the host 100 through the pressure detection channel 550, the gas pressure sensor of the detection mechanism can measure the pressure of the gas, and thus obtain the gas pressure in the liquid accumulation chamber 410.

[0056] In some embodiments, Figures 4 to 7As shown, the collection container 200 further includes a blocking structure 580, which can block the pressure detection channel 550 in the second use state. By setting the blocking structure 580, when the collection container 200 is in the second use state, that is, when the collection container 200 and the host 100 are separated, the blocking structure 580 blocks the pressure detection channel 550, thereby sealing the collection container 200, so that the collection container 200 can achieve gravity drainage.

[0057] like Figures 4 to 7 As shown, the blocking structure 580 includes a second blocking member 581 and a second reset member 582 sleeved on the second blocking member 581. The second blocking member 581 slidably cooperates with the pressure detection channel 550. The second reset member 582 is used to push the second blocking member 581 to slide under its own elastic action to block the pressure detection channel 550.

[0058] In a specific embodiment, if Figures 4 to 7 As shown, the second blocking member 581 includes a second sliding portion 5811 and a second blocking portion 5812 that are connected to each other. The second sliding portion 5811 slides with the pressure detection channel 550. When the second blocking portion 5812 is in the third position, it can abut against the end of the pressure detection channel 550 to block the pressure detection channel 550. When the second blocking portion 5812 is in the fourth position, the pressure detection channel 550 can be exposed.

[0059] In a specific embodiment, if Figures 4 to 7 As shown, the second return member 582 is a spring.

[0060] In a specific embodiment, if Figures 4 to 7 As shown, the housing 510 of the connector 500 is provided with a first interface 514, which connects the pump suction channel 540 and the liquid accumulation chamber 410. The housing 510 is provided with a second interface 515, which connects the pressure detection channel 550 and the liquid accumulation chamber 410.

[0061] When the collection container 200 is used alone, due to the lack of negative pressure suction, the pressure inside the collection container 200 may be too high, causing unpredictable harm to the patient. For this reason, the collection container also includes a pressure relief structure 530, which relieves pressure when the pressure inside the shell 510 exceeds a preset value. By arranging the pressure relief structure 530 on the shell 510, the pressure can be relieved when the pressure inside the shell 510 of the connecting member 500 exceeds a preset value, thereby reducing the pressure inside the shell 510 and preventing the connecting member 500 from causing harm to the patient due to excessive pressure.

[0062] In a specific embodiment, if Figures 4 to 7As shown, the pressure relief structure 530 is a dry seal valve, and the pressure relief structure 530 includes a release hole 531 (not shown) and a release diaphragm 532 (not shown). The release hole 531 is provided on the housing 510 and communicates with the pump suction channel 540. The connector 500 has a first state in which the internal pressure is greater than a preset value and a second state in which the internal pressure is less than the preset value. When in the first state, the release diaphragm 532 can move relative to the release hole 531 to make the release hole 531 communicate with the outside. When in the second state, the release diaphragm 532 blocks the release hole 531. When in the first state, the internal pressure of the housing 510 is greater than the preset value, and the release diaphragm 532 moves under the action of the pressure difference, so that the gas in the connector 500 is discharged through the release hole 531. When in the second state, the internal pressure is less than or equal to the preset value, and the release diaphragm 532 blocks the release hole 531 to prevent the gas in the housing 510 of the connector 500 from being discharged.

[0063] In a specific embodiment, if Figures 4 to 7 As shown, the pressure relief structure 530 includes a pressure relief hole 511 arranged on the top cover of the shell 510, and a dry seal valve arranged in the shell 510, a release diaphragm (not shown) is arranged in the cavity of the dry seal valve, and a release hole (not shown) connected to the cavity is arranged on the lower bottom surface of the dry seal valve, and an exhaust hole 533 connected to the cavity is arranged on the upper top surface of the dry seal valve. When in a first state, the release diaphragm can move in the cavity, so that the release hole and the exhaust hole 533 are connected, and the gas is discharged to the outside through the release hole, the exhaust hole 533, and the pressure relief hole 511 in turn. When in a second state, the release diaphragm 532 is blocked in the release hole, thereby isolating the release hole and the exhaust hole (not shown).

[0064] More specifically, if Figures 4 to 7 As shown, the shell 510 includes a first chamber and a second chamber arranged along the direction of gravity, the first chamber 512 and the second chamber are connected through a through hole 513, the pressure relief structure 530 is arranged in the first chamber and connected to the hole wall of the through hole 513, and the pump suction channel 540 is arranged in the second chamber.

[0065] In some embodiments, Figure 3 ,as well as Figures 8 to 11 As shown, the blocking unit 570 includes a first filter element 520 disposed in the pump suction channel 540, and the liquid in the effusion cavity 410 can flow 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 in the second use state, that is, 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 can use gravity drainage to achieve chest drainage.

[0066] In some embodiments, Figures 8 to 11 As shown, the pressure relief structure 530 includes a release hole 531 and a release diaphragm 532. The release hole 531 is provided on the housing 510 and communicates with the pump suction channel 540. The connector 500 has a first state in which the internal pressure is greater than a preset value and a second state in which the internal pressure is less than the preset value. When in the first state, the release diaphragm 532 can move relative to the release hole 531 to connect the release hole 531 with the outside. When in the second state, the release diaphragm 532 blocks the release hole 531. When in the first state, the internal pressure is greater than the preset pressure value, and the release diaphragm 532 moves under the action of the pressure difference, so that the gas in the connector 500 is discharged through the release hole 531. When in the second state, the internal pressure is less than or equal to the preset pressure value, and the release diaphragm 532 blocks the release hole 531 to prevent the gas in the housing 510 of the connector 500 from being discharged.

[0067] In a specific embodiment, if Figures 8 to 11 As shown, the release diaphragm 532 is movably connected to the release hole 531. When the pressure in the shell 510 is less than a preset value, the release diaphragm 532 covers and seals the release hole 531. When the pressure in the shell 510 is greater than the preset value, under the action of the pressure difference, the release diaphragm 532 is blown up to separate from the release hole 531. The preset value is greater than the atmospheric pressure.

[0068] The present application also provides a chest drainage device, including a main unit 100 and the above-mentioned collection container 200, the main unit 100 and the collection container 200 are detachably connected, when in a first use state, the pump suction channel 540 is connected to the negative pressure source of the main unit 100, and when in a second use state, the blocking unit 570 blocks the pump suction channel 540. The chest drainage device provided by the present application, the collection container 200 and the main unit 100 are detachably connected, when the collection container 200 and the main unit 100 are connected, negative pressure suction drainage can be achieved, when the collection container 200 and the main unit 100 are separated, gravity drainage can be achieved, the chest drainage device provided by the present application has a variety of usage modes, which is convenient for medical staff to choose.

[0069] In some embodiments, a pushing member is provided on the host 100, and the blocking unit 570 includes a first blocking member 571 and a first resetting member 572 sleeved on the first blocking member 571, and the first blocking member 571 is slidably matched with the pump suction channel 540; in a first usage state, the pushing member can push the first blocking member 571 to slide in the pump suction channel 540 to connect the pump suction channel 540 and the negative pressure source; in a second usage state, the first resetting member 572 is used to push the first blocking member 571 to slide under its own elastic action to block the pump suction channel 540. A pushing member is provided on the main unit 100. When the collection container 200 is in a first usage state, that is, the main unit 100 is connected to the collection container 200, the pushing member pushes the first blocking member 571 to slide, thereby exposing the pump suction channel 540. When the collection container 200 is in a second usage state, that is, the main unit 100 is separated from the collection container 200, the first reset member 572 is reset to push the first blocking member 571 to slide in the pump suction channel 540 and block the pump suction channel 540.

[0070] In some embodiments, in the second use state, the liquid in the effusion cavity 410 of the collection container 200 flows into the pump suction channel 540 to expand the first filter element 520 to block the pump suction channel 540. When the collection container 200 needs to be used alone, the collection container 200 and the host 100 can be disassembled first, and the liquid in the effusion cavity 410 flows into the pump suction channel 540 to expand the first filter element 520, thereby blocking the pump suction channel 540. In this embodiment, the blocking unit 570 of the collection container 200 blocks the pump suction channel 540, and the blocking structure 580 blocks the pressure detection channel 550, so that the collection container 200 is sealed. At this time, only the end of the drainage tube 300 can be connected to the outside world. The drainage tube 300 is inserted into the patient's chest cavity to achieve gravity drainage.

[0071] 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.

[0072] 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 collection container having a first use state in which it can be connected to a host and a second use state in which it can be separated from the host, characterized in that: The collection container comprises: Drainage tube; a chassis having a fluid accumulation chamber connected to one end of the drainage tube; A connecting piece, mounted on the chassis, the connecting piece comprising a shell, the shell being provided with a pump suction channel, the pump suction channel being used to connect the suction port of the host and the liquid accumulation chamber; The blocking unit can block the pump air suction channel in the second use state.

2. The collection container according to claim 1, characterized in that: The blocking unit includes a first blocking piece and a first restoring piece sleeved on the first blocking piece, the first blocking piece slidably cooperates with the pump suction channel, and the first restoring piece is used to push the first blocking piece to slide under its own elastic action to block the pump suction channel.

3. The collection container according to claim 1, characterized in that: The blocking unit includes a first filter element disposed in the pump suction channel, and the liquid in the liquid accumulation chamber can flow into the pump suction channel to cause the first filter element to expand to block the pump suction channel.

4. The collection container according to claim 1, characterized in that: The collection container further comprises a pressure relief structure, and the pressure relief structure is used for releasing pressure when the pressure inside the shell exceeds a preset value.

5. The collection container according to claim 4, characterized in that: The pressure relief structure comprises: A release hole, disposed on the housing and connected to the pump air extraction channel; The release diaphragm has a first state in which the internal pressure is greater than the preset value and a second state in which the internal pressure is less than the preset value. When in the first state, the release diaphragm can move relative to the release hole to connect the release hole with the outside world. When in the second state, the release diaphragm blocks the release hole.

6. The collection container according to claim 1, characterized in that: The connecting member further comprises a second filter element. A pressure detection channel is arranged in the shell. The pressure detection channel is used to connect the detection mechanism of the host and the liquid accumulation chamber. The second filter element is arranged in the pressure detection channel.

7. The collection container according to claim 6, characterized in that: It also includes a blocking structure, which can block the pressure detection channel in the second use state.

8. A chest drainage device, characterized in that: It comprises a main unit and the collection container according to any one of claims 1 to 7, wherein the main unit and the collection container are detachably connected, and when in the first use state, the pump suction channel is connected to the negative pressure source of the main unit, and when in the second use state, the blocking unit blocks the pump suction channel.

9. The chest drainage device according to claim 8, characterized in that: The host is provided with a pushing member, the blocking unit comprises a first blocking member and a first resetting member sleeved on the first blocking member, and the first blocking member is slidably matched with the pump suction channel; In the first use state, the pushing member can push the first blocking member to slide in the pump suction channel to connect the pump suction channel and the negative pressure source; In the second use state, the first restoring member is used to push the first blocking member to slide under the action of its own elasticity to block the pump suction channel.

10. The chest drainage device according to claim 8, characterized in that: In the second use state, the liquid in the liquid accumulation chamber of the collection container flows into the pump suction channel to expand the first filter element to block the pump suction channel.

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