Anti-overflow protector, collection container and chest drainage device

Abstract

The application provides an anti-overflow protector, a collecting container and a chest drainage device, wherein the collecting container and the anti-overflow protector are separately arranged, the anti-overflow protector and the collecting container are two independent components, and the anti-overflow protector is detachably connected with the collecting container. The collecting container is communicated with a negative pressure suction device, a pressure detection device and the like through the anti-overflow protector. In a negative pressure suction mode, the anti-overflow protector arranged in a negative pressure suction channel prevents liquid from flowing to the negative pressure suction device, and the anti-overflow protector arranged in a pressure detection channel prevents liquid from flowing to the pressure detection device. When gravity drainage mode is needed, the collecting container can be separated from the main machine and the anti-overflow protector, the collecting container is provided with a water seal cavity, so that the drainage operation can be completed in the traditional gravity drainage mode.

Description

Technical Field

[0001] This application relates to the field of medical devices, specifically to the structure of a chest drainage device. Background Technology

[0002] A chest drainage device is a commonly used medical device, for example, for drainage of the pleural cavity and mediastinum in cases of traumatic pneumothorax, after cardiac or thoracic surgery, chest injury, pleural effusion, pleural effusion, or other related conditions.

[0003] A negative pressure aspiration chest drainage device is driven by negative pressure. For example, a negative pressure source is provided at the bedside, and a disposable chest drainage device is connected to the negative pressure source via a flexible tube. The drainage tube of the disposable chest drainage device is then connected to the patient. The negative pressure source aspiration generates negative pressure in the collection container, which can quickly aspirate residual pleural fluid and air, rapidly creating negative pressure in the pleural cavity and accelerating the patient's recovery. The aspirated fluid is stored in the collection container to prevent contamination. Typically, to prevent fluid from being aspirated into the negative pressure source and damaging it, an overflow prevention filter is integrated into the collection container. This filter allows gas to pass through, but expands upon contact with water, thus blocking the passage between the collection container and the negative pressure source and preventing fluid from entering the negative pressure source.

[0004] Another type of chest drainage device uses the traditional gravity drainage mode. One end of the drainage tube is placed in the chest cavity, and the other end is placed in a water-seal bottle at a lower position. The fluid drained from the chest cavity enters the collection container for storage through the drainage tube, and the gas drained out through the water-seal cavity.

[0005] These two types of chest drainage devices have their own structures, making it difficult to switch between them flexibly. For example, in negative pressure aspiration mode, the collection container is integrated with the overflow prevention filter, making it unsuitable for gravity drainage. Furthermore, the water seal bottle used for gravity drainage lacks an overflow prevention structure and cannot be used in negative pressure aspiration mode. Summary of the Invention

[0006] This application provides an overflow protector, a collection container, and a chest drainage device and a collection container for chest drainage, to demonstrate a structure in which the collection container and the overflow protector are separately installed and can be detached.

[0007] Based on the above objectives, one embodiment of this application provides an anti-overflow protector for a chest drainage device, comprising a protector housing, wherein the protector housing is provided with a negative pressure suction channel, a pressure detection channel, and an anti-overflow filter element, the negative pressure suction channel and the pressure detection channel being separated from each other, the negative pressure suction channel being detachably connected to the water seal chamber of a collection container; the pressure detection channel being connected to the liquid collection chamber of the collection container; and the anti-overflow filter element being provided in the negative pressure suction channel and the pressure detection channel to prevent liquid overflow.

[0008] In one embodiment, the negative pressure suction channel has a second gas flow interface and a third gas flow interface. The second gas flow interface is detachably connected to a collection container, and the third gas flow interface is connected to a negative pressure suction device to suction gas from the collection container. The pressure detection channel has a second pressure detection interface and a third pressure detection interface. The second pressure detection interface is detachably connected to the collection container, and the third pressure detection interface is connected to a pressure detection device to detect the pressure inside the collection container. The anti-overflow filter element includes a first filter element and a second filter element. The first filter element is disposed in the negative pressure suction channel to prevent liquid from flowing to the negative pressure suction device, and the second filter element is disposed in the pressure detection channel to prevent liquid from flowing to the pressure detection device.

[0009] In one embodiment, the first filter element is a cylindrical structure with its opening facing the end where the second gas flow interface is located.

[0010] In one embodiment, the opening wall of the first filter element is sealed and connected to the opening wall of the second gas flow interface.

[0011] In one embodiment, the overflow protector further includes a sealing component for sealing the third pressure detection port when the overflow protector is disconnected from the negative pressure suction device.

[0012] In one embodiment, the pressure detection channel has a mounting cavity that communicates with a third pressure detection interface. The sealing assembly includes a seal and an elastic element. The seal is movably disposed within the mounting cavity. The elastic element acts on the seal, and the elastic force of the elastic element drives the seal to seal the third pressure detection interface.

[0013] In one embodiment, the seal has a sealing portion and a connecting portion connected to the sealing portion, the sealing portion being disposed toward the third pressure detection interface, and the elastic member acting on the connecting portion to drive the sealing portion to seal the third pressure detection interface.

[0014] Based on the above objectives, this application provides another anti-overflow protector for a thoracic drainage device in one embodiment, characterized in that it includes a pressure detection channel, an anti-overflow filter element, and a sealing element. The pressure detection channel has a second pressure detection interface and a third pressure detection interface. The second pressure detection interface is used to communicate with the collection container, and the third pressure detection interface is used to detachably communicate with a pressure detection device to detect the pressure inside the collection container. The anti-overflow filter element includes a second filter element disposed within the pressure detection channel to prevent liquid from flowing to the pressure detection device. When the anti-overflow protector is disengaged from the negative pressure suction device, the sealing element seals the pressure detection channel under its own elasticity or the driving force of the driving element.

[0015] In one embodiment, the seal is disposed within the pressure detection channel.

[0016] In one embodiment, a driving member is further included, which is pulsatorically connected to the seal and drives the seal to seal the pressure detection channel.

[0017] In one embodiment, the driving member includes an elastic member, the pressure detection channel has a mounting cavity, the mounting cavity is connected to a third pressure detection interface, the sealing member is movably disposed in the mounting cavity, the elastic member acts on the sealing member, and the elastic force of the elastic member drives the sealing member to seal the third pressure detection interface.

[0018] In one embodiment, the seal has a sealing portion and a connecting portion connected to the sealing portion, the sealing portion being disposed toward the third pressure detection interface, and the elastic member acting on the connecting portion to drive the sealing portion to seal the third pressure detection interface.

[0019] In one embodiment, the seal is at least partially made of a flexible, elastic material, which seals the pressure detection channel by its own elasticity.

[0020] In one embodiment, the overflow protection device includes a protection device housing, and the negative pressure suction channel and the pressure detection channel are both located inside the protection device housing, and the negative pressure suction channel and the pressure detection channel are separated from each other.

[0021] To achieve the above objectives, one embodiment provides a chest drainage device, comprising:

[0022] A collection container having a liquid collection chamber for collecting liquid, a water seal chamber for water sealing, a liquid inlet for liquid to enter the liquid collection chamber, a first gas flow port and a first pressure detection port, wherein the liquid collection chamber is connected to the water seal chamber, the liquid inlet port and the first pressure detection port are both connected to the liquid collection chamber, and the first gas flow port is connected to the water seal chamber.

[0023] And an overflow protector, wherein the overflow protector and the collection container are two separate components, wherein the overflow protector adopts the overflow protector shown in any of the above embodiments.

[0024] The thoracic drainage device according to the above embodiment has a collection container and a separate overflow preventer. The overflow preventer and the collection container are two independent components that are detachably connected. The collection container is connected to a negative pressure suction device and a pressure detection device through the overflow preventer. In negative pressure suction mode, the overflow preventer in the negative pressure suction channel prevents liquid from flowing to the negative pressure suction device, and the overflow preventer in the pressure detection channel prevents liquid from flowing to the pressure detection device. When gravity drainage is required, the collection container can be separated from the main unit and the overflow preventer. The collection container has a water seal chamber, thus enabling drainage operations to be completed in a traditional gravity drainage mode. Attached Figure Description

[0025] Figure 1 This is a simplified schematic diagram of the thoracic drainage device in one embodiment of this application;

[0026] Figure 2 This is an exploded view of the collection container and overflow protector in one embodiment of this application;

[0027] Figure 3 This is an assembly diagram of the collection container and the overflow protector in one embodiment of this application;

[0028] Figure 4 and 5 These are schematic diagrams of the overflow protection device from two different perspectives in one embodiment of this application;

[0029] Figure 6 This is a schematic diagram of the interfaces on the collection container corresponding to the overflow protector in one embodiment of this application;

[0030] Figure 7 This is a cross-sectional view of the overflow protection device through the second and third gas flow ports in one embodiment of this application.

[0031] Figure 8 This is a cross-sectional view of the overflow protection device (pressure detection channel blocked state) through the second pressure detection interface and the third pressure detection interface in one embodiment of this application;

[0032] Figure 9 This is a cross-sectional view of the overflow protection device (pressure detection channel in the on state) through the second pressure detection interface and the third pressure detection interface in one embodiment of this application. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings. Similar elements in different embodiments are referred to by associated similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of this application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to this application are not shown or described in the specification. This is to avoid obscuring the core parts of this application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0034] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.

[0035] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0036] One embodiment of this application provides a chest drainage device for draining effusion from the pleural cavity of a human body to the outside.

[0037] Please refer to Figure 1 The chest drainage device includes a collection container 100, an overflow protector 200, a drainage tube 300, a pressure detection device 400, and a negative pressure suction device 500. The collection container 100 and the overflow protector 200 are the focus of this application; other components can be found in existing technologies. The negative pressure suction device 500 can be a negative pressure source shared by multiple devices (such as a central negative pressure station in a hospital), with its negative pressure provided to each chest drainage device through an interface located at the bedside. Alternatively, the negative pressure suction device 500 can be a portable negative pressure source integrated within the chest drainage device; in this case, the chest drainage device does not need to be connected to a negative pressure source at the bedside, allowing for more flexible use.

[0038] Please refer to Figure 1 , 26. The collection container 100 has a liquid collection chamber 101 for collecting liquid, a water seal chamber 102 for water sealing, a liquid inlet 103 for liquid to enter the liquid collection chamber 101, a first gas flow port 105, and a first pressure detection port 104. The liquid collection chamber 101 is connected to the water seal chamber 102, the liquid inlet 103 and the first pressure detection port 104 are both connected to the liquid collection chamber 101, and the first gas flow port 105 is connected to the water seal chamber 102.

[0039] The water seal cavity 102 can adopt various existing water seal structures, such as Figure 1 As shown, in one embodiment, the water seal cavity 102 is a generally U-shaped cavity, one end of which is connected to the liquid collection cavity 101 and the other end is connected to the first gas flow interface 105.

[0040] Please refer to Figures 1 to 9 The overflow protection device 200 includes a negative pressure suction channel 210, a pressure detection channel 220, and an overflow prevention filter element 230. The negative pressure suction channel 210 has a second gas flow interface 211 and a third gas flow interface 212. The second gas flow interface 211 is detachably connected to the first gas flow interface 105, and the third gas flow interface 212 is used to connect to the negative pressure suction device 500 to suction gas from the water seal chamber 102 and the liquid collection chamber 101. The pressure detection channel 220 has a second pressure detection interface 221 and a third pressure detection interface 222. The second pressure detection interface 221 is detachably connected to the first pressure detection interface 104, and the third pressure detection interface 222 is used to connect to the pressure detection device 400 to detect the pressure inside the liquid collection chamber 101.

[0041] Please continue to refer to this. Figures 1 to 9 The drainage tube 300 is connected to the liquid inlet 103 of the collection container 100, allowing the liquid drained from the drainage tube 300 to enter the collection container 100. The third gas flow port 212 of the overflow protection device 200 is connected to the negative pressure suction device 500. When the negative pressure suction device 500 extracts gas, the gas in the liquid collection chamber 101 and the water seal chamber 102 is also extracted, creating a negative pressure to draw the liquid in the drainage tube 300 into the liquid collection chamber 101. The third pressure detection port 222 of the overflow protection device 200 is connected to the pressure detection device 400, which can detect the gas pressure parameters in the liquid collection chamber 101 using the pressure sensor 410. In some embodiments, the negative pressure suction device 500 and the pressure detection device 400 can be integrated into a single host 600 or separately installed in different components. The negative pressure suction device 500 can use components such as an air pump to extract gas, thereby creating a negative pressure.

[0042] Please refer to Figure 1 and 7Up to 9, the anti-overflow filter element 230 includes a first filter element 231 and a second filter element 232. The first filter element 231 is disposed in the negative pressure suction channel 210 to prevent liquid from flowing to the negative pressure suction device 500.

[0043] The second filter element 232 is located in the pressure detection channel 220 to prevent liquid from flowing into the pressure detection device 400.

[0044] In the chest drainage device shown in the above embodiment, the overflow protector 200 and the collection container 100 are two independent components, such as Figure 2 and 3 As shown, the two are detachably connected. The collection container 100 is connected to the negative pressure suction device 500 and the pressure detection device 400 via the overflow protection device 200. In negative pressure suction mode, the gas in the liquid collection chamber 101 and the water seal chamber 102 can be suctioned to form a negative pressure. Moreover, the pressure in the liquid collection chamber 101 can be detected by the pressure detection device 400. At the same time, the overflow protection device 200 can also prevent overflow, preventing liquid from flowing to the negative pressure suction device 500 and the pressure detection device 400. In some embodiments, the negative pressure suction channel 210 can be omitted from the overflow protection device 200, so that it is mainly used as an overflow protection structure for the pressure detection channel 220. Alternatively, the pressure detection channel 220 can also be omitted from the overflow protection device 200, and it is mainly used as an overflow protection structure for the negative pressure suction channel 210.

[0045] In existing negative pressure suction modes, the collection container integrates an overflow prevention filter. When the collection container is used for gravity drainage, if liquid flows to the overflow prevention filter, it will cause the filter to expand, blocking the gas outlet of the collection container, leading to gravity drainage failure and even extremely serious safety accidents. However, in the chest drainage device shown in this embodiment, when gravity drainage is required, the collection container 100 can be separated from the main unit 600 and the overflow prevention protector 200. The collection container 100 has a water seal chamber 102, and its first gas flow port 105 can be directly used as the gas outlet for gravity drainage. In this structure, the first filter 231 used to prevent liquid from flowing to the negative pressure suction device 500 is located on the overflow prevention protector 200, which is independently set up with the collection container 100. The first gas flow port 105 does not contain the first filter 231. Therefore, the collection container 100 is able to complete the drainage operation in the traditional gravity drainage mode.

[0046] In some embodiments, pressure detection within the collection chamber 101 is not required in gravity drainage mode, therefore the first pressure detection port 104 on the collection container 100 can be blocked. This blocking operation can be performed by the operator locating and sealing the port. In other embodiments, the thoracic drainage device further includes a blocking component that can removably block the first pressure detection port 104. In negative pressure aspiration mode, this blocking component is idle. In gravity drainage mode, the blocking component can be used to block the first pressure detection port 104 if necessary.

[0047] Please refer to Figures 1 to 3 6. The collection container 100 includes a container shell 110, and the liquid collection chamber 101 and the water seal chamber 102 are both located inside the container shell 110.

[0048] In one embodiment, the first gas flow interface 105 and the first pressure detection interface 104 are located on the top of the top wall or side wall of the container housing 110, so as to better collect gas and reduce the interference of liquid in the liquid collection chamber 101.

[0049] like Figure 2 As shown, in some embodiments, the collection container 100 may also be equipped with a water inlet 106, a positive pressure release port 107, a negative pressure release port 108, a sampling port 120, etc., as required. This can be referred to in the prior art, but will not be described in detail here.

[0050] Please refer to Figure 4 , 5 In sections 7 to 9, the overflow protection device 200 includes a protection housing 240, a negative pressure suction channel 210 and a pressure detection channel 220, all of which are located inside the protection housing 240, and the negative pressure suction channel 210 and the pressure detection channel 220 are separated from each other.

[0051] The second pressure detection interface 221 and the second gas flow interface 211 are located on the first side of the protector housing 240, and the third pressure detection interface 222 and the third gas flow interface 212 are located on the second side of the protector housing 240, with the first side and the second side being arranged opposite to each other.

[0052] The collection container 100 and the overflow protector 200 can be fixedly connected through various detachable structures, such as snap-fit, detachable adhesive, screw, magnetic fixation, and tight fit. Please refer to [reference needed]. Figures 4 to 6 In one embodiment, the collection container 100 and the overflow protector 200 are each provided with corresponding buckle structures 109 and 250, which enable detachable fixing.

[0053] Furthermore, the various interfaces of the collection container 100 and the overflow protector 200 are detachably connected. This detachable connection can also be achieved in various ways, such as snap-fit, detachable adhesive, screw connection, magnetic fixation, and tight fit.

[0054] Please refer to Figure 4 and 6 In one embodiment, at least one of the second gas flow interface 211 and the first gas flow interface 105 has a mating portion made of a flexible material, so as to achieve a sealed connection through the deformation of the flexible material. When the second gas flow interface 211 and the first gas flow interface 105 are pressed together, the mating portion deforms, and a sealed connection is achieved through tight fitting.

[0055] Similarly, the second pressure detection interface 221 and the first pressure detection interface 104 can also be connected using various detachable connection methods. For example, in one embodiment, the second pressure detection interface 221 and the first pressure detection interface 104 are plugged into each other to achieve a sealed connection.

[0056] Please refer to Figure 4 and 6 In one embodiment, the second pressure detection interface 221 has a needle-shaped connector 2211, and the first pressure detection interface 104 has a flexible sealing portion with an insertion channel. The needle-shaped connector 2211 is sealed and inserted into the insertion channel. When the needle-shaped connector 2211 is inserted into the insertion channel, the flexible sealing portion will fit tightly against the needle-shaped connector 2211 to form a seal.

[0057] Referring to the detachable docking structure of the various interfaces between the collection container 100 and the overflow protector 200, in some embodiments, the third pressure detection interface 222 and the third gas flow interface 212 of the overflow protector 200 can also be sealed and docked with other components, such as the negative pressure suction device 500 and the pressure detection device 400, in a similar detachable manner. Of course, in other embodiments, the overflow protector 200 and other components, such as the negative pressure suction device 500 and the pressure detection device 400, can also achieve sealed communication using a structure that is difficult to disassemble.

[0058] Furthermore, the first filter element 231 and the second filter element 232 are typically made of materials that can expand when exposed to water and block the corresponding channels, such as, but not limited to, PE sintered materials.

[0059] Please refer to Figure 7 In one embodiment, the first filter element 231 has a cylindrical structure, with its opening 2311 facing the end where the second gas flow interface 211 is located. When liquid enters the second gas flow interface 211 with the airflow, it can be collected into the inner cavity of the first filter element 231.

[0060] To improve the filtration effect, in one embodiment, please continue to refer to... Figure 7 The opening 2311 of the first filter element 231 is sealed and connected with the opening wall of the second gas flow interface 211.

[0061] On the other hand, when a user uses a negative pressure suction chest drainage device for drainage, if they want to get up and walk around, in order to avoid their chest cavity coming into contact with the outside air, they must carry the entire chest drainage device with them, which is very inconvenient.

[0062] This application provides a structure in which the collection container 100 and the overflow protector 200 can be separated from the main unit 600 (including the negative pressure suction device 500 and the pressure detection device 400). Therefore, when the user needs to move around, he / she can carry only the collection container 100 and the overflow protector 200 instead of carrying the entire main unit 600, which is more convenient.

[0063] However, considering that the overflow protector 200 has a pressure detection channel 220, which will be exposed to air after being detached from the pressure detection device 400, in one embodiment of this application, the overflow protector 200 also includes a seal. When the overflow protector 200 is detached from the negative pressure suction device 500, the seal seals the pressure detection channel 220 under its own elasticity or the driving force of other driving components.

[0064] The seal can seal the pressure detection channel 220 by its own elasticity. In one embodiment, the seal is at least partially made of a flexible elastic material and relies on its own elasticity to seal the pressure detection channel 220.

[0065] In other embodiments, the overflow protection device 200 may further include a drive component that is connected to the seal and drives the seal pressure detection channel 220. The drive component may be, but is not limited to, elastic elements, motors, electromagnets, or other structures capable of driving the movement of the seal.

[0066] Furthermore, the purpose of this seal is to block the pressure detection channel 220, thereby preventing the user's chest cavity from communicating with the outside air. Therefore, the seal can seal any position of the pressure detection channel 220, such as the second pressure detection interface 221, the third pressure detection interface 222, and other positions in the pressure detection channel 220.

[0067] The seal can seal the second pressure detection interface 221 and the third pressure detection interface 222 from the outside of the pressure detection channel 220, or it can seal from inside the pressure detection channel 220. For example, in one embodiment, the seal is located inside the pressure detection channel 220, while in other embodiments, the seal is located on the outside of the pressure detection channel 220.

[0068] Taking the sealed third pressure detection interface 222 as an example, in one embodiment, the overflow protection device 200 further includes a sealing component, which is used to seal the third pressure detection interface 222 when the overflow protection device 200 is disconnected from the negative pressure suction device 500.

[0069] Further, please refer to Figure 8 and 9 The pressure detection channel 220 has a mounting cavity 271, which communicates with the third pressure detection interface 222. The sealing assembly includes a seal 261 and an elastic element 262. The seal 261 is movably disposed within the mounting cavity 271, and the elastic element 262 acts on the seal 261, including direct or indirect connection between the elastic element 262 and the seal 261. The elastic force of the elastic element 262 drives the seal 261 to seal the third pressure detection interface 222; that is, under the drive of the elastic element 262, the seal 261 is normally closed, and always seals the third pressure detection interface 222 when no external force is applied. When the overflow protector 200 is connected to the pressure detection device 400, the interface on the pressure detection device 400 can be inserted into the third pressure detection interface 222, thereby opening the seal 261 and allowing the pressure detection channel 220 to conduct.

[0070] Further, please refer to Figure 8 and 9 In one embodiment, the seal 261 has a sealing portion 2611 and a connecting portion 2612 connected to the sealing portion 2611. The sealing portion 2611 is disposed toward the third pressure detection interface 222. An elastic member 262 acts on the connecting portion 2612 to drive the sealing portion 2611 to seal the third pressure detection interface 222. If the elastic member 262 is a spring, it can be sleeved on the connecting portion 2612.

[0071] Please refer to Figures 7 to 9In one embodiment, to form the aforementioned mounting cavity 271, a partition 272 is provided in the negative pressure suction channel 210. This partition 272, together with the protector housing 240, forms a mounting cavity 271 isolated from the negative pressure suction channel 210. A pressure detection channel 220 is formed by connecting the second pressure detection interface 221, the mounting cavity 271, and the third pressure detection interface 222 via a conduit 275. For ease of installation, the partition 272 has an opening to allow the sealing element 261 and the elastic element 262 to be placed into the mounting cavity 271. The opening is then sealed by a sealing plug 273. The conduit 275 can be connected to a connector 274, which passes through the sealing plug 273 and extends into the mounting cavity 271. The connector 274 has a through hole, thereby communicating with the mounting cavity 271.

[0072] In one embodiment, the sealing portion 2611 is made of a flexible material, thus allowing for a better fit with the third pressure detection interface 222. The connecting portion 2612 can be made of a more rigid material, thereby reducing its deformation and better transmitting elastic force.

[0073] On the other hand, one embodiment of this application also provides a collection container for chest drainage, which can adopt the structure of collection container 100 as shown in any of the above embodiments. This collection container can be used as part of a chest drainage device (such as a negative pressure aspiration type) or independently in a gravity aspiration mode for drainage. That is, the collection container can be sold and used together with a chest drainage device, or it can be sold and used independently. This collection container has two application modes, allowing users to flexibly choose how to use it according to their needs.

[0074] The above examples illustrate the present invention only to aid in understanding it and are not intended to limit the scope of the invention. Those skilled in the art can make various simple deductions, modifications, or substitutions based on the principles of this invention.

Claims

1. An overflow protection device for a chest drainage system, characterized in that, The device includes a protective housing, within which are provided a negative pressure suction channel, a pressure detection channel, and an overflow prevention filter element. The negative pressure suction channel and the pressure detection channel are separated from each other. The negative pressure suction channel is detachably connected to the water seal chamber of the collection container. The pressure detection channel is connected to the liquid collection chamber of the collection container. The overflow prevention filter element is provided in both the negative pressure suction channel and the pressure detection channel. The filter element is made of a material that expands upon contact with water and can block the corresponding channel to prevent liquid overflow. The protector housing has a second gas flow interface, a third gas flow interface, a second pressure detection interface, and a third pressure detection interface. The second gas flow interface, the internal space of the protector housing, and the third gas flow interface are connected to form the negative pressure suction channel. The second gas flow interface is used to connect to the first gas flow interface of the collection container in a detachable manner. The protector housing is provided with a partition, and the partition and the protector housing form an installation cavity that is isolated from the negative pressure suction channel. The second pressure detection interface, the installation cavity and the third pressure detection interface are connected by a pipeline to form the pressure detection channel. The overflow protection device also includes a sealing component, which is used to seal the third pressure detection interface when the overflow protection device is disconnected from the negative pressure suction device. When gravity flow is required, the overflow protection device can be separated from the collection container so that the first gas flow interface can be used directly as the gas outlet for gravity flow.

2. The overflow protection device as described in claim 1, characterized in that, The third gas flow port is used to connect with the negative pressure suction device to suction gas from the collection container; the second pressure detection port is used to connect detachably with the collection container, and the third pressure detection port is used to connect with the pressure detection device to detect the pressure inside the collection container; the anti-overflow filter element includes a first filter element and a second filter element, the first filter element is disposed in the negative pressure suction channel to prevent liquid from flowing to the negative pressure suction device, and the second filter element is disposed in the pressure detection channel to prevent liquid from flowing to the pressure detection device.

3. The overflow protection device as described in claim 2, characterized in that, The first filter element has a cylindrical structure with its opening facing the end where the second gas flow interface is located.

4. The overflow protection device as described in claim 3, characterized in that, The opening wall of the first filter element is sealed and connected to the opening wall of the second gas flow interface.

5. The overflow protection device as described in claim 1, characterized in that, The sealing assembly includes a sealing element and an elastic element. The sealing element is movably disposed within the mounting cavity. The elastic element acts on the sealing element, and the elastic force of the elastic element drives the sealing element to seal the third pressure detection interface.

6. The overflow protection device as described in claim 5, characterized in that, The seal has a sealing portion and a connecting portion connected to the sealing portion. The sealing portion is disposed toward the third pressure detection interface. The elastic element acts on the connecting portion to drive the sealing portion to seal the third pressure detection interface.

7. An overflow protection device for a chest drainage system, characterized in that, The device includes a protective housing, within which are a negative pressure suction channel, a pressure detection channel, an overflow prevention filter element, and a seal. The pressure detection channel has a second pressure detection interface and a third pressure detection interface. The second pressure detection interface is used to communicate with a collection container, and the third pressure detection interface is used to detachably communicate with a pressure detection device to detect the pressure inside the collection container. The overflow prevention filter element includes a second filter element disposed within the pressure detection channel. The second filter element is made of a material that expands upon contact with water and can block the corresponding channel to prevent liquid from flowing into the pressure detection device. When the overflow prevention device is detached from the negative pressure suction device, the seal element seals the pressure detection channel under its own elasticity or the driving force of a driving component. The second pressure detection interface and the third pressure detection interface are provided on the protector housing. The protector housing also has a second gas flow interface and a third gas flow interface. The second gas flow interface, the internal space of the protector housing and the third gas flow interface are connected to form the negative pressure suction channel. The second gas flow interface is used to connect to the first gas flow interface of the collection container in a detachable manner. The protector housing is provided with a partition, and the partition and the protector housing form an installation cavity that is isolated from the negative pressure suction channel. The second pressure detection interface, the installation cavity and the third pressure detection interface are connected by a pipeline to form the pressure detection channel. When gravity flow is required, the overflow protection device can be separated from the collection container so that the first gas flow interface can be used directly as the gas outlet for gravity flow.

8. The overflow protection device as described in claim 7, characterized in that, The seal is located within the pressure detection channel.

9. The overflow protection device as described in claim 7, characterized in that, It also includes a drive component, which is connected to the seal and drives the seal to seal the pressure detection channel.

10. The overflow protection device as described in claim 7, characterized in that, The driving component includes an elastic element, and the sealing element is movably disposed within the mounting cavity. The elastic element acts on the sealing element, and the elastic force of the elastic element drives the sealing element to seal the third pressure detection interface.

11. The overflow protection device as described in claim 10, characterized in that, The seal has a sealing portion and a connecting portion connected to the sealing portion. The sealing portion is disposed toward the third pressure detection interface. The elastic element acts on the connecting portion to drive the sealing portion to seal the third pressure detection interface.

12. The overflow protection device as described in claim 7, characterized in that, The seal is at least partially made of a flexible, elastic material, which seals the pressure detection channel by its own elasticity.

13. A chest drainage device, characterized in that, include: A collection container having a liquid collection chamber for collecting liquid, a water seal chamber for water sealing, a liquid inlet for liquid to enter the liquid collection chamber, a first gas flow port and a first pressure detection port, wherein the liquid collection chamber is connected to the water seal chamber, the liquid inlet port and the first pressure detection port are both connected to the liquid collection chamber, and the first gas flow port is connected to the water seal chamber. And an overflow protector, wherein the overflow protector and the collection container are two separate components, wherein the overflow protector is an overflow protector as described in any one of claims 1-12.

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