A three-chamber drainage bottle structure to prevent cross-contamination and a closed thoracic drainage device having the same structure.

Abstract

This invention provides a three-chamber drainage bottle anti-cross-flow structure and a closed thoracic drainage device incorporating it. The three-chamber drainage bottle anti-cross-flow structure includes a sealed shell, a suction tube, a first control switch, and a second control switch. In use, the sealed shell is installed above the drainage bottle, the second control switch is connected to the suction port, and the suction tube is sealed inside the inlet, with one end connected to the collection port and the other end flush with the 0 level line. Initially, the first control switch is closed and the second control switch is open. In case of cross-flow, the first control switch is opened and the second control switch is closed. Under negative pressure, the suction tube draws liquid into the working chamber. After suction is complete, the first control switch is closed and the second control switch is opened, allowing the liquid in the working chamber to flow into the pressure regulating bottle. This invention can drain excess liquid from the water-sealed bottle, thereby reducing the frequency of drainage bottle replacement and lowering patient medical costs. This device can be directly used with existing drainage bottles and is suitable for widespread application.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a three-chamber drainage bottle anti-cross-flow structure and a closed thoracic drainage device having the same. Background Technology

[0002] Closed chest drainage involves inserting one end of a drainage tube into the chest cavity and connecting the other end to a water-seal bottle positioned lower than the tube. This allows for the removal of gas or the collection of fluid from the chest cavity, enabling the lung tissue to reopen and restore its function.

[0003] Three-chamber drainage bottles are commonly used for closed chest drainage, capable of draining pleural effusion and removing air. A typical three-chamber drainage bottle consists of a collection bottle (01), a water-seal bottle (02), and a pressure-regulating bottle (03), arranged sequentially. The collection bottle (01) collects the effusion; the water-seal bottle (02) isolates the air in the chest cavity from the atmosphere to prevent open pneumothorax; and the pressure-regulating bottle (03) controls the negative pressure suction. When installing the three-chamber drainage bottle, physiological saline needs to be added to both the water-seal bottle (02) and the pressure-regulating bottle (03). Specifically, use a funnel to add physiological saline through the water-seal bottle's inlet (021) until the liquid level is level with the 0 level line. At this point, the water-seal tube (022) should be submerged approximately 1-2 cm below the liquid level in the water-seal bottle. Similarly, use a funnel to add physiological saline through the pressure-regulating bottle's suction port (031) until the liquid level is level with the 12 level line. At this point, the pressure-regulating tube (032) should be submerged approximately 11 cm below the liquid level in the pressure-regulating bottle.

[0004] The inventors discovered in their daily work that some patients with severe pneumothorax experience violent coughing, which causes drastic fluctuations in the fluid level within the pressure regulating bottle 03 (in severe cases, even causing fluid to overflow through the pressure regulating tube 032). Simultaneously, coughing or changes in position can also cause the drainage bottle to shake through connecting tubing and the bed. During this process, cross-contamination frequently occurs between the pressure regulating bottle 03 and the water-seal bottle 02; that is, fluid from the pressure regulating bottle 03 often enters the water-seal bottle 02 through the connection port 023 between the two bottles. This causes the fluid level in the pressure regulating bottle 003 to drop below the normal level, while the fluid level in the water-seal bottle 002 rises above the normal level. Consequently, the actual negative pressure in the patient's chest cavity decreases, making it difficult for air to escape. A drop in the fluid level (003) of the pressure regulating bottle can be resolved by promptly replenishing fluid in 03. However, there is no clinical solution for the fluid level (002) of the water seal bottle exceeding the normal level. Currently, the entire three-chamber drainage bottle is replaced immediately upon noticing an increase in the fluid level (002). Because this problem frequently occurs in the same patient, frequent replacement of the three-chamber drainage bottle is necessary. On one hand, frequent replacement increases the patient's medical expenses, especially given the high cost of these bottles, further burdening the patient financially. On the other hand, excessively frequent replacement may affect the continuity and stability of treatment, and may increase the risk of accidental dislodgement and introduction of external bacteria, thus negatively impacting the patient's recovery.

[0005] Therefore, there is a need for a device that can safely drain the liquid exceeding the normal water level from the water-sealed bottle in a timely manner. Utility Model Content

[0006] Therefore, the technical problem to be solved by this utility model is to overcome the technical defects in the prior art where, when cross-contamination occurs between the pressure regulating bottle and the water seal bottle, only the three-chamber drainage bottle can be replaced, thereby increasing the patient's medical expenses and economic burden; at the same time, frequent replacement of the three-chamber drainage bottle will affect the continuity and stability of treatment and increase the risk of accidental tube dislodgement and introduction of external bacteria. Therefore, this invention provides a three-chamber drainage bottle anti-cross-contamination structure that can safely drain the liquid exceeding the normal water level line from the water seal bottle in a timely manner.

[0007] Therefore, this utility model provides a three-chamber drainage bottle anti-cross-flow structure, comprising:

[0008] A sealed housing, suitable for placement above a three-chamber drainage bottle, has a working chamber inside, a drain port at the bottom, a collection port in the middle, and a negative pressure interface suitable for communication with a negative pressure device above the collection port; the drain port, the collection port, and the negative pressure interface are respectively connected to the working chamber;

[0009] A suction tube is suitable for sealing and installing in the liquid filling port of a water-sealed bottle through an installation structure. One end is connected to the liquid collection port, and the other end can extend into the water-sealed bottle after the suction tube is installed in place, with the end flush with the 0 water level line inside the water-sealed bottle.

[0010] The first control switch is used to control the passage between the liquid collection port and the liquid suction tube, so as to connect or disconnect them.

[0011] A second control switch is installed on the drain port and is adapted to be connected to the suction port of the pressure regulating bottle. It is used to control the passage between the drain port and the suction port, so as to connect or disconnect them.

[0012] Furthermore, the drain outlet is located at the bottom of the sealed housing at the end away from the collection port.

[0013] Furthermore, the bottom of the sealed shell is approximately funnel-shaped, and the drain outlet is located at the lowest point of the funnel-shaped structure.

[0014] Furthermore, it also includes:

[0015] A baffle plate is fixedly installed on the side wall of the sealed housing between the liquid collection port and the liquid discharge port, and is positioned opposite to the liquid collection port. The bottom of the baffle plate has a gap with the bottom of the sealed housing.

[0016] Furthermore, the mounting structure includes:

[0017] A sealing plug is adapted to be detachably and sealingly installed inside the liquid filling port of the water-sealed bottle. The sealing plug has a through hole in the middle, and the liquid suction tube is sealed through the through hole.

[0018] Furthermore, the second control switch is provided with a first pipe connector.

[0019] Furthermore, a second pipe connector is provided on the negative pressure interface.

[0020] Furthermore, both the first pipe fitting and the second pipe fitting are pagoda-type pipe fittings.

[0021] Furthermore, the first control switch is a hydraulic valve, which is installed in series between the suction pipe and the collection port.

[0022] This utility model also provides a closed thoracic drainage device, including a three-chamber drainage bottle and a three-chamber drainage bottle anti-cross-flow structure as described in any of the above claims;

[0023] The three-chamber drainage bottle includes a liquid collection bottle, a water seal bottle, and a pressure regulating bottle arranged in sequence.

[0024] The sealed housing of the three-chamber drainage bottle anti-cross-flow structure is located above the three-chamber drainage bottle. The second control switch of the three-chamber drainage bottle anti-cross-flow structure is connected to the suction port of the pressure regulating bottle. The suction tube of the three-chamber drainage bottle anti-cross-flow structure is sealed and installed in the liquid filling port of the water seal bottle through the mounting structure. One end is connected to the liquid collection port of the three-chamber drainage bottle anti-cross-flow structure, and the other end extends into the interior of the water seal bottle, with the end flush with the 0 water level line inside the water seal bottle.

[0025] The technical solution provided by this utility model has the following advantages:

[0026] 1. The present invention relates to a three-chamber drainage bottle anti-cross-flow structure and a closed thoracic drainage device having the same, comprising a sealed shell, a suction tube, a first control switch, and a second control switch; the sealed shell is adapted to be disposed above the three-chamber drainage bottle, has a working chamber inside, a drain port at the bottom, a collection port in the middle, and a negative pressure interface adapted to be connected to a negative pressure device above the collection port; the drain port, collection port, and negative pressure interface are respectively connected to the working chamber; the suction tube is adapted to be sealed and installed in the liquid inlet of a water-sealed bottle through an installation structure, one end of which is connected to the collection port, and the other end of which can extend into the water-sealed bottle after the suction tube is installed in place, and the end of which is flush with the 0 water level line in the water-sealed bottle; the first control switch is used to control the passage between the collection port and the suction tube, so as to connect or disconnect them; the second control switch is installed on the drain port and is adapted to be connected to the suction port of a pressure regulating bottle, so as to control the passage between the drain port and the suction port, so as to connect or disconnect them.

[0027] In use, the sealed housing is installed above the three-chamber drainage bottle that has already been installed (including pipe connections and the injection of a specified amount of saline into each bottle). The second control switch is connected to the suction port of the pressure regulating bottle. The suction tube is sealed and installed inside the liquid inlet of the water-seal bottle through the installation structure. One end of the suction tube is sealed and connected to the collection port, and the other end is flush with the 0 water level line in the water-seal bottle. In the initial state, the first control switch can be set to close the passage between the suction tube and the collection port, and the second control switch can be set to open the passage between the drain port and the suction port. During chest drainage of the patient using a negative pressure device, if medical staff or the patient's family finds that the liquid level in the water-seal bottle has risen above the normal water level line (the liquid level in the water-seal bottle has already submerged the other end of the suction tube), it indicates that cross-contamination may have occurred. At this time... Medical staff or patients' families can operate the first control switch to open the passage between the suction tube and the collection port, and simultaneously operate the second control switch to close the passage between the drain port and the suction port. Under the negative pressure inside the sealed shell, the suction tube draws the liquid that has submerged its other end into the tube and discharges it into the working chamber of the sealed shell through the collection port. When the liquid level in the water seal bottle drops until the other end of the suction tube is exposed again, the suction tube stops drawing liquid. At this time, medical staff can operate the control switch to close the passage between the suction tube and the collection port, and simultaneously operate the second control switch to open the passage between the drain port and the suction port (or the negative pressure device can be turned off at the same time). At this time, the liquid inside the working chamber flows from inside the sealed shell through the drain port, the second control switch, and the suction port of the pressure regulating bottle into the pressure regulating bottle under the action of gravity.

[0028] This invention's three-chamber drainage bottle anti-cross-flow structure can promptly drain excess liquid above the 0-level mark in the water-seal bottle when cross-flow occurs between the pressure regulating bottle and the water-seal bottle. This reduces the frequency of three-chamber drainage bottle replacement, thereby decreasing the risk of accidental dislodgement and introduction of external bacteria due to frequent bottle changes, and lowering patient medical costs. Simultaneously, when draining excess liquid from the water-seal bottle, this excess liquid can be reinjected into the pressure regulating bottle through a closed conduit, further reducing the chance of contact between the internal liquid of the three-chamber drainage bottle and the external environment, preventing contamination. Furthermore, this device can be directly applied to existing three-chamber drainage bottles without modification, thus reducing usage costs, expanding applicability, and making it suitable for widespread adoption.

[0029] 2. This utility model also provides a closed thoracic drainage device, including a three-chamber drainage bottle and a three-chamber drainage bottle anti-cross-flow structure as described in any of the above claims; the three-chamber drainage bottle includes a fluid collection bottle, a water seal bottle, and a pressure regulating bottle arranged sequentially; the sealed shell of the three-chamber drainage bottle anti-cross-flow structure is disposed above the three-chamber drainage bottle, and the second control switch of the three-chamber drainage bottle anti-cross-flow structure is connected to the suction port of the pressure regulating bottle; the suction tube of the three-chamber drainage bottle anti-cross-flow structure is sealed and installed in the liquid filling port of the water seal bottle through an installation structure, one end of which is connected to the liquid collection port of the three-chamber drainage bottle anti-cross-flow structure, and the other end extends into the interior of the water seal bottle, with the end flush with the 0 water level line inside the water seal bottle.

[0030] This invention relates to a closed thoracic drainage device that can promptly drain excess fluid above the 0-level mark in the water-seal bottle when cross-contamination occurs between the pressure regulating bottle and the water-seal bottle. This reduces the frequency of changing the three-lumen drainage bottle, thereby decreasing the risk of accidental dislodgement and introduction of external bacteria during bottle replacement. Simultaneously, when draining excess fluid from the water-seal bottle, this excess fluid can be reinjected into the pressure regulating bottle through a closed tubing, further minimizing contact between the internal fluid of the three-lumen drainage bottle and the external environment, thus preventing contamination. The three-lumen drainage bottle used in this invention is an existing product and can be purchased from the market, reducing operating costs and facilitating its widespread clinical application. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the prior art or specific embodiments of this utility model, the accompanying drawings used in the description of the prior art or specific embodiments are briefly introduced below.

[0032] Figure 1 This is a schematic diagram of the overall structure of the three-chamber drainage bottle anti-liquid cross-contamination structure of this utility model.

[0033] Figure 2 This is a schematic diagram of the structure for installing the anti-cross-flow structure of the three-chamber drainage bottle together with the three-chamber drainage bottle.

[0034] Reference numerals: 002, liquid level in water seal bottle; 003, liquid level in pressure regulating bottle; 01, liquid collection bottle; 02, water seal bottle; 021, liquid inlet; 022, water seal pipe; 023, connecting port; 03, pressure regulating bottle; 031, suction port; 032, pressure regulating pipe; 1, sealed shell; 100, working chamber; 11, drain port; 12, collection port; 13, negative pressure interface; 14, baffle plate; 140, gap; 15, first pipe joint; 16, second pipe joint; 2, suction pipe; 3, control switch; 4, sealing plug; 41, through hole; 5, second control switch. Detailed Implementation

[0035] To enable those skilled in the art to better understand this solution, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0036] It should be noted that the terms "first," "second," etc., in the claims and specification of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such as a process, method, system, product, or device that includes a series of steps or units, not limited to those steps or units explicitly listed, but may also include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices.

[0037] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the term "multiple" should mean two or more. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0038] The present application will now be described in detail with reference to the accompanying drawings and embodiments. Example 1

[0039] This embodiment provides a three-chamber drainage bottle structure to prevent cross-contamination of liquids, such as... Figure 1As shown, it includes a sealed housing 1, a suction tube 2, and a control switch 3. The sealed housing 1 is adapted to be positioned above a three-chamber drainage bottle, and has a working chamber 100 inside. A drain port 11 is provided at the bottom, and a collection port 12 is provided in the middle. A negative pressure interface 13, suitable for communication with a negative pressure device, is provided above the collection port 12. The drain port 11, the collection port 12, and the negative pressure interface 13 are respectively connected to the working chamber 100. The suction tube 2 is adapted to be sealed and installed in the liquid filling port 021 of the water-sealed bottle through an installation structure, with one end... One end is connected to the liquid collection port 12, and the other end can extend into the water seal bottle 02 after the liquid suction tube 2 is installed in place, with the end flush with the 0 water level line inside the water seal bottle 02; the first control switch 3 is used to control the passage between the liquid collection port 12 and the liquid suction tube 2, so as to connect and disconnect them; the second control switch 5 is installed on the liquid discharge port 11 and is adapted to be connected to the pressure regulating bottle suction port 031, so as to control the passage between the liquid discharge port 11 and the suction port 031, so as to connect or disconnect them.

[0040] In this embodiment, both the sealed housing 1 and the suction tube 2 can be made of medical-grade transparent plastic material. The transparency allows medical personnel to easily observe the contents of the sealed housing 1 and the suction tube 2. The first control switch 3 can be a hemostat, a flow regulator, or a hydraulic valve connected in series between the suction tube 2 and the collection port 12. The second control switch 5 can be a hydraulic valve installed on the drain port 11. The hemostat, flow regulator, and hydraulic valve can all be purchased from existing commercial products, and will not be described in detail here. During use, as follows... Figure 2As shown, the sealed housing 1 is placed above the three-chamber drainage bottle that has been installed (including pipe connections, injection of a specified amount of saline into each bottle, etc.). The second control switch 5 is connected to the suction port 031 of the pressure regulating bottle. The suction tube 2 is sealed and installed in the liquid filling port 021 of the water-sealed bottle through the installation structure. One end of the suction tube 2 is sealed and connected to the collection port 12, and the other end is flush with the 0 water level line in the water-sealed bottle 02. In the initial state, the first control switch 3 can be set to close the passage between the suction tube 2 and the collection port 12, and the second control switch 5 can be set to open the passage between the drain port 11 and the suction port 031. During the process of performing chest drainage on the patient using the negative pressure device, when medical staff or the patient's family find that the liquid level 002 of the water-sealed bottle is higher than the normal water level line (the liquid level 002 of the water-sealed bottle has submerged the other end of the suction tube 2), it indicates that cross-contamination may have occurred. At this time, the medical staff Alternatively, the patient's family can operate the first control switch 3 to open the passage between the suction tube 2 and the collection port 12, while simultaneously operating the second control switch 5 to close the passage between the drain port 11 and the suction port 031. Under the negative pressure inside the sealed housing 1, the suction tube 2 draws the liquid that has submerged its other end into the tube and discharges it into the working chamber 100 of the sealed housing 1 through the collection port 12. When the liquid level 002 in the water seal bottle drops to the point where the other end of the suction tube 2 is exposed again, the suction tube 2 stops drawing liquid. At this time, medical staff can operate the control switch 3 to close the passage between the suction tube 2 and the collection port 12, while simultaneously operating the second control switch 5 to close the passage between the drain port 11 and the suction port 031 (or the negative pressure device can be turned off at the same time). At this time, the liquid that has entered the working chamber 100 flows into the pressure regulating bottle 03 along the inner wall of the sealed housing 1 and the inner wall of the pressure regulating bottle suction port 031 under the action of gravity.

[0041] The anti-cross-flow structure of the three-chamber drainage bottle in this embodiment can promptly drain excess liquid above the 0 water level in the water seal bottle 02 when cross-flow occurs between the pressure regulating bottle 03 and the water seal bottle 02. This reduces the frequency of changing the three-chamber drainage bottle, thereby reducing the risk of accidental dislodgement and introduction of external bacteria due to frequent bottle changes, and also lowering the patient's medical costs. Simultaneously, when draining excess liquid from the water seal bottle 02, this excess liquid can be reinjected into the pressure regulating bottle 03 through a closed conduit, further reducing the chance of contact between the internal liquid of the three-chamber drainage bottle and the external environment, thus preventing contamination. Furthermore, this device can be directly applied to existing three-chamber drainage bottles without modification, thereby reducing usage costs and expanding its applicability.

[0042] In this embodiment, the three-chamber drainage bottle anti-cross-flow structure further includes a drain port 11 located at the bottom of the sealed housing 1 at an end away from the collection port 12.

[0043] In this embodiment, the positions of the drain port 11 and the collection port 12 are far apart from each other, which can ensure that the liquid discharged from the collection port 12 flows along the bottom inner wall of the sealed shell 1 to the drain port 11, avoiding the generation of bubbles after the liquid directly enters the drain port 11, thus reducing the discharge rate of subsequent liquid.

[0044] In this embodiment, the three-chamber drainage bottle anti-cross-flow structure further includes a bottom approximately funnel-shaped structure for the sealed shell 1, with the drain port 11 located at the lowest point of the funnel-shaped structure.

[0045] In this embodiment, the funnel-shaped structure allows the liquid entering the working chamber 100 to flow quickly to the drain port 11, thereby reducing the accumulation of liquid at the bottom of the sealed housing 1 and improving the efficiency of liquid discharge into the pressure regulating bottle 03.

[0046] The three-chamber drainage bottle anti-cross-flow structure of this embodiment further includes a baffle plate 14. The baffle plate 14 is fixedly disposed on the side wall of the sealed housing 1 between the liquid collection port 12 and the liquid discharge port 11, and is disposed opposite to the liquid collection port 12. The bottom of the baffle plate 14 has a gap 140 with the bottom of the sealed housing 1.

[0047] In this embodiment, the baffle plate 14 can block the liquid discharged from the collection port 12. When the liquid is discharged from the collection port 12, if the liquid pressure is high and the flow rate is fast, it will first hit the baffle plate 14, then flow down along the baffle plate 14 to the bottom of the sealed housing 1, and finally flow through the gap 140 to the drain port 11, and enter the pressure regulating bottle 03 through the drain port 11. The baffle plate 14 can buffer the pressure of the liquid discharged from the collection port 12, so that this part of the liquid can flow smoothly through the bottom of the sealed housing 1 to the drain port 11, avoiding the formation of bubbles after the liquid directly enters the drain port 11, thus reducing the discharge rate of subsequent liquids.

[0048] In this embodiment, the three-chamber drainage bottle anti-cross-liquid structure further includes a sealing plug 4, which is adapted to be detachably and sealed in the liquid filling port 021 of the water seal bottle. The sealing plug 4 has a through hole 41 in the middle, and the liquid suction tube 2 is sealed through the through hole 41.

[0049] In this embodiment, the sealing plug 4 can be made of medical-grade rubber or silicone. The sealing plug 4 is in compression contact with both the liquid inlet 021 and the suction tube 2, allowing for quick assembly and disassembly of the sealing plug 4 and the suction tube 2 by insertion and removal. There is frictional resistance between the outer wall of the sealing plug 4 and the inner wall of the liquid inlet 021, and between the inner wall of the through hole 41 and the outer wall of the suction tube 2, thereby firmly fixing the suction tube 2 inside the liquid inlet 021.

[0050] In this embodiment, the three-chamber drainage bottle anti-cross-liquid structure further includes a first pipe connector 15 on the second control switch 5.

[0051] In this embodiment, the three-chamber drainage bottle anti-cross-liquid structure further includes a second pipe connector 16 on the negative pressure interface 13.

[0052] In this embodiment, the three-chamber drainage bottle anti-cross-flow structure further includes the first pipe connector 15 and the second pipe connector 16 being pagoda-type pipe connectors.

[0053] In this embodiment, both the first pipe connector 15 and the second pipe connector 16 are pagoda-type pipe connectors. The pagoda-type connectors can be adapted to the pipelines used in existing three-chamber drainage bottles, thereby improving the applicability of this device and reducing the cost of use. Example 2

[0054] This embodiment provides a closed chest drainage device, such as... Figure 2 As shown, the device includes a three-chamber drainage bottle and the three-chamber drainage bottle anti-cross-flow structure in Example 1. The three-chamber drainage bottle includes a liquid collection bottle 01, a water seal bottle 02, and a pressure regulating bottle 03 arranged sequentially. The sealed housing 1 of the three-chamber drainage bottle anti-cross-flow structure is located above the three-chamber drainage bottle. The second control switch 5 of the three-chamber drainage bottle anti-cross-flow structure is connected to the suction port 031 of the pressure regulating bottle 03. The suction tube 2 of the three-chamber drainage bottle anti-cross-flow structure is sealed and installed in the liquid filling port 021 of the water seal bottle 02 through an installation structure. One end is connected to the liquid collection port 12 of the three-chamber drainage bottle anti-cross-flow structure, and the other end extends into the interior of the water seal bottle 02, with the end flush with the zero water level line inside the water seal bottle 02.

[0055] The closed thoracic drainage device of this embodiment can promptly drain excess fluid above the 0 level in the water-seal bottle when cross-contamination occurs between the pressure regulating bottle 03 and the water-seal bottle 02. This reduces the frequency of changing the three-lumen drainage bottle, thereby decreasing the risk of accidental dislodgement and introduction of external bacteria during bottle replacement. Simultaneously, when draining excess fluid from the water-seal bottle, this excess fluid can be reinjected into the pressure regulating bottle through a closed tubing, further reducing contact between the internal fluid of the three-lumen drainage bottle and the external environment, thus preventing contamination. The three-lumen drainage bottle used in this embodiment is a product of existing technology and can be purchased from the market, thereby reducing usage costs and facilitating its widespread clinical application.

[0056] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this innovative technical solution.

Claims

1. A three-chamber drainage bottle structure to prevent cross-contamination of liquids, characterized in that, include: A sealed housing (1) is suitable for being installed above a three-chamber drainage bottle. It has a working chamber (100) inside, a drain port (11) at the bottom, a collection port (12) in the middle, and a negative pressure interface (13) suitable for communicating with a negative pressure device above the collection port (12). The drain port (11), the collection port (12) and the negative pressure interface (13) are respectively connected to the working chamber (100). The suction tube (2) is suitable for sealing and installing in the liquid filling port (021) of the water seal bottle through the installation structure. One end is connected to the liquid collection port (12), and the other end can extend into the water seal bottle (02) after the suction tube (2) is installed in place, and the end is flush with the 0 water level line in the water seal bottle (02). The first control switch (3) is used to control the passage between the liquid collection port (12) and the liquid suction tube (2) so that they are connected or disconnected; The second control switch (5) is installed on the drain port (11) and is adapted to be connected to the suction port (031) of the pressure regulating bottle. It is used to control the passage between the drain port (11) and the suction port (031) so that they can be connected or disconnected.

2. The anti-cross-liquid structure of the three-chamber drainage bottle according to claim 1, characterized in that, The drain port (11) is located at the bottom of the sealed housing (1) at one end away from the collection port (12).

3. The anti-cross-flow structure of the three-chamber drainage bottle according to claim 1, characterized in that, The bottom of the sealed shell (1) is approximately funnel-shaped, and the drain port (11) is located at the lowest point of the funnel-shaped structure.

4. The anti-cross-flow structure of the three-chamber drainage bottle according to claim 3, characterized in that, Also includes: A baffle plate (14) is fixedly installed on the side wall of the sealed housing (1) between the liquid collection port (12) and the liquid discharge port (11), and is arranged opposite to the liquid collection port (12). The bottom of the baffle plate (14) has a gap (140) with the bottom of the sealed housing (1).

5. The anti-cross-flow structure of the three-chamber drainage bottle according to claim 1, characterized in that, The mounting structure includes: A sealing plug (4) is adapted to be detachably and sealed inside the liquid inlet (021). The sealing plug (4) has a through hole (41) in the middle, and the liquid suction tube (2) is sealed through the through hole (41).

6. The anti-cross-flow structure of the three-chamber drainage bottle according to claim 1, characterized in that, The second control switch (5) is provided with a first pipe joint (15).

7. The anti-cross-liquid structure of the three-chamber drainage bottle according to claim 6, characterized in that, The negative pressure port (13) is provided with a second pipe connector (16).

8. The anti-cross-liquid structure of the three-chamber drainage bottle according to claim 7, characterized in that, Both the first pipe fitting (15) and the second pipe fitting (16) are pagoda-type pipe fittings.

9. The anti-cross-liquid structure of the three-chamber drainage bottle according to claim 1, characterized in that, The first control switch (3) is a hydraulic valve, which is installed in series between the suction pipe (2) and the collection port (12).

10. A closed chest drainage device, characterized in that, Includes a three-chamber drainage bottle and a three-chamber drainage bottle anti-cross-flow structure as described in any one of claims 1-9; The three-chamber drainage bottle includes a liquid collection bottle (01), a water seal bottle (02), and a pressure regulating bottle (03) arranged in sequence. The sealed shell (1) of the anti-cross-flow structure of the three-chamber drainage bottle is set above the three-chamber drainage bottle. The second control switch (5) of the anti-cross-flow structure of the three-chamber drainage bottle is connected to the suction port (031) of the pressure regulating bottle (03). The suction tube (2) of the anti-cross-flow structure of the three-chamber drainage bottle is sealed and installed in the liquid filling port (021) of the water seal bottle (02) through the installation structure. One end is connected to the liquid collection port (12) of the anti-cross-flow structure of the three-chamber drainage bottle, and the other end extends into the interior of the water seal bottle (02), and the end is flush with the 0 water level line inside the water seal bottle (02).

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