Negative pressure drainage monitoring system

Abstract

The present invention discloses a negative pressure drainage monitoring system, including a control body, a collection container, a drainage tube and a separator, wherein the control body is detachably connected to the collection container, one end of the drainage tube is connected to the collection container, and the other end is connected to the separator; the control body is respectively provided with a negative pressure measurement and control system and a drainage and flushing system; the negative pressure measurement and control system is used to detect and control the negative pressure in the patient's chest cavity or wound surface, and the drainage and flushing system is used to flush the drainage cavity. This device can not only monitor the negative pressure of the patient's chest cavity or wound surface in real time, provide medical staff with accurate data on the patient's recovery status, but also flush the drainage cavity to avoid blockage of the drainage cavity.

Description

Technical Field

[0001] The present invention relates to the field of medical equipment, and more particularly to a negative pressure drainage monitoring system. Background Art

[0002] Closed chest drainage or wound drainage is a common clinical operation in thoracic surgery and an effective method for treating empyema, traumatic hemothorax, pneumothorax, and spontaneous pneumothorax. At present, domestic pleural effusion drainage devices are mainly divided into drainage bag drainage, water seal bottle drainage, water seal bottle negative pressure drainage, etc. According to the patient's condition, the drainage method is also divided into intercostal thin tube intubation, intercostal thick tube intubation, and transcostal bed intubation. These methods mainly use the traditional manual syringe extraction method. However, the existing drainage devices and drainage methods have disadvantages, as follows:

[0003] 1. During drainage bag drainage and water seal bottle drainage, the patient's chest negative pressure cannot be regulated, which is not conducive to the patient's recovery.

[0004] 2. The existing pleural effusion drain cannot monitor the negative pressure of the patient's chest in real time, and therefore cannot provide medical staff with quantitative data on the patient's recovery status, making it more difficult for medical staff to make judgments.

[0005] 3. The existing pleural effusion drain cannot quantitatively monitor the air leakage in the patient's chest in real time, so it cannot provide medical staff with real-time information about the patient's chest condition, which may miss the best time for treatment.

[0006] 4. The existing pleural effusion drain cannot quantitatively monitor the drainage of the patient's pleural effusion in real time, and thus cannot scientifically evaluate the timing of the patient's tube removal, resulting in an increase in the patient's treatment cycle.

[0007] 5. The existing pleural effusion drainage tube is easily blocked by pus and blood clots drained from the chest cavity, so that the continuous drainage effect cannot be achieved. At this time, medical staff need to manually clear the tube, which brings great inconvenience to medical staff.

[0008] 6. Existing wound drainage equipment cannot achieve accurate and rapid control of negative pressure, and cannot control the negative pressure of the wound using trapezoidal wave or sine wave negative pressure control methods, which increases the patient's treatment and recovery cycle. Summary of the invention

[0009] In view of the deficiencies in the prior art, the object of the present invention is to provide a negative pressure drainage monitoring system which can solve the above-mentioned technical problems.

[0010] The above technical objectives of the present invention are achieved through the following technical solutions: a negative pressure drainage monitoring system, comprising a control body, a collection container, a drainage tube and a separator, wherein the control body is detachably connected to the collection container, one end of the drainage tube is connected to the collection container, and the other end is connected to the separator;

[0011] The control body is respectively provided with an air circuit pressure measuring system and a drainage and flushing system;

[0012] The collection container comprises a container body, a collection cavity is arranged in the container body, a collection hole and a vent are arranged in the collection cavity, a collection interface is arranged on the outside of the container body and is respectively connected with the collection hole and the vent, an auxiliary interface connected with the drainage and flushing system and a drainage interface connected with the negative pressure measurement and control system are respectively arranged on the end surface of the container body, the auxiliary interface is connected with the vent, and the drainage interface is connected with the collection cavity;

[0013] The drainage tube comprises a drainage cavity and a ventilation cavity, the drainage cavity is communicated with the collection hole, and the ventilation cavity is communicated with the ventilation hole;

[0014] The separator includes an upper cover, a lower cover and an isolation membrane. The upper cover is buckled with the lower cover and the two are combined to form an isolation chamber. The lower cover is integrally provided with a drainage pipe. A plug for sealing the gas and a through hole connected to the isolation chamber are provided inside one end of the drainage pipe. The isolation membrane is located in the isolation chamber and is fitted with the inner wall of the lower cover. The lower cover is provided with an interface connecting the drainage pipe and the isolation chamber. A one-way closure that can be opened or closed is provided on the isolation membrane. The one-way closure is located in the interface. When the air pressure value of the isolation chamber is higher than the air pressure value of the drainage pipe, the one-way closure is opened to connect the isolation chamber and the drainage pipe.

[0015] The main purpose of this device is to regulate the patient's chest negative pressure, and at the same time, it can accurately monitor the patient's chest negative pressure in real time; therefore, the traditional single-chamber drainage tube is set to a double-chamber, the drainage chamber is used to drain secretions, and the ventilation chamber is used for flushing and pressure measurement. One end of the drainage pipe of the separator is connected to the drainage tube, and the other end can be provided with a connector or multiple connectors.

[0016] Principle: A drainage connecting tube is inserted into the patient's chest cavity or wound surface. Liquid secretions flow through the drainage connecting tube through the separator to the drainage cavity of the drainage tube, and then the liquid secretions enter the collection container from the drainage cavity. If the drainage cavity is blocked by pus or blood clots during the drainage process, the solenoid valve opens, and external gas enters, passing through the solenoid valve, the distal three-way connector, the ventilation cavity of the drainage tube, and the isolation cavity of the separator in turn. When the air pressure value of the isolation cavity is greater than the air pressure value of the drainage channel, the one-way sealer opens, and the gas enters the drainage cavity, and finally the flushing of the drainage tube is completed.

[0017] It is further defined that the drainage and flushing system includes a pressure measuring and flushing interface opened on the end of the control body, the pressure measuring and flushing interface is connected to a remote three-way connector, one end of the remote three-way connector is connected to a solenoid valve, and the other end is connected to a remote pressure sensor for detecting the separator air pressure value.

[0018] It is further defined that the negative pressure measurement and control system includes a negative pressure control and drainage interface opened on the end of the control body, the negative pressure control and drainage interface is connected to a proximal three-way joint, one end of the proximal three-way joint is connected to a proximal pressure sensor, and the other end is connected in sequence to a one-way valve and a vacuum pump.

[0019] The distal pressure sensor detects the air pressure in the isolation chamber of the separator to monitor the negative pressure of the patient's chest in real time. If the air pressure in the collection container changes, the vacuum pump needs to be turned on to adjust it. In addition, the air pressure value detected by the proximal pressure sensor is P1, and the air pressure value detected by the distal pressure sensor is P2. If the pressure difference between P1 and P2 is greater than the pressure resistance in the drainage chamber, the drainage chamber is blocked. The battery valve needs to be opened to flush the drainage tube.

[0020] It is further defined that a partition is provided in the upper area of ​​the collecting chamber to prevent the liquid in the collecting chamber from gushing out from the bottom to the top due to external force, and the partition extends downward from its connecting end along the lateral inclination of the container body, and a blocking plate is vertically extended downward from the free end of the partition, and there is a distance between the blocking plate and the inner wall of the container body.

[0021] It is further defined that a vertical plate is located in the central area of ​​the collection chamber and extends vertically downward from the bottom of the partition, with a certain distance between the vertical plate and the bottom of the container body. The vertical plate extends along the longitudinal direction of the container body and has an opening on the vertical plate along its vertical direction.

[0022] It is further defined that the isolation membrane includes a circular isolation sheet and a long strip-shaped connecting sheet, the connecting sheet is provided with a through opening communicating with the through hole, and a sealing portion is provided on the outer side of the through opening.

[0023] It is further defined that the lower cover includes a circular cover plate and an elongated connecting portion, the cover plate is provided with an upwardly protruding sealing ring, and the connecting portion is provided with an airway communicating with the isolation cavity.

[0024] It is further defined that a pressure relief valve is provided on the container body, and filters are provided inside the pressure relief valve and the auxiliary interface.

[0025] It is further defined that reinforcing ribs are respectively arranged on the inner bottom wall of the container body and on both sides of the vertical plate, and the reinforcing ribs extend upwardly beyond the distance between the vertical plate and the inner bottom wall of the container body.

[0026] It is further defined that the drainage conduit is provided with a sampling port for collecting liquid secretions.

[0027] In summary, the present invention has the following beneficial effects:

[0028] 1. This device can regulate the patient's chest negative pressure, which is beneficial to the patient's recovery.

[0029] 2. This device can monitor the negative pressure of the patient's chest in real time, provide medical staff with accurate data on the patient's recovery, and assist medical staff in their treatment plans.

[0030] 3. This device can monitor in real time whether there is air leakage in the patient's chest cavity, provide medical staff with real-time monitoring of the negative pressure in the patient's chest cavity, and provide better assistance for patient treatment.

[0031] 4. This device can quantitatively monitor the drainage of pleural effusion in real time, scientifically evaluate the timing of extubation and shorten the treatment cycle.

[0032] 5. This device can detect whether the drainage tube is blocked and flush the drainage tube in time without the need for medical staff to manually clear the tube.

[0033] 6. This equipment can accurately and quickly control the negative pressure. It uses the combination of solenoid valve and pressure sensor to control the negative pressure on the wound surface using trapezoidal wave or sine wave negative pressure control method, so as to treat patients more scientifically and speed up their recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Schematic diagram of the overall structure of this embodiment;

[0035] Figure 2 This is a schematic diagram of the structure of the control body of this embodiment;

[0036] Figure 3 This is a schematic diagram of the connection structure of the collecting container, drainage tube, and separator in this embodiment;

[0037] Figure 4 Schematic diagram of the structure of the left container body of this embodiment;

[0038] Figure 5 This is a schematic structural diagram of the right cover body of this embodiment;

[0039] Figure 6 Schematic diagram of the structure of the drainage tube in this embodiment;

[0040] Figure 7 Schematic diagram of the structure of the separator of this embodiment;

[0041] Figure 8 It is a schematic diagram of the left side structure of the separator of this embodiment;

[0042] Fig. 9 This is a schematic diagram of the structure of the separator upper cover of this embodiment;

[0043] Fig.10 Schematic diagram of the structure of the isolation membrane of this embodiment;

[0044] Fig.11 This is a schematic structural diagram of the lower cover of the separator in this embodiment;

[0045] Fig.12 This is a schematic diagram of gas flow for flushing the drainage cavity in this embodiment;

[0046] Fig.13 It is a partial enlarged structural schematic diagram of the left container body of this embodiment;

[0047] Fig.14 This is a schematic diagram of the connection structure of the internal components of the control body of this embodiment;

[0048] Fig.15 This is a schematic diagram of the connection structure between the lower cover and the isolation membrane of this embodiment;

[0049] Description of the drawings: 1. Control body; 2. Collection container; 3. Drainage tube; 4. Separator; 21. Container body; 211. Left container body; 212. Right cover body; 22. Collection interface; 23. Drainage interface; 24. Auxiliary interface; 25. Collection chamber; 251. Collection hole; 252. Vent hole; 253. Plug; 26. Partition; 27. Blocking plate; 28. Guide plate; 29. ​​Reinforcement rib; 254. Vertical plate; 5. Filter; 6. Pressure relief valve; 31. Drainage cavity; 32. Ventilation cavity; 41. Lower cover; 42. Upper cover; 43. Isolation membrane; 411. Cover body; 412. Joint; 413. Drainage duct; 414. Buckle groove; 421. Cover plate; 422. Connecting part; 423. Buckle edge; 424. Isolation cavity; 425. Sealing ring; 426. Airway; 44. Through hole; 45. Sealing block; 46. Card slot; 47. Interface; 48. One-way closure; 49. Sampling port; 431. Isolation plate; 432. Connecting plate; 433. Through port; 434. Sealing part; 11. Pressure measurement and flushing interface; 12. Left three-way connector; 13. Solenoid valve; 14. Distal pressure sensor; 15. Negative pressure control and drainage interface; 16. Proximal three-way connector; 17. Proximal pressure sensor; 18. One-way valve; 19. Vacuum pump. DETAILED DESCRIPTION

[0050] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0051] refer to Figure 1A negative pressure drainage monitoring system includes a control body 1, a collection container 2, a drainage tube 3 and a separator 4. A connection structure is provided on the end surface where the control body 1 and the collection container 2 are connected, and the two are detachably connected. One end of the drainage tube 3 is connected to the collection container 2, and the other end is connected to the separator 4. Figure 6 The drainage tube 3 has two chambers, namely a drainage chamber 31 and a ventilation chamber 32.

[0052] refer to Figure 3-Figure 5 The collection container 2 includes a container body 21, which is divided into a left container body 211 and a right cover body 212, which are detachably connected. A collection interface 22 is provided on the top of the left container body 211, and the collection interface 22 is used to connect the drainage tube 3. A drainage interface 23 and an auxiliary interface 24 are respectively provided on the right cover body 212. In order to filter bacteria, filters 5 are respectively installed on the drainage interface 23 and the auxiliary interface 24; the filter 5 can not only filter bacteria but also seal when it encounters water, playing a blocking role.

[0053] See Figure 4 The container body 21 has a collection chamber 25. The collection chamber 25 is provided with a collection hole 251 and a vent hole 252, and the vent hole 252 is located above the collection hole 251. The collection interface 22 is connected to the collection hole 251 and the vent hole 252 respectively; Fig.13 A plug 253 is also provided in the collection interface 22 for closing the chamber at the upper end of the drainage tube 3. During ventilation, in order to filter bacteria, a filter 5 is provided in the vent hole 252. The drainage cavity 31 is connected to the collection hole 251, and the ventilation cavity 32 is connected to the vent hole 252.

[0054] refer to Figure 4 , a partition 26 is provided in the upper area of ​​the collection chamber 25 to prevent the liquid in the collection chamber 25 from gushing out from the bottom to the top under the influence of external force. The partition 26 extends downwardly from its connecting end along the transverse inclination of the container body 21, and a blocking plate 27 extends vertically downward from the free end of the partition 26, and there is a gap between the blocking plate 27 and the inner side wall of the container body 21. A guide plate 28 is provided below the collection hole 251 to guide the liquid to flow out downward. The guide plate 28 not only guides the liquid but also prevents the liquid from flowing back. A certain distance is left between the vertical plate 254 and the bottom of the container body 21, and the vertical plate 254 extends in the longitudinal direction of the container body 21 and has an opening in the vertical direction thereof. The collection chamber 25 is divided into two chambers by the vertical plate 254. The opening is to open up the entire collection chamber 25; to prevent the secretion from filling up half of the chamber of the collection chamber 25, and the gas is not easy to be discharged from the inside.

[0055] Reinforcement ribs 29 are provided on the inner bottom wall of the container body 21 and on both sides of the vertical plate 254. The reinforcement ribs 29 extend upwardly beyond the distance between the vertical plate 254 and the inner bottom wall of the container body 21. The partition 26, the vertical plate 254 and the reinforcement ribs 29 form a labyrinth structure inside the container body 21 to prevent the internal liquid from gushing out.

[0056] The container body 21 is provided with a pressure relief valve 6. When the air pressure inside the container body 21 reaches a certain pressure value, the pressure relief valve 6 opens to release the pressure. A filter 5 is provided inside the pressure relief valve 6.

[0057] See Figure 7-Figure 15 The separator 4 includes an upper cover 42, a lower cover 41 and an isolation membrane 43. Fig. 9 The lower cover 41 has a circular cover body 411 and a long strip-shaped joint portion 412; a tubular drainage pipe 413 is provided on the lower cover 41, and the lower cover 41 and the drainage pipe 413 are integrally made by a mold. Three buckle grooves 414 are provided on the circumferential surface of the cover body 411 at equal intervals.

[0058] See Figure 6 One end of the drainage tube 3 is connected to the collection interface 22 of the collection container 2, and the other end is connected to the drainage pipe 413 of the separator 4. The other end of the drainage pipe 413 of the separator 4 can be provided with one or more joints; each joint is connected to the drainage tube 3 connected to the human chest cavity.

[0059] See Fig.11 The upper cover 42 has a circular cover sheet 421 and a long strip connecting portion 422; the outer edge of the cover sheet 421 has a ring-shaped buckle edge 423. The cover sheet 421 is provided with an upwardly protruding sealing ring 425, and the connecting portion 422 is provided with an air passage 426 connected to the isolation chamber 424. The upper cover 42 and the lower cover 41 are connected through the buckle groove 414 and the buckle edge 423, and the two are combined to form an isolation chamber 424. The isolation membrane 43 is located in the isolation chamber 424 and is arranged in contact with the inner wall of the lower cover 41.

[0060] See Figure 8 The drainage pipe 413 has a plug for blocking gas at one end and a through hole 44 in communication with the isolation chamber 424 at the lower end. The drainage pipe 3 is connected to the drainage pipe 413, the drainage chamber 31 is in communication with the inner channel of the drainage pipe 413, and the plug 253 blocks the ventilation chamber 32, so that the gas in the ventilation chamber 32 flows into the isolation chamber 424 through the through hole 44. Fig. 9 A sealing block 45 is provided on the joint portion 412 of the lower cover 41 and on one side of the through hole 44; a card slot 46 is provided at the outer end of the joint portion 412. A sampling port 49 is provided on the drainage pipe 413 for facilitating sampling.

[0061] The lower cover 41 is provided with an interface 47 for connecting the drainage pipe 413 with the isolation chamber 424. The isolation membrane 43 is provided with a one-way closure 48 that can be opened or closed. The one-way closure 48 is located in the interface 47. When the air pressure value of the isolation chamber 424 is higher than the air pressure value of the drainage pipe 413, the one-way closure 48 opens to connect the isolation chamber 424 with the drainage pipe 413.

[0062] See Fig.10 , the isolation membrane 43 is made of elastic non-metallic material. The isolation membrane 43 includes a circular isolation sheet 431 and a long strip-shaped connecting sheet 432. The connecting sheet 432 is provided with a through opening 433 connected to the through hole 44, and a sealing portion 434 is provided on the outside of the through opening 433. The cross-sectional shape of the sealing portion 434 is a "convex" shape. The outer end of the isolation membrane 43 is stuck in the card groove 46, and the sealing portion 434 of the isolation membrane 43 is buckled on the sealing block 45 of the joint 412. The lower cover 41 is buckled with the upper cover 42, and pressure is applied to the sealing portion 434 of the isolation membrane 43. Because the sealing portion 434 is in a "convex" shape, a better sealing effect is achieved.

[0063] The one-way closure 48 is two plastic springs arranged opposite to each other. When ventilation is in progress, the two plastic springs are opened by air pressure, and when ventilation is stopped, the two plastic springs return to the closed state. When opening or closing, the isolation sheet 431 will be deformed by air pressure; in order to improve the deformation capacity of the isolation sheet 431, the isolation sheet 431 is designed to be a convex surface that bulges upward and has an arc. A cross groove is provided on the inner wall of the lower cover 41 and at the interface.

[0064] See Figure 2 The control body 1 is provided with a negative pressure measurement and control system and a drainage and flushing system; see Fig.14 The drainage and flushing system includes a pressure measuring and flushing interface 11 opened on the end of the control body 1, the pressure measuring and flushing interface 11 is connected to a remote three-way connector 12, one end of the remote three-way connector 12 is connected to a solenoid valve 13, and the other end is connected to a remote pressure sensor 14 for detecting the air pressure value of the separator 4.

[0065] The negative pressure measurement and control system includes a negative pressure control and drainage interface 15 opened at the end of the control body 1, and the negative pressure control and drainage interface 15 is connected to a proximal three-way connector 16. One end of the proximal three-way connector 16 is connected to a proximal pressure sensor 17, and the other end is connected in sequence to a one-way valve 18 and a vacuum pump 19.

[0066] See Figure 2 and Figure 5, the control body 1 is connected to the collection container 2, the negative pressure control and drainage interface 15 is connected to the drainage interface 23, and the pressure measurement and flushing interface 11 is connected to the auxiliary interface 24. The distal pressure sensor 14 detects the air pressure of the isolation chamber 424 of the separator 4 to monitor the negative pressure of the patient's chest cavity in real time. If the air pressure value in the isolation chamber 424 does not reach the set value, the vacuum pump 19 starts to evacuate. In addition, the air pressure value detected by the proximal pressure sensor 17 is P1, and the air pressure value detected by the distal pressure sensor 14 is P2. If the pressure difference between P1 and P2 is greater than the pressure resistance in the drainage chamber 31, the drainage chamber 31 is blocked. The solenoid valve 13 is opened, and the outside atmosphere passes through the solenoid valve 13, the distal three-way connector 12, the ventilation chamber 32, the isolation chamber 424 of the separator 4 and the drainage chamber 31 in turn, and finally completes the flushing of the drainage tube 3.

[0067] Principle: A drainage connecting tube is inserted into the chest cavity or wound of the patient, and the liquid secretions flow through the drainage connecting tube through the separator 4 to the drainage cavity 31 of the drainage tube 3, and the liquid secretions then enter the collection container 2 from the drainage cavity 31; if during the drainage process, the drainage cavity 31 is blocked by pus or blood clots, the solenoid valve 13 is opened, and external gas enters, passing through the solenoid valve 13, the distal three-way connector 12, and the isolation cavity 424 of the separator 4 in turn. When the air pressure value of the isolation cavity 424 is greater than the air pressure value of the drainage channel, the one-way closure 18 is opened, and the gas enters the drainage cavity 31, and finally the flushing of the drainage tube 3 is completed.

[0068] The specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, such modifications are protected by the patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A negative pressure drainage monitoring system, comprising a control body (1), a collection container (2), a drainage tube (3) and a separator (4), wherein the control body (1) is detachably connected to the collection container (2), one end of the drainage tube (3) is connected to the collection container (2), and the other end is connected to the separator (4); characterized in that: The control body (1) is provided with a negative pressure measurement and control system and a drainage and flushing system respectively; The collecting container (2) comprises a container body (21), a collecting chamber (25) is arranged in the container body (21), a collecting hole (251) and a vent hole (252) are arranged in the collecting chamber (25), a collecting interface (22) which is respectively connected to the collecting hole (251) and the vent hole (252) is arranged outside the container body (21), an auxiliary interface (24) which is connected to a drainage and flushing system and a drainage interface (23) which is connected to a negative pressure measurement and control system are respectively arranged on the end surface of the container body (21), the auxiliary interface (24) is connected to the vent hole (252), and the drainage interface (23) is connected to the collecting chamber (25); The drainage tube (3) comprises a drainage cavity (31) and a ventilation cavity (32); the drainage cavity (31) is in communication with the collection hole (251), and the ventilation cavity (32) is in communication with the ventilation hole (252); The separator (4) comprises a lower cover (41), an upper cover (42) and an isolation membrane (43); the lower cover (41) and the upper cover (42) are buckled and combined to form an isolation chamber (424); a drainage pipe (413) is integrally provided on the lower cover (41); a plug (253) for sealing gas and a through hole (44) communicating with the isolation chamber (424) are provided inside one end of the drainage pipe (413); the isolation membrane (43) is located in the isolation chamber (424) and is connected to the isolation chamber (424). The inner wall of the lower cover (41) is fitted, and the lower cover (41) is provided with an interface (47) for connecting the drainage duct (413) and the isolation chamber (424). The isolation membrane (43) is provided with a one-way closure (48) that can be opened or closed. The one-way closure (48) is located in the interface (47). When the air pressure value of the isolation chamber (424) is higher than the air pressure value of the drainage duct (413), the one-way closure (48) is opened to connect the isolation chamber (424) and the drainage duct (413); The drainage and flushing system comprises a pressure measuring and flushing interface (11) provided at the end of the control body (1), the pressure measuring and flushing interface (11) being connected to a distal three-way connector (12), one end of the distal three-way connector (12) being connected to a solenoid valve (13), and the other end being connected to a distal pressure sensor (14) for detecting the air pressure value of the separator (4); The negative pressure measurement and control system comprises a negative pressure control and drainage interface (15) provided at the end of a control body (1), the negative pressure control and drainage interface (15) being connected to a proximal three-way connector (16), one end of the proximal three-way connector (16) being connected to a proximal pressure sensor (17), and the other end being connected in sequence to a one-way valve (18) and a vacuum pump (19).

2. The negative pressure drainage monitoring system according to claim 1, characterized in that: A partition (26) is provided in the upper area of ​​the collecting chamber (25) to prevent the liquid in the collecting chamber (25) from gushing out from the bottom to the top due to external force. The partition (26) extends downwardly from its connecting end along the transverse direction of the container body (21). A blocking plate (27) extends vertically downward from the free end of the partition (26). There is a distance between the blocking plate (27) and the inner side wall of the container body (21).

3. The negative pressure drainage monitoring system according to claim 2, characterized in that: A vertical plate (254) is located in the central area of ​​the collecting chamber (25) and extends vertically downward from the bottom of the partition (26). A certain distance is left between the vertical plate (254) and the bottom of the container body (21). The vertical plate (254) extends in the longitudinal direction of the container body (21) and an opening is opened on the vertical plate (254) along its vertical direction.

4. The negative pressure drainage monitoring system according to claim 1, characterized in that: The isolation membrane (43) comprises a circular isolation sheet (431) and a long strip-shaped connecting sheet (432); a through opening (433) communicating with the through hole (44) is provided on the connecting sheet (432), and a sealing portion (434) is provided on the outer side of the through opening (433).

5. The negative pressure drainage monitoring system according to claim 1, characterized in that: The upper cover (42) comprises a circular cover sheet (421) and a long strip-shaped connecting portion (422); the cover sheet (421) is provided with an upwardly protruding sealing ring (425); and the connecting portion (422) is provided with an airway (426) communicating with the isolation chamber (424).

6. The negative pressure drainage monitoring system according to claim 1, characterized in that: The container body (21) is provided with a pressure relief valve (6), and filters (5) are provided inside the pressure relief valve (6) and the drainage interface (23).

7. The negative pressure drainage monitoring system according to claim 6, characterized in that: Reinforcing ribs (29) are respectively arranged on the inner bottom wall of the container body (21) and on both sides of the vertical plate (254), and the reinforcing ribs (29) extend upwards and exceed the distance between the vertical plate (254) and the inner bottom wall of the container body (21).

8. The negative pressure drainage monitoring system according to claim 1, characterized in that: The drainage pipe (413) is provided with a sampling port (49) for collecting liquid secretions.

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