Small intelligent negative pressure vacuum suction device, suction system and suction method

Through small intelligent negative pressure vacuum suction devices and suction systems, the problem that large devices are not suitable for home use is solved, and the negative pressure suction that patients can carry is achieved, which promotes incision healing, reduces costs and antibiotic use, and improves freedom of movement.

CN120361316APending Publication Date: 2025-07-25THE AFFILIATED HOSPITAL OF GUIZHOU MEDICAL UNIV
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Patent Information

Application Number
CN202410065756.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-01-16
Publication Date
2025-07-25

AI Technical Summary

Technical Problem

The existing large negative pressure suction device is not suitable for home use or carried by patients on their own, resulting in long hospitalization time and high cost, and it is difficult to effectively keep the incision dry, affecting healing.

Method used

A small intelligent negative pressure vacuum suction device is designed, including a micro vacuum pump, intelligent control module, power supply module and motor. The working state is adjusted through the intelligent control module to avoid direct contact with the affected area, and is small in size and can be carried. Combined with polymer foam dressings and waste liquid collection device, it can achieve sufficient drainage and maintain dryness.

Benefits of technology

It realizes the negative pressure attraction that patients can carry with them, reduces treatment costs, promotes incision healing, reduces antibiotic use, shortens healing time, and improves the freedom of patients to move.

✦ Generated by Eureka AI based on patent content.

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    Figure CN120361316A_ABST
Patent Text Reader

Abstract

The small intelligent negative pressure vacuum suction device comprises a shell, a micro vacuum pump, an intelligent control module, a flow adjusting module, a power module and a motor are arranged in the shell, a display screen is arranged on the shell, a connecting port is formed in one side of the shell, and the motor is used for driving the micro vacuum pump to work. The miniature vacuum pump is provided with an air suction port and an exhaust port, the air suction port is communicated with the outside of the shell through a connecting port, an adjusting valve is arranged on the outer side of the shell and connected with an intelligent control module in the shell, and the intelligent control module comprises a flow control module, a pressure intensity control module and a timing module. The miniature vacuum pump, the flow adjusting module and the motor are all connected with the intelligent control module, and the intelligent control module and the display screen are both electrically connected with the power module. According to the device, the working state can be adjusted according to actual requirements, the device is small in size and convenient to use, sufficient drainage can be conducted on an incision affected part, dryness is kept, and incision healing is promoted.
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Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly relates to a small intelligent negative pressure vacuum suction device, a suction system and a suction method. Background Art

[0002] With the continuous development and progress of surgical techniques, in order to avoid the biological recurrence after malignant tumor surgery, tumor surgery emphasizes the resection of superficial lymph nodes. Due to the destruction of superficial lymph nodes, the lymphatic vessels will inevitably be severed, resulting in the leakage of lymph fluid. Since the lymph fluid soaks the incision tissue, the incision cannot be kept dry and clean, and ultimately bacteria will breed in the incision, seriously affecting the incision healing. The existing treatments for this problem mainly include repeated dressing changes every day, long-term oral antibiotics, or extended hospitalization time to achieve the purpose of treating the incision. However, no matter which of the above treatment plans is adopted, it will lead to a long hospitalization time for the patient and an increase in the postoperative treatment cost of the patient. It will not only seriously affect the psychological state of the postoperative patient and his family, but even lead to tension in the doctor-patient relationship and induce doctor-patient contradictions.

[0003] In order to solve the above problems, in surgery, there is a treatment principle of "keeping dry, fully draining, and promoting incision healing". At present, the treatment methods for incision drainage mainly use a suction pump to drain lymph fluid or tissue exudate to keep the incision dry, so that the chance of bacterial growth can be reduced and the incision healing of the patient can be promoted without the abuse of antibiotics.

[0004] Currently, the instruments mainly used to maintain incision vacuum aspiration can be divided into two categories: the central negative pressure suction system provided by the vacuum interface in the hospital ward and the vacuum negative pressure sputum aspirator. Both of them are huge in volume. Especially for the central negative pressure suction system, this system is not a medical condition that can be provided by ordinary families or even primary hospitals. And the vacuum negative pressure sputum aspirator is not suitable for home use or self-carriage by patients because of its huge volume, heavy weight, inability to be used without power, and extremely loud noise. Therefore, it is necessary to provide a miniaturized intelligent negative pressure vacuum suction pump to solve the above problems. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a small intelligent negative pressure vacuum suction device, a suction system and a suction method. Among them, the suction device can adjust the working state according to actual needs, is convenient to use, enables the patient to avoid direct contact with the affected area during use, can be reused, has a small volume, can be carried around, and can also reduce the cost of using this treatment method; the suction system and method are conducive to fully draining the affected area of the incision, keeping it dry, and promoting incision healing.

[0006] The technical solution of the present invention is realized as follows:

[0007] The first aspect of the present invention discloses a small intelligent negative pressure vacuum suction device, which includes a housing. A micro vacuum pump, an intelligent control module, a flow rate adjustment module, a power supply module and a motor are provided inside the housing. A display screen is provided on the housing. A connection port is provided on one side of the housing. The motor is used to drive the micro vacuum pump to work. An air inlet and an air outlet are provided on the micro vacuum pump. The air inlet communicates with the outside of the housing through the connection port. A regulating valve is provided on the outside of the housing. The regulating valve is connected to the intelligent control module inside the housing. The intelligent control module includes a flow rate control module, a pressure control module and a timing module. The micro vacuum pump, the flow rate adjustment module and the motor are all connected to the intelligent control module. The intelligent control module and the display screen are both electrically connected to the power supply module.

[0008] Preferably, a charging port and a safety switch are provided on the housing. The safety switch is electrically connected to the intelligent control module.

[0009] Preferably, a plurality of exhaust holes are provided on the housing. The exhaust holes communicate the air outlet and the outside of the housing.

[0010] Preferably, a temperature sensor and a humidity sensor are further provided inside the housing. The temperature sensor and the humidity sensor are respectively connected to the intelligent control module.

[0011] Preferably, a connecting member is further provided on the outside of the housing. The connecting member is any one or several of a magnetic attraction member, a magic tape, a binding band, and a hook.

[0012] The second aspect of the present invention discloses an attraction system, which is characterized by including a high molecular foam dressing, an anti-backflow drainage tube, a small intelligent negative pressure vacuum suction device as described above, and a waste liquid collection device. The high molecular foam dressing is arranged on the surface of the affected area. One side of the anti-backflow drainage tube is connected to the high molecular foam dressing, and the other side is connected to the waste liquid collection device. The waste liquid collection device is connected to the small intelligent negative pressure vacuum suction device.

[0013] Preferably, the waste liquid collection device includes a drainage bottle and a second pipeline. The second pipeline is connected to the small intelligent negative pressure vacuum suction device.

[0014] The third aspect of the present invention discloses an attraction method, which includes the following steps:

[0015] S1: Lay the high molecular foam dressing on the surface of the affected area; set one end of the anti-backflow drainage tube on the high molecular foam dressing;

[0016] S2: Connect the other end of the anti-backflow drainage tube to the waste liquid collection device;

[0017] S3: Connect the waste liquid collection device to the suction port of the small intelligent negative pressure vacuum suction device;

[0018] S4: Start the small intelligent negative pressure vacuum suction device. According to the actual situation of the affected area, adjust its working mode through the regulating valve on the shell of the small intelligent negative pressure vacuum suction device. The working mode includes working time, working frequency, and suction flow rate.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] When using the present invention, start the suction device, so that the intelligent control module sends an instruction to the motor, and then drives the micro intelligent pump to start working. Since the suction port of the micro intelligent pump is connected to the connection port, therefore, medical devices such as a suction tube and a filter can be connected through this connection port, and then waste liquids such as tissue fluid or lymph fluid on the affected area can be suctioned. This method can avoid the direct contact between this suction device and the affected area and can be reused. Moreover, the power module has the function of being rechargeable and dischargeable repeatedly. When in use, it is not necessary to plug in the power supply. That is, this device is easy to carry, so that the patient's range of activities is not restricted when using it; the present invention can also adjust the working pressure, flow rate, and working time of the micro vacuum pump through the intelligent control module, and adjust the working state of this suction device through the regulating valve, preventing the insufficient suction time from resulting in the incomplete cleaning of waste liquids such as tissue fluid or lymph fluid, and also preventing the excessive suction of the affected area due to the too long suction time, which may cause other injuries. This suction device can be used repeatedly for a long time, and its connection safety allows different patients to use it alternately without worrying about whether it is a disposable medical device. Most importantly, the negative pressure suction pump used in this suction device is a micro vacuum pump, and the power module is a small battery. One charge can be used for 4 - 6 hours. Therefore, the volume of this suction device is small, easy to use, and can flexibly adjust the regulating valve according to the specific situation when the patient is using it, so as to adjust the use power of the micro vacuum pump, enabling the patient to carry it with him when using it and also reducing the cost of using this treatment method;

[0021] And using the suction method of the present invention is beneficial to fully drain the incision affected area and keep it dry to promote the healing of the incision. For patients or their families who use it for the first time and have no experience, they can switch to the adjusted intelligent mode to start the work of the vacuum pump, while patients or their families with sufficient experience can manually adjust the power of the pump according to their own specific conditions. Using this suction method can keep the incision dry and clean for a long time, minimizing the conditions for bacteria growth as much as possible. It can not only reduce the use of antibiotics but also promote the healing of the incision. The healed incision can shorten the repair time of the lymphatic vessels and the growth and healing time of the incision, which has great benefits. Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 The perspective view of the suction device disclosed in the first aspect of the present invention;

[0024] Figure 2 The top view of the suction device disclosed in the first aspect of the present invention;

[0025] Figure 3 The structural schematic diagram of the suction system disclosed in the second aspect of the present invention;

[0026] Figure 4 The flowchart of the suction method disclosed in the third aspect of the present invention.

[0027] Reference numerals: 1 - housing, 2 - micro vacuum pump, 3 - intelligent control module, 4 - flow rate adjustment module, 5 - power supply module, 6 - motor, 7 - display screen, 8 - connection port, 9 - suction port, 10 - exhaust port, 11 - regulating valve, 12 - flow control module, 13 - pressure control module, 14 - timing module, 15 - charging port, 16 - safety switch, 17 - exhaust hole, 18 - temperature sensor, 19 - humidity sensor, 20 - connecting piece, 21 - polymer foam dressing, 22 - anti - backflow suction tube, 23 - drainage bottle, 24 - second pipeline, 25 - affected area. Detailed implementation manners

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", "fourth", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] See Figures 1 to 2 , an embodiment of the present invention discloses a small intelligent negative pressure vacuum suction device according to the first aspect of the present invention, which includes a housing 1. A micro vacuum pump 2, an intelligent control module 3, a flow rate adjustment module 4, a power supply module 5, and a motor 6 are provided inside the housing 1. A display screen 7 is provided on the housing 1. A connection port 8 is provided on one side of the housing 1. The motor 6 is used to drive the micro vacuum pump 2 to work. An air suction port 9 and an air exhaust port 10 are provided on the micro vacuum pump 2. The air suction port 9 communicates with the outside of the housing 1 through the connection port 8. A regulating valve 11 is provided on the outside of the housing 1. The regulating valve 11 is connected to the intelligent control module 3 inside the housing 1. The intelligent control module 3 includes a flow rate control module 12, a pressure control module 13, and a timing module 14. The micro vacuum pump 2, the flow rate adjustment module 4, and the motor 6 are all connected to the intelligent control module 3. The intelligent control module 3 and the display screen 7 are both electrically connected to the power supply module 5.

[0032] Specifically, the micro vacuum pump 2 can be any one of an adsorption pump, a centrifugal pump, a vibration pump, and a membrane pump. The display screen 7 can be any one of a liquid crystal display screen 7, a digital display screen 7, or a digital code display screen 7, and is used to display the working state of the suction device, such as the flow rate value, the pressure value, and the timing time. The power supply module 5 is a lithium battery, which is used to supply power to the parts that need electricity in the suction device, and can be repeatedly charged, and the length of the wire does not affect its use when in use.

[0033] During use, start this suction device, so that the intelligent control module 3 sends instructions to the motor 6, and then drives the micro intelligent pump to start working. Since the suction port 9 of the micro intelligent pump is connected to the connection port 8, medical devices such as a suction tube and a filter can be connected through this connection port 8, and then waste liquids such as tissue fluid or lymph fluid can be sucked from the affected area 25. This method can avoid the direct contact between this suction device and the affected area 25 and can be reused. The power module 5 has the function of being rechargeable and dischargeable repeatedly. During use, it is not necessary to be plugged into the power supply. That is, this device is easy to carry, so that the patient's activity range is not restricted during use; specifically, the intelligent control module 3 can control the flow control module 12 to control the flow regulation module 4, so as to adjust the flow rate of the micro vacuum pump 2; adjust the working pressure of the micro vacuum pump 2 through the pressure control module 13, and control the pressure generated when this suction device works according to actual needs. Adjust the working state of this suction device through the regulating valve 11. Specifically, adjust the flow rate and pressure when this suction device performs negative pressure suction on the affected area 25 according to actual needs, and the working time of this suction device can also be adjusted according to needs, to prevent the waste liquid such as tissue fluid or lymph fluid from not being washed clean due to insufficient suction time, and to prevent other injuries caused by excessive suction on the affected area 25 due to too long suction time. This suction device can be used repeatedly for a long time, and its connection safety allows different patients to use it alternately without worrying about whether it is a disposable medical device. Most importantly, the negative pressure suction pump used in this suction device is the micro vacuum pump 2, and the power module 5 is a small battery. One charge can be used for 4 - 6 hours. Therefore, the volume of this suction device is small, easy to use, and can flexibly adjust the regulating valve 11 according to the specific situation when the patient uses it, so as to adjust the power of the micro vacuum pump 2, enabling the patient to carry it with them during use and reducing the cost of using this treatment method.

[0034] Furthermore, a charging port 15 and a safety switch 16 are provided on the housing 1. The safety switch 16 is electrically connected to the intelligent control module 3. Specifically, it is convenient for medical staff or attendants to turn on or off this suction device through the safety switch 16; the energy storage of the power module 5 is limited, and it is convenient to charge this suction device through the charging port 15, and it can be charged in time when the power module 5 runs out of power, facilitating subsequent repeated use.

[0035] Furthermore, a plurality of exhaust holes 17 are provided on the housing 1. The exhaust holes 17 communicate the exhaust port 10 and the outside of the housing 1. The exhaust holes 17 and the exhaust port 10 are connected to discharge the gas sucked out by the micro vacuum pump 2 during operation, so as to maintain the air pressure balance inside this suction device.

[0036] Further, a temperature sensor 18 and a humidity sensor 19 are also provided inside the housing 1. The temperature sensor 18 and the humidity sensor 19 are respectively connected to the intelligent control module 3. The temperature and humidity conditions of the surrounding environment of the suction device can be measured through the temperature sensor 18 and the humidity sensor 19, and then the corresponding data is fed back to the intelligent control module 3, so as to adjust the working parameters of the motor 6 and the micro vacuum pump 2 according to this data, making it reach the most suitable negative pressure suction working state.

[0037] Further, a connecting member 20 is also provided outside the housing 1. The connecting member 20 is any one or several of a magnetic attraction member, a magic tape, a strap, and a hook; specifically, the connecting member 20 is used to fix the suction device on the patient's arm, on the bed frame, on the railing, or at a certain fixed position.

[0038] Reference Figure 3 , a second aspect of the present invention discloses a suction system, which is characterized in that it includes a polymer foam dressing 21, an anti-backflow suction tube 22, a small intelligent negative pressure vacuum suction device as described above, and a waste liquid collection device. The polymer foam dressing 21 is arranged on the surface of the affected area 25. One side of the anti-backflow suction tube 22 is connected to the polymer foam dressing 21, and the other side is connected to the waste liquid collection device. The waste liquid collection device is connected to the small intelligent negative pressure vacuum suction device. Preferably, the polymer foam dressing 21 can also be a sponge.

[0039] Further, the waste liquid collection device includes a drainage bottle 23 and a second pipeline 24. The second pipeline 24 is connected to the small intelligent negative pressure vacuum suction device. Specifically, the drainage bottle 23 is provided with scales, mainly for containing the aspirated substances and for counting the amount of liquid aspirated from the incision by negative pressure every day. The waste liquid collection device also includes a first pipeline, which is connected between the anti-backflow suction tube 22 and the drainage bottle 23. Specifically, the first pipeline can also be a pipeline integrated with the anti-backflow suction tube 22, for guiding the waste liquid such as tissue fluid or lymph fluid of the affected area 25 into the drainage bottle 23. The second pipeline 24 is used to conduct the small intelligent negative pressure vacuum suction device and the drainage bottle 23, for providing suction force for the whole pipeline and for conducting each pipeline to facilitate the export of the waste liquid.

[0040] Specifically, the polymer foam dressing 21, the anti-reflux drainage tube 22, and the waste liquid collection device can all be disposable medical devices and can be discarded in a medical waste bin after being used in contact with the affected area 25, or they can be reusable materials and can be reused after being strictly disinfected at high temperature; and through the cooperation of the above-mentioned disposable / reusable medical devices and a small intelligent negative pressure vacuum suction device disclosed in the first aspect of the present invention, on the one hand, the disposable / reusable medical device directly in contact with the affected area 25 can be replaced only when needed, and this suction device can be reused repeatedly without replacing the suction pump and without repeated disinfection. Since it does not come into contact with the affected area 25, when necessary, after being connected to the disinfected connective medical device for use, the suction device can be reused and only the connective medical device needs to be replaced.

[0041] Reference Figure 3 and Figure 4 , the third aspect of the present invention discloses a suction method, including the following steps:

[0042] S1: Lay the polymer foam dressing 21 on the surface of the affected area 25; set one end of the anti-reflux drainage tube 22 on the polymer foam dressing 21;

[0043] S2: Connect the other end of the anti-reflux drainage tube 22 to the waste liquid collection device;

[0044] S3: Connect the waste liquid collection device to the suction port 9 of the small intelligent negative pressure vacuum suction device;

[0045] S4: Start the small intelligent negative pressure vacuum suction device, and according to the actual situation of the affected area 25, adjust its working mode through the regulating valve 11 on the housing 1 of the small intelligent negative pressure vacuum suction device. The working mode includes working time, working frequency, and suction flow rate.

[0046] The use of this suction method is conducive to fully draining the incision affected area 25 and keeping it dry to promote incision healing. Specifically, during the postoperative rehabilitation treatment, the patient can carry a small intelligent negative pressure vacuum suction device to get out of bed and move around, resume daily standing activities as early as possible, promote the recovery of gastrointestinal function, facilitate the absorption and excretion of food, and avoid poor gastrointestinal function caused by long-term bed rest after surgery, the need for drug stimulation for eating or help with defecation. Moreover, by using this method, the patient can avoid changing dressings multiple times a day. This method can keep the incision dressing clean and dry for 2-3 days. At the same time, the user can carry the small intelligent negative pressure vacuum suction device back to their place of residence, avoiding psychological depression or inconvenience in life caused by long-term stay in the hospital, and reducing the hospitalization treatment cost. In addition, this suction device can be reused and used alternately by multiple patients without worrying about whether it is a disposable item, and it can also reduce the use cost of the pump and reduce the economic burden on patients; the power of the suction device can also be adjusted according to the amount of drainage fluid in the incision, whether the patient himself has discomfort, and the state of the suction tube to control the pressure of the intelligent vacuum pump. For patients or their families using it for the first time, due to lack of experience, they can switch to the adjusted intelligent mode to start the operation of the vacuum pump, while patients or their families with sufficient experience can manually adjust the power of the pump according to their specific conditions. Using this suction method can keep the incision dry and clean for a long time, minimizing the conditions for bacteria to grow as much as possible. It can not only reduce the use of antibiotics, but also promote the healing of the incision. The healed incision can shorten the repair time of lymphatic vessels and the growth and healing time of the incision, which has great benefits.

[0047] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A small intelligent negative pressure vacuum suction device, characterized in that, It includes a housing (1), inside which there are a micro vacuum pump (2), an intelligent control module (3), a flow rate adjustment module (4), a power supply module (5) and a motor (6). A display screen (7) is provided on the housing (1), and a connection port (8) is provided on one side of the housing (1). The motor (6) is used to drive the micro vacuum pump (2) to work. The micro vacuum pump (2) is provided with an air inlet (9) and an air outlet (10). The air inlet (9) communicates with the outside of the housing (1) through the connection port (8). A regulating valve (11) is provided on the outside of the housing (1), and the regulating valve (11) is connected to the intelligent control module (3) inside the housing (1). The intelligent control module (3) includes a flow rate control module (12), a pressure control module (13) and a timing module (14). The micro vacuum pump (2), the flow rate adjustment module (4) and the motor (6) are all connected to the intelligent control module (3). The intelligent control module (3) and the display screen (7) are both electrically connected to the power supply module (5).

2. The small intelligent negative pressure vacuum suction device according to claim 1, characterized in that, A charging port (15) and a safety switch (16) are provided on the housing (1), and the safety switch (16) is electrically connected to the intelligent control module (3).

3. A small intelligent negative pressure vacuum suction device according to claim 1, characterized in that, A number of exhaust holes (17) are provided on the housing (1), and the exhaust holes (17) communicate the air outlet (10) with the outside of the housing (1).

4. A small intelligent negative pressure vacuum suction device according to claim 3, characterized in that, A temperature sensor (18) and a humidity sensor (19) are also provided inside the housing (1), and the temperature sensor (18) and the humidity sensor (19) are respectively connected to the intelligent control module (3).

5. A small intelligent negative pressure vacuum suction device according to claim 4, characterized in that, A connecting member (20) is also provided on the outside of the housing (1), and the connecting member (20) is any one or several of a magnetic attraction member, a magic tape, a binding band, and a hook.

6. An attracting system, characterized in that, It includes a polymer foam dressing (21), an anti-backflow drainage tube (22), a small intelligent negative pressure vacuum suction device as described in any one of claims 1-5, and a waste liquid collection device. The polymer foam dressing (21) is arranged on the surface of the affected area (25). One side of the anti-backflow drainage tube (22) is connected to the polymer foam dressing (21), and the other side is connected to the waste liquid collection device. The waste liquid collection device is connected to the small intelligent negative pressure vacuum suction device.

7. An attracting system according to claim 1, characterized in that, The waste liquid collection device includes a drainage bottle (23) and a second pipeline (24), and the second pipeline (24) is connected to the small intelligent negative pressure vacuum suction device.

8. An attracting method, characterized in that, It includes the following steps: S1: Lay the polymer foam dressing (21) on the surface of the affected area (25); arrange one end of the anti-backflow drainage tube (22) on the polymer foam dressing (21); S2: Connect the other end of the anti-backflow drainage tube (22) to the waste liquid collection device; S3: Connect the waste liquid collection device to the air inlet (9) of the small intelligent negative pressure vacuum suction device; S4: Start the small intelligent negative pressure vacuum suction device. According to the actual situation of the affected area (25), adjust its working mode through the regulating valve (11) on the housing (1) of the small intelligent negative pressure vacuum suction device. The working mode includes working time, working frequency, and suction flow rate.