Negative pressure suction system and preparation method of adsorption head unit

Abstract

The present invention relates to the field of medical device technology, and discloses a method for preparing a negative pressure suction system and an adsorption head unit. The negative pressure suction system is used for drainage and debridement during surgery, and the negative pressure drainage ball can have a negative pressure state. The adsorption head unit is formed by gluing two adsorption sheets together to form a flexible adsorption pad. The second drainage tube is spirally placed in the drainage cavity and connected to the first drainage tube to ensure assembly stability and facilitate control of the drainage process. The fluid in the surgical area is sucked into the drainage cavity through the first through hole on the flexible adsorption pad, and then sucked into the second drainage tube through the drainage hole, and enters the negative pressure drainage ball through the first drainage tube. As the fluid is sucked into the negative pressure drainage ball from the outside, the negative pressure in the negative pressure drainage ball decreases. The soft and deformable flexible adsorption pad can better conform to the shape of the surgical area to avoid secondary damage. It can adapt to surgical areas of different specifications for timely and continuous comprehensive drainage, ensure rapid and efficient drainage, and facilitate improving the safety and therapeutic effect of the surgery.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a negative pressure suction system and a method for preparing an adsorption head unit. Background Art

[0002] In most microsurgeries, drainage and debridement are required to improve the clarity of the surgical field, simplify the operation techniques, and help medical staff improve surgical efficiency. For example, during microsurgery, vascular and lymphatic anastomosis, blood, tissue exudates, and heparinized water flushing fluid flowing out of the blood vessels during the operation must be continuously absorbed. The duration is very short, with a maximum of no more than 30 minutes.

[0003] In the prior art, medical personnel generally use gauze and other absorbents with liquid adsorption capacity to press on the surgical area to absorb the fluid into the absorbent and take it away. This is not only difficult to control the adsorption speed, but also has the risk of secondary damage to the surgical area, and the gauze is likely to bring clothes into the surgical area and cause infection; some medical personnel also use syringes or droppers and other straw-shaped instruments to suction the fluid under negative pressure, but due to the small suction port, there is still a problem of low efficiency, especially for some large surgical areas, it is impossible to drain in a timely and comprehensive manner.

[0004] Therefore, it is urgent to design an efficient and adaptable drainage device to help improve the safety and treatment effect of the operation. Summary of the Invention

[0005] The purpose of the present invention is to provide a negative pressure suction system and a preparation method of an adsorption head unit, which has stable assembly and is convenient for controlling the drainage process; it can adapt to timely and continuous comprehensive drainage of surgical areas of different sizes during surgery, provide a clear field of view for surgery, and ensure rapid and efficient drainage and safety of surgery.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] Vacuum suction system, including:

[0008] A negative pressure drainage ball, wherein the negative pressure drainage ball is provided with an exhaust hole, and the exhaust hole is selectively blocked;

[0009] a first drainage module, wherein the first drainage module comprises a first drainage tube and an adsorption head unit, the adsorption head unit comprises a flexible adsorption pad and a second drainage tube, the first drainage tube being connected to the second drainage tube and the negative pressure drainage ball; the flexible adsorption pad comprises two adsorption sheets, the outer peripheries of the two adsorption sheets are relatively connected, a drainage cavity is provided inside the two adsorption sheets, a plurality of first through holes are provided on the flexible adsorption pad, and the first through holes are provided on the cavity wall of the drainage cavity to connect the drainage cavity with the outside world; the second drainage tube is spirally placed in the drainage cavity, the second drainage tube is provided with a plurality of drainage holes, the drainage holes being connected to the second drainage tube and the drainage cavity, and at least part of the second drainage tube can pass through the flexible adsorption pad and be connected to the first drainage tube;

[0010] The negative pressure drainage ball provides negative pressure to the first drainage module, so that the fluid flows into the drainage cavity through the first through hole, and is drained through the drainage hole, passes through the second drainage tube and the first drainage tube in sequence until it flows into the negative pressure drainage ball.

[0011] As an optional technical solution for the negative pressure suction system, the negative pressure suction system also includes a multi-way connector, which includes a plurality of connectors that are integrally arranged and connected, one of which is connected to the negative pressure drainage ball, at least one of which is connected to the first drainage tube, and the remaining connectors are selectively blocked.

[0012] As an optional technical solution for the negative pressure suction system, the negative pressure suction system also includes a second drainage module, which includes a third drainage tube and a sponge head. At least one of the connectors is connected to the third drainage tube, and the sponge head is connected to the negative pressure drainage ball; the sponge head is made of polyvinyl alcohol or polyurethane.

[0013] As an optional technical solution of the negative pressure suction system, the first drainage tube is provided with a one-way valve, and the one-way valve is used to control the fluid to flow only toward the negative pressure drainage ball.

[0014] As an optional technical solution of the negative pressure suction system, the drainage holes are distributed at intervals along the axial direction of the second drainage tube.

[0015] As an optional technical solution of the negative pressure suction system, support ribs are provided inside the second drainage tube.

[0016] As an optional technical solution for the negative pressure suction system, the two side surfaces of the flexible adsorption pad are respectively set with different colors; the negative pressure suction system also includes a hemostatic clamp, and the hemostatic clamp includes an arterial hemostatic clamp or a venous hemostatic clamp, and the surface of the arterial hemostatic clamp and the surface of the venous hemostatic clamp are respectively set with different colors; the hemostatic clamp is selectively placed on the upper surface of the flexible adsorption pad.

[0017] As an optional technical solution for the negative pressure suction system, the flexible adsorption pad is provided with a plurality of second through holes on the edge around the drainage cavity.

[0018] As an optional technical solution of the negative pressure suction system, the surface of the flexible adsorption pad is provided with a plurality of crisscrossing measurement microgrooves.

[0019] As an optional technical solution for the negative pressure suction system, adjacent measuring microgrooves are arranged in parallel and spaced 1 mm apart, and the drainage hole is located at the intersection of two crisscrossing measuring microgrooves.

[0020] As an optional technical solution for the negative pressure suction system, the negative pressure suction system also includes an exhaust module, which includes a ventilation tube and a tube clamp. The ventilation tube is connected to the exhaust hole to connect the negative pressure drainage ball with the outside world. The tube clamp is arranged outside the ventilation tube for selectively blocking the ventilation tube.

[0021] A method for preparing an adsorption head unit, used to prepare an adsorption head unit as described in any of the above items, comprising: selecting two adsorption sheets, reserving an exit channel for the second drainage tube at the edges of the two adsorption sheets, and fixing the other edges to each other with an adhesive to form a flexible adsorption pad with a drainage cavity in the middle, the exit channel being connected to the drainage cavity; placing the second drainage tube in the drainage cavity, and at least part of the second drainage tube passing through the exit channel to exit the flexible adsorption pad.

[0022] Beneficial effects of the present invention:

[0023] The negative pressure suction system provided by the present invention includes a negative pressure drainage ball and a first drainage module, and is used in surgical scenarios to provide timely drainage and debridement. The negative pressure drainage ball has a vent hole at its end, which can be selectively blocked. The negative pressure drainage ball has a large internal volume, and exhaust is released to the outside through the vent hole, and then the vent hole is closed and blocked, generating a large negative pressure, greatly improving the drainage speed. The first drainage module includes a first drainage tube and an adsorption head unit. The adsorption head unit includes a flexible adsorption pad and a second drainage tube. The first drainage tube is connected to the second drainage tube and the negative pressure drainage ball. A drainage cavity is opened in the flexible adsorption pad. A plurality of first through holes are opened on the flexible adsorption pad. The first through holes are arranged on the wall of the drainage cavity to connect the drainage cavity with the outside world. The flexible adsorption pad is used to be placed in the surgical area. The soft and deformable flexible adsorption pad can better conform to the shape of the surgical area. The second drainage tube is coiled in the drainage cavity. The second drainage tube is opened with a plurality of drainage holes. The drainage holes connect the second drainage tube and the drainage cavity. At least part of the second drainage tube can pass through the flexible adsorption pad and be connected to the first drainage tube. When the negative pressure drainage ball is under negative pressure, fluid within the surgical area is drawn into the drainage cavity through the first through-hole in the flexible adsorption pad, then through the drainage hole into the second drainage tube, and finally into the negative pressure drainage ball through the first drainage tube. As fluid is gradually drawn into the ball from the outside, the negative pressure within the ball gradually decreases. This negative pressure suction system can avoid secondary injuries and adapt to surgical areas of varying sizes for timely, continuous, and comprehensive drainage, ensuring rapid and efficient drainage operations and providing a clear field of view for surgery, thereby improving surgical safety and therapeutic effectiveness.

[0024] The preparation method of the adsorption head unit provided by the present invention is used to prepare the adsorption head unit as described above, and the steps include: selecting two adsorption sheets, reserving an outlet channel at the edges of the two adsorption sheets, and fixing the other edges to each other with an adhesive to form a flexible adsorption pad with a drainage cavity in the middle; placing the second drainage tube disc in the drainage cavity, and connecting the outlet channel to the drainage cavity so that at least part of the second drainage tube can pass through the flexible adsorption pad through the outlet channel, and can subsequently be connected to the first drainage tube to facilitate control of the drainage process. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a negative pressure suction system provided by a specific embodiment of the present invention;

[0026] Figure 2 is a partial truncated view of the first drainage module of the negative pressure suction system provided in a specific embodiment of the present invention;

[0027] Figure 3 This is a partial truncated view of the first drainage module of the negative pressure suction system provided by a specific embodiment of the present invention, in which one of the adsorption sheets is hidden;

[0028] Figure 4 is a cross-sectional view of a second drainage tube of a negative pressure suction system provided in a specific embodiment of the present invention;

[0029] Figure 5 It is a structural schematic diagram of an adsorption sheet in another embodiment of a negative pressure suction system provided by a specific embodiment of the present invention.

[0030] In the picture:

[0031] 100. Negative pressure drainage ball;

[0032] 200, first drainage module; 210, first drainage tube; 211, one-way valve; 220, adsorption head unit; 221, flexible adsorption pad; 2210, adsorption sheet; 2211, first through hole; 2212, second through hole; 2213, drainage groove; 2214, measurement microgroove; 222, second drainage tube; 2221, drainage hole; 2222, support rib;

[0033] 300, multi-way connector; 400, second drainage module; 410, third drainage tube; 420, sponge head; 500, hemostatic clip; 600, exhaust module; 610, ventilation tube; 620, tube clamp. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0035] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0036] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0037] In the description of this embodiment, terms such as "upper," "lower," "right," and "left" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0038] like Figures 1 to 5 As shown, the present invention discloses a negative pressure suction system, including a negative pressure drainage ball 100 and a first drainage module 200, which can be used in surgical scenarios to drain and debride wounds in a timely manner. The negative pressure drainage ball 100 has a large internal volume, and exhaust is exhausted to the outside through the exhaust hole at the end of the negative pressure drainage ball 100, which can generate a large negative pressure, which means that the drainage speed can be greatly improved.

[0039] Specifically, the negative pressure suction system also includes an exhaust module 600, which includes a ventilation tube 610 and a tube clamp 620. The ventilation tube 610 is connected to the exhaust hole to connect the negative pressure drainage ball 100 with the outside world. By squeezing the negative pressure drainage ball 100, the air inside the negative pressure drainage ball 100 can be exhausted to the outside world; then, the tube clamp 620 is used to be sleeved on the outside of the ventilation tube 610 to close and quickly block the ventilation tube 610. Under negative pressure, the negative pressure drainage ball 100 is disconnected from the outside world. The opening and closing of the tube clamp 620 can control the blocking condition of the ventilation tube 610, making it easier for medical staff to control the negative pressure state of the negative pressure drainage ball 100. For example, the specifications of the negative pressure drainage ball 100 are selected, and the negative pressure that can be achieved can be controlled within the range of 10 kPa to 35 kPa.

[0040] The first drainage module 200 includes a first drainage tube 210 and an adsorption head unit 220. The adsorption head unit 220 includes a flexible adsorption pad 221 and a second drainage tube 222. The first drainage tube 210 connects the second drainage tube 222 and the negative pressure drainage ball 100. The first drainage tube 210 and the second drainage tube 222 can be made of TPU (thermoplastic polyurethane) hoses with the same diameter. The flexible adsorption pad 221 includes two adsorption sheets 2210, the outer peripheries of the two adsorption sheets 2210 are relatively connected, and a drainage cavity is opened inside between the two adsorption sheets 2210. A plurality of first through holes 2211 are opened on the flexible adsorption pad 221, and the first through holes 2211 are arranged on the cavity wall of the drainage cavity to connect the drainage cavity with the outside world; the flexible adsorption pad 221 is used to be placed in the surgical area, and the soft and deformable flexible adsorption pad 221 can better cooperate with the sunken part of the surgical area; the second drainage tube 222 is spirally placed in the drainage cavity, and the second drainage tube 222 is provided with a plurality of drainage holes 2221, and the drainage holes 2221 connect the second drainage tube 222 and the drainage cavity; at least part of the second drainage tube 222 can pass through the flexible adsorption pad 221 and be connected with the first drainage tube 210. The negative pressure drainage ball 100 is currently in a negative pressure state. The fluid in the surgical area is sucked into the drainage cavity through the first through hole 2211 on the flexible adsorption pad 221, and then sucked into the second drainage tube 222 through the drainage hole 2221, and enters the negative pressure drainage ball 100 through the first drainage tube 210. As the fluid is gradually sucked into the negative pressure drainage ball 100 from the outside, the negative pressure inside the negative pressure drainage ball 100 gradually decreases.

[0041] The effective adsorption time of the current negative pressure suction system can be calculated based on the opening area of ​​the multiple drainage holes 2221 combined with the negative pressure state, and the adsorption process is generally controlled to 4 minutes to 5 minutes. The use of this negative pressure suction system can avoid secondary injuries, and can adapt to surgical areas of different sizes for timely and continuous comprehensive drainage, ensuring that the drainage operation is fast and efficient. The adsorption head unit 220 uses drainage holes 2221 as a microfluidic channel structure, which effectively solves the risk of microvessels being sucked in and causing vascular damage due to excessive adsorption force, protects the tiny blood vessels to be anastomosed, and reduces postoperative complications. According to the formula F (adsorption force) = P (pressure) * S (area), the drainage path is dispersed into multiple drainage holes 2221, reducing the area S. When the pressure P is constant, the output adsorption force F can be reduced. This principle is used to reduce the adsorption force of the negative pressure suction system on the blood vessels, and the negative pressure size is reasonably controlled to improve the safety of the operation and the treatment effect.

[0042] The present invention also discloses a method for preparing an adsorption head unit, which is used to prepare the adsorption head unit 220 described above. The steps include: first, selecting two adsorption sheets 2210. The material of the adsorption sheets 2210 can be silicone or PEBA (a nylon elastomer formed from a polyetheramide block copolymer). Adsorption sheets 2210 made of PEBA have higher flexibility and better processing performance, can achieve precise dimensional stability, and can be made into lighter and thinner adsorption sheets 2210. For example, the thickness of a single adsorption sheet 2210 is approximately 0.06 mm. The adsorption head unit adopts a series of specifications and sizes. The maximum length and width of a single adsorption sheet 2210 can reach 50 cm by 25 cm. It can dynamically adapt to different surgical needs according to the actual size of the clinical surgical area.

[0043] An exit channel is reserved at the edges of the two adsorption sheets 2210, and the other edges are fixed relative to each other by adhesive, so as to form a flexible adsorption pad 221 with a drainage cavity in the middle. In this embodiment, drainage grooves 2213 are first dug on the two adsorption sheets 2210 respectively, and the second drainage tube 222 is placed in one of the drainage grooves 2213. Then, the two adsorption sheets 2210 are fixed by adhesive to form a flexible adsorption pad 221, so that the two drainage grooves 2213 are relatively buckled to form a drainage cavity. The second drainage tube 222 is placed in the drainage cavity, and the exit channel is connected to the drainage cavity, so that at least part of the second drainage tube 222 can pass through the exit channel to pass through the flexible adsorption pad 221, and can be subsequently connected to the first drainage tube 210 to facilitate control of the drainage process.

[0044] Specifically, the drainage holes 2221 are evenly spaced along the axial direction of the second drainage tube 222. The shape of the second drainage tube 222 coiled within the drainage cavity can be similar to a mosquito coil or spider web. Preferably, each turn of the second drainage tube 222 is at least 90°. This ensures that the second drainage tube 222 within the drainage cavity does not fold over and create dead corners during drainage, ensuring smooth drainage. Furthermore, provided that all drainage holes 2221 on the coiled portion of the second drainage tube 222 are symmetrically arranged, the opening directions of two adjacent drainage holes 2221 can be altered, with the opening directions of the two symmetrical drainage holes 2221 being in the same or opposite directions to improve drainage efficiency.

[0045] In this embodiment, if Figure 4 As shown, the second drainage tube 222 is provided with support ribs 2222. The support ribs 2222 ensure that the second drainage tube 222 will not be completely blocked, resulting in poor fluid absorption, even when the second drainage tube 222 is squeezed and deformed or the suction force is too strong, thereby improving the reliability of the negative pressure suction system. The support ribs 2222 can be arranged in a long strip along the axial direction of the second drainage tube 222, or they can be arranged at the turns or weak points of each spiral of the second drainage tube 222.

[0046] Continue to refer Figures 1 to 5 The negative pressure suction system also includes a multi-way connector 300, which includes multiple integrally connected connectors. One connector is connected to the negative pressure drainage ball 100, at least one connector is connected to the first drainage tube 210, and the remaining connectors are selectively blocked. For example, the multi-way connector 300 can be a Luer three-way valve, which can be used to both open and close the valve and adjust the flow rate.

[0047] In this embodiment, the negative pressure suction system also includes a second drainage module 400, which includes a third drainage tube 410 and a sponge head 420. At least one connector is connected to the third drainage tube 410, and the sponge head 420 is connected to the negative pressure drainage ball 100. The shape of the sponge head 420 can be trimmed to fit the deep and narrow location of the surgical area, making it easy to place it in a location that the flexible adsorption pad 221 cannot reach to quickly absorb body fluids, blood, flushing fluids, etc., thereby improving surgical efficiency and the success rate of the surgery. The material of the sponge head 420 can be selected from polyvinyl alcohol or polyurethane with high water absorption.

[0048] It is understandable that the first drainage tube 210 is provided with a one-way valve 211, which is used to control the fluid to flow only toward the negative pressure drainage ball 100, thereby preventing the liquid in the negative pressure drainage ball from flowing back to the surgical area.

[0049] Specifically, the negative pressure suction system also includes a hemostatic clamp 500. In order to form a strong visual contrast during surgery and maintain a clear surgical field, the two side surfaces of the flexible adsorption pad 221 are set with different colors respectively. While maintaining a strong contrast with the tissues around the surgical area, it also forms a strong contrast with the hemostatic clamp 500. The two colors can be selected from commonly used contrasting colors in clinical practice. The hemostatic clamp 500 includes an arterial hemostatic clamp or a venous hemostatic clamp. The surface of the arterial hemostatic clamp and the surface of the venous hemostatic clamp are set with different colors respectively. For example, the venous hemostatic clamp with a smaller clamping force is blue, and the arterial hemostatic clamp with a larger clamping force is yellow. Different hemostatic clamps 500 can be quickly distinguished and the corresponding blood vessels can be clamped in time. Since the surgical areas using the negative pressure suction system are located in different positions, there may be broken ends of arteries or veins with different diameters. Therefore, the negative pressure suction system needs to be equipped with corresponding arterial hemostatic clamps or venous hemostatic clamps. After the hemostatic clamp 500 clamps the corresponding blood vessel, it is placed on the upper surface of the flexible adsorption pad 221. It can be used continuously during the operation without changing the working position, avoiding the defects of surgical field displacement and vibration, simplifying the operating steps, and assisting medical staff to concentrate on other operations during the operation.

[0050] When performing venous anastomosis, the yellow side of the flexible adsorption pad 221 is paired with the blue hemostatic clip 500. When performing arterial anastomosis, the blue side of the flexible adsorption pad 221 is paired with the yellow hemostatic clip 500. This forms a strong visual contrast with the surrounding tissues, while also maintaining a strong contrast with other surgical instruments, providing a clearer surgical field for microsurgery and overcoming the problem of lack of contrast between the traditional hemostatic clip system and the surrounding tissues.

[0051] Furthermore, the flexible adsorption pad 221 is provided with a plurality of second through holes 2212 on the edge around the drainage cavity. The purpose of this arrangement is to prevent fluids such as blood, exudate and flushing fluid from accumulating on the surface of the flexible adsorption pad 221 as much as possible, thereby improving the drainage effect of the negative pressure suction system.

[0052] Specific as Figure 1 and Figure 5 As shown, the flexible adsorption pad 221 can isolate blood vessels from surrounding tissue. A plurality of crisscrossing measurement microgrooves 2214 are provided on the surface of the flexible adsorption pad 221. The measurement microgrooves 2214 can reduce the adsorption tension between the blood vessels and the flexible adsorption pad 221 and also assist in drainage. In some cases, medical personnel need to use a suture needle to sew the surgical area. The design of the measurement microgrooves 2214 also provides medical personnel with a needle insertion gap between the surgical area tissue and the surface of the flexible adsorption pad 221, avoiding difficulty in needle insertion and facilitating quick and accurate suturing.

[0053] In this embodiment, adjacent measurement microgrooves 2214 are arranged in parallel to form a "grid" pattern. Drainage holes 2221 are located at the intersection of two crisscrossing measurement microgrooves 2214. This ensures that fluid adhering to the measurement microgrooves 2214 can flow smoothly into the drainage cavity, providing a clearer visual field during surgery. For example, adjacent measurement microgrooves 2214 are spaced 1 mm apart. By placing the flexible adsorption pad 221 within the surgical area and aligning a blood vessel with the measurement microgrooves 2214, the approximate diameter of the blood vessel can be readily determined, providing a quick reference for medical personnel selecting appropriate surgical instruments, such as the hemostatic clip 500.

[0054] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Negative pressure suction system, characterized in that, include: A negative pressure drainage ball (100), wherein the negative pressure drainage ball (100) is provided with an exhaust hole, and the exhaust hole is selectively blocked; A first drainage module (200), the first drainage module (200) comprises a first drainage tube (210) and an adsorption head unit (220), the adsorption head unit (220) comprises a flexible adsorption pad (221) and a second drainage tube (222), the first drainage tube (210) is connected to the second drainage tube (222) and the negative pressure drainage ball (100); the flexible adsorption pad (221) comprises two adsorption sheets (2210), the outer peripheries of the two adsorption sheets (2210) are relatively connected, and a drainage cavity is provided inside the two adsorption sheets (2210), The flexible adsorption pad (221) is provided with a plurality of first through holes (2211), and the first through holes (2211) are arranged on the wall of the drainage cavity to connect the drainage cavity with the outside world; the second drainage tube (222) is spirally placed in the drainage cavity, and the second drainage tube (222) is provided with a plurality of drainage holes (2221), and the drainage holes (2221) connect the second drainage tube (222) and the drainage cavity, and at least part of the second drainage tube (222) can pass through the flexible adsorption pad (221) and be connected to the first drainage tube (210); The negative pressure drainage ball (100) provides negative pressure to the first drainage module (200), so that the fluid passes into the drainage cavity through the first through hole (2211), and is drained through the drainage hole (2221) and passes through the second drainage tube (222) and the first drainage tube (210) in sequence until it flows into the negative pressure drainage ball (100).

2. The negative pressure suction system according to claim 1, characterized in that: The negative pressure suction system also includes a multi-way connector (300), which includes a plurality of connectors that are integrally arranged and connected, one of which is connected to the negative pressure drainage ball (100), at least one of which is connected to the first drainage tube (210), and the remaining connectors are selectively blocked.

3. The negative pressure suction system according to claim 2, characterized in that: The negative pressure suction system further comprises a second drainage module (400), the second drainage module (400) comprising a third drainage tube (410) and a sponge head (420), at least one of the connectors being in communication with the third drainage tube (410), and the sponge head (420) being in communication with the negative pressure drainage ball (100); the sponge head (420) being made of polyvinyl alcohol or polyurethane.

4. The negative pressure suction system according to claim 1, characterized in that: The first drainage tube (210) is provided with a one-way valve (211), and the one-way valve (211) is used to control the fluid to flow only toward the negative pressure drainage ball (100).

5. The negative pressure suction system according to claim 1, characterized in that: The drainage holes (2221) are distributed at intervals along the axial direction of the second drainage tube (222).

6. The negative pressure suction system according to claim 1, characterized in that: Support ribs (2222) are provided inside the second drainage tube (222).

7. The negative pressure suction system according to claim 1, characterized in that: The surfaces on both sides of the flexible adsorption pad (221) are respectively provided with different colors; the negative pressure suction system further comprises a hemostatic clamp (500), the hemostatic clamp (500) comprises an arterial hemostatic clamp or a venous hemostatic clamp, and the surfaces of the arterial hemostatic clamp and the surfaces of the venous hemostatic clamp are respectively provided with different colors; the hemostatic clamp (500) is selectively placed on the upper surface of the flexible adsorption pad (221).

8. The negative pressure suction system according to claim 1, characterized in that: The flexible adsorption pad (221) is provided with a plurality of second through holes (2212) on the edge surrounding the drainage cavity.

9. The negative pressure suction system according to claim 1, characterized in that: The surface of the flexible adsorption pad (221) is provided with a plurality of crisscross measuring microgrooves (2214).

10. The negative pressure suction system according to claim 9, characterized in that: Adjacent measuring microgrooves (2214) are arranged in parallel and spaced 1 mm apart, and the drainage holes (2221) are located at the intersection of two crisscrossing measuring microgrooves (2214).

11. The negative pressure suction system according to any one of claims 1 to 10, characterized in that: The negative pressure suction system also includes an exhaust module (600), which includes a ventilation tube (610) and a tube clamp (620). The ventilation tube (610) is connected to the exhaust hole to connect the negative pressure drainage ball (100) with the outside world, and the tube clamp (620) is sleeved outside the ventilation tube (610) to selectively block the ventilation tube (610).

12. A method for preparing an adsorption head unit, characterized in that: For preparing the adsorption head unit according to any one of claims 1 to 11, comprising: Two adsorption sheets (2210) are selected, and exit channels for the second drainage tube (222) are reserved at the edges of the two adsorption sheets (2210). The other edges are fixed relative to each other by adhesive to form a flexible adsorption pad (221) with a drainage cavity in the middle, and the exit channel is connected to the drainage cavity; The second drainage tube (222) is placed in the drainage cavity, and at least a portion of the second drainage tube (222) passes through the outlet channel and out of the flexible adsorption pad (221).

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