A postoperative drainage device for hepatobiliary surgery to prevent fluid reflux

Abstract

This invention provides a postoperative drainage device for hepatobiliary surgery to prevent reflux of bodily fluids, belonging to the field of postoperative drainage technology in hepatobiliary surgery. It includes a drainage bottle, a drain tube, and a drainage pipe. The drain tube is fixedly connected to the bottom of the drainage bottle, and an exhaust pipe is fixedly connected to the top of the drainage bottle. A connecting strap is fixedly connected to the outer circumference of the drainage bottle, and a sealing plug is fixedly connected to one end of the connecting strap. The sealing plug cooperates with the exhaust pipe. A first anti-reflux component and a second anti-reflux component are provided on the top of the drainage bottle, and the first anti-reflux component and the second anti-reflux component are connected. This application can generate eddies and turbulence in the refluxed drainage fluid, consuming energy and increasing flow resistance, thus achieving initial anti-reflux. Even if a small amount of drainage fluid passes through the conveyor, a third spring in the second anti-reflux component pushes the sealing plate tightly against the inner wall of the top of the expansion shell, ensuring the internal sealing of the fixed shell, thus achieving secondary anti-reflux.

Description

Technical Field

[0001] This invention relates to the field of postoperative drainage technology in hepatobiliary surgery, and more specifically, to a postoperative drainage device for preventing fluid reflux in hepatobiliary surgery. Background Technology

[0002] After hepatobiliary surgery, in order to drain bile, blood, exudate and other fluids from the patient's body and reduce the adverse effects of fluid accumulation on the body's recovery, a drainage device is usually used to guide the pus, blood and fluid accumulated between the body tissues or in the body cavity to the outside of the body. This can prevent the patient's wound from becoming infected, relieve pressure on adjacent organs and tissues, improve symptoms, and promote wound healing.

[0003] Currently, in clinical practice, drainage bags or bottles are mostly used to drain fluid from patient wounds. During postoperative recovery, patients frequently change position, such as from lying down to sitting up or turning over. These positional changes alter the location and direction of the drainage tube within the body, causing an imbalance between the fluid pressure inside the tube and the pressure inside the collection bottle. When the pressure inside the collection bottle relatively increases, the drainage fluid may flow back into the body. Simultaneously, when the drainage fluid collected in the bottle (or bag) reaches a certain volume, the pressure inside the bottle (bag) increases, and if not emptied promptly, reflux can easily occur. Since the drainage fluid itself contains a large number of bacteria, once reflux occurs, these bacteria can re-enter the body, multiply rapidly in a suitable environment, leading to wound infection and symptoms such as redness, swelling, pain, and fever. Furthermore, bacteria may spread throughout the body via the bloodstream, causing sepsis and other serious systemic infections, endangering the patient's life.

[0004] To prevent secondary harm to patients from reflux of drainage fluid, some drainage bottles on the market are equipped with one-way valves to address this issue. While one-way valves effectively prevent reflux, with continuous use, a significant amount of mucus, blood clots, and tissue fragments can accumulate around the sealing plate in the one-way valve. These impurities cannot be promptly drained into the drainage bottle, affecting the sealing effect and causing the sealing plate to fail to close properly, leading to reflux. Furthermore, to ensure its sealing, the internal reset element (spring) of the one-way valve needs a certain reset force. However, the pressure of drainage fluid varies among patients. Therefore, in patients with lower drainage fluid pressure, the sealing plate in the one-way valve may not be able to open due to the drainage fluid, preventing normal drainage. Therefore, there is an urgent need for a postoperative drainage device in hepatobiliary surgery that prevents fluid reflux and addresses these problems. Summary of the Invention

[0005] In the existing technology, the sealing strip of the one-way valve tends to accumulate a lot of mucus, blood clots, and tissue fragments. These impurities cannot be discharged into the drainage bottle in time, which affects the sealing effect of the sealing strip and causes the sealing strip to fail to close and prevent backflow. The purpose of this invention is to provide a drainage device for preventing backflow of body fluids after hepatobiliary surgery.

[0006] To solve the above problems, the present invention adopts the following technical solution:

[0007] A postoperative drainage device for hepatobiliary surgery to prevent reflux of body fluids includes a drainage bottle, a drain tube, and a drainage tube. The drain tube is fixedly connected to the bottom of the drainage bottle, and an exhaust tube is fixedly connected to the top of the drainage bottle. A connecting strap is fixedly connected to the outer circumference of the drainage bottle, and a sealing plug is fixedly connected to one end of the connecting strap. The sealing plug cooperates with the exhaust tube.

[0008] The top of the drainage bottle is provided with a first anti-backflow component and a second anti-backflow component. The first anti-backflow component is connected to the second anti-backflow component, and the second anti-backflow component is disposed at one end of the drainage tube.

[0009] The second anti-backflow component is internally equipped with a cleaning component to prevent clogging and a drive component to provide power to the cleaning component;

[0010] The drive component moves vertically to make the cleaning component move in a circular motion to clean the inside of the second anti-backflow component.

[0011] Optionally, the first anti-backflow component includes a conveyor fixedly connected to the top of the drainage bottle. The conveyor is provided with a first arc-shaped flow channel, a first oblique flow channel, a second arc-shaped flow channel, and a second oblique flow channel. The first arc-shaped flow channel, the first oblique flow channel, the second arc-shaped flow channel, and the second oblique flow channel are all interconnected. The first arc-shaped flow channel and the second arc-shaped flow channel, as well as the first oblique flow channel and the second oblique flow channel, are all staggered at equal distances on the left and right sides inside the conveyor.

[0012] Optionally, the second anti-backflow assembly includes a fixed housing fixedly connected to one end of the conveyor, a connecting pipe provided at one end of the fixed housing, the connecting pipe being threadedly connected to the drain pipe, an expansion shell provided on the outer circumferential wall of the fixed housing, a retaining ring plate fixedly connected to the inner circumferential wall of the expansion shell, a third spring fixedly connected to the outer side of the retaining ring plate, a sealing plate fixedly connected to the top of the third spring, the top of the sealing plate abutting against the top inner wall of the expansion shell, a fixed cylinder fixedly connected to the bottom outer wall of the sealing plate, a positioning plate fixedly connected to the inner circumferential wall of the fixed housing, and one end of the fixed cylinder passing through the positioning plate.

[0013] Optionally, the top outer wall of the sealing sheet is provided with a drainage groove, and the cross-section of the drainage groove is W-shaped.

[0014] Optionally, a fixed cover is fixedly connected to the bottom end of the fixed cylinder, and rotating seats that are evenly distributed in a circle are fixedly connected to the inner circumference of the fixed cover. A rotating block is rotatably connected to the inner wall of the rotating seat, and a thin plate is fixedly connected to one end of the rotating block. There are four sets of thin plates, and the four sets of thin plates form a circular plate.

[0015] Optionally, a retaining ring strip is fixedly connected to the inner circumference of the fixed shell, the cross-section of the retaining ring strip is a right-angled triangle, and a second spring is fixedly connected to the inner circumference of the fixed shell. A stop bar is fixedly connected to the end of the second spring away from the fixed shell, and the cross-section of the stop bar is arc-shaped.

[0016] Optionally, a piston body is provided inside the fixed cylinder, and an installation groove is provided on the outer circumference of the piston body. A sealing ring is provided in the installation groove. A connecting post is fixedly connected to the top outer wall of the piston body. One end of the connecting post passes through the fixed cylinder and the sealing plate. A first spring is fixedly connected to the top outer wall of the piston body. The end of the first spring away from the piston body is fixedly connected to the top inner wall of the fixed cylinder.

[0017] Optionally, the drive assembly includes a connecting cylinder fixedly connected to the outer circumferential wall of the connecting column, a toothed plate fixedly connected to the outer circumferential wall of the connecting cylinder, a gear disk meshing on one side of the toothed plate, a first rotating column fixedly connected to the inner circumferential wall of the gear disk, a second helical gear fixedly connected to the outer circumferential wall of the first rotating column, a first helical gear meshing on the outer circumferential wall of the second helical gear, a second rotating column fixedly connected to the inner circumferential wall of the first helical gear, a first gear ring frame fixedly connected to the outer circumferential wall of the second rotating column, and a second gear ring frame meshing on the outer circumferential wall of the first gear ring frame.

[0018] Optionally, the cleaning assembly includes a crossbar fixedly connected to the inner circumferential wall of the fixed housing, one end of the crossbar being rotatably connected to a sleeve, the second gear ring being fixedly connected to the outer circumferential wall of the sleeve, and a scraper being fixedly connected to the outer circumferential wall of the sleeve, the bottom of the scraper contacting the top of the sealing sheet.

[0019] Optionally, a fixing frame is fixedly connected to the inner circumferential wall of the fixed shell, and the fixing frame is rotatably connected to the second rotating column.

[0020] Compared with the prior art, the technical solution provided by this invention has at least the following beneficial effects:

[0021] In the above scheme, by setting up a first anti-backflow component and a second anti-backflow component, a dual anti-backflow protection is formed for the drainage fluid. In the conveyor of the first anti-backflow component, the first inclined flow channel, the first arc-shaped flow channel, the second inclined flow channel, and the second arc-shaped flow channel cooperate with each other to generate eddies and turbulence in the backflowing drainage fluid, which consumes energy and increases flow resistance, thus achieving the first anti-backflow. Even if a small amount of drainage fluid passes through the conveyor, the third spring in the second anti-backflow component pushes the sealing plate to tightly abut against the inner wall of the top of the expansion shell, ensuring the sealing of the fixed shell and achieving the second anti-backflow. At the same time, the first anti-backflow component reduces the dependence of the second anti-backflow component on the spring force, ensuring that the sealing plate can be stably opened for drainage fluids of different pressures, maintaining the stability of the drainage operation.

[0022] When the drainage bottle is squeezed to expel gas, the gas inside the drainage bottle enters the fixed cover and fixed cylinder, pushing the piston upward, which in turn drives the connecting column and toothed plate to rise. Through the meshing of the toothed plate with the gear disc, and through a series of gear transmissions, the sleeve drives the scraper to make a circular motion, cleaning the top of the sealing plate, scraping off the adhering blood clots, mucus and tissue fragments, preventing the sealing plate from clogging, ensuring that it can close normally in subsequent use, and maintaining the anti-backflow effect of the second anti-backflow component.

[0023] When the gas in the drainage bottle rises, the thin plate that contacts the baffle rod under the action of gravity will rotate due to the upward thrust until the top of the thin plate presses against the bottom of the baffle ring. The four sets of thin plates seal the inner wall of the fixed shell, ensuring that all the rising airflow in the drainage bottle enters the fixed cylinder and acts on the piston body. This increases the rising distance of the piston body, enhances the driving force of the drive component, extends the cleaning time of the cleaning component, and enhances the cleaning effect. It also plays a certain auxiliary role in the anti-backflow effect of the second anti-backflow component. Attached Figure Description

[0024] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the invention and, together with the specification, further serve to explain the principles of the invention and enable those skilled in the art to practice and use the invention.

[0025] Figure 1 This is a schematic diagram of the overall front structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the overall half-sectional structure of the present invention;

[0027] Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A;

[0028] Figure 4 For the present invention Figure 2 Enlarged structural diagram at point B;

[0029] Figure 5 For the present invention Figure 2 Enlarged structural diagram at point C;

[0030] Figure 6 This is a half-sectional planar structural schematic diagram of the drainage bottle, the first anti-backflow component, and the second anti-backflow component in this invention;

[0031] Figure 7 For the present invention Figure 6 Enlarged structural diagram at point D;

[0032] Figure 8 This is a schematic diagram of the flow path of the drainage fluid in the conveyor during backflow in this invention;

[0033] Figure 9 This is a schematic diagram of the flow path of the drainage fluid in the conveyor during drainage in this invention;

[0034] Figure 10 This is a schematic diagram showing the internal structure of the second anti-backflow component of the present invention.

[0035] Figure 11 For the present invention Figure 10 A magnified structural diagram at point E in the middle.

[0036] [Figure Labels]

[0037] 1. Drainage bottle; 2. Drainage tube;

[0038] 3. First anti-backflow component; 301. Conveyor; 302. First arc-shaped flow channel; 303. First inclined flow channel; 304. Second arc-shaped flow channel; 305. Second inclined flow channel;

[0039] 4. Second anti-backflow assembly; 401. Fixed housing; 402. Connecting column; 403. Connecting cylinder; 404. Toothed plate; 405. Gear disk; 406. First rotating column; 407. Fixed frame; 408. First gear ring frame; 409. Second rotating column; 410. Crossbar; 411. Sleeve; 412. Scraper; 413. Second gear ring frame; 414. Sealing plate; 415. First spring; 416. 417. Connector; 418. Retaining ring strip; 419. Thin plate; 420. Rotating seat; 421. Rotating block; 422. Fixed cover; 423. Positioning plate; 424. Second spring; 425. Stop bar; 426. Third spring; 427. Expansion shell; 428. Drainage groove; 429. Retaining ring plate; 430. Piston body; 431. Sealing ring; 432. First helical gear; 433. Second helical gear; 434. Fixed cylinder;

[0040] 5. Drainage tube; 6. Connecting strap; 7. Sealing plug; 8. Vent pipe; a. Flow direction of drainage fluid during backflow; b. Flow direction of drainage fluid during drainage.

[0041] As shown in the figure, specific structures and devices are labeled in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0042] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should also be noted that, to make the embodiments more comprehensive, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some well-known technologies; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0043] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0044] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0045] It is understood that the meanings of “on”, “above”, and “above” in this invention should be interpreted in the broadest manner, such that “on” means not only “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” means not only “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0046] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0047] like Figures 1 to 11 As shown, this embodiment of the invention provides a postoperative drainage device for preventing fluid reflux in hepatobiliary surgery, including a drainage bottle 1, a drain tube 2, and a drainage tube 5. The drain tube 2 is fixedly connected to the bottom of the drainage bottle 1, and an exhaust pipe 8 is fixedly connected to the top of the drainage bottle 1. A connecting strap 6 is fixedly connected to the outer circumference of the drainage bottle 1, and a sealing plug 7 is fixedly connected to one end of the connecting strap 6. The sealing plug 7 cooperates with the exhaust pipe 8.

[0048] The top of the drainage bottle 1 is provided with a first anti-backflow component 3 and a second anti-backflow component 4. The first anti-backflow component 3 and the second anti-backflow component 4 are connected. The second anti-backflow component 4 is located at one end of the drainage tube 5.

[0049] The second anti-backflow component 4 is internally equipped with a cleaning component to prevent clogging and a drive component to power the cleaning component.

[0050] The drive component moves vertically to make the cleaning component move in a circular motion to clean the inside of the second anti-backflow component 4. The top of the drainage bottle 1 is equipped with an exhaust pipe 8 to regulate the air pressure inside the bottle. The outer circumference of the drainage bottle 1 is connected to a sealing plug 7 via a connecting strap 6. The sealing plug 7 can cooperate with the exhaust pipe 8 to control the opening and closing of the exhaust pipe 8. The first anti-backflow component 3 and the second anti-backflow component 4 set on the top of the drainage bottle 1 are interconnected. The second anti-backflow component 4 is connected to one end of the drainage tube 5. This structural design can effectively prevent the drainage fluid from flowing back and ensure the safety of the drainage process. At the same time, the cleaning component and the drive component inside the second anti-backflow component 4 cooperate with each other. The drive component moves vertically to drive the cleaning component to move in a circular motion to clean the inside of the second anti-backflow component 4, avoid blockage, and ensure the normal operation of the drainage device.

[0051] The first anti-backflow component 3 includes a conveyor 301 fixedly connected to the top of the drainage bottle 1. The conveyor 301 has a first arc-shaped flow channel 302, a first inclined flow channel 303, a second arc-shaped flow channel 304, and a second inclined flow channel 305 respectively. The first arc-shaped flow channel 302, the first inclined flow channel 303, the second arc-shaped flow channel 304, and the second inclined flow channel 305 are all interconnected. The first arc-shaped flow channel 302 and the second arc-shaped flow channel 304, the first inclined flow channel 303, and the second inclined flow channel 305 are all staggered at equal distances on the left and right sides inside the conveyor 301. When the drainage fluid flows back, this flow channel structure will cause the drainage fluid to generate eddies and turbulence in the first arc-shaped flow channel 302 and the second arc-shaped flow channel 304, which consumes the energy of the drainage fluid and increases its flow resistance, thereby hindering the reverse flow of the drainage fluid and realizing the first anti-backflow of the drainage fluid.

[0052] The second anti-backflow assembly 4 includes a fixed housing 401 fixedly connected to one end of the conveyor 301. A connecting pipe 416 is provided at one end of the fixed housing 401, which is threadedly connected to the drain pipe 5. An expansion shell 426 is provided on the outer circumference of the fixed housing 401. A baffle plate 428 is fixedly connected to the inner circumference of the expansion shell 426. A third spring 425 is fixedly connected to the outside of the baffle plate 428. A sealing plate 414 is fixedly connected to the top of the third spring 425. The top of the sealing plate 414 abuts against the top inner wall of the expansion shell 426. A fixed cylinder 433 is fixedly connected to the bottom outer wall of the sealing plate 414. A positioning plate 422 is fixedly connected to the inner circumference of the fixed cylinder 433. One end of the fixed cylinder 433 passes through the positioning plate 422. When the drainage fluid is draining normally, the pressure generated by the drainage fluid pushes the sealing plate 414 to overcome the elastic force of the third spring 425. The hydraulic pressure generated by the drainage fluid presses the sealing plate 414 downward, creating a gap between the sealing plate 414 and the top of the expansion shell 426, allowing the sealing plate 414 to open and complete the drainage. When backflow occurs, the elastic force of the third spring 425 causes the sealing plate 414 to press against the inner wall of the top of the expansion shell 426, ensuring the sealing of the entire fixed shell 401 and preventing the drainage fluid from flowing back, thus achieving a second anti-backflow.

[0053] The top outer wall of the sealing plate 414 is provided with a drainage groove 427. The cross-section of the drainage groove 427 is W-shaped. The W-shaped drainage groove 427 can better guide the flow of drainage fluid, reduce the residue of drainage fluid on the top of the sealing plate 414, and ensure the smooth drainage process.

[0054] A fixed cover 421 is fixedly connected to the bottom end of the fixed cylinder 433. A rotating seat 419 is fixedly connected to the inner circumference of the fixed cover 421 in a circular arrangement at equal intervals. A rotating block 420 is rotatably connected to the inner wall of the rotating seat 419. A thin plate 418 is fixedly connected to one end of the rotating block 420. There are four sets of thin plates 418, which form a circular plate. During the process of the gas in the drainage bottle 1 rising into the fixed cover 421 and the fixed cylinder 433, the thin plate 418 that is in contact with the baffle 424 due to gravity will be pushed upward, causing the thin plate 418 to rotate until its top is pressed against the bottom of the baffle strip 417. At this time, the four sets of thin plates 418 seal the inner wall of the fixed shell 401, ensuring that the rising airflow in the drainage bottle 1 enters the interior of the fixed cylinder 433 through the fixed cover 421 and acts on the piston body 429, increasing the rising distance of the piston body 429, thereby increasing the driving force of the drive component and improving the cleaning effect of the cleaning component.

[0055] A retaining ring strip 417 is fixedly connected to the inner circumference of the fixed shell 401. The cross-section of the retaining ring strip 417 is a right-angled triangle. A second spring 423 is fixedly connected to the inner circumference of the fixed shell 401. A stop rod 424 is fixedly connected to the end of the second spring 423 away from the fixed shell 401. The cross-section of the stop rod 424 is arc-shaped. The cooperation between the retaining ring strip 417 and the stop rod 424 can play a certain role in limiting and supporting the thin plate 418 during rotation, ensuring that the thin plate 418 can accurately abut against the bottom of the retaining ring strip 417 and achieve a good sealing effect.

[0056] A piston body 429 is provided inside the fixed cylinder 433. The outer circumferential wall of the piston body 429 has an installation groove, and a sealing ring 430 is provided in the installation groove. A connecting post 402 is fixedly connected to the top outer wall of the piston body 429. One end of the connecting post 402 passes through the fixed cylinder 433 and the sealing plate 414. A first spring 415 is fixedly connected to the top outer wall of the piston body 429. The end of the first spring 415 away from the piston body 429 is fixedly connected to the top inner wall of the fixed cylinder 433. When the gas in the drainage bottle 1 enters the fixed cylinder 433 and increases the gas pressure, it applies an upward lifting force to the piston body 429, causing the piston body 429 and the connecting post 402 to rise, providing power for the drive assembly. When the gas is discharged, the first spring 415 resets the piston body 429.

[0057] The drive assembly includes a connecting cylinder 403 fixedly connected to the outer circumferential wall of the connecting column 402. Gear plates 404 are fixedly connected to both sides of the outer circumferential wall of the connecting cylinder 403. A gear disk 405 meshes with one side of the gear plate 404. A first rotating column 406 is fixedly connected to the inner circumferential wall of the gear disk 405. A second helical gear 432 is fixedly connected to the outer circumferential wall of the first rotating column 406. A first helical gear 431 meshes with the outer circumferential wall of the second helical gear 432. A second rotating column 409 is fixedly connected to the inner circumferential wall of the first helical gear 431. A first gear ring frame 408 is fixedly connected to the outer circumferential wall of the second rotating column 409. A second gear ring frame 413 meshes with the outer circumferential wall of the first gear ring frame 408. When the connecting column 402 rises, causing the gear plates 404 to rise, the second gear ring frame 413 is ultimately rotated via gear transmission, providing power to the cleaning assembly.

[0058] The cleaning component includes a crossbar 410 fixedly connected to the inner circumferential wall of the fixed housing 401. One end of the crossbar 410 is rotatably connected to a sleeve 411. A second gear ring frame 413 is fixedly connected to the outer circumferential wall of the sleeve 411. A scraper 412 is fixedly connected to the outer circumferential wall of the sleeve 411. The bottom of the scraper 412 contacts the top of the sealing sheet 414. When the drive component drives the second gear ring frame 413 to rotate, the sleeve 411 moves in a circular motion, thereby driving the scraper 412 to clean the top of the sealing sheet 414, scraping off adhering blood clots, mucus, and tissue fragments, ensuring the cleanliness of the surface of the sealing sheet 414, avoiding blockage, and maintaining the anti-backflow effect of the second anti-backflow component 4.

[0059] A fixing frame 407 is fixedly connected to the inner circumference of the fixed housing 401. The fixing frame 407 is rotatably connected to the second rotating column 409. The fixing frame 407 provides stable support for the second rotating column 409, ensuring the stability of the second rotating column 409 during rotation, thereby ensuring the normal operation of the drive component and the cleaning component.

[0060] The workflow of the technical solution provided by this invention is as follows:

[0061] When in use, the drainage bottle 1 is in a contracted state, and its interior has a certain negative pressure suction. Then, the medical staff inserts the drainage tube 5 into the patient's wound and fixes it. Subsequently, the drainage fluid generated in the patient's liver and gallbladder will be drawn into the drainage bottle 1 through the drainage tube 5. During this process, the pressure generated by the drainage fluid can push the sealing plate 414 to overcome the elastic force of the third spring 425 and open, so that the one-way valve can be opened smoothly to complete the suction of the drainage fluid from the patient's wound.

[0062] When a patient frequently changes position during postoperative recovery, causing an increase in pressure within the drainage bottle 1, the drainage fluid in the bottle 1 will be pushed upwards and backflow due to the pressure. During this backflow, the drainage fluid will first pass through the first anti-backflow component 3. At this time, through the interaction of the first inclined flow channel 303, the first arc-shaped flow channel 302, the second inclined flow channel 305, and the second arc-shaped flow channel 304, eddies and turbulence will be generated in the first and second arc-shaped flow channels 304. These eddies and turbulence will consume the energy of the drainage fluid and increase the resistance to its flow, thereby hindering the reverse flow of the fluid and achieving the first anti-backflow of the drainage fluid. During this process, even if a small amount of drainage fluid flows from the other end of the delivery device 301, the drainage fluid will still be prevented from flowing back. When the fluid flows out from one end, the elastic force of the third spring 425 causes the sealing plate 414 to press against the top inner wall of the expansion shell 426, ensuring the sealing of the entire fixed shell 401 and preventing the drainage fluid in the drainage bottle 1 from flowing back and contaminating the wound. This achieves a second anti-backflow protection for the drainage fluid. The entire drainage device achieves two anti-backflow protections for the drainage fluid, thereby improving the backflow capacity of the drainage device. Furthermore, with the assistance of the first anti-backflow component 3, the elastic force of the third spring 425 in the second anti-backflow component 4 does not need to be too strong to achieve a seal and prevent backflow. This ensures that the sealing plate 414 can be stably squeezed open when the drainage device is used to drain different patients, thus ensuring the stability of the drainage work.

[0063] When the drainage fluid in drainage bottle 1 reaches its designated capacity, the drainage fluid is quickly discharged through drainage tube 2. Then, drainage tube 2 is resealed with the sealing cap, and sealing plug 7 is removed from exhaust tube 8. At this point, medical staff squeeze drainage bottle 1 again to deflate it, creating a negative pressure environment inside. As the medical staff squeezes drainage bottle 1, the gas inside rises and enters the fixing cover 421 and fixing cylinder 433 through the first anti-backflow component 3. When the gas pressure inside fixing cylinder 433 increases, it applies an upward lifting force to the piston inside, causing the piston and connecting column 402 to rise together. When connecting column 402 rises, it causes the toothed plate 404 on the outer circumference of connecting cylinder 403 to rise as well. The rising toothed plate 404 meshes with gear disc 405, thereby driving the gear... The wheel 405 and the first rotating column 406 rotate. During the rotation of the first rotating column 406, through a series of gear transmissions, the second gear ring 413 and the sleeve 411 can be driven to make a circular motion together. The outer circumferential wall of the sleeve 411 is fixedly connected to a scraper 412. When the sleeve 411 makes a circular motion, it can drive the scraper 412 to clean the top of the sealing sheet 414, scraping away blood clots, mucus and tissue fragments adhering to the top of the sealing sheet 414. This makes it easier for the drainage fluid to flow into the drainage bottle 1 together with the drainage fluid during subsequent drainage, ensuring the cleanliness of the surface of the sealing sheet 414. This achieves cleaning of the sealing sheet 414 while venting the drainage bottle 1, avoiding the situation where the sealing sheet 414 becomes blocked and cannot be closed, thus affecting the anti-backflow effect of the entire second anti-backflow assembly 4.

[0064] As the gas in the drainage bottle 1 rises into the fixed cover 421 and the fixed cylinder 433, the thin plate 418, which is in contact with the baffle 424 due to gravity, will be pushed upward, causing the thin plate 418 to rotate until its top presses against the bottom of the baffle ring 417. At this time, the inner wall of the fixed shell 401 can be sealed by the four sets of thin plates 418, ensuring that the rising airflow in the drainage bottle 1 enters the fixed cylinder 433 through the fixed cover 421 and acts on the piston body 429, thereby increasing the rising distance of the piston body 429, thereby increasing the driving force of the drive component, and improving the cleaning time and effect of the cleaning component.

[0065] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0066] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A postoperative drainage device for hepatobiliary surgery to prevent fluid reflux, comprising a drainage bottle, a drain tube, and a drain line, wherein the drain tube is fixedly connected to the bottom of the drainage bottle, characterized in that, An exhaust pipe is fixedly connected to the top of the drainage bottle, a connecting strap is fixedly connected to the outer circumference of the drainage bottle, and a sealing plug is fixedly connected to one end of the connecting strap. The sealing plug cooperates with the exhaust pipe. The top of the drainage bottle is provided with a first anti-backflow component and a second anti-backflow component. The first anti-backflow component is connected to the second anti-backflow component, and the second anti-backflow component is disposed at one end of the drainage tube. The second anti-backflow component is internally equipped with a cleaning component to prevent clogging and a drive component to provide power to the cleaning component; The drive component uses vertical motion to cause the cleaning component to perform circular motion to clean the inside of the second anti-backflow component; The first anti-backflow assembly includes a conveyor fixedly connected to the top of the drainage bottle. The second anti-backflow assembly includes a fixed shell fixedly connected to one end of the conveyor. An expansion shell is provided on the outer circumferential wall of the fixed shell. A baffle plate is fixedly connected to the inner circumferential wall of the expansion shell. A third spring is fixedly connected to the outer side of the baffle plate. A sealing plate is fixedly connected to the top of the third spring. A fixed cylinder is fixedly connected to the bottom outer wall of the sealing plate. A piston body is provided inside the fixed cylinder. A connecting column is fixedly connected to the top outer wall of the piston body. The drive assembly includes a connecting cylinder fixedly connected to the outer circumferential wall of the connecting column, a toothed plate fixedly connected to the outer circumferential wall of the connecting cylinder, a gear disk meshing on one side of the toothed plate, a first rotating column fixedly connected to the inner circumferential wall of the gear disk, a second helical gear fixedly connected to the outer circumferential wall of the first rotating column, a first helical gear meshing with the outer circumferential wall of the second helical gear, a second rotating column fixedly connected to the inner circumferential wall of the first helical gear, a first gear ring frame fixedly connected to the outer circumferential wall of the second rotating column, and a second gear ring frame meshing with the outer circumferential wall of the first gear ring frame. The cleaning assembly includes a crossbar fixedly connected to the inner circumference of the fixed housing, one end of the crossbar being rotatably connected to a sleeve, a second gear ring fixedly connected to the outer circumference of the sleeve, and a scraper fixedly connected to the outer circumference of the sleeve, the bottom of the scraper contacting the top of the sealing sheet.

2. The postoperative drainage device for preventing fluid reflux in hepatobiliary surgery according to claim 1, characterized in that, The conveyor is provided with a first arc-shaped flow channel, a first oblique flow channel, a second arc-shaped flow channel and a second oblique flow channel. The first arc-shaped flow channel, the first oblique flow channel, the second arc-shaped flow channel and the second oblique flow channel are all interconnected. The first arc-shaped flow channel and the second arc-shaped flow channel, as well as the first oblique flow channel and the second oblique flow channel, are all staggered at equal distances on the left and right sides inside the conveyor.

3. The postoperative drainage device for preventing fluid reflux in hepatobiliary surgery according to claim 2, characterized in that, One end of the fixed shell is provided with a connecting pipe, which is threadedly connected to the drainage pipe. The top of the sealing sheet abuts against the top inner wall of the expansion shell. A positioning plate is fixedly connected to the inner circumference of the fixed shell, and one end of the fixed cylinder passes through the positioning plate.

4. The postoperative drainage device for preventing fluid reflux in hepatobiliary surgery according to claim 3, characterized in that, The top outer wall of the sealing sheet is provided with a drainage groove, and the cross-section of the drainage groove is W-shaped.

5. The postoperative drainage device for preventing fluid reflux in hepatobiliary surgery according to claim 3, characterized in that, A fixed cover is fixedly connected to the bottom end of the fixed cylinder. Rotating seats that are evenly spaced and circularly distributed are fixedly connected to the inner circumference of the fixed cover. A rotating block is rotatably connected to the inner wall of the rotating seat. A thin plate is fixedly connected to one end of the rotating block. There are four sets of thin plates, and the four sets of thin plates form a circular plate.

6. The postoperative drainage device for preventing fluid reflux in hepatobiliary surgery according to claim 5, characterized in that, A retaining ring is fixedly connected to the inner circumference of the fixed shell. The cross-section of the retaining ring is a right-angled triangle. A second spring is fixedly connected to the inner circumference of the fixed shell. A stop bar is fixedly connected to the end of the second spring away from the fixed shell. The cross-section of the stop bar is arc-shaped.

7. The postoperative drainage device for preventing fluid reflux in hepatobiliary surgery according to claim 6, characterized in that, The piston body has an installation groove on its outer circumference, and a sealing ring is installed in the installation groove. One end of the connecting column passes through the fixed cylinder and the sealing plate. A first spring is fixedly connected to the top outer wall of the piston body, and the end of the first spring away from the piston body is fixedly connected to the top inner wall of the fixed cylinder.

8. The postoperative drainage device for preventing fluid reflux in hepatobiliary surgery according to claim 1, characterized in that, A fixing frame is fixedly connected to the inner circumferential wall of the fixed shell, and the fixing frame is rotatably connected to the second rotating column.

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