A closed irrigation and drainage device for the treatment of deep wound infections

Abstract

This invention relates to the field of medical device technology, specifically to a closed irrigation and drainage device for treating deep wound infections. The device includes a drainage tube, an inlet tube, an outlet tube, a front T-joint, a rear T-joint, a sealing cap, a guide wire, and a flow regulator. The drainage tube has several drainage holes for fluid exchange. The guide wire is sleeved inside the drainage tube. The front and rear T-joints are located at opposite ends of the drainage tube, with the guide wire extending from the outer openings of the front and rear T-joints respectively. The sealing caps seal the outer openings of the front and rear T-joints. The inlet tube is connected to the inner opening of the front T-joint, allowing cleaning fluid to be injected into its other end. The outlet tube is connected to the inner opening of the rear T-joint, discharging drainage fluid from its other end. The flow regulator is installed at the distal end of the inlet tube. By incorporating a guide wire with a ring structure within the drainage tube, convenient and repeated unblocking of the pipe is achieved, effectively solving the problem of pipe blockage.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a closed irrigation and drainage device for treating deep wound infections. Background Technology

[0002] In today's society, the incidence of high-energy physical injuries is on the rise, especially in the field of orthopedics, where complex open fractures and soft tissue defects are becoming increasingly common. These severe traumas are often accompanied by a high risk of contamination and infection, with bacteria easily invading deep into tissues and contaminating bone tissue, necrotic tissue, and internal fixation materials. Despite routine debridement and systemic antibiotic treatment, a large number of bacteria stubbornly adhere to bone tissue and internal fixation materials, leading to difficult-to-treat conditions such as chronic osteomyelitis.

[0003] Currently, commonly used drainage devices in clinical practice mainly include unidirectional drainage and unidirectional negative pressure drainage. However, these devices are prone to problems such as poor drainage and retrograde infection. Traditional parallel-placed double-tube drainage, while achieving drainage and irrigation functions to some extent, has several shortcomings: excessive fluid entering the interstitial space can easily create excessive net water pressure, leading to significant leakage from the inlet tube and hindering effective irrigation; simultaneously, the drainage tube is easily blocked by tendons, fascia, or necrotic tissue, causing poor drainage. Furthermore, existing drainage tubes have a single function, only providing drainage, and long-term use can easily lead to tube blockage and debris accumulation, affecting nursing efficiency.

[0004] To address the aforementioned issues, a novel drainage device is urgently needed that can achieve continuous closed irrigation while maintaining unobstructed drainage, high antibiotic concentrations, and promoting the diffusion of exudate. Simultaneously, patient comfort during long-term treatment must be considered to avoid the suffering caused by prolonged bed rest. Therefore, developing a closed irrigation and drainage device that meets these requirements has significant clinical importance and practical value. Summary of the Invention

[0005] In view of the many shortcomings of existing parallel-placed dual-tube drainage systems in terms of drainage efficiency, antibiotic concentration maintenance, anti-clogging, power controllability, backflow prevention, and patient comfort, the purpose of this invention is to provide a closed irrigation and drainage device for treating deep wound infections that is compact in structure, integrated in function, easy to operate, and reliable in effect.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a closed irrigation and drainage device for treating deep wound infections, comprising a drainage tube, an inlet tube, an outlet tube, a front tee tube, a rear tee tube, a sealing cap, a guide wire, and a flow regulator. The drainage tube has several drainage holes for fluid exchange. The guide wire is sleeved inside the drainage tube. The front and rear tee tubes are respectively located at both ends of the drainage tube. The two ends of the guide wire extend from the outer openings of the front and rear tee tubes, respectively. The sealing caps respectively seal the outer openings of the front and rear tee tubes. The inlet tube is connected to the inner opening of the front tee tube, and a cleaning solution is injected into the other end. The outlet tube is connected to the inner opening of the rear tee tube, and drainage fluid is discharged from the other end. The flow regulator is installed at the distal end of the inlet tube.

[0007] The aforementioned closed irrigation and drainage device for treating deep wound infections includes a guidewire comprising a wire body, a pull ring, and a cleaning head. The pull ring and the cleaning head are respectively disposed at both ends of the wire body. The diameter of the cleaning head is not greater than the inner diameter of the drainage tube. When the pull ring is pulled, the cleaning head moves towards one end of the pull ring within the drainage tube.

[0008] The aforementioned closed irrigation and drainage device for treating deep wound infections has drainage holes that are longitudinally elliptical and are evenly distributed in a small and dense manner along the circumference of the drainage tube. Axially adjacent drainage holes are staggered, and the long axis of the drainage holes is set along the axial direction of the drainage tube.

[0009] In the aforementioned closed irrigation and drainage device for treating deep wound infections, a section of rubber hose is provided in the middle of the inlet tube. When the irrigation fluid flows, the rubber hose is squeezed, and the irrigation fluid enters the drainage tube in a pulse manner.

[0010] The aforementioned closed irrigation and drainage device for treating deep wound infections has a peristaltic pump at the distal end of the outlet tube, and the peristaltic pump adopts a unidirectional magnetic drive structure.

[0011] The aforementioned closed irrigation and drainage device for treating deep wound infections further includes a control component. The control component includes a housing, an irrigation fluid container, a drainage fluid container, and a power supply. A mounting base is provided inside the housing, and a mounting hole is provided at the front end of the housing. The irrigation fluid container and the drainage fluid container are mounted together on the mounting base. The inlet pipe and the outlet pipe pass through the mounting hole and are respectively connected to the irrigation fluid container and the drainage fluid container. The peristaltic pump is fixed inside the housing, and the power supply is electrically connected to the peristaltic pump.

[0012] The aforementioned closed irrigation and drainage device for treating deep wound infections uses a lithium battery and / or an AC power outlet as its power source.

[0013] The beneficial effects of this invention, a closed irrigation and drainage device for treating deep wound infections, are as follows: By employing a single-tube, multi-microporous flexible tube structure, the irrigation fluid can be evenly dispersed and applied to the lesion area, effectively preventing fluid infiltration into the interstitial spaces, significantly improving drainage efficiency, maintaining local antibiotic concentration, and enhancing anti-infection effects. The use of a magnetically driven peristaltic pump enables unidirectional, closed, and controllable fluid flow, providing stable and adjustable drainage power, solving the problem of unstable gravity drainage, and effectively preventing backflow and reducing the risk of secondary infection. The integrated power module containing a lithium battery ensures portability and patient freedom of movement in environments without external power, reducing complications caused by prolonged bed rest. The inclusion of a guidewire with a ring structure within the drainage tube allows for convenient and repeated unblocking of the tube, effectively solving the problem of tube blockage and significantly reducing nursing burden and patient suffering. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the control component structure of the present invention; Figure 3 This is a schematic diagram of the rubber hose structure of the present invention; Figure 4 This is a schematic diagram of the flushing structure of the present invention; Figure 5 This is a schematic diagram of the guidewire structure of the present invention; Figure 6 This is a schematic diagram of the drainage tube structure of the present invention.

[0015] Explanation of reference numerals in the attached drawings: Drainage tube 10, drainage hole 11, inlet tube 20, rubber hose 21, outlet tube 30, front tee tube 40, inner port 41, outer port 42, rear tee tube 50, sealing cap 60, guide wire 70, wire body 71, pull ring 72, cleaning head 73, peristaltic pump 80, control assembly 90, housing 91, irrigation fluid container 92, drainage fluid container 93, inflamed tissue 100. Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be described below in conjunction with specific embodiments and accompanying drawings.

[0017] Example 1 In clinical medicine, irrigation and drainage of wounds or body cavities are important treatment methods for controlling infection and promoting healing. Currently, the most common irrigation and drainage method employs a two-tube parallel drainage system. This involves injecting irrigation fluid (such as antibiotic saline) into the lesion area through one inlet tube, while simultaneously draining the irrigated fluid out through the other outlet tube. However, this two-tube design presents several problems in practical applications.

[0018] In existing technologies, excessive fluid entering the interstitial spaces leads to poor drainage. Because the two tubes are placed side-by-side, the irrigation fluid tends to seep into the surrounding interstitial spaces along the gaps between the tubes and the tissue during injection, rather than directly targeting the lesion area. This causes a large amount of fluid to accumulate in the interstitial spaces, forming local edema and increasing the net water pressure in the interstitial spaces. High net water pressure not only compresses surrounding blood vessels and nerves, affecting tissue blood supply, but also makes it difficult for subsequently injected irrigation fluid to effectively enter the lesion area, resulting in low drainage efficiency or even complete blockage.

[0019] Secondly, existing irrigation and drainage methods struggle to maintain high antibiotic concentrations. In dual-tube drainage systems, fluid stagnation in the interstitial spaces leads to significant dilution of the antibiotic saline solution, causing a rapid decline in local antibiotic concentration. Simultaneously, poor drainage prevents the timely removal of mixed exudate and irrigation fluid, further reducing the effective antibiotic concentration. This makes it difficult for antibiotics to reach the necessary concentration threshold for bactericidal or bacteriostatic effects locally, thus weakening the anti-infective effect and prolonging the treatment cycle.

[0020] Third, the existing flushing and drainage tubes suffer from significant clogging problems. Most existing drainage tubes are made of ordinary silicone or plastic, with smooth inner walls but lacking anti-clogging design. Over long-term use, blood, pus, tissue fragments, etc., easily accumulate inside the tubes, forming blockages and causing drainage interruption. Medical staff need to frequently replace the tubes or manually clear them, increasing the nursing burden and patient suffering.

[0021] Fourth, existing flushing and drainage methods suffer from insufficient and uncontrollable drainage power. Traditional drainage methods largely rely on gravity-based natural drainage, which involves placing the end of the drainage tube in a low position and allowing the fluid to drain by its own weight. This method is greatly affected by factors such as patient position and tube height difference, resulting in unstable drainage speeds that are difficult to precisely adjust according to treatment needs. In particular, drainage may stop completely when the patient moves or turns over, leading to fluid accumulation in the body and increasing the risk of infection.

[0022] Fifth, existing irrigation and drainage systems pose a high risk of backflow. In dual-tube systems, the inlet and outlet tubes are typically independent, lacking an effective backflow prevention mechanism. When the patient's position changes or the drainage tube is compressed, the drained fluid may flow back into the body along the outlet tube, introducing external bacteria and causing secondary infection. Furthermore, the dual-tube design complicates tubing connections, increasing the likelihood of operational errors.

[0023] Sixth, existing irrigation and drainage systems restrict patient mobility. Because dual-tube systems require separate connections to the inlet and outlet water devices and typically rely on external power or gravity drainage, patients often need to remain in bed for extended periods or maintain a fixed position, unable to move freely. This not only increases patient suffering and psychological stress but can also lead to complications such as bedsores and muscle atrophy.

[0024] In summary, existing parallel-positioned dual-tube drainage systems have significant shortcomings in terms of drainage efficiency, antibiotic concentration maintenance, anti-clogging, power controllability, backflow prevention, and patient comfort. This embodiment addresses these issues by proposing a closed irrigation and drainage device for treating deep wound infections.

[0025] like Figures 1-6 As shown, a closed irrigation and drainage device for treating deep wound infections includes a drainage tube 10, an inlet tube 20, an outlet tube 30, a front tee tube 40, a rear tee tube 50, a sealing cap 60, a guide wire 70, and a flow regulator. The arrows in the figure indicate the direction of liquid flow.

[0026] The drainage tube is inserted into the inflamed tissue 100. It adopts a single tube multi-micropore flexible tube structure. The tube body is provided with several drainage holes 11 for fluid exchange. The drainage holes are longitudinally elliptical holes. The drainage holes are small and densely and evenly distributed along the circumference of the drainage tube. The axially adjacent drainage holes are staggered. The long axis of the drainage holes is set along the axial direction of the drainage tube.

[0027] This structural design allows the irrigation fluid to act evenly and dispersedly on the lesion area through micropores, avoiding interstitial leakage and local edema caused by concentrated fluid injection, thereby significantly improving drainage efficiency and maintaining local antibiotic concentration.

[0028] The front tee and the rear tee are respectively set at both ends of the drainage pipe. The inlet pipe is connected to the inner port 41 of the front tee, and the outlet pipe is connected to the inner port of the rear tee. The sealing caps respectively seal the outer ports 42 of the front tee and the rear tee.

[0029] The inlet pipe adopts an interrupted expansion structure. A section of rubber hose 21 is set in the middle of the inlet pipe. One end of the hose is connected to the drainage pipe through a front tee pipe, and the other end is interrupted to allow the cleaning fluid to be injected. This structure helps to form a stable seal and fluid channel when connected. When the flushing fluid flows, it squeezes the rubber hose, and the flushing fluid enters the drainage pipe in a pulse manner.

[0030] The outlet tube is connected to the other end of the drainage tube via a rear T-connector, and a peristaltic pump 80 is installed at the distal end of the outlet tube to discharge the drainage fluid. The peristaltic pump adopts a magnetic drive structure, which can realize unidirectional, closed, and controllable flow of liquid. It not only provides stable and adjustable drainage power, solving the problem of instability of gravity drainage, but also effectively prevents backflow of liquid through its unidirectional flow characteristics, reducing the risk of secondary infection.

[0031] The guide wire is fitted inside the drainage tube. The two ends of the guide wire are led out from the outer openings of the front tee and the rear tee, respectively. The guide wire includes a wire body 71, a pull ring 72, and a cleaning head 73. The pull ring and the cleaning head are respectively located at the two ends of the wire body. The diameter of the cleaning head is not greater than the inner diameter of the drainage tube. Pulling the pull ring moves the cleaning head towards the pull ring end inside the drainage tube. The cleaning head can adopt a ring structure or an expansion head structure.

[0032] The guidewire is made of a tough metal material, with both ends free and protected by sterile caps on a three-way connector. A ring structure at one end of the guidewire allows for easy connection of a new guidewire during withdrawal, enabling repeated unblocking. The cleaning head also helps remove obstructing tissue, effectively solving the problem of tubal blockage and reducing the burden of nursing care.

[0033] The flow regulator is installed on the inlet pipe, located at the front of the rubber hose. It adopts a rotary structure and achieves precise control of the flushing fluid flow rate by rotating and adjusting the valve opening.

[0034] Furthermore, the closed irrigation and drainage device also includes a control component 90, which includes a housing 91, an irrigation fluid container 92, a drainage fluid container 93, and a power supply. A mounting base is provided inside the housing, and a mounting hole is provided at the front end of the housing. The irrigation fluid container and the drainage fluid container are mounted together on the mounting base. The inlet pipe and the outlet pipe pass through the mounting hole and are connected to the irrigation fluid container and the drainage fluid container respectively. The peristaltic pump is fixed inside the housing, and the power supply is electrically connected to the peristaltic pump. The power supply uses a lithium battery and / or an AC power socket. The lithium battery can directly power the peristaltic pump, ensuring the portability of the device and the patient's freedom of movement in the absence of an external power source, while the AC power socket provides the option of continuous power supply.

[0035] In the current technology, wound closure negative pressure drainage (VAC) and VSD techniques are also used in the treatment of limb infections for wounds and deep infections. However, the main drawback of this method is that after removal, a second surgery is often required to close the body cavity occupied by the porous dressing. At the same time, it is not possible to continuously apply antibiotics locally. Moreover, due to the lack of a continuous relationship, blockage often occurs, and a second surgery is required to replace it in about one week, which aggravates the patient's pain.

[0036] Compared to existing irrigation and drainage methods, the device described in this embodiment allows for a more efficient approach. After treatment, under sterile conditions, the proximal irrigation tube is strictly disinfected at its entry point into the skin. The guidewire is then removed, and the tube is pulled out distally from the proximal end, close to the proximal irrigation tube. A sterile dressing is applied, eliminating the need for surgical wound closure. After treatment, once the patient's local inflammatory symptoms and laboratory tests show significant improvement, the tube can be directly cut proximal after disinfection and pulled out in the correct direction. This eliminates the need for secondary removal, reducing patient discomfort.

[0037] Example 2 Based on Example 1, this embodiment sets specific parameters for a closed irrigation and drainage device for treating deep wound infections.

[0038] First, prepare the closed irrigation and drainage device. The core component is the drainage tube, which adopts a single-tube, multi-micropore flexible tube structure made of biocompatible materials such as medical-grade silicone or polyurethane. The drainage tube has a diameter of 3 mm and a wall thickness of 0.5 mm to ensure sufficient flexibility and support for easy placement within the body cavity. Multiple micropores are evenly distributed circumferentially on the wall of the drainage tube. In this embodiment, the micropores are elliptical in shape, with a minor axis of 1 mm and a major axis of 3 mm, and the major axis of all micropores is parallel to the axial direction of the drainage tube body. These elliptical micropores are staggered on the tube wall, with a spacing of approximately 1 mm between adjacent micropores. This specific pore shape and distribution pattern is designed to allow the irrigation fluid to be sprayed out from the sidewall of the tube body in a fine, uniform, and dispersed jet form, thereby maximizing the contact area between the irrigation fluid and the lesion tissue and avoiding high-pressure impact at a single location, effectively preventing fluid leakage along the gap between the tube and the tissue.

[0039] Next, the device is assembled and connected. One end of the drainage tube is connected to the inlet tube via a pluggable tee connector. The inlet tube employs an interrupted expansion structure; specifically, one end connecting to the drainage tube body has a standard Luer connector, while the other end is designed as an abruptly enlarged section. This structure facilitates quick and secure insertion into the interface of an external flushing fluid bag or syringe, forming a reliable seal to prevent leakage. The other end of the drainage tube is connected to the outlet tube via another pluggable tee connector. Inside the outlet tube, a miniature peristaltic pump is integrated. The peristaltic pump uses a magnetic drive structure, mainly consisting of an external magnetic stator and a magnetic rotor encased in the outlet tube tubing. The air gap between the stator and rotor is designed to be 1 mm. When the control system drives the rotor to rotate, its magnetic rollers periodically squeeze the outlet tube tubing, generating a unidirectional, sealed pushing force that continuously pumps the liquid out of the tube. This design not only provides stable and controllable active drainage power, but its one-way valve effect also completely eliminates the possibility of liquid backflow.

[0040] Next, the control system is configured and connected. The control system includes a flow regulator and a power module. The flow regulator, employing a precision rotary design, is installed on the inlet line. By rotating its adjustment knob clockwise or counterclockwise, the valve opening can be linearly changed, thus achieving precise control of the flushing fluid inflow rate, ranging from dripping to rapid flushing. The power module contains a rechargeable lithium battery and an AC power outlet. The lithium battery is directly connected to the peristaltic pump's motor circuitry, providing portable power and allowing the patient to move freely with the device. When used at the bedside, it can also be connected to AC mains power to charge the lithium battery or directly power the device, ensuring stable operation over extended periods.

[0041] Finally, an anti-clogging guidewire system is inserted and utilized. A guidewire is pre-installed inside the lumen of the drainage tube. This guidewire is made of tough and appropriately flexible stainless steel, with a diameter of 0.3 mm and a length of 80 mm. The guidewire is completely contained within the drainage tube, with its two ends extending from T-junctions at both ends of the tube. One port of each T-junction connects to the inlet and outlet tubes, respectively, while the other port is sealed with a sterile cap. The "free" ends of the guidewire are protected under these sterile caps, maintaining the sterility of the entire system. At the end of the guidewire located in the inlet (or outlet) tube, there is a small annular structure. If poor drainage is suspected and tube blockage is suspected, medical personnel can, under aseptic conditions, open the corresponding sterile cap and hook the hook-like structure at the tip of a new guidewire into this annular structure. Then, the old guidewire is slowly withdrawn, and the new guidewire is brought into the lumen, completing the guidewire replacement. During this process, the ring structure acts like an "anchor," carrying away tiny tissue fragments, blood clots, and other debris attached to the old guidewire or clogging the tube opening, thus clearing the blockage. This operation can be repeated without replacing the entire drainage tube.

[0042] The above implementation scheme provides a highly integrated closed irrigation and drainage device. Its single-tube, multi-micropore structure achieves uniform dispersion of the irrigation fluid, reducing interstitial edema at its source. The built-in magnetically driven peristaltic pump provides stable, adjustable, and backflow-proof active drainage power. The portable power supply design enhances patient comfort and freedom of movement. The unique replaceable guidewire mechanism effectively prevents and solves the problem of lumen blockage, significantly reducing the complexity of nursing procedures and patient discomfort. This device is particularly suitable for clinical scenarios requiring continuous irrigation and drainage, such as deep abscesses and postoperative infected cavities.

[0043] Example 3 This embodiment describes another implementation scheme based on Embodiment 1.

[0044] First, the drainage tube of the closed irrigation and drainage device was prepared. In this embodiment, the drainage tube also adopts a single-tube multi-micropore flexible tube structure, but the specific parameters are adjusted to suit narrower body cavities. The tube material is made of highly flexible medical silicone, with a diameter of 2.8 mm and a wall thickness of 0.5 mm. While maintaining the necessary drainage channel, the outer diameter is further reduced, decreasing pressure and irritation to surrounding tissues. The micropore design on the tube wall is similar to that in Embodiment 2, being elliptical (short diameter 1 mm, long diameter 3 mm), with the long axis along the tube axis and maintaining a uniform distribution of staggered pore spacing of approximately 1 mm. This fine micropore layout ensures that even under low-flow irrigation, the medication can form a broad and gentle coverage of the lesion area, optimizing the maintenance of local antibiotic concentration.

[0045] Next, the various modules of the device are connected. One end of the drainage tube is securely connected to the inlet tube via a quick-release pluggable tee connector. In this embodiment, the "interruption expansion structure" of the inlet tube is manifested as a funnel-shaped enlarged interface at its end, which can be snapped into a standard infusion set port, accompanied by a distinct "click" feel during operation, ensuring a tight and accurate connection. The other end of the drainage tube is connected to the outlet tube in the same manner. The middle section of the outlet tube is a specially designed elastic pump tube, the outer wall of which is tightly fitted to the magnetic rotor of the peristaltic pump. The working gap between the magnetic stator and rotor of the peristaltic pump is set to 2 mm. This gap is optimized to ensure sufficient magnetic transmission force while reducing energy loss and heat generation. After the peristaltic pump starts, multiple pressure rollers on its rotor sequentially roll the pump tube, generating a wave-like squeezing force that propels the liquid forward, thereby achieving a completely closed unidirectional flow of liquid from the inlet tube to the outlet tube.

[0046] Next, the control system is installed and configured. In this embodiment, the flow regulator is integrated into a handheld control box, employing a digital rotary encoder. When the knob is rotated, the LCD screen on the box displays the set flow rate value (e.g., ml / hour) in real time. The control signal is transmitted via cable to the proportional solenoid valve in the inlet passage, achieving high-precision digital control of the flow rate. The power module is also integrated into the control box, equipped with a high-capacity lithium battery that can be charged via the Micro-USB port on the side of the box or directly powered by the included AC adapter. The control box features a back clip for attachment to the patient's clothing or bed rail for convenient operation and observation.

[0047] Finally, the anti-clogging guidewire system is deployed. In this embodiment, the pre-installed guidewire is 90 mm long, made of nickel-titanium alloy, and possesses both superelasticity and shape memory properties, with a diameter of 0.3 mm. The guidewire is placed inside the drainage tube cavity, with its two ends extending from the T-junction at the connection between the inlet and outlet tubes, respectively, and sealed with a sterile screw cap. A distinct annular structure is located at the outlet tube end of the guidewire. When unblocking is required, medical personnel first turn off the peristaltic pump. Then, under aseptic conditions, the sterile screw cap of the outlet tube T-junction is opened, and the thin hook at the tip of a spare guidewire is threaded through the annular structure and secured. At this point, the old guidewire is slowly and smoothly pulled outwards, and the new guidewire, pulled by the old guidewire, is guided along the same path into the drainage tube cavity until the annular end of the new guidewire reaches the original position of the old guidewire. The replaced old guidewire may have adhering blockages; the annular structure scrapes the tube wall as it passes through the micropores, helping to remove these deposits. This "guidewire exchange" procedure is quick, minimally invasive, and can rapidly restore drainage patency.

[0048] The above implementation demonstrates a closed irrigation and drainage device with alternative parameter configurations. Its finer tube diameter is suitable for delicate anatomical sites; digital flow control provides more precise treatment management; and the nickel-titanium alloy guidewire offers improved permeability and safety. This embodiment further enhances the device's comprehensive advantages in improving drainage efficiency, maintaining local drug concentration, achieving controllable active drainage, and conveniently managing blockages, demonstrating the adaptability and effectiveness of the invention under different clinical needs.

[0049] The above embodiments are merely illustrative of the structural concept and features of the present invention, intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made based on the essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A closed irrigation and drainage device for treating deep wound infections, characterized in that: The device includes a drainage tube, an inlet tube, an outlet tube, a front tee tube, a rear tee tube, a sealing cap, a guide wire, and a flow regulator. The drainage tube has several drainage holes for fluid exchange. The guide wire is sleeved inside the drainage tube. The front and rear tee tubes are respectively located at both ends of the drainage tube, with the two ends of the guide wire leading out from the outer openings of the front and rear tee tubes, respectively. The sealing caps respectively block the outer openings of the front and rear tee tubes. The inlet tube is connected to the inner opening of the front tee tube, and cleaning fluid is injected into the other end. The outlet tube is connected to the inner opening of the rear tee tube, and drainage fluid is discharged from the other end. The flow regulator is installed at the distal end of the inlet tube.

2. The closed irrigation and drainage device for treating deep wound infections according to claim 1, characterized in that: The guidewire includes a wire body, a pull ring, and a cleaning head. The pull ring and the cleaning head are respectively located at both ends of the wire body. The diameter of the cleaning head is not greater than the inner diameter of the drainage tube. When the pull ring is pulled, the cleaning head moves towards one end of the pull ring inside the drainage tube.

3. The closed irrigation and drainage device for treating deep wound infections according to claim 1, characterized in that: The drainage holes are longitudinally elliptical holes, and the drainage holes are small and densely and evenly distributed along the circumference of the drainage tube. The axially adjacent drainage holes are staggered, and the long axis of the drainage holes is set along the axial direction of the drainage tube.

4. The closed irrigation and drainage device for treating deep wound infections according to claim 1, characterized in that: A section of rubber hose is installed in the middle of the inlet pipe. When the flushing fluid flows, the rubber hose is squeezed, and the flushing fluid enters the drainage pipe in a pulse manner.

5. The closed irrigation and drainage device for treating deep wound infections according to claim 1, characterized in that: A peristaltic pump is installed at the distal end of the liquid outlet pipe, and the peristaltic pump adopts a unidirectional magnetic drive structure.

6. The closed irrigation and drainage device for treating deep wound infections according to claim 5, characterized in that: The closed flushing and drainage device also includes a control component, which includes a housing, a flushing fluid container, a drainage fluid container, and a power supply. A fixing base is provided inside the housing, and an installation hole is provided at the front end of the housing. The flushing fluid container and the drainage fluid container are mounted together on the fixing base. The inlet pipe and the outlet pipe pass through the installation hole and are respectively connected to the flushing fluid container and the drainage fluid container. The peristaltic pump is fixed inside the housing, and the power supply is electrically connected to the peristaltic pump.

7. The closed irrigation and drainage device for treating deep wound infections according to claim 6, characterized in that: The power source uses a lithium battery and / or an AC power outlet.

Images