Medical puncture catheter for child bone and joint infection treatment

Abstract

The invention discloses a medical puncture catheter for children bone and joint infection treatment, which is characterized in that a circulating mixing tube provided with a puncture catheter main body comprises a first bag body and a second bag body, a flushing tube is connected with the head end of the first bag body, a drainage tube is connected with the head end of the second bag body, a first flushing valve is arranged on the flushing tube, and a first drainage valve is arranged on the drainage tube; the puncture needle is connected with a three-way pipe through a hose, a second separating valve is arranged on the hose, the other two ends of the three-way pipe are connected with the tail ends of a first bag body and a second bag body through hoses respectively, the tail ends of the first bag body and the second bag body are provided with a second flushing valve and a second drainage valve respectively, and the head ends of the first bag body and the second bag body are connected through a connecting pipe. A first separating valve is arranged at the connecting pipe; the pump assembly comprises a peristaltic pump for driving liquid in the first bag body and the second bag body to flow; the flushing pipe is connected with a liquid medicine bag, and the drainage pipe is connected with a drainage bag. The fixing assembly is used for fixing the position of the puncture needle; the early warning device is used for real-time monitoring and early warning.

Description

Technical Field

[0001] This invention relates to the field of pediatric medical device technology, and in particular to a medical puncture catheter for the treatment of bone and joint infections in children. Background Technology

[0002] Bone and joint infections are common emergencies in pediatric orthopedics, often caused by pathogens such as Staphylococcus aureus. If left untreated, they can lead to osteonecrosis and joint deformities. In clinical practice, the puncture catheter is a core treatment device, responsible for delivering irrigation fluid to remove pathogens and dilute inflammatory factors, as well as draining pus to relieve tissue pressure. Its design and safety directly affect the treatment outcome.

[0003] However, existing puncture catheters are mostly developed based on adult needs and do not take into account the physiological characteristics of children, such as delicate skin, fragile cartilage, and high joint mobility, which have obvious shortcomings.

[0004] First, flushing and drainage are inefficient and unsafe. The injected flushing fluid mixes with pus and remains trapped, resulting in incomplete removal of pathogens; frequent switching of operating modes increases the risk of contamination, and repeated adjustments of the catheter can easily damage children's osteochondral bone.

[0005] Secondly, traditional irrigation often relies on a single pump or manual control, which makes it difficult to accurately match the tissue tolerance of children. The amount of irrigation fluid delivered is difficult to match with the amount of drainage fluid discharged. Due to the small size of children, the local tissue pressure may increase due to the rapid injection of irrigation fluid or the untimely drainage, which may cause periosteal irritation and joint cavity damage in children.

[0006] Secondly, children are active and their movements can easily cause the catheter to shift and pull, leading to the needle falling out.

[0007] Third, it lacks early warning capabilities. It cannot capture inflammatory factor signals when the infection worsens, nor can it detect catheter rupture, which can easily delay treatment or lead to secondary infections.

[0008] Fourth, it cannot be continuously flushed. In the traditional single-pump single-channel design, if it is necessary to replenish the medicine or clean the drainage tube, the entire flushing process must be stopped, which cannot achieve long-term, low-dose, continuous and stable flushing.

[0009] In summary, existing catheters are insufficient to meet the treatment needs, treatment efficiency, comfort, and early warning functions of children. Summary of the Invention

[0010] The purpose of this invention is to provide a medical puncture catheter for the treatment of bone and joint infections in children, in order to solve the problems existing in the background art.

[0011] To achieve the above objectives, the present invention provides the following technical solution:

[0012] A medical puncture catheter for the treatment of bone and joint infections in children includes a puncture catheter body, a fixation assembly, a valve assembly, a pump assembly, an early warning device, and a controller;

[0013] The main body of the puncture catheter includes an irrigation tube, a drainage tube, a circulating mixing tube, a puncture needle, a medication bag, and a drainage bag; the valve assembly includes a first irrigation valve, a second irrigation valve, a first drainage valve, a second drainage valve, a first separating valve, and a second separating valve; the circulating mixing tube includes a first bladder, a second bladder, a connecting tube, and a three-way valve; the irrigation tube is connected to the first end of the first bladder, and the drainage tube is connected to the first end of the second bladder; the irrigation tube is equipped with the first irrigation valve, and the drainage tube is equipped with the first drainage valve; the puncture needle is connected to the three-way valve via a flexible tube; the flexible tube connecting the puncture needle to the three-way valve is equipped with the second separating valve; the other two ends of the three-way valve are respectively connected to the tail ends of the first bladder and the second bladder via flexible tubes; the first bladder and the second bladder... The tail end of the sac is provided with a second flushing valve and a second drainage valve, respectively. The adjacent sides of the head ends of the first sac and the second sac are connected by the connecting tube, and the connecting tube is provided with the first separating valve. All valves in the valve assembly are electrically controlled valves, and each valve is electrically connected to the controller. The pump assembly includes a peristaltic pump, which drives the liquid in the first sac to flow from the head end to the tail end, and drives the liquid in the second sac to flow from the tail end to the head end. The peristaltic pump is electrically connected to the controller. The flushing tube is connected to the drug bag at its end, and the drainage tube is connected to the drainage bag at its end. The fixing assembly is used to fix the position of the puncture needle. The early warning device is used to monitor the changes in inflammation of the child's infection focus and the structural integrity of the puncture catheter body in real time.

[0014] Furthermore, the fixing component includes a malleable base, an elastic cushioning fixing band, and a needle protection cap; the bottom of the malleable base is adhered with a hypoallergenic adhesive layer for attaching to the skin surface at the puncture site, the malleable base has a cutout in the middle to expose the puncture site, the elastic cushioning fixing band has a first Velcro in the middle and is detachably connected to both sides of the malleable base, the elastic cushioning fixing band is used to fix the position of the puncture needle; one end of the needle protection cap is connected to the malleable base via a fabric strip, the needle protection cap can fasten the puncture needle, and the end of the needle protection cap has a second Velcro, when the needle protection cap fastens the puncture needle, the second Velcro is attached to the first Velcro.

[0015] Furthermore, the early warning device includes an inflammation monitoring submodule and a structural integrity monitoring submodule;

[0016] The inflammation monitoring submodule includes a miniature electrochemical sensor, a signal processing unit, and a detection syringe. A connection port is located on one side of the second capsule, and the needle of the detection syringe is connected to this port. The detection syringe is equipped with an electromagnetic push rod for driving the syringe push rod. The miniature electrochemical sensor is located inside the detection syringe. The signal processing unit is electrically connected to the miniature electrochemical sensor. The signal processing unit converts the analog signals collected by the miniature electrochemical sensor into digital signals and transmits them to the controller. Liquid can be periodically extracted to collect signals of inflammatory factors such as C-reactive protein and procalcitonin in the tissue surrounding the infection site. When the level of inflammatory factor signals reaches a threshold, an alarm is triggered, and the medication solution is replaced.

[0017] Furthermore, the structural integrity monitoring submodule includes conductive fibers and a circuit detection unit. The conductive fibers are embedded along the main body of the puncture catheter. Electronic energy storage is provided at the connection points of each component of the puncture catheter main body. When the components are correctly connected, a closed detection circuit is formed. The circuit detection unit is electrically connected to the closed detection circuit and is used to monitor the circuit's on / off status in real time. When a circuit is detected to be open, it is determined that there is a risk of misalignment, separation, or detachment of the connections of each component of the puncture catheter main body.

[0018] The early warning device also includes an alarm device, which is electrically connected to the controller. When the controller determines that the value of inflammatory factors exceeds a preset threshold, or when the circuit detection unit detects that the conductive fiber circuit is broken, the alarm device can issue an early warning signal through vibration and a dual-color warning light.

[0019] Furthermore, the controller includes a valve control module and a pump control module;

[0020] The valve control module is used to control each valve of the valve assembly, and can output pulse control signals according to treatment needs to realize the independent switching and opening degree adjustment of each electrically controlled valve;

[0021] The pump control module is electrically connected to the peristaltic pump and is used to control the speed of the peristaltic pump motor. The pump control module automatically adjusts the speed of the peristaltic pump motor according to the set child's weight to achieve a coordinated match between the amount of flushing fluid delivered and the amount of drainage fluid discharged, avoiding liquid stagnation in the circulating mixing tube or excessive negative pressure that could damage tissues. The controller is equipped with an operation panel, through which the child's weight can be set.

[0022] Furthermore, the peristaltic pump has a dual channel, with the first bladder and the second bladder respectively embedded in the two channels of the peristaltic pump. The motor of the peristaltic pump is located between the two channels, and the motor drives the rotating rod to rotate. The end of the rotating rod is provided with a roller to push the mixed liquid in the first bladder and the second bladder.

[0023] Furthermore, the rotating rod is cross-shaped, and each of its four ends is equipped with a roller. As the rotating rod rotates, the rollers respectively abut against the first and second bladders. During the rotation of the rotating rod, at least one of the rollers presses against the first and second bladders.

[0024] Furthermore, both the flushing tube and the drainage tube are equipped with one-way valves. These one-way valves have a one-way conduction function, ensuring one-way injection of flushing fluid and one-way discharge of drainage fluid, thus preventing backflow contamination.

[0025] Furthermore, each valve in the valve assembly is an electrically operated clamp valve. It achieves shut-off by clamping the pipe, only contacts the pipe, avoids contamination, and is reusable.

[0026] Furthermore, it also includes a portable case, within which the valve assembly, the pump assembly, the warning device, and the controller are all fixedly mounted. Only the puncture catheter body and the fixing assembly need to be replaced; the remaining components are reusable.

[0027] Compared to existing technologies, the advantages of this invention are as follows: The first and second sacs of the puncture catheter body, in conjunction with a dual-channel peristaltic pump, achieve cyclic flushing, ensuring thorough flushing and preventing incomplete pathogen removal due to retention; all valve components are electrically controlled, with precise on / off control by the controller, eliminating the need for frequent manual switching, avoiding operational errors, and reducing the risk of contamination; addressing the issue of "single pump / manual control being difficult to match with children's tolerance," the controller's pump control module allows input of the child's weight via the operation panel to automatically adjust the peristaltic pump speed, achieving dynamic matching between the flushing fluid delivery volume and the drainage fluid discharge volume, catering to the characteristics of children's small size and low tissue tolerance, avoiding excessive flushing volume due to manual operation errors, which could increase local tissue pressure and cause periosteal irritation or joint cavity damage; the malleable base of the fixation component adheres to the child's skin through a low-sensitivity adhesive layer, and the elastic cushioning fixation strap and needle protection buckle form a double fixation through Velcro, resisting external pulling forces from the child and ensuring a stable puncture needle position. The needle protection cap secures the puncture needle, preventing displacement and injury to children due to external forces. An early warning system is included; its inflammation monitoring submodule uses a miniature electrochemical sensor to periodically collect inflammatory factor signals, while the structural integrity monitoring submodule uses conductive fibers to monitor the catheter connection status. When inflammatory factors exceed a threshold or the circuit is broken, the warning device activates with vibration and a dual-color warning light, preventing delays in treatment or secondary infections. Continuous flushing in a circulating mode allows the controller to independently adjust the electrically controlled valves of the valve assembly. When replenishing medication or cleaning the drainage tube, only the local channel needs to be switched, without pausing the entire flushing system, meeting the needs of children for long-term, low-dose, and continuous stable flushing. Furthermore, the flushing and drainage tubes have built-in one-way valves to prevent backflow and contamination of the flushing and drainage fluids. The valve assembly uses reusable electric clamp valves, and the core components are integrated into the carrying case. Only the puncture catheter body and fixing components need to be replaced, reducing medical costs. The overall design is adapted to the physiological characteristics of children, improving treatment safety and practicality. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of a medical puncture catheter for the treatment of bone and joint infections in children according to the present invention;

[0029] Figure 2 This is a control system architecture diagram of a medical puncture catheter for the treatment of bone and joint infections in children according to the present invention.

[0030] 1-Puncture catheter body, 11-Flushing tube, 12-Drainage tube, 13-Circulation mixing tube, 131-First balloon, 132-Second balloon, 133-Connecting tube, 134-T-connector, 14-Puncture needle, 15-Drug bag, 16-Drainage bag, 2-Fixing assembly, 21-Moldable base, 22-Elastic cushioning strap, 221-First Velcro, 23-Needle tip protection cap, 231-Second Velcro, 3-Valve assembly, 31-First flushing valve, 32-Second flushing valve, 33-First drainage valve 34-Second drainage valve, 35-First partition valve, 36-Second partition valve, 4-Pump assembly, 41-Peristaltic pump, 411-Rotating rod, 412-Roller, 5-Early warning device, 51-Inflammation monitoring submodule, 511-Miniature electrochemical sensor, 512-Signal processing unit, 513-Detection syringe, 52-Structural integrity monitoring submodule, 521-Conductive fiber, 522-Circuit detection unit, 53-Alarm device, 6-Controller, 61-Valve control module, 62-Pump control module, 7-Portable case. Detailed Implementation

[0031] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses consistent with some aspects of this disclosure as detailed in the appended claims.

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0033] like Figures 1 to 2 As shown, a medical puncture catheter for the treatment of bone and joint infections in children includes a puncture catheter body 1, a fixation component 2, a valve component 3, a pump component 4, an early warning device 5, and a controller 6.

[0034] The puncture catheter body 1 includes an irrigation tube 11, a drainage tube 12, a circulating mixing tube 13, a puncture needle 14, a medication bag 15, and a drainage bag 16; the valve assembly 3 includes a first irrigation valve 31, a second irrigation valve 32, a first drainage valve 33, a second drainage valve 34, a first separating valve 35, and a second separating valve 36; the circulating mixing tube 13 includes a first bladder 131, a second bladder 132, a connecting tube 133, and a three-way tube 134; the irrigation tube 11 is connected to the first bladder 132. At the first end of 31, the drainage tube 12 is connected to the first end of the second sac 132. The flushing tube 11 is equipped with the first flushing valve 31, and the drainage tube 12 is equipped with the first drainage valve 33. The puncture needle 14 is connected to the three-way tube 134 via a flexible tube. The flexible tube connecting the puncture needle 14 to the three-way tube 134 is equipped with the second separating valve 36. The other two ends of the three-way tube 134 are respectively connected to the first sac 131 and the second sac 132 via flexible tubes. At the tail end, the tail ends of the first sac 131 and the second sac 132 are respectively provided with the second flushing valve 32 and the second drainage valve 34. The adjacent sides of the head ends of the first sac 131 and the second sac 132 are connected by the connecting pipe 133. The connecting pipe 133 is provided with the first separating valve 35. All valves of the valve assembly 3 are electrically controlled valves, and each valve is electrically connected to the controller 6. The pump assembly 4 includes a peristaltic pump 41. The peristaltic pump 41 drives the liquid in the first sac 131 to flow from the head end to the tail end, and drives the liquid in the second sac 132 to flow from the tail end to the head end. The peristaltic pump 41 is electrically connected to the controller 6. The end of the flushing pipe 11 is connected to the medicine bag 15, and the end of the drainage pipe 12 is connected to the drainage bag 16. The fixing assembly 2 is used to fix the position of the puncture needle 14. The early warning device 5 is used to monitor the changes in inflammation of the child's infection focus and the structural integrity of the puncture catheter body 1 in real time.

[0035] Furthermore, the fixing component 2 includes a malleable base 21, an elastic cushioning fixing band 22, and a needle protection cap 23; the bottom of the malleable base 21 is attached with a low-sensitivity adhesive layer for attaching to the skin surface at the puncture site of the patient, and the malleable base 21 has a hollowed-out section in the middle to expose the puncture site; the elastic cushioning fixing band 22 has a first Velcro 221 in the middle, and the elastic cushioning fixing band 22 is detachably connected to both sides of the malleable base 21, and the elastic cushioning fixing band 22 is used to fix the position of the puncture needle 14; one end of the needle protection cap 23 is connected to the malleable base 21 through a cloth strip, and the needle protection cap 23 can fasten the puncture needle 14; the end of the needle protection cap 23 has a second Velcro 231, and when the needle protection cap 23 fastens the puncture needle 14, the second Velcro 231 is attached to the first Velcro 221.

[0036] Furthermore, the early warning device 5 includes an inflammation monitoring submodule 51 and a structural integrity monitoring submodule 52;

[0037] The inflammation monitoring submodule 51 includes a miniature electrochemical sensor 511, a signal processing unit 512, and a detection syringe 513. A connection port is provided on one side of the second capsule 132, and the needle of the detection syringe 513 is connected to the connection port. The detection syringe 513 is equipped with an electromagnetic push rod for driving the syringe push rod. The miniature electrochemical sensor 511 is disposed inside the detection syringe 513. The signal processing unit 512 is electrically connected to the miniature electrochemical sensor 511. The signal processing unit 512 converts the analog signal collected by the miniature electrochemical sensor 511 into a digital signal and transmits it to the controller 6. Liquid can be periodically extracted to collect signals of inflammatory factors such as C-reactive protein and procalcitonin in the tissue surrounding the infection site. When the inflammatory factor signal level reaches a threshold, an alarm is triggered, and the medication solution is replaced.

[0038] Furthermore, the structural integrity monitoring submodule 52 includes a conductive fiber 521 and a circuit detection unit 522. The conductive fiber 521 is embedded along the puncture catheter body 1. Electronic energy storage is provided at the connection points of each component of the puncture catheter body 1. When each component is correctly connected, a closed detection circuit is formed. The circuit detection unit 522 is electrically connected to the closed detection circuit and is used to monitor the circuit's on / off state in real time. When a circuit is detected to be open, it is determined that there is a risk of misalignment, separation, or detachment in the connection of each component of the puncture catheter body 1.

[0039] The early warning device 5 also includes an alarm device 53, which is electrically connected to the controller 6. When the controller 6 determines that the value of the inflammatory factor exceeds a preset threshold, or when the circuit detection unit 522 detects that the conductive fiber 521 circuit is disconnected, the alarm device 53 can issue an early warning signal through vibration and a dual-color warning light.

[0040] Furthermore, the controller 6 includes a valve control module 61 and a pump control module 62;

[0041] The valve control module 61 is used to control each valve of the valve assembly 3. It can output pulse control signals according to treatment needs, realize the independent switching and opening degree adjustment of each electric valve, and can switch between three working modes: "rinsing-drainage-circulation".

[0042] In the flushing mode, the first drainage valve 33, the second drainage valve 34 and the first separation valve 35 are closed, and the first flushing valve 31, the second flushing valve 32 and the second separation valve 36 are opened; so that the flushing fluid flows through the flushing tube 11 and the first capsule 131 to the puncture needle 14;

[0043] In the drainage mode, the first drainage valve 33, the second drainage valve 34 and the second separation valve 36 are opened, and the first flushing valve 31, the second flushing valve 32 and the first separation valve 35 are closed, so that the mixed liquid is discharged into the drainage bag 16 through the second bladder 132 and the drainage tube 12.

[0044] In circulation mode, the first capsule 131 is first filled with flushing solution. The first separator valve 35 is then opened, and the first flushing valve 31, the first drainage valve 33, and the second separator valve 36 are closed. The second flushing valve 32 and the second drainage valve 34 are then switched on and off alternately at a fixed frequency, intermittently injecting and extracting the mixture, so that the fluid returning from the infected lesion is fully mixed in the circulation mixing tube 13. This facilitates the detection of inflammatory factors by the inflammation monitoring submodule 51. Moreover, through circulation flushing, not only is the flushing time extended, but the accumulated fluid is also fully mixed and extracted, and the amount of fluid consumed is reduced.

[0045] The pump control module 62 is electrically connected to the peristaltic pump 41 and is used to control the motor speed of the peristaltic pump 41. The pump control module 62 automatically adjusts the motor speed of the peristaltic pump 41 according to the set child weight to achieve coordinated matching of the flushing fluid delivery volume and the drainage fluid discharge volume, so as to avoid liquid stagnation in the circulating mixing tube 13 or excessive negative pressure that could damage the tissue. The controller 6 is provided with an operation panel, through which the child's weight can be set.

[0046] Furthermore, the peristaltic pump 41 is provided with dual channels, and the first capsule 131 and the second capsule 132 are respectively embedded in the two channels of the peristaltic pump 41. The motor of the peristaltic pump 41 is located between the two channels. The motor drives the rotating rod 411 to rotate. The end of the rotating rod 411 is provided with a roller 412 to push the mixed liquid in the first capsule 131 and the second capsule 132.

[0047] Furthermore, the rotating rod 411 is cross-shaped, and each of its four ends is provided with a roller 412. When the rotating rod 411 rotates, the roller 412 abuts against the first bladder 131 and the second bladder 132 respectively. During the rotation of the rotating rod 411, the first bladder 131 and the second bladder 132 are pressed against by at least one of the rollers 412.

[0048] Furthermore, both the flushing tube 11 and the drainage tube 12 are equipped with one-way valves. The one-way valves have a one-way conduction function, ensuring that the flushing fluid is injected in one direction and the drainage fluid is discharged in one direction, avoiding backflow contamination.

[0049] Furthermore, each valve in the valve assembly 3 is an electrically operated clamp valve. It achieves shut-off by clamping the pipe, only contacts the pipe, avoids contamination, and is reusable.

[0050] Furthermore, it also includes a portable case 7, in which the valve assembly 3, the pump assembly 4, the warning device 5, and the controller 6 are all fixedly installed. Only the puncture catheter body 1 and the fixing assembly 2 need to be replaced; the remaining components can be reused.

[0051] Compared to existing technologies, the advantages of this invention are as follows: The first and second sacs of the puncture catheter body, in conjunction with a dual-channel peristaltic pump, achieve cyclic flushing, ensuring thorough flushing and preventing incomplete pathogen removal due to retention; all valve components are electrically controlled, with precise on / off control by the controller, eliminating the need for frequent manual switching, avoiding operational errors, and reducing the risk of contamination; addressing the issue of "single pump / manual control being difficult to match with children's tolerance," the controller's pump control module allows input of the child's weight via the operation panel to automatically adjust the peristaltic pump speed, achieving dynamic matching between the flushing fluid delivery volume and the drainage fluid discharge volume, catering to the characteristics of children's small size and low tissue tolerance, avoiding excessive flushing volume due to manual operation errors, which could increase local tissue pressure and cause periosteal irritation or joint cavity damage; the malleable base of the fixation component adheres to the child's skin through a low-sensitivity adhesive layer, and the elastic cushioning fixation strap and needle protection buckle form a double fixation through Velcro, resisting external pulling forces from the child and ensuring a stable puncture needle position. The needle protection cap secures the puncture needle, preventing displacement and injury to children due to external forces. An early warning system is included; its inflammation monitoring submodule uses a miniature electrochemical sensor to periodically collect inflammatory factor signals, while the structural integrity monitoring submodule uses conductive fibers to monitor the catheter connection status. When inflammatory factors exceed a threshold or the circuit is broken, the warning device activates with vibration and a dual-color warning light, preventing delays in treatment or secondary infections. Continuous flushing in a circulating mode allows the controller to independently adjust the electrically controlled valves of the valve assembly. When replenishing medication or cleaning the drainage tube, only the local channel needs to be switched, without pausing the entire flushing system, meeting the needs of children for long-term, low-dose, and continuous stable flushing. Furthermore, the flushing and drainage tubes have built-in one-way valves to prevent backflow and contamination of the flushing and drainage fluids. The valve assembly uses reusable electric clamp valves, and the core components are integrated into the carrying case. Only the puncture catheter body and fixing components need to be replaced, reducing medical costs. The overall design is adapted to the physiological characteristics of children, improving treatment safety and practicality.

Claims

1. A medical puncture catheter for the treatment of bone and joint infections in children, characterized in that, It includes a puncture catheter body (1), a fixation assembly (2), a valve assembly (3), a pump assembly (4), an early warning device (5), and a controller (6); The main body (1) of the puncture catheter includes an irrigation tube (11), a drainage tube (12), a circulating mixing tube (13), a puncture needle (14), a medication bag (15), and a drainage bag (16); the valve assembly (3) includes a first irrigation valve (31), a second irrigation valve (32), a first drainage valve (33), a second drainage valve (34), a first separation valve (35), and a second separation valve (36); the circulating mixing tube (13) includes a first capsule (131), a second capsule (132), a connecting tube (133), and a three-way tube (134); the irrigation tube (11) The first end of the first capsule (131) is connected to the head end of the drainage tube (12), the second end of the second capsule (132) is connected to the head end of the drainage tube (11), the first flushing valve (31) is provided on the flushing tube (11), the first drainage valve (33) is provided on the drainage tube (12), the puncture needle (14) is connected to the three-way tube (134) through a flexible tube, the flexible tube connecting the puncture needle (14) to the three-way tube (134) is provided with the second separating valve (36), and the other two ends of the three-way tube (134) are respectively connected to the first capsule (131) and the second capsule (132) through flexible tubes. At the tail end of the bladder (132), the tail ends of the first bladder (131) and the second bladder (132) are respectively provided with the second flushing valve (32) and the second drainage valve (34). The adjacent sides of the head ends of the first bladder (131) and the second bladder (132) are connected by the connecting pipe (133). The connecting pipe (133) is provided with the first separating valve (35). The valves of the valve assembly (3) are all electrically controlled valves, and each valve is electrically connected to the controller (6). The pump assembly (4) includes a peristaltic pump (41). The peristaltic pump (41) drives the liquid in the first capsule (131) to flow from the head end to the tail end, and drives the liquid in the second capsule (132) to flow from the tail end to the head end. The peristaltic pump (41) is electrically connected to the controller (6). The end of the flushing tube (11) is connected to the medicine bag (15), and the end of the drainage tube (12) is connected to the drainage bag (16). The fixing component (2) is used to fix the position of the puncture needle (14). The early warning device (5) is used to monitor the changes in inflammation of the child's infection focus and the structural integrity of the puncture catheter body (1) in real time.

2. The medical puncture catheter for treating bone and joint infections in children according to claim 1, characterized in that, The fixing component (2) includes a malleable base (21), an elastic cushioning fixing band (22), and a needle protection cap (23). The malleable base (21) has a low-sensitivity adhesive layer attached to its bottom for attaching to the patient's skin at the puncture site. The malleable base (21) has a cutout in the middle to expose the puncture site. The elastic cushioning fixing band (22) has a first Velcro fastener (221) in the middle, and the elastic cushioning fixing band (22) is detachably connected to both sides of the malleable base (21). The elastic buffer fixing band (22) is used to fix the position of the puncture needle (14); one end of the needle protection buckle (23) is connected to the malleable base (21) through a cloth strip, the needle protection buckle (23) can fasten the puncture needle (14), and the end of the needle protection buckle (23) is provided with a second Velcro (231). When the needle protection buckle (23) fastens the puncture needle (14), the second Velcro (231) is attached to the first Velcro (221).

3. The medical puncture catheter for treating bone and joint infections in children according to claim 1, characterized in that, The early warning device (5) includes an inflammation monitoring submodule (51) and a structural integrity monitoring submodule (52); The inflammation monitoring submodule (51) includes a micro electrochemical sensor (511), a signal processing unit (512), and a detection syringe (513). A connection port is provided on one side of the second capsule (132). The needle of the detection syringe (513) is connected to the connection port. The detection syringe (513) is provided with an electromagnetic push rod for driving the syringe push rod. The micro electrochemical sensor (511) is located inside the detection syringe (513). The signal processing unit (512) is electrically connected to the micro electrochemical sensor (511). The signal processing unit (512) converts the analog signal collected by the micro electrochemical sensor (511) into a digital signal and transmits it to the controller (6).

4. A medical puncture catheter for treating bone and joint infections in children according to claim 3, characterized in that, The structural integrity monitoring submodule (52) includes a conductive fiber (521) and a circuit detection unit (522). The conductive fiber (521) is embedded along the main body of the puncture catheter (1). Electronic energy storage is provided at the connection points of each component of the main body of the puncture catheter (1). When each component is correctly connected, a closed detection circuit is formed. The circuit detection unit (522) is electrically connected to the closed detection circuit and is used to monitor the circuit on / off status in real time. The warning device (5) also includes an alarm device (53), which is electrically connected to the controller (6). When the controller (6) determines that the value of the inflammatory factor exceeds the preset threshold, or when the circuit detection unit (522) detects that the conductive fiber (521) circuit is disconnected, the alarm device (53) can issue an alarm signal through vibration and a dual-color warning light.

5. A medical puncture catheter for treating bone and joint infections in children according to claim 4, characterized in that, The controller (6) includes a valve control module (61) and a pump control module (62); The valve control module (61) is used to control each valve of the valve assembly (3), and can output pulse control signals according to treatment needs to realize the independent switching and opening degree adjustment of each electric valve; The pump control module (62) is electrically connected to the peristaltic pump (41) and is used to control the motor speed of the peristaltic pump (41). The pump control module (62) automatically adjusts the motor speed of the peristaltic pump (41) according to the set child weight.

6. A medical puncture catheter for treating bone and joint infections in children according to claim 2, characterized in that, The peristaltic pump (41) has two channels. The first capsule (131) and the second capsule (132) are respectively embedded in the two channels of the peristaltic pump (41). The motor of the peristaltic pump (41) is located between the two channels. The motor drives the rotating rod (411) to rotate. The end of the rotating rod (411) is provided with a roller (412) to push the mixed liquid in the first capsule (131) and the second capsule (132).

7. A medical puncture catheter for treating bone and joint infections in children according to claim 6, characterized in that, The rotating rod (411) is cross-shaped, and each of the four ends of the rotating rod (411) is provided with a roller (412). When the rotating rod (411) rotates, the roller (412) abuts against the first bladder (131) and the second bladder (132) respectively.

8. A medical puncture catheter for treating bone and joint infections in children according to claim 1, characterized in that, Both the flushing tube (11) and the drainage tube (12) are equipped with one-way valves.

9. A medical puncture catheter for treating bone and joint infections in children according to claim 1, characterized in that, Each valve in the valve assembly (3) is an electric clamp valve.

10. A medical puncture catheter for treating bone and joint infections in children according to claim 1, characterized in that, It also includes a portable case (7), in which the valve assembly (3), the pump assembly (4), the warning device (5) and the controller (6) are all fixedly installed.

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