Bladder drainage medicine perfusion device
By designing a bladder drainage drug perfusion device, the continuous perfusion and drainage of drugs can be synchronized, which solves the problems of instinctive and high concentration of drug perfusion in traditional methods, extends the time of drug action, reduces bladder stimulation, and improves treatment effect and safety.
Patent Information
- Application Number
- CN202510507320.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-22
- Publication Date
- 2025-08-15
AI Technical Summary
Traditional bladder perfusion methods Drug perfusion is not continuous, high drug concentration stimulates the bladder mucosa, short drug action time, affects the efficacy and may cause complications.
Design a bladder drainage drug perfusion device, including a diversion tube, a drug perfusion mechanism and a one-way valve, to achieve continuous drug perfusion and drainage synchronization, adjust drug concentration and temperature through spiral channels and heating sheets, and control the drug dosage using a bionic fish gill-shaped one-way valve and flow sensor. The diversion tube is coated with superhydrophobic/antibacterial nanomaterials to prevent infection.
Prolong the contact time between the drug and the bladder mucosa, improve the efficacy, reduce complications, enhance the uniformity of the drug distribution, and improve patient comfort and safety.
Smart Images
Figure CN120478744A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of medical devices, and in particular relates to a bladder drainage drug infusion device. Background Art
[0002] Intravesical instillation is a commonly used localized intravesical drug therapy, primarily used for postoperative preventive chemotherapy of bladder tumors and irrigation for cystitis. It typically involves a single infusion of diluted medication into the patient's bladder via a urinary catheter, where it remains for 0.5 to 2 hours. However, this approach has drawbacks: Because the drug is administered once via a urinary catheter, it lacks continuity during the instillation process. Due to limited bladder capacity, the drug is excreted from the body within a short period of time, shortening its retention time. This is particularly true for patients with conditions such as interstitial cystitis, where the drug's contact time with the bladder mucosa is too short, resulting in inadequate drug action, impacting efficacy and causing drug waste. Furthermore, the high drug concentration achieved during this single instillation via a urinary catheter can significantly irritate the bladder during preventive intravesical chemotherapy for bladder cancer, potentially causing burns to the bladder mucosa and chemical cystitis, leading to symptoms such as frequent urination, urgency, dysuria, and hematuria. Summary of the Invention
[0003] The purpose of the present invention is to provide a bladder drainage drug infusion device to solve the problems existing in the above-mentioned prior art.
[0004] To achieve the above-mentioned objectives, the present invention provides the following solution: The present invention provides a bladder drainage drug infusion device, comprising a drainage tube, one end of which is connected to a urine storage bag, the other end of which is connected to the bladder via a first connecting tube, and both sides of the drainage tube are symmetrically connected to a drug infusion mechanism, the drug infusion mechanism comprising a first connector connected to the drainage tube, a one-way valve being provided in the first connector, and the first connector being connected to a drug infusion part.
[0005] Preferably, the drug infusion part includes a second connecting tube connected to the first connector, the end of the second connecting tube away from the first connector is connected to the medicine storage box, and a spiral channel is provided in the second connecting tube, which is connected to the first connector and the medicine storage box respectively.
[0006] Preferably, a heating plate is provided at one end of the second connecting pipe close to the first joint, and the heating plate is located outside the spiral channel.
[0007] Preferably, the one-way valve is a bionic fish gill-shaped one-way valve.
[0008] Preferably, an electronic valve is provided in the medicine storage box, the electronic valve is communicated with the spiral channel, a flow sensor is provided in the flow guide tube, and the flow sensor is electrically connected to the electronic valve.
[0009] Preferably, a first through hole is provided on both sides of the guide tube, the first joint is located in the first through hole, a first groove is symmetrically provided in the first through hole, a sealing ring is provided in the first groove, and the sealing ring abuts against the outer wall of the first joint.
[0010] Preferably, one end of the first connecting tube extending into the bladder is connected to a shape memory alloy net bag.
[0011] Preferably, the inner surface of the guide tube is coated with a super-hydrophobic / antibacterial dual-functional nanomaterial.
[0012] Preferably, a second connector is provided at one end of the urine storage bag, and the second connector is connected to the inside of the diversion tube through a third connecting tube.
[0013] Preferably, one end of the urine storage bag away from the second connector is connected to a negative pressure mechanism.
[0014] The present invention discloses the following technical effects: a drainage tube connects the urine storage bag and the bladder, and a drainage channel is established through a first connecting tube. A symmetrically arranged drug infusion mechanism is connected to the drainage tube through a first connector, and a one-way valve ensures that the drug flows unidirectionally into the bladder, preventing urine backflow. The present invention can achieve continuous drug infusion and drainage simultaneously, breaking through the limitations of traditional one-time infusion, extending the contact time between the drug and the bladder mucosa, and improving the therapeutic effect; the symmetrical design allows for bilateral drug administration, enhancing the uniformity of drug distribution, and is suitable for chemotherapy after tumor surgery or the treatment of interstitial cystitis. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of this application. The exemplary embodiments and descriptions of this application are intended to explain this application and do not constitute an improper limitation on this application. In the accompanying drawings:
[0016] Figure 1 Schematic diagram of the structure of the bladder drainage drug infusion device of the present invention;
[0017] Figure 2 For the present invention Figure 1 A partial enlarged view of middle A.
[0018] In the figure: 1. diversion tube; 2. urine storage bag; 3. first connecting tube; 4. first joint; 5. one-way valve; 6. second connecting tube; 7. medicine storage box; 8. spiral channel; 9. heating plate; 10. electronic valve; 11. flow sensor; 12. first through hole; 13. first groove; 14. sealing ring; 15. second joint; 16. third connecting tube. DETAILED DESCRIPTION
[0019] Intravesical instillation is a commonly used localized intravesical medication therapy, playing an important role in preventive chemotherapy after bladder tumor surgery and cystitis irrigation. However, traditional intravesical instillation methods suffer from limitations such as lack of continuity, irritation to the bladder mucosa caused by high drug concentrations, and a short duration of drug action. The advent of bladder drainage drug instillation devices offers a new approach to addressing these issues.
[0020] Bladder diseases are common urinary system disorders, and conditions such as bladder tumors and cystitis seriously impact patients' quality of life. Intravesical instillation, a treatment method that injects medication directly into the bladder, plays an important role in the treatment of bladder diseases. While traditional intravesical instillation methods can be therapeutic to a certain extent, they also have many limitations. The bladder drainage drug instillation device, a new medical device, aims to overcome the shortcomings of traditional methods and improve the effectiveness and safety of intravesical instillation therapy.
[0021] The bladder drainage and drug infusion device mainly consists of a urinary catheter with a positioning bag, a urinary drainage chamber, a water injection chamber, a drug infusion chamber, etc. Its working principle is as follows:
[0022] Catheterization Function: The urinary catheter is a three-lumen tube equipped with a urinary drainage lumen, a water infusion lumen, and a drug infusion lumen. The urinary drainage lumen is located in the center of the catheter. The upper end of the catheter is closed, and the upper sidewall is provided with a drainage port that communicates with the urinary drainage lumen. The lower end is provided with an outlet for the urinary drainage lumen that connects to a urine drainage bag. When the upper end of the urinary catheter is inserted into the patient's bladder and the lower end is left outside the patient's body, urine in the patient's bladder can flow through the drainage port into the urinary drainage lumen of the catheter, and then be discharged through the urinary drainage lumen into the urine drainage bag, thus completing the urinary catheterization function.
[0023] Positioning function: A water injection chamber is located in the side wall of the catheter. The water inlet at the upper end is connected to the positioning bladder, and the water injection hole at the lower end is connected to the water injection interface, which is equipped with a switch. Water is injected into the positioning bladder through the water injection chamber, causing the positioning bladder to swell, thereby positioning the catheter and preventing it from moving within the bladder.
[0024] Drug Infusion: The drug infusion chamber is also located within the sidewall of the catheter. The upper injection port extends through the sidewall, while the lower injection hole connects to the injection port. This port is connected via a catheter to a drug infusion pump with adjustable flow rate. One end of the drug infusion pump is connected to a medication tank. The drug in the tank first flows into the drug infusion pump, where it regulates and controls the flow rate before being slowly and continuously infused into the patient's bladder through the drug infusion chamber. This maintains a consistent drug concentration in the bladder over a long period of time, regardless of whether the patient's bladder is empty.
[0025] Structural features of bladder drainage drug infusion device
[0026] (1) Three-lumen tube design
[0027] The catheter is a triple-lumen tube with a urinary drainage chamber, a water injection chamber, and a drug infusion chamber. The three chambers are independent and will not interfere with each other. This design allows the catheter to perform urinary catheterization and drug infusion at the same time, improving treatment efficiency.
[0028] (2) Cavity location and size
[0029] The urinary drainage lumen is located in the center of the catheter, while the water and drug infusion cavities are located in the side walls. The inner diameters of these two cavities are smaller than the inner diameter of the urinary drainage lumen. This design ensures smooth catheterization while also meeting the requirements of water and drug infusion.
[0030] (3) Interface design
[0031] The water injection hole and the drug injection hole are both threaded holes, and the water injection interface and the drug injection interface are threadedly connected to the water injection hole and the drug injection hole respectively. This design is easy to assemble and disassemble, easy to use, and also ensures the sealing of the interface to prevent liquid leakage.
[0032] Application advantages of bladder drainage drug infusion device
[0033] (1) Improving treatment effects
[0034] Compared with existing infusion methods, the bladder drainage drug infusion device not only increases the duration of drug action in the bladder, allowing patients to receive treatment for a longer period of time and improving efficacy, but also reduces the concentration of the infused drug, avoiding bladder irritation caused by excessively high concentrations and improving drug safety. For example, for patients with conditions such as interstitial cystitis, this device allows for longer contact between the bladder mucosa and the drug, allowing the drug to fully exert its effects.
[0035] (2) Reduce complications
[0036] Traditional bladder instillation methods, due to their high drug concentrations, can cause burns to the bladder mucosa, leading to chemical cystitis and symptoms such as frequent urination, urgency, pain, and hematuria. However, bladder drainage drug instillation devices lower drug concentrations by continuously and slowly instilling the drug, thus reducing the occurrence of these complications.
[0037] (3) Easy to use
[0038] The device has a simple structure and is easy to operate. Medical personnel simply insert a catheter into the patient's bladder and connect the water injection port, drug injection port, and medication infusion pump to begin treatment. Furthermore, the threaded connection design of the water and drug injection ports facilitates assembly and disassembly, enhancing user convenience.
[0039] Problems existing in existing bladder drainage drug infusion devices
[0040] (1) Material selection
[0041] Currently, urinary catheters are typically made of silicone or rubber. Although silicone has good biocompatibility and flexibility, it can still age and deform over time, affecting the lifespan and safety of the device.
[0042] (2) Performance of drug infusion pump
[0043] The drug infusion pump is a key component of bladder drainage drug infusion devices, and its performance directly affects the drug infusion effect. Existing drug infusion pumps may have problems such as inaccurate flow rate regulation and poor stability, resulting in uneven drug infusion and affecting treatment effectiveness.
[0044] (3) Cleaning and disinfection of the device
[0045] Because bladder drainage drug infusion devices come into direct contact with the patient's bladder, they require rigorous cleaning and disinfection before and after use. However, the device's complex structure has some difficult-to-clean areas that are prone to bacterial growth, increasing the risk of infection.
[0046] (4) Patient comfort
[0047] Although bladder drainage drug infusion devices have improved treatment efficacy to a certain extent, prolonged indwelling of a urinary catheter can cause discomfort to patients, such as pain and itching. Furthermore, the bulging of the positioning bladder may also put pressure on the bladder wall, affecting patient comfort.
[0048] Current status of technical development of bladder drainage drug infusion devices
[0049] (1) Domestic technological development
[0050] In China, there are related invention patents and utility model patents related to bladder drainage drug infusion devices. For example, one invention discloses a bladder drainage drug infusion device with a three-lumen catheter comprising a urinary drainage chamber, a water injection chamber, and a drug infusion chamber. Water is injected into a positioning bag through the water injection chamber for positioning. The drug in the drug tank is then slowly and continuously infused into the patient's bladder through the drug infusion chamber after the flow rate is adjusted by a drug infusion pump. Another utility model discloses a similar device that emphasizes the threaded connection design of the water injection hole and the drug injection hole for easy assembly and disassembly. The emergence of these patented technologies has promoted the development of bladder drainage drug infusion devices in China.
[0051] (2) Foreign technological development
[0052] Internationally, medical devices such as cystoscopic infusion pumps are widely used in bladder instillation therapy. Cystoscopic instillation pumps can be used to infuse medications, fluids, and other media into the patient's bladder, and have diverse applications, including postoperative analgesia, drug infusions for certain conditions, and continuous urine drainage and monitoring. While international cystoscopic instillation pumps and bladder drainage and drug instillation devices may differ in their specific structure and operating principles, they share the goal of improving the effectiveness of bladder instillation therapy.
[0053] Progress in the application of bladder drainage drug infusion devices in the treatment of bladder diseases
[0054] (1) Bladder cancer treatment
[0055] Bladder cancer is one of the most common types of bladder disease, and bladder drainage drug infusion devices have important application value in the treatment of bladder cancer. By continuously and slowly infusing chemotherapy drugs into the bladder, the contact area between the drug and tumor cells can be increased, improving the therapeutic effect, reducing the drug's impact on other organs, and minimizing side effects. For example, some new chemotherapy drugs, such as pirarubicin, can be injected into the bladder through a bladder drainage drug infusion device. They can quickly enter the bladder wall and reach effective anticancer concentrations in a short period of time, effectively treating and preventing tumor recurrence.
[0056] (2) Treatment of cystitis
[0057] Cystitis is a common bladder disease. Bladder drainage drug infusion devices can be used to infuse anti-inflammatory drugs, hemostatics, or antibiotics directly into the lesion, accelerating treatment progress and rapidly alleviating symptoms. Compared with traditional oral medications, bladder drainage drug infusion therapy offers advantages such as high local drug concentration, rapid onset of action, and minimal side effects.
[0058] Other bladder disease treatments
[0059] Interstitial cystitis
[0060] Interstitial cystitis is a chronic inflammatory disease of the bladder, and patients often experience symptoms such as bladder pain, frequent urination, and urgency. Bladder drainage drug infusion devices play an important role in the treatment of interstitial cystitis. By infusing drugs with anti-inflammatory, analgesic, and bladder mucosal repair effects into the bladder, such as heparin, lidocaine, sodium bicarbonate, etc., the inflammatory response of the bladder mucosa can be reduced, the patient's pain symptoms can be relieved, and bladder function can be improved. Some clinical studies have shown that the use of bladder drainage drug infusion devices for the treatment of interstitial cystitis has significantly improved patients' symptoms and their quality of life.
[0061] Radiation cystitis
[0062] Radiation cystitis is a common complication after radiotherapy for pelvic tumors, primarily manifesting as frequent urination, urgency, dysuria, and hematuria. Bladder drainage drug infusion devices can be used to infuse hemostatic and anti-inflammatory drugs, as well as medications that promote bladder mucosal repair, such as tranexamic acid, dexamethasone, and sodium hyaluronate. These medications can be continuously and slowly infused into the bladder through the device, directly acting on the damaged bladder mucosa, alleviating inflammation, promoting mucosal repair, reducing bleeding, and alleviating symptoms.
[0063] Future development trends of bladder drainage drug infusion devices
[0064] (1) Intelligent development
[0065] With the continuous advancement of science and technology, intelligent medical equipment will become a future development trend. Bladder drainage drug infusion devices will also develop in an intelligent direction. For example, they will be equipped with smart sensors that can monitor parameters such as bladder pressure, drug concentration, urine flow, etc. in real time and transmit the data to the terminal device of medical staff. Medical staff can adjust the infusion rate and dosage of drugs in a timely manner based on this data to achieve personalized treatment. In addition, intelligent bladder drainage drug infusion devices can also have an automatic alarm function. When abnormal conditions occur, such as excessive bladder pressure or drug blockage, the alarm can be issued in time to remind medical staff to take appropriate measures.
[0066] (2) Material innovation
[0067] To improve the performance and safety of bladder drainage drug infusion devices, future material innovation will be a key research direction. For example, research and development of new biocompatible materials can reduce irritation and damage to the bladder mucosa; development of antibacterial materials can prevent bacterial growth during device use, reducing the risk of infection; and exploration of biodegradable materials that allow the device to gradually degrade after completing its therapeutic task, minimizing long-term effects on the patient's body.
[0068] (3) Multifunctional integration
[0069] Future bladder drainage and drug infusion devices may integrate more functions to meet the treatment needs of different patients. For example, in addition to drug infusion, they may also include bladder irrigation to remove blood clots, pus, and other impurities from the bladder; integrated bladder electrical stimulation to promote bladder muscle contraction and relaxation through electrical stimulation, improving bladder function; and integrated urinalysis to analyze the patient's urine in real time, providing more information for disease diagnosis and treatment.
[0070] (4) Telemedicine Application
[0071] With the widespread adoption of internet technology, telemedicine will become a key model for future healthcare services. Bladder drainage and medication infusion devices can be integrated with telemedicine systems to enable remote monitoring and treatment. Patients can use the bladder drainage and medication infusion device for treatment at home, while medical staff monitor the patient's progress in real time through the telemedicine system, providing adjustments and guidance as needed. This telemedicine application model not only improves the utilization efficiency of medical resources but also provides patients with more convenient and efficient medical services.
[0072] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0073] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.
[0074] Reference Figure 1-Figure 2 As shown, this embodiment provides a bladder drainage drug infusion device, including a drainage tube 1, one end of the drainage tube 1 is connected to a urine storage bag 2, the other end of the drainage tube 1 is connected to the bladder through a first connecting tube 3, and both sides of the drainage tube 1 are symmetrically connected to a drug infusion mechanism, which includes a first connector 4 connected to the drainage tube 1, a one-way valve 5 is provided in the first connector 4, and the first connector 4 is connected to a drug infusion part.
[0075] The drainage tube 1 connects the urine storage bag 2 and the bladder, establishing a drainage channel through the first connecting tube 3. A symmetrically arranged drug infusion mechanism is connected to the drainage tube 1 via a first connector 4. A one-way valve 5 ensures unidirectional drug flow into the bladder, preventing urine backflow. This invention enables simultaneous continuous drug infusion and drainage, breaking through the limitations of traditional one-time infusion, extending the contact time between the drug and the bladder mucosa, and improving efficacy. The symmetrical design allows for bilateral drug administration, enhancing drug distribution uniformity, and is suitable for postoperative chemotherapy for tumors or the treatment of interstitial cystitis.
[0076] To further optimize the solution, the drug infusion part includes a second connecting tube 6 connected to the first connector 4, and the end of the second connecting tube 6 away from the first connector 4 is connected to the medicine storage box 7. A spiral channel 8 is provided in the second connecting tube 6, and the spiral channel 8 is connected to the first connector 4 and the medicine storage box 7 respectively.
[0077] The drug storage tank 7 delivers the drug to the spiral channel 8 through the second connecting tube 6. The spiral structure extends the drug flow path, promoting uniform mixing before entering the guide tube 1. The spiral channel 8 enhances drug dispersion through turbulence, preventing chemical cystitis caused by excessive local concentration.
[0078] As a further optimization solution, a heating plate 9 is provided at one end of the second connecting tube 6 close to the first joint 4 , and the heating plate 9 is located outside the spiral channel 8 .
[0079] The heating plate 9 heats the outside of the spiral channel 8 and maintains the temperature of the medicine through heat conduction, thereby preventing the cold liquid from irritating the bladder and relieving spasmodic pain. Heating can also enhance the activity of certain drugs (such as mitomycin, which is thermosensitive) and improve the effect of chemotherapy.
[0080] A further optimization scheme has been implemented, with the one-way valve 5 being a bionic fish gill-like one-way valve. This one-way valve 5 opens and closes via a flexible diaphragm in response to fluid pressure differentials to achieve one-way conduction. This bionic structure reduces valve resistance, preventing leakage during high-pressure infusion, while also reducing mechanical wear and extending the device's service life.
[0081] To further optimize the solution, an electronic valve 10 is provided in the medicine storage box 7 , the electronic valve 10 is communicated with the spiral channel 8 , a flow sensor 11 is provided in the flow guide tube 1 , and the flow sensor 11 is electrically connected to the electronic valve 10 .
[0082] Flow sensor 11 monitors the flow rate of the drug solution in the drainage tube 1, and feedback controls the opening of electronic valve 10 to adjust the drug dosage. This enables precise dosage control (for example, gemcitabine requires a concentration of 20 mg / ml), avoiding side effects caused by concentration fluctuations. Automation reduces the intensity of medical operations and reduces human error.
[0083] According to a further optimization scheme, first through holes 12 are respectively provided on both sides of the guide tube 1, the first joint 4 is located in the first through hole 12, first grooves 13 are symmetrically provided in the first through hole 12, a sealing ring 14 is provided in the first groove 13, and the sealing ring 14 abuts against the outer wall of the first joint 4.
[0084] The first connector 4 is inserted into the first through hole 12 of the flow guide tube 1, and the sealing ring 14 is deformed under pressure to fill the gap. The double-groove sealing design enhances leak-proof performance and is suitable for high-pressure perfusion scenarios.
[0085] As a further optimization, the end of the first connecting tube (3) that extends into the bladder is connected to a shape-memory alloy mesh bag. This mesh bag returns to its preset shape at body temperature, fitting against the inner wall of the bladder to secure the catheter. This prevents the catheter from shifting or falling out, ensuring stable infusion.
[0086] To further optimize the solution, the inner surface of the drainage tube 1 is coated with a dual-functional superhydrophobic / antimicrobial nanomaterial. The superhydrophobic coating reduces drug residue, while the antimicrobial nanomaterial (such as Ag / AgCl / TiO2) inhibits bacterial colonization. This reduces the risk of urinary tract infections (such as those associated with interstitial cystitis) and extends the device's lifespan. The superhydrophobic surface facilitates flushing, reducing cross-contamination.
[0087] In a further optimization, a second connector 15 is provided at one end of the urine bag 2. This connector 15 communicates with the interior of the drainage tube 1 via a third connecting tube 16. This connection of the urine bag 2 to the drainage tube 1 separates the urine collection channel from the drug infusion channel, preventing urine backflow from contaminating the drug solution and ensuring safe infusion.
[0088] In a further optimized solution, a negative pressure mechanism is connected to the end of the urine storage bag 2 away from the second connector 15. The negative pressure mechanism (such as an electric negative pressure pump) sucks the urine storage bag 2 to form a continuous negative pressure to promote bladder emptying.
[0089] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0090] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.
Claims
1. A bladder drainage drug infusion device, characterized by: The invention comprises a drainage tube (1), one end of which is connected to a urine storage bag (2), the other end of which is connected to the bladder via a first connecting tube (3), and a drug infusion mechanism symmetrically connected to both sides of the drainage tube (1), the drug infusion mechanism comprising a first connector (4) connected to the drainage tube (1), a one-way valve (5) being provided in the first connector (4), and the first connector (4) being connected to a drug infusion part.
2. The bladder drainage drug infusion device according to claim 1, characterized in that: The drug infusion portion comprises a second connecting pipe (6) connected to the first connector (4); an end of the second connecting pipe (6) away from the first connector (4) is connected to a medicine storage box (7); a spiral channel (8) is provided in the second connecting pipe (6); the spiral channel (8) is respectively connected to the first connector (4) and the medicine storage box (7).
3. The bladder drainage drug infusion device according to claim 2, characterized in that: A heating plate (9) is provided at one end of the second connecting pipe (6) close to the first joint (4), and the heating plate (9) is located outside the spiral channel (8).
4. The bladder drainage drug infusion device according to claim 1, characterized in that: The one-way valve (5) is a bionic fish gill-shaped one-way valve (5).
5. The bladder drainage drug infusion device according to claim 2, characterized in that: An electronic valve (10) is provided in the medicine storage box (7), and the electronic valve (10) is communicated with the spiral channel (8). A flow sensor (11) is provided in the flow guide tube (1), and the flow sensor (11) is electrically connected to the electronic valve (10).
6. The bladder drainage drug infusion device according to claim 1, characterized in that: A first through hole (12) is provided on both sides of the flow guide tube (1), the first joint (4) is located in the first through hole (12), a first groove (13) is symmetrically provided in the first through hole (12), a sealing ring (14) is provided in the first groove (13), and the sealing ring (14) abuts against the outer wall of the first joint (4).
7. The bladder drainage and drug infusion device according to claim 1, characterized in that: One end of the first connecting tube (3) extending into the bladder is connected to a shape memory alloy net bag.
8. The bladder drainage drug infusion device according to claim 1, characterized in that: The inner surface of the flow guide tube (1) is coated with a super-hydrophobic / antibacterial dual-functional nanomaterial.
9. The bladder drainage and drug infusion device according to claim 1, characterized in that: One end of the urine storage bag (2) is provided with a second connector (15), and the second connector (15) is connected to the interior of the flow guide tube (1) via a third connecting tube (16).
10. The bladder drainage and drug infusion device according to claim 9, characterized in that: One end of the urine storage bag (2) away from the second connector (15) is connected to a negative pressure mechanism.