ARM-based bladder volume monitoring system

Abstract

A bladder volume monitoring system based on Advanced Reduced Instruction Set Computing Machines (ARM), characterized in that it comprises: a three-chamber urinary catheter (2), an air supply channel (26), a fluid supply channel (25), and a fluid drainage channel (27); wherein one end of the three-chamber urinary catheter (2) is positioned inside a bladder (24) during use, and the other end of the three-chamber urinary catheter (2) is provided with three openings, each being an air opening (21), a fluid supply opening (22), and a fluid drainage opening (23); wherein the air inlet end of the air supply channel (26) is connected to an external air source, and the air outlet end of the air supply channel (26) is connected to the air opening (21);wherein the fluid inlet end of the fluid supply channel (25) is connected to an external fluid container and the fluid outlet end of the fluid supply channel (25) is connected to the fluid supply port (22); wherein the fluid inlet end of the fluid drainage channel (27) is connected to the fluid drainage port (23) and the fluid outlet end of the fluid drainage channel (27) is connected to an external container; wherein the end of the three-chamber urinary catheter (2) located inside the bladder (24) is provided with several three-chamber urinary catheter fluid inlet ports (22a) connected to the fluid supply port (22) and a three-chamber urinary catheter fluid drainage port (23a) connected to the fluid drainage port (23);wherein the end of the three-chamber urinary catheter (2) located inside the bladder (24) is further equipped with a balloon (20), and the balloon (20) is connected to the air opening (21); wherein a sensor (16) is arranged on the fluid supply channel (25), and the sensor (16) serves to monitor the pressure in the fluid supply channel (25) in order to determine the pressure in the bladder (24).

Description

Technical area

[0001] The present utility model relates to the technical field of medical devices, in particular a monitoring system for bladder volume based on Advanced Reduced Instruction Set Computing Machines (ARM). State of the art

[0002] The bladder is an important urinary storage organ in humans, and its anatomical location and physiological properties significantly influence radiation treatment planning for tumor irradiation. Located in the mid-pelvis, the bladder is a highly elastic, hollow muscular organ whose volume changes rapidly depending on its degree of urinary filling. Anatomically, the bladder is closely adjacent to pelvic organs such as the uterus and rectum, resulting in complex anatomical relationships. This specific anatomical location and these physiological properties pose a considerable challenge for the precise radiation therapy of pelvic tumors. In clinical practice, changes in bladder filling affect the radiation effect in several ways: First, a change in bladder volume directly leads to a shift in its position.Secondly, changes in bladder filling, due to the limited space within the pelvis, cause mechanical displacement of adjacent organs such as the uterus and rectum. Most importantly, these displacements further result in a shift of the tumor target areas adjacent to the bladder. Therefore, it is necessary to maintain a constant bladder filling level to preserve the position of the organs adjacent to the bladder and the associated tumors, improve the precision in delineating tumor target areas in the abdominal cavity, and thereby enhance the therapeutic effect of radiotherapy.

[0003] Known devices for monitoring bladder pressure involve a urinary catheter. The patient's bladder is emptied, and then a specific amount of physiological saline solution is infused into it to refill it. However, because emptying and fluid infusion occur via the same catheter, the patient is at risk of cross-infection. Furthermore, it is not possible to control the fluid inflow to regulate bladder pressure, meaning the bladder cannot be maintained at a constant level of fullness. Content of the utility model

[0004] To solve the aforementioned technical problems, the present utility model provides an ARM-based monitoring system for bladder volume.

[0005] This utility model provides an ARM-based bladder volume monitoring system. The monitoring system comprises a three-chamber urinary catheter, an air supply channel, a fluid supply channel, and a fluid drainage channel. One end of the three-chamber urinary catheter is positioned inside the bladder during use, and the other end of the catheter has three openings: an air inlet, a fluid supply inlet, and a fluid drainage inlet. The air inlet end of the air supply channel is connected to an external air source, and the air outlet end is connected to the air inlet. The fluid inlet end of the fluid supply channel is connected to an external fluid container, and the fluid outlet end is connected to the fluid supply inlet.The fluid inlet end of the drainage channel is connected to the drainage port, and the fluid outlet end of the drainage channel is connected to an external container. The end of the three-chamber urinary catheter located inside the bladder is equipped with several three-chamber catheter fluid inlet ports connected to the fluid inlet port, as well as one three-chamber catheter drainage port connected to the fluid outlet port. The end of the three-chamber urinary catheter located inside the bladder is also equipped with a balloon, which is connected to the air vent. A sensor is located on the fluid inlet channel, and this sensor monitors the pressure in the fluid inlet channel in order to determine the pressure in the bladder.

[0006] Optionally, a first normally closed solenoid valve and a first diaphragm gas-liquid pump are arranged in the air supply channel.

[0007] A third normally closed solenoid valve and a peristaltic pump are arranged in the liquid supply channel.

[0008] A second normally closed solenoid valve and a second diaphragm gas-liquid pump are arranged in the liquid drain channel. Optionally, the monitoring system further includes an enclosure, which is connected to the air supply channel, the liquid supply channel, and the liquid drain channel. A main control circuit board, a power supply, a touchscreen, and a single-board computer, in particular a Raspberry Pi (registered trademark), are further mounted inside the enclosure. The touchscreen is electrically connected to the single-board computer, and both are mounted to the top of the enclosure. The single-board computer is electrically connected to the main control circuit board.

[0009] Optionally, the sensor can be attached to the floor inside the housing using several short support rods.

[0010] Optionally, the main control circuit board also includes a buzzer, and the buzzer is used to indicate the degree of bladder fullness.

[0011] Optionally, the touchscreen also includes an emergency stop button.

[0012] Optionally, several normally closed solenoid valves, several diaphragm gas-liquid pumps and the peristaltic pump are connected at their ends using cable ties and snap fasteners when connecting to connecting lines.

[0013] The technical solution provided by the embodiment of the present utility model offers the following advantages over the prior art: The embodiment of the present utility model consists of the three-chamber urinary catheter, the air supply channel, the fluid supply channel, and the fluid drainage channel. At one end of the three-chamber urinary catheter, three independent openings are provided, namely the air opening, the fluid supply opening, and the fluid drainage opening, each connected to the air supply channel, the fluid supply channel, and the fluid drainage channel, respectively. At the other end, an inflatable balloon is provided, which, after inflation, can securely anchor the bladder neck. A pressure sensor is integrated into the fluid supply channel, which can monitor the pressure in the bladder in real time and transmit it wirelessly to a monitoring terminal.The air supply channel is connected to an external air source and provides controllable air pressure for the balloon. The fluid supply channel infuses fluid into the bladder via a flow control valve, while the fluid drainage channel removes excess fluid by negative pressure suction. The three channels do not overlap, thus preventing cross-infection. The inflated balloon ensures anatomical fixation and reduces the risk of catheter displacement. The sensor monitors bladder pressure in real time to control the start and stop of the fluid supply and drainage channels. Description of the attached drawings Fig. Figure 1 is a front view of an ARM-based bladder volume monitoring system according to an embodiment of the present utility model; Fig. Figure 2 is a schematic representation of the internal structure of the ARM-based bladder volume monitoring system according to an embodiment of the present utility model; Fig. Figure 3 is a schematic representation of the connection of a three-chamber urinary catheter according to an embodiment of the present utility model; Fig. Figure 4 is a schematic representation of the connection structure between a third protective plate, a valve-pump device and a sensor according to an embodiment of the present utility model; Fig. Figure 5 is a schematic representation of the connection structure between a third normally closed solenoid valve, a peristaltic pump and the sensor according to an embodiment of the present utility model; Fig. Figure 6 is a schematic representation of the connection structure between a first protective plate and a main control circuit board according to an embodiment of the present utility model. Explanation of reference symbols:

[0014] 1-Main control board; 2-Triple chamber urinary catheter; 4-Power supply; 5-Touchscreen; 6-Housing; 7-Single-board computer; 8-Third guard plate; 9-First guard plate; 901-Rectangular channel; 10-Second guard plate; 12a-First normally closed solenoid valve; 12b-Second normally closed solenoid valve; 12c-Third normally closed solenoid valve; 13a-First diaphragm gas-liquid pump; 13b-Second diaphragm gas-liquid pump; 14-Peristaltic pump; 15-Switch; 16-Sensor; 19-Polygonal channel; 20-Balloon; 21-Air port; 22-Liquid inlet port; 23-Liquid outlet port; 22a-Three-chamber urinary catheter fluid inlet; 23a-Three-chamber urinary catheter fluid outlet; 24-Urinary bladder; 25-Fluid supply channel; 26-Air supply channel; 27-Fluid drainage channel. Examples of implementation

[0015] In the following, a specific embodiment of the present utility model is described in detail with reference to the attached drawings, whereby it can be seen that the scope of protection of the present utility model is not limited by the specific embodiment.

[0016] In describing this utility model, it should be noted that the terms "central", "longitudinal direction", "transverse direction", "length", "width", "thickness", "top", "bottom", "front", "back", "left", "right", "vertical", "horizontal", "top surface", "bottom surface", "interior", "exterior", "axial direction", "radial direction", "circumferential direction", etc., represent specified orientation or position relationships based on those shown in the drawings. These terms serve only to facilitate the description of the technical solution of this utility model and to simplify the description; however, they do not specify a particular orientation or suggest that the device or element in question must be designed and operated in a specific orientation. Therefore, they must not be interpreted as limiting this utility model.

[0017] The present utility model is explained below with reference to several specific embodiments. For the sake of clarity and conciseness, detailed descriptions of known functions and components may be omitted. If any component of the embodiments of the present utility model appears in more than one figure, it may be represented in each figure by the same reference numeral.

[0018] As in Fig. 1, Fig. 2 and Fig. Figure 3 shows that the embodiment of the present utility model provides an ARM-based bladder volume monitoring system comprising: a three-chamber urinary catheter 2, an air supply channel 26, a fluid supply channel 25, and a fluid drainage channel 27. One end of the three-chamber urinary catheter 2 is positioned inside a bladder 24 during use, and the other end of the three-chamber urinary catheter 2 is provided with three openings, each being an air opening 21, a fluid supply opening 22, and a fluid drainage opening 23. The air inlet end of the air supply channel 26 is connected to an external air source, and the air outlet end of the air supply channel 26 is connected to the air opening 21.The fluid inlet end of the fluid supply channel 25 is connected to an external fluid container, and the fluid outlet end of the fluid supply channel 25 is connected to the fluid supply port 22. The fluid inlet end of the fluid drainage channel 27 is connected to the fluid drainage port 23, and the fluid outlet end of the fluid drainage channel 27 is connected to an external container. The end of the three-chamber urinary catheter 2 located inside the bladder 24 is provided with several three-chamber urinary catheter fluid inlet ports 22a connected to the fluid supply port 22, and with one three-chamber urinary catheter fluid drainage port 23a connected to the fluid drainage port 23. The end of the three-chamber urinary catheter 2, located inside the bladder 24, is further equipped with a balloon 20, and the balloon 20 is connected to the air opening 21.A sensor 16 is arranged on the fluid supply channel 25, and the sensor 16 serves to monitor the pressure in the fluid supply channel 25 in order to determine the pressure in the bladder 24.

[0019] Specifically, the fluid drainage channel 27 aspirates excess fluid from the bladder 24. The air supply channel 26 pumps air into the balloon 20, which, after inflation, tightly seals the bladder neck of the bladder 24. The first end of the fluid supply channel 25 is connected to an external fluid. The sensor 16 is a high-precision sensor capable of performing high-precision, real-time pressure monitoring of micropressure differences in the range of 0–250 Pa. The balloon 20 is a membrane that surrounds the three-chamber urinary catheter 2. It inflates when pumped through the air supply channel 26, thus sealing the bladder neck.

[0020] The embodiment of the present utility model consists of the three-chamber urinary catheter 2, the air supply channel 26, the fluid supply channel 25, and the fluid drainage channel 27. The three-chamber urinary catheter 2 is made of flexible silicone material. At one end, three independent ports are provided: the air port 21, the fluid supply port 22, and the fluid drainage port 23, each connected to the air supply channel 26, the fluid supply channel 25, and the fluid drainage channel 27, respectively. At the other end, an inflatable balloon 20 is provided, which, after inflation, stably fixes the bladder neck of the bladder 24. The pressure sensor 16 is integrated into the fluid supply channel 25 and can monitor the pressure in the fluid supply channel 25 in real time. Since the fluid supply channel 25 is connected to the bladder 24 via the three-chamber urinary catheter 2, the pressure in the fluid supply channel 25 corresponds to the pressure in the bladder 24.The pressure value is transmitted wirelessly to the monitoring device. The air supply channel 26 is connected to an external air source and provides a controllable air pressure for the balloon 20. The fluid supply channel 25 introduces fluid into the bladder 24 via a flow control valve, while the fluid drainage channel 27 removes excess fluid by vacuum suction.

[0021] First, the second end of the three-chamber urinary catheter 2 is inserted into the bladder 24. Air is pumped through the air inlet end into the balloon 20 via the air supply channel 26, causing the balloon 20 to inflate and be stably fixed at the neck of the bladder 24, thus creating a closed measuring environment. During system operation, the pressure sensor 16 monitors the pressure in the bladder 24 in real time. If the pressure falls below the set threshold, the bladder 24 must be inflated. The main control system then activates the fluid supply channel 25.Physiological saline solution enters the fluid supply channel 25 via the fluid inlet end of the fluid supply channel 25, flows through the fluid outlet end of the fluid supply channel 25 into the three-chamber urinary catheter 2, and through the three-chamber urinary catheter fluid inlet 22a of the three-chamber urinary catheter 2 into the bladder 24 to deliver physiological saline solution into the bladder 24 at an adjustable rate. If the pressure exceeds the set threshold, the fluid drainage channel 27 is immediately activated. Excess fluid in the bladder 24 flows through the three-chamber urinary catheter fluid drainage port 23a, through the fluid drainage port 23, into the fluid drainage channel 27, and is drained through the fluid outlet end of the fluid drainage channel 27. The volume in the bladder 24 is determined based on the set pressure range.In the event of a sudden pressure increase, fluid drainage is activated first to ensure safety. This prevents damage from overfilling of the bladder and avoids measurement errors due to insufficient pressure. The physiological process of normal urination is perfectly simulated. This is particularly suitable for rehabilitation training of neurogenic bladder dysfunction and postoperative assessment of bladder function. The modular design ensures ease of use while effectively reducing the risk of infection.

[0022] Optionally, a first normally closed solenoid valve 12a and a first diaphragm gas-liquid pump 13a are available with reference to Fig. 4 arranged in the air supply duct 26.

[0023] A third normally closed solenoid valve 12c and a peristaltic pump 14 are arranged in the liquid supply channel 25.

[0024] A second normally closed solenoid valve 12b and a second diaphragm gas-liquid pump 13b are arranged in the liquid drain channel 27.

[0025] Specifically, the operating frequency of the normally closed solenoid valve is approximately 300 times per minute, with a response time of approximately 25 ms. The faster response speed improves the system's real-time capability.

[0026] In the fluid supply channel 25, the first end of the third normally closed solenoid valve 12c and the first end of the peristaltic pump 14 are connected by a connecting line. The second end of the peristaltic pump 14 is connected to a long connecting line that passes through a polygonal channel 19 and is connected to an external supply of physiological saline solution to draw fluid from outside the body and deliver it to the bladder 24. The second end of the third normally closed solenoid valve 12c is connected to the sensor 16 by a short connecting line. The connecting line located near the sensor 16 is connected to the fluid supply port 22 of the three-chamber urinary catheter 2.

[0027] In the fluid drainage channel 27, the first end of the second normally closed solenoid valve 12b and the first end of the second diaphragm gas-liquid pump 13b are connected by a short connecting line. The second end of the second diaphragm gas-liquid pump 13b is connected by a connecting line to the fluid drainage port 23 of the three-chamber urinary catheter 2 inserted into the bladder 24, in order to aspirate fluid from the bladder 24. The second end of the second normally closed solenoid valve 12b is connected to a long connecting line that passes through the polygonal channel 19 and is connected to an external container to transport the aspirated fluid from the bladder 24 to the outside.

[0028] The first end of the first normally closed solenoid valve 12a and the first end of the first diaphragm gas-liquid pump 13a are connected by a short connecting line. The second end of the first diaphragm gas-liquid pump 13a is connected to a connecting line that is connected to external air to draw air from the environment. The second end of the first normally closed solenoid valve 12a is connected by a long connecting line to the balloon line of the three-chamber urinary catheter 2. The balloon 20 of the three-chamber urinary catheter 2 inflates with air drawn in from the surroundings and secures the bladder neck of the bladder 24. If the air in the balloon 20 of the three-chamber urinary catheter 2 needs to be released, the connection between the long connecting tube and the balloon tube of the three-chamber urinary catheter 2 can be disconnected, and the air in the balloon 20 of the three-chamber urinary catheter 2 will be automatically released.

[0029] Optionally, the monitoring system includes, with reference to Fig. 2. Furthermore, a housing 6, and the housing 6 is connected to the air supply duct 26, the liquid supply duct 25, and the liquid discharge duct 27. A main control circuit board 1, a power supply 4, a touchscreen 5, and a single-board computer 7 are also mounted inside the housing 6. The touchscreen 5 is electrically connected to the single-board computer 7, and both are mounted on the top of the housing 6. The single-board computer 7 is electrically connected to the main control circuit board 1.

[0030] Specifically, a power switch 15 is attached to the housing 6. The power switch 15 comprises a first power switch and a second power switch. The entire system device can only be activated when both the first power switch and the second power switch are switched on.

[0031] The main control circuit board 1 is attached to the first protective plate 9 by several screws. Rectangular channels 901 are provided at the four corners of the first protective plate 9, see Fig. 6. All connecting cables below the first protective plate 9 must be routed through the rectangular channels 901 to connect to the main control circuit board 1. Simultaneously, all connecting cables inside the housing 6 are routed along the inner surface of the housing 6 or the surface of the first protective plate 9.

[0032] The main control circuit board 1, the sensor 16, the valve-pump unit, the power supply 4, the touchscreen 5, and the single-board computer 7 are all installed inside the housing 6. Switches 15 are mounted on the front and back of the housing 6. The touchscreen 5 is electrically connected to the single-board computer 7, and both are installed on the top of the housing 6. The single-board computer 7 is connected to the main control circuit board 1 via electrical components. The main control circuit board 1 is attached to the first protective plate 9 and is installed in the first middle level of the housing 6. The power supply 4 is attached to the second protective plate 10. The second protective plate 10 is secured in the second middle level of the housing 6 by several long support rods.

[0033] The other end of the multiple support rods is attached to the third protective plate 8. The third protective plate 8 is attached to the bottom inside the housing 6. The sensor 16 is connected to the valve-pump unit by water pipe components, and both are attached to the third protective plate 8. The valve-pump unit has a structure of three groups, each containing a valve and a pump, with the valve and pump connected by short connecting lines. The three groups, each containing a valve and a pump, are divided into the liquid supply channel 25, the liquid discharge channel 27, and the air supply channel 26. Both ends of the liquid supply channel 25, the liquid discharge channel 27, and the air supply channel 26 are connected to several long connecting lines that lead out of the housing 6 through the polygonal channel 19 located on the underside of the housing side.

[0034] The single-board computer 7 generates corresponding control commands based on the operator's specific actions on the touchscreen 5 control surface and sends these commands to the main control board 1 via a serial interface. Simultaneously, it receives status information from the peripheral devices, transmitted by the sub-unit, thus enabling the control of starting and stopping the pumps and opening and closing the valves. This facilitates precise control of the entire monitoring system and the fulfillment of clinical requirements.

[0035] Sensor 16 can perform highly precise, real-time pressure monitoring of micro-pressure differences in the range of 0-250 Pa. Furthermore, sensor 16 contains a micromechanically machined silicon diaphragm. When pressure is applied to the sensitive diaphragm of sensor 16, the diaphragm deforms, thereby changing the internal resistance of sensor 16. These resistance changes are converted into voltage signals via a Wheatstone bridge circuit, subsequently converted into digital signals via an analog-to-digital converter (ADC), subjected to temperature compensation and calibration, and output to the main control circuit board 1.

[0036] Simultaneously, the output value of sensor 16 can be read directly as Pa to represent the current pressure value without the need for complex conversion formulas. A fixed pressure range is defined in the program of the YDRP2040 microcontroller on the main control board 1, independent of individual variations. If the dynamic pressure in bladder 24, monitored by the main control board 1, falls below this fixed pressure range, the system automatically activates the third normally closed solenoid valve 12c and the peristaltic pump 14 of the fluid supply channel 25 to supply fluid to bladder 24.If the dynamic pressure in bladder 24, monitored by the main control board 1, exceeds the fixed pressure range, the system automatically activates the second normally closed solenoid valve 12b and the second diaphragm gas-liquid pump 13b of the fluid drainage channel 27 to drain the fluid from bladder 24 to the outside. If the pressure monitored by the main control board 1 is within the fixed pressure range, the valve-pump control circuit of the main control board 1 stops all currently operating valves and pumps and emits an audible signal. Simultaneously, sensor 16 continues to monitor the pressure in bladder 24 in real time and transmits this information to the main control board 1, thereby maintaining the pressure in bladder 24 continuously within a constant pressure range. This ensures that bladder 24 maintains a constant level of filling throughout the surgical procedure.

[0037] Optionally, sensor 16 is available with reference to Fig. 5 secured by several short support rods on the floor inside the housing 6.

[0038] Sensor 16 is secured to the floor inside housing 6 by several short support rods. The connecting line at one end of the third normally closed solenoid valve 12c is connected to the corresponding ports of sensor 16 via a "TT"-shaped hose connector and connecting lines. One port of sensor 16 is connected via a connecting line to the fluid supply line of the three-chamber urinary catheter 2 inserted into bladder 24 to monitor the dynamic pressure in bladder 24. In the "TT"-shaped connection, both ends of the horizontal connecting line are secured to two long support rods by fastening straps. The "TT"-shaped connection is directly visible when viewing the devices on the floor inside housing 6.Simultaneously, the connecting cables are clamped to the sensor 16 terminals using snap fasteners or cable ties to ensure the tightness and reliability of the pressure measurement. This type of fastening effectively prevents liquid from entering the sensor 16, while simultaneously ensuring normal system operation, optimizing space utilization, making the overall structure more compact, shortening the cable length, reducing the risk of liquid build-up and contamination, facilitating quick assembly, disassembly, and maintenance, ensuring a seamless connection between the sensor 16 and the piping system, and improving the real-time capability and accuracy of pressure monitoring.It is suitable for clinical scenarios where bladder pressure needs to be frequently monitored, and while ensuring functional reliability, it significantly improves the portability and ease of use of the device.

[0039] Optionally, the main control circuit board 1 also includes a buzzer, which serves to acoustically indicate the status of the system and the filling level of the bladder 24.

[0040] When the control unit for the lines is switched on, the buzzer on the main control circuit board 1 sounds for 0.5 seconds to indicate that all system components are ready for operation, thus ensuring normal system operation. When the air supply channel 26 is activated, it runs automatically for 3 seconds according to the program setting and then stops. The air supply channel 26, consisting of the first normally closed solenoid valve 12a and the first diaphragm gas-liquid pump 13a, runs automatically for a set time and then stops, causing the balloon 20 of the catheter to inflate to a constant degree each time and seal the bladder neck of the bladder 24. The buzzer on the main control circuit board 1 emits a short tone of 0.15 seconds as an indication when the air supply channel 26 opens and closes.The main control circuit board 1 stops all actions of the normally closed solenoid valves, the peristaltic pump 14, and the diaphragm gas-liquid pump in the system via the valve-pump control circuit. Simultaneously, a buzzer sounds for 0.5 seconds to indicate that all devices in the system have ceased operation.

[0041] Optionally, the touchscreen 5 also includes an emergency stop button.

[0042] The device is equipped with a human-machine interface via touchscreen 5, which displays four functional modules: air supply channel 26, fluid drainage channel 27, fluid supply channel 25, and control unit start and stop. In the event of sudden acute cardiac arrest, shock, or other patient emergencies, medical personnel immediately press the stop button on touchscreen 5 to start and stop the control unit lines. The control unit start and stop module controls the start and stop of the entire system. By clicking the start or stop button on touchscreen 5, the single-board computer 7 generates the corresponding control commands to start or stop the system and transmits them to the main control circuit board 1.The control unit start / stop module immediately interrupts the operation of all lines to ensure a safe shutdown of the device. This function is implemented based on the embedded control system of the single-board computer 7. The emergency stop command is quickly processed by the main control circuit board 1, simultaneously shutting down the air pump, the fluid supply module, and the vacuum suction module to prevent further medical risks. Optionally, the ends of the normally closed solenoid valves, the diaphragm gas / liquid pumps, and the peristaltic pump 14 are connected to the connecting lines using cable ties and snap fasteners.

[0043] The pipe connections utilize a dual fastening design consisting of cable ties and snap fasteners. At the connection points of the normally closed solenoid valve, the diaphragm gas / liquid pump, and the 14-piece peristaltic pump with its connecting lines, ring-shaped medical-grade nylon cable ties are used to ensure a tight fit. These are further reinforced with quick-release snap fasteners (embedded silicone seals). The normally closed solenoid valve uses a combination of a barb connection and a snap fastener. The diaphragm gas / liquid pump is secured with double cable ties in a crisscross pattern for vibration resistance. The 14-piece peristaltic pump is equipped with transparent snap fasteners to allow monitoring of the fluid flow. This design enhances connection reliability.The double fastening resists tensile stress on the tubing caused by device movement or patient repositioning, thus increasing the tightness. The snap-lock seals can withstand a fluid flow of ≤ 200 mL / min or a gas flow of ≤ 30 L / min to prevent high-pressure leaks. This facilitates rapid maintenance, as disassembly is possible without tools, thus meeting infection control requirements. The transparent snap-lock design allows for real-time monitoring of the tubing's condition. The cable ties are passivated to prevent sharp edge injuries. This modular concept ensures connection strength while significantly reducing the complexity of clinical operation.

[0044] The above embodiments of the utility model merely represent several specific examples of the present utility model. However, the embodiments of the present utility model are not limited to these. Any modifications that a person skilled in the art in this field could conceive should fall within the scope of protection of the present utility model.

Claims

[1] A bladder volume monitoring system based on Advanced Reduced Instruction Set Computing Machines (ARM): advanced computer with reduced instruction set, characterized by, comprising: a three-chamber urinary catheter (2), an air supply channel (26), a fluid supply channel (25), and a fluid drainage channel (27); wherein one end of the three-chamber urinary catheter (2) is positioned inside a bladder (24) when in use, and the other end of the three-chamber urinary catheter (2) is provided with three openings, each being an air opening (21), a fluid supply opening (22), and a fluid drainage opening (23); wherein the air inlet end of the air supply channel (26) is connected to an external air source, and the air outlet end of the air supply channel (26) is connected to the air opening (21); wherein the fluid inlet end of the fluid supply channel (25) is connected to an external fluid container, and the fluid outlet end of the fluid supply channel (25) is connected to the fluid supply opening (22);wherein the fluid inlet end of the fluid drainage channel (27) is connected to the fluid drainage opening (23) and the fluid outlet end of the fluid drainage channel (27) is connected to an external container; wherein the end of the three-chamber urinary catheter (2) located inside the bladder (24) is provided with several three-chamber urinary catheter fluid inlet openings (22a) connected to the fluid inlet opening (22) and a three-chamber urinary catheter fluid drainage opening (23a) connected to the fluid drainage opening (23); wherein the end of the three-chamber urinary catheter (2) located inside the bladder (24) is further provided with a balloon (20), and the balloon (20) is connected to the air vent (21); wherein a sensor (16) is arranged on the fluid supply channel (25), and the sensor (16) serves to monitor the pressure in the fluid supply channel (25) in order to determine the pressure in the bladder (24). [2] The ARM-based bladder volume monitoring system according to claim 1, characterized by , that a first normally closed solenoid valve (12a) and a first diaphragm gas-liquid pump (13a) are arranged in the air supply channel (26); a third normally closed solenoid valve (12c) and a peristaltic pump (14) are arranged in the liquid supply channel (25); a second normally closed solenoid valve (12b) and a second diaphragm gas-liquid pump (13b) are arranged in the liquid drain channel (27). [3] The ARM-based bladder volume monitoring system according to claim 1, characterized by, further comprising a housing (6), and the housing (6) being connected to the air supply channel (26), the liquid supply channel (25) and the liquid discharge channel (27); wherein inside the housing (6) a main control circuit board (1), a power supply (4), a touchscreen (5) and a single-board computer (7) are further attached; wherein the touchscreen (5) is electrically connected to the single-board computer (7) and both are attached to the top of the housing (6); wherein the single-board computer (7) is electrically connected to the main control circuit board (1). [4] The ARM-based bladder volume monitoring system according to claim 1, characterized by , that the sensor (16) is attached to the floor inside the housing (6) via several short support rods (18). [5] The ARM-based bladder volume monitoring system according to claim 3, characterized by, that the main control circuit board (1) further includes a buzzer, and the buzzer serves to indicate the degree of filling of the bladder (24). [6] The ARM-based bladder volume monitoring system according to claim 3, characterized by , that the touchscreen (5) also includes an emergency stop button. [7] The ARM-based bladder volume monitoring system according to claim 2, characterized by , that the ends of the first normally closed solenoid valve (12a), the second normally closed solenoid valve (12b), the second diaphragm gas liquid pump (13b), the first diaphragm gas liquid pump (13a), the third normally closed solenoid valve (12c) and the peristaltic pump (14) are connected with connecting leads using cable ties and snap fasteners.

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