A hemodialysis tubing securement device and method for easy connection

Abstract

The application provides a hemodialysis pipeline fixing device and method convenient to connect. A protective cover on a closed fixing seat is closed to a predetermined position, a limit switch is triggered, and when the pipeline exists, a pipeline correct placement signal is output. In response to a start instruction, a controller starts a micro air pump connected with an air path of the fixing seat, controls the micro air pump to inflate a sealed air bag arranged between a second pressing block and a bottom of a U-shaped groove, pushes the second pressing block to move to the first pressing block, and thus uniformly presses a target dialysis pipeline. When a monitored pressing force value reaches a preset safety threshold range and the target dialysis pipeline is effectively blocked, the controller controls the micro air pump to stop inflation, maintains air pressure in the air bag through a pressure maintaining valve, and at the same time, a state indicating lamp is lighted to indicate that the target dialysis pipeline has been correctly pressed. The scheme of the application can realize automatic pipeline pressing with accurate and controllable pressing force and multiple safety confirmations.

Description

Technical Field

[0001] This application relates to the field of tubing fixation technology, and in particular to a hemodialysis tubing fixation device and method that facilitates connection. Background Technology

[0002] During hemodialysis treatment, temporary clamping of the dialysis tubing is necessary to regulate flow or achieve occlusion, such as when changing infusion bags, handling alarms, or connecting new tubing. Currently, the commonly used clinical methods for tubing clamping are manual roller clamps or knob-type clamps. The operator adjusts the clamp spacing by rotating the rollers or knobs, thereby clamping the tubing.

[0003] However, this manual operation method has the following drawbacks: First, the clamping force relies entirely on the operator's feel and experience, making it difficult to control precisely. Too loose a force may cause the tubing to slip or fail to effectively block blood flow, while too tight a force may damage the inner wall of the tubing or even affect blood cells, posing a safety hazard to the patient. Second, the manual operation steps are cumbersome, requiring manual adjustment each time the force is applied, which is not conducive to simplifying and standardizing the treatment process. In addition, traditional clamps lack a detection mechanism to check whether the tubing is correctly positioned. If the tubing is not properly positioned before clamping, it can easily cause bias or clamping failure. At the same time, existing devices only rely on mechanical limits to indirectly control the degree of clamping, and cannot monitor the actual clamping force and tubing open / closed status in real time, making it difficult to ensure the reliability of the blocking effect. Therefore, how to achieve automated tubing clamping with precise and controllable clamping force and multiple safety verifications has become a challenge for the industry. Summary of the Invention

[0004] Based on this, this application provides a convenient hemodialysis tubing fixing device and method for achieving automated tubing clamping with precise and controllable clamping force and multiple safety verifications.

[0005] In a first aspect, this application provides an auxiliary clamping method for hemodialysis tubing, applied to a hemodialysis tubing fixing device for easy connection, the method comprising the following steps: The target dialysis tubing is pre-placed into the U-shaped groove of the fixing seat, and the protective cover on the fixing seat is closed so that the first pressure block on the protective cover is opposite to the second pressure block at the bottom of the U-shaped groove; When the protective cover is closed to the predetermined position, the limit switch is triggered. The limit switch sends a ready signal to the controller. When the pipeline presence sensor located at the bottom of the U-shaped groove detects the presence of the pipeline, the controller outputs a pipeline correct placement signal. In response to the start command issued by the operator, the controller starts the micro air pump connected to the air circuit of the fixed seat and controls the micro air pump to inflate the sealed air bag located between the second pressure block and the bottom of the U-shaped groove, so that the sealed air bag expands to push the second pressure block to move towards the first pressure block, thereby uniformly compressing the target dialysis tubing with a preset pressure. The controller monitors the clamping force in real time by means of a pressure sensor installed on the sealed airbag, and detects the on / off status of the target dialysis tubing. When the monitored clamping force value reaches the preset safety threshold range and the target dialysis tubing is detected to be effectively blocked, the controller controls the micro air pump to stop inflating and maintains the air pressure in the airbag through the pressure holding valve. At the same time, the status indicator light is lit to indicate that the target dialysis tubing has been properly clamped.

[0006] In some embodiments, when the protective cover is closed to a predetermined position, a limit switch is triggered, and the limit switch sends a ready signal to the controller, specifically including: When the protective cover is closed to the predetermined position, the trigger protrusion on the lower surface of the protective cover presses against the contact of the limit switch; When the internal contacts of the limit switch close, a level transition signal is generated. The level transition signal is transmitted to the input terminal of the controller via a wire as a ready signal.

[0007] In some embodiments, when a pipe presence sensor located at the bottom of the U-shaped groove detects the presence of a pipe, the controller outputs a pipe placement correct signal, specifically including: The in-situ sensor continuously emits a detection beam and receives reflected light to monitor whether the target dialysis tubing is present in the U-shaped groove; When the target dialysis tubing is present, the light intensity received by the tubing presence sensor changes, causing the level of its output pin to jump from low to high, generating a tubing presence signal; The controller reads the level status of the output pin of the pipeline in-place sensor. If a high level is detected and a ready signal has been received from the limit switch, the controller determines that both conditions are met simultaneously and outputs a high level from its output port as a signal that the pipeline is correctly placed.

[0008] In some embodiments, in response to a start command issued by an operator, the controller starts a miniature air pump connected to the air circuit of the fixed base, specifically including: When the operator presses the enabled start button, the contacts of the start button close, generating a level transition signal as a start command; The start command is transmitted to the input terminal of the controller via a wire; After detecting the start command, the controller outputs a high-level control signal from its output port to the drive circuit of the micro air pump connected to the air circuit of the fixed base, so that the micro air pump is powered on and started.

[0009] In some embodiments, controlling the micro air pump to inflate a sealed airbag disposed between the second pressure block and the bottom of the U-shaped groove, causing the sealed airbag to expand, thereby pushing the second pressure block toward the first pressure block, and thus uniformly compressing the target dialysis tubing at a preset pressure, specifically includes: After the miniature air pump is started, compressed air is continuously pumped into the sealed airbag through the air passage; The sealed airbag expands after being inflated, thereby pushing upwards against the second pressure block that is in contact with it. The second pressure block moves along the guide structure towards the first pressure block under the thrust of the sealed airbag, thereby reducing the gap between the second and the first pressure block. When the gap is smaller than the outer diameter of the target dialysis tubing, the target dialysis tubing is squeezed. The clamping force increases as the air pressure inside the sealed airbag increases until a preset pressure value is reached, so that the target dialysis tubing is uniformly clamped.

[0010] In some embodiments, the pressure sensor disposed on the sealed airbag monitors the clamping force in real time, and simultaneously detects the on / off status of the target dialysis tubing, specifically including: The pressure sensor installed on the sealed airbag collects the air pressure value inside the sealed airbag in real time, and converts the air pressure value into an analog voltage signal and transmits it to the analog input port of the controller. The pipeline continuity detection device monitors the continuity status of the target dialysis pipeline in real time and transmits a digital level signal indicating whether the pipeline is unobstructed or blocked to the digital input port of the controller. The controller periodically reads the analog voltage signal from the pressure sensor through its analog input port and converts it into the corresponding clamping force value. At the same time, it reads the digital level signal from the target dialysis tubing on / off detection device through its digital input port, thereby synchronously obtaining the current clamping force value and the on / off status of the target dialysis tubing.

[0011] In some embodiments, when the monitored clamping force reaches a preset safety threshold range and the target dialysis tubing is detected to be effectively blocked, the controller controls the micro air pump to stop inflating and maintains the air pressure inside the airbag through the pressure-holding valve, while simultaneously illuminating the status indicator light to indicate that the target dialysis tubing has been correctly clamped. Specifically, this includes: The controller compares the real-time clamping force value with a preset safety threshold range and determines whether the voltage level of the pipeline continuity detection device is an effective level indicating that the target dialysis pipeline has been blocked. When the clamping force is within the safety threshold range and the on / off state is an effective level of being blocked, the controller outputs a stop signal from its first output port to the drive circuit of the micro air pump, causing the micro air pump to be de-energized and stop working. The controller simultaneously outputs a pressure holding control signal from its second output port to the pressure holding valve connected to the air circuit, causing the pressure holding valve to activate and lock the air pressure inside the sealed airbag. The controller simultaneously outputs a lighting signal from its third output port to the status indicator light, causing the status indicator light to illuminate and indicating that the target dialysis tubing has been properly clamped.

[0012] Secondly, this application provides a hemodialysis tubing fixing device that facilitates connection. The device includes an auxiliary clamping unit, which comprises: The pretreatment module is used to pre-place the target dialysis tubing into the U-shaped groove of the fixing seat, close the protective cover on the fixing seat, and make the first pressure block on the protective cover face the second pressure block at the bottom of the U-shaped groove; The processing module is used to trigger a limit switch when the protective cover is closed to a predetermined position. The limit switch sends a ready signal to the controller. When the pipeline in-situ sensor located at the bottom of the U-shaped groove detects the presence of the pipeline, the controller outputs a pipeline correctly placed signal. The processing module is also used to respond to the start command issued by the operator. The controller starts the micro air pump connected to the air circuit of the fixed seat and controls the micro air pump to inflate the sealed air bag set between the second pressure block and the bottom of the U-shaped groove, so that the sealed air bag expands to push the second pressure block to move towards the first pressure block, thereby uniformly pressing the target dialysis tubing with a preset pressure. The execution module is used to monitor the clamping force in real time through a pressure sensor installed on the sealed airbag, and at the same time detect the on / off status of the target dialysis tubing. When the monitored clamping force value reaches the preset safety threshold range and the target dialysis tubing is detected to be effectively blocked, the controller controls the micro air pump to stop inflating and maintains the air pressure in the airbag through the pressure holding valve, while illuminating the status indicator light to indicate that the target dialysis tubing has been properly clamped.

[0013] Thirdly, this application provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps of the above-described auxiliary clamping method for hemodialysis tubing.

[0014] Fourthly, this application provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the above-described auxiliary clamping method for hemodialysis tubing.

[0015] The technical solutions provided by the embodiments disclosed in this application have the following beneficial effects: The hemodialysis tubing fixing device and method provided in this application, which facilitates connection, firstly, places the target dialysis tubing into the U-shaped groove of the fixing base, and closes the protective cover on the fixing base, so that the first pressure block on the protective cover aligns with the second pressure block at the bottom of the U-shaped groove. This step enables rapid insertion of the target dialysis tubing and reliable closure of the protective cover, ensuring accurate alignment of the first and second pressure blocks and providing a stable mechanical basis for subsequent precise clamping, thereby improving the convenience of operation and the accuracy of clamping. Secondly, when the protective cover is closed to a predetermined position, a limit switch is triggered. The limit switch sends a ready signal to the controller, and when the pipeline presence sensor located at the bottom of the U-shaped groove detects the presence of the pipeline, the controller outputs a pipeline correct placement signal. This step provides dual safety confirmation of the protective cover being closed in place and the pipeline being correctly placed, preventing accidental activation of the clamping mechanism if the pipeline is not properly positioned or the protective cover is not tightly closed. Then, in response to the start command issued by the operator, the controller starts the miniature air pump connected to the air circuit of the fixed seat and controls the miniature air pump to inflate the sealed airbag located between the second pressure block and the bottom of the U-shaped groove, so that the sealed airbag... The bladder inflates to push the second pressure block toward the first pressure block, thereby uniformly compressing the target dialysis tubing with a preset pressure. This step enables an automatic compression process driven by pneumatics. By uniformly applying pressure through the bladder, the second pressure block moves smoothly toward the first pressure block, precisely compressing the tubing with a preset pressure value, thus improving the consistency of the compression force. Finally, a pressure sensor installed on the sealed bladder monitors the compression force in real time and detects the on / off status of the target dialysis tubing. When the monitored compression force value reaches a preset safety threshold range and the target dialysis tubing is detected to be effectively blocked, the compression is initiated. When the controller stops inflating the micro air pump and maintains the air pressure inside the airbag through the pressure-holding valve, it illuminates the status indicator light to indicate that the target dialysis tubing has been correctly clamped. This step enables dual real-time monitoring of clamping force and tubing continuity. After reaching the safe pressure and confirming that the tubing is effectively blocked, it automatically stops inflating and locks the pressure, while providing clear status indications, thereby improving the reliability of the clamping effect and the intelligence level of the hemodialysis tubing fixation device. In summary, the solution of this application can achieve automated tubing clamping with precise and controllable clamping force and multiple safety confirmations. Attached Figure Description

[0016] Figure 1 This is an exemplary flowchart of an auxiliary clamping method for hemodialysis tubing according to some embodiments of this application; Figure 2 This is a schematic diagram illustrating an application scenario of an auxiliary compression data processing system according to some embodiments of this application; Figure 3This is a schematic diagram illustrating the correct placement of signals in the output conduit according to some embodiments of this application; Figure 4 This is a schematic diagram of the structure of the auxiliary clamping unit shown in some embodiments of this application; Figure 5 This is a schematic diagram of the structure of a computer device for implementing an auxiliary clamping method for hemodialysis tubing according to some embodiments of this application. Detailed Implementation

[0017] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0018] refer to Figure 1 The figure is an exemplary flowchart of an auxiliary clamping method for a hemodialysis tubing according to some embodiments of this application. The auxiliary clamping method for the hemodialysis tubing mainly includes the following steps: In step 101, the target dialysis tubing is placed into the U-shaped groove of the fixing seat in advance, and the protective cover on the fixing seat is closed so that the first pressure block on the protective cover is opposite to the second pressure block at the bottom of the U-shaped groove.

[0019] It should be noted that the first pressure block in this application is fixed inside the protective cover and is arranged opposite to the second pressure block. It is used to work together with the second pressure block to evenly wrap and press the target dialysis tubing during pressing. The second pressure block is slidably embedded in the bottom of the U-shaped groove of the fixing base. It is pushed upward when the airbag expands and cooperates with the first pressure block to press the target dialysis tubing.

[0020] In practice, the target dialysis tubing is pre-placed into the U-shaped groove of the mounting base, and the protective cover on the mounting base is closed. The first pressure block on the protective cover aligns with the second pressure block at the bottom of the U-shaped groove. This can be achieved as follows: First, the operator holds the target dialysis tubing and aligns it with the opening of the U-shaped groove on the upper surface of the mounting base. The U-shaped groove is injection molded from medical-grade polycarbonate, and its width is slightly larger than the outer diameter of the target dialysis tubing. For example, if the outer diameter of the tubing is 6 mm, the groove width is set to 6.5 mm, and the groove depth is approximately half the diameter of the tubing. A countersunk hole for installing a subsequent tubing in-situ sensor is reserved at the center of the bottom of the U-shaped groove. The operator gently presses down on the target dialysis tubing to embed it into the arc-shaped bottom surface of the U-shaped groove. The two side walls of the U-shaped groove have an elastic micro-tension structure to ensure that the tubing is properly seated after insertion. It will not detach on its own but is allowed to move axially. Subsequently, the operator manually rotates the protective cover downward around the pivot hinged to the fixed seat on one side. The protective cover is made of the same medical-grade plastic material as the fixed seat, with a first pressure block fixed inside. A second pressure block is slidably embedded in the bottom of the U-shaped groove. A latching mechanism is provided between the protective cover and the fixed seat. When the protective cover is rotated to the horizontal closed position, the latch automatically locks. At this time, the first pressure block on the protective cover is directly opposite the second pressure block at the bottom of the U-shaped groove. Both the first and second pressure blocks are molded from medical-grade silicone. The opposing surfaces of both have arc grooves with a radius equal to half the outer diameter of the target dialysis tubing, which are used to evenly wrap the tubing during subsequent pressing. After the protective cover is closed in place, the mechanical position preparation of this step is completed. Other methods can also be used in other embodiments, which are not limited here.

[0021] It should be noted that the above steps enable the rapid insertion of the target dialysis tubing and the reliable closure of the protective cap, ensuring accurate alignment of the first and second pressure blocks. This provides a stable mechanical foundation for subsequent precise clamping, thereby improving the convenience of operation and the accuracy of clamping.

[0022] In some embodiments, reference Figure 2 As shown in the figure, this figure is a schematic diagram of the application scenario of the auxiliary pressing data processing system shown in some embodiments of this application. The figure includes three main components: a data acquisition device, a server, and a data storage device. The data acquisition device is responsible for collecting the pressing force when the second pressing block moves towards the first pressing block, and sending the collected pressing force to the server through a communication network. The auxiliary pressing data processing system runs in the server, and the server stores the processing results in the data storage device and visualizes them.

[0023] In step 102, when the protective cover is closed to the predetermined position, the limit switch is triggered, the limit switch sends a ready signal to the controller, and when the pipeline in-situ sensor located at the bottom of the U-shaped groove detects the presence of the pipeline, the controller outputs a pipeline correctly placed signal.

[0024] In some embodiments, when the protective cover is closed to a predetermined position, a limit switch is triggered, and the limit switch sends a ready signal to the controller. This can be achieved by the following steps: When the protective cover is closed to the predetermined position, the trigger protrusion on the lower surface of the protective cover presses against the contact of the limit switch; When the internal contacts of the limit switch close, a level transition signal is generated. The level transition signal is transmitted to the input terminal of the controller via a wire as a ready signal.

[0025] In specific implementation, when the protective cover is closed to the predetermined position, the trigger protrusion on the lower surface of the protective cover presses against the contact of the limit switch in the following manner: The lower surface of the protective cover has a wedge-shaped or hemispherical trigger protrusion made of the same medical-grade plastic material as the protective cover, and its position corresponds perpendicularly to the contact of the limit switch mounted on the fixed base; as the protective cover rotates downwards around the hinge axis and gradually approaches the closed position, the trigger protrusion moves downwards synchronously with the protective cover, triggering the switch at the instant the protective cover is about to reach the horizontal closed position. The lower surface of the protrusion first contacts the top of the limit switch contact; as the protective cover continues to press down until fully closed, it triggers the protrusion to compress the limit switch contact downward until the contact is compressed to its end point of travel. At this point, the protective cover fits precisely against the upper surface of the fixed base, and the latching mechanism locks in place, completing the compression action. The limit switch uses a micro switch with a built-in return spring in its contact. When pressed, the contact moves downward and automatically resets when released, ensuring that each closure generates a reliable mechanical trigger. Other methods can also be used in other embodiments, which are not limited here.

[0026] In specific implementation, the closing of the internal contacts of the limit switch to generate a level transition signal can be achieved in the following way: the limit switch has a set of normally open contacts and a set of normally closed contacts, and the contact action is controlled by the displacement of the contact head; when the trigger protrusion presses the contact head of the limit switch downward to a preset stroke, the contact head pushes the internal spring mechanism, causing the normally open contact that was originally open to close, and the normally closed contact that was originally closed to open; at the moment the contacts close, due to the mechanical contact conduction, the resistance between the output pin of the limit switch and the internal common terminal changes from infinite to close to zero ohms, thereby generating a level transition on the output pin; Specifically, if a normally open contact configuration is used, the output pin is kept at a high level by an external pull-up resistor when not triggered. After the contact closes, the output pin is pulled down to a low level, generating a falling edge transition from high to low. If a normally closed contact configuration is used, the output pin is at a low level when not triggered. After the contact opens, the output pin is pulled up to a high level, generating a rising edge transition from low to high. The edge of this level transition signal is steep, and the duration is consistent with the mechanical action time of the contact, usually completed within a few milliseconds. It can be debouncing through subsequent circuitry. Other methods can also be used in other embodiments, which are not limited here.

[0027] In specific implementation, the level transition signal is transmitted to the input terminal of the controller via a wire. As a ready signal, it can be implemented as follows: the output pin of the limit switch is connected to the digital input port of the controller via a two-core shielded wire, where one core transmits the signal and the other core is connected to ground. Inside the controller input terminal, a pull-up resistor is connected to the controller's operating voltage to ensure that the input pin remains at a defined high level when the limit switch is not triggered. A typical value for the pull-up resistor is 4.7 kΩ to 10 kΩ, and the controller's operating voltage is, for example, 3.3 volts. V) or 5V; when the limit switch contact is closed, the output pin pulls the input pin low to ground level through the wire. After the controller detects this level change, it uses the internal software debouncing algorithm to confirm the level is stable by continuously sampling for 10 milliseconds (ms) to confirm the signal is valid. The signal is then stored in the internal register as a ready signal that the protective cover has been closed to the predetermined position. At the same time, the controller can trigger an interrupt or set the flag bit through this signal for the main program to query, providing a prerequisite for subsequent pipeline presence detection and start command. Other methods can also be used in other embodiments, which are not limited here.

[0028] In some embodiments, reference Figure 3 As shown in the figure, this is a flowchart illustrating the output of a correct pipe placement signal in some embodiments of this application. In this embodiment, when the pipe presence sensor located at the bottom of the U-shaped groove detects the presence of the pipe, the controller outputs a correct pipe placement signal, which can be achieved through the following steps: In step 1031, the in-situ sensor continuously emits a detection beam and receives reflected light to monitor whether the target dialysis tubing is present in the U-shaped groove; In step 1032, when the target dialysis tubing is present, the light intensity received by the tubing presence sensor changes, causing the level of its output pin to jump from low to high, generating a tubing presence signal; In step 1033, the controller reads the level status of the output pin of the pipeline in-position sensor. If a high level is detected and a ready signal has been received from the limit switch, the controller determines that both conditions are met simultaneously and outputs a high level from its output port as a signal that the pipeline is correctly placed.

[0029] It should be noted that the tubing presence signal in this application is a level signal generated by the tubing presence sensor, used to feed back the detection result of whether the target dialysis tubing exists in the U-shaped groove to the controller; the correct tubing placement signal is a status signal output by the controller, used to indicate that the protective cover has been closed in place and the target dialysis tubing has been correctly placed in the U-shaped groove, as an enabling condition for allowing the subsequent clamping operation to be started.

[0030] In practice, the in-situ sensor continuously emits a detection beam and receives reflected light to monitor the presence of the target dialysis tubing within the U-shaped groove. This can be achieved as follows: the in-situ sensor is a reflective infrared photoelectric sensor, with its emitting and receiving tubes installed side-by-side in the same package at the center of the bottom of the U-shaped groove; the emitting tube is driven by a controller through a current-limiting resistor, continuously emitting an infrared beam with a wavelength of 940 nanometers (nm), which shines upwards at a certain angle; when there is no target dialysis tubing in the U-shaped groove, the infrared beam illuminates the black light-absorbing area at the bottom of the U-shaped groove. On the surface, most of the light is absorbed, with only a very small portion diffusely reflected back to the receiving tube, which is in a cut-off state. When the target dialysis tubing is placed in the U-shaped groove, the outer wall of the tubing is made of medical-grade PVC material, which has a smooth surface and a certain reflectivity. When the infrared beam shines on the surface of the tubing, it is reflected, and some of the reflected light returns along the original path and is received by the receiving tube. After receiving the reflected light, the receiving tube generates a photocurrent, the magnitude of which is proportional to the intensity of the received light, thereby achieving continuous monitoring of the presence or absence of the tubing. Other methods can also be used in other embodiments, which are not limited here.

[0031] In specific implementation, when the target dialysis tubing is present, the light intensity received by the tubing presence sensor changes, causing the output pin's level to jump from low to high. The generation of the tubing presence signal can be achieved as follows: the collector of the receiving tube in the tubing presence sensor is connected to the operating voltage, and the emitter is grounded through a sampling resistor. When the receiving tube receives reflected light, a photocurrent flows through the sampling resistor, generating a voltage signal. This voltage signal is input to a comparator, such as the non-inverting input of an LM393, and the inverting input of the comparator is connected to a reference voltage threshold set by an adjustable potentiometer. When the target dialysis tubing is present... When the dialysis tubing is absent, the receiving tube is cut off, the voltage across the sampling resistor is close to 0V, lower than the reference voltage, and the comparator outputs a low level. When the target dialysis tubing is present, the receiving tube is turned on, the voltage across the sampling resistor rises, exceeds the reference voltage, and the comparator output flips to a high level. This high-level signal is the tubing presence signal, which is directly connected to the digital input pin of the controller via a wire. To eliminate ambient light interference, a scheme of pulse driving of the transmitting tube and synchronous demodulation at the receiving end can be used, or a light shield can be added to the sensor surface to ensure detection reliability. Other methods can also be used in other embodiments, which are not limited here.

[0032] In specific implementation, the controller reads the level state of the output pin of the pipeline presence sensor. If a high level is detected and a ready signal from the limit switch has been received, the controller determines that both conditions are met simultaneously and outputs a high level from its output port as a pipeline correct placement signal. This can be achieved in the following way: After the controller is powered on and initialized, it cyclically scans or monitors the status of the two input ports via interrupts. One port is connected to the ready signal of the limit switch, and the other port is connected to the output signal of the pipeline presence sensor. The controller internally sets two flag bits: a ready signal validity flag and a pipeline presence flag. When the limit switch input port is detected to be low (if a normally open contact pull-down configuration is used) or high (if a normally closed contact pull-up configuration is used) and software debouncing is confirmed, the ready signal validity flag is set. When the pipeline presence sensor input is detected to be low (if a normally open contact pull-up configuration is used), the ready signal validity flag is set. When the port is high, a flag indicating the presence of the pipeline is set. In each detection cycle, the controller checks if both flags are true simultaneously. If both are true, it indicates the protective cover is closed tightly and the pipeline is in place, meeting the startup conditions. At this time, the controller outputs a high-level signal through the general-purpose output port. This high-level signal drives a driver circuit, such as a transistor or MOSFET, to illuminate a green LED indicator as a standby indicator. Simultaneously, this high-level signal also enables the power supply to the start button, illuminating its backlight and prompting the operator to press the start button to proceed with the next inflation and compression operation. If any condition is not met, the controller keeps the output port low, the LED indicator is off or displays red, and the start button is in an invalid state, ensuring the system enters the compression process only under safe conditions. Other methods can be used in other embodiments, which are not limited here.

[0033] It should be noted that the above steps can achieve dual safety confirmation of the protective cover being closed in place and the pipeline being correctly placed, avoiding accidental activation of the clamping mechanism when the pipeline is not placed correctly or the protective cover is not closed tightly.

[0034] In step 103, in response to the start command issued by the operator, the controller starts the micro air pump connected to the air circuit of the fixed seat and controls the micro air pump to inflate the sealed airbag located between the second pressure block and the bottom of the U-shaped groove, so that the sealed airbag expands to push the second pressure block to move towards the first pressure block, thereby uniformly compressing the target dialysis tubing with a preset pressure.

[0035] In some embodiments, the controller can activate the miniature air pump connected to the air circuit of the fixed base in response to a start command issued by the operator by means of the following steps: When the operator presses the enabled start button, the contacts of the start button close, generating a level transition signal as a start command; The start command is transmitted to the input terminal of the controller via a wire; After detecting the start command, the controller outputs a high-level control signal from its output port to the drive circuit of the micro air pump connected to the air circuit of the fixed base, so that the micro air pump is powered on and started.

[0036] In specific implementation, when the operator presses the enabled start button, the contacts of the start button close, generating a level transition signal as a start command. This can be achieved in the following way: the start button is a touch-sensitive self-resetting button, installed on the operation panel on the side of the mounting base, with its two pins connected to the enable power supply terminal and ground wire of the controller, respectively; when the controller correctly places the signal through the output circuit in step 2 to drive a PNP transistor to conduct, the enable power supply terminal is connected to one end of the start button, at which point the button is in the enabled state, and its backlight LED... The D indicator light illuminates to signal that the button can be pressed. When the operator presses the start button's keycap with their finger, the internal spring deforms, causing the two normally open contacts to close momentarily. This shorts the signal line at the other end of the button to ground, generating a falling edge transition from high to low on the signal line. This falling edge transition is the start command, with a steep edge and a duration of approximately 20 to 50 milliseconds. After releasing the button, the contacts open, and the signal line returns to a high level through the pull-up resistor, ready for the next trigger. Other methods can also be used in other embodiments, which are not limited here.

[0037] In specific implementation, the start command can be transmitted to the controller's input terminal via a wire in the following manner: the signal line of the start button is connected to the controller's digital input port via a two-core shielded cable, where one core wire transmits the start command signal and the other core wire is connected to the common ground; the controller's input terminal is internally equipped with a pull-up resistor connected to a 3.3V operating voltage, for example, 10kΩ, to ensure that the input pin remains at a high level when the button is not pressed; when the button is pressed and the contact is closed, the signal line pulls the input pin down to ground level through the cable, thereby transmitting the start command to the controller. The cable sheath is grounded to suppress electromagnetic interference and ensure the reliability of signal transmission. Other methods can also be used in other embodiments, which are not limited here.

[0038] In specific implementation, after the controller detects the start command, it outputs a high-level control signal from its output port to the drive circuit of the miniature air pump connected to the air path of the fixed base, so that the miniature air pump is powered on and started. This can be achieved in the following way: after the controller is powered on and initialized, it continuously monitors the level status of the input port connected to the start button through interrupt or polling; when it detects that the port changes from high level to low level and after software debouncing, for example, after continuously sampling for 10 milliseconds to confirm that the level is stable, the controller determines that a valid start command has been received; then the controller outputs a high level from a pre-configured general-purpose output port. The signal is connected to the input terminal of the micro air pump drive circuit. The drive circuit uses an N-channel MOSFET, such as the AO3400, as the switching element. Its gate is connected to the output port of the controller through a current-limiting resistor, its source is grounded, and its drain is connected to the negative terminal of the micro air pump. The positive terminal of the micro air pump is directly connected to the power supply, such as 12 volts. When the controller outputs a high level, the MOSFET is turned on, the power supply circuit of the micro air pump is connected, the micro air pump is powered on and starts to rotate to generate compressed air. At the same time, the controller can light up a yellow LED to indicate the working status of the air pump. Other methods can also be used in other embodiments, which are not limited here.

[0039] In some embodiments, controlling the micro air pump to inflate the sealed airbag disposed between the second pressure block and the bottom of the U-shaped groove, causing the sealed airbag to expand, thereby pushing the second pressure block toward the first pressure block, and thus uniformly compressing the target dialysis tubing with a preset pressure, can be achieved by the following steps: After the miniature air pump is started, compressed air is continuously pumped into the sealed airbag through the air passage; The sealed airbag expands after being inflated, thereby pushing upwards against the second pressure block that is in contact with it. The second pressure block moves along the guide structure towards the first pressure block under the thrust of the sealed airbag, thereby reducing the gap between the second and the first pressure block. When the gap is smaller than the outer diameter of the target dialysis tubing, the target dialysis tubing is squeezed. The clamping force increases as the air pressure inside the sealed airbag increases until a preset pressure value is reached, so that the target dialysis tubing is uniformly clamped.

[0040] It should be noted that the preset pressure value in this application is the target clamping force value set inside the controller, which corresponds to the safe clamping force required clinically, and is used to control the inflation process so that the clamping force accurately reaches this value.

[0041] In a specific implementation, after the micro air pump is started, the continuous inflation of compressed air into the sealed airbag through the air passage can be achieved in the following way: the air outlet of the micro air pump is connected to a three-way connector through a medical-grade silicone hose with an inner diameter of 3 mm and an outer diameter of 5 mm. One outlet of the three-way connector is connected to the air inlet of the sealed airbag, and the other outlet is connected to the inlet of a normally closed two-position two-way solenoid valve. The outlet of the solenoid valve is open to the atmosphere. During normal inflation, the solenoid valve is in a de-energized and closed state, and the compressed air output by the air pump can only enter the sealed airbag. The air inlet of the airbag is equipped with a one-way valve (composed of a silicone diaphragm and a spring) to allow gas to enter but prevent backflow. The air pump runs continuously, drawing in external air through the air inlet filter and compressing and expelling it, continuously inflating the airbag through the hose, so that the air pressure inside the airbag gradually increases. Other methods can also be used in other embodiments, which are not limited here.

[0042] In a specific implementation, the sealed airbag expands after inflation, thereby pushing the second pressure block in contact with it upwards. This can be achieved in the following way: the sealed airbag is made of a 0.2 mm thick medical thermoplastic polyurethane film, which is formed into a flat cuboid shape by high-frequency heat sealing. Its bottom surface is fixed to the recess at the bottom of the U-shaped groove with medical-grade adhesive, and its top surface is in contact with the bottom surface of the second pressure block. When compressed air enters the airbag, the internal pressure of the airbag increases, the film material undergoes elastic deformation, and the thickness of the airbag gradually increases. Since the bottom surface of the airbag is fixed, the top surface expands freely, so the top surface of the airbag bulges upwards, applying an upward thrust to the bottom surface of the second pressure block. The bottom of the second pressure block is provided with an annular flange, which cooperates with the guide hole at the bottom of the U-shaped groove to ensure that the second pressure block can only move vertically. As the airbag continues to expand, the thrust continues to increase, pushing the second pressure block to rise smoothly along the guide hole. Other methods can also be used in other embodiments, which are not limited here.

[0043] In specific implementation, the second pressure block moves towards the first pressure block along the guide structure under the thrust of the sealed airbag, thereby reducing the gap between them. When the gap is smaller than the outer diameter of the target dialysis tubing, the target dialysis tubing begins to be compressed. The compression force increases with the increase of air pressure inside the sealed airbag until a preset pressure value is reached, ensuring that the target dialysis tubing is uniformly compressed. This can be achieved by the following method: the guide structure of the second pressure block consists of two guide posts at its bottom and two guide holes corresponding to the bottom of the U-shaped groove. The guide posts have smooth surfaces, and the guide holes are embedded with self-lubricating copper sleeves to ensure smooth and unbiased movement of the second pressure block. In the initial state, the protective cover is closed, and there is a gap between the first and second pressure blocks. The target dialysis tubing is located between them but is not compressed. When the airbag inflates and pushes the second pressure block upward, the second pressure block gradually approaches the first pressure block, and the gap between them gradually narrows. When the gap is small... When the outer diameter of the target dialysis tubing is, for example, 6 mm, and the gap is reduced to 5 mm, the upper surface of the second pressure block begins to contact the outer wall of the tubing and applies compression force. As the air pressure in the cuff continues to rise, the second pressure block continues to rise, the amount of compression deformation increases, and the clamping force increases accordingly. The controller monitors the current pressure in real time by reading the feedback value of the pressure sensor set on the cuff. The controller has a preset target pressure value, for example, 0.25 MPa, which corresponds to the clamping force required clinically. The controller uses a proportional-integral-derivative (PID) algorithm to adjust the speed of the micro air pump or controls the inflation rate through pulse width modulation (PWM) to ensure that the pressure rises smoothly to the target value and avoids shock. When the pressure reaches the preset value, the controller prepares to execute the next step, that is, to stop inflation, thereby ensuring that the target dialysis tubing is uniformly compressed to the predetermined degree. Other methods can also be used in other embodiments, which are not limited here.

[0044] It should be noted that the above steps can realize the automatic clamping process driven by pneumatics. By applying pressure evenly through the airbag, the second pressure block moves smoothly towards the first pressure block, and the pipeline is precisely clamped with a preset pressure value, thereby improving the consistency of the clamping force.

[0045] In step 104, the pressure sensor installed on the sealed airbag monitors the clamping force in real time and detects the on / off status of the target dialysis tubing. When the monitored clamping force value reaches the preset safety threshold range and the target dialysis tubing is detected to be effectively blocked, the controller controls the micro air pump to stop inflating and maintains the air pressure inside the airbag through the pressure holding valve. At the same time, the status indicator light is lit to indicate that the target dialysis tubing has been properly clamped.

[0046] In some embodiments, the pressure sensor disposed on the sealed airbag monitors the clamping force in real time, and simultaneously detects the on / off status of the target dialysis tubing. This can be achieved by the following steps: The pressure sensor installed on the sealed airbag collects the air pressure value inside the sealed airbag in real time, and converts the air pressure value into an analog voltage signal and transmits it to the analog input port of the controller. The pipeline continuity detection device monitors the continuity status of the target dialysis pipeline in real time and transmits a digital level signal indicating whether the pipeline is unobstructed or blocked to the digital input port of the controller. The controller periodically reads the analog voltage signal from the pressure sensor through its analog input port and converts it into the corresponding clamping force value. At the same time, it reads the digital level signal from the target dialysis tubing on / off detection device through its digital input port, thereby synchronously obtaining the current clamping force value and the on / off status of the target dialysis tubing.

[0047] In specific implementation, the pressure sensor installed on the sealed airbag collects the air pressure value inside the sealed airbag in real time and converts the air pressure value into an analog voltage signal, which is then transmitted to the analog input port of the controller. This can be achieved in the following way: The pressure sensor is a surface-mount MEMS pressure sensor chip, such as the MPXV5050VC6T5, which has an air nozzle on its back and is connected to the inside of the sealed airbag through a silicone tube with an inner diameter of 1 mm. The sensor integrates a pressure-sensitive resistor and a signal conditioning circuit. When the air pressure inside the airbag changes, the pressure-sensitive resistor value changes, and the conditioning circuit converts it into an analog voltage output of 0.5 volts to 4.5 volts. This voltage is linearly related to the air pressure, where 0 kPa corresponds to 0.5 volts and 50 kPa corresponds to 4.5 volts. The output pin of the sensor is connected to the analog input port of the controller through a dual-core shielded cable. The core wire of the cable transmits the analog voltage signal, and the shielding layer is grounded to avoid electromagnetic interference. The input impedance of the analog input port inside the controller is greater than 1 megohm to ensure that the signal attenuation is negligible. Other methods can also be used in other embodiments, which are not limited here.

[0048] In practical implementation, the pipeline continuity detection device monitors the continuity status of the target dialysis tubing in real time and transmits a digital level signal indicating whether the tubing is open or blocked to the digital input port of the controller. This can be achieved in the following way: the pipeline continuity detection device uses a transmission-type infrared photoelectric sensor, such as the ITR9608. Its emitting and receiving tubes are installed opposite each other in the mounting holes on both sides of the U-shaped groove, so that the infrared beam passes perpendicularly through the central axis of the target dialysis tubing. The emitting tube is driven by the controller through a current-limiting resistor, for example, 100 ohms, and continuously emits 950 nm infrared light. The receiving tube is a phototransistor, with its collector connected to the operating voltage (5 volts) and its emitter grounded through a 10 kΩ resistor, and simultaneously connected to a comparator, such as L... The non-inverting input of the M393 and the inverting input of the comparator are connected to a reference voltage set by a potentiometer, such as 2.5 volts. When the conduit is open, infrared light shines through the conduit onto the receiver, which conducts, and the emitter voltage rises to about 4 volts, exceeding the reference voltage. The comparator outputs a high level, about 5 volts. When the conduit is compressed and blocked, the conduit wall folds, causing a sharp decrease in light transmittance. The receiver is cut off, and the emitter voltage approaches 0 volts, falling below the reference voltage. The comparator outputs a low level (0 volts). The comparator's output pin is connected to the controller's digital input port via a two-core shielded cable, thereby transmitting the digital level signal indicating the conduit's open / closed state to the controller in real time. Other methods can be used in other embodiments, which are not limited here.

[0049] In specific implementation, the controller periodically reads the analog voltage signal from the pressure sensor through its analog input port, converts it into the corresponding clamping force value, and simultaneously reads the digital level signal from the target tubing on / off detection device through its digital input port. This allows for the synchronous acquisition of the current clamping force value and the on / off status of the target dialysis tubing. This can be achieved as follows: After power-on, the controller initializes its internal analog-to-digital converter (ADC) module, configuring it to continuously sample the analog input port at a sampling rate of 100 Hz; each sample yields a 12-bit digital value (0 to 4095). The controller then uses the voltage-pressure signal from the sensor... The relationship is calculated by linear interpolation to obtain the current air pressure value, which is then converted into a clamping force value based on the effective area of ​​the airbag, or the air pressure value is directly used as the clamping force. For example, the effective area of ​​the airbag is 3 square centimeters, and the unit of the clamping force value is Newtons. At the same time, the controller reads the level status of the digital input port at the same cycle and uses software debouncing, for example, to confirm the current on / off state by ensuring that three consecutive sampling values ​​are consistent. The controller stores the clamping force value and on / off state obtained each time in an internal register for subsequent comparison and judgment, thereby obtaining the two parameters in real time. Other methods can also be used in other embodiments, which are not limited here.

[0050] In some embodiments, when the monitored clamping force reaches a preset safety threshold range and the target dialysis tubing is detected to be effectively blocked, the controller controls the micro air pump to stop inflating and maintains the air pressure inside the airbag through the pressure-holding valve, while simultaneously illuminating the status indicator light to indicate that the target dialysis tubing has been correctly clamped. This can be achieved through the following steps: The controller compares the real-time clamping force value with a preset safety threshold range and determines whether the voltage level of the pipeline continuity detection device is an effective level indicating that the target dialysis pipeline has been blocked. When the clamping force is within the safety threshold range and the on / off state is an effective level of being blocked, the controller outputs a stop signal from its first output port to the drive circuit of the micro air pump, causing the micro air pump to be de-energized and stop working. The controller simultaneously outputs a pressure holding control signal from its second output port to the pressure holding valve connected to the air circuit, causing the pressure holding valve to activate and lock the air pressure inside the sealed airbag. The controller simultaneously outputs a lighting signal from its third output port to the status indicator light, causing the status indicator light to illuminate and indicating that the target dialysis tubing has been properly clamped.

[0051] In specific implementation, the controller compares the real-time acquired clamping force value with a preset safety threshold range and determines whether the level state of the pipeline on / off detection device is an effective level indicating that the target dialysis pipeline has been blocked. This can be achieved in the following way: a set of safety threshold parameters are pre-stored in the controller's internal non-volatile memory, including a lower pressure limit (e.g., 0.2 MPa), an upper pressure limit (e.g., 0.3 MPa), and an effective blocking level definition (e.g., a low level indicates blocking). After acquiring a new clamping force value and on / off status each time, the controller first determines whether the current clamping force value is greater than or equal to the lower pressure limit and less than or equal to the upper pressure limit. If so, it further determines whether the current on / off level is low. If both conditions are met, the controller internally sets a clamping success flag and prepares to execute subsequent actions. If neither condition is met, the flag is cleared or the system remains in a waiting state. Other methods can also be used in other embodiments, which are not limited here.

[0052] In specific implementation, when the clamping force is within the safety threshold range and the on / off state is an effective level of blocked state, the controller outputs a stop signal from its first output port to the drive circuit of the micro air pump, causing the micro air pump to stop working due to power failure. This can be achieved in the following way: the first output port of the controller is a general purpose input / output pin (GPIO), initially at a high level to drive the air pump; when the clamping success flag is set, the controller sets the GPIO pin to a low level. This pin is connected to the gate of the N-channel MOSFET in the micro air pump drive circuit, such as AO3400; when this pin is low, the MOSFET is cut off, disconnecting the power supply circuit of the micro air pump, and the micro air pump immediately stops operating; at the same time, the controller can read the air pump current detection circuit, such as through a series sampling resistor, to confirm that the air pump has been powered off. Other methods can also be used in other embodiments, which are not limited here.

[0053] In specific implementation, the controller simultaneously outputs a pressure-holding control signal from its second output port to the pressure-holding valve connected to the air circuit, causing the pressure-holding valve to actuate and lock the air pressure inside the sealed airbag. This can be achieved in the following way: the pressure-holding valve is a normally closed two-position two-way solenoid valve, such as model SMC S070B. One end of its coil is connected to a power supply (12 volts), and the other end is connected to the drain of an N-channel MOSFET. The source of the MOSFET is grounded, and the gate is connected to the second output port of the controller through a 1 kΩ resistor. During inflation, the second output port of the controller is at a low level, the MOSFET is cut off, no current flows through the pressure-holding valve coil, and the valve is in a closed state. When the compression success condition is met, the controller keeps the second output port at a low level, so that the pressure-holding valve continues to be closed, thereby locking the air pressure inside the airbag. If pressure relief is required, the controller can set the second output port to a high level to open the valve and release the air pressure. Other methods can also be used in other embodiments, which are not limited here.

[0054] In specific implementation, the controller simultaneously outputs a lighting signal from its third output port to the status indicator light, illuminating the status indicator light to indicate that the target dialysis tubing has been correctly clamped. This can be achieved as follows: the status indicator light uses a tri-color LED, such as model SML-LXFT0603RGB, mounted on the fixed base operation panel; the controller's third output port is a GPIO pin connected to the base of a PNP transistor, such as SS8550. The emitter of the transistor is connected to a 5V power supply, and the collector is connected to the LED's common terminal through a current-limiting resistor, such as 330 ohms. The anode and three cathodes of the LED are connected to the three color control pins of the controller through independent resistors. When the pressing success condition is met, the controller sets the third output port to a high level, turning on the PNP transistor and applying a 5-volt voltage to the common anode of the LED. At the same time, the controller sets the corresponding color control pin, such as green, to a low level, illuminating the green LED and providing clear visual feedback to the operator, indicating that pressing is complete. If an abnormality occurs during inflation, the controller can illuminate the red LED and make it flash. Other methods can also be used in other embodiments, which are not limited here.

[0055] It should be noted that the above steps can achieve dual real-time monitoring of clamping force and pipeline on / off status. After reaching the safe pressure and confirming that the pipeline is effectively blocked, the inflation will automatically stop and the pressure will be maintained and locked. At the same time, clear status indications will be provided, thereby improving the reliability of the clamping effect and the intelligence level of the hemodialysis tubing fixation device.

[0056] In another aspect, in some embodiments, this application provides a hemodialysis tubing fixing device for easy connection, the device including an auxiliary clamping unit, see reference. Figure 4 The figure is a schematic diagram of the structure of an auxiliary clamping unit according to some embodiments of this application. The auxiliary clamping unit includes a preprocessing module 401, a processing module 402, and an execution module 403, which are described below: Pretreatment module 401, in this application, is mainly used to pre-place the target dialysis tubing into the U-shaped groove of the fixing seat, close the protective cover on the fixing seat, and make the first pressure block on the protective cover face the second pressure block at the bottom of the U-shaped groove; Processing module 402, in this application, is mainly used to trigger a limit switch when the protective cover is closed to a predetermined position. The limit switch sends a ready signal to the controller. When the pipeline in-situ sensor at the bottom of the U-shaped groove detects the presence of the pipeline, the controller outputs a pipeline correctly placed signal. The processing module 402 described in this application is also used to respond to the start command issued by the operator. The controller starts the micro air pump connected to the fixed seat air circuit and controls the micro air pump to inflate the sealed air bag set between the second pressure block and the bottom of the U-shaped groove, so that the sealed air bag expands to push the second pressure block to move towards the first pressure block, thereby uniformly pressing the target dialysis tubing with a preset pressure. The execution module 403 in this application is mainly used to monitor the clamping force in real time through the pressure sensor installed on the sealed airbag, and at the same time detect the on / off status of the target dialysis tubing. When the monitored clamping force value reaches the preset safety threshold range and the target dialysis tubing is detected to be effectively blocked, the controller controls the micro air pump to stop inflating and maintains the air pressure in the airbag through the pressure holding valve, and at the same time illuminates the status indicator light to indicate that the target dialysis tubing has been correctly clamped.

[0057] Each module in the aforementioned auxiliary clamping unit can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0058] In another embodiment, this application provides a computer device, which may be a server, and its internal structure diagram may be as follows. Figure 5 As shown, the computer device includes a processor, memory, and a network interface connected via a system bus. The processor provides computing and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The database stores auxiliary clamping data for hemodialysis tubing. The network interface communicates with external terminals via a network connection. When executed by the processor, the computer program implements an auxiliary clamping method for hemodialysis tubing.

[0059] Those skilled in the art will understand that Figure 5 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0060] In one embodiment, a computer device is also provided, including a memory and a processor, the memory storing a computer program, the processor executing the computer program to implement the steps in the above-described embodiment of the auxiliary clamping method for hemodialysis tubing.

[0061] In one embodiment, a computer-readable storage medium is provided storing a computer program that, when executed by a processor, implements the steps in the above-described embodiment of the auxiliary clamping method for hemodialysis tubing.

[0062] In one embodiment, a computer program product or computer program is provided, comprising computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the steps in the above-described embodiment of the auxiliary clamping method for hemodialysis tubing.

[0063] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the methods described above. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, or optical storage, etc. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.

[0064] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An auxiliary clamping method for hemodialysis tubing, applied to a hemodialysis tubing fixing device for easy connection, characterized in that, The method includes the following steps: The target dialysis tubing is pre-placed into the U-shaped groove of the fixing seat, and the protective cover on the fixing seat is closed so that the first pressure block on the protective cover is opposite to the second pressure block at the bottom of the U-shaped groove; When the protective cover is closed to the predetermined position, the limit switch is triggered. The limit switch sends a ready signal to the controller. When the pipeline presence sensor located at the bottom of the U-shaped groove detects the presence of the pipeline, the controller outputs a pipeline correct placement signal. In response to the start command issued by the operator, the controller starts the micro air pump connected to the air circuit of the fixed seat and controls the micro air pump to inflate the sealed air bag located between the second pressure block and the bottom of the U-shaped groove, so that the sealed air bag expands to push the second pressure block to move towards the first pressure block, thereby uniformly compressing the target dialysis tubing with a preset pressure. The controller monitors the clamping force in real time by means of a pressure sensor installed on the sealed airbag, and detects the on / off status of the target dialysis tubing. When the monitored clamping force value reaches the preset safety threshold range and the target dialysis tubing is detected to be effectively blocked, the controller controls the micro air pump to stop inflating and maintains the air pressure in the airbag through the pressure holding valve. At the same time, the status indicator light is lit to indicate that the target dialysis tubing has been properly clamped.

2. The method as described in claim 1, characterized in that, When the protective cover is closed to the predetermined position, a limit switch is triggered. The limit switch sends a ready signal to the controller, specifically including: When the protective cover is closed to the predetermined position, the trigger protrusion on the lower surface of the protective cover presses against the contact of the limit switch; When the internal contacts of the limit switch close, a level transition signal is generated. The level transition signal is transmitted to the input terminal of the controller via a wire as a ready signal.

3. The method as described in claim 1, characterized in that, When the pipeline presence sensor located at the bottom of the U-shaped groove detects the presence of the pipeline, the controller outputs a pipeline correct placement signal, specifically including: The in-situ sensor continuously emits a detection beam and receives reflected light to monitor whether the target dialysis tubing is present in the U-shaped groove; When the target dialysis tubing is present, the light intensity received by the tubing presence sensor changes, causing the level of its output pin to jump from low to high, generating a tubing presence signal; The controller reads the level status of the output pin of the pipeline in-place sensor. If a high level is detected and a ready signal has been received from the limit switch, the controller determines that both conditions are met simultaneously and outputs a high level from its output port as a signal that the pipeline is correctly placed.

4. The method as described in claim 1, characterized in that, In response to a start command issued by the operator, the controller activates the miniature air pump connected to the air circuit of the fixed base, specifically including: When the operator presses the enabled start button, the contacts of the start button close, generating a level transition signal as a start command; The start command is transmitted to the input terminal of the controller via a wire; After detecting the start command, the controller outputs a high-level control signal from its output port to the drive circuit of the micro air pump connected to the air circuit of the fixed base, so that the micro air pump is powered on and started.

5. The method as described in claim 1, characterized in that, Controlling the micro air pump to inflate the sealed airbag located between the second pressure block and the bottom of the U-shaped groove, causing the sealed airbag to expand, thereby pushing the second pressure block towards the first pressure block, and thus uniformly compressing the target dialysis tubing at a preset pressure, specifically includes: After the miniature air pump is started, compressed air is continuously pumped into the sealed airbag through the air passage; The sealed airbag expands after being inflated, thereby pushing upwards against the second pressure block that is in contact with it. The second pressure block moves along the guide structure towards the first pressure block under the thrust of the sealed airbag, thereby reducing the gap between the second and the first pressure block. When the gap is smaller than the outer diameter of the target dialysis tubing, the target dialysis tubing is squeezed. The clamping force increases as the air pressure inside the sealed airbag increases until a preset pressure value is reached, so that the target dialysis tubing is uniformly clamped.

6. The method as described in claim 1, characterized in that, The clamping force is monitored in real time by a pressure sensor installed on the sealed airbag, and the on / off status of the target dialysis tubing is detected simultaneously, specifically including: The pressure sensor installed on the sealed airbag collects the air pressure value inside the sealed airbag in real time, and converts the air pressure value into an analog voltage signal and transmits it to the analog input port of the controller. The pipeline continuity detection device monitors the continuity status of the target dialysis pipeline in real time and transmits a digital level signal indicating whether the pipeline is unobstructed or blocked to the digital input port of the controller. The controller periodically reads the analog voltage signal from the pressure sensor through its analog input port and converts it into the corresponding clamping force value. At the same time, it reads the digital level signal from the target dialysis tubing on / off detection device through its digital input port, thereby synchronously obtaining the current clamping force value and the on / off status of the target dialysis tubing.

7. The method as described in claim 1, characterized in that, When the monitored clamping force reaches the preset safety threshold range and the target dialysis tubing is detected to be effectively blocked, the controller controls the micro air pump to stop inflating and maintains the air pressure inside the airbag through the pressure-holding valve. Simultaneously, the status indicator light illuminates to indicate that the target dialysis tubing has been correctly clamped. Specifically, this includes: The controller compares the real-time clamping force value with a preset safety threshold range and determines whether the voltage level of the pipeline continuity detection device is an effective level indicating that the target dialysis pipeline has been blocked. When the clamping force is within the safety threshold range and the on / off state is an effective level of being blocked, the controller outputs a stop signal from its first output port to the drive circuit of the micro air pump, causing the micro air pump to be powered off and stop working. The controller simultaneously outputs a pressure holding control signal from its second output port to the pressure holding valve connected to the air circuit, causing the pressure holding valve to activate and lock the air pressure inside the sealed airbag. The controller simultaneously outputs a lighting signal from its third output port to the status indicator light, causing the status indicator light to illuminate and indicating that the target dialysis tubing has been properly clamped.

8. A hemodialysis tubing fixing device for easy connection, the device including an auxiliary clamping unit, characterized in that, The auxiliary clamping unit includes: The pretreatment module is used to pre-place the target dialysis tubing into the U-shaped groove of the fixing seat, close the protective cover on the fixing seat, and make the first pressure block on the protective cover face the second pressure block at the bottom of the U-shaped groove; The processing module is used to trigger a limit switch when the protective cover is closed to a predetermined position. The limit switch sends a ready signal to the controller. When the pipeline presence sensor located at the bottom of the U-shaped groove detects the presence of the pipeline, the controller outputs a pipeline correct placement signal. The processing module is also used to respond to the start command issued by the operator. The controller starts the micro air pump connected to the air circuit of the fixed seat and controls the micro air pump to inflate the sealed air bag set between the second pressure block and the bottom of the U-shaped groove, so that the sealed air bag expands to push the second pressure block to move towards the first pressure block, thereby uniformly pressing the target dialysis tubing with a preset pressure. The execution module is used to monitor the clamping force in real time through a pressure sensor installed on the sealed airbag, and at the same time detect the on / off status of the target dialysis tubing. When the monitored clamping force value reaches the preset safety threshold range and the target dialysis tubing is detected to be effectively blocked, the controller controls the micro air pump to stop inflating and maintains the air pressure in the airbag through the pressure holding valve, while illuminating the status indicator light to indicate that the target dialysis tubing has been properly clamped.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the auxiliary clamping method for the hemodialysis tubing as described in any one of claims 1 to 7.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the auxiliary clamping method for the hemodialysis tubing as described in any one of claims 1 to 7.

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