Intelligent infusion nursing device capable of being remotely regulated and controlled for internal and surgical patients

Abstract

The invention relates to the technical field of medical care, in particular to a remotely controllable intelligent infusion nursing device for internal and surgical patients, which comprises a control body, the control body comprises a flow rate control module and a bottom column, and two ends of the bottom column are respectively connected with a guide tube and a liquid storage column. And a wireless controller and a liquid flow controller connected with the wireless controller are arranged in the flow rate regulation and control module. A self-adaptive fuzzy control logic, a logic redundancy controller and an environment compensation unit are integrated in the wireless controller. The periphery of the guide pipe is sleeved with a heat preservation sleeve, and a transition ring is connected between the liquid storage column and the bottom column. According to the invention, remote signals can be demodulated through the wireless controller and the liquid flow controller is controlled to execute flow regulation and control; high-precision speed stabilization is achieved through environment compensation and fuzzy logic, infusion safety and comfort are improved by combining logic redundancy and a heat preservation structure, and the problems of remote control and environment interference are effectively solved.

Description

Technical Field

[0001] This invention relates to the field of medical and nursing technology, and in particular to a remotely controllable intelligent infusion nursing device for internal and surgical patients. Background Technology

[0002] In modern clinical medical care, intravenous infusion is one of the core methods for drug treatment and nutritional support for internal medicine and surgical patients. The accuracy of the infusion rate and the stability of the process directly affect the patient's treatment outcome and life safety. Traditional infusion methods mainly rely on gravity dripping, with medical staff manually adjusting the flow rate through manual clamps on the infusion line. This method not only has limited adjustment precision but also makes it difficult to make dynamic and precise adjustments based on the patient's real-time physiological state or changes in medical orders.

[0003] While some automated infusion support devices have emerged on the market, most still suffer from functional limitations, particularly in remote monitoring and intelligent control. Existing infusion devices generally lack effective remote interaction mechanisms, preventing healthcare professionals from providing real-time intervention and precise control of patient infusion flow at the nurses' station or other remote locations. Furthermore, existing control systems often lack adaptive adjustment capabilities and logical redundancy when dealing with complex and changing environmental factors, and infusion tubing lacks necessary insulation in low-temperature environments, easily causing discomfort or even vasospasm in patients due to excessively low solution temperature. Summary of the Invention

[0004] The purpose of this invention is to provide a remotely controllable intelligent infusion nursing device for internal and surgical patients, in order to solve the technical problems of the lack of remote control means and the fluctuation of flow rate caused by environmental factors in the existing infusion nursing process.

[0005] This invention provides a remotely controllable intelligent infusion nursing device for internal and surgical patients, comprising a control body, which consists of a flow rate control module and a base column fixedly connected to the bottom of the flow rate control module; the base column has a hollow structure inside, a guide tube is connected to the lower end of the base column, and a liquid storage column is connected to the upper end through a threaded structure or a snap-fit ​​structure; the flow rate control module is equipped with a wireless controller and a liquid flow controller electrically connected to the wireless controller.

[0006] In some embodiments, the wireless controller integrates an adaptive fuzzy control logic unit, a logic redundancy controller, and an environmental compensation unit.

[0007] In some embodiments, the adaptive fuzzy control logic unit calculates and outputs the corresponding stepper motor control pulse based on the deviation between the set target flow rate and the actual flow rate fed back by the sensor, as well as the rate of change of the deviation, through a pre-stored fuzzy rule table.

[0008] In some embodiments, the fluid flow controller includes a micro stepper motor, a reduction gear set, and an eccentric clamping wheel; the micro stepper motor rotates in steps according to the pulse signal output by the wireless controller, and the reduction gear set drives the eccentric clamping wheel to move, thereby changing the degree of clamping on the infusion tubing passing through the control body.

[0009] In some embodiments, a transition ring is provided between the reservoir column and the bottom column. The inner diameter of the transition ring tapers from top to bottom in a conical shape, and a medical-grade silicone sealing ring is provided at the connection between the transition ring and the bottom column and the reservoir column.

[0010] In some embodiments, the outer periphery of the guide tube is fitted with an insulating sleeve, which includes, from the inside out, a reflective aluminum foil layer, a polyurethane insulating layer, and a medical-grade polyvinyl chloride protective layer.

[0011] In some embodiments, the logic redundancy controller includes a master processing chip and a slave monitoring chip. The slave monitoring chip monitors the working status of the master processing chip in real time and takes over control when the master processing chip experiences a logic crash or outputs an abnormal signal.

[0012] In some embodiments, a manual reset knob is provided on the side wall of the base column, and the manual reset knob is connected to the eccentric clamping wheel of the liquid flow controller through a mechanical linkage mechanism.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This invention achieves remote, non-contact, precise adjustment of infusion flow rate through the synergistic effect of a wireless controller and a fluid flow controller, replacing the traditional manual adjustment method, reducing the frequency of medical staff entering the ward, and improving the level of automation in nursing work;

[0015] 2. This invention combines an adaptive fuzzy control logic unit with an environmental compensation unit to address the impact of pressure changes caused by the decrease in drug concentration and viscosity changes caused by fluctuations in ambient temperature on the flow rate during infusion. This keeps the flow rate control accuracy within the minimum error range required in clinical practice, ensuring a constant rate at which the drug enters the patient's body.

[0016] 3. This invention provides double electronic protection for the infusion process by setting up a logic redundancy controller, effectively avoiding the risk of infusion loss of control due to single-point electronic failure;

[0017] 4. This invention reduces heat loss of the drug solution along the delivery path by setting a multi-layered heat-insulating sleeve on the outer periphery of the guide tube, using the principle of physical heat insulation, so that the drug solution is kept at a state close to the human body temperature, thus eliminating vasospasm caused by low-temperature drug solution infusion.

[0018] 5. Through the modular structural design of the bottom column, transition ring and reservoir column, the present invention enables the device to have good mechanical stability and sealing performance. Moreover, the device can be directly connected in series with existing standard medical infusion consumables without the need for large-scale modification of the existing nursing process, and has extremely high clinical practical value and promotion prospects. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Fig. 1 This is a schematic diagram of the structure of the remotely controllable intelligent infusion care device for internal and surgical patients according to the present invention.

[0021] Fig. 2 This is an exploded view of the intelligent infusion care device for internal and surgical patients that can be remotely controlled according to the present invention.

[0022] In the picture:

[0023] 1-Control body; 2-Liquid flow controller; 3-Wireless controller; 4-Liquid reservoir; 5-Transition ring; 6-Bottom column; 7-Guide tube; 8-Insulation sleeve. Detailed Implementation

[0024] The following will be based on embodiments of the present invention. Figs. 1-2 The technical solutions in the embodiments of the present invention will be clearly and completely described together. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0025] It should be noted that the application scenarios of this invention cover a variety of fields, including precise perfusion of chemotherapy drugs in internal medicine, constant-rate infusion of cardiovascular drugs, and postoperative nutritional fluid supplementation in surgery.

[0026] Example

[0027] The outer shell of the control body 1 is made of medical-grade ABS engineering plastic through injection molding, possessing good mechanical strength, corrosion resistance, and biocompatibility. Inside the control body 1, the space is divided into an upper flow rate control chamber and a lower support connection section. The flow rate control module is integrated into the core area of ​​the control body 1, and it is fixed to the wireless controller 3 and the liquid flow controller 2 via an internal bracket. The bottom column 6 is fixedly connected to the bottom of the flow rate control module via a high-strength threaded structure. The bottom column 6 not only serves as a longitudinal support component of the device, but also has a through-hole hollow wiring channel for guiding sensor signal lines and power lines. The lower end of the bottom column 6 is connected to a guide tube 7 via a sealed interface, while its upper end is connected to the liquid storage column 4 via a transition ring 5.

[0028] The reservoir column 4 is located at the top of the device. Its inner wall is coated with a hydrophobic nano-coating 50 to 100 nanometers thick. This coating is composed of silica nanoparticles and a fluorosilane coupling agent, forming micro- and nano-scale papillary structures that allow the drug solution to have a contact angle greater than 150 degrees on its surface. This hydrophobic property effectively reduces the adhesion of the drug solution to the column wall, ensuring that the high-viscosity drug solution is completely drained near the end of the infusion, reducing residual loss of valuable drugs.

[0029] The transition ring 5 connects the liquid storage column 4 and the bottom column 6. The internal flow channel of the transition ring 5 is designed with a conical tapered structure, with the cone angle controlled between 25 and 35 degrees. This tapered geometry guides the fluid to a smooth transition, avoiding turbulence or eddies at points of abrupt change in cross-section, thus eliminating the risk of bubble formation induced by local pressure fluctuations. Both ends of the transition ring 5 are embedded with medical-grade silicone O-rings. Under the tightening force of the threads, the O-rings undergo radial deformation, filling the tiny gaps at the connection and ensuring no liquid leakage under 0.5 MPa pressure.

[0030] The core function of the flow rate control module is executed collaboratively by the wireless controller 3 and the liquid flow controller 2. The wireless controller 3 uses a dual-core microprocessor as its control core, integrating an RF receiving unit, signal demodulation circuitry, and complex logic processing units. When medical staff send control commands via the ward's central monitoring station or a handheld mobile terminal, the wireless controller 3 captures the RF signal through its built-in ceramic antenna. After amplification by a low-noise amplifier and denoising by a bandpass filter, the RF signal is restored to a baseband digital signal by the demodulation circuitry. The wireless controller 3 performs authentication and CRC checks on the digital signal, confirming the legitimate source of the command and the error-free data transmission, before parsing it into specific target flow rate parameters.

[0031] The flow controller 2 receives control pulses from the wireless controller 3. Specifically, the flow controller 2 includes a miniature geared stepper motor with a step angle of 1.8 degrees. The output shaft of this motor is connected to a precision planetary gear reducer with a transmission ratio of 1:50. The output shaft of the reducer drives an eccentric pressure wheel to rotate. The profile curve of the eccentric pressure wheel is precisely calculated, and its radius changes linearly or logarithmically with the rotation angle. The infusion tubing is positioned between the eccentric pressure wheel and a shaping groove on the inner wall of the control body 1. The rotation of the stepper motor causes the eccentric pressure wheel to shift angularly, thereby changing the radial compression depth on the infusion tubing. Because the tubing's cross-sectional area changes after being compressed, according to Poiseuille's law, the fluid resistance changes accordingly, thus achieving precise physical control of the drug flow rate.

[0032] The adaptive fuzzy control logic integrated within the wireless controller 3 addresses the challenges of actual infusion processes. As the fluid level decreases, static pressure diminishes, and changes in patient limb position cause fluctuations in tubing resistance. The adaptive fuzzy control logic calculates the deviation *e* between the target and actual flow rates, as well as the rate of change *e* of this deviation, by real-time reading of the actual flow rate from the drop sensor or electromagnetic flowmeter located at the guide tube 7. c The system will use e and e c The data is mapped to a fuzzy set and logical operations are performed using a pre-defined fuzzy rule inference engine. This rule inference engine considers nonlinear compensation factors and can adjust the PID parameters in real time according to the current error state, outputting the optimal stepper motor step number. This control method overcomes the lag and oscillation phenomenon of traditional proportional control when adjusting small flow rates, ensuring a smooth transition of flow velocity.

[0033] The logic redundancy controller employs a master-slave dual-machine hot standby architecture. The master processor handles routine control algorithm calculations, while the slave monitoring processor monitors the master processor's operating status in real time via a heartbeat frequency monitoring line. If the master processor experiences a program crash or logic failure due to electromagnetic interference, the heartbeat signal will be interrupted. At this point, the slave monitoring processor immediately triggers a hardware interrupt, taking over control of the liquid flow controller 2. The slave monitoring processor executes a safety protection protocol, locking the stepper motor in its current position or driving it to rotate to a preset minimum maintaining flow rate position to prevent uncontrolled liquid infusion or complete interruption. Simultaneously, the wireless controller 3 sends a device fault warning to a remote location via an independent alarm channel, requesting manual intervention.

[0034] The environmental compensation unit is connected to a high-precision integrated temperature and humidity sensor, which is installed near the air inlet of the control unit 1. Since the viscosity of the liquid medicine is significantly affected by temperature, in cold environments, the viscosity increases, and the same pipeline pressure will result in a lower-than-expected flow rate. The environmental compensation unit internally stores temperature and viscosity compensation curve models for common liquid medicines. When the ambient temperature fluctuates significantly, the compensation unit automatically calculates a pulse compensation amount and superimposes it onto the output of the adaptive fuzzy control logic.

[0035] As the final channel for the outflow of the liquid medicine, the guide tube 7 is covered by an insulation sleeve 8, which plays an important role in maintaining the temperature of the liquid medicine. The insulation sleeve 8 adopts a three-layer composite material structure. The innermost layer is a 0.05mm thick embossed aluminum foil reflective layer, which has extremely high infrared reflectivity and reflects the heat radiation emitted by the liquid medicine back into the pipeline.

[0036] The middle layer is a 3mm thick microporous polyurethane foam layer filled with still air, utilizing its extremely low thermal conductivity to block heat conduction loss. The outermost layer is a UV-resistant medical-grade PVC protective layer, providing physical protection and facilitating cleaning and disinfection. This multi-layer insulation mechanism ensures that the temperature drop of the preheated or room-temperature-flowing medication is controlled within 1 degree Celsius when it reaches the patient's blood vessel through a long infusion tubing.

[0037] To better understand this invention, its intelligent operation process follows the following steps:

[0038] After the device is turned on, the wireless controller 3 first performs a hardware self-test, including checking the battery level, calibrating the initial position of the stepper motor, and calibrating the sensor reference value.

[0039] Wireless controller 3 enters a low-power listening state and continuously detects wake-up signals within the wireless frequency band;

[0040] Upon receiving a control message containing the correct device ID, the wireless controller 3 uses its internal AES128 decryption algorithm to unpack the command and obtain the target flow rate setting value.

[0041] The wireless controller 3 confirms the absolute angle of the current eccentric clamping wheel through the encoder feedback of the liquid flow controller 2, and calculates the initial step distance required to reach the target flow rate;

[0042] Start the stepper motor to drive the eccentric clamping wheel to perform the initial adjustment action;

[0043] The drop count sensor begins to collect real-time drop count signals and converts them into instantaneous flow data, which is then fed back to the adaptive fuzzy control logic unit.

[0044] The environmental compensation unit collects the current temperature data of the ward in real time, corrects the current flow calculation model based on the temperature value, and adjusts the scaling factor of the fuzzy controller.

[0045] The fuzzy controller outputs fine-tuning pulses based on the corrected deviation signal, driving the stepper motor to perform closed-loop fine adjustment until the steady-state error between the real-time flow rate and the target flow rate enters the preset range of ±3%.

[0046] During the infusion process, a pressure sensor installed below the flow controller 2 monitors the radial pressure on the pipeline wall in real time;

[0047] If a sudden increase in pressure is detected and exceeds the preset safety threshold, the wireless controller 3 determines that there is a blockage downstream of the pipeline (such as needle blockage or pipeline folding), and immediately drives the motor to completely close the pipeline and issue an audible and visual alarm.

[0048] If the pressure value is detected to be continuously lower than the normal fluctuation range, it is determined that the upstream liquid is exhausted or the pipeline is disconnected, and the shutdown protection logic is executed.

[0049] The wireless controller 3 periodically encapsulates information such as the current infusion progress, flow rate curve, and remaining battery power into data packets and uploads them to the cloud database via the wireless network.

[0050] The logical redundancy controller continuously performs background self-tests to ensure that physical throttling is maintained in the event of a software system crash.

[0051] The heat insulation sleeve 8, through its physical heat insulation properties, continuously prevents heat from dissipating into the air as the liquid flows through the guide tube 7.

[0052] Once the infusion task is completed, the medical staff sends a reset command, and the flow controller 2 drives the clamping wheel to fully release the tubing, making it convenient for the medical staff to replace the infusion bag or disassemble the device.

[0053] Furthermore, to address potential extreme power depletion or electronic component damage during clinical use, a manual reset knob is installed on the side of the base column 6. This knob is mechanically coupled to the output shaft of the gearbox of the fluid flow controller 2 via an internal one-way overrunning clutch. In the power-off state, medical staff can use mechanical force to overcome the positioning torque of the stepper motor by rotating the knob clockwise, forcibly rotating the eccentric clamping wheel to the fully open position.

[0054] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0055] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A remotely controllable intelligent infusion care device for internal and surgical patients, characterized in that, The system includes a control body (1), which consists of a flow rate control module and a bottom column (6) fixedly connected to the bottom of the flow rate control module. The bottom column (6) has a hollow structure inside. The lower end of the bottom column (6) is connected to a guide tube (7), and the upper end is connected to a liquid storage column (4) through a threaded structure or a snap-fit ​​structure. The flow rate control module is equipped with a wireless controller (3) and a liquid flow controller (2) that is electrically connected to the wireless controller (3).

2. The apparatus according to claim 1, characterized in that, The wireless controller (3) integrates an adaptive fuzzy control logic unit, a logic redundancy controller, and an environmental compensation unit.

3. The apparatus according to claim 2, characterized in that, The adaptive fuzzy control logic unit calculates and outputs the corresponding stepper motor control pulse based on the deviation and rate of change between the set target flow velocity and the actual flow velocity fed back by the sensor, using a pre-stored fuzzy rule table.

4. The apparatus according to claim 1, characterized in that, The liquid flow controller (2) includes a micro stepper motor, a reduction gear set and an eccentric clamping wheel; the micro stepper motor rotates step by step according to the pulse signal output by the wireless controller (3), and drives the eccentric clamping wheel to move through the reduction gear set, so as to change the degree of clamping on the infusion tubing passing through the control body (1).

5. The apparatus according to claim 1, characterized in that, A transition ring (5) is provided between the liquid storage column (4) and the bottom column (6). The inner diameter of the transition ring (5) is tapered from top to bottom. Medical-grade silicone sealing rings are provided at the connection between the transition ring (5), the bottom column (6), and the liquid storage column (4).

6. The apparatus according to claim 1, characterized in that, The guide tube (7) is fitted with an insulation sleeve (8) on its outer periphery. The insulation sleeve (8) includes, from the inside out, a reflective aluminum foil layer, a polyurethane insulation layer and a medical-grade polyvinyl chloride protective layer.

7. The apparatus according to claim 2, characterized in that, The logic redundancy controller includes a main processing chip and a slave monitoring chip. The slave monitoring chip monitors the working status of the main processing chip in real time and takes over control when the main processing chip experiences a logic crash or outputs an abnormal signal.

8. The apparatus according to claim 1, characterized in that, The side wall of the bottom column (6) is provided with a manual reset knob, which is connected to the eccentric clamping wheel of the liquid flow controller (2) through a mechanical linkage mechanism.

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