CN-121987889-A - Portable intelligent transfusion pressurization and flow velocity control system

CN121987889ACN 121987889 ACN121987889 ACN 121987889ACN-121987889-A

Abstract

The invention relates to the technical field of medical equipment, in particular to a portable intelligent transfusion pressurization and flow rate control system. The system comprises a central control unit, a sensor monitoring module, an infusion pressurizing module, a flow rate control module, a man-machine interaction module and a power management module, wherein the central control unit is respectively connected with the modules and internally provided with a temperature-pressure cooperative compensation algorithm for calculating target pressure, the sensor monitoring module comprises a temperature sensor, a pressure sensor and an ultrasonic sensor, the infusion pressurizing module comprises a left fixed clamping plate, a right movable clamping plate, an electric push rod, an inflatable bag, a miniature air pump and a pressure relief valve, and the flow rate control module comprises a peristaltic pump.

Inventors

TONG SHICHAO
RONG XIAOLEI
XIA CHUNYU

Assignees

中国人民解放军联勤保障部队第九六六医院

Dates

Publication Date: 20260508
Application Date: 20260408

Claims (6)

1. A portable intelligent infusion pressurization and flow rate control system, comprising: the central control unit comprises a microcontroller which is respectively connected with the sensor monitoring module, the infusion pressurizing module, the flow rate control module, the man-machine interaction module and the power management module through interfaces, wherein a temperature-pressure cooperative compensation algorithm is arranged in the microcontroller and is used for receiving data acquired by the sensor monitoring module, dynamically calculating target pressure, generating a control instruction according to the target pressure and sending the control instruction to the infusion pressurizing module and the flow rate control module; The sensor monitoring module comprises a temperature sensor, a pressure sensor and an ultrasonic sensor, and is used for monitoring liquid temperature, air bag pressure, liquid flow rate and air bubble data and sending the data to the central control unit; The infusion pressurizing module comprises a left fixed clamping plate, a right movable clamping plate, an electric push rod, an inflatable bag, a micro air pump and a pressure release valve, wherein the infusion pressurizing module is used for pre-inflating air into the inflatable bag through the micro air pump in advance to form basic pressure, receiving a control instruction issued by a central control unit in the infusion process, driving the electric push rod to adjust the position of the right movable clamping plate by adopting a closed loop control algorithm, and enabling the inflatable bag to apply adjustable extrusion force to the infusion bag until reaching target pressure by changing the distance between the left fixed clamping plate and the right movable clamping plate; the flow rate control module comprises a peristaltic pump and is used for receiving a control instruction sent by the central control unit, adjusting the rotating speed of the peristaltic pump according to the control instruction and adjusting the liquid flow rate by periodically extruding the infusion tube; the man-machine interaction module comprises a display screen, wherein the display screen is connected with the central control unit, and is used for receiving infusion parameters input by a user, transmitting the infusion parameters to the central control unit and displaying system state data in the infusion process; the power management module comprises a rechargeable battery and a power conversion circuit, and is used for converting the voltage of the rechargeable battery into the working voltage of each module through the power conversion circuit, monitoring the electric quantity of the battery in real time and sending the electric quantity to the central control unit.
2. The portable intelligent transfusion pressurization and flow rate control system according to claim 1, further comprising a rewarming bag, wherein the rewarming bag is a bag body for accommodating a transfusion bag, a heat preservation layer and a PTC ceramic sheet heating film are arranged in the bag body, and the PTC ceramic sheet heating film is connected with the power management module and used for heating liquid in the transfusion bag according to a control instruction sent by the central control unit.
3. The system of claim 1, wherein the central control unit has a built-in temperature-pressure cooperative compensation algorithm, and the algorithm specifically comprises: determining a temperature compensation pressure value according to the liquid temperature acquired by the temperature sensor, the preset reference pressure and the dynamic viscosity compensation coefficient; determining a flow rate correction pressure value according to the liquid flow rate acquired by the ultrasonic sensor and a preset target flow rate; And superposing the temperature compensation pressure value and the flow velocity correction pressure value to obtain a target pressure value.
4. The portable intelligent transfusion pressurization and flow rate control system according to claim 2 is characterized in that in the transfusion pressurization module, a left fixed clamping plate is fixed on the inner wall of a rewarming bag and is used as a fixed supporting back plate to be in contact with one side of a transfusion bag, a right movable clamping plate and the left fixed clamping plate are fixed on the outer side of an inflatable bag in a relative arrangement mode and are used for applying pressure to the transfusion bag through the inflatable bag, an electric push rod is connected with the central part of the outer side of the right movable clamping plate and is used for driving the right movable clamping plate to move towards the left fixed clamping plate, the inflatable bag is a flexible sealing bag body and is arranged between the right movable clamping plate and the transfusion bag and used for uniformly distributing pressure applied by the right movable clamping plate to the surface of the transfusion bag, a micro air pump is connected with an air inlet of the inflatable bag through an air pipe, and a pressure release valve is connected with an air outlet of the inflatable bag through the air pipe.
5. The intelligent transfusion pressurization and flow rate control system according to claim 1, wherein the closed-loop control algorithm adopted in the transfusion pressurization module is a nonlinear PID algorithm, and specifically comprises: Acquiring the pressure of the inflatable bag acquired by the pressure sensor, and acquiring a pressure deviation value according to the target pressure and the pressure of the inflatable bag sent by the central control unit; acquiring a proportion adjustment quantity in a nonlinear PID algorithm according to the absolute value of the pressure deviation value; Acquiring integral adjustment quantity in a nonlinear PID algorithm according to the integral value of the pressure deviation value; acquiring differential adjustment quantity in a nonlinear PID algorithm according to differential values of the pressure deviation values; Superposing according to the proportional regulating quantity, the integral regulating quantity and the differential regulating quantity to obtain a driving instruction of the electric push rod; And driving the electric push rod to adjust the position of the right movable clamping plate according to the driving instruction.
6. The portable intelligent transfusion pressurization and flow rate control system according to claim 1 is characterized in that in the sensor monitoring module, a temperature sensor is fixed on the outer wall of a transfusion bag through a flexible silica gel patch, a pressure sensor is connected to the outer side of the inflatable bag through a sealing O-shaped ring interface, and an ultrasonic sensor is fixed on the outer wall of a transfusion tube through a magnetic attraction base.

Description

Portable intelligent transfusion pressurization and flow velocity control system Technical Field The invention relates to the technical field of medical equipment, in particular to a portable intelligent transfusion pressurization and flow rate control system. Background In the field medical rescue or remote region transportation process, the traditional transfusion system relies on hanging a transfusion bag to provide gravity pressure, so that the operation is inconvenient, the transfusion system is easy to be disturbed by the environment, the viscosity of transfusion liquid is obviously increased under cold conditions to cause flow velocity fluctuation, and meanwhile, the transfusion bag cannot be placed in a wounded rewarming bag for heat preservation, so that the temperature of the liquid is too low, and transfusion interruption or discomfort of a patient is caused; the prior art discloses a portable electric infusion pump which controls the flow rate through a peristaltic pump and integrates a basic bubble detection function, but does not solve the problem of temperature-pressure coupling in a cold environment, and the device only maintains fixed pressure under a low temperature condition, can not dynamically adjust pressure according to the change of liquid viscosity, and causes larger flow rate fluctuation, and meanwhile, the bubble detection still depends on the mechanical flow stopping clamp, so that the response delay can not meet the clinical safety requirement far. Disclosure of Invention In order to solve the problems in the prior art, the invention provides a portable intelligent transfusion pressurization and flow rate control system. The system comprises a central control unit, a sensor monitoring module, an infusion pressurizing module, a flow rate control module, a man-machine interaction module and a power management module, wherein the central control unit is respectively connected with the modules and internally provided with a temperature-pressure cooperative compensation algorithm for calculating target pressure, the sensor monitoring module comprises a temperature sensor, a pressure sensor and an ultrasonic sensor, the infusion pressurizing module comprises a left fixed clamping plate, a right movable clamping plate, an electric push rod, an inflatable bag, a miniature air pump and a pressure relief valve, and the flow rate control module comprises a peristaltic pump. The invention adopts the following technical scheme that the portable intelligent transfusion pressurization and flow rate control system comprises: the central control unit comprises a microcontroller which is respectively connected with the sensor monitoring module, the infusion pressurizing module, the flow rate control module, the man-machine interaction module and the power management module through interfaces, wherein a temperature-pressure cooperative compensation algorithm is arranged in the microcontroller and is used for receiving data acquired by the sensor monitoring module, dynamically calculating target pressure, generating a control instruction according to the target pressure and sending the control instruction to the infusion pressurizing module and the flow rate control module; The sensor monitoring module comprises a temperature sensor, a pressure sensor and an ultrasonic sensor, and is used for monitoring liquid temperature, air bag pressure, liquid flow rate and air bubble data and sending the data to the central control unit; The infusion pressurizing module comprises a left fixed clamping plate, a right movable clamping plate, an electric push rod, an inflatable bag, a micro air pump and a pressure release valve, wherein the infusion pressurizing module is used for pre-inflating air into the inflatable bag through the micro air pump in advance to form basic pressure, receiving a control instruction issued by a central control unit in the infusion process, driving the electric push rod to adjust the position of the right movable clamping plate by adopting a closed loop control algorithm, and enabling the inflatable bag to apply adjustable extrusion force to the infusion bag until reaching target pressure by changing the distance between the left fixed clamping plate and the right movable clamping plate; the flow rate control module comprises a peristaltic pump and is used for receiving a control instruction sent by the central control unit, adjusting the rotating speed of the peristaltic pump according to the control instruction and adjusting the liquid flow rate by periodically extruding the infusion tube; the man-machine interaction module comprises a display screen, wherein the display screen is connected with the central control unit, and is used for receiving infusion parameters input by a user, transmitting the infusion parameters to the central control unit and displaying system state data in the infusion process; the power management module comprises a rechargeable battery and a power conve