Study and realization of control system for venous transfusion automatic dispensing apparatus

Abstract

Many disadvantages exist in human intravenous infusion preparation process, with cross contamination. Effectively prevent intravenous fluids should be dispensed pollution, this paper introduces the automatic dispensing device structure and working principle of the control system, the experimental results show that this system operation is simple, dissolution and improve the quality of the infusion preparation with high efficiency. Introduction Intravenous transfusion is one of the common treatment measures for clinical treatment and rescue of patients. The drug directly enters human blood by intravenous drip, and has a high absorption rate and quick effect.. Therefore, the intravenous drip of drug indicators should be strict requirements, once the quality of the problem will directly affect human health, and even life-threatening. At present, each big hospital intravenous infusion preparation center, occupy large area and additional facilities investment, drug preparation have medical personnel manual preparation, medical staff labor intensity big, in the process of operation exists many disadvantages, for example, visible particles, The phenomenon of the dissolved particles and the microorganism and other factors pollution liquid is common. Dispensing robot Canada intelligent hospital systems, research on trial in hospital, preparation of high precision, but covers an area of area is larger, the weight of a large, some execution mechanism design is too complicated. Although there are other companies, such as MDS and Panasonic also have involved in the field, but there is no product available, China is still a blank in the field. Dispensing tester In this paper, the design of the venous transfusion automatic preparation instrument with PLC as the controller and the touch screen to do as the host computer, take a step motor control technology, under the full closed sterile environment, with liquid, fully automated operation. The instrument can realize the liquid in the closed condition, by scanning gun hospital with liquid electronic prescription, medical personnel will be bottles of liquid medicine is put in the specified location, drug under the function of automatic push / ceiling system, infusion bottle to drug injection in the medicine bottle, after a specified number of repeated preparation, until the International Conference on Computational Science and Engineering (ICCSE 2015) © 2015. The authors Published by Atlantis Press 357 photometric meter of liquor turbidity value detection qualified, configured liquid transported back to the original liquid dropping bottle, in order to achieve venous transfusion automatic configuration and monitoring. Dispensing apparatus Mainly by the electrical control system, piping system, networking system and accessories. Electrical control system Dispensing apparatus control system is mainly composed of Beijing KunLun Winton, PLC, touch screen scanning gun, spectrophotometer, sensor, stepper motor and drive equipment. PLC control system PLC accepts the signal of the photoelectric sensor, control two stepper motor coordinated motion, completed the dispensing system automatically push liquid and water absorption and drug dissolution is the power source of the dispensing system for Chinese medicine liquid. PLC input point is mainly of speed-up in the origin of the motor and limit position sensor signal, single runway into the motor start and stop signal and emergency stop signal. The output signal of PLC contains the running state and output indicator system PTO two stepper motor etc.. Fig.1 control system Man-machine interface Using the man-machine interface as the monitoring system, the real-time data of PLC is displayed, recorded, stored, processed, and thus meets all kinds of monitoring requirements.. Considering the system compatibility and expansibility, the Beijing Tongtai KunLun touch screen. The interface includes user right interface, parameter setting interface, automatic monitor screen, database interface, alarm picture and so on.. In the automatic monitoring picture, the system starts the stop button, the change disposition strategy, displays the pharmacy stock, the display each part of the movement condition and so on. User rights interface, with access to the medical staff before entering the appropriate interface, password error input three times, will lock screen. The parameters of the interface, the communication parameters of PLC and spectrophotometer, the running speed of the stepping motor and the washing of the pipeline, etc.. The database interface, the compatibility between the drug compatibility taboo table, after the pharmacist audit through the query compatibility tabu list database to determine the incompatibility taboo. Add the basic information and medication records to the system database, and can be readily consulted in the future treatment, and with reference to the previous medication to determine the