微机控制的挥发性麻醉药给药装置的实验研究

An Experimental Study of the Computer-Controlled Equipment for Delivering Volatile Anesthetic Agent

微机控制的挥发性麻醉药给药装置 ,由单片微机做中央控制单元 ,由计算机键盘输入 :高流量或全紧闭麻醉方式、麻醉药的种类、麻醉机呼吸环路的容积、病人的年龄、性别、身高、体重、环境温度、病人的ASA分级等变量 ,由单片机运算出高流量或全紧闭麻醉所需的麻醉药用量 ,将其转变成控制信号 ,控制执行泵向麻醉环路精确泵入麻醉药。设计检测电路对执行泵的工作状态监测 ,保证装置的工作稳定、安全。对其进行静态实验测试装置在高流量状态下输出精度 1～ 2 % ,在全紧闭状态下精度在 1～ 5 %。自检装置工作可靠 ,系统抗干扰性好。

Our newly designed computer controlled equipment for delivering volatile anesthetic agent uses the subminiature singlechip processer as the central controlling unit. The variables, such as anesthesia method, anesthetic agent, the volume of respiratory loop, age of patient, sex, height, weight, environment temperature and the grade of ASA are all input from the keyboard. The anesthetic dosage, calculated by the singlechip processor, is converted into the signals controlling the pump to accurately deliver anesthetic agent into respiratory loop. We have designed an electrocircuit for the equipment to detect the status of the pump's operation, so we can assure of the safety and the stability of the equipment. The output precision of the equipment, with a good anti jamming capability, is 1—2% for high flow anesthesia and 1—5% for closed circuit anesthesia and its self detecting working is reliable.