Chopin C, Chambrin M C, Gosselin B, Durocher A, Wattel F
Anesth Analg (Paris). 1979;36(9-10):417-21.
A medical application of a microprocessor system is presented. The definition of a system able to control the quality of the respiratory exchanges for a patient submitted to artificial ventilation is given. The measurement system is composed by two rapid analysers of CO2 and O2 (Beckman LB2 and OM 11), a flow meter devices and an airway pressure sensor (Monaghan M 700). The monitoring of the ventilation is based on the determination of FAECO2 simultaneous the determination of FECO2, FIO2, FEO2 and FAEO2 allow, with the sequential entries of the blood gaz values, to calculate: VA/V, D (a--A) CO2, D (A--a) O2, VO2, VCO2 and respiratory quotient. Now, we are working out a system composed by: a microprocessor (Intel 8080) which allows acquisition and treatment of the signals; a peripherical with a key board for the dialogue between the operator and the system; a visual display unit and a printer. Measurements are made on the patient every 13 mn during five respiratory cycles. All the stated above parameters are then computed. When there is a variation of FAECO2, an alarm is triggered, of predeterminated threshold is exceeded. This system simple, not too expensive, not invasive, has been conceived to work on one to four patients.
介绍了一种微处理器系统的医学应用。给出了一个能够控制接受人工通气患者呼吸交换质量的系统的定义。测量系统由两台二氧化碳和氧气快速分析仪（贝克曼LB2和OM 11）、一个流量计装置和一个气道压力传感器（莫纳根M 700）组成。通气监测基于呼出二氧化碳分数（FAECO2）的测定，同时测定呼气末二氧化碳分数（FECO2）、吸入氧分数（FIO2）、呼气末氧分数（FEO2）和肺泡-动脉氧分压差（FAEO2），通过依次输入血气值，可以计算：肺泡通气量/分钟通气量（VA/V）、二氧化碳肺泡-动脉分压差（D(a--A)CO2）、氧肺泡-动脉分压差（D(A--a)O2）、氧耗量（VO2）、二氧化碳排出量（VCO2）和呼吸商。现在，我们正在研发一个由以下部分组成的系统：一个允许采集和处理信号的微处理器（英特尔8080）；一个带有键盘用于操作员与系统对话的外围设备；一个可视显示单元和一台打印机。在五个呼吸周期内，每隔13分钟对患者进行一次测量。然后计算上述所有参数。当呼出二氧化碳分数（FAECO2）发生变化且超过预定阈值时，触发警报。这个系统简单、成本不高、非侵入性，设计用于一至四名患者。
