Practical model for the navigation system applicable to low flow anesthesia.

麻醉机的操作控制是一项需要熟练操作的技术。除自动控制外，操作支撑机构也是未来的重要技术。研究了麻醉机操作导航系统，考虑了低流量麻醉机的使用情况。建立了导航器的理论模型，并对导航器的用户输入界面进行了研究。为了在实际层面上构建模型，我们为麻醉机引入了以下三点。它包括用于麻醉回路的多室，麻醉吸收室在CO_2吸收剂上。我们将模型与考虑死腔和肺分流的体侧模型联系起来。该模型用于全封闭式麻醉机physioflex^<TM>的行为分析。并将该模型应用于麻醉气体监测仪RAMSCAN （Central uni Co ., Tokyo, Japan）。并将模型预测值与实测值进行了比较。颈内静脉浓度比潮末麻醉浓度测量值更接近脑内模拟值。另一方面，如果引入两种通用输入法，则很容易满足麻醉过程中必要的输入项目。一种是具有时间戳的事件类型输入的输入法，另一种是没有时间戳的检查表类型输入法。据了解，该输入法具有高速输入能力，也可用于电子麻醉记录仪。用Symlink^<TM>开发了麻醉模拟器程序，用Visual Basic开发了输入程序QA1，并对导航器进行了试验研究。我们将继续对麻醉导航仪的实际应用进行进一步的研究。

The operation control of the anesthesia machine is a technology that requires skilling. Besides automatic control, the operation support mechanism is also useful as the technology in the future. We researched the navigator for the operation of anesthesia machine, by which the anesthesia machine for low flow was taken into consideration. We made a theoretical model for the navigator, and researched the user input interface for this navigator.To construct the model at a practical level, we introduced the following three points for the anesthesia machine. It includes multi-compartments for the anesthesia circuit, an anesthetic absorbing compartment on to the CO_2 absorbent. We connected the models with the body side model by which dead space and pulmonary shunt were considered.This model was used to analyze behavior of total closed type anesthesia machine, physioflex^<TM>. Moreover, this model was applied to anesthesia gas monitor RAMSCAN (Central uni Co, Tokyo, Japan). And we did the try compared with the model predict value and the measurement value. The concentration in the internal jugular vein was closer to the simulation value in the brain than the measurement of end-tidal anesthetic concentration.On the other hand, if two general input methods are introduced, it easily satisfies the necessary input items during anesthesia. One is an input method to the event type input having time stamp and an input method of the checklist type without the time stamp. It has been understood that this input method has the high-speed input ability that can be used also for the electronic anesthesia record keeper. Anesthesia simulator program by Symlink^<TM> and input program QA1 by Visual Basic were developed, and the research by which the navigator was made for trial purposes was done.We keep researching further for the practical use of the anesthetizing navigator.