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22. 发明授权

US4587966A Device for evaluating the mixing of liquid anesthetic and a respiratory gas for patients 失效
标题翻译：用于评估患者液体麻醉剂和呼吸气体混合的装置
公开(公告)号：US4587966A
公开(公告)日：1986-05-13
申请号：US531689
申请日：1983-09-13
申请人： Scato Albarda
发明人： Scato Albarda
IPC分类号： A61M16/14 , A61M16/12 , A61M16/18 , A61M16/00
CPC分类号： A61M16/18 , A61M2205/3368 , A61M2205/3653 , Y10S261/65
摘要： A device for admixing liquid anesthetics into the respiratory gas to be supplied to a patient makes it possible to monitor the concentration, the flow of respiratory gas, the mixture ratio, and the flow of anesthetic. Errors may thus be indicated and safety is increased in medical practice. The device utilizes the phenomonen that during the evaporation of an anesthetic admixed with the respiratory gas, the temperature in the thermally insulated ambience of the mixing chamber drops by an amount depending on the ratio of the vaporized anesthetic to the respiratory gas, thus on the concentration. The temperatures are measured at the inlet of the mixing chamber by an inlet sensor and an intermediate sensor, and at the outlet of the mixing chamber by an outlet sensor. Upon heating the stream of respiratory gas by means of a heating element in the inlet portion, the breathing gas flow, its mixing ratio, and the flow of anesthetic can be measured, and thus the concentration can be determined from the necessary heating power input and the heating temperature. The measurement is effected by a heater control and evaluating circuit connected to the sensors and the heater, by which heater controlling measures are effected upon deviations from desired values.
摘要翻译：用于将液体麻醉剂混合到要供应给患者的呼吸气体中的装置使得可以监测浓度，呼吸气体的流量，混合比和麻醉剂的流量。因此，医疗实践中可能会指出错误，安全性增加。该装置利用在与呼吸气体混合的麻醉剂的蒸发期间的混合物，混合室的隔热环境中的温度下降一定量，这取决于蒸发的麻醉剂与呼吸气体的比例，因此浓度。通过入口传感器和中间传感器在混合室的入口处测量温度，并通过出口传感器在混合室的出口处测量温度。通过入口部分中的加热元件加热呼吸气体流，可以测量呼吸气体流量，其混合比和麻醉剂流量，从而可以根据必要的加热功率输入和加热温度。测量由连接到传感器和加热器的加热器控制和评估电路来实现，通过该加热器控制和评估电路，在与期望值偏离的情况下进行加热器控制措施。

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