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    • 8. 发明授权
    • Respiratory gas monitor
    • 呼吸气体监测仪
    • US5285794A
    • 1994-02-15
    • US990203
    • 1992-12-14
    • Thomas J. Lynch
    • Thomas J. Lynch
    • A61B5/083
    • A61B5/083
    • A method and apparatus for monitoring the respiratory gas of a patient includes an adjustable volume gas mixing chamber which allows for the differences in lung capacity of patients from neonate to adult. A constant flow of a therapeutic gas mixture is measured by a flow meter in a supply line leading to a face mask breathing device. The mask is by-pass connected to the supply line such that the patient inspires from and exhales into the flow from the supply line. Both by-pass and expired gas mix and enter the adjustable-volume chamber, which contains an internal fan and sensors for detecting percentage content of oxygen and carbon dioxide. The chamber is adjusted to a volume where the sensor readings become stable rather than pulsatile. The change in percentages of oxygen and carbon dioxide content in the chamber, as compared to the content in the supply gas, is then entirely due to total-body consumption and production. Whole body rates can be determined by multiplying the percentage change by the flow rate in the supply line.
    • 用于监测患者呼吸气体的方法和装置包括可调体积气体混合室,其允许患者从新生儿到成人的肺容量差异。 治疗气体混合物的恒定流量通过通向面罩呼吸装置的供应管线中的流量计来测量。 掩模被旁路连接到供应管线,使得患者从供应管线起动和呼出。 旁路和过期气体混合并进入可调节容积室,其中包含内部风扇和用于检测氧气和二氧化碳含量百分比的传感器。 腔室被调节到传感器读数变得稳定而不是脉动的体积。 与供应气体的含量相比,室内的氧气和二氧化碳含量的百分比变化完全是由于全身消耗和生产。 可以通过将百分比变化乘以供应线中的流量来确定整体体重。