Q-G动作与航空供氧装备的匹配性及与加压呼吸的兼容性

Compatibility of Q-G maneuver with aircraft oxygen system and positive pressure breathing

5名经过Q－G和L－1动作训练的健康男性被试者，在不加压、加压4kPa和6kPa三种呼吸条件下分别作Q－G和L－1两种抗G动作，记录其呼吸参数。结果表明，Q－G动作时最大呼气流速平均值为1．175～1．645L／S，最大吸气流速平均值为1．003～1．297L／S，明显低于L－1动作时，与现行航空供氧装备的性能匹配。血压和心率记录的结果表明，加压呼吸能进一步提高Q－G动作时的升血压效果，减轻疲劳。

Five male subjects, having been trained in Q-G and L-1 maneuvers, performed Q-G andL-1 maneuvers without and with PPB at 4 and 6 kPa. During the test their respiratory parameters wererecorded. The results demonstrated that, during Q-G maneuver both maximal expiratory flow rate(averaged 1. 175~1. 645 L/s) and inspiratory peak flow (1.003~1. 297 L/s) were significantly lowerthan those during L-1 maneuver, well matched with current aircraft oxygen system. According toblood pressure and heart rate, it is evident that PPB can further promote the blood pressure raisingeffect of Q-G maneuver,and alleviate fatigue resulted from repeated and prolonged maneuvering.