Abstract:

Objective To investigate the effect of non humidification，200 ml and 100 ml distilled water humidification on oxygen output flow of Venturi mask，and to provide basis and reference for clinical application of Venturi mask oxygen therapy. Methods In August 2024，the output end of an oxygen flow meter installed with a water humidification device was connected with a Venturi mask and an external flow sensor of a ventilator in turn. The oxygen output flow of the Venturi mask was measured under the conditions of no humidification，200 ml distilled water humidification and 100 ml distilled water humidification，respectively，at oxygen concentration set of 24%，26%，28%，31%，35%，40% and 50%. The measured output flow data of the 3 groups were statistically analyzed. Results The oxygen output flow of the Venturi mask ranged from 7.6 to 45.6 L/min，and the input flow was 3 L/min or 6 L/min. The higher the oxygen concentration，the lower the oxygen output flow of the Venturi mask. Under the same oxygen concentration，the average output flow of 200 ml distilled water humidification group was lower than that of 100 ml distilled water humidification group and non humidification group（P<0.05）. When the oxygen concentration was set at 24%，26%，31% and 35%，the oxygen output flow of non humidification group was higher than that of 100 ml distilled water humidification group（P<0.05）. At 40% and 50% oxygen concentration，the oxygen output flow of 100 ml distilled water humidification group was higher than that of non humidification group（P<0.05）. Conclusion The overall output flow of the Venturi mask is low，and the input flow is the same. The higher the oxygen concentration，the lower the output flow. The humidification of 200ml distilled water may lead to insufficient oxygen flow in patients，while the humidification of 100ml distilled water has little effect on the output flow of Venturi mask.

Key words: Humidification, Venturi Mask, Flow, Oxygen Therapy, Concentration, Nursing

摘要：

目的 探讨无湿化、200 ml和100 ml蒸馏水湿化对文丘里面罩输出氧流量的影响，为临床应用文丘里面罩实施氧气吸入疗法提供依据和参考。 方法 2024年8月，将安装有入水湿化装置的氧气流量表输出端依次与文丘里面罩、呼吸机外置流量传感器连接，分别测出在无湿化、200 ml蒸馏水湿化及100 ml蒸馏水湿化条件下，文丘里面罩在设定24%、26%、28%、31%、35%、40%、50%氧浓度时输出的氧流量，并将所测得的3组输出氧流量数据进行统计学分析。 结果 文丘里面罩输出氧流量范围为7.6~45.6 L/min，当输入氧流量为3或6 L/min时，调节氧浓度越高，文丘里面罩输出氧流量越低。在相同氧浓度下，200 ml蒸馏水湿化组平均输出氧流量均低于100 ml蒸馏水湿化组和无湿化组（P<0.05）。在设定氧浓度为24%、26%、31%和35%时，无湿化组输出氧流量高于100 ml蒸馏水湿化组（P<0.05）；在设定40%和50%氧浓度时，100 ml蒸馏水湿化组输出氧流量高于无湿化组（P<0.05）。 结论 文丘里面罩整体输出氧流量偏低，输入流量相同时，氧浓度越高，输出氧流量越低。在临床中应用200 ml蒸馏水湿化可能导致患者吸入氧流量不足，而应用100 ml蒸馏水湿化对文丘里面罩输出氧流量影响不大。

关键词: 湿化, 文丘里面罩, 流量, 氧气吸入疗法, 浓度, 护理