高原高空及坑洞施工现场长管道吸氧效果研究

目的:研究分析高原高空及坑洞内施工现场长管道吸氧的效果。方法:在海拔约3 600、4 200、4 800 m的施工现场,各随机选取高原高空及坑洞作业者40名(高空及坑洞作业者各20名),吸氧前先测血氧饱和度3次,计算出平均值,再用50 m长管道,连接40 L氧气瓶以10、5、2.5 MPa压力,4 L/min的氧流量吸氧3 min后测量血氧饱和度3次,每次间隔1 min,计算出平均值,并进行对比分析。结果:在高原不同海拔高度的高空及坑洞内用长管道、以不同供氧压力、相同氧流量吸氧后血氧饱和度都显著提高,有统计学意义(P<0.01)。结论:高原高空及坑洞内施工现场长管道吸氧能显著提高血氧饱和度,改善缺氧,是解决高原高空及坑洞内作业缺氧的一种简单、易行、安全、有效的方法。

Feasibility study of long-pipeline oxygen inhalation at high-altitude construction sites above ground and in potholes

Objective:To study the effect of oxygen inhalation by using a long pipeline in the construction sites above the ground and in the potholes in the plateau.Methods: Forty subjects(20 aerial personals and 20 pit operators) were admitted for each group at the altitude of 3 600 m,4 200 m or 4 800 m.The blood oxygen saturation was determined for 3 times before oxygen inhalation and the average value was calculated.The oxygen was inhaled through a 50-metre-long pipeline connected to a 40-litre-volume oxygen bomb with the pressure of 2.5,5 or 10 MPa.The blood oxygen saturation was tested again after oxygen inhalation(4 L/min) for 3 times at an interval of one minute,the average value was calculated,and the contrastive analysis was carried out.Results: The blood oxygen saturation in subjects above the ground or in the potholes was significantly improved after long-pipeline oxygen inhalation with the different oxygen pressure and the same oxygen flow rate(P<0.01).Conclusion: The long-pipeline oxygen inhalation at the high-altitude construction sites above the ground or in the potholes could increase the blood oxygen saturation and improve hypoxia,which may be a simple,safe and effective method for the treatment of hypoxia in people working at the construction sites above the ground or in the potholes in the plateau.