Davidson A C, Leach R, George R J, Geddes D M
London Chest Hospital.
Thorax. 1988 Dec;43(12):965-71. doi: 10.1136/thx.43.12.965.
The influence of supplemental oxygen on exercise performance was assessed in 17 patients with severe airflow obstruction. Exercise capacity was measured by the six minute walking distance, by an endurance walking test, and by an endurance cycling test and comparison was made with performance when the patient was breathing air. In addition, the relation between the flow rate of supplemental oxygen and cycling endurance time was studied. Portable oxygen (41 min-1) carried by the patient increased the mean endurance walking time by 59% and the six minute walking distance by 17%. The endurance time for cycling at a constant work load was increased by 51% with oxygen at a flow rate of 21 min-1, by 88% at 41 min-1, and by 80% at 61 min-1. Supplemental oxygen prolonged the length of time that the patients were able to walk at a fixed speed. It also increased the mean speed achieved during a six minute walk but this was variable and did not occur in all the subjects. The benefit from supplemental oxygen was not cancelled by the effort of carrying the portable cylinder.
对17例严重气流阻塞患者评估了补充氧气对运动能力的影响。通过6分钟步行距离、耐力步行试验和耐力自行车试验来测量运动能力，并与患者呼吸空气时的表现进行比较。此外，还研究了补充氧气的流速与自行车耐力时间之间的关系。患者携带的便携式氧气（4 l/min）使平均耐力步行时间增加了59%，6分钟步行距离增加了17%。在恒定工作负荷下骑自行车的耐力时间，在氧气流速为2 l/min时增加了51%，在4 l/min时增加了88%，在6 l/min时增加了80%。补充氧气延长了患者能够以固定速度行走的时间。它还提高了6分钟步行期间达到的平均速度，但这是可变的，并非在所有受试者中都出现。携带便携式氧气瓶的努力并没有抵消补充氧气带来的益处。
