Chest:吸氧对COPD患者6分钟步行试验结果的短期影响

2017-04-17 xiangting MedSci原创

与NOX相比, HYX和EIH患者能通过吸氧增加运动能力。然而达到临床改善阈值的患者还不到一半。这些氧气应答者的特点是运动能力水平显著下降。

COPD患者运动中吸氧的急性期反应与正常人有明显不同。但是什么因素影响了氧气反应仍然未知。近日呼吸领域权威杂志Chest上发表了一篇文章,旨在探讨吸氧对COPD患者6分钟步行结果的影响。

采用随机、单盲的方式,124COPD患者分别进行两次6分钟步行试验,其中一次吸入氧气(6MWTO2),另外一次吸入室内空气。两种气体均通过标准鼻塞(2L / min)输送。为了便于分析,按PaO2值将患者分层比较:(134例静息低氧血症(HYX)患者;(243例运动性低氧血症患者(EIH);(331例正常血氧(NOX)。

研究结果显示,吸氧使得整个队列(27±42米,P <0.001)、HYX亚组(37±40米,P <0.001)和EIH亚组(28 ±44米,P <0.0016分钟步行距离增加,而NOX亚组(15±43米,P = 0.065)无增加。42%HYX患者和47%EIH患者通过吸氧将6分钟步行距离改善至临床相关程度(≥30米)。与没有反应的患者相比,这些氧气应答者的特征是使用室内空气6分钟步行距离显著下降(306±106米对358±113米; P <0.05)。尽管6MWTO2的氧饱和度明显高于所有3个亚组吸入室内空气时的氧饱和度,但73.5%HYX患者在6MWTO2期间,氧饱和度降至88%以下。

由此可见,与NOX相比, HYXEIH患者能通过吸氧增加运动能力。然而达到临床改善阈值的患者还不到一半。这些氧气应答者的特点是运动能力水平显著下降。

原始出处:

Inga Jarosch, MSc, et al. Short-term Effects of Supplemental Oxygen on 6-Min Walk Test Outcomes in Patients With COPD: A Randomized, Placebo-Controlled, Single-blind, Crossover Trial. Chest. April 2017.

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    2017-11-13 yuanming15
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    2018-03-19 Smile2680
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    2017-04-19 gous

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