Effect of Dyspnea Induced by Breath-holding on Maximal Muscular Strength of Patients with COPD.
Effect of Dyspnea Induced by Breath-holding on Maximal Muscular Strength of Patients with COPD.
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DOI：
10.1589/jpts.26.255
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发表时间：
2014-02
影响因子：
--
通讯作者：
Kanezaki M
中科院分区：
文献类型：
--
作者：
Shingai K;Kanezaki M
[目的]探讨屏气呼吸困难对慢性阻塞性肺疾病（COPD）患者最大肌力的影响。[受试者]本研究通过公开发布招募了14名COPD受试者。[方法]采用改良博格呼吸困难量表评定呼吸困难。受试者要求在呼气末停止呼吸，并尽可能长时间地用鼻夹屏住呼吸。用计时器测量总屏气时间和呼吸困难阈值时间。呼吸困难储备时间（DRT）定义为从总屏气时间中减去感知呼吸困难的阈值时间，以计算50% DRT。在基线、呼吸困难50%阈值时间（呼吸困难阈下点）和50% DRT（呼吸困难阈上点）测量最大握力收缩的肌肉强度。[结果]呼吸困难阈上点的最大握力值明显低于基线值和阈下点的最大握力值。基线和呼吸困难值的阈下点之间的最大肌肉力量没有统计学显著差异。[结论]屏气引起的呼吸困难可加重COPD患者的最大肌力下降。
[Purpose] The purpose of the present study was to clarify the effect of dyspnea induced by breath-holding on maximum muscular strength of patients with COPD. [Subjects] This study recruited 14 COPD subjects via public posting. [Methods] Dyspnea was assessed by the modified Borg scale. The subject asked to stop breathing at end-expiration and to hold their breath with a nose clip for as long as possible. Both total breath-holding time and threshold time of dyspnea were measured with a chronograph. Dyspnea reserve time (DRT) was defined by subtracting the threshold time of perception dyspnea from total breath-holding time in order to calculate the 50% DRT. The muscular strengths of maximal handgrip contraction were measured at baseline, 50% threshold time of dyspnea (subliminal point of dyspnea), and the 50% DRT (supraliminal point of dyspnea). [Results] The maximal handgrip at the supraliminal point of dyspnea was significantly lower than the baseline and subliminal point of dyspnea values. There was no statistically significant difference in maximal muscular strength between baseline and the subliminal point of dyspnea value. [Conclusion] The present results demonstrate that dyspnea induced by breath-holding aggravates weakness in the maximum muscular strength of patients with COPD.
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DOI：
10.1164/rccm.200812-1873oc
发表时间：
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影响因子：
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发表时间：
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