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Rib cage distortion and dynamic hyperinflation during two exercise intensities in people with COPD
Respiratory Physiology & Neurobiology ( IF 2.3 ) Pub Date : 2021-06-24 , DOI: 10.1016/j.resp.2021.103724
Danielle S R Vieira 1 , Liliane P S Mendes 2 , Maria Clara N Alencar 3 , Mariana Hoffman 2 , Andre L P Albuquerque 4 , Bruna M F Silveira 2 , Susana C Aguiar 5 , Verônica F Parreira 6
Affiliation  

Background

The relationship between rib cage (RC) motion abnormalities, dynamic hyperinflation (DH), and exercise capacity in people with COPD is controversial.

Aim

To investigate RC distortion and operational chest wall volumes during moderate and high constant-rate exercises in people with COPD.

Methods

Seven male participants [median(Q1-Q3) age: 63(60.0–66.0) years; FEV1: 39.0(38.0–63.0)% of predicted] performed a symptom-limited incremental exercise testing on cycle ergometer, followed by constant-rate tests (60 % and 80 % of peak work rate). Optoelectronic plethysmography was used to evaluate RC distortion: phase angle-PhAng, inspiratory phase ratio-PhRIB, expiratory phase ratio-PhREB; and chest wall volumes: end-inspiratory volume-Vei and end-expiratory volume-Vee.

Results

PhRIB and PhREB significantly increased during both constant-rate exercise tests, without difference between them. In general, Vei of the chest wall significantly increased in both exercise intensities while Vee did not change.

Conclusions

The occurrence of RC distortion seemed not to limit the exercise capacity in people with COPD evaluated, and it was present even in the absence of DH.



中文翻译:

慢性阻塞性肺病患者在两种运动强度下的肋骨变形和动态过度充气

背景

COPD 患者的胸腔 (RC) 运动异常、动态过度充气 (DH) 和运动能力之间的关系存在争议。

目标

研究 COPD 患者在中等和高速率恒速运动期间的 RC 变形和操作胸壁体积。

方法

七名男性参与者[中位(Q1-Q3)年龄:63(60.0-66.0)岁;FEV 1 : 39.0(38.0–63.0)% of predict] 在单车测力计上进行症状限制增量运动测试,然后进行恒定速率测试(峰值工作速率的 60% 和 80%)。采用光电体积描记法评估RC畸变:相位角-PhAng、吸气相位比-PhRIB、呼气相位比-PhREB;和胸壁容积:吸气末容积-Vei和呼气末容积-Vee。

结果

PhRIB 和 PhREB 在两种恒速运动测试中均显着增加,两者之间没有差异。一般而言,两种运动强度的胸壁 Vei 均显着增加,而 Vee 没有变化。

结论

RC 畸变的发生似乎不会限制评估的 COPD 患者的运动能力,即使在没有 DH 的情况下也存在。

更新日期:2021-07-02
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