TY - T1的揭露劳力性呼吸困难的机制结合肺纤维化和肺气肿JF -欧洲呼吸杂志》乔和J - 10.1183/13993003.01319 -2019欧元六世- 55 - 1 SP - 1901319 AU -科斯塔,卡米拉·m·内德盟——J·阿尔贝托AU -谢谢你,卡洛斯·g . AU - Paula-Ribeiro玛塞尔AU -拉莫斯Roberta AU - Ferreira, Eloara M. AU - Nery, Luiz E. AU - O'Donnell, Denis E. AU - Pereira, Carlos A.C. AU - Ota-Arakaki,Jaquelina Y1 - 2020/01/01 UR - //www.qdcxjkg.com/content/55/1/1901319.abstract N2 -目前流行的观点是,特发性肺纤维化(IPF)和肺气肿(CPFE)合并患者的劳累性呼吸困难在很大程度上可以由严重低氧血症解释。然而,几乎没有证据支持这些假设。我们前瞻性地对比了42例CPFE患者和16例IPF患者运动时的感觉和生理反应,这些患者与劳累性低氧血症的严重程度相匹配。肺气肿和肺纤维化用计算机断层摄影术量化。在恒定的工作速率测试中评估吸气限制:在一组患者中获得毛细血管血气。与IPF相比,CPFE患者的运动能力较低,但广泛纤维化程度较低(p=0.004和0.02)。运动性呼吸困难是24例CPFE患者的主要限制症状,与呼吸困难较少的患者相比,转移因子、动脉二氧化碳张力和通气效率(较高的分钟通气(V 'E)/二氧化碳输出(V 'CO2)比)显著降低。然而,超声心动图显示肺动脉高压的可能性组间无差异(p=0.44)。高死腔/潮气量比、低毛细血管二氧化碳张力性肺气肿严重程度(包括混合性肺气肿)和牵拉性支气管扩张与呼吸困难组较高的V 'E /V 'CO2比有关。 V′E/V′CO2 nadir >50 (OR 9.43, 95% CI 5.28–13.6; p=0.0001) and total emphysema extent >15% (2.25, 1.28–3.54; p=0.01) predicted a high dyspnoea burden associated with severely reduced exercise capacity in CPFEContrary to current understanding, hypoxaemia per se is not the main determinant of exertional dyspnoea in CPFE. Poor ventilatory efficiency due to increased “wasted” ventilation in emphysematous areas and hyperventilation holds a key mechanistic role that deserves therapeutic attention.Exertional dyspnoea is related to poor ventilatory efficiency rather than hypoxaemia or inspiratory constraints in CPFE. Lessening patients' excessive ventilation might prove particularly beneficial to mitigate the burden of this disabling symptom. http://bit.ly/2MRn6az ER -