在患有纤维化间歇性肺病和严重损伤的DLCO的患者中,运动不耐受性的系统性决定因素
Reginald M Smyth1, Matthew D James1, Sandra G Vincent1
1Respiratory Investigation Unit, Division of Respirology, Department of Medicine, Queen's University and Kingston Health Sciences Centre, Kingston General Hospital, Kingston, Ontario, Canada.
在纤维化间歇性肺病 (ILD) 中,一氧化碳 (DLCO) 的扩散能力严重降低表明多次运动限制. 这一DLCO<40%的发现有助于识别可能受益于向治疗的ILD患者.
科学领域:
- 肺部医学 肺部医学
- 运动生理学 运动生理学
- 心肺功能 心肺功能
背景情况:
- 运动不耐受性在纤维化间歇性肺部疾病 (ILD) 中很常见.
- 对一氧化碳扩散能力的严重损害 (DLCO<40%) 与不良的运动耐受性有关,但潜在的机制尚不清楚.
- DLCO可能反映了运动期间O2转移之外的更广泛的生理障碍.
研究的目的:
- 调查导致纤维性ILD患者运动限制的生理机制,DLCO<40%.
- 为了确定严重降低的DLCO是否与特定的运动异常和症状有关.
主要方法:
- 67名纤维性ILD患者 (24名D<40%的LCO) 和22名对照患者接受了肺功能测试和渐进性心肺运动测试.
- 测量包括肺体积,博格呼吸障碍,腿部不适得分,O2脉冲,乳酸值,通风和氧和 (SPO2).
主要成果:
- 与对照组和那些DLCO><40%的患者相比,DLCO<40%的患者表现出较低的肺功能,较低的峰值工作率和较早的无氧值.
- 这一组还表现出高通风率,较低的SpO2,以及在较低的运动强度下具有关键的呼吸限制,与更高的呼吸障碍和腿部不适相关.
- 当与呼吸和吸气储备能力不平衡相关时,呼吸障碍的差异减少了.
结论:
- 纤维性ILD的DLCO<40%表示相互关联的问题,包括心血管功能障碍,早期无氧代谢,过度通风,呼吸限制和低氧化.
- 这些障碍有助于在运动期间限制呼吸道和外周症状.
- DLCO<40%可以作为临床标志物来识别纤维性ILD患者,这些患者可能会从针对这些系统异常的干预中受益.
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