在健康人群中,动态膨胀发生在最大自愿通风过程中
Audrey Herpeux1, Nathalie Y Pauwen2, Roger Sergysels1
1Department of Pulmonology, Centre Hospitalier Universitaire Saint-Pierre, Brussels, Belgium.
Frontiers in medicine
|December 15, 2025
概括
动态高通胀 (DH) 在最大自愿通风 (MVV) 期间可能发生在健康个体中. 基线肺机械,而不是排气流量限制,可以预测在强烈呼吸期间对DH的易感性.
科学领域:
- 肺部生理学 肺部生理学
- 呼吸机械学 呼吸机械
- 心肺运动测试 心肺运动测试
背景情况:
- 动态高通胀 (DH) 通常在最大自愿通风 (MVV) 期间在阻塞性肺部疾病中观察到,通常归因于呼吸道流量限制.
- 在健康个体中,最大的努力通常不会诱导DH,这挑战了当前的生理学理解.
- 这项研究调查了MVP期间健康人群中DH的发生情况,质疑呼吸道流量限制的必要性.
研究的目的:
- 为了确定动态高通胀 (DH) 是否可以在健康个体的最大自愿通风 (MVV) 过程中发展而没有呼吸道流量限制.
- 挑战关于DH发生的生理条件的既定概念.
- 探索健康人群中DH发病的潜在预测因素.
主要方法:
- 四十三名健康受试者 (40-68岁) 在增加呼吸频率 (10-100次呼吸/分钟) 和最大潮体积的情况下进行了MVV.
- 启发能力 (IC) 在休息状态下测量,并在MVV期间定期测量,以检测DH.
- 在DH发作时的呼吸频率 (BF_DH) 被记录并通过随后的MVV证实.
主要成果:
- 动态膨胀 (DH) 在91%的健康人群中发生在100次呼吸/分钟或以下,平均发病频率为52次呼吸/分钟.
- 在DH发病与年龄,BMI,肺体积或流量之间没有发现显著的相关性.
- DH发病频率 (BF_DH) 与静止IC/FVC相反相关,表明较低的静止呼吸道水平预测了早期的DH发病.
结论:
- 动态高通胀 (DH) 在健康人群中在MVV期间可以表现为可变的低呼吸频率.
- 发病的DH似乎与休息的胸肺机械状态有关.
- 基线肺机械可能会影响在高强度呼吸任务期间对DH的易感性.
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