FEV的优点1 在支气管挑战测试期间预测的百分比变化
James Dean1,2, Augusta Beech3,4, Dave Singh3,4
1Division of Immunology, Immunity to infection and Respiratory Medicine, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester and Manchester University NHS Foundation Trust, Manchester, UK. jdean@meu.org.uk.
预测FEV1下降15%是一种更有效和更安全的支气管挑战测试方法,而不是标准的20%绝对下降. 这种方法减少了患者的变化和依赖基线肺功能.
科学领域:
- 肺部医学 肺部医学
- 呼吸系统生理学 呼吸系统生理学
- 临床诊断 临床诊断 临床诊断
背景情况:
- 甲胆挑战测试传统上使用强迫呼气体积在一秒内 (FEV1) 从基线下降20%.
- 较高的基线FEV1需要更大的绝对体积变化才能达到20%的下降值.
- 这可以引入可变性和依赖于测试前的肺功能测量.
研究的目的:
- 为了评估使用FEV1预测下降的百分比用于支气管挑战测试的实用性.
- 要确定15%的预测下降 (PD15%) 是否比标准的20%绝对下降 (PD20) 更可靠,更有效的替代方案.
主要方法:
- 重新分析了来自114名喘患者的甲胆挑战数据.
- 标准PD20标准与新的PD15%标准进行比较,以对支气管过敏反应进行分类.
主要成果:
- 在PD20和PD15%之间发现了强烈的一致性 (r=0.95,ICC=0.97).
- PD20值明显高于PD15%值,PD20的FEV1下降幅度更大 (21.4%与19.1%相比).
- 与PD20相比,PD15%方法对基线FEV1的依赖性较小,并且在访问之间FEV1的变化影响较小.
结论:
- 对于支气管挑战测试,建议基于FEV1预测变化15%的PD标准.
- 这种方法通过减少基线空气流阻塞的影响,提高了效率和安全性.
- 百分之15的PD方法提供了一个更标准化的气道超响应度的测量方法.
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