Domiciliary pulse-oximetry at exacerbation of chronic obstructive pulmonary disease: prospective pilot study.

Domiciliary pulse-oximetry at exacerbation of chronic obstructive pulmonary disease: prospective pilot study.
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DOI:
10.1186/1471-2466-10-52
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发表时间:
2010-10-20
影响因子:
3.1
通讯作者:
Wedzicha JA
Wedzicha JA
中科院分区:
医学3区
文献类型:
--
作者:
Hurst JR;Donaldson GC;Quint JK;Goldring JJ;Patel AR;Wedzicha JA

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客观区分慢性阻塞性肺病(COPD)恶化与日常症状变化的能力将是临床实践和研究的重要发展。我们评估了家庭脉搏血氧仪实现这一目标的能力。 40 名中重度 COPD 患者在 2705 天内每天收集症状、心率 (HR)、血氧饱和度 (SpO2) 和呼气峰流量 (PEF) 变化数据。 31 名患者的数据适合基线分析,13 名患者出现病情加重。数据表示为每位患者稳定时观察到的标准差 (SD) 的倍数。在稳定期 COPD 中,HR、SpO2 和 PEF 的 SD 分别约为 5 min-1、1% 和 10l min-1。在症状恶化之前,所有三个变量均出现可检测到的变化,在症状出现后 2-3 天变化最大。综合血氧饱和度评分(SpO2 下降和 HR 上升的平均幅度)可区分恶化发作和症状变异(接受者操作特征曲线下面积,AUC = 0.832,95%CI 0.735-0.929,p = 0.003)。在存在症状的情况下,评分变化≥1(心率和 SpO2 变化≥1SD 的平均值)对于恶化发作的敏感性为 71%,特异性为 74%。我们在一小部分慢性阻塞性肺病患者样本中定义了脉搏血氧饱和度变量的正常变化。复合 HR 和 SpO2 评分可区分恶化发作和症状变化,可能有助于及时治疗并在临床试验中验证此类事件。
The ability to objectively differentiate exacerbations of chronic obstructive pulmonary disease (COPD) from day-to-day symptom variations would be an important development in clinical practice and research. We assessed the ability of domiciliary pulse oximetry to achieve this. 40 patients with moderate-severe COPD collected daily data on changes in symptoms, heart-rate (HR), oxygen saturation (SpO2) and peak-expiratory flow (PEF) over a total of 2705 days. 31 patients had data suitable for baseline analysis, and 13 patients experienced an exacerbation. Data were expressed as multiples of the standard deviation (SD) observed from each patient when stable. In stable COPD, the SD for HR, SpO2 and PEF were approximately 5 min-1, 1% and 10l min-1. There were detectable changes in all three variables just prior to exacerbation onset, greatest 2-3 days following symptom onset. A composite Oximetry Score (mean magnitude of SpO2 fall and HR rise) distinguished exacerbation onset from symptom variation (area under receiver-operating characteristic curve, AUC = 0.832, 95%CI 0.735-0.929, p = 0.003). In the presence of symptoms, a change in Score of ≥1 (average of ≥1SD change in both HR and SpO2) was 71% sensitive and 74% specific for exacerbation onset. We have defined normal variation of pulse oximetry variables in a small sample of patients with COPD. A composite HR and SpO2 score distinguished exacerbation onset from symptom variation, potentially facilitating prompt therapy and providing validation of such events in clinical trials.
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