运动激发试验:FEV1下降15%是否足够支持哮喘的诊断
2011/08/31
摘要
前言:在运动激发试验(ECT)中,第一秒用力呼气量(FEV1)下降10%~15%是用于诊断运动诱发性支气管痉挛的一个决定性因素。
假设:采用FEV1联合25%~75%的用力肺活量的平均用力呼气流量(FEF25~75%)能增加哮喘患儿ECT的敏感性。
目的:比较哮喘患儿和健康对照者FEV1和FEF25~75%的变化。
方法:本试验为横断面研究。哮喘患者根据GINA标准进行分类。在未进行控制治疗1月后,采用标准程序进行ECT。在所有受试者中对有关鼻炎和哮喘进行问卷调查。采用ROC曲线进行分析。
结果:共计147名儿童(34名健康儿童和113名哮喘患者,分别有18名和58名男性)入选本研究。这些受试者分为健康儿童、间歇性哮喘患者、轻症哮喘患者和中度持续性哮喘患者。各组间具有相似的平均年龄(分别为9.4、9.48、8.97和11.2岁)。采用FEV1下降15%作为标准,获得29%的敏感性和100%的特异性。然而,如果采用FEV1下降10%作为标准,敏感性和特异性分别为47%和97%。如另外增加FEF25~75%下降28%作为标准,敏感性为52%,特异性为94%。
结论:我们的研究显示,采用较低的FEV1截止值(10%)联合FEF25~75%下降28%作为标准,能增加ECT的敏感性。
(苏楠 审校)
J Asthma. 2011 Jul 13. [Epub ahead of print]
Exercise Challenge Test: Is a 15% Fall in FEV(1) Sufficient for Diagnosis?
Fuentes C, Contreras S, Padilla O, Castro-Rodriguez JA, Moya A, Caussade S.
Source
Pediatric Division, Respiratory Section, Pontificia Universidad Cat?lica de Chile , Santiago , Chile.
Abstract
INTRODUCTION:In the exercise challenge test (ECT), a drop in forced expiratory volume in the first second (FEV(1)) of between 10 and 15% is the determinant variable for a diagnosis of exercise-induced bronchospasm.
HYPOTHESIS:The use of FEV(1) plus mean forced expiratory flow between 25% and 75% of the forced vital capacity (FEF(25~75%)) may increase the sensitivity of the ECT in asthmatic children.
SPECIFIC OBJECTIVE:To compare FEV(1) and FEF(25~75%) changes in a group of asthmatic and healthy children.
METHODOLOGY:This was a cross-sectional study. Asthmatics were categorized by their severity (GINA) and after 1 month without controller therapy, an ECT was done under standard protocol. As well, a questionnaire about rhinitis and asthma was conducted with the entire population. ROC curves were used for analysis.
RESULTS:A total of 147 children (34 healthy and 113 asthmatics, 18 and 58 males, respectively) were evaluated. Divided into healthy children and intermittent, mild and moderate persistent asthmatics, they had similar average ages (9.4, 9.48, 8.97, and 11.2 years, respectively). Using a 15% fall in FEV(1), we obtained 29% sensitivity and 100% specificity. However, when we used a 10% fall in FEV(1), sensitivity was 47% and specificity was 97%. Adding a 28% fall in FEF(25~75%), sensitivity was 52% and specificity was 94%.
CONCLUSION:This study suggests that test sensitivity can increase by using a lower FEV(1) cut-off (10%) and adding a 28% fall in FEF(25~75%).
J Asthma. 2011 Jul 13. [Epub ahead of print]
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对呼吸困难的感知、哮喘控制的评价及哮喘患者生活质量在性别上的差异
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哮喘患者的反复高剂量过敏原吸入激发试验