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-  2015 

探究峰流速仪呼气峰流速检测对慢性阻塞性肺疾病的筛查效力

DOI: doi:10.7507/1671-6205.2015062

Keywords: 慢性阻塞性肺疾病, 峰流速仪, 呼气峰流速, 筛查

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Abstract:

目的探讨峰流速仪呼气峰流速(PEF)检测对不同程度慢性阻塞性肺疾病(简称慢阻肺)人群筛查的敏感性。 方法选取2013年5月至2014年12月在北京协和医院呼吸内科门诊确诊的156例慢阻肺患者,采集患者病史、症状、危险因素暴露史、近1年急性加重次数和合并症等资料,并进行6分钟步行测试,测评慢阻肺评估测试(CAT)、改良英国医学研究委员会呼吸问卷(mMRC)和圣乔治呼吸问卷(SGRQ)。同时采用肺功能仪测量通气功能以及峰流速仪测量PEF。 结果以PEF占预计值百分比(PEF%pred)=80%为截断值,156例患者中筛查出120例(76.9%),36例被判定为漏诊人群。影响慢阻肺人群能否被峰流速仪筛查出的因素为FEV1%pred与SGRQ总分(P<0.01)。PEF筛查慢阻肺患者的整体敏感性为76.9%,对轻度气流受限患者的敏感性为27.7%,对中度气流受限患者的敏感性为68.5%,对重度~极重度气流受限患者的敏感性为98.5%,对中度~极重度气流受限患者的敏感性为83.3%;对CAT<10患者的敏感性为48.3%,对mMRC<2患者的敏感性为60.0%,对SGRQ<25患者的敏感性为30.0%;对CAT≥10患者的敏感性为87.5%,对mMRC≥2患者的敏感性为90.9%,对SGRQ≥25患者的敏感性为90.0%;对A级患者的敏感性为35.2%,对B级患者的敏感性为75.0%,对慢阻肺高危人群(C~D级)的敏感性为95.9%。以80%为截断值,峰流速筛查对早期慢阻肺患者(肺功能GOLD 1级、症状轻、慢阻肺综合评估A级)的敏感性较低;当截断值调整为95%时,峰流速筛查对早期慢阻肺的敏感性大幅度升高。 结论峰流速检测是慢阻肺良好的筛查方法。峰流速能否筛查出慢阻肺患者,取决于患者的肺功能(FEV1%pred)与症状严重程度(SGRQ)。峰流速筛查能早期发现慢阻肺患者,对气流受限程度重、急性加重风险高、需要药物治疗以缓解症状的患者尤为敏感

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