Impulse Oscillometry in Adults with Bronchiectasis

被引:32
作者
Guan, Wei-jie [1 ]
Gao, Yong-hua [2 ]
Xu, Gang [3 ]
Lin, Zhi-ya [1 ]
Tang, Yan [1 ]
Li, Hui-min [1 ]
Lin, Zhi-min [1 ]
Zheng, Jin-ping [1 ]
Chen, Rong-chang [1 ]
Zhong, Nan-shan [1 ]
机构
[1] Guangzhou Med Univ, Affiliated Hosp 1, Guangzhou Inst Resp Dis, State Key Lab Resp Dis,Natl Clin Res Ctr Resp Dis, 151 Yanjiang Rd, Guangzhou, Guangdong, Peoples R China
[2] Zhengzhou Univ, Affiliated Hosp 1, Dept Resp & Crit Care Med, Zhengzhou, Henan, Peoples R China
[3] Guangzhou First Peoples Hosp, Dept Geriatr, Guangzhou, Guangdong, Peoples R China
关键词
bronchiectasis; impulse oscillometry; bacteriology; acute exacerbation; convalescence;
D O I
10.1513/AnnalsATS.201406-280OC
中图分类号
R56 [呼吸系及胸部疾病];
学科分类号
摘要
Rationale: The usefulness of impulse oscillometry (IOS) in bronchiectasis has not been systematically investigated. Objectives: To determine the usefulness of IOS parameters and their correlation with radiology, disease severity, sputum bacteriology, and spirometry, and to compare the changes in LOS parameters during exacerbations and convalescence of bronchiectasis. Methods: We recruited 100 patients with bronchiectasis and 28 healthy subjects. Receiver operating characteristic curve was plotted to analyze the diagnostic performance of IOS parameters. Chest highresolution computed tomography (HRCT), Bronchiectasis Severity Index (BSI) assessment, sputum culture, and spirometry were performed. Correlation between IOS parameters and clinical indices was determined using the Spearman model. Changes in IOS parameters, compared with spirometry, during exacerbation were assessed in 16 patients with bronchiectasis. Measurements and Main Results: IOS parameters (in particular, resonant frequency) could discriminate patients with bronchiectasis from healthy subjects. Higher levels of IOS parameters were associated with Pseudomnnas aeruginosa infection, dyshomogeneity, higher BSI and HRCT score, more bronchiectatic lobes, and cystic bronchiectasis (all P < 0.05). All IOS parameters but lung resistance at 5 Hz were positively correlated with the duration of bronchiectasis symptoms, number of bronchiectatic lobes, I IRCT total scores, and BSI (all P < 0.05), but not sputum bacterial density (P > 0.05). IOS parameters, but not spirometric parameters, were not statistically different between peripheral and peripheral plus central segment bronchiectasis (all P > 0.05). Increased frequency dependence (higher resonance frequency or reactance area) was more likely to be associated with lower I IRCT scores (<= 5) than FEV1 . Compared with FEV1 , any single DS parameter being abnormal was more common in mild bronchiectasis, particularly in patients with IIRC. 'T score of 5 or lower. IOS parameters were not statistically different from baseline to exacerbations and convalescence (all P> 0.05). Conclusions: IOS parameters correlate with clinical indices and could reflect peripheral airway abnormality. An increased number of aberrant IOS parameters signals poorer clinical conditions. Increased frequency dependence might be a sensitive marker of mild bronchiectasis. Any single IOS parameter being abnormal sensitively reflects mild bronchiectasis. LOS parameters do not change significantly during bronchiectasis exacerbations.
引用
收藏
页码:657 / 665
页数:9
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