目的探讨气流受限不完全可逆的慢性阻塞性肺疾病(COPD)在支气管舒张试验前后容量和流速变化与肺通气功能障碍严重程度的关系,并对COPD肺通气功能障碍严重程度分级的依据进行初步探索。方法收集2012年1月至2015年6月在中国医科大学附属...目的探讨气流受限不完全可逆的慢性阻塞性肺疾病(COPD)在支气管舒张试验前后容量和流速变化与肺通气功能障碍严重程度的关系,并对COPD肺通气功能障碍严重程度分级的依据进行初步探索。方法收集2012年1月至2015年6月在中国医科大学附属盛京医院肺功能室登记的COPD患者447例,其中男254例,女193例,平均年龄(65±12)岁。气流受限不完全可逆定义为支气管舒张试验前后FEV1差值<200 m L或FEV1改善率<12%,尽量排除气道高反应性对本研究的影响。结果随着COPD肺通气功能障碍严重程度的增加,FEV1改变值逐渐变小,FVC改变率越来越大,FEV1改变率和FVC改变值没有呈现出具有统计学意义的规律变化。结论气流受限不完全可逆患者肺通气功能障碍严重程度越高,气流受限越来越不可逆;FEV1改变值可以作为评估COPD患者肺通气功能障碍严重程度分级是否合理的依据,分为3组可能是合理的。展开更多
Background Chronic obstructive pulmonary disease （COPD） has a variable natural history and not all individuals follow the same course. This study aimed to identify the prevalence and characteristics of asymptomatic ...Background Chronic obstructive pulmonary disease （COPD） has a variable natural history and not all individuals follow the same course. This study aimed to identify the prevalence and characteristics of asymptomatic COPD patients from a population-based survey in China.Methods A multistage cluster sampling strategy was used in a population from seven different provinces/cities. All residents （over 40 years old） were interviewed with a standardized questionnaire and spirometry.Post-bronchodilator forced expiratory volume in 1 second （FEV1）/forced vital capacity （FVC） of less than 70% was defined as the diagnostic criterion of COPD. All COPD patients screened were divided into symptomatic group and asymptomatic group according to the presence or absence of chronic respiratory symptoms. Socio-demographic,personal and exposure variables were collected and analyzed.Results Among the 1668 patients who were diagnosed with COPD from the 25 627 sampling subjects, 589 （35.3%）were asymptomatic. The age, sex, body mass index （BMI）,rural and urban distributions, smoking habit and education levels were similar in the two groups. A total of 64.7% of the asymptomatic patients had no comorbidities. Cardiovascular diseases and lung cancer were more common among symptomatic COPD patients than asymptomatic group.Asymptomatic COPD group were less likely to present with poor ventilation in the kitchen, a family history of respiratory disease and recurrent childhood cough. Asymptomatic COPD patients had significantly higher FEV1 （73.1% vs. 61.0%）, FVC （91.9% vs. 82.0%）, and a higher ratio of FEV1/FVC （62.9% vs.58.7%） （all P 〈0.001） than symptomatic group. More asymptomatic patients were underdiagnosed （91.9% vs.54.3%, P〈0.001） than symptomatic patients.Conclusions This large population-based survey confirmed a high prevalence of asymptomatic COPD patients in China. More use of spirometry screening test may be important to the early detection of COPD.展开更多
Background The respiratory system changes with age and a better understanding of the changes contribute to detect and prevent respiratory dysfunctions in old population. The purpose of this study was to observe age-as...Background The respiratory system changes with age and a better understanding of the changes contribute to detect and prevent respiratory dysfunctions in old population. The purpose of this study was to observe age-associated changes of pulmonary function parameters in healthy young adults and the elderly. Methods A cross-sectional study was conducted among 600 male and female subjects aged 19 to 92 years. The subjects were divided into three groups by age： young adult （19-39 years）, middle-aged adult （40-59 years）, and the elderly （〉60 years）. The pulmonary function was measured with routine examination methods and 13 parameters including vital capacity （VC）, residual volume （RV）, functional residual capacity （FRC）, total lung capacity （TLC）, RV/TLC, forced vital capacity （FVC）, forced expiratory volume in one second （FEV1）, FEV1/FVC, peak expiratory flow （PEF）, forced expiratory flow at 25% of FVC exhaled （FEF25）, forced expiratory flow at 50% of FVC exhaled （FEF50）, diffusion capacity of the lung for carbon monoxide （DLCO）, and specific diffusion capacity of CO （KCO） were collected and analyzed. Changes in pulmonary function parameters among the influence on FEVJFVC and RV were studied further. Results Ten pulmonary function parameters including VC, FVC, pre-elderly and elderly subjects, especially the aging FEV1, FEV1/FVC, PEF, FEF25, FEF50, TLC, DLCO and KCO decreased significantly with age in both male and female subjects （P 〈0.01）. RV and RV/TLC were increased with age （P 〈0.01）. FRC remained stable during aging. Except FRC, the linear relationship was significant between age and other pulmonary function parameters. In the pre-elderly and elderly subjects, RV had a non-significantly increasing tendency with age （P 〉0.05）, and FEV1/FVC did not change significantly with age （P 〉0.05）. Conclusion Total pulmonary function was declined tendency of RV and decreasing tendency of FEV1/FVC with advancing age, but FRC was stable, and展开更多
文摘目的探讨气流受限不完全可逆的慢性阻塞性肺疾病(COPD)在支气管舒张试验前后容量和流速变化与肺通气功能障碍严重程度的关系,并对COPD肺通气功能障碍严重程度分级的依据进行初步探索。方法收集2012年1月至2015年6月在中国医科大学附属盛京医院肺功能室登记的COPD患者447例,其中男254例,女193例,平均年龄(65±12)岁。气流受限不完全可逆定义为支气管舒张试验前后FEV1差值<200 m L或FEV1改善率<12%,尽量排除气道高反应性对本研究的影响。结果随着COPD肺通气功能障碍严重程度的增加,FEV1改变值逐渐变小,FVC改变率越来越大,FEV1改变率和FVC改变值没有呈现出具有统计学意义的规律变化。结论气流受限不完全可逆患者肺通气功能障碍严重程度越高,气流受限越来越不可逆;FEV1改变值可以作为评估COPD患者肺通气功能障碍严重程度分级是否合理的依据,分为3组可能是合理的。
文摘Background Chronic obstructive pulmonary disease （COPD） has a variable natural history and not all individuals follow the same course. This study aimed to identify the prevalence and characteristics of asymptomatic COPD patients from a population-based survey in China.Methods A multistage cluster sampling strategy was used in a population from seven different provinces/cities. All residents （over 40 years old） were interviewed with a standardized questionnaire and spirometry.Post-bronchodilator forced expiratory volume in 1 second （FEV1）/forced vital capacity （FVC） of less than 70% was defined as the diagnostic criterion of COPD. All COPD patients screened were divided into symptomatic group and asymptomatic group according to the presence or absence of chronic respiratory symptoms. Socio-demographic,personal and exposure variables were collected and analyzed.Results Among the 1668 patients who were diagnosed with COPD from the 25 627 sampling subjects, 589 （35.3%）were asymptomatic. The age, sex, body mass index （BMI）,rural and urban distributions, smoking habit and education levels were similar in the two groups. A total of 64.7% of the asymptomatic patients had no comorbidities. Cardiovascular diseases and lung cancer were more common among symptomatic COPD patients than asymptomatic group.Asymptomatic COPD group were less likely to present with poor ventilation in the kitchen, a family history of respiratory disease and recurrent childhood cough. Asymptomatic COPD patients had significantly higher FEV1 （73.1% vs. 61.0%）, FVC （91.9% vs. 82.0%）, and a higher ratio of FEV1/FVC （62.9% vs.58.7%） （all P 〈0.001） than symptomatic group. More asymptomatic patients were underdiagnosed （91.9% vs.54.3%, P〈0.001） than symptomatic patients.Conclusions This large population-based survey confirmed a high prevalence of asymptomatic COPD patients in China. More use of spirometry screening test may be important to the early detection of COPD.
文摘Background The respiratory system changes with age and a better understanding of the changes contribute to detect and prevent respiratory dysfunctions in old population. The purpose of this study was to observe age-associated changes of pulmonary function parameters in healthy young adults and the elderly. Methods A cross-sectional study was conducted among 600 male and female subjects aged 19 to 92 years. The subjects were divided into three groups by age： young adult （19-39 years）, middle-aged adult （40-59 years）, and the elderly （〉60 years）. The pulmonary function was measured with routine examination methods and 13 parameters including vital capacity （VC）, residual volume （RV）, functional residual capacity （FRC）, total lung capacity （TLC）, RV/TLC, forced vital capacity （FVC）, forced expiratory volume in one second （FEV1）, FEV1/FVC, peak expiratory flow （PEF）, forced expiratory flow at 25% of FVC exhaled （FEF25）, forced expiratory flow at 50% of FVC exhaled （FEF50）, diffusion capacity of the lung for carbon monoxide （DLCO）, and specific diffusion capacity of CO （KCO） were collected and analyzed. Changes in pulmonary function parameters among the influence on FEVJFVC and RV were studied further. Results Ten pulmonary function parameters including VC, FVC, pre-elderly and elderly subjects, especially the aging FEV1, FEV1/FVC, PEF, FEF25, FEF50, TLC, DLCO and KCO decreased significantly with age in both male and female subjects （P 〈0.01）. RV and RV/TLC were increased with age （P 〈0.01）. FRC remained stable during aging. Except FRC, the linear relationship was significant between age and other pulmonary function parameters. In the pre-elderly and elderly subjects, RV had a non-significantly increasing tendency with age （P 〉0.05）, and FEV1/FVC did not change significantly with age （P 〉0.05）. Conclusion Total pulmonary function was declined tendency of RV and decreasing tendency of FEV1/FVC with advancing age, but FRC was stable, and
