背景慢性阻塞性肺疾病(COPD)患者常存在包括膈肌在内的全身骨骼肌营养不良和萎缩.膈肌疲劳是此类患者病情进展的重要病理生理机制之一,但应用超声联合肺功能评估膈肌功能却鲜见报道.目的分析不同程度COPD患者膈肌移动度情况,及其与肺功能水平的相关性.方法:2014年3月—2019年1月采用便利抽样法选择我院就诊的COPD患者81例作为研究对象(COPD组),按COPD分级标准分为轻、中、重度三组,另选取我院肺功能室做检查的健康体检者30例作为对照组,分别行肺功能检查、超声测量平静呼吸时相膈肌移动度(FRC)及“,”background patients with chronic obstructive pulmonary disease (COPD) often have systemic skeletal muscle dystrophy and atrophy, including diaphragm. Diaphragmatic fatigue is one of the important pathophysiological mechanisms of disease progression in such patients, but the application of ultrasound combined with pulmonary function to evaluate diaphragmatic function is rarely reported. Objective to analyze the diaphragmatic mobility and its correlation with pulmonary function in patients with different degrees of COPD. Methods: from March 2014 to January 2019, 81 patients with COPD treated in our hospital were selected as the research object (COPD group) by convenient sampling method. They were divided into light, medium and severe groups according to the COPD classification standard. In addition, 30 healthy subjects examined in the pulmonary function room of our hospital were selected as the control group. Pulmonary function examination and ultrasound were performed to measure diaphragmatic movement (FRC) during calm breathing The modified British Medical Research Society Dyspnea Scale (MMRC) was used to evaluate dyspnea.