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一般听诊时,肺气肿的呼吸音均减弱,这可能是肺实质破坏造成的声音传导障碍或气流受限所致。为此,在控制气流流通的情况下,对正常人和肺气肿患者的肺音强度进行了研究。方法受试者正常人8例(男性,45～63岁,FEV_1为预计值的79%～126%,严重肺气肿患者9例(男性,50～70岁,FEV_1为预计值的14%～63%)。肺气肿是根据肺病史、肺功能检测结果和X 线照片进行诊断。全部受试者均在标准呼吸运动期间检查肺音图,预定的吸气(2个水平)和呼气流速分别为1L/s、2L/s 和1L/s,3s 为一个呼吸周期,检测每个周
Normal auscultation, emphysema, the breath sounds are weakened, which may be caused by the destruction of the sound of the lungs caused by sound conduction disorders or limited airflow. To this end, in the control of air flow in the case of normal and emphysematous lung sound intensity were studied. Methods Eight subjects with normal subjects (male, 45-63 years old, FEV 1 was 79% -126% of predicted, and 9 patients with severe emphysema (male, 50-70 years old, FEV 1 14% 63%). Emphysema was diagnosed on the basis of history of lung disease, pulmonary function tests and radiographs.All subjects underwent examinations of pulmonary tone, scheduled inspiratory (2 levels), and expiration during standard respiratory exercise Flow rates were 1L / s, 2L / s and 1L / s, 3s for one respiratory cycle, detecting each week