流速容量环测定在肺疾患诊断中的应用

Application of Flow Volume Loops in Diagnosis of Pulmonary Diseases

本文介绍6例不同肺部疾患患者的流速容量环测定。例1为正常图形;例2为1例慢支患者慢性阻塞性图形,呼气的下降曲线呈典型的勺形改变;例3为1例哮喘患者的可逆性气道阻塞图形,吸入舒喘灵前后呈现较大的变化;例4为1例长期吸烟者的小气道阻塞图形,患者的常规肺量计检查均在正常范围,然而流速容量环呼气曲线已显示出凹陷改变;例5为1例气管鳞癌的固定大气道阻塞图形,即梯形改变;例6为1例特发性肺纤维化患者的限制性流速容量环图形,即狭长的圆形。本文具体说明了特异的流速容量环测定在肺部疾病鉴别诊断中的价值。

Seven flow volume loops in patients with various pulmonary diseases were presen-ted.Case 1 showed a normal picture of flow volume loops.Case 2,a patient withchronic bronchitis,presented a typical and characteristic obstructive configuration.Case 3,a patient with asthma,resulted in a reversible obstructive picture with greatchange before and afrer inhalation of a bronchodilator.Case 4,a long term smoker,had a picture of small airway obstruction.Though his pulmonary functions obtainedwith spirometry were within normal range,his flow volume loop,however,had alre-ady resulted in early small airway obstruction.Case 5,a patient with squamous cellcarcinoma of the trachea,revealed a picturc of fixed large airway obstruction.Case 6,a patient with idiopathic pulmonary fibrosis,had a restrictive abnormality withlong narrow picture.The value of flow volume loops in the diagnosis of pulmonarydiseases was explained.