慢性咯痰是支气管扩张（简称支扩）的常见症状。文献报道，高分辨计算机断层摄影（HRCT）扫描诊断支扩的敏感性和特异性与支气管造影相似，在支扩的诊断中，HRCT扫描已经取代了支气管造影。作者对一组慢性咯痰病人进行前瞻性研究，以探索慢性咯痰病人的临床、实验室结果与HRCT Chronic phlegm is a common symptom of bronchiectasis (referred to as branch expansion). It has been reported in the literature that the sensitivity and specificity of HRCT scan for bronchiectasis are similar to those for bronchography. HRCT has replaced bronchography in the diagnosis of dilatation and dilation. The authors conducted a prospective study of a group of patients with chronic expectoration in order to explore the clinical and laboratory findings of patients with chronic expectoration of sputum