To investigate the relationship between TCM syndrome type and pulmonary function and CAT score in patients with chronic obstructive pulmonary disease (COPD) and provide a reference for clinical practice.

400 patients with stable obstructive pulmonary disease in outpatients and inpatients of our hospital were selected as the research object from September 2015 to September 2017. According to TCM syndromes of chronic obstructive pulmonary disease, all patients were evaluated for pulmonary function, COPD assessment test (CAT) and acute exacerbation risk assessment. The pulmonary function, CAT score and the risk of acute exacerbation in patients with different TCM syndromes were compared.

(1) The data showed that there were 105 cases of phlegm-damp lung type, 108 cases of phlegm-damp lung type, 97 cases of phlegm and blood stasis type, 90 cases of lung, kidney, qi and yin deficiency type. (2) The FEV₁/FVC and FEV1% Pred of phlegm and dampness obstructing lung, phlegm and phlegm lung, phlegm and blood stasis obstruction, lung and kidney Qi and Yin deficiency decreased in turn (P<0.05). Lung function grading showed that the type of phlegm damp lung to GOLD1 level, phlegm type lungs mainly GOLD2, phlegm and blood stasis type to GOLD3 level, lung and kidney qi and yin deficiency type to GOLD4 level. (3) The proportion of high-risk increased and low-risk decreased in turn in Phlegm blocking the lungs, phlegm and phlegm lungs, phlegm and blood stasis, lung and kidney qi and yin deficiency (P<0.05).

With the development of phlegm-damp lung type, phlegm phlegm type, phlegm-stasis lung type and lung-kidney-qi-yin deficiency type, lung function gradually decreases and CAT score increases in sequence.