| Objective:Recently, the 6-minute walk test (6MWT) has been acknowledged as a study method of evaluating cardio respiratory function, motor ability and quality of life in all testes. Compared with the 6MWT and pulmonary function ventilation index, this study′s aim is to evaluate the value of 6MWT in patients with chronic obstructive pulmonary disease (COPD). METHODS:187 patients examined their pulmonary function in our hospital from June 2009 to December 2009. 84 patients were diagnosed with COPD, including 50 males and 34 females, with an average age of 64.60±7.32 years. 103 patients with other diseases were taken as controls, including 62 males and 41 females, with an average age of 62.48±9.30 years. Two groups were compared with pulmonary function ventilation index, dyspnea scale, the 6-minute walk distance (6MWD) and the depression fraction of blood oxygen. RESULTS:①In COPD group, the 6MWD was 351.40±77.19 meter, the depression fraction of blood oxygen saturation was 10.73±4.01 %, and dyspnea scale was 1.42±1.13, while the value was 429.48±61.98 meter, 4.66±1.95 % and 0.39±0.49 in control group. Compared with COPD group, the difference was significantly (P < 0.05).②The 6MWD had positive correlation with forced expiratory volume in one second (FEV1) and forced expiratory volume in one second/forced vital capacity (FEV1/FVC) (r was 0.62 and 0.56 separately, P < 0.05). The 6MWD had negative correlation with dyspnea scale (r was -0.63, P < 0.05).③The depression fraction of blood oxygen had negative correlation with FEV1 and FEV1/FVC (r was -0.65 and -0.71 separately, P < 0.05). The depression fraction of blood oxygen had positive correlation with dyspnea scale (r was 0.72, P < 0.05). CONCLUSION: There is a good correlation of 6MWT with forced expiratory volume in one second and forced expiratory volume in one second/forced vital capacity. The 6MWT that is easy and convenient is an effective method for detecting changes of lung function in COPD patients.
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