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在COPD患者的临床和实验中,常见到呼气流速受限程度相似的情况下,动脉血二氧化碳分压(PaCO_2)相差较多。其原因可能在于单纯分析呼气相不能正确估价COPD的严重程度。故对25例稳定期COPD患者分别测定PaCO_2、肺总量(TLC)、残气量(RV)、功能残气量(FRC),一分钟最大通气量(MVV)、最大呼气流速(PEF)、用力呼气1秒率(FEV_1)、最大用力呼气等容流速(V_(75),V_(50),V(25))、最大用力吸气流速(PIF)、用力吸气肺活量(IVC)、最大用力吸气胸腔内压(PIeI)、反应气道阻力大小的特殊气道传导比(SGaw),并分别测定吸气相与呼气相SGaw。
In COPD patients with clinical and experimental common to the extent of the expiratory flow rate is similar to the case, the arterial partial pressure of carbon dioxide (PaCO_2) are more different. The reason may be that simply analyzing the expiratory phase can not properly assess the severity of COPD. Therefore, 25 patients with stable COPD were measured PaCO_2, total lung volume (TLC), residual capacity (RV), functional residual capacity (FRC), one minute maximum ventilation (MVV), maximum expiratory flow (PEF) (FEV_1), maximum forced expiratory volume (V_ (75), V_ (50), V (25)), maximum forced inspiratory flow (PIF), forced aspirated vital capacity The maximal forced inspiratory pressure (PIeI) and specific airway conduction ratio (SGaw) for response to airway resistance were measured and the inspiratory phase and expiratory phase SGaw were measured.