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对37例自主呼吸和26例机械通气慢性阻塞性肺病患者作了二氧化碳通气当量(VECO_2)研究。 结果表明,27例动脉血二氧化碳分压(PaCO_2)正常的自主呼吸患者和26例机械通气患者的VECO_2与死腔/潮气量(VD/VT)相关性非常显著(r=0.8355和0.9563, P<0.01),10例高PaCO_2自主呼吸患者的VECO_2与VD/VT无明显相关(r=0.3543,P>0.05)。说明VECO_2不仅反映VD/VT的改变、还受呼吸中枢和呼吸器官机械障碍的影响。
Carbon dioxide ventilation equivalent (VECO_2) was studied in 37 patients with spontaneous breathing and 26 patients with COPD. The results showed that there was a significant correlation between VECO_2 and dead space / tidal volume (VD / VT) in 27 patients with spontaneous breathing with normal arterial partial pressure of carbon dioxide (PaCO_2) and 26 patients with mechanical ventilation (r = 0.8355 and 0.9563, P < 0.01). There was no significant correlation between VECO_2 and VD / VT in 10 patients with high PaCO_2 spontaneous breathing (r = 0.3543, P> 0.05). VECO_2 not only reflects the changes in VD / VT, but also by respiratory and respiratory organ mechanical disorders.