摘要
本文对比观察21例神经外科病人50～60% N_2O-O_2-安(异)氟醚麻醉期间呼气末二氧化碳分压(P_(ET)CO_2)和动脉血二氧化碳分压(PaCO_2)的变化。结果表明麻醉前自主呼吸时或术毕自主呼吸恢复后 PaCO2 和 P_(ET)CO_2 的相关性明显高于麻醉期间间歇正压通气时,潮气量对Pa_(-ET)CO_2 有一定的影响。结论:自主呼吸时 P_(ET)CO_2 能较正确地反映 PaCO_2;全麻控制呼吸期间以 P_(ET)CO_2 估测 PaCO_2 的准确性下降;采用 P_(ET)CO_2 和潮气量多元估测 PaCO_2 可提高准确度。
The peak expiratory carbon dioxide pressure(P_(ET)CO_2)and arterial carbon dio-xide partial pressure(PaCO_2)were measured and compared in 21 neurosurgical pa-tients anesthetized with 50-60% N_2O-O_2-enflurane(or isoflurane).The results showedthat the interrelationship between P_(ET)CO_2 and PaCO_2 was closer during spontaneousrespiration(SR),r=0.87,than intermittent positive pressure ventilation(IPPV),r=0.56,and the tidal volume(TV)affected the difference between P_(ET)CO_2 andPaCO_2.It was concluded that P_(ET)CO_2 might provide a precise estimation of PaCO_2during SR,but the accuracy of PaCO_2 calculated from P_(ET)CO_2 decreased during IPPV,and that PaCO_2 estimated from both P_(ET)CO_2 and TV might be more reliableeither during IPPV or during SR.
出处
《天津医药》
CAS
1991年第7期409-411,共3页
Tianjin Medical Journal
