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目的 为连续无创监测危重和全麻小儿心排出量。方法 采用经气管超声多谱勒（ Ｔ Ｔ Ｄ）及该监测仪的体表超声法（ Ｓ Ｐ） 对２０ 例气管插管的危重患儿和全麻手术患儿进行心输出量（ Ｃ Ｏ） 和心脏指数（ Ｃ Ｉ） 监测。结果 Ｔ Ｔ Ｄ 和 Ｓ Ｐ 两种方法比较相关良好，所测的数据较为稳定，重复性好。结论 Ｔ Ｔ Ｄ 法可用于小儿床旁 Ｃ Ｏ 和 Ｃ Ｉ 的监测。
The purpose of continuous non-invasive monitoring of critically ill and general anesthesia in children with cardiac output. Methods Twenty tracheo-intubated children under general anesthesia and general anesthesia were enrolled in this study. Cardiac output (C O) was measured by tracheal ultrasonography (T D) and surface ultrasonography (S P) And cardiac index (C I) monitoring. Results T T D and S P two methods are relatively good correlation, the measured data is more stable, good repeatability. Conclusion T T D method can be used for the monitoring of C O and C I in pediatric patients.