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采用经气管超声多普勒心输出量监测（ＴＴＤ）的体表超声法（ＳＰ），对３０例循环稳定的小婴儿进行心输出量（ＣＯ）监测，同时用彩色超声多普勒进行对照测定，并对两种方法所测的１２０对数据进行相关性分析。结果ＳＰ法与彩色超声多普勒测定ＣＯ相关良好（ρ＝０．９０），呈正相关，两法测ＣＯ的平均误差Ｂｉａｓ＝０．１８±０．０９，表明ＳＰ法测定ＣＯ可反映小婴儿心输出量的变化。本法无创，无需气管插管，仪器可移至床旁使用，可用于危重病儿尤其是对小婴儿进行连续心功能监测、病情分析和指导治疗
Thirty patients with circulatory stabilization were monitored for cardiac output (CO) by transluminal ultrasonic doppler output monitoring (TTD) by surface ultrasonography (SP), and color Doppler ultrasound was used for control , And analyzed the correlation between the 120 pairs of data measured by the two methods. Results The correlation between SP and color Doppler echocardiography was good (ρ = 0.90). There was a positive correlation between CO and SP in the two methods. Bias = 0.18 ± 0.09. Changes in cardiac output. This method is noninvasive, does not require endotracheal intubation, the instrument can be moved to the bedside, can be used for critically ill children, especially for small infants continuous heart function monitoring, disease analysis and guidance treatment