颈动脉超声检测与经胸超声心动图测量心输出量的比较

Comparison between carotid ultrasound and transthoracic echocardiography measuring cardiac output

目的:通过对比颈动脉超声检测与经胸超声心动图检测心输出量,探究心输出量监测的最佳方式。方法:选择在我院重症监护病房(ICU)病房中98例患者作为研究对象,分别采用颈动脉超声与经胸超声心动图测定患者心输出量,对比两种检测方式测定的心输出量值,采用直线相关分析两种方法测定的总体以及不同临床特征心输出量间的相关性。结果:两种检测方法对于总体心输出量检测无显著差异(P>0.05);二者在不同性别、年龄分组、是否采用机械通气、不同临床适应证方面的心输出量检测,亦无显著差异(P均>0.05)。直线相关分析显示,两种检测方法在总体心输出量,不同性别、≤70岁、采用机械通气、神经疾病、采取外科手术时的心输出量检测呈中等相关(r=0.416～0.572,P<0.05或<0.01),在年龄>70岁患者心输出量检测呈高度相关(r=0.657,P=0.001)。结论:颈动脉超声检测与经胸超声心动图检测ICU患者的心输出量具有良好的相关性,二者可以相互替换。

Objective： To explore the optimal method to monitor cardiac output （CO） in ICU through comparing ca- rotid ultrasound and transthoracic eehocardiography （TTE） measuring CO. Methods： A total of 98 patients from our ICU were selected. Patients received carotid ultrasound and TTE to measure their CO respectively. CO measured by these two methods were compared. Linear correlation analysis was used to analyze the correlation among total CO and CO of different clinical features measured by two methods. Results： There was no significant difference in total CO measurement between two methods, P^O. 05. There were no significant difference in CO among different gen- ders, different age, mechanical ventilation or not and different clinical indications, P〉0.05 all. Linear correlation analysis show that two method was moderately correlated in measuring total CO, CO of different genders, ≤70 years, mechanical ventilation, neurological diseases and undergoing surgery （r = 0. 416- 0. 572, P=〈 0.05 or 〈0.01）, and highly correlated in measuring CO of patients 〉70 years （r = 0. 657, P = 0. 001）. Conclusion.. There are good correlation between carotid ultrasound and transthoracic echocardiography measuring cardiac output in ICU pa- tients. Either can replace the other one.