Determination of cardiac output by transcutaneous continuous-wave ultrasonic Doppler computer.
Determination of cardiac output by transcutaneous continuous-wave ultrasonic Doppler computer.
复制标题
通过经皮连续波超声多普勒计算机测定心输出量。
DOI：
10.1016/0002-9149(84)90718-5
复制
发表时间：
1984
期刊：
影响因子：
--
通讯作者：
Rahimtoola,SH
中科院分区：
文献类型：
--
作者：
Chandraratna,PA;Nanna,M;McKay,C;Nimalasuriya,A;Swinney,R;Elkayam,U;Rahimtoola,SH
为了评估一种新型便携式连续波多普勒计算机（Ultracom）测量心输出量（CO）的准确性，对39例患者进行了三次同时热稀释CO和多普勒CO测量。36例患者获得了技术上足够的多普勒CO检查。超声心动图测量主动脉根直径，计算横截面积。连续波多普勒换能器放置在胸骨上切迹处，指向升主动脉并成一定角度，直到获得最大速度信号。利用快速傅里叶变换技术计算了心脏收缩速度积分。多普勒CO计算公式为：CO =主动脉横截面积×收缩速度积分×心率。还进行了观察者之间和观察者内部的变异性研究。热稀释法测得的CO值为1.86 ~ 10.1升/分钟（平均5.26±1.91[±标准差]），多普勒法测得的CO值为1.63 ~ 10.9升/分钟（平均5.32±1.83）。相关系数为0.97 (p < 0.001)，估计的标准误差为0.42。回归方程显示多普勒CO = 0.408 + 0.93 ×热稀释CO， 29名志愿者观察者间变异性的相关系数为0.98 (p < 0.001)， 18名志愿者观察者内变异性的相关系数为0.97 （p < 0.001）。因此，在许多患者中，经过训练和经验丰富的人员可以使用这种多普勒技术准确地确定CO；观察者内部和观察者之间的可变性很小。
To evaluate the accuracy of a new, portable, continuous-wave Doppler computer (Ultracom) in measuring cardiac output (CO), simultaneous thermodilution CO and Doppler CO were measured in triplicate in 39 selected patients. Technically adequate Doppler CO studies were obtained in 36 patients. Aortic root diameter was measured by echocardiography and the cross-sectional area was calculated. A continuous-wave Doppler transducer was placed in the suprasternal notch, directed toward the ascending aorta and angled until the maximal velocity signal was achieved. The systolic velocity integral was computed using fast Fourier transform technique. The Doppler CO was computed from the equation: CO = aortic cross-sectional area × systolic velocity integral × heart rate. Interobserver and intraobserver variability studies were also performed. CO measured by thermodilution ranged from 1.86 to 10.1 liters/min (mean 5.26 ±1.91 [± standard deviation]) and CO by the Doppler method ranged from 1.63 to 10.9 liters/min (mean 5.32 ± 1.83). The correlation coefficient was 0.97 (p < 0.001) and standard error of the estimate was 0.42. The regression equation showed that Doppler CO = 0.408 + 0.93 × thermodilution CO. The correlation in 29 volunteers for interobserver variability was 0.98 (p < 0.001) and in 18 volunteers for intraobserver variability was 0.97 (p < 0.001). Thus, CO can be determined accurately in many patients using this Doppler technique by trained and experienced persons; intra- and interobserver variability is small.
用于观察人体主动脉血流的无损伤超声技术
影响因子：
64.8
作者：
L. Light
通讯作者：
L. Light
影响因子：
4.8
作者：
Lee L. Huntsman;E. Gams;Curtis C. Johnson;Eugene Fairbanks
通讯作者：
Eugene Fairbanks