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Electrical velocimetry has limited accuracy and precision and moderate trending ability compared with transthoracic echocardiography for cardiac output measurement during cesarean delivery: A prospective observational study.

与经胸超声心动图相比,电测速在剖宫产术中测量心输出量的准确性和精确度有限,并且趋势适中: 一项前瞻性观察研究。

  • 影响因子:1.95
  • DOI:10.1097/MD.0000000000021914
  • 作者列表:"Feng SM","Liu J
  • 发表时间:2020-08-21
Abstract

:We aimed to evaluate the accuracy and interchangeability of stroke volume and cardiac output measured by electrical velocimetry and transthoracic echocardiography during cesarean delivery.We enrolled 20 parturients in this prospective observational study. We recorded the stroke volume and cardiac output using both methods and compared the values at seven specific time points. We analyzed the data using linear regression analysis for Pearson's correlation coefficients and Bland-Altman analysis to determine percentage errors. We conducted a trending ability analysis based on the four-quadrant plot with the concordance rate and correlation coefficient.We recorded 124 paired datasets during cesarean delivery. The correlation coefficients of the measured cardiac output and stroke volume between the two methods were 0.397 (P < .001) and 0.357 (P < .001). The 95% limits of agreement were -1.0 to 8.1 L min for cardiac output and -10.4 to 90.4 ml for stroke volume. Moreover, the corresponding percentage errors were 62% and 60%. The concordance correlation coefficients were 0.447 (95% CI: 0.313-0.564) for stroke volume and 0.562 (95% CI: 0.442-0.662) for cardiac output. Both methods showed a moderate trending ability for stroke volume (concordance rate: 82% (95% CI: 72-90%)) and cardiac output (concordance rate: 85% (95% CI: 78-93%)).Our findings indicated that electrical velocimetry monitoring has limited accuracy, precision, and interchangeability with transthoracic echocardiography; however, it had a moderate trending ability for stroke volume and cardiac output measurements during cesarean delivery.

摘要

: 我们的目的是评估在剖宫产过程中通过电测速和经胸超声心动图测量的每搏输出量和心输出量的准确性和互换性。我们在这项前瞻性观察研究中纳入了20名产妇。我们使用两种方法记录每搏输出量和心输出量,并比较在七个特定时间点的值。我们使用皮尔逊相关系数的线性回归分析和Bland-Altman分析来确定百分比误差。我们基于四象限图与一致率和相关系数进行了趋势分析。我们在剖宫产期间记录了124个配对数据集。两种方法测得的心输出量和每搏输出量的相关系数分别为0.397 (p <.001) 和0.357 (p <.001)。95% 的一致性界限是心输出量的-1.0至8.1 ll min min和每搏输出量的-10.4至90.4  ml。此外,相应的百分比误差为62% 和60%。每搏输出量的一致性相关系数为0.447 (95% CI: 0.313-0.564),心输出量的一致性相关系数为0.562 (95% CI: 0.442-0.662)。两种方法对每搏输出量 (一致率: 82% (95% CI: 72-90%)) 和心输出量 (一致率: 85% (95% CI: 78-93%)) 都显示出中等趋势能力。我们的研究结果表明,电测速监测具有有限的准确性,精度和与经胸超声心动图的互换性; 然而,它在剖宫产期间具有中等趋势的每搏输出量和心输出量测量能力。

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作者列表:["Dev M","Sharma M","Rana N"]

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心脏影像技术方向

心脏结构和心脏血流的可视化,用于诊断评估或通过内窥镜、放射性核素成像等技术来指导心脏手术。

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