Froese N, Friesen R
Department of Anesthesia, University of Manitoba, Faculty of Medicine, Winnipeg.
Can J Anaesth. 1991 Oct;38(7):931-4. doi: 10.1007/BF03036977.
The ABCOM 1 transtracheal Doppler (TTD) has been developed as a non-invasive cardiac output monitor. With this device, cardiac output is continuously calculated from ascending aortic blood flow velocity and aortic diameter obtained via an ultrasound transducer incorporated into the tip of an endotracheal tube. We evaluated the clinical use of the ABCOM 1 monitor and compared cardiac outputs obtained using the TTD system with simultaneous thermodilution (TD) measurements. We found the operation of the ABCOM 1 monitor to be difficult and time-consuming. In our operating rooms, acceptable Doppler signal quality was difficult to obtain. There was no correlation between 36 simultaneously obtained TTD and TD cardiac output measurements. The average difference between measurement techniques and the limits of agreement were unacceptably large (mean difference = 3.04 L.min-1, mean +/- 2 SD = -6.04 to 12.48 L.min-1). Separately analyzing only those measurements during which Doppler signal quality was adequate did not improve agreement between TTD and TD measurements. On the basis of these findings, TTD cannot be recommended as a clinical cardiac output measurement technique.
ABCOM 1经气管多普勒（TTD）已被开发为一种非侵入性心输出量监测仪。使用该设备，通过内置在气管导管尖端的超声换能器获取升主动脉血流速度和主动脉直径，进而持续计算心输出量。我们评估了ABCOM 1监测仪的临床应用，并将使用TTD系统获得的心输出量与同时进行的热稀释（TD）测量结果进行了比较。我们发现ABCOM 1监测仪操作困难且耗时。在我们的手术室中，难以获得可接受的多普勒信号质量。同时获得的36次TTD和TD心输出量测量结果之间没有相关性。测量技术之间的平均差异和一致性界限大得令人无法接受（平均差异 = 3.04 L·min⁻¹，平均±2标准差 = -6.04至12.48 L·min⁻¹）。仅单独分析那些多普勒信号质量足够的测量结果，并未改善TTD和TD测量结果之间的一致性。基于这些发现，TTD不能被推荐作为临床心输出量测量技术。
