Cardiac output determinations in the pig--thoracic electrical bioimpedance versus thermodilution.
Cardiac output determinations in the pig--thoracic electrical bioimpedance versus thermodilution.
复制标题
猪的心输出量测定——胸部生物阻抗与热稀释。
作者：
L. Jivegård;I. Frid;H. Haljamäe;J. Holm;S. Holm;I. Wickström
与热稀释（TD）技术相比，评估了经胸生物电阻抗（TEB）连续、无创测量猪心输出量（Qt）的准确性。使用 TEB 技术，必须对猪的不同胸廓习性进行校正。使用 NCCOM3-R6 心动力计算机中的胸廓长度值（测量值加 25%），获得与 TD 技术的良好相关性（r = .87；p 小于 0.001；n = 86），对于体重为 40 至 75 kg 的猪，Qt 值范围为 2.9 至 9.8 L/min。然而，NCCOM3 给出的 Qt 值在整个值范围内系统地比 NCCOM-3 和 TD Qt 值的平均值高 11% 至 15%。基于本研究中 TEB 和 TD 技术在广泛的 Qt 值上的良好一致性，我们得出结论，TEB 为实验猪模型中 Qt 测定提供了一种有价值的、连续的、非侵入性的 TD 替代方案。
The accuracy of transthoracic electrical bioimpedance (TEB) for continuous, noninvasive measurement of cardiac output (Qt) in pigs was assessed in comparison with the thermodilution (TD) technique. Using the TEB technique, the different thoracic habitus of the pig had to be corrected for A good correlation with the TD technique was obtained (r = .87; p less than .001; n = 86) using thoracic length value (the measured value plus 25%) in an NCCOM3-R6 cardiodynamic computer for Qt values ranging from 2.9 to 9.8 L/min in pigs weighing from 40 to 75 kg. However, the Qt values given by the NCCOM3 were systematically 11% to 15% higher over the full range of values than the average of NCCOM-3 and TD Qt values. On the basis of the good agreement in the present study between the TEB and TD techniques over a broad range of Qt values, we conclude that TEB offers a valuable continuous, noninvasive alternative to TD for Qt determinations in experimental porcine models.