Sandberg K L, Lindstrom D P, Krueger E D, Sundell H, Cotton R B
Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee 37232.
Pediatr Res. 1988 Mar;23(3):253-6. doi: 10.1203/00006450-198803000-00003.
Electrical impedance plethysmography was evaluated in lambs as a method of measuring tidal volume (VT). Over tidal volumes ranging from 15 to 414% of estimated dead space, and frequencies of 300 to 1000 breaths/min, correlation between VT measured by the impedance technique and VT measured by whole-body plethysmography was 0.98. Above 600 breaths/min, the correlation between the two methods was 0.94. Independent calibration of the impedance technique using a pneumotachograph at conventional rates of ventilation yielded absolute values of VT which closely corresponded to values obtained with the whole-body plethysmograph (slope = 1.05, intercept = 1.4 ml, r = 0.99). These results support the potential utility of impedance plethysmography in clinical applications of high frequency ventilation.
在羔羊中对电阻抗体积描记法进行了评估，将其作为测量潮气量（VT）的一种方法。在潮气量范围为估计死腔的15%至414%，呼吸频率为300至1000次/分钟的情况下，通过阻抗技术测量的VT与通过全身体积描记法测量的VT之间的相关性为0.98。在600次/分钟以上，两种方法之间的相关性为0.94。使用气动流速仪以传统通气速率对阻抗技术进行独立校准，得到的VT绝对值与全身体积描记仪获得的值密切对应（斜率 = 1.05，截距 = 1.4毫升，r = 0.99）。这些结果支持了电阻抗体积描记法在高频通气临床应用中的潜在效用。
