Rodenstein D O, Sopwith T, Denison D M, Stanescu D C
Bull Eur Physiopathol Respir. 1985 Nov-Dec;21(6):521-5.
To clarify whether the radiographic estimate of total lung capacity (TLC) using the method of Barnhard et al., as modified by Loyd et al., yields accurate values, we measured TLC in 20 young healthy subjects with the above technique (Vb). We compared it to the more sophisticated radiologic method of Pierce et al. (Vp) and to plethysmographic measurements (Vbox). Plethysmographic results, 7.38 +/- 0.94 l (mean +/- SD) or 101.7% of predicted, were significantly higher than Vb (mean difference 0.53 +/- 0.68 l; p less than 0.005 by paired t test), but were not significantly different from Vp (mean difference 0.13 +/- 0.52 l). Based on these and previous data, we conclude that the Pierce et al. approach yields more accurate results than the Barnhard and Loyd method, although individual data, in both methods, should be interpreted cautiously.
为了明确采用经Loyd等人改良的Barnhard等人的方法对总肺容量（TLC）进行的影像学评估是否能得出准确值，我们使用上述技术（Vb）对20名年轻健康受试者的TLC进行了测量。我们将其与Pierce等人更复杂的放射学方法（Vp）以及体积描记法测量结果（Vbox）进行了比较。体积描记法结果为7.38±0.94升（平均值±标准差），或预测值的101.7%，显著高于Vb（配对t检验，平均差值0.53±0.68升；p<0.005），但与Vp无显著差异（平均差值0.13±0.52升）。基于这些数据和之前的数据，我们得出结论，尽管两种方法的个体数据都应谨慎解读，但Pierce等人的方法比Barnhard和Loyd的方法能得出更准确的结果。
