％0轴型术罗森特，M％A衬套，A％T同时比较乙炔或二氧化碳通量作为儿童有效肺血流量的衡量标准％D 1997％J欧洲呼吸轴颈％P 2586-2590％V.10％N 11％X乙炔（AC）和二氧化碳均可用于测量有效的肺血流（Q'eff）。在休息和运动期间，它们在成人中安全且合理准确，但儿童没有同时比较。使用InnovisionQuadrupole质谱仪研究了一百六个健康的儿童（55名男性和51名女性，年龄8-17 YRS）。他们都在休息的五个释放中进行了五次再灌注，然后在自行车运动9分钟后再次进行单一测量。通过线性（L）或曲线（C）外推方法计算混合静脉CO 2水平。在静止时，Q'eff的变异系数为AC 8％，即10％和C 16％（P <0.001）。中值静止值为：AC 3.2（95％置信区间（95％CI）3.1-3.4）L 5.1（95％CI 4.6-5.4）和C 4.7（95％CI 4.3-5.1）L X min（-1）x m(-2), (p<0.001). Compared to Ac, only 14 and 17% of L and C values, respectively, were +/-0.5 L x min(-1) x m(-2), whilst 41 and 29%, respectively were more than +/-2 L x min(-1) x m(-2). During exercise, median values were: Ac 6.7 (95% CI 6.3-7.0); L 8.0 (95% CI 7.3-8.4); and C 7.2 (95% CI 6.5-7.9) L x min(-1) x m(-2). L was significantly greater than C (p<0.001), but C was similar to Ac (p=0.06). More than 50% of L and C values could not be calculated for various reasons, whereas all 106 Ac values could be calculated. Neither carbon dioxide method is sufficiently reliable to be used in children in a clinical setting. Acetylene was safe, reliable, accurate and preferred. %U //www.qdcxjkg.com/content/erj/10/11/2586.full.pdf