抽象的
本研究的目的是评估健康学龄前儿童的常规功能残留能力(FRC)测量的可行性。此外,研究了准确性和再现性,并收集了正常值。使用大规模生产的闭合氦稀释装置(滚动密封件)。选择113个健康儿童(从571衡量)基于广泛的个人和家族历史调查问卷以及进行测量之前的临床检查。三次连续尝试有可能在73%的儿童(可重复系数95.3ml)中实现至少两个可重复的测量。嘴角和不规则呼吸模式的主要问题是泄漏。执行测量的平均时间是113秒。男孩的平均frc显着高于女孩:778对739毫升,体长110厘米(P <0.05)。FRC与高度(h)(r = 0.69)相关,重量(w)(r = 0.56),年龄(a)(r = 0.62),所有三个组合(r = 0.70):frc = -534.89 + 1.84 x w(kg)+ 10.07 x h(cm)+ 2.51 x a(月)。 When a power or exponential function was used to describe FRC as a function of height, the results were not superior to the linear regression (r=0.69): FRC (mL) = -766.2 + 13.8 x H (cm) (r=0.69) or FRC (L) = 0.620 x H (m)(2.03) (r=0.69) or FRC (mL)= 99.5 x e(0.018xH (cm)) (r=0.69). Among these, we recommend the power function because it will better fit broader height ranges. Reliable functional residual capacity measurements can be routinely performed in preschool children with a mass-produced device. Reference values were collected for children 95-125 cm in height.