Huang G, Chen Q
Hua Xi Yi Ke Da Xue Xue Bao. 1991 Sep;22(4):391-3.
A "convenient calculation" of MTTp = 0.1 FVC/2 Vp was derived from the principle of Jordanoglou to measure the partial mean transit time (MTTp). It was used to calculate the MTTp from the maximal expiratory flow volume (MEFV) curve of 342 healthy young children. The multiple regression equations were built with age, height and FVC as independent variables. The result showed that the MTTp of all children were elongated with the decay of lung volume with a similar rule as in the old, middle-aged and young people. No regular changes of MTTp in age groups were noticed. The regression equations showed that the MTTp of boys were positively correlated with FVC; while those of girls were negatively correlated with age; besides, MTT20-30% and MTT70-80% were positively correlated with FVC. The age and FVC just had the opposite effects so that little regular changes of MTTp occurred in the age groups.
MTTp = 0.1 FVC/2 Vp 的“简便计算方法”源自约旦诺格鲁原理，用于测量部分平均通过时间（MTTp）。它被用于根据342名健康幼儿的最大呼气流量容积（MEFV）曲线计算MTTp。以年龄、身高和用力肺活量（FVC）作为自变量建立多元回归方程。结果显示，所有儿童的MTTp均随肺容积减小而延长，规律与老年人、中年人和年轻人相似。未观察到各年龄组MTTp有规律变化。回归方程表明，男孩的MTTp与FVC呈正相关；而女孩的MTTp与年龄呈负相关；此外，MTT20 - 30%和MTT70 - 80%与FVC呈正相关。年龄和FVC的作用相反，因此各年龄组MTTp几乎没有规律变化。
