Panda A, McHardy G
Indian J Physiol Pharmacol. 1980 Apr-Jun;24(2):112-8.
The pulmonary diffusing capacity for Carbonmonoxide (DLCO) was measured in 20 normal volunteers of either sex at 9 a.m., 12 noon and 5 p.m. Forced expiratory volume in one second (FEV1) and forced vital capacity (FVC) were also determined after each DLCO measurement. There was a fall in the mean noon value of the diffusing capacity of the lungs which was statistically significant. The value at 5 p.m. was almost same as the noon value. The forced expiratory volume in one second and the forced vital capacity followed a similar trend. The DLCO, FEV1 and FVC appear to exhibit a diurnal rhythm.
在上午9点、中午12点和下午5点对20名正常志愿者（男女不限）测量了一氧化碳肺弥散量（DLCO）。每次测量DLCO后还测定了一秒用力呼气量（FEV1）和用力肺活量（FVC）。肺弥散量的中午平均值有所下降，具有统计学意义。下午5点的值与中午的值几乎相同。一秒用力呼气量和用力肺活量呈现类似趋势。DLCO、FEV1和FVC似乎呈现昼夜节律。
