Eighteen (41%) infants were noted to have postextubation atelectasis.Of these, 14 (77.8%) developed atelectsis within one day after extubation.The right upper lobe was frequently involved.

• 44例中，18例(41%25)产生气管内管拔管后的肺部膨胀不全，发生的时间以拔管后1天内居多，肺右上叶为最容易波及位置。