Hayakawa M, Okumura A, Hayakawa F, Watanabe K, Ohshiro M, Kato Y, Takahashi R, Tauchi N
Department of Pediatric Cardiology and Neonatology, Ogaki Municipal Hospital, Ogaki, Gifu-Pref, Japan.
Arch Dis Child Fetal Neonatal Ed. 2001 May;84(3):F163-7. doi: 10.1136/fn.84.3.f163.
To clarify the features of the background electroencephalographic (EEG) activities in clinically well preterm infants born at less than 27 weeks gestation and to outline their chronological changes with increasing postconceptional age (PCA).
EEGs of clinically well premature infants born at less than 27 weeks gestation were recorded during the early postnatal period. The infants were separated into three groups according to their PCA at the time of EEG recording (21-22 weeks PCA, 23-24 weeks PCA, and 25-26 weeks PCA). The mean and maximum duration of interburst intervals (IBIs), the mean duration of bursts, and the percentage of continuous and discontinuous patterns in each PCA group were evaluated.
There were three infants at 21-22 weeks PCA, seven at 23-24 weeks PCA, and five at 25-26 weeks PCA. Eighteen EEG recordings were obtained. The mean and maximum IBI duration decreased with increasing PCA. The percentage of continuous patterns increased with increasing PCA. Conversely, the percentage of discontinuous patterns decreased with increasing PCA.
In premature infants born at less than 27 weeks gestation, the characteristics of the background EEG activities were similar to those of older premature infants. These changes reflect the development of the central nervous system in this period.
阐明孕27周前出生的临床状况良好的早产儿背景脑电图（EEG）活动的特征，并概述其随孕龄（PCA）增加的时间变化。
在出生后早期记录孕27周前出生的临床状况良好的早产儿的脑电图。根据脑电图记录时的PCA将婴儿分为三组（PCA 21 - 22周、PCA 23 - 24周和PCA 25 - 26周）。评估每组PCA中爆发间期（IBIs）的平均和最长持续时间、爆发的平均持续时间以及连续和不连续模式的百分比。
PCA 21 - 22周时有3名婴儿，PCA 23 - 24周时有7名婴儿，PCA 25 - 26周时有5名婴儿。共获得18份脑电图记录。IBI的平均和最长持续时间随PCA增加而减少。连续模式的百分比随PCA增加而增加。相反，不连续模式的百分比随PCA增加而减少。
孕27周前出生的早产儿，背景脑电图活动的特征与较大孕周的早产儿相似。这些变化反映了这一时期中枢神经系统的发育。
