Dudenhausen J W, Luhr C, Dimer J S
Department of Obstetrics, Virchow-Klinikum, Humboldt University, Berlin, Germany.
Int J Gynaecol Obstet. 1997 Jun;57(3):251-8. doi: 10.1016/s0020-7292(97)02890-7.
To study the distributions of pH and gas values in umbilical arterial (UA) blood of normal newborns following uncomplicated pregnancies and vaginal births.
In 681 consecutive normal term infants who were born during 1990, we examined the UA pH and blood gas values obtained immediately following delivery. Maternal inclusion criteria were defined as an uncomplicated pregnancy and a normal spontaneous vaginal delivery. Umbilical artery blood samples were collected at each birth and were evaluated for pH, carbon dioxide pressure (PaCO2), oxygen pressure (PaO2), bicarbonate, and base excess. All newborns in this study had the following inclusion criteria: singletons, no malformations, growth appropriate for gestational age (AGA), and Apgar scores of 7 or more at 1, 5 and 10 min of life.
The lowest UA pH was 7.04 and the 10th percentile value was 7.21. The lowest UA PaO2 was 4.6 mmHg and the 10th percentile value was 10.1 mmHg. The highest UA PaCO2 was 75.4 mmHg and the 90th percentile 62 mmHg. The 10th percentile of the base deficit in the extracellular fluid was 5.9 mmol/l.
The distributions of the UA pH and gas values of a collective of normal newborns were illustrated.
研究正常妊娠及经阴道分娩的新生儿脐动脉血的pH值和气体值分布情况。
对1990年出生的681例连续足月正常婴儿，在分娩后立即检测其脐动脉pH值和血气值。产妇纳入标准为妊娠无并发症且自然阴道分娩正常。每次分娩时采集脐动脉血样本，评估其pH值、二氧化碳分压（PaCO2）、氧分压（PaO2）、碳酸氢盐和碱剩余。本研究中所有新生儿的纳入标准如下：单胎、无畸形、适于胎龄（AGA）、出生后1分钟、5分钟和10分钟时阿氏评分≥7分。
脐动脉最低pH值为7.04，第10百分位数为7.21。脐动脉最低PaO2为4.6 mmHg，第10百分位数为10.1 mmHg。脐动脉最高PaCO2为75.4 mmHg，第90百分位数为62 mmHg。细胞外液碱缺失的第10百分位数为5.9 mmol/l。
阐述了一组正常新生儿脐动脉pH值和气体值的分布情况。
