McNamara H, Johnson N
Leeds General Infirmary, Academic Unit of Obstetrics and Gynaecology, UK.
Br J Obstet Gynaecol. 1995 Aug;102(8):644-7. doi: 10.1111/j.1471-0528.1995.tb11403.x.
To find out what happens to fetal arteriolar oxygen saturation during a uterine contraction.
Prospective observational study.
Labour ward, St James's University Hospital, Leeds.
Eighteen women in normal labour monitored with a fetal scalp surface pulse oximetry sensor, an intrauterine pressure catheter, and a head to cervix force transducer.
The effect of intrauterine pressure and head to cervix force on fetal arteriolar oxygen saturation was examined using time series analysis and a regression model of 159 contractions.
Fetal oxygen saturation during a contraction.
The average oxygen saturation drops after a contraction. The greatest drop in oxygen saturation is reached 92 s after the peak of a contraction and takes approximately 1 min 30 s to recover (P = 0.036).
Uterine contractions during normal labour affect fetal oxygen saturation.
了解子宫收缩期间胎儿小动脉血氧饱和度会发生什么变化。
前瞻性观察性研究。
利兹圣詹姆斯大学医院的分娩病房。
18名正常分娩的女性，使用胎儿头皮表面脉搏血氧饱和度传感器、宫内压力导管和头部至宫颈力传感器进行监测。
采用时间序列分析和159次宫缩的回归模型，研究宫内压力和头部至宫颈力对胎儿小动脉血氧饱和度的影响。
宫缩期间胎儿血氧饱和度。
宫缩后平均血氧饱和度下降。血氧饱和度在宫缩峰值后92秒降至最低，大约需要1分30秒恢复（P = 0.036）。
正常分娩期间的子宫收缩会影响胎儿血氧饱和度。
