本文对86例正常足月妊娠的临产妇,进行产时母、胎血气与酸碱平衡的相关性变化的观察。其中63.95％发生呼吸性酸碱失衡。34.88％发生代谢性酸中毒。观察表明,胎儿头皮血pH可反映胎儿体内的酸碱平衡状态,尤其母动脉血与胎头皮血pH值差(pH)更能准确地诊断胎儿酸中毒。因此,作此测定对预防胎儿缺氧、减少胎儿酸中毒,搞好围产保健,有重要意义。 This article 86 cases of normal full-term pregnant women, the production of mother, fetal blood gas and acid-base balance of the changes observed. 63.95% of them have respiratory acid-base imbalance. 34.88% metabolic acidosis. Observations show that the fetal scalp blood pH can reflect the body’s acid-base balance, especially the poor blood pressure and fetal head blood pH value (pH) more accurate diagnosis of fetal acidosis. Therefore, for this determination to prevent fetal hypoxia, reduce fetal acidosis, improve perinatal care, is of great significance.