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文献报导在产程中持续或进行性胎心过缓发展为晚期减速,预示胎儿严重缺氧可致猝死.第二产程中胎心迟缓的基线小于80次/分,虽不诊断胎儿窒息,但与新生儿酸中毒有关.分娩中胎心图出现上述情况时,产科医师担忧采取胎血检验以确诊酸中毒会延误治疗,若此时改善供氧促使胎儿复苏可改善出生情况.O’Connor及Hytten(1979)给母体高浓度氧以增加胎儿的氧合作用.补氧同时使用β拟交感神经药以消除宫缩,使进入胎体的氧显著增加(Schneider等1980).此疗法也可使胎心图改
Reported in the literature continued or during labor to delay the development of fetal bradycardia as a late slowdown, indicating a serious fetal hypoxia can cause sudden death .First stage of labor fetal heart rate baseline was less than 80 beats / min, although not diagnosed fetal asphyxia, but with Neonatal acidosis .Fetal heart map in laborIn this case, obstetricians worried about fetal blood test to confirm the acidosis will delay treatment, if this time to improve oxygen supply to promote fetal recovery can improve the birth situation.O’Connor and Hytten (1979) High concentrations of oxygen in the maternal body to increase fetal oxygenation. Oxygen supplementation is accompanied by the use of beta sympathomimetics to eliminate uterine contractions, resulting in a significant increase in oxygen entering the carcass (Schneider et al., 1980) Heart map change