Mandruzzato G, Meir Y J, D'Ottavio G, Conoscenti G, Dawes G S
Department of Obstetrics and Gynaecology, Burlo Garofolo Institute, Trieste, Italy.
Br J Obstet Gynaecol. 1998 Mar;105(3):356-9. doi: 10.1111/j.1471-0528.1998.tb10100.x.
Computerised fetal heart rate records were obtained between 1987 and 1993 using the Sonicaid System 8000 for a cross-sectional study of postdates fetal heart rate variation; 567 singleton pregnancies at 41 and 43 weeks provided 1502 records. In all cases gestational age had been verified by ultrasound examination in early pregnancy. The mean minute range of the long term pulse interval variation, which is known to be correlated with fetal oxygenation was found to decrease progressively from an average value of 48.5 ms at 41 weeks to 46.4 ms and 42.4 ms at 42 and 43 or more weeks, respectively. When conservative management of postdate pregnancies is chosen, accurate measurements are needed to follow the evolution of fetal condition. Reference values for calculated pulse interval variation at later gestational ages are now provided.
1987年至1993年间，使用Sonicaid System 8000获取了计算机化的胎儿心率记录，用于过期胎儿心率变异的横断面研究；41至43周的567例单胎妊娠提供了1502条记录。所有病例的孕周均在孕早期通过超声检查得以确认。已知与胎儿氧合相关的长期脉搏间期变异的平均每分钟范围，被发现从41周时的平均48.5毫秒逐渐下降至42周时的46.4毫秒以及43周及以上时的42.4毫秒。当选择对过期妊娠进行保守管理时，需要精确测量以跟踪胎儿状况的演变。现在提供了孕晚期计算出的脉搏间期变异的参考值。
