Nomura Roseli Mieko Yamamoto, Kwon Clarice, Miyadahira Seizo, Zugaib Marcelo
Departamento de Obstetrícia e Ginecologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil.
Rev Bras Ginecol Obstet. 2009 Nov;31(11):547-51.
to study the effect of acoustic stimulation in the fetal cardiac response, according to parameters from computerized cardiotocography in low risk pregnancies.
twenty low risk pregnant women were included in the study, according to the following criteria: age over 18; single gestation, living fetus; gestational age between 36 and 40 weeks; amniotic liquid index over 8.0 cm and absence of fetal malformation. Cases with post-natal diagnosis of fetal anomaly were excluded. Computerized cardiotocography was performed for 20 minutes, before and after fetal acoustic stimulation. Results were analyzed by the t test for dependent samples, with significance level at p<0.05.
acoustic stimulation was successfully performed in all cases analyzed. By the analysis of the cardiotocographic parameters, there was no significant difference when the pre and post-stimulation parameters were compared: average number of fetal movements per hour (55.6 versus 71.9, p=0.1); mean basal fetal heart rate (FHR) (135.2 versus 137.5 bpm, p=0.3); mean FHR increases>10 bpm (6.5 versus 6.8, p=0.7); mean FHR increases>15 bpm (3.8 versus 4.3, p=0.5); mean duration of high FHR variation episodes (11.4 versus 10.9 min, p=0.7); mean duration of low FHR variation episodes (2.5 versus 1.1 min, p=0.2), and mean short-term variation (10.6 versus 10.9 ms, p=0.6).
in low risk gestations at term, computerized cardiotocography has not evidenced differences in the FHR parameters after the fetal sonic stimulation.
根据低风险妊娠中计算机化胎心监护的参数，研究声刺激对胎儿心脏反应的影响。
本研究纳入20名低风险孕妇，依据以下标准：年龄超过18岁；单胎妊娠，存活胎儿；孕周在36至40周之间；羊水指数超过8.0 cm且无胎儿畸形。排除产后诊断为胎儿异常的病例。在胎儿声刺激前后进行20分钟的计算机化胎心监护。结果采用配对t检验进行分析，显著性水平为p<0.05。
在所有分析病例中均成功实施了声刺激。通过对胎心监护参数的分析，刺激前后参数比较无显著差异：每小时胎儿平均胎动次数（55.6对71.9，p=0.1）；胎儿平均基础心率（FHR）（135.2对137.5次/分钟，p=0.3）；FHR增加>10次/分钟的平均值（6.5对6.8，p=0.7）；FHR增加>15次/分钟的平均值（3.8对4.3，p=0.5）；FHR高变异发作的平均持续时间（11.4对10.9分钟，p=0.7）；FHR低变异发作的平均持续时间（2.5对1.1分钟，p=0.2），以及平均短期变异（10.6对10.9毫秒，p=0.6）。
在足月低风险妊娠中，计算机化胎心监护未显示胎儿声刺激后FHR参数存在差异。
