Computerized analysis of fetal heart rate pattern in the third trimester of low-risk pregnancy by long-range electronic fetal monitoring
| Autor: | Song Zhang, Lian Chen, Nan Wang, Guang-Fei Li, Yan Wang, Yangyu Zhao, Shufang Li |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
medicine.medical_specialty
Cardiotocography Pregnancy Trimester Third Gestational Age Third trimester 03 medical and health sciences Low risk pregnancy 0302 clinical medicine Fetus Fetal Heart Pregnancy Electronic fetal monitoring medicine Humans 0501 psychology and cognitive sciences Fetal Monitoring 030219 obstetrics & reproductive medicine Obstetrics business.industry 05 social sciences Computerized analysis Obstetrics and Gynecology Gestational age Infant Heart Rate Fetal Fetal heart rate embryonic structures Pediatrics Perinatology and Child Health Female Fetal Heart Rate Pattern business 050104 developmental & child psychology |
| Zdroj: | The journal of maternal-fetalneonatal medicine : the official journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians. 35(25) |
| ISSN: | 1476-4954 |
| Popis: | With computerized analysis of fetal heart rate(FHR) data from long-range monitoring, we aimed to comprehensively clarify the characteristics of FHR with increasing gestational age in low-risk pregnant women during the third trimester of pregnancy.This was an observational study. 85 fetuses of low-risk pregnant women were included. The data covered 28 ∼ 40 weeks of gestation, and 125 cases of FHR monitoring from 85 fetuses were totally collected. The FHR baseline rate, variability, and acceleration were computationally calculated, analyzed and compared.The average effective monitoring time for each case was 13.9 ± 4.3 h. FHR baseline gradually decreased as the gestational age progressed, and the maximum FHR baseline appeared at 28-29 weeks, which was 137.5 (133.0, 141.3) bpm, whereas the minimum FHR baseline appeared at 38-39 weeks, that was 132.8 (128.1, 138.4) bpm. FHR variability fluctuated in (4-12）bpm. It gradually increased from 28 to 33 weeks of gestation, reached the maximum of 7.6 (6.0-9.4) bpm, and then decreased until full-term pregnancy. The moderate variability proportion of FHR gradually increased from 28 weeks of gestation, peaked at 32-33 weeks as 65.8%, and then gradually decreased to 56.2% at 37 weeks, which was maintained at this level until 39 weeks. The variation tendency of minimal variability proportion was opposite to moderate variability proportion. When it reached 40 weeks, the minimal and moderate variability proportions were 50.0% and 49.0%, respectively. The FHR acceleration area showed no trend change during the third trimester, while fluctuated in (29.5-42.4) lattices/h.This study revealed that the characteristics of FHR gradually changed with increasing gestational age, and the most obvious change was observed at 32-33 weeks, demonstrating that the specific gestational weeks may be an important period for the physiological bias of FHR tends to mature. |
| Databáze: | OpenAIRE |
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