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KMID : 0361719960070030296
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Korean Journal of perinatology
1996 Volume.7 No. 3 p.296 ~ p.303
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Fetal Heart Rate Response to Vibroacoustic Stimulation in Preterm Gestation using Computer Assisted Analysis
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한정렬
김은성/이재훈/신승철/김의숙/한호원
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Abstract
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Objective:
@EN The clinical application of vibroacoustic stimulation tes(VAST) is undetermined because previous studies did not demonstrate consistent response in preterm fetus. The purpose of this study was to examine the change of fetal heart rate(FHR)
parameters response to viboracoustic stimulation(VAST) in preterm gestation using a specially programmed computer(System 8000, Oxford Sonicaid Ltd. UK) which is commercially available since 1989.
@ES Study design:
@EN We studied 20 normal fetuses undergoing 30 minutes FHR recording and consecutive 30 minutes recording after VAS at 2 weeks interval from 24 to 32 gestational age. Student's t-test was used to determine statistical analysis.
@ES Results : 1) There were no significant differences of fetal movement and basal FHR after VAS. 2) There was a significant increase of number of accelerations exceeding 10 bpm and 15 bpm after VAS from 26 to 32 weeks. 3) Long term and short
term
FHR
variations also increased significantly in response to acoustic stimulation beyond 30 weeks 4) Spontaneous low amplitude decelerations(>20 bpm and ≥30sec) were present in 9 traces(4.5% : 6 traces NST, 3 traces VAST). Large deceleration(>20 lost
beats)
was noticed in only one VAST recording at 27 weeks of gestation. 5) Reactive pattern after VAS increased 15 to 20% at each gestation between 26 and 32 weeks of gestation.
@ES Conclusion : The use of VAS to elicit fetal heart rate accelerations can be confidently initiated by 26 weeks. FHR accelerations resulting from VAS in preterm fetus less than 32 weeks of gestation might be different from movement associated
accelerations of term fetus.
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