Intrapartum vibrator acoustic stimulation of the human fetus during episodes of decreased heart rate variability

Michael Y. Divon, Jeffrey J. Braverman, Denise A. Guidetti, Oded Langer, Irwin R. Merkatz

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

The effects of intrapartum vibratory acoustic stimulation during periods of decreased fetal heart rate variability were studied in 25 healthy term fetuses. Fetal monitoring and real-time ultrasound scanning were used simultaneously to detect fetal response. Vibratory acoustic stimulation was provided by an artificial larynx generating a signal at 85 dB and 85 Hz. This stimulus was applied for 5 seconds on the maternal abdomen over the fetal head after a 20-minute period of decreased fetal heart rate variability. All fetuses reacted with an immediate fetal heart rate acceleration of at least 10 bpm (range: 10 to 35 bpm, mean ± SD = 18.4 ± 7.0), and 19 fetuses also had sudden fetal body movement. A deceleration of the fetal heart rate after the initial acceleration was observed in nine fetuses (range: 10 to 70 bpm, mean ± SD = 45.5 ± 16.5). The implications of these findings are discussed in relation to the possible use of fetal vibratory acoustic stimulation for intrapartum surveillance.

Original languageEnglish (US)
Pages (from-to)1355-1358
Number of pages4
JournalAmerican Journal of Obstetrics and Gynecology
Volume157
Issue number6
DOIs
StatePublished - Jan 1 1987

Keywords

  • Healthy fetuses
  • decreased heart rate variability
  • vibratory acoustic stimulation

ASJC Scopus subject areas

  • Obstetrics and Gynecology

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