Fetal acoustic stimulation in early labor in patients screened with the admission test

L. Ingemarsson, S. Arulkumaran, R. H. Paul, E. Ingemarsson, R. L. Tambyraja, S. S. Ratnam

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

Fetal heart rate reactions to the fetal acoustic stimulation test were investigated in 952 women in early labor. All had cephalic presentations (>33 weeks of gestation) and were screened with a 15-minute fetal heart rate recording (admission test) before the sound stimulation was applied. Three different types of responses were observed: type I, an accelerative response; type II, a biphasic response with acceleration(s) followed by a deceleration; type III, no response or a prolonged deceleration (>60 beats/min and >60 seconds). A type I response was recorded in 98.0% of the women after a reactive admission test result, in 90.2% after an equivocal admission test result, and in 42.9% after an ominous admission test result. Fetal distress in labor occurred in these three groups in 2.0%, 22.2%, and 35.7% of cases, respectively. The risk for fetal distress was high after an ominous admission test and a type III response on the fetal acoustic stimulation test (75.0%). The fetal acoustic stimulation test might be of value in labor and give additional information about fetal well-being in patients previously screened by the admission test. Testing time can be shortened after an equivocal admission test.

Original languageEnglish
Pages (from-to)70-74
Number of pages5
JournalAmerican Journal of Obstetrics and Gynecology
Volume158
Issue number1
DOIs
Publication statusPublished - 1988

Keywords

  • admission test
  • Fetal acoustic stimulation
  • fetal heart rate
  • labor

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