Fetal acoustic stimulation in early labor and pathologic fetal acidemia: A preliminary report

Chauhan, Suneet P.; Hendrix, Nancy W.; Devoe, Lawrence D.; Scardo, James A.

doi:10.1002/(sici)1520-6661(199909/10)8:5<208::aid-mfm2>3.0.co;2-g

Cited by 5 publications

(2 citation statements)

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“…The FAST has also been found to be useful in the early intrapartum period [16,17]. The fetal response to different intensity levels of vibro-acoustic stimulation and its long term effects on hearing and development have been studied and it has been found to be very safe [18,19].…”

Section: Introductionmentioning

confidence: 99%

The fetal acoustic stimulation test: a reliable and cost effective method of antepartum fetal monitoring

Batcha

Goonewardene

2009

Ceylon Med. J.

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Rationale A healthy foetus, if exposed to external sound stimulation, often responds with vigorous movements which can be felt by the mother. A hypoxic foetus usually does not show this response.Objectives To evaluate the fetal acoustic stimulation test (FAST) in antepartum fetal monitoring.Design and Setting Prospective interventional study carried out at the Teaching Hospital, Galle.Method An initial non-stress test (NST) followed by a FAST using the Corometric TM model 146 was carried out in 423 high risk pregnant women. The response to FAST was assessed and compared with the NST. A repeat NST was recorded in women who had an initial non-reactive NST. The results of the NST and FAST were compared with the fetal outcome if the woman delivered within 24 hours.Outcome measures Maternal perception of fetal movements after FAST, results of NST before and after FAST, and the babies' 5 minute Apgar scores if delivered within 24 hours of the FAST.Results Of the women, 349 ( 82.5 %) noticed fetal movements after FAST. Of the 167 women who complained of absent or reduced fetal movements, 67% felt fetal movements after FAST. Ninety one had a nonreactive NST and 43 (47 %) became reactive after FAST. Compared to the NST, the FAST had less sensitivity ( 93 % vs 100 %, p = 0.01 ), better specificity ( 79 % vs 45 %, p = 0.001 ), better positive predictive value ( 67 % vs 50 %, p = 0.02 ), similar negative predictive values ( 96 % vs 100 %, p > 0.05 ) and better accuracy ( 83% vs 69% , p = 0.03) in predicting neonatal asphyxia ( 5 minute Apgar score < 7) if the baby was delivered within 24 hours after the test.Conclusion The FAST is a reliable, cost effective screening test for antepartum fetal monitoring. It significantly reduces the false positive (non-reactive ) NST and has a good negative predictive value.

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Section: Introductionmentioning

confidence: 99%

The fetal acoustic stimulation test: a reliable and cost effective method of antepartum fetal monitoring

Batcha

Goonewardene

2009

Ceylon Med. J.

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“…The FAST has also been shown to be useful for assessment of fetal wellbeing during the early intrapartum period [10][11][12]. It has been shown that fetuses subjected to the FAST react with fetal heart rate accelerations if they are not acidotic [11][12][13]. Auditory sensation is considered to be the first to be affected by hypoxia and a negative response to the FAST may indicate hypoxia [13].…”

Section: Introductionmentioning

confidence: 99%

Fetal acoustic stimulation test for early intrapartum fetal monitoring

Goonewardene

Hanwellage²

2011

Ceylon Med. J.

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Introduction The fetal acoustic stimulation test (FAST) is a simple cost effective screening test for antenatal fetal monitoring. The aim of the study was to evaluate the FAST as a screening test for early intrapartum fetal well being. Methods An initial non stress test (NST) followed by a FAST using corometric model 146 was carried out in 486 participants in early labour with uncomplicated singleton pregnancies and >32 weeks gestation. A repeat NST was recorded in the participants who had an initial non reactive NST. The results of the NST and FAST were compared with fetal outcome. Maternal perception of fetal movements after FAST, results of NST before and after FAST, and the babies' 5 minute APGAR scores were measured. Results Of the 486 participants 413 (85%) noticed fetal movements after FAST. Initial NST was non reactive in 203 (42%) but 149 (31%) became reactive after FAST. Compared to the NST, FAST had a better sensitivity (97% vs 62%, p<0.001), specificity (100% vs 87%, p=0.017), positive predictive value (100% vs 98%, p=0.024), negative predictive value (79% vs 17%, p<0.001) and accuracy (99%vs 64%, p<0.001) in predicting 5 minute APGAR <7 in the baby. Conclusions FAST is a reliable screening test for assessing fetal well being in early labour. It complements the NST and is better than the NST alone.

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A randomized clinical trial of the intrapartum assessment of amniotic fluid volume: amniotic fluid index versus the single deepest pocket technique

Moses

Doherty

Magann

et al. 2004

American Journal of Obstetrics and Gynecology

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Fetal acoustic stimulation in early labor and pathologic fetal acidemia: A preliminary report

Cited by 5 publications

References 9 publications

The fetal acoustic stimulation test: a reliable and cost effective method of antepartum fetal monitoring

The fetal acoustic stimulation test: a reliable and cost effective method of antepartum fetal monitoring

Fetal acoustic stimulation test for early intrapartum fetal monitoring

A randomized clinical trial of the intrapartum assessment of amniotic fluid volume: amniotic fluid index versus the single deepest pocket technique

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