Fetal heart rate response to vibroacoustic stimulation during low and high heart rate variability episodes in late pregnancy

Spencer, John; Deans, Anne; Nicolaidis, Peter; Arulkumaran, Sabaratnam

doi:10.1016/0002-9378(91)90230-o

Cited by 28 publications

(17 citation statements)

References 20 publications

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“…In their study the next complete spontaneous behavioural cycle was of similar duration to the cycle recorded on the previous day indicating that the disruption of fetal behaviour did not extend beyond the stimulated cycle. Our fmdings are in agreement with that of SPEN-CER et al [13] and with that of previous studies which indicate that vibro-acoustic Stimulation during low FHR variability produces an abrupt change from quite to active fetal state with a transient period fetal tachycardia. Vibro-acoustic Stimulation applied äs in clinical practice did not alter the duration of the high and low FHR variability episodes indicating no long lasting effects on the fetus.…”

Section: Discussionsupporting

confidence: 95%

“…SPENCER et al [13] studied the complete "behavioural cycle" following one Stimulus of vibro-acoustic Stimulation äs would be used in clinical situations. They found that the duration of high variability after vibroacoustic Stimulation during low variability episode was significantly shorter than the pre-and post-stimulation high variability components of complete rest-activity cycles.…”

Section: Discussionmentioning

confidence: 99%

“…Disturbance to the fetus caused by vibro-acoustic Stimulation may be unphysiological and potentially harmful. Possibility of catecholamine release [3], hearing defects [1] and undue alteration in the fetal movement and FHR pattern are under investigation [13].…”

mentioning

confidence: 99%

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Vibro-acoustic stimulation does not alter the duration of high and low fetal heart rate variability episodes

Montán

Arulkumaran²,

Nyman³

et al. 1992

Jpme

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To study the effect of vibro-acoustic stimulation on high and low fetal heart rate (FHR) variability episodes. Prospective control study, in 21 high risk pregnancies between 32 to 39 weeks gestation. FHR pattern was recorded with cardiotocograph (CTG). After 5 min low FHR variability a vibro-acoustic stimulator was activated in contact with or above the maternal abdomen (sham) on a random basis on two consecutive days, and CTG was continued to obtain a complete high and low FHR variability cycle. Complete high and low FHR variability cycles were obtained in 12 patients with mean recording time of 129.5 minutes (range 69-185 min). The mean baseline FHR increased by 32.5 +/- 9.4 bpm after contact vibro-acoustic stimulation, but remained unchanged after sham stimulation. Mean duration of high FHR variability was 56.6 +/- 32.9 min and 47.3 +/- 23.7 min, respectively, and mean duration of the consecutive low FHR variability episode was similar after contact and sham stimulation. The complete cycles were 71.1 +/- 34.7 min and 66.2 +/- 21.2 min, respectively. Vibro-acoustic stimulation induced an abrupt change from low to high FHR variability, but the complete cycle of high and low FHR variability was not altered, when compared with the corresponding cycle following sham stimulation on the same fetus.

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Section: Discussionsupporting

confidence: 95%

Section: Discussionmentioning

confidence: 99%

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Vibro-acoustic stimulation does not alter the duration of high and low fetal heart rate variability episodes

Montán

Arulkumaran²,

Nyman³

et al. 1992

Jpme

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“…However this has not always been observed 3 Furthermore, Leader et al 102 found no difference in the duration individuals spent in each type of behavioural state before and following an episode of stimulation with a vibroacoustic stimulator. Spencer et at 103 , found that following vibroacoustic stimulation the time spent in high heart rate variabitity was shorter when stimulated during periods of low heart rate variability but observed no prolonged tachycardias or atypical patterns.…”

Section: Safetymentioning

confidence: 96%

Fetal Habituation

Hepper

Leader

1996

Fet. Matern. Med. Rev.

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One aim of obstetric practice is to ensure the wellbeing of the fetus. This is by no means an easy task and recent years have seen the development of a variety of tests, with varying degrees of success, to evaluate fetal health.Fetal wellbeing may be assessed at a variety of levels: genetic/cellular, physical/structural or functional. Ideally the evaluation of fetal health should provide information about the functional outcome of any particular condition, especially the performance of the central nervous system. Current tests may not do this. Thus, whilst tests of the fetal chromosomal or genetic constitution may determine the presence of particular genetic/chromosomal conditions, they may not predict functional outcome especially the functioning of the cerebral cortices, the ultimate arbiter of excellence in man. For example, Down's syndrome may be accurately diagnosed by analysis of fetal cells to detect the presence of Trisomy 21 but this in itself provides little information on the subsequent functional performance of the individual. The development of tests of fetal heart function such as antenatal cardiotocography have provided a means of assessing cardiac function and, to a certain extent, the functioning of parts of the autonomic nervous system. However such tests can only indirectly assess cortical function.

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“…Accelerations of fetal health surveillance (FHS) observed with fetal movements is regarded as a reliable sign of fetal well being. 4 Often fetus is asleep and there is absence of spontaneous fetal heart rate (FHR) acceleration, manual manipulation, auditory or visual stimuli has been shown to evoke a response of FHR acceleration during intrapartum period 1,6 Vibroacoustic stimulation is a simple noninvasive method and it has been proposed as a tool in the assessment of fetal well being in the presence of nonreassuring CTG during first and second stages of labor. Presence of normal FHR tracing is associated with almost good outcome, but nonreassuring CTG is not uniformly associated with acidosis.…”

Section: Introductionmentioning

confidence: 99%

Intrapartum Vibroacoustic Stimulation Test and Cardiotocography for the Prediction of Neonatal Outcome

Bano¹,

Nasreen²,

Kavitha³

2012

Journal of South Asian Federation of Obstetrics and Gynaecology

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Objectives: To evaluate the role of intrapartum vibroacoustic stimulation (VAST) and cardiotocography (CTG) for the prediction of neonatal outcome. Materials and methods:One hundred and twenty-five patients in labor with cephalic presentation were selected and subjected to CTG and VAST was done further to find out whether fetus is reactive or nonreactive and findings were correlated with the fetal outcome.Results: VAST is a good predictor of fetal well being. It is less time consuming, inexpensive and technically easy to perform. In developing countries, where fetal scalp blood sampling is not available in all institutions, VAST can effectively be used as a clinical tool to compliment abnormal CTG traces for better prediction of fetal outcome.

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Fetal heart rate response to vibroacoustic stimulation during low and high heart rate variability episodes in late pregnancy

Cited by 28 publications

References 20 publications

Vibro-acoustic stimulation does not alter the duration of high and low fetal heart rate variability episodes

Vibro-acoustic stimulation does not alter the duration of high and low fetal heart rate variability episodes

Fetal Habituation

Intrapartum Vibroacoustic Stimulation Test and Cardiotocography for the Prediction of Neonatal Outcome

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