Vibroacoustic stimulation (VAS)orFetal Vibroacoustic Stimulation is the application of a vibratory sound stimulus to the abdomen of a pregnant woman to induce FHR accelerations. The presence of FHR accelerations reliably predicts the absence of fetal metabolic acidemia. Vibroacoustic stimulation is typically used during a nonstress test (NST).[1][2][3]
In 2013, the Cochrane Database of Systematic Reviews concluded that there was insufficient evidence from randomized trials to support its use to assess fetal well-being in labor.[4] A related Cochrane Review, however, concluded that its use in antenatal testing did reduce the incidence of non-reactive cardiotocography and the overall testing time.[5]
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Tests and procedures relating to pregnancy and childbirth
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| Maternal tests |
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| Fetal tests |
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| Interventions |
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| Delivery |
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Pregnancy and childbirth
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| Planning |
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| Conception |
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| Testing |
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| Types |
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| Childbirth |
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| Prenatal |
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| Postpartum |
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| Obstetric history |
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