Vibroacoustic stimulation

Vibroacoustic stimulation (VAS), sometimes referred to as fetal vibroacoustic stimulation or fetal acoustic stimulation test (FAST), is the application of a vibratory sound stimulus to the abdomen of a pregnant woman to induce FHR (fetal heart rate) 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]

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.^[3] 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.^[4]

References

↑ Chervenak, Frank A.; Kurjak, Asim (2006). Textbook of Perinatal Medicine, Second Edition (Two Volumes). Informa Healthcare. p. 963. ISBN 1-84214-333-6.
↑ Association of Women’s Health, Obstetric, and Neonatal Nurses (2005). Audrey Lyndon, Linda Usher Ali, ed. Fetal Heart Monitoring: Principles and Practices (3rd ed.). Dubuque, IA: Kendall/Hunt Publishing Co. ISBN 978-0-7575-6234-1.
↑ East, C. E.; Smyth, R. M.; Leader, L. R.; Henshall, N. E.; Colditz, P. B.; Lau, R.; Tan, K. H. (2013). East, Christine E, ed. "Vibroacoustic stimulation for fetal assessment in labour in the presence of a nonreassuring fetal heart rate trace". The Cochrane Library. 1: CD004664. doi:10.1002/14651858.CD004664.pub3. PMID 23440793.
↑ Tan, K. H.; Smyth, R. M.; Wei, X. (2013). Tan, Kelvin H, ed. "Fetal vibroacoustic stimulation for facilitation of tests of fetal wellbeing". The Cochrane Library. 12: CD002963. doi:10.1002/14651858.CD002963.pub2. PMID 24318543.

Obstetrical surgery and other procedures (ICD-9-CM V3 72–75, ICD-10-PCS 1)

Diagnostic

Pregnancy test

Leopold's maneuvers

Cardiotocography Fetoscopy Fetal scalp blood testing Fetal scalp stimulation test

sampling:	fetal tissue Chorionic villus sampling Amniocentesis blood Triple test Percutaneous umbilical cord blood sampling Apt test Kleihauer–Betke test lung maturity Lecithin–sphingomyelin ratio Lamellar body count Fetal fibronectin test

obstetric ultrasonography:	Nuchal scan

antenatal testing:	Fetal movement counting Contraction stress test Nonstress test Vibroacoustic stimulation Biophysical profile Amniotic fluid index

Intervention

Delivery

Vaginal delivery

Induction	Artificial rupture of membranes Episiotomy Symphysiotomy Forceps in childbirth Ventouse in childbirth Odón Device

Dystocia management	McRoberts maneuver Woods' screw maneuver Zavanelli maneuver

Third stage of labor	Manual placenta removal

Caesarean section

Postpartum hemorrhage

Pregnancy and childbirth

Planning

Conception

Testing

Prenatal

Anatomy	Amniotic fluid Amniotic sac Endometrium Placenta

Development	Fundal height Gestational age Human embryogenesis Maternal physiological changes

Care	Nutrition Environmental toxicants In pregnancy Prenatal Concomitant conditions Diabetes mellitus SLE Sexual activity during pregnancy

Procedures	Amniocentesis Cardiotocography Chorionic villus sampling Nonstress test Abortion

Childbirth

Preparation	Adaptation to extrauterine life Bradley method Hypnobirthing Lamaze Nesting instinct

Roles	Doula Men's roles Midwife Obstetrician Perinatal nurse

Delivery	Bloody show Childbirth positions Home birth Multiple birth Natural childbirth Pelvimetry / Bishop score Cervical dilation Cervical effacement Position Presentation Breech Cephalic Shoulder Rupture of membranes Unassisted childbirth Uterine contraction Water birth

Postpartum

Obstetric history

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