title: Nonstress testing at ≤ 32.0 weeks' gestation: a randomized trial comparing different assessment criteria.
abstract: OBJECTIVE
  Comparison of time and outcomes of National Institutes of Child Health and Human Development defined fetal heart rate acceleration criteria at ≤ 32 weeks (≥ 10 beats/min, ≥ 10 seconds) compared with standard criteria (≥ 15 beats/min, ≥ 15 seconds).
  
  
  METHODS
  Singleton high-risk pregnancies that were referred for nonstress testing at ≤ 32 weeks' gestation were randomly assigned to 15 × 15 or 10 × 10 criteria. Data included nonstress test information, maternal data, and outcomes.
  
  
  RESULTS
  One hundred forty-three women were randomly assigned to 15 × 15 (n = 71) or 10 × 10 (n = 72). The groups were similar in maternal and pregnancy characteristics. Median time to reactive nonstress testing was shorter in the 10 × 10 group (37.3 minutes) than the 15 × 15 group (41.3 minutes; P = .04). There were no serious adverse events.
  
  
  CONCLUSIONS
  The time to attain a reactive nonstress testing at ≤ 32 weeks' gestation was 4 minutes shorter when the 10 × 10 criteria were used. There were no adverse events related to use of 10 × 10 nonstress testing criteria.
authors.affiliation: Maternal Fetal Medicine Division, San Diego Perinatal Center and Children's Specialists of San Diego, San Diego, CA 92123, USA. Larry.Cousins@sharp.com
authors.forename: Larry M
authors.initials: LM
authors.lastname: Cousins
authors.forename: Debra M
authors.initials: DM
authors.lastname: Poeltler
authors.forename: Sue
authors.initials: S
authors.lastname: Faron
authors.forename: Val
authors.initials: V
authors.lastname: Catanzarite
authors.forename: Sean
authors.initials: S
authors.lastname: Daneshmand
authors.forename: Holly
authors.initials: H
authors.lastname: Casele
mesh_terms: D000328:Adult; D015148:Cardiotocography / Q000379:methods*; D005260:Female; D005316:Fetal Distress / Q000175:diagnosis*; D005865:Gestational Age; D006340:Heart Rate, Fetal / Q000502:physiology*; D006801:Humans; D011247:Pregnancy; D011263:Pregnancy Trimester, Third; D013997:Time Factors