EFM Terminology (NICHD)

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Across
  1. 1. Variability with an amplitude range of > 25 bpm
  2. 3. Baseline rate of <110 bpm
  3. 5. More than 5 contractions in a 10-minute window segment, averaged over a 30 minute period
  4. 7. Visually apparent, smooth, sine wave-like undulating pattern in FHR baseline with cycle frequency of 3-5/minute that persists for >/= 20 minutes
  5. 8. Decelerations that are associated with a contraction
  6. 10. Deceleration that is visually apparent, usually symmetrical gradual decrease and return of FHR associated with a uterine contraction; nadir of the decel occurs at the same time as the peak of the contraction
  7. 11. Variability with an amplitude range that is undetectable
  8. 14. Fluctuations in the baseline FHR that are irregular in amplitude and frequency; visually quantified; excludes accels and decels
  9. 16. Variability with an amplitude range visually detectable but </= 5 bpm
  10. 18. Baseline rate between 110-160 bpm
  11. 19. Deceleration that is a visually apparent decrease in the FHR that is >/= 15 bpm; lasting >/= 2 minutes but </= 10 minutes
  12. 20. Deceleration that is visually apparent, usually symmetrical, gradual decrease and return to baseline; delayed in timing with the nadir of the decel occurring after the peak of the contraction
Down
  1. 2. Decelerations that are NOT associated with a contraction
  2. 4. Visually apparent abrupt increase in FHR
  3. 6. Variability with an amplitude range of 6-25 bpm
  4. 9. Deceleration that is visually apparent abrupt decrease in the FHR; decrease must be >/= 15 bpm, lasting >/= 15 seconds and < 2 minutes
  5. 12. Approximate mean FHR rounded to increments of 5 bpm during a 10-minute window excluding accels, decels & periods of marked variability
  6. 13. Baseline rate >160 bpm
  7. 15. Decelerations that occur with >/= 50% of contractions in any 20 minute window
  8. 17. Decelerations that occur with < 50% of contractions in any 20 minute window