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Question 6/51
The fetal heart rate baseline is
Correct Answer: B
Comprehensive and Detailed Explanation (From NCC C-EFM-Referenced Sources) The NCC C-EFM exam outline, along with AWHONN and Miller's Pocket Guide, define baseline fetal heart rate as the mean FHR rounded to increments of 5 bpm, measured over a 10-minute window, excluding:
* accelerations
* decelerations
* periods of marked variability
* any segments differing by >25 bpm
This aligns with ACOG, AWHONN, and Simpson's interpretation standards.
Option A is incorrect: the baseline is not documented as a 15-bpm range; it is documented as a single value (e.g., 140 bpm).
Option C is incorrect: the correct NCC/ACOG standardized normal baseline is 110-160 bpm, not 170.
Exact Extract Concepts Referenced:
- "Baseline is determined over a 10-minute period excluding periodic or episodic changes." (AWHONN FHR Principles)
- "Baseline is the mean FHR rounded to 5-bpm increments." (Miller's Pocket Guide)
- "Normal baseline is 110-160 bpm." (Simpson & Menihan; Creasy & Resnik)
* accelerations
* decelerations
* periods of marked variability
* any segments differing by >25 bpm
This aligns with ACOG, AWHONN, and Simpson's interpretation standards.
Option A is incorrect: the baseline is not documented as a 15-bpm range; it is documented as a single value (e.g., 140 bpm).
Option C is incorrect: the correct NCC/ACOG standardized normal baseline is 110-160 bpm, not 170.
Exact Extract Concepts Referenced:
- "Baseline is determined over a 10-minute period excluding periodic or episodic changes." (AWHONN FHR Principles)
- "Baseline is the mean FHR rounded to 5-bpm increments." (Miller's Pocket Guide)
- "Normal baseline is 110-160 bpm." (Simpson & Menihan; Creasy & Resnik)
- Question List (51q)
- Question 1: A reliable indicator of fetal oxygenation is fetal...
- Question 2: Prenatal diagnosis shows that a fetus has renal agenesis. Du...
- Question 3: Interventions to decrease uterine activity should take place...
- Question 4: A woman at 41-weeks gestation is being induced. She is 2 cm ...
- Question 5: A fetus displays a baseline heart rate of 125 beats per minu...
- Question 6: The fetal heart rate baseline is...
- Question 7: Maternal-fetal exchange during labor is diminished by:...
- Question 8: What is the appropriate interpretation of this tracing? (Exh...
- Question 9: When a difference in interpretation occurs over a non-emerge...
- Question 10: The duration of a contraction is best represented by which c...
- Question 11: Sustained fetal supraventricular tachycardia that goes untre...
- Question 12: A woman is being induced with oxytocin. The tracing shown is...
- Question 13: A pattern of recurrent variable decelerations would move fro...
- Question 14: A woman is admitted to labor and delivery with vaginal bleed...
- Question 15: A woman at 34-weeks gestation is in active labor after spont...
- Question 16: The ratio of oxyhemoglobin to the total amount of hemoglobin...
- Question 17: When R-R intervals are short, the fetal heart rate is...
- Question 18: The main reason intrauterine pressure catheters are placed i...
- Question 19: The baseline fetal heart rate decreases with gestational age...
- Question 20: Fetal heart rate variability results from normal variance in...
- Question 21: In documenting auscultation of the fetal heart rate, it is i...
- Question 22: In the event of recurrent variable decelerations with thick ...
- Question 23: A woman (G1, P0) at 41-weeks gestation presents to OB triage...
- Question 24: A fetal heart rate pattern shows no accelerations or deceler...
- Question 25: A woman at 38-weeks gestation is admitted to labor and deliv...
- Question 26: This patient received an epidural 15 minutes prior to the tr...
- Question 27: This tracing reflects (Exhibit)...
- Question 28: A woman at 39-weeks gestation is in early labor, 2-3 cm dila...
- Question 29: Maternal conditions of autoimmunity can result in fetal hear...
- Question 30: (Full question) Vibroacoustic stimulation (VAS) is a useful ...
- Question 31: When auscultating the fetal heart rate, the Doppler should b...
- Question 32: This fetal heart rate tracing represents: (Exhibit)...
- Question 33: Nonstress testing is used more frequently for antepartum tes...
- Question 34: Intrapartum asphyxia can be determined by:...
- Question 35: Based on the tracing shown, the first action should be to (E...
- Question 36: This tracing reflects: (Exhibit)...
- Question 37: The most common fetal heart rate pattern consistent with ute...
- Question 38: Maternal-fetal oxygen transfer takes place in the:...
- Question 39: The baseline fetal heart rate in this tracing is: (Exhibit)...
- Question 40: This fetal heart rate tracing is obtained upon the woman's a...
- Question 41: A woman in labor has been pushing for 4 hours. For the last ...
- Question 42: Usually, the duration of an early deceleration in comparison...
- Question 43: (Full question statement) This tracing is consistent with: (...
- Question 44: A woman at 39-weeks gestation is being induced. She has chro...
- Question 45: This fetal heart rate tracing is from a woman in the second ...
- Question 46: When documenting the occurrence of late decelerations in the...
- Question 47: A nulliparous woman at term presents with leaking fluid. Rup...
- Question 48: (Full question statement) The fetal heart rate tracing shown...
- Question 49: During amnioinfusion, the infusion should be stopped periodi...
- Question 50: Intermittent fetal heart rate auscultation for a low-risk, s...
- Question 51: When fetal arterial blood pressure increases, the barorecept...
