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| Section | Objectives |
|---|---|
| Fetal Heart Rate Interpretation | - Accelerations and decelerations - Baseline rate and variability - Category I, II, and III tracing interpretation |
| Maternal and Fetal Complications | - High-risk obstetric conditions affecting fetal monitoring - Hypoxia and uteroplacental insufficiency |
| Uterine Activity | - Tachysystole and abnormal contraction patterns - Normal uterine contraction patterns |
| Intrapartum Assessment and Monitoring | - Risk assessment during labor - External and internal monitoring techniques |
| Fetal Physiology and Oxygenation | - Oxygen transport and acid-base balance - Fetal cardiovascular physiology |
| Intrauterine Resuscitation and Interventions | - Fluid management and medication adjustments - Maternal position changes and oxygen administration |
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問題 #105
Prenatal diagnosis shows that a fetus has renal agenesis. During delivery, what type of electronic fetal heart rate pattern is most likely to be seen due to a common complication associated with this syndrome?
答案：A
解題說明：
Comprehensive and Detailed Explanation From NCC-Aligned Sources:
Renal agenesis # severe oligohydramnios (due to absent fetal urine production).
Oligohydramnios causes:
* Cord compression
* Recurrent variable decelerations
* Possible prolonged decels from cord entrapment
This is one of the hallmark FHR complications in renal agenesis.
Why the other options are incorrect:
* A. Heart block - associated with maternal autoimmune antibodies, not renal anomalies.
* B. Late decelerations - associated with uteroplacental insufficiency, not fluid deficiency.
Correct answer: C. Variable decelerations.
References:NCC Physiology & Pattern Recognition; AWHONN FHMPP; Menihan; Simpson & Creehan; Creasy & Resnik.
問題 #106
A characteristic of early decelerations is that they
答案：A
解題說明：
Comprehensive and Detailed Explanation From Exact Extract (No URLs or Links):
Early decelerations are defined in NCC and AWHONN resources as gradual, uniform decelerations that mirror uterine contractions and are associated with fetal head compression. AWHONN's Fetal Heart Monitoring Principles states: "Early decelerations are a benign pattern caused by vagal stimulation secondary to fetal head compression." Menihan similarly notes: "The mechanism of early decelerations is a vagal reflex response; they do not reflect hypoxia." They are periodic, not episodic, because they occur with contractions-which rules out option A.
They typically remain within a normal heart rate range and do not usually fall below 100 bpm; this eliminates option C. NCC Candidate Guide emphasizes that early decelerations are considered a normal physiologic response, not a pathologic pattern, and are categorized as "Category I" when variability is present.
Thus, the correct characteristic is that they are caused by a vagal reflex, making B the correct answer.
References:AWHONN Fetal Heart Monitoring ProgramMenihan: Electronic Fetal MonitoringSimpson & Creasy: Fetal PhysiologyNCC C-EFM Content Domains - Physiology
問題 #107
A patient presents at 38-weeks gestation with complaints of decreased fetal movement and ruptured membranes. The fetal heart rate is not able to be determined with an external ultrasound monitor. A spiral electrode is placed, and the tracing shows a rate of 90 bpm. What is the next most appropriate action?
答案：C
解題說明：
Comprehensive and Detailed Explanation From Exact Extract-Based NCC C-EFM References:
Whenever a fetal heart rate is unexpectedly low (such as 90 bpm), the FIRST step per NCC and AWHONN is to confirm that the signal is fetal, not maternal.
Even internal spiral electrodes can capture maternal heart rate, especially after:
* Rupture of membranes
* Maternal hypotension
* Maternal dehydration
* Maternal tachycardia or bradycardia
Thus, the first, most immediate action is:
# Palpate the maternal radial pulse to determine whether the tracing is maternal or fetal.
If rates match # the monitor is falsely detecting the maternal pulse.
If rates differ # confirm true fetal bradycardia and begin intrauterine resuscitation.
Why the other options are incorrect:
* A. Intrauterine resuscitation - should NOT begin before confirming the tracing is fetal.
* C. Bedside ultrasound - appropriate after confirming that the tracing is not maternal, not before.
Correct answer: B. Palpation of the maternal radial pulse.
References:NCC C-EFM Candidate Guide; AWHONN FHMPP; Menihan; Miller's Pocket Guide; Simpson
& Creehan.
問題 #108
A 30-minute tracing with moderate variability, accelerations, and one variable deceleration would be classified as:
答案：B
解題說明：
Comprehensive and Detailed Explanation From NCC-Aligned Sources:
NICHD/NCC criteria:
Category I must have ALL of the following:
* Baseline 110-160 bpm
* Moderate variability
* No late or variable decelerations
* Early decelerations may be present or absent
* Accelerations may be present or absent
Because this tracing has one variable deceleration, it fails Category I criterion ("no late or variable decelerations").
Category III requires:
* Absent variability with recurrent late decels, recurrent variables, or bradycardia, or
* Sinusoidal pattern
Those findings are not present.
Therefore, any tracing that:
* Has moderate variability and accelerations,
* But includes a variable deceleration, and
* Does not meet Category III criteria
...falls into the Category II (indeterminate) group.
Correct classification: B. Category II.
References:NCC C-EFM Candidate Guide; NICHD Three-Tier FHR Interpretation System; AWHONN FHMPP; Menihan; Simpson & Creehan.
問題 #109
Intermittent fetal heart rate auscultation for a low-risk, spontaneous laboring patient who is 4-5 centimeters dilated should be assessed at intervals every
答案：A
解題說明：
Comprehensive and Detailed Explanation From Exact Extract (No URLs or Links) NCC aligns with AWHONN's "Practice Guidelines for Fetal Heart Monitoring", which specify the appropriate frequency of intermittent auscultation (IA) based on labor phase and risk level. For low- risk patients in active labor, IA must occur:
* Every 15-30 minutes during active labor
* Every 5 minutes during second stage with pushing
AWHONN and Menihan emphasize that intermittent auscultation must follow standardized time intervals to ensure adequate fetal surveillance. These intervals reflect the physiologic understanding that fetal compromise may evolve over relatively short time periods, and active labor (4-7 cm dilation) represents a time of increasing stress on fetal oxygenation.
Simpson & Creehan explain that IA frequency should increase as labor intensifies, and that the 15-30- minute interval is the nationally recognized standard for low-risk active labor. NCC's exam content domain "Fetal Assessment Methods" reinforces knowing these surveillance intervals for safe low- intervention care.
Thus, for a 4-5 cm dilated, low-risk, spontaneous labor, the correct IA interval is every 15-30 minutes.
References (No URLs)
* NCC C-EFM Candidate Guide 2025 - Fetal Assessment Methods
* AWHONN Practice Guidelines for Fetal Heart Monitoring, 2022-2024
* Menihan: Electronic Fetal Monitoring
* Simpson & Creehan: Perinatal Nursing
* Miller: Fetal Monitoring Pocket Guide
問題 #110
......
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