Certification in Electronic Fetal Monitoring (C-EFM) Exam — Questions and Answers

Question 1: Which of the following intrauterine resuscitation techniques is specifically indicated for the management of recurrent variable decelerations believed to be caused by umbilical cord compression?

Administration of a 500 mL IV fluid bolus of lactated Ringer's.
Discontinuation of oxytocin infusion.
Application of 10 L/min of oxygen via a non-rebreather mask.
Instillation of warmed normal saline via an intrauterine pressure catheter (Amnioinfusion). (Correct answer)

Correct answer: Instillation of warmed normal saline via an intrauterine pressure catheter (Amnioinfusion).

Amnioinfusion is the instillation of fluid into the uterine cavity to supplement amniotic fluid volume. This is primarily performed to cushion the umbilical cord, thereby relieving the compression that is the underlying cause of recurrent variable decelerations.

Question 2: Which of the following is not considered a Category 3 fetal tracing?

Recurrent late decelerations with minimal variability (Correct answer)
A prolonged deceleration with absent variability
A sinusoidal pattern
Recurrent variable decelerations with absent variability

Correct answer: Recurrent late decelerations with minimal variability

Explanation: Absent fetal heart rate variability is required for Category 3 tracings. Late decelerations with minimal variability is still Category 2.

Question 3: A clinician is reviewing a 10-minute electronic fetal monitoring strip. For 7 minutes, the tracing is obscured by artifact. In the remaining 3 minutes, there are two separate 90-second segments of stable heart rate at 140-145 bpm without significant periodic changes. How should the baseline FHR be documented?

Normal
Indeterminate
140 bpm
145 bpm (Correct answer)

Correct answer: 145 bpm

To determine the baseline, there must be at least 2 minutes (120 seconds) of identifiable baseline segments in a 10-minute window. In this scenario, there are two 90-second segments, totaling 180 seconds (3 minutes) of identifiable baseline. The mean FHR is approximated to the nearest 5 bpm increment. Since the rate is stable at 140-145 bpm, it would be rounded to 145 bpm.

Question 4: When a cesarean birth is performed for a non-reassuring fetal status, the 'decision-to-incision' time should ideally be documented within:

15 minutes
30 minutes per ACOG guidelines (Correct answer)
No specific standard exists
60 minutes

Correct answer: 30 minutes per ACOG guidelines

ACOG guidelines recommend a decision-to-incision interval of 30 minutes or less for urgent cesarean birth to minimize fetal compromise.

Question 5: Which of the following is a recognized contraindication for performing fetal scalp stimulation?

Gestational age of 40 weeks
Presence of moderate variability
Cephalic presentation
Maternal active genital herpes infection (Correct answer)

Correct answer: Maternal active genital herpes infection

Fetal scalp stimulation is contraindicated in the presence of maternal infections that can be transmitted to the fetus through a break in the skin, such as active genital herpes or HIV. Other contraindications include significant prematurity, placenta previa, and fetal bleeding disorders. Moderate variability and a term, cephalic fetus are normal findings and not contraindications.

Question 6: Fetal hypoxia is defined as:

Decreased fetal cardiac output
Insufficient glucose delivery to fetal tissues
Inadequate oxygen delivery to fetal tissues (Correct answer)
Excessive CO2 accumulation in fetal blood

Correct answer: Inadequate oxygen delivery to fetal tissues

Fetal hypoxia is defined as inadequate oxygen delivery to fetal tissues, which can lead to anaerobic metabolism and acidosis if prolonged.

Question 7: When documenting fetal heart rate accelerations, which detail is required to meet the standard NICHD definition in a term fetus?

Peak ≥15 bpm above baseline lasting ≥15 seconds (Correct answer)
Any visible increase in FHR above the baseline
Peak ≥20 bpm above baseline lasting ≥30 seconds
Peak ≥10 bpm above baseline lasting ≥10 seconds

Correct answer: Peak ≥15 bpm above baseline lasting ≥15 seconds

In a term fetus, an acceleration is defined by NICHD as a peak of at least 15 bpm above baseline with a duration of at least 15 seconds.

Question 8: Which of the following represents a critical element of legally defensible charting related to a non-reassuring (Category II or III) fetal heart rate tracing?

Using subjective phrases such as "fetus appears stressed" to convey urgency.
Charting a summary of events at the end of the shift to ensure a complete narrative.
Noting only the provider notification time without detailing the content of the conversation.
Documenting the specific actions taken in response to the tracing and the subsequent fetal response. (Correct answer)

Correct answer: Documenting the specific actions taken in response to the tracing and the subsequent fetal response.

Legally sound documentation must be objective, timely, and complete. For a non-reassuring tracing, it is essential to document not only the interpretation of the FHR pattern but also the specific interventions performed (e.g., position change, IV fluid bolus), all notifications made to the provider, and the subsequent fetal response to those interventions. This creates a clear record of assessment, action, and re-evaluation, which is a cornerstone of legal defense.

Question 9: Management of a prolonged deceleration should include which of the following:

Assessment of uterine contractions
All of the above (Correct answer)
Cervical examination
Maternal position change
Assessment of maternal vital signs

Correct answer: All of the above

Explanation: Management of a prolonged deceleration typically involves a multifaceted approach, including maternal position change, assessment of uterine contractions, evaluation of maternal vital signs, and occasionally, a cervical examination to assess for potential causes or progress of labor.

Question 10: Which fetal blood vessel carries oxygenated blood FROM the placenta TO the fetus?

Ductus arteriosus
Umbilical vein (Correct answer)
Ductus venosus
Umbilical artery

Correct answer: Umbilical vein

The umbilical vein carries oxygenated, nutrient-rich blood from the placenta to the fetus.

Question 11: How long must EFM paper strips be retained per standard US hospital accreditation requirements?

Only until the patient is discharged
For a minimum of 30 days post-delivery
As part of the permanent medical record per state law, typically 7–10 years or longer (Correct answer)
Until the infant reaches age 18, in all states

Correct answer: As part of the permanent medical record per state law, typically 7–10 years or longer

EFM strips are part of the legal medical record and must be retained according to state law, commonly 7–10 years, though some states require retention until the child's majority.

Question 12: Amnioinfusion is an appropriate intervention for which of the following clinical scenarios?

Recurrent late decelerations with minimal variability
A sinusoidal fetal heart rate pattern
Recurrent severe variable decelerations (Correct answer)
Fetal tachycardia greater than 170 bpm

Correct answer: Recurrent severe variable decelerations

Amnioinfusion involves instilling a sterile, warmed isotonic fluid into the uterine cavity. Its primary indication is to relieve recurrent variable decelerations caused by umbilical cord compression, as the fluid provides cushioning. It is not indicated for late decelerations, tachycardia, or sinusoidal patterns, which are related to uteroplacental insufficiency or severe fetal anemia.

Question 13: Which of the following would NOT be included when determining the baseline fetal heart rate?

Periods of marked variability (Correct answer)
Segments between uterine contractions
Segments where the FHR is stable
Periods of minimal variability

Correct answer: Periods of marked variability

The baseline fetal heart rate is the mean FHR rounded to increments of 5 bpm during a 10-minute segment, EXCLUDING accelerations, decelerations, and periods of marked variability (>25 bpm amplitude). Segments with minimal or moderate variability between periodic changes are used to determine the baseline.

Question 14: A fetal heart rate deceleration begins at a baseline of 130 bpm, drops to 80 bpm, and lasts for 4 minutes before returning to the previous baseline. According to NICHD guidelines, how should this event be classified?

A severe variable deceleration
A recurrent late deceleration
A new baseline of bradycardia
A prolonged deceleration (Correct answer)

Correct answer: A prolonged deceleration

A prolonged deceleration is defined as a decrease in the FHR from the baseline of at least 15 bpm, lasting for at least 2 minutes but less than 10 minutes. A deceleration lasting 10 minutes or more is considered a baseline change. [1, 7, 21]

Question 15: In a patient with a prior cesarean birth monitored with EFM during a trial of labor (TOLAC), which pattern most specifically raises concern for uterine scar dehiscence?

Mild variable decelerations during pushing
Loss of accelerations in the third trimester
Sudden onset of late or prolonged decelerations in a previously reassuring tracing (Correct answer)
Gradual increase in baseline from 130 to 145 bpm

Correct answer: Sudden onset of late or prolonged decelerations in a previously reassuring tracing

A sudden change to non-reassuring FHR patterns in a TOLAC patient should raise immediate suspicion for scar dehiscence or rupture disrupting fetal circulation.

Question 16: For a plaintiff to successfully prove negligence in a lawsuit related to fetal monitoring, they must establish four key elements. A nurse correctly identifies a Category III tracing but fails to notify the provider in a timely manner, which is alleged to have caused a hypoxic injury. The failure to notify the provider represents which element of negligence?

Causation
Duty
Damages
Breach of Duty (Correct answer)

Correct answer: Breach of Duty

In this scenario, the nurse had a 'duty' to monitor the patient and report findings. The failure to notify the provider in a timely manner about a critical finding (Category III tracing) constitutes a 'breach of that duty.' This breach is the specific action (or inaction) that falls below the accepted standard of care. Causation links this breach to the 'damages' (the hypoxic injury).

Question 17: Which of the following components of the maternal-fetal unit carries the most oxygenated blood?

Fetal umbilical vein (Correct answer)
Fetal umbilical artery
Maternal uterine vein
Maternal uterine artery

Correct answer: Fetal umbilical vein

The fetal umbilical vein is responsible for carrying oxygenated and nutrient-rich blood from the placenta to the fetus. In contrast, the fetal umbilical arteries carry deoxygenated blood and waste products away from the fetus to the placenta. The maternal uterine artery brings oxygenated blood to the placenta, but the exchange process means the blood in the umbilical vein, post-oxygenation, is the most oxygen-rich blood destined for the fetus.

Question 18: Which of the following is not a possible cause of the tachycardia seen in the last tracing?

Maternal fever
Fetal heart block (Correct answer)
Sympathomimetic drugs
Maternal hyperthyroidism
Fetal sepsis

Correct answer: Fetal heart block

Explanation: Fetal heart block is not typically associated with tachycardia; instead, it often presents with bradycardia. Tachycardia in electronic fetal monitoring can be caused by maternal fever, sympathomimetic drugs, maternal hyperthyroidism, and fetal sepsis, among other factors.

Question 19: Which of the following interventions or conditions is LEAST likely to cause a decrease in or absence of fetal heart rate variability?

Fetal acoustic stimulation (Correct answer)
Administration of magnesium sulfate
Fetal sleep state
Administration of narcotic analgesics

Correct answer: Fetal acoustic stimulation

Fetal acoustic stimulation is a method used to elicit an acceleration in the fetal heart rate, which demonstrates fetal well-being. It is intended to stimulate the fetus, often increasing activity and variability, not decrease it. In contrast, medications like magnesium sulfate and narcotics, as well as normal fetal sleep cycles, are all well-known causes of decreased or minimal FHR variability.

Question 20: Are contractions present?

None
Tachysystole
Irritability
Regular (Correct answer)
Occasional

Correct answer: Regular

Explanation: Regular contractions are present.

Question 21: In a preterm fetus at 28 weeks gestation, which FHR characteristic differs from a term fetus and must be considered during EFM interpretation?

Accelerations must meet the same 15×15 criteria as a term fetus
Late decelerations are expected and acceptable
Higher baseline heart rate and less pronounced variability are normal for gestational age (Correct answer)
Bradycardia below 100 bpm is normal before 30 weeks

Correct answer: Higher baseline heart rate and less pronounced variability are normal for gestational age

Preterm fetuses normally have higher baseline heart rates and less variability due to immature autonomic nervous system development, requiring gestational-age-adjusted interpretation.

Question 22: A laboring patient with an EFM tracing showing recurrent late decelerations and minimal variability is placed in a left lateral position. What is the primary physiological goal of this intervention?

To stimulate a fetal vagal response and lower the heart rate.
To dislodge the fetal head from the pelvis.
To alleviate direct compression of the umbilical cord.
To increase maternal cardiac output and improve uteroplacental perfusion. (Correct answer)

Correct answer: To increase maternal cardiac output and improve uteroplacental perfusion.

Placing the patient in a lateral position, particularly the left lateral, displaces the gravid uterus off the inferior vena cava and aorta. This action increases venous return to the heart, boosts maternal cardiac output, and consequently improves blood flow to the placenta, which helps to correct the uteroplacental insufficiency indicated by late decelerations.

Question 23: Which of the following describes the criteria of an acceleration after 32 weeks gestation?

A rise in the fetal heart rate of at least 15 bpm for at least 15 seconds (Correct answer)
A rise in the fetal heart rate of at least 15 bpm for at least 10 seconds
A rise in the fetal heart rate of at least 10 bpm for at least 10 seconds
A rise in the fetal heart rate of at least 10 bpm for at least 15 seconds

Correct answer: A rise in the fetal heart rate of at least 15 bpm for at least 15 seconds

Explanation: Accelerations in fetal heart rate after 32 weeks gestation are defined by an increase in the fetal heart rate of at least 15 beats per minute (bpm) above the baseline, lasting for at least 15 seconds. This criteria indicates fetal well-being and is considered reassuring during electronic fetal monitoring.

Question 24: How frequently should EFM strip assessments be documented during active labor in a low-risk patient per AWHONN guidelines?

Every hour
Every 15 minutes (Correct answer)
Every 5 minutes
Every 30 minutes

Correct answer: Every 15 minutes

AWHONN recommends documenting EFM assessments every 15 minutes during active labor for low-risk patients to ensure timely identification of changes.

Question 25: A laboring patient's EFM tracing displays an undulating, smooth, sine wave-like pattern with a frequency of 3-5 cycles per minute and an amplitude of 5-15 bpm that has persisted for 20 minutes. What condition is most commonly associated with this ominous pattern?

Fetal hiccups
Fetal cardiac arrhythmia
Maternal sedation
Severe fetal anemia (Correct answer)

Correct answer: Severe fetal anemia

A true sinusoidal pattern is a rare and ominous finding. It is characterized by a smooth, sine wave-like pattern with a frequency of 3-5 cycles per minute, persisting for at least 20 minutes. This pattern is most commonly associated with severe fetal anemia, often from conditions like Rh isoimmunization or significant fetal hemorrhage.

Question 26: At birth, a clamped segment of the umbilical cord is collected for blood gas analysis. Which vessel provides the most accurate information regarding the fetal metabolic state at the time of delivery?

Maternal artery
Umbilical artery (Correct answer)
A single, mixed sample from the cord
Umbilical vein

Correct answer: Umbilical artery

The umbilical artery carries deoxygenated blood and metabolic waste products away from the fetus to the placenta. Therefore, its blood gas values most accurately reflect the fetal acid-base status at the moment of birth. The umbilical vein carries oxygenated blood from the placenta to the fetus and is more reflective of placental function.

Question 27: Which of the following is the single most important characteristic of the fetal heart rate that reliably predicts the absence of fetal metabolic acidemia at the time of observation?

Presence of accelerations
A baseline rate of 110-160 bpm
Presence of moderate variability (Correct answer)
Absence of decelerations

Correct answer: Presence of moderate variability

The presence of moderate variability (6-25 bpm) is highly predictive of a normal fetal acid-base status and the absence of significant fetal metabolic acidemia at that specific time. It reflects an intact central nervous system and adequate oxygenation. While a normal baseline, accelerations, and absence of decelerations are reassuring, moderate variability is considered the most reliable indicator of fetal well-being in this context.

Question 28: What is considered to be the normal range of fetal heart rates?

110-160 bpm (Correct answer)
120-160 bpm
100-150 bpm
120-170 bpm

Correct answer: 110-160 bpm

Explanation: The normal fetal heart ranges between 110 and 160 bpm.

Question 29: Which one of the following is usually associated with fetal head compression?

B
A (Correct answer)
C

Correct answer: A

Explanation: Early decelerations are associated with fetal head compression.

Question 30: What is considered the upper limit of normal for uterine resting tone as measured by an Intrauterine Pressure Catheter (IUPC) in a laboring patient?

5 mm Hg
25 mm Hg (Correct answer)
15 mm Hg
10 mm Hg

Correct answer: 25 mm Hg

Normal uterine resting tone during labor, measured by an IUPC, typically ranges from 5 to 25 mm Hg between contractions. A resting tone consistently above 20-25 mm Hg is considered elevated or uterine hypertonus, which can impair uteroplacental blood flow and fetal oxygenation.

Question 31: The threshold for significant metabolic acidemia in umbilical artery blood that is associated with risk of neonatal neurologic injury is a pH of:

< 7.25
< 7.00
< 7.10 (Correct answer)
< 7.20

Correct answer: < 7.10

An umbilical artery pH less than 7.10 is the widely accepted threshold for significant metabolic acidemia associated with increased risk of neonatal hypoxic-ischemic encephalopathy and adverse neurologic outcomes.

Question 32: When assessing uterine contraction intensity via manual palpation of the fundus, which finding corresponds to a 'strong' contraction?

The uterine wall cannot be easily indented by the examiner's fingertips. (Correct answer)
The uterine wall feels soft, like the tip of the nose.
The uterine wall feels firm, like the chin.
The uterine wall remains firm for more than 2 minutes.

Correct answer: The uterine wall cannot be easily indented by the examiner's fingertips.

The standard subjective measure for palpating contraction intensity compares the feel of the uterine fundus to parts of the face. A 'strong' contraction is one where the uterine wall is very firm and cannot be indented, similar to the feel of a forehead. 'Mild' is compared to the tip of the nose, and 'moderate' is compared to the chin. A contraction lasting over 2 minutes would be defined as tetanic or prolonged, which is a measure of duration, not intensity.

Question 33: The tocodynamometer is correctly placed on the maternal abdomen to measure uterine contractions. What aspect of uterine activity does this external device measure LEAST accurately?

Duration
Frequency
Resting tone
Intensity (Correct answer)

Correct answer: Intensity

The tocodynamometer (toco) is a pressure-sensitive device that measures the frequency and duration of uterine contractions with reasonable accuracy. However, it provides only a relative measure of contraction intensity because the reading is influenced by factors like maternal size, position, and belt tightness. An Intrauterine Pressure Catheter (IUPC) is required for an accurate quantitative measurement of intensity.

Question 34: While troubleshooting an erratic fetal heart rate tracing from a fetal scalp electrode (FSE), the nurse observes a regular, repeating artifact on the monitor strip that corresponds with a 60-cycle pattern. What is the most likely source of this interference?

Fetal hiccups
Maternal movement
Electrical interference from other equipment (Correct answer)
Improper FSE attachment

Correct answer: Electrical interference from other equipment

A 60-cycle (or 50-cycle, depending on the region's power standard) artifact is a classic sign of electrical interference. This can be caused by other electrical devices in the room, poor grounding of the fetal monitor, or faulty cables. It creates a very regular, sawtooth-like pattern on the tracing that is distinct from physiological signals.

Question 35: For a patient in active labor with chorioamnionitis, which combination of EFM findings would MOST raise concern for fetal compromise?

Fetal tachycardia with minimal variability and late decelerations (Correct answer)
Early decelerations only with normal baseline
Mild variable decelerations with quick recovery and moderate variability
Fetal tachycardia with moderate variability and accelerations

Correct answer: Fetal tachycardia with minimal variability and late decelerations

Chorioamnionitis causes fetal tachycardia from infection and fever, and when combined with minimal variability and late decelerations, it suggests fetal inflammatory compromise and possible acidemia.

Question 36: A nurse performs a position change, administers IV fluid bolus, and applies oxygen in response to late decelerations. In what order should these interventions appear in documentation?

In the order they were performed, with the fetal heart rate response after each (Correct answer)
Most important intervention first regardless of order performed
Alphabetically for clarity
After the physician has reviewed the chart

Correct answer: In the order they were performed, with the fetal heart rate response after each

Documenting interventions in the order performed with corresponding fetal responses creates an accurate timeline and demonstrates cause-and-effect clinical reasoning.

Question 37: An elevated fetal PCO2 in cord blood gas analysis most directly indicates:

Fetal sepsis
Anaerobic metabolism
Bicarbonate depletion
Impaired CO2 clearance across the placenta (Correct answer)

Correct answer: Impaired CO2 clearance across the placenta

Elevated PCO2 indicates that CO2 produced by fetal metabolism is not being adequately cleared by the placenta, typically due to acute uteroplacental insufficiency or cord compression.

Question 38: In fetal cord blood gas analysis, which value best reflects fetal metabolic status?

Base deficit (Correct answer)
PCO2
pH alone
PO2

Correct answer: Base deficit

Base deficit best reflects the degree of metabolic acidosis because it measures the amount of buffer (bicarbonate) consumed, independent of respiratory changes.

Question 39: Describe the variability.

Moderate
Marked (Correct answer)
Minimill
Absent

Correct answer: Marked

Explanation: Marked variability is 25 bpm or more of fluctuation around the baseline.

Question 40: The primary purpose of administering an intravenous (IV) fluid bolus of an isotonic solution during intrauterine resuscitation is to:

Decrease the intensity of uterine contractions.
Increase maternal intravascular volume to improve placental perfusion. (Correct answer)
Dilute meconium in the amniotic fluid.
Correct fetal dehydration.

Correct answer: Increase maternal intravascular volume to improve placental perfusion.

An IV fluid bolus, typically with a solution like Lactated Ringer's or Normal Saline, expands the mother's intravascular fluid volume. This action can help correct relative or absolute hypovolemia (e.g., from dehydration or epidural-induced vasodilation), thereby increasing maternal blood pressure and improving blood flow through the uterine arteries to the placenta.

Question 41: A clinician has classified a fetal heart rate tracing as Category II. Which of the following findings, on its own, would be consistent with this classification?

Absent variability with recurrent variable decelerations
Moderate variability with no decelerations
Sinusoidal pattern
Marked variability (Correct answer)

Correct answer: Marked variability

Marked variability (amplitude range >25 bpm) is an example of a finding that places a tracing into Category II. Moderate variability with no decelerations is a feature of Category I. A sinusoidal pattern or absent variability with recurrent variable decelerations would classify the tracing as Category III.

Question 42: According to the 2008 NICHD guidelines, what is the minimum amount of identifiable baseline that must be present in a 10-minute window to determine the baseline fetal heart rate?

At least 1 minute, which must be contiguous.
At least 5 minutes, which must be contiguous.
The entire 10-minute segment must be stable.
At least 2 minutes, which do not need to be contiguous. (Correct answer)

Correct answer: At least 2 minutes, which do not need to be contiguous.

The National Institute of Child Health and Human Development (NICHD) guidelines specify that the baseline fetal heart rate is determined over a 10-minute window. To establish the baseline, there must be at least 2 minutes of identifiable baseline segments. These segments do not need to be continuous. If this minimum cannot be identified, the baseline is considered indeterminate.

Question 43: What category is this tracing?

Category 1
Category 2 (Correct answer)
Category 3

Correct answer: Category 2

Explanation: It is Category 2 tracing. Category 2 tracing in Electronic Fetal Monitoring (EFM) represents an indeterminate or non-reassuring fetal heart rate pattern.

Question 44: Which of the following describes the signal processing function of an external fetal monitor when calculating the fetal heart rate from the Doppler ultrasound signal?

It directly measures the R-R interval of the fetal ECG.
It counts the number of uterine contractions over ten minutes.
It measures the electrical potential of the maternal abdominal muscles.
It uses autocorrelation to detect the periodic signal of the fetal heart. (Correct answer)

Correct answer: It uses autocorrelation to detect the periodic signal of the fetal heart.

The ultrasound transducer picks up many sounds from the maternal abdomen. The monitor's software uses a signal processing technique called autocorrelation. This method identifies the repetitive, periodic signal characteristic of the fetal heartbeat and calculates the rate, distinguishing it from other background noises and maternal signals.

Question 45: Fetal hemoglobin (HbF) differs from adult hemoglobin (HbA) in that HbF:

Has a lower affinity for oxygen
Carries less oxygen per molecule
Binds 2,3-DPG more effectively
Has a higher affinity for oxygen at any given PO2 (Correct answer)

Correct answer: Has a higher affinity for oxygen at any given PO2

Fetal hemoglobin has a higher oxygen affinity than adult hemoglobin because it binds 2,3-DPG less effectively, allowing more efficient oxygen extraction from maternal blood at the placenta.

Question 46: Which of the following FHR patterns is classified as a Category III tracing?

A prolonged deceleration lasting 4 minutes
Moderate variability with recurrent late decelerations
Absent variability with recurrent late decelerations (Correct answer)
Fetal tachycardia with minimal variability

Correct answer: Absent variability with recurrent late decelerations

A Category III tracing is defined by either a sinusoidal pattern OR absent baseline variability with recurrent late decelerations, recurrent variable decelerations, or bradycardia. The other options, while not normal, fall into the indeterminate Category II.

Question 47: Mixed acidosis in fetal cord blood gas analysis is characterized by:

Low pH, normal PCO2, and normal base deficit
Low pH with normal bicarbonate and normal PCO2
Low pH, elevated PCO2, and elevated base deficit (Correct answer)
Normal pH with elevated PCO2 only

Correct answer: Low pH, elevated PCO2, and elevated base deficit

Mixed acidosis has components of both respiratory (elevated PCO2) and metabolic (elevated base deficit) acidosis, indicating a more complex and often more serious acid-base disturbance.

Question 48: Metabolic acidosis in the fetus is primarily caused by:

Accumulation of lactic acid from anaerobic metabolism (Correct answer)
Decreased fetal respiratory rate
Acute hyperventilation by the mother
Elevated maternal PCO2 levels

Correct answer: Accumulation of lactic acid from anaerobic metabolism

When oxygen delivery is insufficient, the fetus shifts to anaerobic metabolism, producing lactic acid that accumulates and causes metabolic acidosis.

Question 49: A patient is in the second stage of labor, and the fetal monitor shows recurrent early decelerations. This pattern is most commonly associated with which physiological event?

Uteroplacental insufficiency
Umbilical cord compression
Fetal head compression (Correct answer)
Fetal metabolic acidosis

Correct answer: Fetal head compression

Early decelerations are benign patterns caused by a vagal response to fetal head compression as the fetus descends through the birth canal. The pressure on the fetal skull alters cerebral blood flow, stimulating the vagus nerve and causing a gradual, uniform slowing of the heart rate that mirrors the contraction. The onset, nadir, and recovery of the deceleration coincide with the beginning, peak, and end of the contraction, respectively.

Question 50: What is the primary goal of classifying a fetal heart rate tracing into one of the three tiers?

To determine the precise timing for an amnioinfusion.
To predict the exact Apgar scores at birth.
To provide a standardized framework for communication and guide clinical action based on the predicted fetal acid-base status. (Correct answer)
To diagnose the specific cause of fetal distress.

Correct answer: To provide a standardized framework for communication and guide clinical action based on the predicted fetal acid-base status.

The three-tier system is designed to standardize the interpretation and communication of FHR patterns. Each category is predictive of the fetal acid-base status at the time of observation, which helps guide clinical management, such as continued observation (Category I), further evaluation and intrauterine resuscitation (Category II), or prompt intervention (Category III).

Question 51: A nurse observes a change in the fetal heart rate variability from moderate to absent on the EFM tracing, which persists despite intrauterine resuscitation measures. This change is most concerning for the development of which fetal condition?

Fetal metabolic acidemia (Correct answer)
Compensated respiratory acidemia
Transient fetal hypoxemia
Fetal metabolic alkalosis

Correct answer: Fetal metabolic acidemia

Persistent absent variability is a non-reassuring sign that is strongly associated with fetal metabolic acidemia. The acidemia depresses the fetal central nervous system (CNS), leading to the loss of the normal push-and-pull effect of the sympathetic and parasympathetic nervous systems, which creates variability. Transient hypoxemia might cause minimal or marked variability initially, but persistent absent variability suggests a more severe, decompensated state.

Question 52: A laboring patient with a high BMI is having frequent periods of fetal heart rate signal loss with an external ultrasound transducer. Which of the following actions is MOST appropriate to obtain a more accurate and continuous fetal heart rate tracing?

Reposition the patient onto her left side.
Increase the amount of ultrasound gel and readjust the belt.
Apply a fetal scalp electrode (FSE), assuming there are no contraindications. (Correct answer)
Administer a fluid bolus to the mother.

Correct answer: Apply a fetal scalp electrode (FSE), assuming there are no contraindications.

Internal fetal monitoring with a fetal scalp electrode (FSE) provides a more direct and accurate measurement of the fetal heart rate, bypassing subcutaneous tissue that can interfere with the ultrasound signal, which is common in patients with a high BMI. It is the most appropriate step when external monitoring is inadequate and a more precise tracing is required, provided the membranes are ruptured and no contraindications exist.

Question 53: An EFM tracing shows a baseline fetal heart rate of 140 bpm with an amplitude range of 2-3 bpm for the past 40 minutes. The patient denies receiving any recent medications. Which of the following is the most likely cause for this pattern?

Uteroplacental insufficiency
Maternal fever
Umbilical cord compression
Fetal sleep cycle (Correct answer)

Correct answer: Fetal sleep cycle

Minimal variability (amplitude range detectable but ≤5 bpm) that lasts for a limited time is often due to a normal fetal sleep cycle, which typically lasts 20-40 minutes. While other conditions like hypoxemia can cause minimal variability, a fetal sleep cycle is a common and benign cause for this specific duration without other non-reassuring signs. Maternal fever usually causes tachycardia, and cord compression or uteroplacental insufficiency would likely present with decelerations.

Question 54: During EFM of a patient with intrauterine growth restriction (IUGR), which finding suggests the fetus has exhausted its compensatory reserves?

Increased fetal movement with reactive non-stress test
Moderate variability with occasional accelerations
Absent or minimal baseline variability with repetitive late decelerations (Correct answer)
Early decelerations with normal baseline

Correct answer: Absent or minimal baseline variability with repetitive late decelerations

In IUGR, absent variability combined with repetitive late decelerations indicates a decompensated fetus with likely metabolic acidosis and diminished reserve.

Question 55: A laboring patient who received an epidural anesthetic rapidly develops hypotension. Which of the following fetal heart rate patterns is most likely to be observed as a direct result of this maternal change?

Early decelerations
Late decelerations (Correct answer)
Marked variability
Variable decelerations

Correct answer: Late decelerations

Maternal hypotension reduces blood flow to the uterus and placenta, a condition known as uteroplacental insufficiency. This decrease in perfusion leads to fetal hypoxia, which stimulates fetal chemoreceptors and results in a reflex slowing of the heart rate. Because this response is tied to the period of decreased oxygen delivery during a contraction, the deceleration's onset is delayed relative to the contraction's peak, which is characteristic of a late deceleration.

Question 56: Which action best demonstrates that a nurse used critical thinking when managing an abnormal FHR pattern, from a documentation standpoint?

Leaving the chart blank until the physician has reviewed it
Recording the assessment, differential considerations, interventions, and fetal response in a narrative note (Correct answer)
Documenting only after the shift ends
Placing a sticky note on the strip saying 'problem resolved'

Correct answer: Recording the assessment, differential considerations, interventions, and fetal response in a narrative note

A complete narrative note that includes assessment findings, clinical reasoning, interventions, and outcomes reflects professional nursing judgment and critical thinking.

Question 57: In EFM documentation, what does the term 'recurrent' decelerations mean?

Occurring at least once per hour
Occurring with ≥50% of uterine contractions in any 20-minute window (Correct answer)
Occurring only during the second stage of labor
Occurring three or more times in a row

Correct answer: Occurring with ≥50% of uterine contractions in any 20-minute window

NICHD defines recurrent decelerations as those occurring with 50% or more of uterine contractions within any 20-minute period.

Question 58: What is the appropriate next step if a prolonged deceleration persists after maternal position change?

Increasing intravenous fluids
Administering oxygen to the mother (Correct answer)
Immediate cesarean delivery
Cervical examination

Correct answer: Administering oxygen to the mother

Explanation: Administering oxygen to the mother can help improve oxygen delivery to the fetus and is a common intervention following a prolonged deceleration.

Question 59: Fetal baroreceptors, located in the aortic arch and carotid sinuses, are stimulated by changes in fetal blood pressure. What is the expected fetal heart rate response to a sudden increase in fetal arterial pressure?

A rapid slowing of the Fetal Heart Rate (Correct answer)
A decrease in FHR variability
The development of an acceleration
An increase in the FHR baseline

Correct answer: A rapid slowing of the Fetal Heart Rate

Baroreceptors are stretch receptors that respond to changes in blood pressure. An increase in fetal arterial pressure stretches these receptors, which then send signals via the vagus nerve to the fetal brain's cardioinhibitory center. This results in a rapid, reflexive slowing of the fetal heart rate as a compensatory mechanism.

Question 60: A laboring patient develops a fever of 101.8°F (38.8°C). Which EFM change is MOST directly expected as a result of maternal fever?

Fetal bradycardia
Sinusoidal pattern
Fetal tachycardia (Correct answer)
Decreased variability only, no rate change

Correct answer: Fetal tachycardia

Maternal fever elevates fetal metabolic rate and increases fetal heart rate through direct thermal and inflammatory mechanisms, resulting in tachycardia.

Question 61: A laboring patient's EFM tracing shows a pattern of two contractions occurring in rapid succession followed by a longer resting interval before the next pair. Which term best describes this uterine activity pattern?

Hypertonus
Uterine coupling (Correct answer)
Tachysystole
Uterine irritability

Correct answer: Uterine coupling

Uterine coupling is the term used to describe contractions that occur in pairs or doubles. This pattern involves two contractions with a short rest period in between, followed by a longer pause. While it can sometimes be associated with tachysystole if the overall number of contractions is high, the specific pattern described is best defined as coupling.

Question 62: For internal monitoring of uterine contractions, an Intrauterine Pressure Catheter (IUPC) is inserted. Which of the following is a prerequisite for its placement?

The patient must have an epidural in place.
The cervix must be fully dilated.
The fetus must be in a vertex presentation.
The amniotic membranes must be ruptured. (Correct answer)

Correct answer: The amniotic membranes must be ruptured.

An IUPC is a flexible catheter that is placed inside the uterine cavity, alongside the fetus, to directly measure the pressure generated by contractions. To insert the catheter into the uterus, the amniotic sac must be broken (ruptured membranes).

Question 63: A nurse is reviewing a 10-minute electronic fetal monitoring strip that shows seven contractions. According to NICHD guidelines, how should the uterine activity be characterized?

Uterine coupling
Normal uterine activity
Tachysystole (Correct answer)
Hypertonus

Correct answer: Tachysystole

According to the 2008 NICHD guidelines, tachysystole is defined as more than five contractions in a 10-minute window, averaged over a 30-minute period. Seven contractions in 10 minutes exceeds this threshold. Normal activity is five or fewer contractions. Uterine coupling refers to a specific pattern of paired contractions, and hypertonus refers to an elevated resting tone between contractions, which is not described.

Question 64: Are there decelerations present?

Early
None (Correct answer)
Prolonged
Late
Variable

Correct answer: None

Explanation: Decelerations are not present.

Question 65: Is this FHT reassuring?

It is overall reassuring, but not reactive. (Correct answer)
This tracing is not reassuring and requires intervention.
Yes. It is reassuring and reactive.

Correct answer: It is overall reassuring, but not reactive.

Explanation: The FHT is overall reassuring, but not reactive.

Question 66: During a uterine contraction, blood flow through the uterine spiral arteries temporarily decreases. What is the primary reason for this reduction in flow?

Fetal head compression against the cervix
Maternal anxiety causing systemic vasoconstriction
Maternal Valsalva maneuver during pushing
Increased intramyometrial pressure compressing the vessels (Correct answer)

Correct answer: Increased intramyometrial pressure compressing the vessels

Uterine contractions increase the pressure within the myometrium (intramyometrial pressure). This increased pressure compresses the spiral arteries that perfuse the intervillous space of the placenta. When the intramyometrial pressure exceeds the pressure within the arteries, blood flow is significantly reduced or even temporarily stopped, leading to a transient decrease in oxygen transfer to the fetus.

Question 67: When documenting a category II fetal heart rate tracing, what is the MOST important element to record?

The nurse's personal opinion of fetal status
The number of visitors in the room
Only the strip interpretation label
Interventions performed and fetal response (Correct answer)

Correct answer: Interventions performed and fetal response

Documenting the interventions performed and the fetal response demonstrates clinical action taken and establishes a clear record for continuity of care.

Question 68: A clinician performs vibroacoustic stimulation (VAS) on the maternal abdomen for a term fetus with a nonreactive non-stress test. What response on the EFM tracing would be considered reassuring?

An increase in FHR variability from moderate to marked
An acceleration of at least 15 bpm for 15 seconds (Correct answer)
The development of uterine tachysystole
A prolonged deceleration lasting 3 minutes

Correct answer: An acceleration of at least 15 bpm for 15 seconds

A reassuring response to vibroacoustic stimulation (VAS) is a fetal heart rate acceleration. For a fetus at or beyond 32 weeks gestation, this is defined as a visually apparent increase in the FHR of at least 15 beats per minute (bpm) above the baseline, lasting for at least 15 seconds. This response indicates an intact and non-acidotic central nervous system.

Question 69: A patient receiving oxytocin for labor augmentation develops uterine tachysystole (six contractions in 10 minutes) accompanied by recurrent late decelerations. What is the FIRST priority nursing intervention?

Increase the rate of the primary IV infusion.
Administer a subcutaneous dose of terbutaline.
Place the patient in a Trendelenburg position.
Discontinue the oxytocin infusion. (Correct answer)

Correct answer: Discontinue the oxytocin infusion.

The first and most critical intervention for uterine tachysystole caused by oxytocin is to stop the causative agent. Discontinuing the oxytocin infusion is the fastest way to begin reducing uterine activity and improve blood flow to the fetus, which can resolve the associated late decelerations. Other resuscitative measures may follow, but stopping the oxytocin is the priority.

Question 70: When monitoring a patient with gestational diabetes on EFM, which fetal heart rate concern is MOST associated with macrosomia and shoulder dystocia risk?

Prolonged second-stage decelerations indicating head compression with risk of cord entrapment at delivery (Correct answer)
Baseline tachycardia above 180 bpm throughout labor
Absence of accelerations in the first stage
Persistent sinusoidal pattern

Correct answer: Prolonged second-stage decelerations indicating head compression with risk of cord entrapment at delivery

In macrosomic fetuses, prolonged or severe decelerations during pushing can signal cord or head compression that may be compounded by shoulder dystocia at delivery.

Question 71: A normal umbilical artery bicarbonate (HCO3-) level at delivery is approximately:

12 – 16 mEq/L
22 – 26 mEq/L (Correct answer)
8 – 10 mEq/L
30 – 34 mEq/L

Correct answer: 22 – 26 mEq/L

Normal umbilical artery bicarbonate is approximately 22–26 mEq/L, reflecting adequate bicarbonate buffering capacity in the fetus at delivery.

Question 72: The bicarbonate buffer system in fetal blood primarily serves to:

Neutralize excess hydrogen ions produced by anaerobic metabolism (Correct answer)
Facilitate CO2 transport from fetus to placenta
Transport oxygen to fetal tissues
Regulate fetal blood glucose levels

Correct answer: Neutralize excess hydrogen ions produced by anaerobic metabolism

Bicarbonate is the primary extracellular buffer and neutralizes excess H+ ions from anaerobic metabolism, maintaining pH during periods of hypoxia.

Question 73: According to professional nursing standards, which statement best describes a primary responsibility of the perinatal nurse regarding EFM?

To adjust the monitor for a clear signal, but defer all FHR pattern interpretation to the provider.
To independently interpret the tracing, initiate appropriate initial interventions, and communicate findings to the provider. (Correct answer)
To make the final diagnosis of fetal acidemia and decide on the mode of delivery.
To obtain informed consent from the patient for an emergency cesarean delivery.

Correct answer: To independently interpret the tracing, initiate appropriate initial interventions, and communicate findings to the provider.

The perinatal nurse's scope of practice includes the ability to interpret EFM data, implement initial conservative corrective measures (intrauterine resuscitation), and effectively communicate assessments and concerns to the responsible provider. While the provider makes the ultimate diagnosis and directs definitive treatment, the nurse has an independent and critical role in surveillance, initial management, and timely communication.

Question 74: Which standardized language is preferred when documenting uterine contraction frequency on an EFM strip per NICHD guidelines?

Contractions occurring every X minutes, averaged over 30 minutes (Correct answer)
Contractions graded on a scale of 1–4
'Frequent' or 'infrequent' based on nurse judgment
'Mild,' 'moderate,' or 'strong' based on palpation only

Correct answer: Contractions occurring every X minutes, averaged over 30 minutes

NICHD recommends quantifying contraction frequency by counting contractions over a 30-minute window to provide objective, reproducible documentation.

Question 75: In a twin gestation monitored with EFM, what is a major challenge unique to dual fetal monitoring?

Signal cross-capture where one transducer picks up the other twin's heart rate (Correct answer)
The inability to detect uterine contractions with an external tocometer
Only twin A can be monitored electronically
Baseline FHR is always identical for both twins

Correct answer: Signal cross-capture where one transducer picks up the other twin's heart rate

Signal cross-capture (cross-channel interference) can cause one monitor to display the other twin's FHR, leading to misinterpretation of fetal status.

Question 76: A patient receiving terbutaline for uterine tachysystole develops a fetal heart rate baseline of 165-170 bpm. This change is most likely attributable to which of the following?

Maternal hypotension
Fetal sleep cycle
Increased vagal tone
Sympathomimetic effect of the medication (Correct answer)

Correct answer: Sympathomimetic effect of the medication

Terbutaline is a sympathomimetic drug (a beta-adrenergic agonist) that can cause maternal and subsequent fetal tachycardia as a side effect. Maternal hypotension and increased vagal tone would more likely cause bradycardia or decelerations. A fetal sleep cycle is typically associated with minimal variability and a stable baseline within the normal range, not tachycardia.

Question 77: Compared to umbilical artery blood, umbilical vein blood would normally show:

Lower pH and higher PCO2
Higher pH and lower PCO2 (Correct answer)
Same pH and lower PO2
Lower pH and lower PO2

Correct answer: Higher pH and lower PCO2

Umbilical vein blood returns from the placenta with higher pH and lower PCO2 because CO2 has been exchanged at the placenta and O2 has been loaded.

Question 78: A fetal heart rate tracing shows recurrent decelerations where the onset, nadir, and recovery are delayed relative to the beginning, peak, and end of the uterine contractions. This pattern is most indicative of which underlying condition?

Maternal supine position
Umbilical cord compression
Fetal head compression
Uteroplacental insufficiency (Correct answer)

Correct answer: Uteroplacental insufficiency

Late decelerations are characterized by a gradual decrease in the FHR with the nadir occurring after the peak of the contraction. This timing reflects a delayed fetal response to transient hypoxemia caused by reduced blood flow to the intervillous space during a contraction, which is the hallmark of uteroplacental insufficiency. [2, 3, 16]

Question 79: Which intervention is indicated if there is persistent fetal tachycardia on Electronic Fetal Monitoring?

Maternal hydration
Increasing intravenous fluids
Administering tocolytic medication
Immediate cesarean delivery (Correct answer)

Correct answer: Immediate cesarean delivery

Explanation: Persistent fetal tachycardia can indicate fetal distress, and immediate cesarean delivery may be necessary to prevent adverse outcomes.

Question 80: What is the baseline rate?

165
145
175
180
170 (Correct answer)

Correct answer: 170

Explanation: The baseline rate doesn't include areas of marked variability or accelerations or decelerations.

Question 81: A nurse is evaluating an electronic fetal monitoring (EFM) strip and notes the variability is consistently greater than 25 beats per minute (bpm) from the baseline. According to NICHD guidelines, how should this fetal heart rate variability be classified?

Moderate
Marked (Correct answer)
Absent
Minimal

Correct answer: Marked

According to the National Institute of Child Health and Human Development (NICHD) guidelines, fetal heart rate variability is classified as marked when the amplitude range from peak to trough is greater than 25 bpm. Moderate variability is 6-25 bpm, minimal is detectable but ≤5 bpm, and absent is an undetectable amplitude range.

Question 82: Cord blood gas sampling is most indicated when:

There are concerns about fetal well-being during labor or delivery (Correct answer)
All scheduled cesarean deliveries
Maternal fever above 38.0°C is present
Epidural analgesia is administered

Correct answer: There are concerns about fetal well-being during labor or delivery

Cord blood gases are indicated when there are concerns about fetal well-being (e.g., non-reassuring FHR pattern, low Apgar scores, meconium-stained fluid) to objectively assess fetal acid-base status at delivery.

Question 83: When using closed-loop communication during a fetal emergency, the person receiving an order should:

Silently confirm and proceed immediately without feedback
Repeat the order back aloud and receive confirmation before executing (Correct answer)
Write the order down and verify after the emergency
Delegate confirmation to the charge nurse

Correct answer: Repeat the order back aloud and receive confirmation before executing

Closed-loop communication requires the receiver to verbally repeat back the order so the sender can confirm accuracy before the action is taken.

Question 84: According to the 2008 NICHD guidelines, which of the following defines a fetal heart rate acceleration for a fetus at 34 weeks gestation?

A gradual increase of at least 15 bpm above baseline, lasting at least 15 seconds.
An abrupt increase of at least 10 bpm above baseline, lasting at least 10 seconds.
Any increase above baseline that lasts for more than 2 minutes.
An abrupt increase of at least 15 bpm above baseline, lasting at least 15 seconds but less than 2 minutes. (Correct answer)

Correct answer: An abrupt increase of at least 15 bpm above baseline, lasting at least 15 seconds but less than 2 minutes.

For a fetus at 32 weeks of gestation or greater, an acceleration is defined as a visually apparent abrupt increase (onset to peak <30 seconds) in the FHR from the baseline. The peak must be at least 15 bpm above the baseline, and the duration must be at least 15 seconds but less than 2 minutes from the onset to the return to baseline. [5, 7, 10]

Question 85: A laboring patient's EFM tracing shows a consistent fetal heart rate of 100 bpm for the past 12 minutes, accompanied by moderate variability. Which of the following is the most likely cause for this fetal heart rate pattern?

Maternal fever
Umbilical cord prolapse
Fetal arrhythmia
Post-term gestation with mature parasympathetic nervous system (Correct answer)

Correct answer: Post-term gestation with mature parasympathetic nervous system

Fetal bradycardia is a baseline FHR less than 110 bpm. In a post-term fetus, increased vagal tone due to a mature parasympathetic nervous system can cause the baseline rate to be at the lower end of normal or mildly bradycardic. The presence of moderate variability makes severe, acute hypoxia (as seen with a cord prolapse) less likely. Maternal fever typically causes tachycardia, and while an arrhythmia could be a cause, parasympathetic maturity is a more common physiological reason for this specific pattern in a term or post-term fetus.

Question 86: An EFM tracing shows a baseline FHR of 135 bpm, moderate variability, accelerations with fetal movement, and no decelerations. According to the NICHD three-tier system, how should this pattern be categorized?

Uninterpretable
Category III
Category II
Category I (Correct answer)

Correct answer: Category I

This fetal heart rate tracing includes a baseline of 135 bpm (normal is 110-160), moderate variability, and an absence of late or variable decelerations. These are all components of a Category I tracing, which is considered normal and strongly predictive of a normal fetal acid-base status.

Question 87: Which of the following is the primary purpose for measuring Montevideo Units (MVUs) with an Intrauterine Pressure Catheter (IUPC)?

To diagnose preterm labor
To calculate the frequency and duration of contractions
To determine the fetal response to contractions
To assess the adequacy of uterine power for labor progress (Correct answer)

Correct answer: To assess the adequacy of uterine power for labor progress

The primary clinical use for calculating Montevideo Units (MVUs) is to quantitatively assess the adequacy of uterine contractile power to determine if it is sufficient to produce cervical change and fetal descent during the active phase of labor. Generally, MVUs of 200 or more are considered adequate. While an IUPC helps assess frequency and duration, its unique function is the quantitative measurement of intensity, which is needed for the MVU calculation.

Question 88: Base excess (BE) in fetal cord blood is negative (base deficit) when:

Metabolic alkalosis is present
PCO2 is elevated above normal
Bicarbonate stores have been consumed by buffering excess acid (Correct answer)
Respiratory alkalosis is present

Correct answer: Bicarbonate stores have been consumed by buffering excess acid

A negative base excess (base deficit) indicates that bicarbonate stores have been depleted by buffering metabolic acids, reflecting prior metabolic stress.

Question 89: A base deficit greater than which value is considered significant for metabolic acidosis in the newborn?

4 mmol/L
16 mmol/L
12 mmol/L (Correct answer)
8 mmol/L

Correct answer: 12 mmol/L

A base deficit greater than 12 mmol/L in umbilical artery blood is the threshold associated with significant metabolic acidosis and potential neonatal morbidity.

Question 90: Which condition best describes fetal asphyxia?

Transient bradycardia without pH change
Mild respiratory acidosis corrected within minutes
Hypoxia with significant metabolic acidosis and risk of organ damage (Correct answer)
Elevated PCO2 with normal base deficit

Correct answer: Hypoxia with significant metabolic acidosis and risk of organ damage

Fetal asphyxia is a severe condition combining hypoxia with metabolic acidosis (significant base deficit) that places the fetus at risk for end-organ damage including brain injury.

Question 91: What is the primary purpose of the 'chain of command' in EFM-related clinical communication?

To escalate patient safety concerns when a provider does not respond appropriately (Correct answer)
To assign responsibility for charting the EFM strip
To document the hierarchy of nursing staff on the unit
To determine who places the external monitor

Correct answer: To escalate patient safety concerns when a provider does not respond appropriately

The chain of command exists to ensure patient safety by providing nurses a formal pathway to escalate concerns when initial communication with a provider is inadequate.

Question 92: Which communication framework is most recommended for reporting concerning fetal heart rate patterns to a provider in the US?

SBAR (Situation, Background, Assessment, Recommendation) (Correct answer)
SOAP (Subjective, Objective, Assessment, Plan)
CHART (Complaint, History, Assessment, Rx, Treatment)
PACE (Patient, Assessment, Complication, Evaluation)

Correct answer: SBAR (Situation, Background, Assessment, Recommendation)

SBAR is the standard structured communication tool recommended for reporting FHR concerns because it ensures complete, organized information transfer.

Question 93: How would you describe the contractions noted on this fetal tracing?

Irritability
Hyperstimulation
Tachysystole (Correct answer)
Tetany

Correct answer: Tachysystole

Explanation: Tachysystole describes contractions that occur with 5 or more in 10 minutes. The term hyperstimulation is no longer used.

Question 94: In a patient with poorly controlled asthma in labor, which EFM change may occur if the mother develops acute bronchospasm?

Immediate fetal bradycardia
No change in FHR since the placenta buffers maternal hypoxia completely
Sinusoidal pattern within minutes
Fetal tachycardia followed by decelerations if maternal hypoxia progresses (Correct answer)

Correct answer: Fetal tachycardia followed by decelerations if maternal hypoxia progresses

Maternal bronchospasm reduces maternal oxygen saturation, and if hypoxia progresses, it will decrease oxygen delivery to the fetus, initially causing tachycardia and later decelerations.

Question 95: An ultrasound transducer used for external fetal monitoring functions based on which technological principle?

Electrocautery
Bioelectrical impedance
Doppler effect (Correct answer)
Magnetic resonance imaging

Correct answer: Doppler effect

External fetal monitors use an ultrasound transducer that emits high-frequency sound waves and detects changes in their frequency as they reflect off the moving fetal heart structures. This phenomenon is known as the Doppler effect, which allows the machine to calculate and display the fetal heart rate.

Question 96: The normal umbilical vein pH at delivery is approximately:

7.20 – 7.28
7.32 – 7.43 (Correct answer)
7.45 – 7.55
7.10 – 7.18

Correct answer: 7.32 – 7.43

Normal umbilical vein pH is 7.32–7.43, reflecting oxygenated blood returning from the placenta with better acid-base status than umbilical artery blood.

Question 97: A series of accelerations are observed on a fetal monitoring strip that do not occur in conjunction with uterine contractions. These changes are best described as:

Reactive
Periodic
Cyclical
Episodic (Correct answer)

Correct answer: Episodic

The NICHD guidelines define periodic patterns as those associated with uterine contractions, while episodic patterns are those not associated with uterine contractions. Accelerations occurring independently of contractions are therefore classified as episodic. [4, 6, 21]

Question 98: A patient with polyhydramnios is being monitored with EFM. Which fetal heart rate concern is MOST associated with this condition?

Oligohydramnios-related cord compression
Cord prolapse causing sudden prolonged decelerations (Correct answer)
Fetal tachycardia due to increased fluid pressure
Chronic uteroplacental insufficiency

Correct answer: Cord prolapse causing sudden prolonged decelerations

Polyhydramnios increases the risk of cord prolapse, particularly with rupture of membranes, which would produce sudden and severe fetal heart rate decelerations.

Question 99: Which type of acidosis is characterized by an elevated PCO2 and normal base deficit in fetal cord blood?

Respiratory acidosis (Correct answer)
Lactic acidosis
Mixed acidosis
Metabolic acidosis

Correct answer: Respiratory acidosis

Respiratory acidosis results from acute CO2 accumulation (elevated PCO2) without significant base deficit, often due to transient cord compression.

Question 100: A nurse is concerned about a persistent Category II tracing with recurrent late decelerations. The attending physician was notified 30 minutes ago but has not come to the bedside or provided new orders. From a professional and legal standpoint, what is the nurse's most critical next action?

Administer a 500 mL IV fluid bolus and place the patient on her left side.
Document the current time and wait another 15 minutes for the physician to respond.
Initiate the established institutional chain of command. (Correct answer)
Ask a colleague for a second opinion on the fetal heart rate tracing.

Correct answer: Initiate the established institutional chain of command.

The nurse has a professional and legal duty to advocate for patient safety. When the primary provider is unresponsive or there is a disagreement on the plan of care for a concerning clinical situation, the nurse must activate the hospital's chain of command to escalate the concern to the next level of authority (e.g., charge nurse, unit manager, chief of obstetrics). This ensures the situation is addressed promptly and fulfills the nurse's advocacy role. While the other actions are relevant, they do not resolve the critical issue of an unresponsive provider.

Question 101: A patient at 41 weeks gestation is being monitored with EFM during oxytocin induction. Which pattern specifically increases risk in post-term fetuses?

Moderate variability indicating fetal reserve
Early decelerations from head compression
Accelerations confirming fetal well-being
Variable decelerations due to oligohydramnios increasing cord compression risk (Correct answer)

Correct answer: Variable decelerations due to oligohydramnios increasing cord compression risk

Post-term pregnancies are associated with oligohydramnios, which reduces the cushioning effect of amniotic fluid and increases the likelihood of umbilical cord compression causing variable decelerations.

Question 102: A patient has an intrauterine pressure catheter (IUPC) in place. Over a 10-minute period, there are four contractions. The peak pressures are 60, 65, 70, and 60 mm Hg, and the resting tone is 15 mm Hg. What are the calculated Montevideo Units (MVUs) for this period?

270 MVUs
200 MVUs (Correct answer)
195 MVUs
255 MVUs

Correct answer: 200 MVUs

Montevideo Units (MVUs) are calculated by summing the intensity of each contraction in a 10-minute window. Intensity is defined as the peak pressure minus the resting tone. Calculation: (60-15) + (65-15) + (70-15) + (60-15) = 45 + 50 + 55 + 45 = 200 MVUs. A value of 200 MVUs or greater is generally considered adequate for active labor progress.

Question 103: What is the likely cause of this fetal tracing?

Fetal anemia (Correct answer)
Fetal prematurity
Fetal arrhythmia
Maternal hypertension
Fetal neurological damage

Correct answer: Fetal anemia

Explanation: This is a sinusoidal pattern associated with severe fetal anemia.

Question 104: Which EFM pattern is classically associated with complete placental abruption?

Prolonged deceleration or sudden bradycardia with loss of variability (Correct answer)
Episodic accelerations with a high baseline
Recurrent early decelerations
Mild late decelerations with moderate variability

Correct answer: Prolonged deceleration or sudden bradycardia with loss of variability

Complete placental abruption causes sudden cessation of uteroplacental blood flow, producing a prolonged deceleration or sustained bradycardia with loss of variability.

Question 105: When caring for a laboring patient with a uterine rupture, which EFM finding typically occurs FIRST?

Gradual increase in baseline rate
A prolonged or sudden fetal bradycardia (Correct answer)
Sinusoidal pattern preceding rupture
Progressive loss of variability over hours

Correct answer: A prolonged or sudden fetal bradycardia

Uterine rupture often presents acutely with a sudden prolonged fetal bradycardia due to catastrophic disruption of uteroplacental circulation.

Question 106: Which term should be used in documentation when describing a fetal heart rate pattern that cannot be categorized as Category I or Category III?

Category II (Correct answer)
Non-reassuring
Suspicious
Indeterminate

Correct answer: Category II

The NICHD three-tier classification system uses 'Category II' for tracings that are neither normal (Category I) nor abnormal (Category III).

Question 107: Which one of the following is associated with uteroplacental insufficiency?

A
C
B (Correct answer)

Correct answer: B

Explanation: Late decelerations are associated uteroplacental insufficiency.

Question 108: Assuming the patient has an IUPC, please calculate the MVUs for this tracing.

245 (Correct answer)
300
220
280

Correct answer: 245

Explanation: The MVUs for this tracing would be 245.

Question 109: The normal lactate level in umbilical artery blood is approximately:

< 12 mmol/L
< 2 mmol/L
< 8 mmol/L
< 4.8 mmol/L (Correct answer)

Correct answer: < 4.8 mmol/L

Normal umbilical artery lactate is less than 4.8 mmol/L; values above this suggest significant anaerobic metabolism and fetal metabolic acidosis.

Question 110: In a patient receiving epidural anesthesia, which hemodynamic change most commonly affects the fetal heart rate tracing?

No fetal effect because the placenta filters anesthetic agents
Maternal hypotension causing late or prolonged decelerations (Correct answer)
Maternal hypertension causing fetal tachycardia
Maternal bradycardia causing fetal accelerations

Correct answer: Maternal hypotension causing late or prolonged decelerations

Epidural anesthesia can cause maternal hypotension due to sympathetic blockade, reducing uterine blood flow and causing late or prolonged fetal decelerations.

Question 111: Analysis of an umbilical artery cord blood gas sample yields the following results: pH 7.15, pCO2 70 mmHg, Base Deficit -4 mmol/L. How should these findings be interpreted?

Metabolic acidemia
Mixed acidemia
Respiratory acidemia (Correct answer)
Normal acid-base status

Correct answer: Respiratory acidemia

This blood gas shows a low pH (acidemia) and a high pCO2 (respiratory component), with a normal base deficit (no significant metabolic component). This combination is characteristic of respiratory acidemia, which is caused by the accumulation of carbon dioxide.

Question 112: Are there accelerations present?

Yes (Correct answer)
Yes and the strip is reactive
No

Correct answer: Yes

Explanation: There are accelerations present in addition to the marked variability.

Question 113: If a provider gives a verbal order in response to an EFM concern, what must the nurse do according to safe documentation practice?

Record the order only if it results in a visible FHR improvement
Ask the provider to enter the order themselves before acting
Read back the order, implement it, and document it in the medical record promptly (Correct answer)
Implement the order and document it at the end of the shift

Correct answer: Read back the order, implement it, and document it in the medical record promptly

Safe practice requires read-back of verbal orders for verification, followed by prompt documentation in the medical record to ensure accurate and legal records.

Question 114: A clinician notes a visually apparent, smooth, sine wave-like undulating pattern in the FHR baseline with a frequency of 3-5 cycles per minute that persists for 25 minutes. This pattern is defined as a sinusoidal pattern and is a Category III tracing, often associated with which condition?

Maternal fever
Severe fetal anemia (Correct answer)
Use of epidural analgesia
Fetal sleep cycle

Correct answer: Severe fetal anemia

A true sinusoidal pattern is an ominous finding associated with high rates of fetal morbidity and mortality. It is most commonly linked with severe fetal anemia, which can result from conditions like Rh isoimmunization or significant fetal-maternal hemorrhage. [4, 9, 18]

Question 115: An EFM tracing shows a baseline of 125 bpm. Over the last 30 minutes, there have been recurrent late decelerations. However, variability has remained moderate throughout this period. What is the correct interpretation of this FHR pattern?

Category III, as any recurrent late deceleration is abnormal.
Category I, as variability is moderate.
Category II, due to the recurrent late decelerations with moderate variability. (Correct answer)
Category I, because the baseline is normal.

Correct answer: Category II, due to the recurrent late decelerations with moderate variability.

According to the NICHD guidelines, recurrent late decelerations in the presence of moderate variability classify a tracing as Category II. The pattern only becomes Category III if the recurrent late decelerations are accompanied by absent baseline variability. The presence of moderate variability is a key factor that prevents this from being a Category III tracing.

Question 116: A patient at 34 weeks with preterm premature rupture of membranes (PPROM) is on EFM. Which concern is MOST elevated compared to a term patient?

Macrosomia-related shoulder dystocia
Post-term placental insufficiency
Maternal hypoglycemia
Cord compression from oligohydramnios causing variable decelerations (Correct answer)

Correct answer: Cord compression from oligohydramnios causing variable decelerations

PPROM leads to oligohydramnios, which reduces the fluid cushion around the umbilical cord and significantly increases the frequency of cord compression and variable decelerations.

Question 117: What is the purpose of documenting maternal vital signs alongside the EFM strip during labor?

To demonstrate that the nurse was present in the room
To correlate maternal hemodynamic changes with fetal heart rate patterns (Correct answer)
To track fluid intake and output exclusively
To fulfill billing requirements only

Correct answer: To correlate maternal hemodynamic changes with fetal heart rate patterns

Maternal vital signs provide context for FHR interpretation because maternal hypotension, fever, and other changes directly affect uteroplacental perfusion and fetal status.

Question 118: The oxyhemoglobin dissociation curve is shifted to the RIGHT in fetal blood compared to maternal blood, meaning:

Fetal hemoglobin is less efficient at oxygen transport
Fetal hemoglobin releases oxygen more readily to maternal tissues
Fetal hemoglobin loads oxygen more easily at the placenta (Correct answer)
Fetal hemoglobin holds onto oxygen more tightly at any given PO2

Correct answer: Fetal hemoglobin loads oxygen more easily at the placenta

A leftward shift (not rightward) of fetal HbF means it loads oxygen more readily at the placenta; stating a rightward shift relative to maternal blood is incorrect — HbF curve is actually left-shifted, meaning higher affinity.

Question 119: What is the normal pH range for umbilical artery blood at delivery?

7.10 – 7.20
7.05 – 7.15
7.40 – 7.50
7.25 – 7.35 (Correct answer)

Correct answer: 7.25 – 7.35

A normal umbilical artery pH at delivery is 7.25–7.35, reflecting adequate fetal acid-base status.

Question 120: What is the recommended approach when a portion of the EFM strip is unreadable due to artifact?

Discard that portion of the strip and note it was uninformative
Restart the monitor without any documentation
Mark the strip as Category I to avoid liability
Document the artifact, describe maternal and fetal status at the time, and note corrective measures taken (Correct answer)

Correct answer: Document the artifact, describe maternal and fetal status at the time, and note corrective measures taken

Thorough documentation of artifact, clinical status, and corrective actions taken maintains the integrity of the medical record and demonstrates professional nursing judgment.

Question 121: Which physiological mechanism is primarily responsible for the presence of moderate variability in the fetal heart rate?

Fetal movement and behavioral state changes
Stimulation of fetal baroreceptors due to blood pressure changes
The release of catecholamines from the adrenal medulla
The interplay between the sympathetic and parasympathetic nervous systems (Correct answer)

Correct answer: The interplay between the sympathetic and parasympathetic nervous systems

Moderate variability, the fluctuations in the fetal heart rate baseline, is a direct reflection of a healthy, intact, and well-oxygenated fetal central nervous system. It is produced by the continuous and balanced push-and-pull interaction between the sympathetic (acceleratory) and parasympathetic (deceleratory) branches of the autonomic nervous system.

Question 122: A term fetus has a baseline heart rate of 175 bpm that persists for more than 10 minutes. Which of the following is the correct classification for this baseline?

Tachycardia (Correct answer)
Prolonged acceleration
Bradycardia
Normal baseline

Correct answer: Tachycardia

Fetal tachycardia is defined as a baseline fetal heart rate greater than 160 bpm lasting for 10 minutes or longer. A normal baseline is 110-160 bpm. Bradycardia is a baseline less than 110 bpm. A prolonged acceleration is an increase in FHR that lasts for 2 minutes or more but less than 10 minutes; if it lasts 10 minutes or more, it is considered a change in baseline.

Question 123: Which fetal heart rate pattern is MOST concerning in a patient with severe preeclampsia?

Early decelerations only
Accelerations with moderate variability
Mild variable decelerations with quick recovery
Late decelerations with minimal variability (Correct answer)

Correct answer: Late decelerations with minimal variability

In severe preeclampsia, uteroplacental insufficiency places the fetus at high risk, and late decelerations with minimal variability (Category III) indicate possible fetal acidemia.

Question 124: Which of the following is the most important characteristic of fetal heart tracings to determine fetal well-being?

Presence of Decelerations
Variability (Correct answer)
Baseline
Presence of Accelerations

Correct answer: Variability

Explanation: Variability is the single most important determinant of fetal well-being.

Question 125: A laboring patient's EFM tracing shows an abrupt FHR decrease from a baseline of 145 bpm to a nadir of 90 bpm. The onset of the deceleration to the nadir is less than 30 seconds. This change is best described as a:

Variable deceleration (Correct answer)
Early deceleration
Prolonged deceleration
Late deceleration

Correct answer: Variable deceleration

A variable deceleration is defined by its abrupt onset (onset to nadir in <30 seconds). It is a visually apparent decrease in the FHR of at least 15 bpm, lasting at least 15 seconds but less than 2 minutes. This pattern is typically caused by umbilical cord compression. [1, 5, 6]

Certification in Electronic Fetal Monitoring (C-EFM) Exam

The C-EFM certification examination by the National Certification Corporation (NCC) validates the knowledge and competency of healthcare professionals in electronic fetal monitoring interpretation and clinical decision-making during labor and delivery.

125

Questions

120 min

Time Limit

70%

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