Labor and Delivery Practice Questions

Q: During labor, continuous fetal heart rate monitoring is performed. Which of the following indicates fetal distress?

Late decelerations. ***Late decelerations*** - These are a sign of **uteroplacental insufficiency**, where there is insufficient blood flow from the uterus to the placenta, leading to fetal hypoxemia and acidosis. - They are characterized by a gradual decrease in fetal heart rate that begins after the peak of the contraction and returns to baseline only after the contraction has ended. *Fetal heart rate of 120 bpm* - A fetal heart rate of 120 bpm is within the **normal range** (typically 110-160 bpm) and does not, by itself, indicate fetal distress. - Isolated heart rate values must be interpreted in the context of other monitoring parameters like variability and presence of decelerations. *Accelerations* - **Accelerations** are abrupt increases in fetal heart rate above the baseline (at least 15 bpm above baseline, lasting at least 15 seconds) and are an **indicator of fetal well-being**. - Their presence usually suggests a well-oxygenated fetus and a reassuring fetal status. *Moderate variability* - **Moderate variability** (amplitude range of 6-25 bpm) is considered a key sign of a **healthy and well-oxygenated fetal brain** and autonomic nervous system. - It is a reassuring finding and typically rules out significant fetal distress.

Q: Which fetal monitoring method provides the most comprehensive evaluation of fetal well-being during labor?

Internal fetal monitoring. ***Internal fetal monitoring*** - **Internal fetal monitoring** (e.g., **fetal scalp electrode** and **intrauterine pressure catheter**) provides direct and continuous measurement of **fetal heart rate** and **uterine contractions**, offering the most precise data. - This method is particularly useful in high-risk pregnancies or when external monitoring is inconclusive, allowing for early detection of **fetal distress**. *Intermittent auscultation* - **Intermittent auscultation** involves listening to the fetal heart rate at regular intervals, which is suitable for low-risk pregnancies but provides only a **snapshot** of fetal well-being, potentially missing subtle changes. - It does not provide information on **uterine contraction strength** or **variability** in fetal heart rate. *External fetal monitoring* - **External fetal monitoring** (e.g., **cardiotocography**) uses transducers placed on the maternal abdomen to estimate **fetal heart rate** and **uterine activity**, but can be affected by **maternal movement** or **obesity**. - While continuous, its accuracy is **inferior to internal monitoring**, especially in assessing the true intensity of contractions or in cases of fetal malposition. *Ultrasound* - **Ultrasound** is primarily used for **fetal anatomical assessment**, **growth evaluation**, and **biophysical profile** determination, but it is not a primary continuous monitoring method during labor. - It provides **static images** or **intermittent assessments** rather than continuous real-time data on fetal heart rate patterns or uterine contractions, which are crucial for labor monitoring.

Q: A 30-year-old woman in labor presents with sudden onset of chest pain and shortness of breath. Which condition should be suspected?

Amniotic fluid embolism. ***Amniotic fluid embolism*** - Sudden onset of **chest pain** and **shortness of breath** in a woman in labor is a classic presentation of **amniotic fluid embolism** due to the sudden entry of amniotic fluid into the maternal circulation. - This condition can rapidly lead to **cardiovascular collapse**, respiratory distress, and **disseminated intravascular coagulation (DIC)**. *Pulmonary embolism* - While pulmonary embolism can cause sudden chest pain and shortness of breath, it typically occurs due to a **thrombus** and is more common **postpartum** or in patients with risk factors like hypercoagulability. - Unlike amniotic fluid embolism, it does not typically present with the rapid onset of **DIC** or severe allergic-like reaction. *Pneumonia* - Pneumonia usually presents with a more gradual onset of symptoms such as **cough, fever, and chills**, along with shortness of breath. - It is unlikely to cause a sudden, acute event of severe chest pain and respiratory collapse in a laboring woman without prior symptoms. *Pericarditis* - Pericarditis is characterized by **pleuritic chest pain** that often worsens with inspiration and lying flat, and improves by leaning forward. - It is not typically associated with sudden, severe shortness of breath or the systemic collapse seen in amniotic fluid embolism, and is not specifically linked to labor.

Q: A partogram shows a laboring woman with a prolonged second stage of labor and a fetal heart rate of 120 bpm. Based on this information, what condition is most likely indicated?

Cephalopelvic Disproportion (CPD). ***Cephalopelvic Disproportion (CPD)*** - A **prolonged second stage** of labor, especially in the absence of obvious uterine inertia, strongly suggests a mismatch between the **fetal head size** and the maternal pelvis. - The fetal heart rate of 120 bpm is within a normal range, indicating the fetus is currently tolerating labor but does not rule out a mechanical obstruction. *Uterine rupture* - A uterine rupture is typically characterized by **sudden, severe abdominal pain**, **vaginal bleeding**, and often **fetal distress** (e.g., severe decelerations or bradycardia). - The given fetal heart rate of 120 bpm, while normal, does not align with the acute fetal compromise expected with a uterine rupture. *Prolonged labor due to maternal fatigue.* - While maternal fatigue can contribute to a prolonged labor, it usually manifests as **ineffective pushing efforts** rather than a fundamental obstruction in descent. - A normal fetal heart rate with a prolonged second stage still points to a mechanical issue that fatigue alone would not explain. *Prolonged labor due to weak uterine contractions.* - Weak uterine contractions (uterine inertia) would primarily lead to a **prolonged first stage** of labor or *arrest of dilation*, where the cervix fails to open adequately. - A prolonged second stage is more about fetal descent and expulsion, where contractions are still present but may be ineffective against an obstruction.

Q: Female with 41 wk gestation confirmed by radiological investigation, very sure of her LMP, no uterine contractions, no effacement and no dilatation. What should be done to induce labor?

PGE1 tab. ***PGE1 tab*** - **Misoprostol (PGE1)** is an effective agent for **cervical ripening** and labor induction in cases of an unfavorable cervix (no effacement, no dilatation). - It is cost-effective, stable at room temperature, and widely used in resource-limited settings. - Can be administered orally or vaginally with good efficacy for cervical ripening at term. - In this post-term pregnancy with unfavorable cervix, pharmacological ripening is appropriate. *PGE2 gel* - **PGE2 (dinoprostone)** gel or cervical insert is also an effective option for cervical ripening. - Both PGE1 and PGE2 are acceptable first-line agents; the choice may depend on availability, cost, and institutional protocols. - PGE2 formulations are FDA-approved and widely used, though may be more expensive than misoprostol. *PGF2alpha* - **PGF2alpha (carboprost)** is primarily used for the **management of postpartum hemorrhage** due to its potent myometrial contracting effect. - It is **not indicated** for induction of labor at term as its strong uterine contractions can cause excessive uterine stimulation and fetal distress. *Intracervical foley's* - An **intracervical Foley catheter** is a mechanical method that causes cervical ripening through direct pressure and stimulation of local prostaglandin release. - It is an evidence-based alternative with lower risk of uterine hyperstimulation compared to pharmacological methods. - Both mechanical and pharmacological methods are acceptable first-line options for cervical ripening in post-term pregnancy with unfavorable cervix.

Q: What is the next step in the management of shoulder dystocia after the McRoberts maneuver?

Apply suprapubic pressure. ***Apply suprapubic pressure*** - After performing the **McRoberts maneuver**, the next recommended step in managing shoulder dystocia is to apply **suprapubic pressure**. - This maneuver is performed by an assistant who applies pressure with the heel of their hand directly above the maternal pubic bone, in a downward and lateral direction, to dislodge the anterior shoulder from under the symphysis pubis. *Perform a 90-degree rotation of the posterior shoulder* - This describes the Woods' screw maneuver, which is typically attempted after McRoberts and suprapubic pressure have failed. - The Woods' screw maneuver involves rotating the fetal shoulder, usually by trying to rotate the posterior aspect of the fetal shoulder anteriorly, to reduce the bisacromial diameter. *Consider emergency c-section* - A **cesarean section** is generally not considered an immediate option for an actively occurring shoulder dystocia during a vaginal delivery, as it is a time-sensitive emergency. - While a C-section would resolve the dystocia, it would require significant time to prepare and execute, which would risk fetal hypoxia and injury when the head is already delivered. *Perform internal rotation maneuvers* - This statement is too general; internal rotation maneuvers, such as the Woods' screw or Rubin maneuvers, are indeed used but typically after suprapubic pressure. - Rubin II maneuver involves rotating the anterior shoulder to a more oblique position, and the Woods' screw maneuver involves rotating the posterior shoulder. Both are attempted if suprapubic pressure and McRoberts prove ineffective.

Q: What is the normal uterine blood flow at term?

500-700 ml/min. ***500-700 ml/min*** - At term, the uterus receives a substantial blood supply to meet the demands of the **growing fetus** and **placenta**. - This flow represents approximately **10-15% of the total cardiac output** in pregnant women. *50-75 ml/min* - This value is significantly **too low** for uterine blood flow at term. - Such a low flow would be insufficient to sustain fetal growth and development, leading to **fetal compromise**. *150-200 ml/min* - While an increase from non-pregnant levels, this value is still **below the normal range** for a full-term pregnancy. - It would not adequately perfuse the **placental bed** and transfer necessary nutrients and oxygen. *350-400 ml/min* - This range represents a considerable increase but is still somewhat **lower than the typical uterine blood flow at term**. - Uterine blood flow continues to increase throughout pregnancy, peaking in the **third trimester**.

Q: Which nerve is most commonly injured in McRoberts maneuver?

Femoral nerve. ***Femoral nerve*** - The **McRoberts maneuver** involves hyperflexion of the maternal hips, which can cause significant stretch on the maternal **lumbosacral plexus**. - Specifically, the **femoral nerve** (originating from L2-L4) can be compressed or stretched between the inguinal ligament and the hyperflexed thigh, leading to neuropathy. *Lumbosacral trunk* - While the **lumbosacral trunk** is part of the plexus, direct injury to its main body is less common than specific nerve branches during this maneuver. - The compression or stretch is often more focused on individual nerves passing through the pelvic outlet, such as the femoral nerve. *Obturator nerve* - The **obturator nerve** (L2-L4) passes through the obturator foramen and is less directly susceptible to injury from the hyperflexion of the hips in the McRoberts maneuver compared to the femoral nerve. - Its protected anatomical course makes it less vulnerable to the external forces applied during this maneuver. *Pudendal nerve* - The **pudendal nerve** (S2-S4) is typically associated with injury during vaginal delivery due to compression by the fetal head or forceps, not primarily from the hip hyperflexion in the McRoberts maneuver. - Its location deep within the perineum protects it from the mechanism of injury in the McRoberts maneuver.

Q: In partograph recommended by WHO, the distance between the alert and action lines is?

4 hours. ***4 hours*** - The **WHO partograph** uses alert and action lines to detect abnormal labor progression, especially in low-resource settings. - The **4-hour gap** between the alert and action lines provides time for health workers to intervene appropriately before complications become severe. *1 hour* - A 1-hour interval is too short in the context of labor progression, as true deviations often take longer to manifest. - This duration would lead to **premature interventions** and increased anxiety without clinical justification. *2 hours* - While seemingly a practical interval, 2 hours is still considered too short for optimal decision-making regarding labor arrest. - Many physiological variations in labor can occur within 2 hours that do not necessarily indicate a need for intervention. *5 hours* - A 5-hour interval between the alert and action lines would be too long, potentially leading to **delayed interventions** in cases of actual labor dystocia. - This delay could increase the risk of adverse maternal and fetal outcomes, such as **prolonged labor**, **infection**, or **fetal distress**.

Q: Engaging diameter in face presentation is?

Submentobregmatic. ***Submentobregmatic*** - In a **face presentation**, the fetal head is completely extended, causing the chin (**mentum**) to present. The engaging diameter is from the **submentum** (below the chin) to the **bregma** (anterior fontanelle). - This diameter measures approximately **9.5 cm** and is the smallest available diameter for engagement in face presentations that are in a **mentum-anterior** position. *Suboccipitobregmatic* - This is the engaging diameter in an **occiput-anterior presentation**, where the head is well-flexed. - It extends from the **subocciput** to the **bregma**, measuring around **9.5 cm**. *Occipitofrontal* - This diameter is involved in a **deflexed head presentation**, such as a **brow presentation**. - It measures about **11.5 cm** and extends from the **occiput** to the **frontal eminences**. *Mentovertical* - This is the engaging diameter for a **brow presentation**, where the head is partially extended. - It is the largest presenting diameter, measuring approximately **13.5 cm**, and typically leads to obstructed labor.

Question 1

During labor, continuous fetal heart rate monitoring is performed. Which of the following indicates fetal distress?

Accepted Answer

Late decelerations

Answer

Fetal heart rate of 120 bpm

Answer

Accelerations

Answer

Moderate variability

Question 2

Which fetal monitoring method provides the most comprehensive evaluation of fetal well-being during labor?

Accepted Answer

Internal fetal monitoring

Answer

Intermittent auscultation

Answer

External fetal monitoring

Answer

Ultrasound

Question 3

A 30-year-old woman in labor presents with sudden onset of chest pain and shortness of breath. Which condition should be suspected?

Accepted Answer

Amniotic fluid embolism

Answer

Pulmonary embolism

Answer

Pneumonia

Answer

Pericarditis

Question 4

A partogram shows a laboring woman with a prolonged second stage of labor and a fetal heart rate of 120 bpm. Based on this information, what condition is most likely indicated?

Accepted Answer

Cephalopelvic Disproportion (CPD)

Answer

Uterine rupture

Answer

Prolonged labor due to weak uterine contractions

Answer

Prolonged labor due to maternal fatigue

Question 5

Female with 41 wk gestation confirmed by radiological investigation, very sure of her LMP, no uterine contractions, no effacement and no dilatation. What should be done to induce labor?

Accepted Answer

PGE1 tab

Answer

PGE2 gel

Answer

PGF2alpha

Answer

Intracervical foley’s

Question 6

What is the next step in the management of shoulder dystocia after the McRoberts maneuver?

Accepted Answer

Apply suprapubic pressure

Answer

Perform internal rotation maneuvers

Answer

Consider emergency c-section

Answer

Perform a 90-degree rotation of the posterior shoulder

Question 7

What is the normal uterine blood flow at term?

Accepted Answer

500-700 ml/min

Answer

50-75 ml/min

Answer

150-200 ml/min

Answer

350-400 ml/min

Question 8

Which nerve is most commonly injured in McRoberts maneuver?

Accepted Answer

Femoral nerve

Answer

Lumbosacral trunk

Answer

Obturator nerve

Answer

Pudendal nerve

Question 9

In partograph recommended by WHO, the distance between the alert and action lines is?

Accepted Answer

4 hours

Answer

1 hour

Answer

2 hours

Answer

5 hours

Question 10

Engaging diameter in face presentation is?

Accepted Answer

Submentobregmatic

Answer

Occipitofrontal

Answer

Suboccipitobregmatic

Answer

Mentovertical

Labor and Delivery — MCQs

Labor and Delivery — MCQs

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