Labor and Delivery Practice Questions

Q: In an emergency cesarean section, a parturient with eclampsia develops sudden hypoxia and hypotension. What is the most likely diagnosis?

Amniotic fluid embolism. ***Amniotic fluid embolism*** - The sudden onset of **hypoxia** and **hypotension** during a cesarean section in a parturient, especially with **eclampsia**, is highly suggestive of an amniotic fluid embolism. - This catastrophic event occurs when **amniotic fluid** enters the maternal circulation, leading to systemic shock, acute respiratory distress, coagulopathy, and often cardiac arrest. *Pulmonary embolism* - While pulmonary embolism can cause sudden **hypoxia** and **hypotension**, it is less likely to present with the rapid and severe systemic collapse typically seen with amniotic fluid embolism in this context. - Risk factors for pulmonary embolism include hypercoagulability, which is enhanced in pregnancy, but the **peripartum setting** points more strongly to an amniotic fluid embolism. *Aspiration pneumonitis* - **Aspiration pneumonitis** would typically present predominantly with **respiratory distress** and coughing, potentially leading to hypoxia, but less commonly with such immediate and severe hypotension. - It results from the inhalation of gastric contents, which can occur during general anesthesia but doesn't fully explain the complete clinical picture of profound **cardiovascular collapse**. *Acute respiratory distress syndrome* - **ARDS** is a syndrome of diffuse lung injury leading to severe **hypoxia** and reduced lung compliance, but it usually develops over hours to days. - The sudden onset of symptoms during the procedure makes ARDS as the primary immediate event less likely, though it can be a **secondary complication** of amniotic fluid embolism.

Q: A primigravida at term is assessed using the Bishop's score. Which of the following parameters is not included in the Bishop's score?

Fetal heart rate. ***Fetal heart rate*** - **Fetal heart rate is NOT part of the Bishop's score** and is the correct answer to this question. - The Bishop's score is a pre-labor scoring system used to assess cervical readiness for induction of labor. - It includes only **five parameters**: cervical dilation, cervical effacement, cervical consistency, cervical position, and fetal station. - Fetal heart rate is assessed separately as part of fetal wellbeing monitoring but does not contribute to the Bishop's score. *Cervical effacement* - **Cervical effacement** (thinning of the cervix) is a key component of the Bishop's score. - It indicates cervical ripeness and is expressed as a percentage (0-80%+ = 0-3 points). *Fetal station* - **Fetal station** measures the descent of the fetal presenting part relative to the maternal ischial spines. - It is scored from -3 to +3 and contributes to the Bishop's score (0-3 points). *Cervical dilation* - **Cervical dilation** is a primary component measuring cervical opening in centimeters. - It is the most heavily weighted parameter in predicting successful induction (0-10 cm = 0-3 points).

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: 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: 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: The image shows different types of placenta in relation to the internal cervical os. Identify the type of placenta previa shown in the highlighted/marked image.

Type II (marginal).. ***Type II (marginal)*** - In **marginal placenta previa**, the placenta reaches the **edge of the internal cervical os** but does not cover it. - This is classified as a minor placenta previa, as depicted in the provided image. *Type I (low-lying)* - A **low-lying placenta** is when the placental edge is within **2 cm of the internal cervical os** but does not reach it. - The image for low-lying placenta shows the edge 1-20 mm from the os, not directly at the edge as in marginal. *Type III (partial)* - **Partial placenta previa** occurs when the placenta **partially covers the internal cervical os**. - The image labeled "Partial placenta previa" illustrates the placenta covering only a portion of the os, which is a major previa. *Type IV (complete)* - **Complete placenta previa** involves the placenta **completely covering the internal cervical os**. - The image labeled "Complete placenta previa" clearly shows the placenta entirely obstructing the os, which is a major previa.

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: The pelvic inlet is usually considered to be contracted if its shortest anteroposterior diameter is less than 10 cm.

10 cm. ***10 cm*** - A pelvic inlet is clinically defined as **contracted** when its shortest anteroposterior diameter (the **obstetric conjugate**) is **less than 10 cm**. - This is the standard threshold used in obstetric practice to identify inlet contraction that may lead to **cephalopelvic disproportion**. - The normal obstetric conjugate measures approximately **10-11 cm**, so values below 10 cm indicate a contracted pelvis requiring careful assessment and management. *8 cm* - While 8 cm represents a **severely contracted pelvis** with significant risk of obstructed labor, it is not the defining threshold. - This measurement indicates **absolute contraction** where vaginal delivery is extremely difficult or impossible, but the standard definition of contraction begins at less than 10 cm. *12 cm* - A measurement of 12 cm for the obstetric conjugate is considered **normal to adequate**, well above the threshold for contraction. - This diameter would facilitate uncomplicated vaginal birth in most cases and poses no concern for inlet contraction. *14 cm* - An obstetric conjugate of 14 cm represents a **very capacious pelvis**, far exceeding normal measurements. - This measurement would pose no risk of cephalopelvic disproportion and indicates an unusually wide pelvic inlet.

Question 1

In an emergency cesarean section, a parturient with eclampsia develops sudden hypoxia and hypotension. What is the most likely diagnosis?

Accepted Answer

Amniotic fluid embolism

Answer

Pulmonary embolism

Answer

Aspiration pneumonitis

Answer

Acute respiratory distress syndrome

Question 2

A primigravida at term is assessed using the Bishop's score. Which of the following parameters is not included in the Bishop's score?

Accepted Answer

Fetal heart rate

Answer

Cervical effacement

Answer

Fetal station

Answer

Cervical dilation

Question 3

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 4

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 5

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 6

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 7

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 8

The image shows different types of placenta in relation to the internal cervical os. Identify the type of placenta previa shown in the highlighted/marked image.

Accepted Answer

Type II (marginal).

Answer

Type I (low-lying).

Answer

Type III (partial).

Answer

Type IV (complete).

Question 9

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 10

The pelvic inlet is usually considered to be contracted if its shortest anteroposterior diameter is less than 10 cm.

Accepted Answer

10 cm

Answer

12 cm

Answer

14 cm

Answer

8 cm

Labor and Delivery — MCQs

Labor and Delivery — MCQs

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