Labor and Delivery — MCQs

Labor and Delivery Indian Medical PG Practice Questions and MCQs

Question 1011: A 29-year-old woman at 39 weeks of gestation presents with spontaneous rupture of membranes and meconium-stained amniotic fluid. What is the most appropriate initial step in management?

A. Immediate induction of labor
B. Expectant management
C. Fetal heart rate monitoring (Correct Answer)
D. Cesarean section

Explanation: ***Fetal heart rate monitoring*** - The presence of **meconium-stained amniotic fluid** necessitates immediate assessment of **fetal well-being** to rule out **fetal distress**. - **Continuous fetal heart rate monitoring** helps identify potential complications like **cord compression** or **fetal hypoxemia**, guiding subsequent management. *Immediate induction of labor* - While delivery will be planned, **immediate induction** is not the *first* step; initial assessment of fetal status is more critical. - Induction might be considered after fetal assessment, but only if the cervix is favorable and there are no signs of severe distress. *Expectant management* - **Expectant management** is inappropriate with **meconium-stained amniotic fluid** due to the increased risk of **meconium aspiration syndrome** and fetal distress. - Close monitoring and prompt intervention are essential to ensure fetal and neonatal safety. *Cesarean section* - A **Cesarean section** might be indicated if severe **fetal distress** is identified, but it is not the *initial* step without prior fetal assessment. - Many cases of meconium-stained fluid can still result in a vaginal delivery with appropriate monitoring and supportive care.

Question 1012: A primigravida at 39 weeks presents in active labor with cervical dilation of 6 cm, regular contractions every 3-4 minutes, and no progress in cervical dilation after 4 hours. What is the most appropriate management?

A. Amniotomy
B. Oxytocin augmentation (Correct Answer)
C. Emergency cesarean section
D. Expectant management

Explanation: ***Oxytocin augmentation*** - This patient is experiencing **active phase arrest**, defined as cervical dilation of 6 cm or more with ruptured membranes and no cervical change for **4 hours with adequate contractions**, or **6 hours with inadequate contractions**. - The contractions occurring every 3-4 minutes suggest **suboptimal uterine activity** for active labor progression (optimal is every 2-3 minutes). - **Oxytocin augmentation** is the appropriate first-line management to improve contraction frequency and intensity, promoting cervical dilation. - Before proceeding to cesarean section, augmentation should be attempted unless there are contraindications. *Amniotomy* - **Amniotomy** can augment labor if membranes are intact, but it is **less effective than oxytocin** for managing active phase arrest. - If membranes are already ruptured, amniotomy is not an option. - Oxytocin provides more controlled and predictable augmentation of labor. *Emergency cesarean section* - Cesarean section is indicated when **oxytocin augmentation fails** after adequate trial, or when there are maternal/fetal compromise or suspected cephalopelvic disproportion. - Since augmentation has not been attempted, proceeding directly to cesarean section would be premature. - Current guidelines recommend attempting augmentation before surgical intervention in the absence of urgent indications. *Expectant management* - **Expectant management** is inappropriate as the patient has met criteria for active phase arrest requiring intervention. - Prolonged labor without intervention increases risks of **maternal exhaustion, chorioamnionitis, and fetal compromise**. - Active intervention is necessary to promote safe labor progression.

Question 1013: What is the first step in the management of a prolapsed umbilical cord during labor?

A. Immediate emergency cesarean section
B. Administration of tocolytics as needed
C. Manual reduction of the cord if possible
D. Positioning the mother in a knee-chest position (Correct Answer)

Explanation: ***Positioning the mother in a knee-chest position*** - The immediate priority in a prolapsed umbilical cord is to **relieve pressure on the cord** to maintain fetal oxygenation. - The **knee-chest position** (or Trendelenburg or modified Sims position) uses gravity to shift the fetus away from the cervix, thus reducing compression on the cord. *Immediate emergency cesarean section* - While an emergency cesarean section is the definitive management for delivery once the cord prolapse is diagnosed, it is not the **first step**. - Relieving cord compression must happen *before* or concurrently with preparations for surgery to prevent **fetal hypoxia** and death. *Administration of tocolytics as needed* - Tocolytics (medications to stop uterine contractions) may be considered *after* relieving cord compression to inhibit contractions and reduce further cord compression during preparations for delivery. - However, they are not the initial, primary response to **alleviate cord compression**. *Manual reduction of the cord if possible* - **Manual reduction of the umbilical cord** is generally **contraindicated** due to the risk of inducing vasospasm or further cord compression, which can worsen fetal compromise. - The primary goal is to keep the cord uncompressed and outside the birth canal while preparing for delivery.

Question 1014: What is the leading cause of maternal mortality worldwide?

A. Eclampsia
B. Obstructed labor
C. Sepsis
D. Postpartum hemorrhage (Correct Answer)

Explanation: ***Postpartum hemorrhage*** - **Postpartum hemorrhage** is the leading cause of maternal mortality worldwide, accounting for roughly **25% of all maternal deaths** - Defined as blood loss of **500 mL or more** within 24 hours after vaginal birth, or **1000 mL or more** after cesarean section - Remains the most common preventable cause of maternal death globally, particularly in low-resource settings *Incorrect: Eclampsia* - Eclampsia is a serious complication of preeclampsia, characterized by **new-onset grand mal seizures** in a pregnant woman - While a significant cause of maternal morbidity and mortality, it accounts for approximately **10-15% of maternal deaths** globally, which is less than postpartum hemorrhage *Incorrect: Obstructed labor* - **Obstructed labor** occurs when the fetus cannot exit the pelvis despite strong contractions, often leading to uterine rupture, infection, or fetal distress - A major cause of maternal and fetal death particularly in low-resource settings, but accounts for approximately **8% of maternal deaths** globally *Incorrect: Sepsis* - **Maternal sepsis** involves severe systemic infection during pregnancy, childbirth, or postpartum, which can lead to organ dysfunction and death - Accounts for approximately **11% of maternal deaths** globally, making it a critical but not the leading cause

Question 1015: Compare the immediate management options for umbilical cord prolapse in a term pregnancy with an abnormal fetal heart rate. Which intervention is most likely to prevent fetal hypoxia?

A. Manual elevation of the presenting part (Correct Answer)
B. Emergency cesarean section
C. Tocolysis
D. Amnioinfusion

Explanation: ***Manual elevation of the presenting part*** - This intervention **relieves compression** on the umbilical cord, immediately restoring blood flow and preventing further fetal hypoxia. - It serves as a **bridging measure** to gain time for an emergency delivery, typically a cesarean section. *Emergency cesarean section* - While the definitive treatment for delivery with cord prolapse, it is **not the *immediate* action** to prevent hypoxia; manual elevation must precede it to stabilize the fetus. - The surgical preparation and execution take time, during which **fetal oxygenation** must be maintained. *Tocolysis* - Administering **tocolytics** (drugs to relax the uterus) may be considered to reduce uterine contractions, which can worsen cord compression. - However, it is a **secondary measure** that does not directly relieve cord compression as effectively as manual elevation. *Amnioinfusion* - This procedure involves infusing saline into the amniotic cavity, primarily used for **variable decelerations** due to cord compression not associated with prolapse, or meconium dilution. - It is **not effective** for the immediate relief of a prolapsed umbilical cord, as it does not address the physical compression.

Question 1016: A primigravida at 40 weeks of gestation presents with regular contractions and cervical dilation of 4 cm. Which stage of labor is she in?

A. First stage (Correct Answer)
B. Second stage
C. Third stage
D. Fourth stage

Explanation: ***First stage*** - The **first stage of labor** extends from the onset of regular contractions until **complete cervical dilation (10 cm)**. - It is divided into: - **Latent phase:** Cervical dilation from 0-6 cm (patient is at 4 cm, thus in this phase) - **Active phase:** Cervical dilation from 6-10 cm with more rapid progression - The **cervical dilation of 4 cm with regular contractions** clearly indicates the patient is in the **first stage, latent phase**. *Second stage* - The **second stage of labor** begins when the cervix is **fully dilated (10 cm)** and ends with the **birth of the baby**. - Characterized by **maternal pushing efforts** and descent of the fetal presenting part. - Since the patient has only 4 cm dilation, she has **not yet entered** this stage. *Third stage* - The **third stage of labor** begins immediately after the **birth of the baby** and ends with **delivery of the placenta**. - Involves placental separation and expulsion of the placenta and membranes. - Typically lasts 5-30 minutes. *Fourth stage* - The **fourth stage of labor** refers to the **immediate postpartum period** (first 1-4 hours after placental delivery). - Critical period for monitoring **maternal vital signs, uterine tone, and bleeding** to detect complications like postpartum hemorrhage.

Question 1017: What is the best initial treatment for a prolapsed umbilical cord discovered during labor?

A. Cesarean delivery
B. Manual repositioning of the cord
C. Elevating the presenting part (Correct Answer)
D. Administration of tocolytics

Explanation: ***Elevating the presenting part*** - Elevating the presenting part (e.g., using a **gloved hand** to push the fetal head off the cord) is the immediate action to relieve pressure on the prolapsed umbilical cord and prevent **fetal hypoxia**. - This maneuver is crucial while preparing for an **emergency cesarean delivery**, which is the definitive treatment. *Cesarean delivery* - While an **emergency cesarean delivery** is the definitive management for a prolapsed umbilical cord, it is not the *initial* action. - The immediate priority is to **alleviate cord compression** before the surgical procedure can be performed. *Manual repositioning of the cord* - Attempting to manually push the cord back into the uterus is generally **not recommended** due to the risk of further compressing the cord, introducing infection, or causing trauma. - The goal is to relieve pressure on the cord, not necessarily to return it to its original position. *Administration of tocolytics* - **Tocolytics** are medications used to relax the uterus and inhibit contractions, which might be considered in some scenarios to reduce pressure on the cord. - However, elevating the presenting part mechanically is a more direct and immediate action to relieve **cord compression** and is the priority while waiting for tocolytics to take effect or for a C-section.

Question 1018: Which factor is the most predictive of successful labor induction in a full-term primigravida?

A. Cervical readiness
B. Fetal size
C. Bishop score (Correct Answer)
D. Amniotic fluid assessment

Explanation: ***Bishop score*** - The **Bishop score** is a pre-labor scoring system used to determine the likelihood of **successful vaginal delivery** after induction. - A higher Bishop score indicates a **more favorable cervix** and therefore a greater chance of successful induction. *Cervical readiness* - While cervical readiness is crucial for successful induction, the **Bishop score is the standardized tool** used to quantitatively assess and predict this readiness. - It integrates several elements of cervical status, rather than just a general "readiness." *Fetal size* - **Fetal size** can impact the ease of labor progression but is not the primary determinant of whether an **induction will be successful in initiating labor**. - A very large fetus (macrosomia) can lead to labor complications but does not directly predict the initial success of induction itself. *Amniotic fluid assessment* - **Amniotic fluid assessment** (e.g., amniotic fluid index) is important for evaluating **fetal well-being** and identifying complications like oligohydramnios or polyhydramnios. - However, it does not directly predict the success of labor induction in terms of cervical response or uterine contractility.

Question 1019: Which diagnostic test is preferred for confirming the diagnosis of intra-amniotic infection during labor?

A. Amniocentesis (Correct Answer)
B. Maternal blood culture
C. Fetal heart rate monitoring
D. Clinical diagnosis based on maternal symptoms and signs

Explanation: ***Amniocentesis*** - **Amniocentesis** allows for direct collection of amniotic fluid, which can then be tested for bacterial growth, white blood cell count, glucose levels (decreased due to bacterial metabolism), and inflammatory markers such as interleukin-6. - This provides definitive laboratory evidence of infection within the amniotic cavity, confirming **intra-amniotic infection (IAI)**. - It is considered the gold standard confirmatory test when laboratory confirmation is needed, though clinical diagnosis is more commonly used in practice. *Maternal blood culture* - A maternal blood culture can detect systemic maternal infection but does not directly confirm the presence of intra-amniotic infection. - It is often negative even when IAI is present, as the infection may be localized to the amniotic sac. *Fetal heart rate monitoring* - Fetal heart rate monitoring can show signs of fetal distress, such as tachycardia, which may be a consequence of intra-amniotic infection, but it does not confirm the infection itself. - Fetal heart rate abnormalities can be caused by various other factors, making it a non-specific indicator for IAI. *Clinical diagnosis based on maternal symptoms and signs* - While maternal fever, uterine tenderness, tachycardia, and purulent vaginal discharge are strong indicators of suspected intra-amniotic infection, clinical diagnosis in traditional teaching is considered presumptive rather than definitive confirmation. - Amniocentesis provides objective laboratory evidence, distinguishing true infection from other febrile conditions during labor from a diagnostic standpoint.

Question 1020: In an emergency cesarean section, a parturient with eclampsia develops sudden hypoxia and hypotension. What is the most likely diagnosis?

A. Pulmonary embolism
B. Amniotic fluid embolism (Correct Answer)
C. Aspiration pneumonitis
D. Acute respiratory distress syndrome

Explanation: ***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.

Practice by Chapter

Physiology of Labor

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Stages of Labor and Normal Progression

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Fetal Monitoring Techniques

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Pain Management in Labor

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Induction and Augmentation of Labor

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Operative Delivery (Forceps and Vacuum)

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Cesarean Section: Indications and Techniques

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Dystocia and Abnormal Labor Patterns

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Obstetric Emergencies

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Postpartum Hemorrhage Management

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