Labor and Delivery — MCQs

Labor and Delivery Indian Medical PG Practice Questions and MCQs

Question 1001: Incomplete uterine rupture is defined as?

A. Disruption of entire length of scar
B. Disruption of scar with peritoneum intact (Correct Answer)
C. Disruption of scar including peritoneum
D. Disruption of part of scar

Explanation: ***Disruption of scar with peritoneum intact*** - An **incomplete uterine rupture** is characterized by a tear in the uterine wall that does not extend through the serosal layer (peritoneum). - This means the **peritoneum remains intact**, containing the rupture within the uterine muscle. *Disruption of entire length of scar* - This description is too general and does not specify whether the peritoneum is involved, which is crucial for distinguishing between complete and incomplete rupture. - The extent of the scar disruption alone does not define completeness without mentioning the **peritoneal integrity**. *Disruption of scar including peritoneum* - This definition describes a **complete uterine rupture**, where the tear extends through all layers of the uterine wall, including the serosa. - In a complete rupture, there is direct communication between the uterine cavity and the **peritoneal cavity**. *Disruption of part of scar* - This refers to the **extent of the tear** within the scar, but it does not specify whether the tear penetrates the peritoneum. - Therefore, it doesn't adequately differentiate between incomplete or complete rupture based solely on the scar length involved.

Question 1002: How do you manage placenta accreta?

A. Classical cesarean; hysterectomy (Correct Answer)
B. Low vertical cesarean; hysterectomy
C. Low transverse cesarean; hysterectomy
D. Classical cesarean; myometrial resection

Explanation: ***Classical cesarean; hysterectomy*** - A **classical cesarean section** (vertical incision in the upper uterine segment) allows for delivery of the fetus without disturbing the **placenta accreta** in the lower uterine segment. - Subsequent **hysterectomy** is often necessary due to the high risk of severe hemorrhage from the morbidly adherent placenta, which cannot be safely separated. *Low vertical cesarean; hysterectomy* - A **low vertical incision** is made in the lower uterine segment, which could potentially incise through the placenta accreta if it extends to that region, leading to significant hemorrhage. - While hysterectomy is likely indicated, the initial uterine incision might complicate management. *Low transverse cesarean; hysterectomy* - A **low transverse incision** is the most common type for routine cesarean sections but is contra-indicated in placenta accreta as the placenta is frequently implanted in the lower uterine segment. - Incising through the **placenta** during a low transverse cut would cause immediate massive hemorrhage, making this approach unsuitable. *Classical cesarean; myometrial resection* - While a **classical cesarean** would be the appropriate initial step for fetal delivery, **myometrial resection** to remove only the affected area of the myometrium is generally insufficient and carries a high risk of residual placental tissue and severe hemorrhage, often necessitating a hysterectomy anyway. - This approach is typically not recommended as a primary definitive management strategy for established placenta accreta.

Question 1003: Which of the following statements is TRUE regarding obstetric inversion?

A. It is usually acute (Correct Answer)
B. In majority, it is spontaneous in nature
C. It is usually insidious in onset
D. It is usually incomplete

Explanation: ***It is usually acute*** - Obstetric inversion, particularly **uterine inversion**, is almost always an acute event occurring **immediately postpartum**. - Its rapid onset contributes to significant **hemorrhage** and **shock**, making it an obstetric emergency. *In majority, it is spontaneous in nature* - The majority of uterine inversions are **iatrogenic**, often triggered by improper management of the third stage of labor, such as excessive **cord traction** or fundal pressure. - While spontaneous inversion can occur, it is much less common than cases associated with obstetric interventions. *It is usually insidious in onset* - Obstetric inversion is characterized by a **sudden** and dramatic presentation, typically involving rapid blood loss, severe pain, and shock. - An insidious or gradual onset is not characteristic of acute uterine inversion. *It is usually incomplete* - While varying degrees of inversion exist, a significant proportion, particularly those causing severe symptoms, are **complete**, with the fundus protruding through the cervix or even outside the introitus. - Even in incomplete cases, the fundus has invaginated significantly, causing a palpable depression and critical symptoms.

Question 1004: In heart disease, prophylactic forceps are applied when the fetal head is at which station?

A. +2 (Correct Answer)
B. -1
C. 0
D. +1

Explanation: ***+2*** - Prophylactic forceps are applied when the fetal head is at **+2 station** or lower to facilitate a **swift and controlled delivery**. - This approach minimizes the **maternal pushing effort** and associated cardiovascular strain in women with heart disease. *–1* - A fetal head at **–1 station** indicates that it is still relatively high in the birth canal. - Applying forceps at this station would be considered a **mid-forceps delivery**, which carries higher risks and is not typically used prophylactically in cardiac patients. *0* - A fetal head at **0 station**, or engaged, is at the level of the ischial spines. - While engagement is necessary for assisted delivery, applying prophylactic forceps at this station might still require prolonged effort, contradicting the goal of reducing maternal strain. *+1* - A fetal head at **+1 station** is slightly below the ischial spines. - While closer to delivery than 0 station, **+2 station** is preferred for prophylactic forceps to ensure the most efficient and least strenuous delivery.

Question 1005: Forceps may be preferred over vacuum for operative delivery due to the following reasons, EXCEPT:

A. Vacuum requires more clinical skills than forceps (Correct Answer)
B. Forceps are more commonly associated with fetal facial injury
C. Vacuum has more chance of formation of cephalhematoma
D. Vacuum is preferred in certain cases to minimize trauma and reduce transmission risks

Explanation: ***Vacuum requires more clinical skills than forceps*** - This statement is **incorrect** - vacuum extraction typically requires **less clinical skill** than forceps application - Forceps application demands precise knowledge of fetal head position, station, and careful maneuvering, requiring more training and expertise - Since vacuum actually requires less skill (not more), this is NOT a valid reason to prefer forceps over vacuum - **This is the correct answer to the EXCEPT question** *Forceps are more commonly associated with fetal facial injury* - This is **true** - forceps application involves direct compression and traction on the fetal head - This increases risk of **facial nerve palsies**, **bruising**, **lacerations**, and **skull fractures** - However, this is a **disadvantage** of forceps, not a reason to prefer them - Despite this, in certain clinical situations (e.g., need for rapid delivery, specific fetal positions), forceps may still be chosen when their advantages outweigh this risk *Vacuum has more chance of formation of cephalhematoma* - This is **true** - vacuum extraction creates suction on the fetal scalp, leading to blood accumulation under the periosteum - **Cephalhematoma** occurs more frequently with vacuum (10-20%) compared to forceps (1-2%) - This is a valid reason why forceps might be preferred when avoiding scalp trauma is important *Vacuum is preferred in certain cases to minimize trauma and reduce transmission risks* - This is **true** - vacuum causes less maternal perineal trauma compared to forceps - In cases of maternal infections (HIV, HSV), vacuum may reduce transmission risk due to fewer maternal lacerations - However, when rapid delivery is essential or specific fetal positions require rotation, forceps may still be chosen despite vacuum having these advantages

Question 1006: Episotomy extended posteriorly beyond perineal body injuring structure posterior to it, which structure is injured?

A. Urethral sphincter
B. Ischiocavernosus
C. External anal sphincter (Correct Answer)
D. Bulbospongiosus

Explanation: ***External anal sphincter*** - An episiotomy extending posteriorly beyond the **perineal body** (the central tendon of the perineum) is likely to involve the **external anal sphincter (EAS)**, which lies immediately posterior to the perineal body. - Injury to the EAS can lead to **fecal incontinence** due to its role in voluntary control of defecation. *Urethral sphincter* - The **urethral sphincter** is located anterior to the vaginal introitus and is not typically affected by a posterior extension of an episiotomy. - Damage to the urethral sphincter would lead to **urinary incontinence**, not directly related to posterior perineal injury. *Ischiocavernosus* - The **ischiocavernosus muscle** covers the crus of the clitoris (or penis in males) and is located more laterally and anteriorly in the perineum. - Its primary role is in **clitoral (or penile) erection**, and it is generally not injured by an episiotomy, especially one extending posteriorly. *Bulbospongiosus* - The **bulbospongiosus muscle** surrounds the vaginal opening and bulb of the vestibule, lying superficial to the perineal membrane. - While an episiotomy cuts through this muscle, a posterior extension *beyond* the perineal body would primarily involve structures further back, such as the **external anal sphincter**, not just the bulbospongiosus.

Question 1007: Shoulder dystocia is managed by all of the following except:-

A. Woods cork screw method
B. Supra pubic pressure
C. Fundal pressure by an able nurse (Correct Answer)
D. Zavanelli maneuver

Explanation: ***Fundal pressure by an able nurse*** - **Fundal pressure** is contraindicated in shoulder dystocia because it can worsen the impaction of the anterior shoulder against the symphysis pubis and potentially lead to uterine rupture or fetal injury. - Applying pressure from above pushes the fetus further into the birth canal obstruction, increasing the risk of **fetal asphyxia** and **brachial plexus injury**. *Woods cork screw method* - This maneuver involves rotating the fetal shoulders by applying pressure to the posterior aspect of the **posterior shoulder**, which often helps to disimpact the anterior shoulder. - It is a recognized and effective technique used to resolve **shoulder dystocia**. *Supra pubic pressure* - **Suprapubic pressure** is applied externally over the maternal suprapubic bone to dislodge the anterior shoulder from behind the symphysis pubis. - This maneuver is often performed first after the initial attempts at fetal head traction and **McRoberts maneuver** to help release the impacted shoulder. *Zavanelli maneuver* - The **Zavanelli maneuver** involves pushing the fetal head back into the uterus and performing an immediate cesarean section. - It is considered a **last-resort maneuver** for severe shoulder dystocia when other techniques have failed, carrying significant risks but sometimes necessary to prevent fetal death.

Question 1008: Best predictor of successful vaginal birth after cesarean (VBAC)?

A. Previous vaginal delivery (Correct Answer)
B. BMI <30
C. Spontaneous labor
D. Inter-pregnancy interval >24 months

Explanation: ***Previous vaginal delivery*** - A history of prior **vaginal delivery**, especially a prior successful **vaginal birth after cesarean (VBAC)**, is the strongest predictor of successful VBAC. - This indicates a proven capacity for the **pelvis** and **uterus** to accommodate a vaginal birth. *BMI <30* - While a **lower BMI** is associated with higher VBAC success rates, it is not the strongest predictor compared to obstetrical history. - **Maternal obesity** (BMI $\ge$ 30) is considered a risk factor for VBAC failure, but a BMI below 30 alone does not guarantee success. *Spontaneous labor* - The onset of **spontaneous labor** increases the likelihood of a successful VBAC compared to induced labor, but prior vaginal delivery carries greater predictive weight. - Absence of spontaneous labor does not contraindicate VBAC, as **induction** can still be successful in many cases. *Inter-pregnancy interval >24 months* - An **inter-pregnancy interval** of greater than 18-24 months is associated with a lower risk of **uterine rupture** and slightly improved VBAC success rates. - However, it is a less significant predictor of overall success than a history of prior vaginal delivery.

Question 1009: Best marker for diagnosis of premature rupture of membranes (PROM)?

A. Placental alpha microglobulin-1 (Correct Answer)
B. Insulin-like growth factor binding protein-1
C. Fern test
D. Vaginal pH >6.5

Explanation: ***Placental alpha microglobulin-1*** - **Placental alpha microglobulin-1 (PAMG-1)** is a protein found in high concentrations in **amniotic fluid** but not in cervicovaginal secretions, making it a highly specific and sensitive marker for **PROM**. - Its detection via a **rapid immunoassay (AmniSure)** provides a reliable and fast diagnosis of ruptured membranes, especially in equivocal cases. *Insulin-like growth factor binding protein-1* - **Insulin-like growth factor binding protein-1 (IGFBP-1)** is also present in amniotic fluid and used in some tests (e.g., **Actim PROM**), but PAMG-1 generally has slightly superior diagnostic accuracy. - While useful, its specificity can be affected by blood or other vaginal contaminants. *Fern test* - The **fern test** involves examining dried vaginal fluid under a microscope for a characteristic **ferning pattern** that indicates the presence of amniotic fluid. - This test has lower sensitivity and specificity compared to biochemical markers and can be influenced by cervical mucus, semen, or urine. *Vaginal pH >6.5* - Amniotic fluid is typically **alkaline (pH 7.0-7.5)**, so a vaginal pH greater than 6.5 suggests the presence of amniotic fluid. - However, vaginal pH can also be elevated by conditions like **bacterial vaginosis**, **semen**, or **blood**, leading to false positives.

Question 1010: True about uterine rupture during labor:

A. Not associated with fetal distress
B. Best treated conservatively
C. Always causes pain
D. Occurs more with previous cesarean (Correct Answer)

Explanation: ***Occurs more with previous cesarean*** - A prior **cesarean section** poses a significant risk factor for uterine rupture during subsequent labors due to the presence of a uterine scar that can dehisce. - The risk of uterine rupture increases with the number of previous C-sections, especially in cases of short inter-pregnancy intervals or specific types of uterine incisions. *Not associated with fetal distress* - **Fetal distress** is a very common and critical sign of uterine rupture, often manifesting as sudden **severe bradycardia** or **late decelerations** due to placental compromise or direct fetal injury. - The disruption of the uterine wall can lead to **hypoxia, acidosis, and fetal demise** if not urgently addressed. *Best treated conservatively* - **Uterine rupture is a medical emergency** requiring **immediate surgical intervention**, typically a **laparotomy** for repair of the uterus and delivery of the fetus. - Conservative management is generally inappropriate and can lead to **severe maternal hemorrhage, fetal anoxia, and death** due to rapid blood loss and lack of oxygen to the fetus. *Always causes pain* - While often accompanied by **sudden, severe abdominal pain**, uterine rupture can sometimes present with less obvious symptoms, particularly if it's a **dehiscence of an old scar** without complete rupture. - In some cases, the primary sign might be **fetal distress** or **vaginal bleeding** with minimal maternal pain, especially if the mother has an **epidural analgesia** in place masking pain.

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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