Labor and Delivery Practice Questions

Q: In managing shoulder dystocia during vaginal delivery, which of the following is the correct sequence of maneuvers?

McRoberts → Rubin → Gaskin → Zavanelli. ***McRoberts → Rubin → Gaskin → Zavanelli*** - This sequence represents the general escalation of maneuvers, starting with the **McRoberts maneuver** and suprapubic pressure, which are the first-line and most effective steps. - Management proceeds logically from simple positional changes/minimal invasiveness (**Rubin's internal rotation, Gaskin position**) to the highly invasive, **last-resort Zavanelli maneuver** (cephalic replacement). *Zavanelli → Gaskin → Rubin → McRoberts* - This sequence is incorrect because the **Zavanelli maneuver** (cephalic replacement) is the absolute last step, only considered after all other maneuvers have failed due to its high associated morbidity. - The crucial and simple first-line maneuver, the **McRoberts maneuver**, is incorrectly placed as the final step in this order. *Rubin → McRoberts → Zavanelli → Gaskin* - The **McRoberts maneuver** is typically performed first along with suprapubic pressure, as it often provides adequate space and disimpaction before internal rotation techniques like Rubin. - The **Zavanelli maneuver** must always be attempted after non-invasive positional changes like the **Gaskin maneuver** (on all fours) have been tried and failed. *Gaskin → McRoberts → Rubin → Zavanelli* - The **McRoberts maneuver** is universally the first physical maneuver attempted after calling for help and assessing the need for episiotomy, so it generally precedes the **Gaskin maneuver**. - While effective, the Gaskin maneuver (assuming the all-fours position) requires repositioning the mother and is usually attempted after the simpler positional change of McRoberts fails.

Q: A 32-year-old G2P1 woman with a previous cesarean section is undergoing a trial of vaginal delivery at 39 weeks. She is in active labor with 8 cm cervical dilation and fetal station at -1. Continuous fetal monitoring reveals fetal bradycardia, and maternal pulse is 110/min. What is the most appropriate next step in management?

Emergency cesarean section. ***Emergency cesarean section*** - The combination of **fetal bradycardia** (acute distress) and maternal **tachycardia** (suggesting hemorrhage/shock) in a patient undergoing **trial of labor after C-section (TOLAC)** is highly indicative of **uterine rupture**. - Uterine rupture is a **Category I obstetric emergency** requiring immediate delivery to minimize fetal hypoxia/demise and manage maternal bleeding. *Continue monitoring and wait* - Waiting is dangerous and contraindicated in the presence of non-reassuring fetal tracing (bradycardia) combined with signs pathognomonic for **uterine rupture** (maternal tachycardia). - Any delay in delivery and surgical intervention significantly increases the risk of associated maternal and fetal **morbidity and mortality**. *Administer oxytocin to augment labor* - Oxytocin is absolutely contraindicated when **uterine rupture** is suspected, as increasing uterine contractility will exacerbate the tear, potentially worsening fetal compromise and maternal hemorrhage. - Augmentation would be appropriate only if labor was prolonged and vital signs were reassuring, which is not the case here. *Perform operative vaginal delivery* - The fetal station is still high at **-1**, making an immediate or easy operative vaginal delivery unlikely or risky. - The primary goal is immediate access to the uterus to control bleeding and deliver the fetus, which is best achieved via an **emergency laparotomy** (C-section).

Q: Identify the maneuver shown in the image.

Leopold maneuvers. ***Leopold maneuvers*** - **Leopold maneuvers** are the comprehensive set of **four systematic abdominal palpation techniques** used to assess fetal position, presentation, lie, and engagement. - This is the correct answer as it encompasses **all four maneuvers** shown in the image, rather than referring to just one specific technique. *Pawlik grip* - This refers specifically to the **third Leopold maneuver** only, which assesses the presenting part at the pelvic inlet. - Too narrow in scope as it doesn't encompass the complete systematic examination shown. *Fundal grip* - This refers specifically to the **first Leopold maneuver** only, which determines the fetal part occupying the fundus. - Incorrect because it represents only one component of the complete four-step examination technique. *Pelvic grip* - This refers specifically to the **fourth Leopold maneuver** only, which assesses fetal engagement and descent into the pelvis. - Too specific as it doesn't represent the entire systematic abdominal palpation sequence demonstrated.

Q: Which technique of intrapartum fetal monitoring is shown here?

Fetal scalp pH sampling. ***Fetal scalp pH sampling*** - The image shows a device inserted through the cervix to the fetus's scalp, suggesting a procedure to obtain a sample, characteristic of **fetal scalp pH sampling**. - This technique is used to assess fetal well-being by directly measuring the pH of a small blood sample from the fetal scalp, typically in cases of ambiguous or non-reassuring cardiotocography (CTG) patterns. *Cardiotocography* - **Cardiotocography (CTG)** involves external transducers placed on the maternal abdomen to monitor fetal heart rate and uterine contractions, which is not depicted in the image. - While CTG is a primary method of fetal monitoring, the illustrative setup here does not represent its application. *Fetal pulse oximetry* - **Fetal pulse oximetry** would involve a sensor placed on the fetal face or head to measure oxygen saturation directly, but the device shown is designed for blood sampling, not continuous oxygen monitoring. - This technique is less commonly used and involves a different type of sensor and placement. *Fetal movement monitor* - A **fetal movement monitor** typically relies on maternal perception or external sensors for detecting fetal activity, which is not what the invasive device in the image is designed to do. - This method is usually non-invasive and does not involve direct contact with the fetal scalp for sampling.

Q: Which degree of obstetric anal sphincter injury is seen here?

Third degree. ***Third degree*** - The image shows a laceration involving the **anal sphincter complex** but the **anal epithelium** is intact. - This corresponds to a **third-degree** tear, where the external and/or internal anal sphincter is torn but the mucosa is preserved. *First degree* - This degree of tear involves only the **perineal skin** and **vaginal mucosa**, without affecting underlying fascia or muscle. - The image clearly shows involvement of the anal sphincter, which is beyond a first-degree tear. *Second degree* - This involves the **perineal muscles** but the **anal sphincter** is intact. - The image illustrates that the anal sphincter itself is torn, not just the perineal muscles superficial to it. *Fourth degree* - This is the most severe tear, involving the **anal sphincter complex** and extending through the **anal epithelium** (mucosa) into the lumen of the rectum. - In the depicted image, the anal epithelium appears to be intact, differentiating it from a fourth-degree injury.

Q: Which of the following causes of dysfunctional labour is shown below?

Bandl's ring. ***Bandl's ring*** - The image shows a **pathological retraction ring (Bandl's ring)**, which is an abnormal constriction of the uterus at the junction of the upper contracting segment and the lower passively dilating segment. The black arrow clearly points to the constriction. - This ring occurs when there is prolonged obstructed labor, indicating impending **uterine rupture** due to excessive thinning of the lower uterine segment. - Bandl's ring is a **sign of obstructed labor** and requires immediate intervention to prevent uterine rupture. *Uterine tetany* - **Uterine tetany** refers to excessively frequent and strong uterine contractions that are not effectively coordinated for labor progression. - This condition affects the overall uterine muscle tone and contraction pattern, rather than forming a distinct constricting ring as depicted. *Cervical dystocia* - **Cervical dystocia** is a failure of the cervix to dilate adequately, despite effective uterine contractions. - While it prolongs labor, it is a problem with cervical thinning and opening, not a physical constriction ring within the body of the uterus. *Uterine inertia* - **Uterine inertia** describes weak or infrequent uterine contractions, leading to slow or arrested labor progression. - This is characterized by a lack of effective contractile force, an entirely different issue from the pathological retraction ring shown, which indicates strong but ineffective contractions above the constriction.

Q: The following delivery is seen with which type of pelvis?

Anthropoid pelvis. ***Anthropoid pelvis*** - This image illustrates the typical presentation of an **anthropoid pelvis**, characterized by an **oval-shaped inlet** that is wider from front to back than side to side. - This pelvic shape often facilitates a persistent **occiput posterior (OP)** position of the fetal head, as seen in the superior image, due to the longer anteroposterior diameter. *Gynecoid pelvis* - The **gynecoid pelvis** is considered the classic female pelvis, with a **rounded, slightly oval inlet** and a well-suited shape for vaginal delivery, allowing for normal fetal rotation. - It does not typically result in the persistent occiput posterior presentation and the more anterior/posterior orientation of the fetal skull shown. *Android pelvis* - An **android pelvis** has a **heart-shaped inlet** and prominent ischial spines, making it less favorable for vaginal delivery, often requiring descent in an occiput posterior position but with a narrower subpubic arch. - This type of pelvis is associated with higher rates of C-sections due to potential for cephalopelvic disproportion, and the fetal head typically encounters more difficulty at the outlet. *Platypelloid pelvis* - The **platypelloid pelvis** is characterized by a **flattened oval inlet** with a wide transverse diameter and a short anteroposterior diameter, making it the least common and least favorable for vaginal delivery. - This shape often results in the fetal head entering in a transverse arrest position, rather than the anteroposterior orientation suggested by the image.

Q: The image shows:

Rachitic pelvis. ***Rachitic pelvis*** - The image illustrates a **flattened anteroposterior diameter** and a **pronounced protrusion of the sacrum** into the pelvic cavity. - These features are characteristic of a rachitic pelvis, which results from **rickets** (vitamin D deficiency) in childhood, leading to softened bones and deformities due to gravitational and muscular forces. *Scoliotic pelvis* - A scoliotic pelvis would show **asymmetry** in the pelvic bones due to **lateral curvature of the spine**, which is not the primary symmetrical flattening seen here. - This condition involves a **twisting or rotation** of the pelvis, rather than the anteroposterior compression depicted. *Osteomalacic pelvis* - An osteomalacic pelvis, while also due to poor bone mineralization, typically presents with a **triradiate or trefoil shape** resulting from indentation of the acetabula and collapse of the sacrum into the pelvic canal, leading to a **heart-shaped inlet**. - While related to vitamin D deficiency, the specific deformation pattern in the image with characteristic flattening is more indicative of a rachitic pelvis from childhood rather than adult-onset osteomalacia. *Naegele pelvis* - A Naegele pelvis is an **obliquely contracted pelvis** characterized by **atrophy or absence of one sacral ala** and ankylosis of the corresponding sacroiliac joint. - This results in a highly asymmetrical, severely distorted pelvic inlet, which is distinct from the symmetrical flattening observed in the image.

Q: The following diameter is called \qquad and engages in \qquad presentation.

Suboccipitofrontal, Vertex. ***Suboccipitofrontal, Vertex*** - The diagram shows the **suboccipitofrontal diameter**, which extends from the junction of the occiput and neck to the frontal prominence (glabella). - This diameter measures approximately **10 cm** and engages in a **partially deflexed vertex presentation**. - This is one of the common engaging diameters in vertex presentations when the head is not fully flexed. *Submentobregmatic, Vertex* - The **submentobregmatic diameter** measures from the junction of the chin and neck to the bregma (anterior fontanelle). - This diameter measures approximately **9.5 cm** but engages in **face presentation, NOT vertex presentation**. - This is a critical distinction in obstetric terminology - submentobregmatic diameter is associated with face presentation. *Mentovertical, Brow* - The **mentovertical diameter** runs from the chin to the highest point of the skull (vertex). - This is the largest anteroposterior diameter of the fetal skull measuring approximately **13.5 cm**. - It is characteristic of **brow presentation**, which is often non-deliverable vaginally and may require cesarean section. *Supersubparietal, Face* - The term **supersubparietal** is not a standard fetal skull diameter used in obstetric literature. - Face presentation involves engagement of the **submentobregmatic diameter** (9.5 cm), not this non-existent diameter.

Question 1

In managing shoulder dystocia during vaginal delivery, which of the following is the correct sequence of maneuvers?

Accepted Answer

McRoberts → Rubin → Gaskin → Zavanelli

Answer

Gaskin → McRoberts → Rubin → Zavanelli

Answer

Zavanelli → Gaskin → Rubin → McRoberts

Answer

Rubin → McRoberts → Zavanelli → Gaskin

Question 2

A 32-year-old G2P1 woman with a previous cesarean section is undergoing a trial of vaginal delivery at 39 weeks. She is in active labor with 8 cm cervical dilation and fetal station at -1. Continuous fetal monitoring reveals fetal bradycardia, and maternal pulse is 110/min. What is the most appropriate next step in management?

Accepted Answer

Emergency cesarean section

Answer

Administer oxytocin to augment labor

Answer

Perform operative vaginal delivery

Answer

Continue monitoring and wait

Question 3

A 38-week pregnant woman in active labor with 5 cm cervical dilatation and regular contractions suddenly develops umbilical cord prolapse. What is the most appropriate immediate management?

Accepted Answer

Manually elevate the presenting part, fill the bladder retrogradely, and prepare for emergency cesarean section

Answer

Perform vaginal packing to protect the cord

Answer

Administer oxytocin to expedite labor

Answer

Wait and observe

Question 4

Identify the maneuver shown in the image.

Accepted Answer

Leopold maneuvers

Answer

Pawlik grip

Answer

Fundal grip

Answer

Pelvic grip

Question 5

Which technique of intrapartum fetal monitoring is shown here?

Accepted Answer

Fetal scalp pH sampling

Answer

Cardiotocography

Answer

Fetal pulse oximetry

Answer

Fetal movement monitor

Question 6

Which degree of obstetric anal sphincter injury is seen here?

Accepted Answer

Third degree

Answer

First degree

Answer

Second degree

Answer

Fourth degree

Question 7

Which of the following causes of dysfunctional labour is shown below?

Accepted Answer

Bandl's ring

Answer

Uterine tetany

Answer

Cervical dystocia

Answer

Uterine inertia

Question 8

The following delivery is seen with which type of pelvis?

Accepted Answer

Anthropoid pelvis

Answer

Gynecoid pelvis

Answer

Android pelvis

Answer

Platypelloid pelvis

Question 9

The image shows:

Accepted Answer

Rachitic pelvis

Answer

Scoliotic pelvis

Answer

Osteomalacic pelvis

Answer

Naegele pelvis

Question 10

The following diameter is called \qquad and engages in \qquad presentation.

Accepted Answer

Suboccipitofrontal, Vertex

Answer

Mentovertical, Brow

Answer

Submentobregmatic, Vertex

Answer

Supersubparietal, Face

Labor and Delivery — MCQs

Labor and Delivery — MCQs

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