Labor and Delivery Practice Questions

Q: Which maneuver is not performed for shoulder dystocia?

Mauriceau-Smellie-Veit technique. ***Mauriceau-Smellie-Veit technique*** - This technique is a maneuver used in the delivery of the **aftercoming head** in a **breech presentation**, not for shoulder dystocia. - It involves **flexing the fetal head** upon the chest to facilitate delivery, often requiring an assistant to apply pressure above the symphysis. *McRoberts maneuver* - The **McRoberts maneuver** is a common and effective initial intervention for shoulder dystocia, involving hyperflexion of the mother's hips towards her abdomen [1]. - This action changes the **pelvic tilt**, rotating the symphysis pubis superiorly to free the impacted shoulder [1]. *Wood's maneuver* - **Wood's maneuver** is a technique used to resolve shoulder dystocia, where the posterior shoulder is rotated to a more oblique diameter within the maternal pelvis [1]. - This involves applying pressure to the posterior aspect of the fetal clavicle to spin the shoulder. *Zavanelli maneuver* - The **Zavanelli maneuver** is a rare and extreme intervention for severe shoulder dystocia, involving the **replacement of the fetal head back into the uterus** for subsequent cesarean delivery. - It involves head flexion, reverse rotation, and pushing the head back into the vagina to allow for a laparotomy.

Q: What is the first-line maneuver for management of shoulder dystocia?

Sharp flexion of hip joints towards abdomen. ***Sharp flexion of hip joints towards abdomen*** - This maneuver, known as the **McRoberts maneuver**, widens the anterior-posterior diameter of the **pelvis** and flattens the sacrum. - It increases the likelihood of dislodging the impacted fetal shoulder from behind the symphysis pubis. *Supra pubic pressure* - **Suprapubic pressure** is applied to the fetal anterior shoulder to dislodge it from the symphysis pubis and guide it under the maternal pubic bone. - This maneuver is typically performed *in conjunction with* the McRoberts maneuver, but the question specifies "sharp flexion of hip joints towards abdomen," which is McRoberts alone. *90 degree rotation of posterior shoulder* - This describes the **Woods screw maneuver**, which involves rotating the posterior shoulder to facilitate delivery. It is a secondary maneuver used if McRoberts and suprapubic pressure are insufficient. - The question asks for the primary management step, and the McRoberts maneuver (sharp flexion) is usually the first line of intervention. *Emergency c-section* - An **emergency C-section** is generally not indicated for the acute management of shoulder dystocia once the head has delivered, as it is a **delivery complication** happening during vaginal birth. - Management focuses on specific maneuvers to release the impacted shoulders through the vagina.

Q: X-ray pelvimetry is indicated in all the following except:

Severe CPD. ***Severe CPD*** - **X-ray pelvimetry is NOT routinely indicated** for suspected cephalopelvic disproportion (CPD) in modern obstetric practice. - CPD is best assessed through **trial of labor** with continuous monitoring rather than radiological measurements. - Studies have shown that **X-ray pelvimetry does not improve outcomes** in cases of suspected CPD and exposes the fetus to unnecessary radiation. - Clinical assessment and progress of labor are more reliable indicators for decision-making regarding mode of delivery. *Osteomalacia* - **Osteomalacia** causes defective bone mineralization leading to **bone softening and pelvic deformities** (triradiate or trefoil pelvis). - X-ray pelvimetry **is indicated** to assess the degree of **pelvic architectural distortion** that may complicate vaginal delivery. - This represents a classic indication for pelvimetry when **skeletal disease affects pelvic structure**. *Breech presentation in vaginal delivery* - In **breech presentation**, X-ray pelvimetry has historically been used to assess pelvic adequacy before attempting vaginal delivery. - It helps evaluate pelvic dimensions to determine if there is sufficient space for safe vaginal breech delivery. - Although **controversial in modern practice** (ultrasound and clinical assessment preferred), this remains a **traditional indication** in many textbooks. *Outlet obstruction* - X-ray pelvimetry **is indicated** when there is suspicion of **pelvic outlet narrowing** due to skeletal abnormalities. - Precise measurement of outlet dimensions helps determine whether vaginal delivery is feasible or if cesarean section is necessary. - This is particularly relevant in cases of **previous pelvic trauma or congenital pelvic deformities**.

Q: In the context of assessing pelvic adequacy during childbirth, which diameter is considered the shortest diameter of the female pelvic inlet?

Obstetric conjugate. ***Obstetric conjugate*** - The **obstetric conjugate** typically measures around **11 cm** and is the shortest anteroposterior diameter of the pelvic inlet. - It represents the distance from the **midpoint of the sacral promontory** to the **innermost aspect of the symphysis pubis**, directly related to the space available for the fetal head to engage. *Diagonal conjugate* - The **diagonal conjugate** is measured clinically by vaginal examination, from the **lower border of the symphysis pubis** to the **sacral promontory**. - It is typically **1.5-2 cm longer** than the obstetric conjugate (around 12.5 cm) and is used to *estimate* the obstetric conjugate. *True conjugate* - The **true conjugate**, also known as the anatomical conjugate, extends from the **upper border of the symphysis pubis** to the **sacral promontory**. - It is usually about **0.5-1 cm longer** than the obstetric conjugate, making it not the shortest diameter. *None of the options* - This option is incorrect because the **obstetric conjugate** is indeed the shortest diameter of the female pelvic inlet.

Q: Which Bishop score component specifically measures cervical opening (dilation)?

Cervical dilation. ***Cervical dilation*** - **Cervical dilation** directly refers to the opening of the cervix, measured in centimeters, and is a key component of the Bishop score. - The degree of dilation indicates the progression of labor and the readiness of the cervix for delivery. *Fetal station* - **Fetal station** measures the descent of the fetal head relative to the maternal ischial spines, not the cervical opening itself. - It helps determine how far the fetus has moved into the birth canal. *Cervical consistency* - **Cervical consistency** assesses the firmness or softness of the cervix, indicating its readiness to dilate and efface. - A softer cervix is more favorable for induction and labor, but it does not directly measure the opening. *Cervical effacement* - **Cervical effacement** measures the thinning and shortening of the cervix, expressed as a percentage. - While related to cervical readiness, it is distinct from dilation, which refers to the widening of the cervical os.

Q: Which of the following options include cardinal movements that occur during labor?

Descent, Flexion, Internal Rotation. ***Descent, Flexion, Internal Rotation*** - These are three of the **seven cardinal movements** of labor, which ensure the **optimal passage** of the fetus through the birth canal. - The seven cardinal movements are: **Engagement, Descent, Flexion, Internal Rotation, Extension, External Rotation (Restitution), and Expulsion**. - These movements occur sequentially or in combination, adapting the fetal head and body to the **pelvic diameters**. *Engagement* - While engagement is indeed a **cardinal movement** (the first one), the question asks which options include cardinal movements in a broader context. - Engagement alone refers to the **descent of the widest diameter** of the fetal presenting part to a level below the pelvic inlet. *Shoulder Dystocia* - **Shoulder dystocia** is a **complication of labor** where the anterior shoulder impacts behind the maternal pubic symphysis, NOT a cardinal movement. - It requires specific **obstetric maneuvers** to resolve and prevent fetal injury. *External Rotation* - **External rotation (restitution)** is indeed one of the cardinal movements, occurring after delivery of the head when it rotates to align with the shoulders. - However, in the context of this question, Option B provides a more comprehensive representation of multiple sequential cardinal movements.

Q: In cases of an unstable lie of the fetus, which part of the uterus is most commonly associated?

Lower uterine segment. ***Lower uterine segment*** - An unstable lie, where the fetus changes presentation frequently, is often associated with abnormalities of the **lower uterine segment**. - A relaxed or distended lower uterine segment due to grand multiparity or other factors can prevent the fetal head from engaging, leading to an **unstable lie**. *Cornual region* - The cornual region is where the **fallopian tubes** enter the uterus and is more commonly associated with conditions like **cornual pregnancy**, not typically an unstable fetal lie. - Pathologies here would generally lead to localized pain or rupture, not a global change in fetal position. *Lateral wall region* - Issues with the lateral uterine wall, such as **fibroids** or **abnormal placentation**, can sometimes influence fetal position but are not the primary or most common cause of an **unstable lie**. - It is less directly involved in fetal engagement and stabilization compared to the lower segment. *Fundal region* - The fundal region is the top part of the uterus, where most **uterine contractions** originate and where the bulk of the fetus typically resides in a normal presentation. - Abnormalities in the fundus are more likely to cause **malpresentations** or difficulty with contractions during labor, rather than an unstable lie itself.

Q: What is the pressure inside the uterus during the second stage of labor?

Normal range: 100-120 mm of Hg. ***Normal range: 100-120 mm of Hg*** - During the **second stage of labor**, uterine contractions become stronger and more frequent to expel the fetus, typically generating pressures in the range of **100-120 mm Hg**. - This pressure, combined with maternal pushing effort, is necessary for **fetal descent** and delivery through the birth canal. *High range: 200-220 mm of Hg* - Pressures in this range are **higher than typically observed** during normal, unassisted second-stage labor. - Such elevated pressures might indicate **hypertonic uterine dysfunction** or potentially increase the risk of uterine rupture or fetal distress if sustained. *Low range: 25 mm of Hg* - A pressure of **25 mm Hg** indicates very weak or infrequent contractions, which is insufficient for effective fetal expulsion during the second stage of labor. - This would be characteristic of **hypotonic uterine dysfunction**, often leading to a **protracted or arrested labor**. *Very high range: 300 - 400 mm of Hg* - Pressures this high are **extremely dangerous** and not compatible with a normal physiological labor process. - Such pressures would likely result in **uterine rupture**, severe fetal distress, or other life-threatening complications.

Question 1

Which maneuver is not performed for shoulder dystocia?

Accepted Answer

Mauriceau-Smellie-Veit technique

Answer

Wood's maneuver

Answer

Zavanelli maneuver

Answer

McRoberts maneuver

Question 2

What is the first-line maneuver for management of shoulder dystocia?

Accepted Answer

Sharp flexion of hip joints towards abdomen

Answer

90 degree rotation of posterior shoulder

Answer

Emergency c-section

Answer

Supra pubic pressure

Question 3

X-ray pelvimetry is indicated in all the following except:

Accepted Answer

Severe CPD

Answer

Osteomalacia

Answer

Breech presentation in vaginal delivery

Answer

Outlet obstruction

Question 4

In the context of assessing pelvic adequacy during childbirth, which diameter is considered the shortest diameter of the female pelvic inlet?

Accepted Answer

Obstetric conjugate

Answer

Diagonal conjugate

Answer

True conjugate

Answer

None of the options

Question 5

Which Bishop score component specifically measures cervical opening (dilation)?

Accepted Answer

Cervical dilation

Answer

Cervical consistency

Answer

Fetal station

Answer

Cervical effacement

Question 6

Which of the following options include cardinal movements that occur during labor?

Accepted Answer

Descent, Flexion, Internal Rotation

Answer

Engagement

Answer

Shoulder Dystocia

Answer

External Rotation

Question 7

In cases of an unstable lie of the fetus, which part of the uterus is most commonly associated?

Accepted Answer

Lower uterine segment

Answer

Cornual region

Answer

Lateral wall region

Answer

Fundal region

Question 8

What is the pressure inside the uterus during the second stage of labor?

Accepted Answer

Normal range: 100-120 mm of Hg

Answer

High range: 200-220 mm of Hg

Answer

Low range: 25 mm of Hg

Answer

Very high range: 300 - 400 mm of Hg

Labor and Delivery — MCQs

Labor and Delivery — MCQs

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