Operative Obstetrics Practice Questions

Q: Forceps delivery is indicated in all the following conditions except?

Mentoposterior presentation. **Explanation:** The correct answer is **A. Mentoposterior presentation**. In this position, the fetal chin (mentum) is directed toward the maternal sacrum. Because the fetal neck is already at maximal extension, it cannot extend further to negotiate the pelvic curve. This results in a diameter (submentobregmatic) that is too large to pass through the pelvis, making vaginal delivery impossible. Forceps application is strictly **contraindicated** here; the management of choice is a Cesarean section. **Analysis of other options:** * **B. Deep transverse arrest:** This occurs when the head is arrested in the transverse diameter at the level of the ischial spines. Forceps (specifically Kielland’s forceps) can be used to rotate the head to an occipito-anterior position and effect delivery. * **C. After the head has crowned:** This is the primary indication for **Outlet Forceps**. It is often used to shorten the second stage of labor or to control the delivery of the head to prevent perineal tears. * **D. Severe maternal heart disease:** Forceps are indicated here to **shorten the second stage of labor**, preventing the maternal exhaustion and Valsalva maneuvers that could lead to acute cardiac failure. **High-Yield Clinical Pearls for NEET-PG:** 1. **Prerequisites for Forceps:** Remember the mnemonic **FORCEPS**: **F**etus alive, **O**penned (dilated) cervix, **R**uptured membranes, **C**ephalo-pelvic disproportion absent, **E**ngaged head, **P**osition known, **S**ladder empty. 2. **Mento-Anterior (MA):** Unlike MP, a Mento-anterior presentation **can** be delivered vaginally with forceps. 3. **Classification:** Based on station and rotation, forceps are classified into **Outlet, Low, Mid, and High** (High forceps are now obsolete in modern obstetrics).

Q: During assisted vaginal delivery, where is the vacuum device typically applied?

3 cm anterior to the posterior fontanelle. ***3 cm anterior to the posterior fontanelle***- This exact point is known as the **flexion point** (or optimum traction point), which is essential for ensuring that traction causes the fetal head to flex, thus presenting the smallest diameter for delivery.- Applying the vacuum cup at the flexion point ensures that the pull is along the axis of the **fetal head**, minimizing cephalhematoma and increasing the efficacy of the vacuum pull.*At 3 cm behind the anterior fonatnelle*- This position corresponds to the **sinciput** and is too far forward on the fetal head.- Applying traction here could lead to **extension** of the fetal head, making delivery more difficult and increasing the risk of fetal injury or cap detachment.*On the posterior fontanelle*- Placing the cup directly on the **posterior fontanelle** is incorrect as it is a small, soft area and the application would be off-center from the optimal traction point.- This off-center placement could result in **deflecting** the fetal head upon traction, making the pull less effective and potentially causing scalp damage.*Between the anterior and posterior fontanelle*- While the ideal position lies along the sagittal suture between the fontanelles, this description is too vague and does not pinpoint the specific **flexion point** (3 cm anterior to the posterior fontanelle).- Vague placement often results in applied traction that is not fully conducive to optimal **head flexion** and descent.

Q: A pregnant woman with a short cervix undergoes a cervical cerclage procedure. The image shows a key step during the procedure. What is the most likely procedure being performed?

Modified Shirodkar. ***Modified Shirodkar*** - The image displays the dissection of the **vesicocervical mucosa** (bladder flap) which is a crucial step in the Shirodkar procedure, allowing the suture to be placed high on the cervix near the **internal os**. - This technique involves a submucosal placement of a non-absorbable suture (like Mersilene tape) which is then buried, providing better support for an incompetent cervix compared to lower-placed sutures. *Modified McDonald's* - The McDonald's procedure and its modifications are simpler techniques that place a **purse-string suture** around the cervix without any dissection of the cervical mucosa. - This procedure is less invasive but the suture is placed lower on the cervix, which might offer less support than a high cerclage like the Shirodkar. *McDonald's* - This is a transvaginal **purse-string suture** placed around the body of the cervix, cinching it closed. It is a common and relatively simple method of cerclage. - Crucially, it does not involve the **bladder dissection** shown in the image, which is the key differentiating feature of the Shirodkar technique. *Shirodkar* - While the procedure shown is a Shirodkar type, the **Modified Shirodkar** is the version most commonly performed today and is therefore the most precise answer. - The original Shirodkar technique often involved a permanent suture requiring a **cesarean delivery**, whereas the modified version uses a suture that can be removed to allow for a trial of vaginal delivery.

Q: A patient develops profuse uterine bleeding after a lower segment cesarean section (LSCS). Despite administration of oxytocin and other uterotonics, the bleeding continues. What is the 1st line conservative surgical management?

Uterine balloon tamponade. ***Uterine balloon tamponade*** - This is the **first-line conservative surgical intervention** when uterine atony persists despite maximum medical management (oxytocin, methylergometrine, carboprost, misoprostol). - Devices like the **Bakri balloon** are inserted rapidly to apply counter-pressure to the uterine walls, effectively halting bleeding in 80-90% of cases while preserving the uterus. - This is a **Tier 2 intervention** that bridges medical management and invasive surgical procedures. *Uterine artery embolization* - This specialized technique requires immediate availability of an **interventional radiology suite** and hemodynamically stable patient for transport. - It is typically pursued after conservative mechanical procedures (tamponade or compression sutures) have failed, or in specialized centers where it's immediately available. - Considered a **Tier 3 intervention**. *Internal iliac artery ligation* - This complex invasive surgical procedure is performed when simpler techniques like **balloon tamponade** or **B-Lynch compression sutures** have failed. - It is typically reserved as a step before hysterectomy, aimed at reducing pelvic blood flow. - Also a **Tier 3 intervention**. *Hysterectomy* - **Hysterectomy** is the **last-resort, life-saving measure** (Tier 4) when all conservative mechanical, surgical, and medical options have failed to control massive hemorrhage. - The goal is to implement conservative measures rapidly to **preserve fertility** before resorting to definitive surgery.

Q: This instrument is contraindicated for?

Obstructed labor. ***Obstructed labor*** - Using forceps in obstructed labor, such as in cases of **cephalopelvic disproportion (CPD)**, is absolutely contraindicated as it can cause severe maternal trauma like **uterine rupture** and significant fetal injury. - The definitive management for true obstructed labor is a **Caesarean section** to safely bypass the mechanical obstruction. *Caesarean section* - Wrigley's forceps are commonly used during a Caesarean section to assist in delivering the fetal head, especially when it is deeply engaged in the pelvis (a "lift-out" forceps application). - Therefore, a Caesarean section is an *indication* for the use of these specific forceps, not a contraindication. *After coming head of breech* - Forceps can be used to deliver the aftercoming head in a breech presentation to control delivery and prevent sudden decompression of the fetal head. **Piper's forceps** are specifically designed for this purpose. - This situation represents a specific indication for an assisted delivery, not a contraindication. *Occipital posterior position* - A persistent occiput posterior position can lead to a prolonged second stage of labor, which is a common indication for operative vaginal delivery. - Depending on the fetal head station, rotational forceps (like **Kielland's**) or outlet forceps (like **Wrigley's**) may be used to either rotate the head or deliver it directly in the posterior position.

Q: Which of the following is the process of breaking the clavicle during delivery?

Cleidotomy. ***Cleidotomy*** - This is a destructive obstetric procedure where the fetal clavicle is intentionally broken or cut to reduce the **bisacromial diameter**. It is utilized primarily in cases of severe, unrelieved **shoulder dystocia**, especially if the fetus has already succumbed (**Fetal demise**). *Craniotomy* - This is a destructive procedure aimed at reducing the size of the **fetal head** by crushing or perforating the skull. It is performed when the fetal head is impacted and delivery is otherwise impossible, usually only if there is **fetal demise**. *Symphysiotomy* - This procedure involves surgically incising the **fibrocartilage** of the **pubic symphysis** to widen the pelvic outlet. It is used to relieve **obstructed labor** due to minor cephalopelvic disproportion, allowing vaginal delivery. *Zavanelli manoeuvre* - This is an emergency procedure for severe **shoulder dystocia** where the delivered fetal head is pushed back into the birth canal (**cephalic replacement**). It mandates immediate delivery via **Cesarean section** following the replacement.

Q: Identify the following instrument used by obstetricians:

Outlet forceps. ***Outlet forceps*** - The instrument shown is a type of **outlet forceps**, specifically **Wrigley's forceps**, characterized by its short shanks and blades designed to minimize trauma. - These are used for **low-forceps deliveries** when the fetal head is visible on the perineum, requiring minimal traction and no rotation for delivery. *Kielland forceps* - **Kielland forceps** are primarily used for **rotational deliveries**, especially in cases of deep transverse arrest, and feature a minimal pelvic curve and a sliding lock. - The forceps in the image lack the characteristic sliding lock and long shanks of Kielland forceps. *Tucker Mclane forceps* - **Tucker-McLane forceps** have overlapping shanks and solid or pseudofenestrated blades, making them a type of classical forceps used for various mid-pelvic applications. - The instrument pictured has a distinctly different design with shorter components, not matching the Tucker-McLane structure. *Pipers forceps* - **Piper's forceps** are specialized instruments with long, curved shanks and a perineal curve, designed exclusively for delivering the **aftercoming head in a breech presentation**. - The forceps in the image are too short and lack the specific curvature required for managing a breech delivery.

Q: Which of the following is not an indication for a cesarean section?

Previous history of macrosomia. ***Previous history of macrosomia***- A previous history of **macrosomia** (birth weight >4000g) results in an increased risk of shoulder dystocia but is typically managed with careful monitoring and induction/elective C-section based on *estimated* fetal weight in the current pregnancy, not the history alone.- This is a risk factor, not an absolute primary indication for an elective C-section during the current pregnancy unless the estimated current fetal weight is excessive (e.g., >4500g or >5000g in specific circumstances) or there are other complicating factors (e.g., poorly controlled diabetes).*Absolute cephalopelvic disproportion*- **Absolute cephalopelvic disproportion (CPD)** means the fetal head cannot pass through the maternal pelvis, rendering vaginal delivery impossible and risking uterine rupture.- This condition is an absolute mechanical indication for C-section to ensure a safe delivery for both mother and fetus.*Central placenta previa*- **Central placenta previa** (or complete previa) involves the placenta completely covering the internal cervical os, blocking the birth canal.- Attempting vaginal delivery would lead to immediate and massive **uncontrollable hemorrhage** upon cervical effacement or dilation, thus mandating an elective C-section.*Advanced carcinoma cervix*- **Advanced carcinoma cervix** requires delivery via C-section, primarily to prevent severe, life-threatening hemorrhage and potential tumor fragmentation/seeding if vaginal delivery is attempted.- Additionally, the tumor mass mechanically obstructs the birth canal, often making vaginal delivery anatomically impossible or highly risky.

Q: In which of the following situations is ventouse not used?

Premature baby. ***Premature baby***- Ventouse traction carries a substantially higher risk of **neonatal intracranial hemorrhage** and **cephalhematoma** in premature infants due to the greater fragility and softness of the fetal skull and vasculature.- Vacuum extraction is generally contraindicated for fetuses less than **36 weeks gestation** or those weighing less than **2,500 grams**.*Prolonged second stage*- This represents a failure to progress during the expulsive phase of labor and is a primary indication for operative delivery to prevent adverse outcomes.- Ventouse is often preferred in cases of **arrest of descent** or prolonged pushing efforts, provided the cervix is fully dilated and the station is appropriate.*Maternal exhaustion*- This is a common indication for operative vaginal delivery, suggesting the mother is too fatigued to generate effective pushing efforts, leading to potential delivery stagnation.- Ventouse assists in shortening the second stage, thereby conserving maternal energy and reducing the risk associated with lengthy, ineffective pushing efforts.*Fetal distress*- Acute signs of **fetal compromise** (e.g., severe fetal bradycardia or late decelerations) necessitate the rapid termination of labor, often through operative vaginal delivery.- Ventouse is one of the methods used to achieve a quick and safe delivery when the fetal heart rate is non-reassuring and the fetal head is engaged.

Q: A pregnant woman is undergoing a vaginal breech delivery. After delivering the baby's body up to the umbilicus, the obstetrician notices winging of the baby's scapula. To facilitate safe delivery of the baby's shoulders and head, which of the following maneuvers is most appropriate?

Lovset maneuver. ***Lovset maneuver*** - The clinical sign of **winging of the scapula** indicates a **nuchal arm** (arm trapped behind the baby's head), which is a specific complication during breech delivery. - The Lovset maneuver is specifically designed to deliver nuchal arms and impacted **shoulders** in breech presentation by causing the posterior shoulder to rotate anteriorly under the symphysis pubis. - The obstetrician achieves this by grasping the baby's pelvis and rotating the trunk **180 degrees** while applying **gentle downward traction**, which releases the trapped arm and allows delivery of the shoulders. *Pinard maneuver* - This maneuver is used to deliver the **legs** when they are extended in breech presentation, by flexing the thigh and performing **outward sweeping** pressure in the popliteal fossa. - It is performed earlier in the delivery to address extended legs, not for addressing nuchal arm or shoulder complications after the body has reached the level of the umbilicus. *Burns Marshall maneuver* - This technique is used for delivery of the **aftercoming head** when the head is already flexed; the baby's body is allowed to **hang down** until the nape of the neck appears under the symphysis pubis. - It is inappropriate at this stage, as the shoulders and nuchal arm must be delivered first before the head is addressed. *Mauriceau-Smellie-Veit maneuver* - This maneuver is specifically designed for the safe delivery and **flexion of the aftercoming head**, using the operator's hand within the vagina to flex the head while applying traction on the baby's shoulders. - The primary concern here is the **delivery of the nuchal arm and shoulders**, which must precede the use of any maneuver for the aftercoming head.

Question 1

Forceps delivery is indicated in all the following conditions except?

Accepted Answer

Mentoposterior presentation

Answer

Deep transverse arrest

Answer

After the head has crowned

Answer

Severe maternal heart disease

Question 2

During assisted vaginal delivery, where is the vacuum device typically applied?

Accepted Answer

3 cm anterior to the posterior fontanelle

Answer

Between the anterior and posterior fontanelle

Answer

On the posterior fontanelle

Answer

At 3 cm behind the anterior fontanelle

Question 3

A pregnant woman with a short cervix undergoes a cervical cerclage procedure. The image shows a key step during the procedure. What is the most likely procedure being performed?

Accepted Answer

Modified Shirodkar

Answer

Shirodkar

Answer

Modified McDonald's

Answer

McDonald's

Question 4

A patient develops profuse uterine bleeding after a lower segment cesarean section (LSCS). Despite administration of oxytocin and other uterotonics, the bleeding continues. What is the 1st line conservative surgical management?

Accepted Answer

Uterine balloon tamponade

Answer

Hysterectomy

Answer

Internal iliac artery ligation

Answer

Uterine artery embolization

Question 5

This instrument is contraindicated for?

Accepted Answer

Obstructed labor

Answer

After coming head of breech

Answer

Caesarean section

Answer

Occipital posterior position

Question 6

Which of the following is the process of breaking the clavicle during delivery?

Accepted Answer

Cleidotomy

Answer

Zavanelli manoeuvre

Answer

Craniotomy

Answer

Symphysiotomy

Question 7

Identify the following instrument used by obstetricians:

Accepted Answer

Outlet forceps

Answer

Tucker-McLane forceps

Answer

Kielland forceps

Answer

Piper's forceps

Question 8

Which of the following is not an indication for a cesarean section?

Accepted Answer

Previous history of macrosomia

Answer

Central placenta previa

Answer

Absolute cephalopelvic disproportion

Answer

Advanced carcinoma cervix

Question 9

In which of the following situations is ventouse not used?

Accepted Answer

Premature baby

Answer

Maternal exhaustion

Answer

Prolonged second stage

Answer

Fetal distress

Question 10

A pregnant woman is undergoing a vaginal breech delivery. After delivering the baby's body up to the umbilicus, the obstetrician notices winging of the baby's scapula. To facilitate safe delivery of the baby's shoulders and head, which of the following maneuvers is most appropriate?

Accepted Answer

Lovset maneuver

Answer

Burns Marshall maneuver

Answer

Pinard maneuver

Answer

Mauriceau-Smellie-Veit maneuver

Operative Obstetrics — MCQs

Operative Obstetrics — MCQs

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