Operative Obstetrics Practice Questions

Q: During suction and evacuation, there is a perforation of the uterus. What is the next step?

Laparotomy. **Explanation:** Uterine perforation is a serious complication of suction and evacuation (S&E). The management depends on the clinical scenario, but in the context of a **suction procedure**, the risk of visceral injury is high. **Why Laparotomy is the Correct Choice:** When perforation occurs during suction and evacuation, there is a significant risk that the suction cannula or forceps has entered the peritoneal cavity and injured the **bowel, bladder, or major blood vessels**. A **laparotomy** is the gold standard because it allows for a full, systematic exploration of the abdominal cavity to identify and repair any visceral injuries, control hemorrhage, and ensure the uterus is completely evacuated under direct visualization. **Analysis of Incorrect Options:** * **Laparoscopy (A):** While laparoscopy can be used for stable patients with suspected "silent" perforations (e.g., during a simple D&C), it is generally avoided if a suction cannula was used, as bowel injuries can be extensive and difficult to manage laparoscopically in an emergency setting. * **Hysterotomy (B):** This involves cutting into the uterus to remove the fetus. It does not address the primary concern of potential extra-uterine visceral damage caused by the perforation. * **Hysterectomy (D):** This is a radical measure reserved only for cases where the uterine damage is irreparable or there is uncontrollable life-threatening hemorrhage. It is not the immediate "next step." **High-Yield Clinical Pearls for NEET-PG:** * **Most common site of perforation:** The uterine fundus. * **Immediate Sign:** Sudden "loss of resistance" or the instrument passing deeper than the measured uterine sound. * **Management Rule:** If perforation occurs with a **blunt instrument** (uterine sound) in a stable patient, observation is acceptable. If it occurs with a **suction cannula or sharp curette**, surgical exploration (Laparotomy) is mandatory to rule out bowel injury.

Q: What is the recommended time frame for performing a perimortem Cesarean section in a pregnant female experiencing cardiac arrest?

4 minutes. **Explanation:** The management of maternal cardiac arrest follows the **"4-minute rule."** In a pregnant female (typically >20 weeks gestation), the gravid uterus causes significant aortocaval compression, reducing venous return and making effective Cardiopulmonary Resuscitation (CPR) nearly impossible. **1. Why 4 minutes is correct:** The goal is to initiate the Perimortem Cesarean Delivery (PMCD)—now often termed Resuscitative Hysterotomy—within **4 minutes** of cardiac arrest if there is no Return of Spontaneous Circulation (ROSC). The objective is to achieve delivery by the **5th minute**. Emptying the uterus relieves aortocaval compression, increasing venous return by approximately 30-80%, which significantly improves the chances of maternal resuscitation and fetal survival. **2. Analysis of Incorrect Options:** * **B (5 minutes):** This is the target time for **completion** of the delivery, not the initiation. Delaying the start until 5 minutes reduces the likelihood of maternal neurological recovery. * **C & D (8 and 10 minutes):** These timeframes are associated with irreversible maternal brain damage and a high probability of fetal demise or severe hypoxic-ischemic encephalopathy. **High-Yield Clinical Pearls for NEET-PG:** * **Indication:** Perform if the fundus is at or above the umbilicus (approx. ≥20 weeks) and ROSC is not achieved within 4 minutes. * **Location:** Do not move the patient; perform the procedure at the site of arrest. * **LUD:** Manual Left Uterine Displacement should be maintained during CPR until the fetus is delivered. * **Survival:** PMCD is primarily a **resuscitative procedure for the mother**, though it also offers the best chance for the fetus if performed rapidly.

Q: In a deep transverse arrest, delivery of the baby is conducted by:

All of the above. **Explanation:** **Deep Transverse Arrest (DTA)** occurs when the fetal head is arrested in the transverse position at or below the level of the ischial spines (the pelvic outlet or mid-cavity) for more than one hour. This is typically due to a failure of internal rotation, often associated with an android or anthropoid pelvis. **Why "All of the Above" is Correct:** The management of DTA depends on the clinical assessment of the mother and fetus, the station of the head, and the expertise of the obstetrician: 1. **Cesarean Section:** This is the safest and most common modern management, especially if there are signs of cephalopelvic disproportion (CPD), fetal distress, or if the operator is not skilled in instrumental rotation. 2. **Kielland’s Forceps:** These are specialized non-fenestrated forceps with a sliding lock designed specifically for **rotation and extraction** of the fetal head in DTA. 3. **Manual Rotation:** The clinician attempts to rotate the head to an Occipito-Anterior (OA) position by hand, followed by delivery using standard forceps (e.g., Wrigley’s or Simpson’s). 4. **Vacuum Extraction (Ventouse):** The vacuum can be applied to facilitate rotation (autocorrection) and traction, provided the head is at a low station. **Clinical Pearls for NEET-PG:** * **Definition:** Arrest of labor where the sagittal suture is in the transverse diameter at the level of the ischial spines. * **Prerequisites for Instrumental Delivery:** Cervix must be fully dilated, membranes ruptured, and no significant CPD. * **High-Yield Fact:** Kielland’s forceps are the "gold standard" instrument for DTA because they lack a pelvic curve, allowing safe rotation within the birth canal. * **Modern Trend:** Due to the high risk of maternal/fetal trauma with mid-cavity rotations, **Cesarean Section** is increasingly preferred in clinical practice.

Q: During delivery, an episiotomy is performed. The tear extends through the rectal sphincter, but the rectal mucosa remains intact. How would you classify this type of episiotomy?

Third-degree. **Explanation:** The classification of perineal tears (and episiotomy extensions) is based on the anatomical structures involved. This question describes a tear involving the **anal sphincter complex** while sparing the underlying mucosa, which is the hallmark of a **Third-degree perineal tear**. **Breakdown of the Classification:** * **Third-degree (Correct):** This involves injury to the perineum that extends through the perineal muscles and involves the **External Anal Sphincter (EAS)** and/or the **Internal Anal Sphincter (IAS)**. Since the rectal mucosa is specifically mentioned as **intact**, it remains a third-degree injury. * **First-degree (Incorrect):** This is limited to the fourchette, perineal skin, and vaginal mucous membrane. It does not involve the underlying fascia or muscles. * **Second-degree (Incorrect):** This extends beyond the skin into the fascia and muscles of the **perineal body** (e.g., bulbocavernosus, transverse perineal muscles) but does *not* involve the anal sphincter. * **Fourth-degree (Incorrect):** This is the most severe form, where the injury extends through the anal sphincter complex (EAS and IAS) and involves the **anal epithelium/rectal mucosa**, creating a communication between the vagina and the rectum. **NEET-PG High-Yield Pearls:** 1. **Sultan’s Classification:** Third-degree tears are further sub-divided: * **3a:** 50% of EAS thickness torn. * **3c:** Both EAS and IAS are torn. 2. **Timing:** Episiotomy is ideally performed during the crowning of the head (second stage of labor). 3. **Repair:** Third and fourth-degree tears must be repaired in an operating theater by an experienced obstetrician to prevent long-term complications like fecal incontinence or rectovaginal fistulas. 4. **Suture Material:** Polyglactin (Vicryl) is commonly used for muscle and mucosal repair.

Q: A classical cesarean section is indicated in all the following conditions EXCEPT:

Lower segment fibroid. **Explanation:** The choice of incision in a Cesarean Section (CS) depends on the accessibility of the lower uterine segment and the risk of future uterine rupture. **1. Why "Lower Segment Fibroid" is the Correct Answer:** A fibroid in the lower segment is actually an **indication for a Classical CS**, not an exception. If a large fibroid occupies the lower segment, it obstructs the standard transverse incision site and increases the risk of uncontrollable hemorrhage due to increased vascularity. In such cases, a vertical incision in the upper segment (Classical CS) is performed to bypass the fibroid and safely deliver the fetus. Therefore, the option is technically a "false" exception. **2. Analysis of Other Options:** * **Previous VVF (Vesicovaginal Fistula) and RVF (Rectovaginal Fistula) Repair:** These are classic indications for a **Planned Cesarean Section** (to avoid the trauma of vaginal delivery on the repair site). However, they do *not* mandate a Classical incision; a standard Lower Segment Cesarean Section (LSCS) is the preferred approach. * **Previous Myomectomy:** If the previous myomectomy involved a deep intramural incision or entry into the endometrial cavity, a CS is indicated. Again, this is usually performed via LSCS unless the previous scar is in the upper segment or inaccessible. **Clinical Pearls for NEET-PG:** * **Indications for Classical CS:** Carcinoma cervix, lower segment fibroid, anterior placenta previa (with large vessels), transverse lie with ruptured membranes, and extremely preterm fetuses where the lower segment is not formed. * **Disadvantage:** Higher risk of uterine rupture (4-9%) in subsequent pregnancies compared to LSCS (0.2-1.5%). * **High-Yield Fact:** The most common incision used today is the **Kerr incision** (transverse lower segment). The Classical incision is now reserved for specific obstetric emergencies or anatomical obstructions.

Q: Which of the following is NOT a criterion for forceps application?

Fetal station below 0. To successfully perform an instrumental vaginal delivery using forceps, specific prerequisites must be met to ensure maternal and fetal safety. ### **Explanation of the Correct Answer** **Option C (Fetal station below 0)** is the correct answer because it is **not** a sufficient criterion for forceps application. According to the ACOG classification, the fetal head must be at least at **station +2 cm or lower** (on a scale of -5 to +5) for a "Low Forceps" application, or on the pelvic floor for "Outlet Forceps." A station of "below 0" (e.g., +1) is considered a **Mid-forceps** procedure, which is rarely performed today due to high morbidity. Forceps are strictly contraindicated if the head is not engaged (station 0 or above). ### **Analysis of Incorrect Options** * **Option A (Fetal head at the perineum):** This is a requirement for **Outlet Forceps**. The scalp must be visible at the introitus without separating the labia. * **Option B (Cervix fully dilated):** This is an absolute prerequisite. Attempting forceps delivery through an incompletely dilated cervix can lead to cervical lacerations, hemorrhage, and uterine rupture. * **Option C (Sagittal suture in AP diameter):** For Outlet Forceps, the fetal globe must have reached the pelvic floor, and the sagittal suture must be in the AP diameter or in a right/left occiput anterior/posterior position (rotation < 45°). ### **NEET-PG High-Yield Pearls** * **Mnemonic for Prerequisites (FORCEPS):** **F**ully dilated cervix, **O**cciput position known, **R**uptured membranes, **C**ephalopelvic disproportion absent, **E**ngaged head, **P**elvis adequate, **S**pinal/Epidural anesthesia & **S**traight (empty) bladder. * **Prerequisite Station:** The head must be **engaged** (at least station 0). * **Most common indication:** Prolonged second stage of labor. * **Key Contraindication:** Fetal bleeding diathesis (e.g., hemophilia) or demineralizing bone disease.

Question 1

During suction and evacuation, there is a perforation of the uterus. What is the next step?

Accepted Answer

Laparotomy

Answer

Laparoscopy

Answer

Hysterotomy

Answer

Hysterectomy

Question 2

Ideally, traction during vacuum extraction should be applied in which of the following manner?

Accepted Answer

Intermittently and with contractions

Answer

Continuously

Answer

Intermittently with cycles of 20 seconds of traction followed by 1 minute of rest

Answer

Intermittently and between contractions

Question 3

What is the recommended time frame for performing a perimortem Cesarean section in a pregnant female experiencing cardiac arrest?

Accepted Answer

4 minutes

Answer

5 minutes

Answer

8 minutes

Answer

10 minutes

Question 4

In a deep transverse arrest, delivery of the baby is conducted by:

Accepted Answer

All of the above

Answer

Cesarean section

Answer

Vacuum extraction

Answer

Kielland forceps and manual rotation, and forceps delivery

Question 5

During delivery, an episiotomy is performed. The tear extends through the rectal sphincter, but the rectal mucosa remains intact. How would you classify this type of episiotomy?

Accepted Answer

Third-degree

Answer

First-degree

Answer

Second-degree

Answer

Fourth-degree

Question 6

In classical cesarean section, which part of the uterus has a higher chance of rupture?

Accepted Answer

Upper uterine segment

Answer

Lower uterine segment

Answer

Uterocervical junction

Answer

Posterior uterine segment

Question 7

Which of the following is NOT an advantage of Lower Segment Cesarean Section (LSCS)?

Accepted Answer

Lateral extension

Answer

Less blood loss

Answer

Minimal wound hematoma

Answer

Less chance of gutter formation

Question 8

In a patient with cardiac disease, prophylactic forceps are used when the fetal head is at which station during labor?

Accepted Answer

2

Answer

0

Answer

1

Answer

-1

Question 9

A classical cesarean section is indicated in all the following conditions EXCEPT:

Accepted Answer

Lower segment fibroid

Answer

Previous myomectomy delivery

Answer

Previous RVF repair

Answer

Previous VVF repair

Question 10

Which of the following is NOT a criterion for forceps application?

Accepted Answer

Fetal station below 0

Answer

Fetal head at the perineum

Answer

Cervix fully dilated

Answer

Sagittal suture in the anteroposterior diameter of the pelvis or less than 45 degrees of rotation

Operative Obstetrics — MCQs

Operative Obstetrics — MCQs

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