Operative Obstetrics — MCQs

A 26-year-old G3P2L2 at 40 weeks presents in the second stage of labor. The baby's head delivers spontaneously, but then retracts back against the perineum. Even with downward traction, the baby's anterior shoulder fails to deliver. All of the following are appropriate next steps in the management of this patient EXCEPT?

Q150Medium

A pregnant patient with a positive test for gonorrhea and no testing for chlamydial infection should be treated with which of the following regimens?

Operative Obstetrics Indian Medical PG Practice Questions and MCQs

Question 141: A 29-week pregnant patient presents with jaundice and severe pre-eclampsia (BP 170/110, urine albumin 3+). Investigations show Hb 7 gm%, platelet count 70,000, TLC 13,000, SGOT 230, bilirubin 2 mg/dL, and INR 2. What is the most likely diagnosis?

A. Acute Cholecystitis
B. HELLP syndrome (Correct Answer)
C. Hepatic rupture
D. Intrahepatic Cholestasis of Pregnancy (IHCP)

Explanation: **Explanation:** The clinical presentation of severe pre-eclampsia (BP 170/110, proteinuria) combined with biochemical evidence of multi-organ involvement points directly to **HELLP Syndrome** (Hemolysis, Elevated Liver enzymes, Low Platelets). **Why HELLP Syndrome is correct:** The diagnosis is based on the **Tennessee Classification** or **Mississippi Criteria**: * **Hemolysis:** Suggested by low Hb (7 gm%) and jaundice (bilirubin 2 mg/dL). * **Elevated Liver Enzymes:** SGOT (230 U/L) is significantly elevated (typically >70 U/L). * **Low Platelets:** Platelet count is 70,000/mm³ (Thrombocytopenia <100,000/mm³). The elevated INR (2) indicates impaired hepatic synthetic function or incipient DIC, which are known complications of severe HELLP. **Why other options are incorrect:** * **Acute Cholecystitis:** Presents with RUQ pain, fever, and Murphy’s sign; it does not explain severe hypertension, proteinuria, or profound thrombocytopenia. * **Hepatic Rupture:** A catastrophic complication of HELLP/Eclampsia presenting with sudden severe abdominal pain and hypovolemic shock. While possible, HELLP is the primary underlying diagnosis. * **IHCP:** Characterized by intense pruritus (palms/soles) and elevated bile acids. It does not cause hypertension, proteinuria, or hemolysis. **Clinical Pearls for NEET-PG:** * **Treatment of Choice:** Delivery is the definitive management (regardless of gestational age if >34 weeks or if maternal/fetal condition deteriorates). * **Dexamethasone:** Used to increase platelet counts in HELLP, though it doesn't improve maternal outcomes. * **Differential:** Always differentiate from **Acute Fatty Liver of Pregnancy (AFLP)**, where hypoglycemia and markedly prolonged PT/INR are more prominent than in HELLP.

Question 142: Which of the following statements is false regarding laminaria tents used as a contraceptive method?

A. It is derived from seaweed.
B. It is inserted into the posterior fornix. (Correct Answer)
C. It is utilized for cervical dilatation.
D. A thread is attached for ease of removal.

Explanation: **Explanation:** Laminaria tents are **hygroscopic dilators** used in operative obstetrics to achieve slow, controlled cervical ripening and dilatation. **1. Why Option B is the Correct (False) Statement:** Laminaria tents must be inserted **directly into the cervical canal** (intracervical) to be effective. They work by absorbing moisture from the cervical secretions, expanding to 3–4 times their original diameter over 6–24 hours. This exerts radial pressure on the cervix and stimulates the local release of endogenous prostaglandins. Placing them in the posterior fornix (like a PGE2 pessary) would render them ineffective as they require the confined space of the canal to exert mechanical force. **2. Analysis of Other Options:** * **Option A:** Laminaria is indeed a natural product derived from the dried stems of **seaweed** (*Laminaria digitata* or *Laminaria japonica*). * **Option C:** Its primary clinical utility is **cervical dilatation** prior to procedures like Dilation and Evacuation (D&E), induction of labor, or prior to intrauterine device (IUD) insertion in a nulliparous cervix. * **Option D:** Each tent has a **braided silk thread** attached to its distal end to facilitate easy retrieval from the cervix after the desired dilatation is achieved. **Clinical Pearls for NEET-PG:** * **Synthetic Alternatives:** Dilapan-S (polyacrylonitrile) and Lamicel (magnesium sulfate sponge) are synthetic hygroscopic dilators that act faster than natural Laminaria. * **Complications:** The most serious risk is the "hourglass" deformity if the tent expands above and below a tight internal os, making removal difficult. * **Contraindication:** Active pelvic infection or undiagnosed vaginal bleeding.

Question 143: In which of the following conditions is medical treatment of ectopic pregnancy contraindicated?

A. Sac size is 3 cm
B. 50 mL free fluid in pelvis
C. Presence of foetal heart activity (Correct Answer)
D. Previous ectopic pregnancy

Explanation: **Explanation:** Medical management of ectopic pregnancy, primarily using **Methotrexate (MTX)**, is reserved for hemodynamically stable patients who meet specific criteria. The goal is to inhibit rapidly dividing trophoblastic cells. **Why Option C is Correct:** The **presence of fetal heart activity** is a major contraindication to medical management. It indicates a more advanced and viable pregnancy with a higher metabolic demand and trophoblastic load, which significantly increases the risk of MTX failure and subsequent tubal rupture. In such cases, surgical intervention (Salpingostomy or Salpingectomy) is preferred. **Analysis of Incorrect Options:** * **A. Sac size is 3 cm:** Medical management is generally considered appropriate if the gestational sac diameter is **< 3.5 cm or 4 cm** (depending on the guideline used, e.g., ACOG or RCOG). A 3 cm sac falls within the acceptable range for MTX. * **B. 50 mL free fluid in pelvis:** While massive hemoperitoneum (suggesting rupture) is a contraindication, a small amount of free fluid (typically **< 100 mL**) isolated to the pouch of Douglas is common and does not preclude medical treatment. * **D. Previous ectopic pregnancy:** A history of ectopic pregnancy is not a contraindication. In fact, medical management is often preferred in these patients to avoid further surgical scarring of the remaining tube. **High-Yield Clinical Pearls for NEET-PG:** * **Absolute Contraindications to MTX:** Hemodynamic instability, signs of tubal rupture, fetal cardiac activity, breastfeeding, and renal/hepatic/hematological dysfunction. * **Ideal Candidate for MTX:** Hemodynamically stable, Serum β-hCG **< 3000–5000 mIU/mL**, and no fetal heart activity. * **Dose:** Single-dose regimen is most common (50 mg/m² IM). * **Monitoring:** β-hCG levels are measured on Day 4 and Day 7. A drop of **≥ 15%** between Day 4 and 7 indicates successful treatment.

Question 144: Which of the following is an absolute indication for caesarean section in pregnancy associated with heart disease?

A. Pulmonary stenosis
B. Coarctation of aorta (Correct Answer)
C. Eisenmenger syndrome
D. Ebstein's anomaly

Explanation: **Explanation:** In pregnancies complicated by heart disease, **vaginal delivery** is generally preferred because it involves less blood loss and fewer hemodynamic fluctuations than surgery. However, certain conditions pose a high risk of vascular catastrophe during the second stage of labor. **Why Coarctation of the Aorta is the Correct Answer:** Coarctation of the aorta is considered an absolute indication for Cesarean Section (CS) because the intense pushing (Valsalva maneuver) during the second stage of labor causes a massive surge in blood pressure. In the presence of a narrowed aorta, this hypertensive spike significantly increases the risk of **aortic dissection or rupture**. Elective CS is performed to bypass the hemodynamic stress of labor. **Analysis of Incorrect Options:** * **Pulmonary Stenosis (A):** Most patients tolerate pregnancy well. Vaginal delivery with an abbreviated second stage (forceps/ventouse) is the standard of care. * **Eisenmenger Syndrome (C):** While this carries a very high mortality rate (30-50%), vaginal delivery is actually preferred over CS. Surgery causes sudden shifts in systemic vascular resistance (SVR) and blood loss, which can worsen the right-to-left shunt and lead to sudden death. * **Ebstein’s Anomaly (D):** Unless there is severe cyanosis or heart failure, these patients usually tolerate vaginal delivery well. **High-Yield Clinical Pearls for NEET-PG:** * **Absolute Indications for CS in Heart Disease:** 1. Coarctation of the Aorta (due to risk of aortic rupture). 2. Marfan Syndrome with aortic root diameter >4 cm. 3. Acute Severe Heart Failure. 4. Warfarin intake within 2 weeks of labor (risk of fetal intracranial hemorrhage). * **Gold Standard:** For most cardiac cases, the "ideal" delivery is **Vaginal Delivery with Epidural Analgesia** (to reduce pain/stress) and **Instrumental Assistance** (to cut short the second stage).

Question 145: Which of the following is NOT a laparoscopic instrument?

A. Trocar
B. Pneumoperitoneum needle
C. Doyen's retractor (Correct Answer)
D. Fiberoptic camera

Explanation: **Explanation:** The correct answer is **C. Doyen’s retractor**. **1. Why Doyen’s retractor is the correct answer:** Doyen’s retractor is a **manual, handheld instrument** used primarily in open abdominal and pelvic surgeries (Laparotomy). In Obstetrics and Gynecology, it is most commonly used during a **Cesarean Section** to retract the bladder downwards after the vesicouterine fold of peritoneum is incised. Because it requires a large incision to be inserted and held by an assistant, it is incompatible with the "keyhole" nature of laparoscopy. **2. Analysis of incorrect options:** * **Trocar (Option A):** These are sharp or blunt-tipped cylinders used to pierce the abdominal wall. They act as the "ports" through which laparoscopic instruments and the camera are introduced. * **Pneumoperitoneum needle (Option B):** Also known as the **Veress needle**, this is a spring-loaded needle used to create a safe pneumoperitoneum (insufflating the abdomen with $CO_2$) before the primary trocar is inserted. * **Fiberoptic camera (Option D):** This is the "eye" of the laparoscope. It transmits high-definition images from inside the pelvic cavity to an external monitor via fiberoptic cables. **3. Clinical Pearls for NEET-PG:** * **Veress Needle Safety:** The most common site for Veress needle insertion is the **infraumbilical reel**, as the fascia is thinnest here. * **Pneumoperitoneum:** $CO_2$ is the gas of choice because it is non-combustible, highly soluble in blood (reducing air embolism risk), and easily excreted by the lungs. * **Doyen’s Retractor Fact:** It is specifically designed to protect the urinary bladder during the lower segment uterine incision in a C-section.

Question 146: What is the drug of choice for medical termination of pregnancy in a patient who is second gravida with asthma at 16 weeks gestation?

A. Prostaglandin
B. Ethacridine lactate
C. Hypertonic saline (Correct Answer)
D. Intra-amniotic dexamethasone

Explanation: **Explanation:** The core clinical challenge in this question is selecting a method for second-trimester medical termination of pregnancy (MTP) in a patient with **bronchial asthma**. **1. Why Hypertonic Saline is correct:** At 16 weeks gestation (second trimester), hypertonic saline (20%) is administered via intra-amniotic injection. It acts by causing chemical toxicity to the fetus and decidua, leading to the release of endogenous prostaglandins which initiate labor. Crucially, hypertonic saline does not cause bronchospasm, making it a safer alternative for patients where specific prostaglandins are contraindicated. **2. Analysis of Incorrect Options:** * **Prostaglandins (Option A):** While Prostaglandin E2 (Dinoprostone) and E1 (Misoprostol) are commonly used for MTP, **Prostaglandin F2-alpha (Carboprost)** is strictly contraindicated in asthmatic patients because it causes potent bronchoconstriction. Although E-series prostaglandins are bronchodilators, in exam scenarios, "Prostaglandins" as a broad category are often avoided or considered risky in asthmatics compared to mechanical/chemical alternatives. * **Ethacridine Lactate (Option B):** Previously a popular choice for second-trimester MTP (extra-amniotic), it is now largely obsolete due to the risk of infection (sepsis) and the availability of more effective pharmacological agents. * **Intra-amniotic Dexamethasone (Option D):** This is not a standard method for inducing abortion; corticosteroids are used for fetal lung maturity, not for termination. **Clinical Pearls for NEET-PG:** * **Gold Standard for 2nd Trimester MTP:** Currently, the combination of **Mifepristone followed by Misoprostol** is the preferred medical method. * **Asthma Contraindication:** Always remember: **PGF2α = Bronchoconstriction.** Avoid in asthma. * **Hypertonic Saline Risks:** Watch for "Water Intoxication" or hypernatremia if the saline is accidentally injected into a blood vessel. * **MTP Act (India):** Termination is legal up to 24 weeks for specific categories of women (as per 2021 amendment).

Question 147: All of the following are used in first-trimester MTP except?

A. Dilatation and evacuation
B. RU486
C. Suction and evacuation
D. Extra-amniotic ethacrydine (Correct Answer)

Explanation: **Explanation:** The first trimester of pregnancy is defined as the period up to 12 weeks of gestation. Medical Termination of Pregnancy (MTP) methods are categorized based on the gestational age. **Why Option D is the Correct Answer:** **Extra-amniotic ethacrydine lactate (Emcredil)** is a method used for **second-trimester** MTP (usually between 13–20 weeks). It acts by causing local irritation, leading to the release of endogenous prostaglandins which initiate uterine contractions. Because it requires a larger uterine cavity and a specific technique of catheter insertion into the extra-amniotic space, it is neither practical nor indicated for the small gestational sac of the first trimester. **Analysis of Incorrect Options:** * **RU486 (Mifepristone):** This is a competitive progesterone receptor antagonist. It is the gold standard for **medical MTP** in the first trimester (approved up to 9 weeks/63 days or 10 weeks/70 days depending on guidelines), usually followed by Misoprostol. * **Suction and Evacuation (S&E):** This is the most common **surgical method** for first-trimester MTP (up to 12 weeks). It involves vacuum aspiration of the products of conception. * **Dilatation and Evacuation (D&E):** While more commonly associated with the early second trimester (13–15 weeks), it is technically used for late first-trimester terminations (10–12 weeks) when the products are too large for simple suction alone. **High-Yield Clinical Pearls for NEET-PG:** * **MTP Act (India):** Recently amended to allow termination up to **24 weeks** for specific categories of women. * **Best Surgical Method (<12 weeks):** Suction Cautery/Vacuum Aspiration. * **Best Medical Method:** Mifepristone (200mg) + Misoprostol (800mcg). * **Ethacrydine Lactate:** Associated with a risk of infection; it is now largely replaced by medical induction using Prostaglandins (Misoprostol) in the second trimester.

Question 148: Labour is said to be prolonged when the duration of the latent stage of labor crosses which of the following thresholds?

A. 12 hours
B. 18 hours
C. 20 hours (Correct Answer)
D. 36 hours

Explanation: **Explanation:** The duration of the latent phase of labor is defined by the time taken for the cervix to efface and dilate up to 4–6 cm. According to **Friedman’s criteria**, a **Prolonged Latent Phase** is diagnosed when the duration exceeds: * **20 hours** in a Nulliparous woman. * **14 hours** in a Multiparous woman. The correct answer is **20 hours** (Option C) as it represents the upper limit for primigravida patients, which is the standard benchmark used in most clinical examinations. **Analysis of Options:** * **Option A (12 hours):** This is within the normal range for a nulliparous woman (average is 6–8 hours) and does not constitute a "prolonged" state. * **Option B (18 hours):** While close, it does not meet the formal diagnostic threshold of 20 hours defined by Friedman. * **Option D (36 hours):** This is excessively long and far exceeds the clinical definition; waiting this long before intervention increases maternal and fetal morbidity. **High-Yield Clinical Pearls for NEET-PG:** * **Management:** The preferred management for a prolonged latent phase is **therapeutic rest** (sedation with Morphine or Pethidine) or **Oxytocin augmentation**. It is *not* an indication for an immediate Cesarean section. * **Active Phase:** Begins at 6 cm dilation (ACOG/WHO guidelines). * **Protraction Disorder:** In the active phase, dilation <1.2 cm/hr (nullipara) or <1.5 cm/hr (multipara). * **Arrest of Labor:** No cervical change for ≥4 hours with adequate contractions or ≥6 hours with inadequate contractions.

Question 149: A 26-year-old G3P2L2 at 40 weeks presents in the second stage of labor. The baby's head delivers spontaneously, but then retracts back against the perineum. Even with downward traction, the baby's anterior shoulder fails to deliver. All of the following are appropriate next steps in the management of this patient EXCEPT?

A. Instruct the nurse to apply fundal pressure (Correct Answer)
B. Call for help
C. Cut a generous episiotomy
D. Instruct the nurse to flex the hip joint so that the patient's legs are up to her chest

Explanation: **Explanation:** The clinical scenario describes **Shoulder Dystocia**, characterized by the "Turtle Sign" (retraction of the head against the perineum) and the failure of the anterior shoulder to deliver with standard traction. This is an obstetric emergency. **Why Option A is the Correct Answer (The "EXCEPT" choice):** **Fundal pressure** is strictly **contraindicated** in shoulder dystocia. Applying pressure to the fundus further impacts the anterior shoulder behind the symphysis pubis and increases the risk of serious complications, including **uterine rupture** and **brachial plexus injury (Erb’s Palsy)** in the neonate. **Analysis of Other Options:** * **B. Call for help:** This is the immediate first step (ALARMER protocol) as shoulder dystocia requires an anesthesiologist, pediatrician, and extra nursing staff. * **C. Cut a generous episiotomy:** While shoulder dystocia is a bony impaction (not soft tissue), an episiotomy provides necessary room for the clinician to perform internal maneuvers (like Wood’s screw or Rubin’s maneuver). * **D. McRoberts Maneuver:** Flexing the hips against the chest increases the pelvic inlet diameter and flattens the sacral promontory. This is the **first-line maneuver** and succeeds in up to 40-90% of cases. **NEET-PG High-Yield Pearls:** * **HELPERR Mnemonic:** **H**elp, **E**pisiotomy, **L**egs (McRoberts), **P**ressure (Suprapubic), **E**nter (Internal maneuvers), **R**emove posterior arm, **R**oll (Gaskin maneuver). * **Suprapubic pressure (Mazzanti maneuver)** is correct; **Fundal pressure** is wrong. * **Zavanelli Maneuver:** Cephalic replacement followed by C-section (last resort). * **Most common injury:** Brachial plexus injury (C5-C6).

Question 150: A pregnant patient with a positive test for gonorrhea and no testing for chlamydial infection should be treated with which of the following regimens?

A. Ceftriaxone 250 mg IM once and azithromycin 1 g orally once (Correct Answer)
B. Cefixime 400 mg orally once
C. Erythromycin 500 mg orally four times daily for 7 days
D. Azithromycin 1 g orally once and amoxicillin 500 mg orally three times daily for 7 days

Explanation: **Explanation:** The management of Neisseria gonorrhoeae in pregnancy requires addressing both the primary infection and the high rate of co-infection with Chlamydia trachomatis (estimated at 30-50%). **1. Why Option A is Correct:** The standard of care for a patient with a positive gonorrhea test (where chlamydia has not been ruled out) is **dual therapy**. * **Ceftriaxone (250 mg IM):** A third-generation cephalosporin that is the drug of choice for gonorrhea due to increasing resistance to other classes. * **Azithromycin (1 g orally):** Added to cover potential *Chlamydia trachomatis* and to provide synergistic activity against *N. gonorrhoeae*, which helps delay the development of cephalosporin resistance. Both drugs are considered safe in pregnancy (Category B). **2. Why the other options are incorrect:** * **Option B:** Cefixime alone is no longer the first-line recommendation due to rising MICs (minimum inhibitory concentrations) and it fails to address the likely chlamydial co-infection. * **Option C:** Erythromycin is an alternative for chlamydia but is poorly tolerated due to GI side effects and does not treat gonorrhea. * **Option D:** This regimen lacks a cephalosporin, which is essential for treating gonorrhea. Amoxicillin is an alternative for chlamydia in pregnancy but is not first-line. **NEET-PG High-Yield Pearls:** * **Co-infection Rule:** Always treat for Chlamydia when treating Gonorrhea unless Chlamydia has been specifically ruled out by NAAT. * **Pregnancy Contraindication:** **Doxycycline** and **Fluoroquinolones** (e.g., Ciprofloxacin) are contraindicated in pregnancy due to fetal bone/dental staining and cartilage toxicity, respectively. * **Neonatal Complication:** Untreated maternal gonorrhea can lead to *Ophthalmia neonatorum* (purulent conjunctivitis), typically appearing 2–5 days after birth. Prophylaxis is done with 0.5% Erythromycin ophthalmic ointment.

Practice by Chapter

Cesarean Section Techniques

Practice Questions

Vaginal Birth After Cesarean

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Instrumental Deliveries

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Breech Delivery

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Episiotomy and Repair

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Management of Multiple Gestation

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Cervical Cerclage

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Obstetric Hysterectomy

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Surgery During Pregnancy

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Surgical Complications in Obstetrics

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