Operative Obstetrics — MCQs

A 30-year-old G2P1L1 at 37 weeks gestational age presents for a routine visit. Her first delivery was a vaginal delivery of a 4.3 kg baby boy after 30 minutes of pushing. This fetus is breech. A vaginal examination shows that the cervix is 50% effaced and 1 to 2 cm dilated. The presenting breech is high out of the pelvis. The estimated fetal weight is approximately 3.2 kgs. A sonogram confirms a fetus with a frank breech presentation, normal amniotic fluid, and the head is well flexed. Which of the following is NOT a possible management plan?

Operative Obstetrics Indian Medical PG Practice Questions and MCQs

Question 11: All of the following are known side effects with the use of tocolytic therapy except:

A. Tachycardia
B. Hypotension
C. Hyperglycemia
D. Fever (Correct Answer)

Explanation: **Explanation:** Tocolytics are drugs used to suppress uterine contractions to delay preterm labor. The correct answer is **Fever**, as it is not a side effect of any standard tocolytic agent. Fever in a patient with preterm labor is more likely an indicator of **chorioamnionitis**, which is actually a contraindication to tocolytic therapy. **Analysis of Options:** * **Tachycardia (Option A):** This is a classic side effect of **Beta-mimetics** (e.g., Ritodrine, Terbutaline) due to cross-reactivity with $\beta_1$ receptors in the heart. It can also occur with **Nifedipine** (Calcium Channel Blocker) as reflex tachycardia due to peripheral vasodilation. * **Hypotension (Option B):** This is primarily associated with **Nifedipine** and **Magnesium Sulfate** ($MgSO_4$). Nifedipine causes systemic vasodilation, while $MgSO_4$ can cause hypotension through smooth muscle relaxation and potential toxicity. * **Hyperglycemia (Option C):** This is a specific metabolic side effect of **Beta-mimetics**. Stimulation of $\beta_2$ receptors in the liver promotes glycogenolysis, leading to increased blood glucose levels. This makes Beta-mimetics contraindicated in diabetic pregnant women. **High-Yield Clinical Pearls for NEET-PG:** * **Drug of Choice (DOC):** **Nifedipine** is currently the first-line tocolytic due to its oral efficacy and better safety profile. * **Atosiban:** An Oxytocin receptor antagonist; it has the fewest side effects but is expensive. * **Indomethacin:** A PG-synthetase inhibitor; used before 32 weeks. After 32 weeks, it carries a high risk of **premature closure of the Ductus Arteriosus** and oligohydramnios. * **Pulmonary Edema:** A dangerous complication shared by Beta-mimetics and $MgSO_4$, especially when used with aggressive IV fluids.

Question 12: Lochia, in its various forms, may normally persist for what time interval postpartum?

A. 2 weeks
B. 4 weeks (Correct Answer)
C. 6 weeks
D. 8 weeks

Explanation: **Explanation:** Lochia is the vaginal discharge following childbirth, consisting of blood, mucus, and placental tissue. While the most intense discharge occurs in the first few days, the total duration of lochia typically persists for approximately **4 weeks (24 to 36 days)**. **Why Option B is Correct:** Physiologically, lochia progresses through three stages: 1. **Lochia Rubra (Red):** Days 1–4; consists mainly of blood and decidua. 2. **Lochia Serosa (Pink/Brown):** Days 5–10; contains serous exudate, erythrocytes, and leukocytes. 3. **Lochia Alba (White/Yellowish):** Day 11 up to 4 weeks; consists of leukocytes, epithelial cells, and mucus. By the end of the 4th week, the endometrial surface is largely restored, and the discharge ceases in most women. **Why Other Options are Incorrect:** * **Option A (2 weeks):** While the red color (rubra) fades by this time, the serosa and alba stages continue beyond 14 days. * **Option C & D (6–8 weeks):** Although the complete anatomical involution of the uterus takes 6 weeks, the active discharge of lochia usually concludes by the 4th week. Persistence beyond 6 weeks is considered abnormal and may indicate retained products of conception (RPOC) or endometritis. **NEET-PG High-Yield Pearls:** * **Total Volume:** The average total volume of lochia is approximately **200–500 ml**. * **Odor:** Normal lochia has a "fleshy" or "musty" odor. A **foul smell** is a classic sign of infection (puerperal sepsis). * **Clinical Correlation:** If lochia rubra persists beyond 2 weeks, suspect **subinvolution** of the uterus or retained placental fragments. * **Lochiometra:** A condition where lochia is retained within the uterine cavity, often due to cervical canal obstruction, leading to an enlarged, tender uterus.

Question 13: A pregnant woman is concerned about the potential adverse effects of X-rays on fetal development, given that the exposure occurred 7 weeks after her last menstrual period. What is the gestational age by which organogenesis is completed?

A. 4 weeks
B. 10 weeks (Correct Answer)
C. 18 weeks
D. 26 weeks

Explanation: **Explanation:** The correct answer is **10 weeks**. In embryology and obstetrics, the period of organogenesis (the formation of organs) typically occurs from the **3rd to the 8th week post-conception**. Since clinical gestational age is calculated from the Last Menstrual Period (LMP), which is usually 2 weeks before ovulation/conception, organogenesis corresponds to **5 to 10 weeks of gestation**. By the end of the 10th week, all major internal and external structures have been established, and the embryo is henceforth referred to as a **fetus**. **Analysis of Options:** * **A. 4 weeks:** At this stage, the embryo is in the pre-organogenesis phase (blastogenesis). Exposure to radiation here usually follows the "all-or-none" phenomenon—either resulting in death of the conceptus or complete recovery. * **C. 18 weeks:** By this time, the fetus is well into the second trimester. While histogenesis (tissue maturation) and functional development continue, the primary structural formation (organogenesis) is long complete. * **D. 26 weeks:** This marks the period of viability. Exposure at this stage does not cause structural malformations but may affect functional growth or the central nervous system. **High-Yield Clinical Pearls for NEET-PG:** * **Teratogenic Window:** The period of maximum sensitivity to teratogens (like X-rays or drugs) is **5 to 10 weeks** (organogenesis). * **Radiation Threshold:** Fetal risk is considered negligible at exposures **<5 rad (50 mGy)**. Most diagnostic X-rays are well below this limit. * **CNS Sensitivity:** The period of greatest sensitivity for radiation-induced microcephaly and intellectual disability is **8 to 15 weeks** (during neuronal migration).

Question 14: Which statement correctly describes the instrumental delivery system?

A. Forceps are used only when cervical dilation is complete.
B. Forceps are used when vacuum extraction fails. (Correct Answer)
C. Vacuum extraction cannot be used for rotational deliveries in occipitoposterior and transverse presentations.
D. Forceps can be used in breech deliveries.

Explanation: ### Explanation **1. Why Option B is Correct:** In modern operative obstetrics, the **"Sequential Use of Instruments"** is generally discouraged due to an increased risk of fetal intracranial hemorrhage and maternal trauma. However, if a vacuum extraction fails to achieve descent or delivery, **forceps** may be used by an experienced clinician as a final attempt before proceeding to an emergency Cesarean section. This is a recognized clinical pathway, provided the criteria for instrumental delivery are still met. **2. Analysis of Incorrect Options:** * **Option A:** While full cervical dilation is a prerequisite for *vaginal* forceps delivery, it is not an absolute rule for all forceps use. For example, **"Obstetric Forceps"** can be used during a Cesarean section to assist in delivering the head through the uterine incision, where cervical dilation is irrelevant. * **Option C:** This is incorrect because the **Malmström vacuum** or specialized cups (like the Bird cup) *can* be used for rotational deliveries. The vacuum allows for auto-rotation as the head descends along the pelvic axis. * **Option D:** This is a distractor. While **Piper’s forceps** are specifically designed for the **after-coming head of a breech**, the question asks about "instrumental delivery systems" in a general context. Option B is considered the more definitive "rule" regarding the relationship between the two systems. **Clinical Pearls for NEET-PG:** * **Prerequisites for Forceps/Vacuum:** Remember the mnemonic **FORCEPS**: **F**etus alive, **O**ptimal position, **R**uptured membranes, **C**ervix fully dilated, **E**ngaged head, **P**elvis adequate, **S**ubpudendal block/Bladder empty. * **Vacuum Contraindications:** Preterm fetus (<34 weeks), face presentation, and fetal coagulopathies. * **Highest Success:** Forceps have a higher success rate for delivery than vacuum but carry a higher risk of 3rd and 4th-degree perineal tears.

Question 15: Prostaglandins can be used for medical termination of pregnancy by all routes except?

A. Intravenous (Correct Answer)
B. Intramuscular
C. Extra-amniotic
D. Intra-amniotic

Explanation: **Explanation:** The correct answer is **Intravenous (A)**. **Medical Rationale:** Prostaglandins (PGs) are potent stimulators of uterine smooth muscle. While they are highly effective for medical termination of pregnancy (MTP), the **intravenous route** is avoided because it leads to a rapid, systemic surge of the drug. This causes severe, intolerable side effects due to the contraction of smooth muscles in other organ systems, leading to intense nausea, vomiting, explosive diarrhea, bronchospasm, and significant hypertension or pyrexia. Consequently, the IV route has no clinical place in modern obstetric practice for MTP. **Analysis of Other Options:** * **Intramuscular (B):** 15-methyl PGF2α (Carboprost) is frequently administered intramuscularly. It is highly effective for mid-trimester abortions and the management of postpartum hemorrhage (PPH). * **Extra-amniotic (C):** PGF2α or PGE2 can be instilled into the space between the uterine wall and the fetal membranes via a catheter. This allows for a high local concentration with slower systemic absorption, reducing side effects. * **Intra-amniotic (D):** Injection of PGs (usually PGF2α) into the amniotic sac is a classic method for second-trimester induction. It ensures a sustained local effect on the myometrium. **High-Yield Clinical Pearls for NEET-PG:** * **Drug of Choice:** For first-trimester medical abortion, the combination of **Mifepristone (Oral)** and **Misoprostol (Vaginal/Sublingual/Buccal)** is the gold standard. * **Misoprostol (PGE1):** Unique because it is stable at room temperature and can be administered via oral, vaginal, sublingual, or rectal routes. * **Side Effect Profile:** The most common side effect of prostaglandins is GI upset (diarrhea), while the most specific contraindication for PGF2α (Carboprost) is **Asthma** (due to bronchoconstriction).

Question 16: In which of the following conditions is external cephalic version (ECV) contraindicated?

A. Pregnancy-induced hypertension (PIH) (Correct Answer)
B. Anemia
C. Primigravida
D. Flexed breech

Explanation: **Explanation:** External Cephalic Version (ECV) is a procedure used to manually rotate a fetus from a breech or transverse lie to a cephalic presentation to facilitate vaginal delivery. **Why PIH is the Correct Answer:** Pregnancy-induced hypertension (PIH) is a **relative/absolute contraindication** for ECV due to the increased risk of **placental abruption**. In PIH, the placental vasculature is often compromised; the mechanical pressure and manipulation involved in ECV can trigger premature separation of the placenta. Additionally, PIH is frequently associated with **uteroplacental insufficiency** and **oligohydramnios**, both of which increase the risk of fetal distress during the procedure and reduce the likelihood of success. **Analysis of Incorrect Options:** * **Anemia:** While severe anemia requires stabilization, it is not a contraindication for ECV. * **Primigravida:** Being a primigravida is not a contraindication. While the success rate is lower compared to multiparous women (due to a tighter abdominal wall), ECV is routinely offered to primigravidae at 36–37 weeks. * **Flexed Breech:** A flexed (complete) breech is actually an **indication** for ECV. It is generally easier to turn than a frank breech, where the extended legs may act as a splint. **High-Yield Clinical Pearls for NEET-PG:** * **Timing:** ECV is performed at **≥37 weeks** in multipara and **≥36 weeks** in primigravida (to allow for spontaneous version before this and to ensure fetal maturity if emergency delivery is needed). * **Absolute Contraindications:** Placenta previa, previous classical cesarean section, ruptured membranes, multiple pregnancy, and any condition requiring C-section anyway. * **Prerequisite:** Always perform a **Reactive NST** before and after the procedure and keep **Tocolytics** (e.g., Ritodrine or Salbutamol) ready to relax the uterus. * **Rh-Negative Mothers:** Must receive **Anti-D immunoglobulin** after the procedure to prevent isoimmunization from potential feto-maternal hemorrhage.

Question 17: All of the following statements are true regarding comparison between vacuum delivery and forceps delivery, EXCEPT:

A. Retinal hemorrhage, intracranial hemorrhage, and subgaleal hemorrhage are more common in ventouse delivery than forceps.
B. Intracranial pressure rises during traction. (Correct Answer)
C. Cephalohematoma is more common with vacuum extraction.
D. Less maternal trauma by vacuum as compared with forceps.

Explanation: In operative obstetrics, understanding the mechanical differences between vacuum (ventouse) and forceps is high-yield for NEET-PG. **Explanation of the Correct Answer (B):** The statement "Intracranial pressure (ICP) rises during traction" is **incorrect**, making it the right choice. During vacuum extraction, the negative pressure is applied to the scalp, which actually causes a **decrease** in intracranial pressure or keeps it stable during traction. In contrast, forceps delivery involves direct compression of the fetal skull, which leads to a transient **increase** in intracranial pressure during traction. **Analysis of Other Options:** * **Option A:** True. Vacuum extraction is associated with higher rates of neonatal "surface" and "shear" injuries. Subgaleal hemorrhage is a potentially life-threatening complication unique to vacuum due to the shearing of emissary veins. Retinal and intracranial hemorrhages are also statistically more frequent compared to forceps. * **Option C:** True. The suction mechanism of the ventouse creates a chignon (artificial caput) and often leads to a cephalohematoma (subperiosteal bleed) due to the separation of the pericranium from the bone. * **Option D:** True. One of the primary advantages of vacuum is that it occupies no extra space in the birth canal, significantly reducing the risk of high-grade perineal tears and vaginal trauma compared to the metal blades of forceps. **Clinical Pearls for NEET-PG:** * **Prerequisites:** For both, the cervix must be fully dilated, membranes ruptured, and the head engaged. * **Failure Rate:** Vacuum has a higher failure rate than forceps. * **Contraindication:** Vacuum is contraindicated in **preterm fetuses (<34 weeks)** due to the risk of intraventricular hemorrhage and in **face/breech presentations**. * **The "Rule of 3":** Vacuum application should be abandoned if there are 3 pulls with no descent, 3 pop-offs, or 20–30 minutes of total application time.

Question 18: Maximum chances of ureteric injury are with which of the following procedures?

A. Total abdominal hysterectomy (TAH)
B. Wertheim's hysterectomy (Correct Answer)
C. Anterior colporrhaphy
D. Vaginal hysterectomy

Explanation: **Explanation:** The ureter is one of the most vulnerable structures during pelvic surgeries due to its close anatomical proximity to the uterus and cervix. **Why Wertheim’s Hysterectomy is the Correct Answer:** Wertheim’s hysterectomy (Radical Hysterectomy) is performed for cervical cancer. It involves extensive dissection of the **"Ureteric Tunnel"** (unroofing the ureter) and the mobilization of the ureter from its bed to allow for the wide excision of the parametrium and pelvic lymph nodes. This extensive dissection increases the risk of both direct surgical trauma (crushing or transection) and devascularization (ischemic injury), making it the procedure with the highest incidence of ureteric injury. **Analysis of Incorrect Options:** * **Total Abdominal Hysterectomy (TAH):** While TAH is the most common cause of ureteric injury in absolute numbers (due to the high volume of procedures performed), the *percentage risk* per procedure is significantly lower than in radical surgery. * **Vaginal Hysterectomy:** The risk is lower as the ureters are generally displaced laterally and superiorly when the bladder is pushed up. * **Anterior Colporrhaphy:** This procedure involves the vaginal wall and bladder base; while bladder injury is a risk, ureteric injury is rare unless the sutures are placed too laterally near the trigone. **High-Yield Clinical Pearls for NEET-PG:** * **Most common site of injury:** At the level of the **Ischial Spine**, where the ureter passes under the uterine artery ("Water under the bridge"). * **Second most common site:** At the **Infundibulopelvic ligament** during ligation of the ovarian vessels. * **Gold standard for diagnosis:** Intraoperative recognition is best; postoperatively, **IVP (Intravenous Pyelogram)** or CT Urography is used. * **Prevention:** Intraoperative identification and "skeletonization" of the ureter are key in radical cases.

Question 19: When is vacuum extraction indicated?

A. Cervix dilated more than 8 cm
B. Persistent occipito posterior position
C. Deep transverse arrest
D. All of the above (Correct Answer)

Explanation: **Explanation:** Vacuum extraction (Ventouse) is an instrumental vaginal delivery method used to assist the mother during the second stage of labor. The fundamental requirement for vacuum application is that the **cervix must be fully dilated (10 cm)**; however, in specific clinical scenarios where the cervix is nearly complete (8 cm or more) and there is an urgent maternal or fetal indication, it may be considered (though 10 cm remains the standard textbook prerequisite). * **Option A (Cervix dilated >8 cm):** While 10 cm is ideal, vacuum can technically be applied when the cervix is sufficiently retracted to allow the cup to be placed on the flexion point without trapping cervical tissue. * **Option B (Persistent Occipito-Posterior Position):** Vacuum is highly effective here. The "Malmström" vacuum allows for **autoreotation**; as the head descends, it naturally rotates to an occipito-anterior position due to the pelvic floor dynamics. * **Option C (Deep Transverse Arrest):** This occurs when the head is arrested at the level of the ischial spines in a transverse position. Vacuum extraction facilitates both descent and rotation, making it a preferred choice over difficult high-forceps rotations. **High-Yield Clinical Pearls for NEET-PG:** * **Prerequisites:** Mnemonic **FORCEPS** (Fetus alive, Os fully dilated, Ruptured membranes, Cephalic presentation, Engaged head, Pelvis adequate, Stirrups/Empty bladder). * **Contraindications:** Preterm fetus (<34 weeks due to risk of intraventricular hemorrhage), face/breech presentation, and fetal bleeding diathesis. * **Complication:** The most specific complication is **Subgaleal hemorrhage** (serious) and **Caput succedaneum/Chignon** (common/transient). * **Pressure:** Should not exceed **0.8 kg/cm²**. The "Rule of 3s" applies: stop if there are 3 pulls, 3 pop-offs, or 30 minutes of application.

Question 20: A 30-year-old G2P1L1 at 37 weeks gestational age presents for a routine visit. Her first delivery was a vaginal delivery of a 4.3 kg baby boy after 30 minutes of pushing. This fetus is breech. A vaginal examination shows that the cervix is 50% effaced and 1 to 2 cm dilated. The presenting breech is high out of the pelvis. The estimated fetal weight is approximately 3.2 kgs. A sonogram confirms a fetus with a frank breech presentation, normal amniotic fluid, and the head is well flexed. Which of the following is NOT a possible management plan?

A. Allow the patient to attempt a vaginal breech delivery when she goes into labor.
B. Perform a cesarean section immediately. (Correct Answer)
C. Pinard's maneuver can be utilized for the delivery of extended legs.
D. Schedule an external cephalic version in the next few days.

Explanation: The correct answer is **B. Perform a cesarean section immediately.** ### **Explanation** The patient is currently at 37 weeks gestation, hemodynamically stable, and not in active labor (cervix 1-2 cm dilated, presenting part high). While a breech presentation at term often necessitates a planned Cesarean Section (CS), there is **no medical indication for an immediate (emergency) CS** in this scenario. Immediate intervention is reserved for fetal distress, cord prolapse, or active labor where vaginal delivery is contraindicated. ### **Analysis of Other Options** * **A. Vaginal breech delivery:** This is a possible management plan. According to ACOG and RCOG guidelines, vaginal breech delivery can be considered if specific criteria are met: frank/complete breech, flexed head, estimated fetal weight (EFW) between 2.5–4 kg, and an adequate pelvis (proven here by her previous 4.3 kg vaginal delivery). * **C. Pinard’s maneuver:** This is a standard obstetric maneuver used during a vaginal breech delivery to deliver the legs in a **frank (extended) breech**. It involves applying pressure to the popliteal fossa to flex the knee and bring the foot down. * **D. External Cephalic Version (ECV):** ECV is ideally performed at or after 37 weeks to convert a breech to a cephalic presentation. Given the normal amniotic fluid and flexed head, this patient is an excellent candidate for ECV. ### **NEET-PG High-Yield Pearls** * **Prerequisites for Vaginal Breech:** EFW 2.5–3.5 kg (some allow up to 4kg), flexed head (ruled out by ultrasound to prevent "star-gazing fetus" and head entrapment), and frank/complete breech presentation. * **Footling breech** is a contraindication for vaginal delivery due to the high risk of **cord prolapse**. * **Burn-Marshall Maneuver:** Used for delivery of the after-coming head (letting the baby hang by its own weight). * **Mauriceau-Smellie-Veit Maneuver:** The most common method for manual delivery of the after-coming head. * **Piper Forceps:** The specialized forceps used for the after-coming head of a breech.

Practice by Chapter

Cesarean Section Techniques

Practice Questions

Vaginal Birth After Cesarean

Practice Questions

Instrumental Deliveries

Practice Questions

Breech Delivery

Practice Questions

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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