Operative Obstetrics Practice Questions

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

Fever. **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.

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

4 weeks. **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.

Q: 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?

10 weeks. **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).

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

Intravenous. **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).

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

Wertheim's hysterectomy. **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.

Q: When is vacuum extraction indicated?

All of the above. **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 1

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

Accepted Answer

Fever

Answer

Tachycardia

Answer

Hypotension

Answer

Hyperglycemia

Question 2

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

Accepted Answer

4 weeks

Answer

2 weeks

Answer

6 weeks

Answer

8 weeks

Question 3

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?

Accepted Answer

10 weeks

Answer

4 weeks

Answer

18 weeks

Answer

26 weeks

Question 4

Which statement correctly describes the instrumental delivery system?

Accepted Answer

Forceps are used when vacuum extraction fails.

Answer

Forceps are used only when cervical dilation is complete.

Answer

Vacuum extraction cannot be used for rotational deliveries in occipitoposterior and transverse presentations.

Answer

Forceps can be used in breech deliveries.

Question 5

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

Accepted Answer

Intravenous

Answer

Intramuscular

Answer

Extra-amniotic

Answer

Intra-amniotic

Question 6

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

Accepted Answer

Pregnancy-induced hypertension (PIH)

Answer

Anemia

Answer

Primigravida

Answer

Flexed breech

Question 7

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

Accepted Answer

Intracranial pressure rises during traction.

Answer

Retinal hemorrhage, intracranial hemorrhage, and subgaleal hemorrhage are more common in ventouse delivery than forceps.

Answer

Cephalohematoma is more common with vacuum extraction.

Answer

Less maternal trauma by vacuum as compared with forceps.

Question 8

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

Accepted Answer

Wertheim's hysterectomy

Answer

Total abdominal hysterectomy (TAH)

Answer

Anterior colporrhaphy

Answer

Vaginal hysterectomy

Question 9

When is vacuum extraction indicated?

Accepted Answer

All of the above

Answer

Cervix dilated more than 8 cm

Answer

Persistent occipito posterior position

Answer

Deep transverse arrest

Question 10

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?

Accepted Answer

Perform a cesarean section immediately.

Answer

Allow the patient to attempt a vaginal breech delivery when she goes into labor.

Answer

Pinard's maneuver can be utilized for the delivery of extended legs.

Answer

Schedule an external cephalic version in the next few days.

Operative Obstetrics — MCQs

Operative Obstetrics — MCQs

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