Labor and Delivery Practice Questions

Q: What is the earliest indication of concealed acute bleeding in pregnancy?

Tachycardia. **Explanation:** In the setting of acute concealed bleeding (such as abruptio placentae or ruptured ectopic pregnancy), the body initiates compensatory mechanisms to maintain perfusion to vital organs. **1. Why Tachycardia is correct:** Tachycardia is the **earliest clinical sign** of hypovolemia. When blood volume decreases, venous return to the heart drops, leading to a decrease in stroke volume. To maintain cardiac output ($CO = HR \times SV$), the sympathetic nervous system is activated, increasing the heart rate. In pregnant women, this sign is critical because they can lose up to 30-35% of their blood volume before a significant drop in blood pressure occurs, making tachycardia a more sensitive early indicator than hypotension. **2. Why other options are incorrect:** * **Postural Hypotension:** While an early sign of volume depletion, it requires changing the patient's position to elicit. In acute obstetric emergencies, tachycardia is often observed first during primary assessment. * **Oliguria:** This is a later sign indicating significant renal hypoperfusion and established shock (usually Stage III hemorrhage). * **Low body temperature:** Hypothermia is a late finding associated with the "lethal triad" of trauma/hemorrhage (acidosis, coagulopathy, and hypothermia) and indicates severe, decompensated shock. **Clinical Pearls for NEET-PG:** * **The "Rule of 30":** In obstetric hemorrhage, a systolic BP drop of 30 mmHg, a heart rate increase of 30 bpm, or a 30% loss of blood volume indicates significant distress. * **Shock Index (SI):** Defined as $HR / SBP$. A value $> 0.9$ in pregnancy is a highly sensitive marker for significant concealed hemorrhage and the need for transfusion. * **Note:** Always remember that due to the physiological hypervolemia of pregnancy, "normal" vital signs can be deceptive. Tachycardia should always be investigated.

Q: A 22-year-old primigravid woman at term presents to the labor room with contractions every 2 minutes. Her prenatal course was unremarkable, and she takes no medications and has no known drug allergies. Examination reveals her cervix to be 6 cm dilated and 100% effaced, with the fetus at 0 station. The fetal heart rate has a baseline in the 150s and is reactive. The patient desires an epidural for pain relief. Which of the following should be given orally shortly before the epidural is placed?

Antacid. **Explanation:** The correct answer is **A. Antacid**. **Why Antacids are given:** Pregnant women are at a significantly increased risk of **aspiration pneumonitis (Mendelson Syndrome)** during labor. This is due to several physiological changes: increased intra-abdominal pressure from the gravid uterus, progesterone-mediated relaxation of the lower esophageal sphincter, and delayed gastric emptying. Before administering neuraxial anesthesia (like an epidural), it is standard practice to administer a non-particulate antacid (e.g., **Sodium Citrate**). The goal is to increase the pH of the gastric contents. If an emergency arises requiring general anesthesia or if the patient vomits and aspirates, a higher gastric pH ( >2.5) significantly reduces the risk of severe chemical pneumonitis. **Why other options are incorrect:** * **B. Antibiotic:** Routine prophylactic antibiotics are not indicated for the placement of an epidural. They are reserved for specific indications like Group B Strep (GBS) prophylaxis or prior to a Cesarean section. * **C. Aspirin:** Aspirin is an antiplatelet agent and is contraindicated immediately before neuraxial anesthesia due to the risk of an epidural hematoma. * **D. Clear liquid meal:** While clear liquids are often allowed in early labor, they do not provide the protective pH-neutralizing effect required before an anesthetic procedure. **NEET-PG High-Yield Pearls:** * **Mendelson Syndrome:** Defined as aspiration of gastric contents with a pH 25 ml (0.4 ml/kg). * **Non-particulate antacids** (Sodium Citrate) are preferred over particulate ones (Magnesium hydroxide) because they are less harmful if aspirated. * **Prokinetic agents** (Metoclopramide) may also be used to facilitate gastric emptying in laboring patients.

Q: Presentation, when the engaging diameter is mentovertical, is?

Brow. In fetal malpresentations, the presenting part is determined by the degree of flexion or extension of the fetal head. **Explanation of the Correct Answer:** * **Brow Presentation (Option A):** This occurs when the fetal head is **partially extended**. The engaging diameter is the **mentovertical (MV)** diameter, which measures approximately **13.5 cm**. This is the largest diameter of the fetal skull, making vaginal delivery impossible if the presentation persists, as it exceeds the average dimensions of the maternal pelvic inlet. **Analysis of Incorrect Options:** * **Vertex Presentation (Option C):** The head is **completely flexed**. The engaging diameter is the **suboccipitobregmatic (SOB)**, measuring **9.5 cm**. This is the ideal diameter for a normal vaginal delivery. * **Face Presentation (Option B):** The head is **completely extended**. The engaging diameter is the **submentobregmatic (SMB)**, measuring **9.5 cm**. While the diameter is small, delivery depends on the position (mentum anterior is deliverable, mentum posterior is not). * **Breech Presentation (Option D):** This is a longitudinal lie where the buttocks or lower extremities are the presenting parts, not the fetal head. The engaging diameter is the **bitrochanteric (10 cm)**. **High-Yield Clinical Pearls for NEET-PG:** 1. **Deflexed Vertex:** Engaging diameter is **suboccipitofrontal (10 cm)**. 2. **Mnemonic for Diameters:** * Complete Flexion → Vertex → SOB (9.5 cm) * Incomplete Extension → Brow → MV (13.5 cm) - *Largest* * Complete Extension → Face → SMB (9.5 cm) 3. **Clinical Sign:** On vaginal examination in brow presentation, the **anterior fontanelle and supraorbital ridges** are palpable, but the chin (mentum) is not.

Q: During application of the cup in Ventouse, the 'knob' of the cup points towards which anatomical landmark?

Occiput. **Explanation:** The **Ventouse (Vacuum Extractor)** is an instrument used for assisted vaginal delivery. The "knob" or "pointer" on the vacuum cup is a critical safety feature designed to assist the clinician in orientation and correct placement. **Why Occiput is correct:** The goal of vacuum application is to place the center of the cup over the **flexion point**. This point is located on the sagittal suture, approximately **3 cm anterior to the posterior fontanelle** and 6 cm posterior to the anterior fontanelle. When the cup is correctly positioned, the **knob points toward the leading point of the fetal head, which is the Occiput**. This ensures that traction promotes flexion of the head, minimizing the presenting diameter (suboccipitobregmatic) and facilitating easier passage through the birth canal. **Why other options are incorrect:** * **Brow and Chin:** If the knob points toward the brow or chin, the cup is likely placed too far anteriorly. This causes **deflexion** of the fetal head, increasing the presenting diameter and the risk of failure or trauma. * **Neck:** The neck is not a landmark for cup orientation; the cup must remain on the bony cranium to be effective and safe. **High-Yield Clinical Pearls for NEET-PG:** * **Flexion Point:** 3 cm anterior to the posterior fontanelle. * **Pressure:** Should not exceed **0.8 kg/cm²** (600 mmHg). * **Rule of 3s:** Abandon the procedure if there are 3 "pop-offs," 3 pulls with no progress, or if the procedure exceeds 30 minutes. * **Contraindication:** Vacuum is contraindicated in **preterm births (<34 weeks)** due to the risk of intraventricular hemorrhage.

Q: Which of the following are causes of breech presentation?

All of the above. **Explanation:** The correct answer is **D. All of the above**. The underlying medical concept for breech presentation is the **"Law of Accommodation."** In a normal pregnancy, the fetus maneuvers so that its smaller, more mobile pole (the head) occupies the narrower lower uterine segment, while the bulkier podalic pole (buttocks and flexed legs) occupies the roomier fundus. Any factor that interferes with this adaptation or prevents the head from engaging in the pelvis can result in a breech presentation. * **Hydrocephalus (Option A):** In this condition, the fetal head becomes larger than the breech. Following the Law of Accommodation, the larger head seeks the roomier fundus, while the smaller breech occupies the lower uterine segment. * **Placenta Previa (Option B):** The presence of the placenta in the lower uterine segment reduces the available space for the fetal head to engage, forcing the head into the fundus. * **Pelvic Contracture (Option C):** A narrow or deformed maternal pelvis prevents the fetal head from entering the pelvic brim (engagement), leading to malpresentation. **High-Yield Clinical Pearls for NEET-PG:** * **Most Common Cause:** Prematurity is the most common cause of breech presentation. * **Uterine Anomalies:** Septate or bicornuate uteri are significant maternal causes. * **Multiparity:** Due to laxity of the abdominal and uterine muscles, the fetus can easily change positions. * **Management:** External Cephalic Version (ECV) is typically offered at 36 weeks in primigravida and 37 weeks in multigravida to correct breech presentation.

Q: All of the following is true about abruptio placentae except?

Bright red blood. **Explanation:** Abruptio placentae refers to the premature separation of a normally situated placenta from the uterine wall before the birth of the fetus. **Why Option B is the correct answer (False statement):** In abruptio placentae, the bleeding is typically **dark-colored (non-clotting)** because it is often retroplacental and undergoes changes before escaping through the cervix. In contrast, **bright red, painless bleeding** is the hallmark of **Placenta Previa**. Abruptio is usually associated with severe abdominal pain and uterine tenderness. **Analysis of other options:** * **Option A:** This is the standard definition of abruption. Unlike placenta previa (where the placenta is low-lying), abruption involves a placenta in the normal upper segment. * **Option C:** Recurrence is a significant risk factor. After one episode of abruption, the risk of recurrence in a subsequent pregnancy is approximately **5–15%**, and it rises to 25% after two episodes. * **Option D:** Abruption is statistically more common in **multigravida** women. Other major risk factors include pregnancy-induced hypertension (most common cause), trauma, smoking, and cocaine use. **NEET-PG High-Yield Pearls:** * **Couvelaire Uterus:** A complication of severe abruption where blood extravasates into the myometrium, giving it a port-wine/purplish appearance. * **Most common cause of DIC in pregnancy:** Abruptio placentae (due to release of thromboplastin). * **Clinical Triad:** Abdominal pain, vaginal bleeding (may be concealed), and uterine hypertonicity/tenderness. * **Management:** If the fetus is alive and at term, or if there is maternal instability, immediate delivery (usually via LSCS) is indicated.

Question 1

What is the earliest indication of concealed acute bleeding in pregnancy?

Accepted Answer

Tachycardia

Answer

Oliguria

Answer

Postural hypotension

Answer

Low body temperature

Question 2

A 22-year-old primigravid woman at term presents to the labor room with contractions every 2 minutes. Her prenatal course was unremarkable, and she takes no medications and has no known drug allergies. Examination reveals her cervix to be 6 cm dilated and 100% effaced, with the fetus at 0 station. The fetal heart rate has a baseline in the 150s and is reactive. The patient desires an epidural for pain relief. Which of the following should be given orally shortly before the epidural is placed?

Accepted Answer

Antacid

Answer

Antibiotic

Answer

Aspirin

Answer

Clear liquid meal

Question 3

Presentation, when the engaging diameter is mentovertical, is?

Accepted Answer

Brow

Answer

Face

Answer

Vertex

Answer

Breech

Question 4

Which of the following is an indication for Cesarean section after a previous Cesarean section?

Accepted Answer

Cephalopelvic disproportion (CPD)

Answer

Hypertension

Answer

Type 1 placenta previa

Answer

Multigravida

Question 5

During application of the cup in Ventouse, the 'knob' of the cup points towards which anatomical landmark?

Accepted Answer

Occiput

Answer

Brow

Answer

Chin

Answer

Neck

Question 6

Which of the following are causes of breech presentation?

Accepted Answer

All of the above

Answer

Hydrocephalus

Answer

Placenta previa

Answer

Pelvic contracture

Question 7

A 37-week pregnant woman presents with bleeding per vaginam. Investigations reveal a severe degree of placenta previa. What is the appropriate management?

Accepted Answer

Immediate Cesarean section

Answer

Blood transfusion

Answer

Conservative management

Answer

Medical induction of labor

Question 8

A 35-year-old G2P1L1 presents at 35 weeks of gestation with leakage per vagina. Examination of the pooled fluid shows it turns red litmus paper blue and exhibits ferning. The patient's temperature is 102
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Accepted Answer

Administer antibiotics

Answer

Administer betamethasone

Answer

Administer tocolytics

Answer

Place a cervical cerclage

Question 9

All of the following is true about abruptio placentae except?

Accepted Answer

Bright red blood

Answer

Premature separation of normally attached placenta

Answer

Risk of recurrence is about 15% with previous abruption

Answer

More common in multigravida

Question 10

A hypertensive primigravida with completely subsided pre-eclamptic features, up to what gestational age should the pregnancy be continued?

Accepted Answer

37 weeks

Answer

35 weeks

Answer

39 weeks

Answer

40 weeks

Labor and Delivery — MCQs

Labor and Delivery — MCQs

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