Operative Obstetrics Practice Questions

Q: Head engaged and reached the pelvic floor. What is the indicated obstetric intervention?

Outlet forceps. **Explanation:** The classification of forceps delivery is based on the station and position of the fetal head at the time of application. According to the **ACOG classification**, the correct answer is **Outlet Forceps**. **1. Why Outlet Forceps is correct:** Outlet forceps are indicated when the fetal scalp is visible at the introitus without separating the labia. Crucially, the **fetal skull has reached the pelvic floor** (the perineum), the sagittal suture is in the direct anteroposterior diameter (or right/left occipito-anterior/posterior position), and the rotation does not exceed 45 degrees. At this stage, the head is fully engaged and crowning. **2. Why the other options are incorrect:** * **High Forceps (B):** This refers to application when the head is not yet engaged. This procedure is **obsolete** and contraindicated in modern obstetrics due to extreme maternal and fetal trauma. * **Mid Forceps (C):** Applied when the head is engaged, but the station is above +2 cm. The leading point of the skull is above the pelvic floor. It carries a higher risk of morbidity. * **Low Forceps (D):** Applied when the leading point of the fetal skull is at a station of **+2 cm or more**, but has not yet reached the pelvic floor. **High-Yield Clinical Pearls for NEET-PG:** * **Prerequisites for Forceps:** Remember the mnemonic **FORCEPS** (Fetus alive, Pelvis Adequate, Ruptured membranes, Cervix fully dilated, Engaged head, Position known, Scissors/Bladder empty). * **Station 0:** Defined when the leading bony part of the head is at the level of the **Ischial Spines** (Engagement). * **Most common indication:** Prolonged second stage of labor. * **Vacuum vs. Forceps:** Vacuum (Ventouse) is associated with more cephalhematomas, while Forceps are associated with more maternal perineal trauma.

Q: Which of the following is NOT an assisted reproduction technique?

Artificial insemination into the uterus. **Explanation:** The core distinction in reproductive medicine lies between **Assisted Reproductive Technology (ART)** and simpler infertility treatments. According to the WHO and CDC definitions, **ART** includes all fertility treatments in which **both eggs and sperm are handled outside the body** (in vitro). **Why Option D is the Correct Answer:** **Artificial Insemination (IUI - Intrauterine Insemination)** involves depositing washed and concentrated sperm directly into the uterus. Since the **oocytes (eggs) are never handled outside the woman’s body** and fertilization occurs naturally within the fallopian tube (in vivo), it does not meet the technical definition of ART. It is classified as an "assisted conception" technique but not "assisted reproductive technology." **Analysis of Incorrect Options:** * **A. ZIFT:** This is an ART procedure where fertilization happens in the lab, and the resulting **zygote** is laparoscopically transferred into the fallopian tube. * **B. GIFT:** Although fertilization occurs inside the body, it is considered ART because the **oocytes are surgically removed** from the ovaries and handled alongside sperm before being placed into the fallopian tube. * **C. IVF-ET:** The gold standard of ART. Both gametes are handled, fertilization occurs in a dish, and the resulting **embryo** is transferred to the uterus. **NEET-PG Clinical Pearls:** * **Success Rates:** IVF generally has higher success rates per cycle (~30-40%) compared to IUI (~10-15%). * **Prerequisite for GIFT/ZIFT:** At least one fallopian tube **must be patent**. * **ICSI (Intracytoplasmic Sperm Injection):** The most advanced form of ART, used primarily for severe male factor infertility. * **OHSS (Ovarian Hyperstimulation Syndrome):** A critical complication to remember associated with the ovulation induction phase of ART.

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.

Q: A 32-year-old G5P1 presents for her first prenatal visit. Classically, cervical incompetence is characterized by delivery in the second trimester preceded by which of the following?

Painless dilatation. ### Explanation **Correct Answer: C. Painless dilatation** **Medical Concept:** Cervical incompetence (now often termed **Cervical Insufficiency**) is defined as the inability of the uterine cervix to retain a pregnancy in the second trimester in the absence of clinical contractions, labor, or both. The hallmark of this condition is the **painless, progressive dilatation and effacement** of the cervix. This occurs because the structural integrity of the cervical tissue is compromised, leading to the "silent" prolapse of fetal membranes into the vagina, followed by premature rupture of membranes (PROM) and expulsion of a premature fetus. **Analysis of Incorrect Options:** * **A. Fever:** Fever is suggestive of **Chorioamnionitis** or systemic infection. While infection can be a consequence of cervical incompetence (due to exposed membranes), it is not the preceding characteristic. * **B. Heavy bleeding:** This is more characteristic of **Abruptio Placentae** or **Placenta Previa**. Cervical incompetence may involve "show" or light spotting, but heavy hemorrhage is not typical. * **D. Painful contractions:** This is the defining feature of **Preterm Labor**. In cervical incompetence, the cervix fails *without* the presence of uterine contractions. **NEET-PG High-Yield Pearls:** * **Gold Standard Diagnosis:** Usually clinical, based on a history of repeated mid-trimester losses. * **Ultrasonography (TVS):** A cervical length **<25 mm** or the presence of **"funneling"** (beaking of the internal os) before 24 weeks is a significant marker. * **Treatment:** The primary intervention is **Cervical Cerclage** (e.g., McDonald or Shirodkar techniques), typically performed between **12–14 weeks** of gestation. * **Classic History:** A patient describing a "sudden pressure" followed by the rapid, relatively painless delivery of a normal-appearing fetus in the second trimester.

Question 1

Head engaged and reached the pelvic floor. What is the indicated obstetric intervention?

Accepted Answer

Outlet forceps

Answer

High forceps

Answer

Mid forceps

Answer

Low forceps

Question 2

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 3

Which of the following is NOT an assisted reproduction technique?

Accepted Answer

Artificial insemination into the uterus

Answer

ZIFT (Zygote Intrafallopian Transfer)

Answer

GIFT (Gamete Intrafallopian Transfer)

Answer

IVF and embryonal transfer (In Vitro Fertilization)

Question 4

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 5

All of the following are true with regards to fetal lung maturity except?

Accepted Answer

L:S ratio is the single best indicator of pulmonary maturity.

Answer

Phosphatidyl choline is the most important part of surfactant.

Answer

More than 50% cells are orange in colour on Nile blue sulphate test.

Answer

Phosphatidyl glycerol in amniotic fluid is 100% confirmatory of lung maturity.

Question 6

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

Question 7

Of the following events in labor and delivery, arrange them in their correct sequence of appearance:

Accepted Answer

Engagement, Descent, Flexion, Internal Rotation, Delivery by Extension, Restitution, External Rotation

Answer

Engagement, Flexion, Descent, Delivery by Extension, Internal Rotation, External Rotation, Restitution

Answer

Engagement, Flexion, Delivery by Extension, Descent, Delivery by Extension, Restitution, External Rotation

Answer

Descent, Engagement, Flexion, Delivery by Extension, Internal Rotation, Restitution, External Rotation

Question 8

A 32-year-old G5P1 presents for her first prenatal visit. Classically, cervical incompetence is characterized by delivery in the second trimester preceded by which of the following?

Accepted Answer

Painless dilatation

Answer

Fever

Answer

Heavy bleeding

Answer

Painful contractions

Question 9

Which of the following statements regarding fetal circulation is true?

Accepted Answer

The more oxygenated blood in the right atrium crosses the foramen ovale to the left atrium.

Answer

Fetal heart chambers work in series to effectively supply the brain and heart with higher oxygenated blood.

Answer

The ductus venosus is the main branch of the umbilical artery.

Answer

The oxygen content of blood delivered to the heart from the inferior vena cava is higher than that leaving the placenta.

Question 10

An elderly gravida (G6P5) became disoriented, lightheaded, breathless, and cyanotic 20 minutes after an uncomplicated spontaneous vaginal term delivery. Her blood pressure is 80/40 mm Hg, pulse is 110/min, and respiratory rate is 30/min. O2 saturation is 75% on face mask. A generalized purpuric rash and bleeding from the I.V line site are seen. Which of the following is the most appropriate next step in management of this patient?

Accepted Answer

Intubation and mechanical ventilation

Answer

Abdominal ultrasound

Answer

Intramuscular magnesium sulfate

Answer

Intravenous heparin

Operative Obstetrics — MCQs

Operative Obstetrics — MCQs

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