Operative Obstetrics Practice Questions

Q: Hayman hemostatic suture is applied on which of the following?

Uterus in PPH. **Explanation:** The **Hayman suture** is a uterine compression suture used in the management of **Postpartum Hemorrhage (PPH)** due to uterine atony. It is a modification of the classic B-Lynch suture. **Why Option B is correct:** The primary goal of the Hayman suture is to mechanically compress the uterus to control bleeding when medical management (oxytocics) fails. Unlike the B-Lynch suture, the Hayman technique does not require the lower uterine segment to be opened (no hysterotomy). Two to four vertical mattress sutures are passed directly through the anterior and posterior uterine walls and tied at the fundus. This "sandwich" effect compresses the myometrial sinusoids, effectively stopping the hemorrhage. **Why other options are incorrect:** * **Option A:** Vaginal biopsy sites are usually managed with simple interrupted sutures or packing; compression sutures are unnecessary for such small surface areas. * **Option C:** Fallopian tube reanastomosis requires delicate, non-absorbable microsutures (like 6-0 or 7-0 Prolene) to maintain patency, not compression. * **Option D:** Ovarian cystectomy involves hemostasis of the ovarian bed using fine absorbable sutures (like Vicryl) or cautery; compression sutures would compromise ovarian blood supply. **High-Yield Clinical Pearls for NEET-PG:** * **B-Lynch Suture:** The original "brace" suture; requires opening the uterus (hysterotomy). * **Cho Suture:** Multiple square/box sutures applied to the uterus to appose the walls. * **Pereira Suture:** Multiple longitudinal and transverse (cerclage-like) sutures. * **Stepwise Devascularization:** If compression sutures fail, the next surgical steps include ligation of the Uterine artery, then Ovarian artery, and finally Internal Iliac artery (Hypogastric artery).

Q: In a patient with a head injury, which of the following bones is perforated during a craniotomy?

Occiput. **Explanation:** In modern obstetrics, destructive operations are rare but remain a life-saving necessity in specific scenarios, such as a dead fetus in an obstructed labor where a cesarean section poses a high maternal risk. **Craniotomy** is performed to reduce the size of the fetal head by evacuating the brain contents, facilitating vaginal delivery. **Why Occiput is the Correct Answer:** The primary objective of a craniotomy is to decompress the skull. In a **cephalic presentation**, the perforation is ideally made through the **occipital bone** (specifically near the posterior fontanelle). This site is chosen because it provides the most direct access to the midbrain and medulla oblongata. Destroying these vital centers ensures the immediate cessation of fetal movements and cardiac activity, while also allowing for the collapse of the cranial vault. **Analysis of Incorrect Options:** * **Parietal Bone:** While the parietal bones are large, they are not the primary site for perforation in a standard craniotomy for cephalic presentations, as they do not offer the most direct route to the vital centers compared to the occipital approach. * **Palate:** Perforation through the hard palate is the specific technique used in cases of an **after-coming head in breech presentation**. It is not the standard site for a primary cephalic presentation. * **Frontal Bone:** This is avoided as it is thicker and does not provide optimal access to the brainstem. **NEET-PG High-Yield Pearls:** * **Instruments used:** Oldham’s Perforator is the standard instrument for skull perforation; Braun’s Cranioclast is used for extraction. * **After-coming head (Breech):** The preferred sites for perforation are the **hard palate** or the **suboccipital area** (below the occipital protuberance). * **Prerequisite:** The cervix must be fully dilated, and the pelvis must not be so contracted that vaginal delivery is impossible even after decompression.

Q: Formation of one of the following is essential for the success of this instrument?

Chignon. ***Chignon*** - **Chignon formation** is essential for successful **vacuum extraction** as it creates a secure seal between the vacuum cup and fetal scalp, allowing effective traction during delivery. - The **artificial caput** formed by chignon provides the necessary grip for the vacuum extractor to assist in guiding the fetal head through the birth canal. *Caput* - **Caput succedaneum** is a natural swelling of fetal scalp tissues that occurs during normal labor due to pressure against the cervix. - It is not essential for vacuum extraction success and may actually interfere with proper **cup placement** and seal formation. *Phlegmon* - **Phlegmon** refers to a spreading **bacterial infection** of soft tissues, which is a pathological condition unrelated to obstetric procedures. - It represents an **infectious complication** rather than a necessary component for any obstetric instrument function. *None of the above* - This option is incorrect as **chignon formation** is indeed essential for successful vacuum-assisted delivery. - The **artificial swelling** created by the vacuum cup is a prerequisite for maintaining adequate suction and safe fetal extraction.

Q: Which nerve is commonly injured during forceps delivery?

Obturator nerve. **Explanation:** The **obturator nerve (L2-L4)** is the most common nerve injured during a difficult forceps delivery. This injury occurs because the nerve runs along the lateral wall of the lesser pelvis, making it vulnerable to compression against the bony pelvis by the blades of the forceps or the fetal head during rotation and extraction. **Why the other options are incorrect:** * **Lateral cutaneous nerve of the thigh:** This is most commonly injured due to compression by the inguinal ligament (Meralgia paresthetica) or during pelvic surgeries, but it is not typically associated with forceps trauma. * **Common peroneal nerve:** This is the most common nerve injured during labor overall, but it is usually due to **prolonged lithotomy positioning** (compression against the stirrups) rather than the forceps application itself. * **Sciatic nerve:** While it can be compressed by the fetal head or forceps in rare, extreme cases, it is deeply situated and less frequently involved than the obturator nerve in this specific context. **Clinical Pearls for NEET-PG:** * **Obturator Nerve Injury Presentation:** Patients present with **weakness in adduction of the thigh** and sensory loss (numbness/paresthesia) over the medial aspect of the thigh. * **Femoral Nerve Injury:** Often occurs due to hyperflexion of the thighs in the lithotomy position; results in loss of knee extension and the patellar reflex. * **Key Distinction:** If the question asks for the most common nerve injury in **labor** (due to positioning), the answer is the **Common Peroneal Nerve**. If it specifies **forceps delivery**, the answer is the **Obturator Nerve**.

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

It is inserted into the posterior fornix.. **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.

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

Coarctation of aorta. **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).

Q: Episiotomy is best performed in which direction?

Mediolaterally. **Explanation:** Episiotomy is a surgically planned incision on the perineum during the second stage of labor. The **Mediolateral** approach is the gold standard and the most commonly performed technique worldwide. **1. Why Mediolateral is the Correct Answer:** The incision begins at the midpoint of the fourchette and is directed downwards and outwards at an angle of **45 degrees** toward the ischial tuberosity (usually to the right). This direction provides the best balance between increasing the vaginal outlet and protecting the anal sphincter. By directing the incision away from the midline, it significantly reduces the risk of **Third and Fourth-degree perineal tears** (extension into the anal sphincter and rectal mucosa). **2. Why Other Options are Incorrect:** * **Medial (Midline):** While it heals faster and has less blood loss, it carries a very high risk of extending into the anus, leading to rectovaginal fistulas or fecal incontinence. * **Lateral:** This incision starts 1 cm away from the midline. It is avoided because it may damage the **Bartholin’s duct** and provides poor anatomical repair. * **J-shaped:** This starts in the midline and curves laterally like a 'J' to avoid the anus. It is technically difficult to perform and repair, offering no superior benefit over the mediolateral approach. **High-Yield Clinical Pearls for NEET-PG:** * **Timing:** It should be performed when the perineum is bulging and **3-4 cm of the fetal scalp** is visible during a contraction (crowning). * **Structures Cut:** Skin, subcutaneous tissue, vaginal mucosa, **Bulbospongiosus**, and **Superficial transverse perineal muscles**. (Note: The Levator ani is usually not involved in a standard episiotomy). * **Nerve Block:** Usually performed under local infiltration or **Pudendal nerve block** (S2, S3, S4). * **Most Common Complication:** Perineal pain and dyspareunia.

Question 1

Hayman hemostatic suture is applied on which of the following?

Accepted Answer

Uterus in PPH

Answer

Vagina after biopsy

Answer

Fallopian tubes after reanastomosis

Answer

Ovaries after cystectomy

Question 2

In a patient with a head injury, which of the following bones is perforated during a craniotomy?

Accepted Answer

Occiput

Answer

Parietal

Answer

Palate

Answer

Frontal

Question 3

Formation of one of the following is essential for the success of this instrument?

Accepted Answer

Chignon

Answer

Caput

Answer

Phlegmon

Answer

None of the above.

Question 4

Which nerve is commonly injured during forceps delivery?

Accepted Answer

Obturator nerve

Answer

Lateral cutaneous nerve of the thigh

Answer

Common peroneal nerve

Answer

Sciatic nerve

Question 5

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

Accepted Answer

It is inserted into the posterior fornix.

Answer

It is derived from seaweed.

Answer

It is utilized for cervical dilatation.

Answer

A thread is attached for ease of removal.

Question 6

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

Accepted Answer

Coarctation of aorta

Answer

Pulmonary stenosis

Answer

Eisenmenger syndrome

Answer

Ebstein's anomaly

Question 7

Forceps may be applied for delivery for all situations listed below, EXCEPT?

Accepted Answer

Presenting part is at zero station

Answer

Sagittal suture of head is 15 degrees short of rotation in pelvis

Answer

Presenting part is face (mento anterior)

Answer

Presence of caput succedaneum

Question 8

Episiotomy is best performed in which direction?

Accepted Answer

Mediolaterally

Answer

Medially

Answer

Laterally

Answer

J-shaped

Question 9

A 26-year-old primipara at term gestation with labour pains presents with cervical dilation 3 cm, 60% effacement, meconium-stained liquor, and decreased fetal heart rate. What is the most appropriate management?

Accepted Answer

Provide oxygen and shift to the operating theatre for emergency lower segment caesarean section (LSCS).

Answer

Administer oxytocin drip to accelerate labour.

Answer

Administer IV drotaverine to improve cervical dilatation.

Answer

Attempt a vacuum delivery.

Question 10

Which of the following is NOT a benefit of surgical evacuation compared to medical regimens?

Accepted Answer

Invasive procedure

Answer

Lower failure rate

Answer

No need for follow-up

Answer

Predictable bleeding

Operative Obstetrics — MCQs

Operative Obstetrics — MCQs

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