Minimally Invasive Surgery Indian Medical PG Practice Questions and MCQs
Practice Indian Medical PG questions for Minimally Invasive Surgery. These multiple choice questions (MCQs) cover important concepts and help you prepare for your exams.
Minimally Invasive Surgery Indian Medical PG Question 1: Match the following
1. Hirschsprung's disease
2. Posterior urethral valve
3. Choledochal cyst
4. Intussusception
A. Jaundice
B. Currant jelly stools
C. Distended abdomen
D. Oligohydramnios
- A. 1-C, 2-D, 3-B, 4-A
- B. 1-A, 2-D, 3-B, 4-C
- C. 1-C, 2-D, 3-A, 4-B (Correct Answer)
- D. 1-D, 2-C, 3-A, 4-B
Minimally Invasive Surgery Explanation: ***Correct Answer: 1-C, 2-D, 3-A, 4-B***
**Correct Associations:**
- **Hirschsprung's disease (1) → Distended abdomen (C)**: Congenital absence of ganglion cells in the distal bowel leads to functional obstruction and subsequent abdominal distension. This is a hallmark presentation in neonates and infants.
- **Posterior urethral valve (2) → Oligohydramnios (D)**: Urethral obstruction in utero prevents normal fetal urine output, resulting in decreased amniotic fluid (oligohydramnios). This can be detected on prenatal ultrasound.
- **Choledochal cyst (3) → Jaundice (A)**: Congenital dilatation of the bile ducts causes biliary obstruction, presenting with jaundice as part of the classic triad (jaundice, abdominal mass, and pain).
- **Intussusception (4) → Currant jelly stools (B)**: Telescoping of bowel causes mucosal ischemia and venous congestion, leading to bloody mucoid stools with characteristic "currant jelly" appearance. This is a pathognomonic feature.
*Incorrect: 1-C, 2-D, 3-B, 4-A*
- Incorrectly associates choledochal cyst with currant jelly stools (which is specific to intussusception) and intussusception with jaundice (which indicates biliary pathology).
*Incorrect: 1-A, 2-D, 3-B, 4-C*
- Wrongly links Hirschsprung's disease with jaundice instead of its characteristic abdominal distension, and misidentifies intussusception's primary feature.
*Incorrect: 1-D, 2-C, 3-A, 4-B*
- Swaps the associations between Hirschsprung's disease and PUV. Oligohydramnios is specific to urinary tract obstruction (PUV), not intestinal pathology (Hirschsprung's).
Minimally Invasive Surgery Indian Medical PG Question 2: Trendelenburg position produces decrease in all of the following except –
- A. Compliance
- B. Functional residual capacity
- C. Respiratory rate (Correct Answer)
- D. Vital capacity
Minimally Invasive Surgery Explanation: ***Respiratory rate***
- Trendelenburg position (head down, feet elevated) increases **venous return** to the heart and **intrathoracic blood volume**.
- This position does not directly or consistently decrease the respiratory rate; instead, it might even slightly increase it due to **increased intrathoracic pressure** and reduced lung compliance.
*Compliance*
- The Trendelenburg position causes **abdominal contents** to shift towards the diaphragm, increasing **intra-abdominal pressure**.
- This upward pressure on the diaphragm restricts its movement and reduces the **compliance** of the respiratory system, making it harder to inflate the lungs.
*Functional residual capacity*
- The cephalad displacement of the diaphragm by abdominal contents in the Trendelenburg position significantly reduces the **volume of air remaining in the lungs** after a normal exhalation.
- This leads to a decrease in **functional residual capacity (FRC)**.
*Vital capacity*
- The decreased lung compliance and reduced FRC due to the elevated diaphragm in the Trendelenburg position make it more difficult for the lungs to fully expand.
- This restriction can lead to a decrease in the **maximum amount of air** a person can exhale after a maximal inhalation, thus reducing **vital capacity**.
Minimally Invasive Surgery Indian Medical PG Question 3: Structure not forming boundaries of the "Triangle of doom" seen during laparoscopic inguinal hernia surgery dissection is:
- A. Spermatic cord vessels
- B. Vas deferens
- C. Peritoneum
- D. Inferior epigastric artery (Correct Answer)
Minimally Invasive Surgery Explanation: ***Inferior epigastric artery***
- The **inferior epigastric artery** does NOT form a boundary of the **"Triangle of Doom"** during laparoscopic inguinal hernia repair.
- Instead, it forms the **lateral boundary of Hesselbach's triangle** and the **medial boundary of the "Triangle of Pain"** (another important anatomical landmark containing the lateral femoral cutaneous nerve and genitofemoral nerve).
- The Triangle of Doom is bounded by the **vas deferens medially**, the **spermatic vessels (gonadal vessels) laterally**, and the **peritoneal reflection inferiorly**.
*Spermatic cord vessels*
- The **spermatic vessels (testicular artery and pampiniform plexus)** form the **lateral boundary** of the **"Triangle of Doom."**
- This triangle contains the **external iliac artery and vein**, which pose significant risk of major hemorrhage if injured.
- Careful identification of these vessels is crucial to avoid devastating vascular complications.
*Vas deferens*
- The **vas deferens** forms the **medial boundary** of the **"Triangle of Doom."**
- This structure runs within the spermatic cord and must be carefully preserved to prevent male infertility.
- Injury to the vas deferens during dissection can result in permanent reproductive consequences.
*Peritoneum*
- The **peritoneum (peritoneal reflection)** forms the **base/inferior boundary** of the **"Triangle of Doom."**
- This serous membrane provides the anatomical floor of the triangle during laparoscopic visualization.
- Understanding the peritoneal boundaries helps surgeons safely navigate this high-risk anatomical area.
Minimally Invasive Surgery Indian Medical PG Question 4: Among the following conditions, laparoscopy carries the highest risk in patients with:
- A. COPD (Correct Answer)
- B. Diabetes
- C. Hypertension
- D. Obesity
Minimally Invasive Surgery Explanation: ***COPD***
- **COPD** patients have severely compromised respiratory function, and the **pneumoperitoneum** from CO2 insufflation causes **diaphragmatic splinting** and reduced lung compliance, leading to dangerous **CO2 retention** and respiratory failure.
- The increased **intra-abdominal pressure** significantly impairs ventilation in patients who already have limited respiratory reserve, making laparoscopy extremely high-risk.
*Diabetes*
- While diabetes increases risks of **poor wound healing** and **infection**, these complications are not specifically worse with laparoscopy compared to open surgery.
- **Perioperative glucose management** can effectively control diabetes-related risks, and laparoscopy may actually offer benefits like smaller incisions.
*Hypertension*
- **Hypertension** requires careful **blood pressure monitoring** during surgery but doesn't pose risks unique to laparoscopic procedures.
- Well-controlled hypertension with appropriate **antihypertensive medications** allows for safe laparoscopic surgery.
*Obesity*
- **Obesity** makes laparoscopy technically challenging due to **thick abdominal walls** and need for higher insufflation pressures.
- However, laparoscopy is often **preferred over open surgery** in obese patients due to reduced wound complications and faster recovery.
Minimally Invasive Surgery Indian Medical PG Question 5: Regarding laparoscopic cholecystectomy, which of the following statements is correct?
- A. It is primarily done for cholecystitis in the third trimester of pregnancy
- B. It is associated with higher rate of bile duct injuries than open cholecystectomy (Correct Answer)
- C. It is safer than open cholecystectomy in patients with cardiorespiratory disease
- D. It is contraindicated in acute cholecystitis
Minimally Invasive Surgery Explanation: ***It is associated with higher rate of bile duct injuries than open cholecystectomy***
- **Historically**, laparoscopic cholecystectomy has been associated with a **higher rate of bile duct injuries** (0.4-0.6%) compared to open cholecystectomy (0.1-0.2%), particularly during the **learning curve period** in the 1990s.
- Contributing factors include **limited visualization**, **altered anatomy** in acute inflammation, **reliance on 2D imaging**, and **misidentification of anatomic structures**.
- Bile duct injuries, such as **common bile duct (CBD) laceration** or **transection**, can lead to significant morbidity.
- **Note**: With increased surgeon experience and adoption of the **critical view of safety** technique, these rates have decreased, though the risk remains slightly higher than open surgery in some studies.
*It is primarily done for cholecystitis in the third trimester of pregnancy*
- **Laparoscopic cholecystectomy** during pregnancy is generally considered safe for symptomatic **gallstone disease**, with the **second trimester** being the optimal time for surgery.
- In the **third trimester**, surgical considerations like **increased uterine size**, technical difficulty, and **fetal well-being** make laparoscopic surgery more challenging, and it is usually **deferred until after delivery** unless an emergency.
- The primary indication for **cholecystectomy** is symptomatic gallstones or complications like **acute cholecystitis**, not specifically third trimester pregnancy.
*It is safer than open cholecystectomy in patients with cardiorespiratory disease*
- While **laparoscopic cholecystectomy** is generally associated with **less postoperative pain**, **reduced pulmonary complications**, and **faster recovery**, it involves **pneumoperitoneum** (CO2 insufflation), which increases intra-abdominal pressure.
- **Pneumoperitoneum** can cause **decreased venous return**, **increased systemic vascular resistance**, **hypercarbia**, and **decreased lung compliance**, which may stress patients with severe **cardiorespiratory disease**.
- The safety profile depends on individual patient factors, severity of cardiorespiratory disease, and anesthetic management. In many cases, the benefits of minimally invasive surgery outweigh the risks, but careful patient selection is essential.
*It is contraindicated in acute cholecystitis*
- This is **incorrect**. **Laparoscopic cholecystectomy** is the **gold standard treatment** for acute cholecystitis.
- **Early laparoscopic cholecystectomy** (within **72 hours** of symptom onset) is preferred as it reduces complications, shortens hospital stay, and has better outcomes compared to delayed surgery.
- Acute cholecystitis is an **indication**, not a **contraindication** for laparoscopic approach.
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