Drainage Procedures — MCQs
Examine the abdominal X-ray shown. What is the most likely diagnosis based on the findings?
Identify the imaging modality given below.
What is the investigation of choice for blunt abdominal trauma in an unstable patient?
What is the 1st thing to be done to a patient with tension pneumothorax?
Which of these is the best for management of a 3 cm stone in renal pelvis without evidence of hydronephrosis?
The four points of probe placement in focused abdominal sonogram for trauma (FAST) in thoracoabdominal trauma are
What is the treatment of choice for a post-operative abscess?
Procedure of choice for control of massive hemoptysis?
Which of the following is best assessed by FAST USG?
Transjugular intrahepatic portosystemic shunt (TIPS) is contraindicated in which of the following conditions?
Drainage Procedures Indian Medical PG Practice Questions and MCQs
Question 1: Examine the abdominal X-ray shown. What is the most likely diagnosis based on the findings?
- A. Small bowel ileus
- B. Pneumoperitoneum
- C. Intestinal Obstruction (Correct Answer)
- D. Large bowel obstruction
Explanation: ***Intestinal Obstruction*** - The abdominal X-ray demonstrates **distended loops of bowel** with **multiple air-fluid levels**, which are classic radiographic signs of intestinal obstruction. - The presence of multiple, wide air-fluid levels visible in a **stepladder pattern** is a hallmark of bowel obstruction. - **Valvulae conniventes** (transverse folds crossing the entire width of bowel) suggest **small bowel** involvement when visible with distension. *Small bowel ileus* - While ileus can show distended bowel loops, it typically presents with **gas distributed throughout the small and large bowel** without a clear transition point. - Ileus shows **less pronounced air-fluid levels** and lacks the characteristic stepladder pattern seen in mechanical obstruction. - The clinical context and presence of multiple distinct air-fluid levels favor mechanical obstruction over ileus. *Large bowel obstruction* - Large bowel obstruction would show **dilated colon** with **haustrations** (incomplete folds that don't cross the entire lumen). - The obstruction would typically show dilation **proximal to the obstruction** with collapsed bowel distally. - The pattern in this image is more consistent with small bowel or generalized intestinal obstruction rather than isolated large bowel obstruction. *Pneumoperitoneum* - Pneumoperitoneum (free air in the peritoneal cavity) appears as **air under the diaphragm** on upright films or as **Rigler's sign** (both sides of bowel wall visible) on supine films. - This is a sign of **bowel perforation**, not obstruction with air-fluid levels within the bowel lumen. - The air-fluid levels seen here are **intraluminal**, not free intraperitoneal air.
Question 2: Identify the imaging modality given below.
- A. USG (Correct Answer)
- B. Fluoroscopy
- C. X-Ray
- D. MRI
Explanation: ***USG*** - The image displays characteristic **gray-scale imaging** with an **echogenic appearance** of tissues, typical of an ultrasound. - Presence of annotations like "10 MHz G 64%" for **frequency and gain**, and "PRC" suggest ultrasound parameters. *Fluoroscopy* - Fluoroscopy provides **real-time X-ray images** and often involves the use of contrast agents, appearing as a dynamic, darker image with high contrast. - The image lacks the distinct bone and air contrast and dynamic motion typical of fluoroscopy. *X-Ray* - X-ray images depict a **static shadowgram** of dense structures like bones as white, and air as black, with sharp delineation. - The image shows a **granular texture** and fluid-filled structures that are characteristic of soft tissue imaging through ultrasound, not X-ray. *MRI* - MRI produces **cross-sectional images** with high soft tissue contrast in multiple planes (axial, sagittal, coronal). - The image shows real-time B-mode ultrasound characteristics with **probe frequency notation**, not the slice-based imaging of MRI.
Question 3: What is the investigation of choice for blunt abdominal trauma in an unstable patient?
- A. X-ray abdomen
- B. MRI
- C. USG (Correct Answer)
- D. Diagnostic Peritoneal Lavage (DPL)
Explanation: ***USG (FAST Exam)*** - In an **unstable patient** with blunt abdominal trauma, **Focused Assessment with Sonography for Trauma (FAST) exam** is the investigation of choice. - It is **rapid, non-invasive, and bedside**, allowing immediate detection of **free fluid** (blood) in the peritoneal cavity, pericardium, and pleural spaces without transporting the patient. - Guides immediate decision for **laparotomy** in hemodynamically unstable patients. - **Note:** In **stable patients**, **CT abdomen** is the gold standard as it provides detailed anatomical information, but it requires patient transport and time. *X-ray abdomen* - Provides limited information in blunt trauma, primarily showing **free air** (bowel perforation) or **bony fractures**. - **Not sensitive** for detecting intraperitoneal bleeding, which is the primary concern in unstable patients. *MRI* - Offers excellent soft tissue detail but is **time-consuming** and requires the patient to be **hemodynamically stable**. - **Impractical** for unstable trauma patients requiring rapid assessment and intervention. *Diagnostic Peritoneal Lavage (DPL)* - An **invasive procedure** that is sensitive for detecting intra-abdominal hemorrhage. - Has largely been **replaced by FAST exam** in most trauma centers due to FAST being non-invasive, rapid, and repeatable. - DPL has a **higher false-positive rate** and cannot identify the source of bleeding.
Question 4: What is the 1st thing to be done to a patient with tension pneumothorax?
- A. Insertion of wide bore needle in the intercostal space (Correct Answer)
- B. Leave the patient at rest for air to be absorbed
- C. Water seal drainage
- D. None of the options
Explanation: ***Insertion of wide bore needle in the intercostal space*** - This procedure, known as **needle decompression**, is the immediate life-saving intervention for **tension pneumothorax**. - It rapidly releases trapped air from the pleural space, relieving pressure on the **heart and lungs**. *Leave the patient at rest for air to be absorbed* - **Tension pneumothorax** is a medical emergency requiring urgent intervention, not passive observation. - Leaving the patient at rest would lead to progressive **cardiovascular collapse** and death. *Water seal drainage* - **Water seal drainage**, or chest tube insertion, is the definitive treatment for pneumothorax but it is not the *first* step in a **tension pneumothorax**. - Needle decompression should be performed first for rapid stabilization before a chest tube can be inserted. *None of the options* - This option is incorrect because **needle decompression** is a crucial and immediate intervention for **tension pneumothorax**. - Delaying treatment has severe and potentially fatal consequences.
Question 5: Which of these is the best for management of a 3 cm stone in renal pelvis without evidence of hydronephrosis?
- A. Retrograde pyeloplasty
- B. ESWL
- C. PCNL (Correct Answer)
- D. Antegrade pyeloplasty
Explanation: ***PCNL*** - **Percutaneous nephrolithotomy (PCNL)** is the gold standard treatment for large renal stones (>2 cm) due to its high stone-free rates in a single procedure. - For a 3 cm renal pelvis stone, PCNL provides the best clearance rate (~95%) with minimal need for repeat procedures. - It involves direct percutaneous access to the kidney, allowing fragmentation and removal of large stone burden efficiently. *ESWL* - **Extracorporeal shock wave lithotripsy (ESWL)** has limited efficacy for stones >2 cm, with stone-free rates dropping to 50-60% for 3 cm stones. - Multiple sessions are typically required, with increased risk of steinstrasse (stone street) formation and residual fragments. - While non-invasive, ESWL is not the optimal choice for this stone size. *Retrograde pyeloplasty* - This option appears to reference **retrograde endoscopic approaches** (such as retrograde intrarenal surgery - RIRS or ureteroscopy). - While retrograde ureteroscopy can treat renal stones, it is generally reserved for stones <2 cm due to longer operative time and lower stone-free rates for larger stones. - True "pyeloplasty" is a reconstructive procedure for ureteropelvic junction obstruction, not a stone removal technique. *Antegrade pyeloplasty* - This option likely refers to **antegrade endoscopic access** to the renal pelvis. - While antegrade access is used in PCNL, "pyeloplasty" specifically means surgical reconstruction of the UPJ for obstruction, not stone treatment. - Antegrade ureteroscopy alone (without nephroscopy) would be less effective than PCNL for a 3 cm stone.
Question 6: The four points of probe placement in focused abdominal sonogram for trauma (FAST) in thoracoabdominal trauma are
- A. Hypogastrium, (R) and (L) lumbar region, (R) lower chest
- B. Epigastrium, (R) and (L) lumbar region, (R) lower chest
- C. Subxiphoid, (R) upper quadrant, (L) upper quadrant, suprapubic (Correct Answer)
- D. Epigastrium, (R) and (L) hypochondria, (R) iliac fossa
Explanation: ***Subxiphoid, (R) upper quadrant, (L) upper quadrant, suprapubic*** - These four areas represent the standard views for a **FAST exam**, designed to detect **free fluid** in the most gravity-dependent and common spaces for accumulation within the abdomen and pericardium. - The **subxiphoid view** assesses the pericardial sac, the **right upper quadrant** evaluates Morrison's pouch, the **left upper quadrant** examines the splenorenal recess, and the **suprapubic view** checks the rectovesical or uterovesical pouch. *Hypogastrium, (R) and (L) lumbar region, (R) lower chest* - The **lumbar regions** are not primary or standard FAST windows due to anatomical complexity and lower fluid accumulation likelihood. - While the lower chest can be part of an extended FAST, the specified regions (right and left lumbar) are not the typical, most critical points for initial trauma assessment. *Epigastrium, (R) and (L) lumbar region, (R) lower chest* - The **epigastrium** is not a standard primary FAST window for free fluid; the subxiphoid view specifically targets the pericardium. - Again, the **lumbar regions** are not part of the core four FAST views for rapid detection of intraperitoneal hemorrhage. *Epigastrium, (R) and (L) hypochondria, (R) iliac fossa* - The terms **hypochondria** and **iliac fossa** are less precise than the specific anatomical spaces targeted by FAST (Morrison's pouch, splenorenal recess, pelvic cul-de-sac). - The **epigastrium** is not one of the four established primary FAST windows for free fluid in trauma.
Question 7: What is the treatment of choice for a post-operative abscess?
- A. Hydration
- B. IV antibiotics
- C. Image guided aspiration (Correct Answer)
- D. Reexploration
Explanation: ***Image-guided aspiration*** - This is often the **first-line treatment** for a post-operative abscess, especially if it is well-localized. - It involves **draining the pus** under imaging guidance, relieving pressure and removing the infectious material. *Hydration* - While important for overall patient management, especially in cases of infection or sepsis, **hydration alone does not treat an abscess**. - It is a supportive measure but does not address the **localized collection of pus**. *IV antibiotics* - Antibiotics are typically indicated as an **adjunct to drainage**, especially in cases of systemic infection or cellulitis. - However, **antibiotics alone are often insufficient** to resolve an abscess as they have difficulty penetrating the necrotic core and thick capsule. *Reexploration* - **Surgical reexploration** is a more invasive option usually reserved for abscesses that are **large, multiloculated, not amenable to percutaneous drainage**, or when initial drainage attempts fail. - It carries greater risks and is not the initial treatment of choice for every post-operative abscess.
Question 8: Procedure of choice for control of massive hemoptysis?
- A. Rigid bronchoscopy and Photocoagulation
- B. Bronchial artery embolization (Correct Answer)
- C. Balloon catheter tamponade
- D. Flexible bronchoscopy and cautery
Explanation: ***Bronchial artery embolization*** - **Bronchial artery embolization (BAE)** is the preferred initial treatment for **massive hemoptysis** due to its high success rate and minimally invasive nature. - It works by identifying and occluding the bleeding bronchial arteries, which are the most common source of massive hemoptysis. *Rigid bronchoscopy and Photocoagulation* - **Rigid bronchoscopy** is primarily used for **airway control**, foreign body removal, and occasionally for direct visualization and tamponade in massive hemoptysis. - While **photocoagulation** can be used to treat small bleeds, it is generally ineffective for massive or widespread hemorrhage. *Balloon catheter tamponade* - **Balloon catheter tamponade** can provide temporary control of bleeding by compressing the bleeding site but is not a definitive long-term solution. - It carries risks of tracheal injury and can obstruct the airway, making it a bridging measure until a more definitive treatment can be performed. *Flexible bronchoscopy and cautery* - **Flexible bronchoscopy** is useful for localizing the bleeding site but is **less effective** for controlling massive hemoptysis due to limited suction and instrument channels. - **Cautery** applied through a flexible bronchoscope is generally insufficient for significant bleeding and carries a risk of worsening the hemorrhage.
Question 9: Which of the following is best assessed by FAST USG?
- A. Liver
- B. Pericardium (Correct Answer)
- C. Spleen
- D. Pleural cavity
Explanation: ***Pericardium*** - FAST USG is **most clinically significant** for detecting **pericardial effusions** and **cardiac tamponade** in trauma patients. - The **subxiphoid view** provides **excellent direct visualization** of the heart and pericardial space with minimal interference. - **Small volumes** of pericardial fluid (as little as 50-100 mL) are **clinically significant** and potentially life-threatening, requiring immediate intervention. - Cardiac tamponade is an **immediately reversible cause of shock** that demands urgent diagnosis and pericardiocentesis. - **Sensitivity >90%** for clinically significant pericardial effusions in the trauma setting. *Liver* - FAST assesses the **hepatorenal space (Morison's pouch)** for free fluid, not the liver parenchyma itself. - Requires **larger volumes of free fluid** (>200-500 mL) to be reliably detected in the peritoneal cavity. - Detailed assessment of actual liver injury requires **contrast-enhanced CT imaging**. *Spleen* - FAST evaluates the **splenorenal recess** for free fluid surrounding the spleen, not splenic parenchymal injury. - Detection depends on adequate volume of free fluid being present. - **CT scanning** is superior for defining splenic lacerations, hematomas, and grading injury severity. *Pleural cavity* - While Extended FAST (eFAST) can assess **pleural spaces** for effusion or pneumothorax, this is an **extension** of the standard 4-view FAST protocol. - Standard FAST focuses on the **four primary windows**: pericardial, perihepatic, perisplenic, and pelvic. - **Chest X-ray** and **CT** remain primary modalities for comprehensive thoracic assessment.
Question 10: Transjugular intrahepatic portosystemic shunt (TIPS) is contraindicated in which of the following conditions?
- A. Post-shunt encephalopathy
- B. Cirrhosis
- C. Portal vein thrombosis (Correct Answer)
- D. Variceal bleeding
Explanation: **Explanation:** **Transjugular Intrahepatic Portosystemic Shunt (TIPS)** is an interventional procedure where a shunt is created between the hepatic vein and the portal vein to reduce portal hypertension. **Why Portal Vein Thrombosis (PVT) is the correct answer:** The success of a TIPS procedure depends on the ability to access and pass a wire through the portal vein to establish the shunt. In cases of **extensive or cavernous portal vein thrombosis**, the target vessel is either occluded or replaced by small collateral vessels, making the procedure technically impossible or highly hazardous. While partial PVT is sometimes managed by experienced interventionists, complete PVT remains a classic **absolute contraindication** in standard practice. **Analysis of Incorrect Options:** * **Post-shunt encephalopathy (A):** This is a common **complication** of TIPS, not a contraindication for the initial procedure. However, pre-existing severe hepatic encephalopathy is a relative contraindication. * **Cirrhosis (B):** Cirrhosis with portal hypertension is the **primary indication** for TIPS (specifically for refractory ascites or variceal bleeding). * **Variceal bleeding (D):** This is a **major indication** for TIPS, especially when bleeding is refractory to endoscopic management (Rescue TIPS). **High-Yield Clinical Pearls for NEET-PG:** * **Absolute Contraindications:** Severe congestive heart failure (R-sided), severe pulmonary hypertension, and multiple hepatic cysts/polycystic liver disease. * **Relative Contraindications:** Active systemic infection, severe coagulopathy, and rapidly progressing hepatoma. * **MELD Score:** A MELD score >18 is associated with higher mortality post-TIPS. * **Mechanism:** TIPS bypasses the liver parenchyma, effectively converting sinusoidal portal hypertension into a side-to-side portocaval shunt.
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