Trauma — MCQs
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In a patient with head injury, unexplained hypotension warrants evaluation of which spinal region?
Rapid fluid resuscitation of the hypovolemic patient after abdominal trauma is significantly enhanced by which of the following?
AMPLE history includes all of the following except?
Which intervention is appropriate for the immediately life-threatening injury of laryngeal obstruction?
A person involved in a road traffic accident presents to the emergency department with a laceration of the inguinal region. Examination reveals swelling in the inguinal region and distal pulsation. The internal iliac artery is normal, as are the common iliac and external femoral arteries. However, the common femoral vein is transected. What is the treatment of choice?
According to triage, a patient having visible bleeding should be treated in which category?
The response to shock includes which of the following metabolic effects?
What are the aims of an abbreviated laparotomy?
All of the following are true about pancreatic injury except?
What are the indications for celiotomy in blunt trauma?
Trauma Indian Medical PG Practice Questions and MCQs
Question 661: In a patient with head injury, unexplained hypotension warrants evaluation of which spinal region?
- A. Upper cervical spine
- B. Lower cervical spine
- C. Thoracic spine (Correct Answer)
- D. Lumbar spine
Explanation: **Explanation:** In the setting of head injury, hypotension is rarely caused by the intracranial injury itself (except in terminal stages with medullary failure). Therefore, **unexplained hypotension** in a trauma patient must be attributed to occult hemorrhage or neurogenic shock until proven otherwise. **Why Thoracic Spine is correct:** The sympathetic outflow (thoracolumbar outflow) responsible for maintaining vascular tone and heart rate originates from the spinal cord segments **T1 to L2**. A spinal cord injury in the **thoracic region** (specifically above T6) disrupts these descending sympathetic pathways, leading to **Neurogenic Shock**. This results in loss of vasomotor tone (vasodilation) and loss of cardiac sympathetic innervation, manifesting as the classic triad of hypotension, bradycardia, and peripheral vasodilation. **Analysis of Incorrect Options:** * **Upper and Lower Cervical Spine:** While cervical injuries also cause neurogenic shock, they are typically associated with obvious respiratory distress (due to phrenic nerve involvement at C3-C5) or quadriplegia. In a patient where hypotension is the "unexplained" or primary finding, the thoracic sympathetic chain is the critical focus. * **Lumbar Spine:** The sympathetic outflow ends at L2. Injuries to the lower lumbar spine or cauda equina do not typically result in systemic neurogenic shock because the majority of the sympathetic chain remains intact above the level of injury. **Clinical Pearls for NEET-PG:** * **Rule of Thumb:** In trauma, hypotension + tachycardia = Hypovolemic shock; hypotension + bradycardia = Neurogenic shock. * **Cushing’s Triad:** In head injury, *hypertension* (not hypotension) associated with bradycardia and irregular respiration indicates increased intracranial pressure. * **Initial Management:** Always prioritize fluid resuscitation; if hypotension persists despite volume replacement in suspected neurogenic shock, vasopressors (e.g., Noradrenaline) are indicated.
Question 662: Rapid fluid resuscitation of the hypovolemic patient after abdominal trauma is significantly enhanced by which of the following?
- A. Placement of long 18-gauge subclavian vein catheters
- B. Placement of percutaneous femoral vein catheters
- C. Bilateral saphenous vein cutdowns
- D. Placement of short, large-bore percutaneous peripheral intravenous catheters (Correct Answer)
Explanation: The core principle governing rapid fluid resuscitation is **Poiseuille’s Law**, which states that the flow rate of a fluid is directly proportional to the fourth power of the radius of the catheter and inversely proportional to its length. Therefore, to maximize flow, one must use a catheter with the **largest possible diameter** and the **shortest possible length**. ### Why the correct answer is right: **Option D (Short, large-bore peripheral IVs):** Short, large-gauge (e.g., 14G or 16G) peripheral catheters provide the least resistance to flow. Two such catheters placed in the antecubital fossae are the gold standard for initial resuscitation in trauma (ATLS guidelines), as they can deliver fluid faster than standard central venous pressure (CVP) lines. ### Why the other options are incorrect: * **Option A:** Subclavian catheters are typically **long**, which increases resistance and decreases flow rate. Additionally, 18-gauge is narrower than the 14-16 gauge preferred for trauma. * **Option B:** While femoral veins are large, percutaneous central lines are longer than peripheral ones, limiting the speed of resuscitation compared to short peripheral bores. * **Option C:** Saphenous vein cutdowns were historically common but are now a second-line "last resort" if peripheral access fails. They are time-consuming and carry a higher risk of infection compared to percutaneous access. ### High-Yield Clinical Pearls for NEET-PG: * **Poiseuille’s Law:** Flow $\propto r^4 / L$. Radius ($r$) is the most important factor; Length ($L$) is the second most important. * **ATLS Protocol:** The preferred initial access is two large-bore (14-16 gauge) peripheral IV lines. * **Central Lines:** Standard triple-lumen CVP catheters are **not** ideal for rapid resuscitation due to their length and narrow internal diameters. * **Intraosseous (IO) Access:** If peripheral access cannot be obtained within 2 attempts or 90 seconds, IO access is the preferred next step in both adults and children.
Question 663: AMPLE history includes all of the following except?
- A. Allergy
- B. Personal history (Correct Answer)
- C. Last meal
- D. Medication
Explanation: In trauma management, the **AMPLE history** is a high-yield mnemonic used during the **Secondary Survey** to gather essential clinical information quickly when a patient is stabilized but a detailed history is not yet possible. ### Why "Personal History" is the Correct Answer The "P" in AMPLE stands for **Past Medical History** (including pregnancy) and **Previous illnesses/surgeries**, not "Personal history." In medical terminology, personal history typically refers to social habits (smoking, alcohol, diet), which are not immediate priorities in the acute management of a trauma patient. ### Explanation of Incorrect Options The components of the AMPLE mnemonic are: * **A – Allergy:** Crucial to avoid administering medications (like Penicillin or Latex) that could cause anaphylaxis during emergency surgery. * **M – Medications:** Identifies drugs currently taken by the patient (e.g., anticoagulants like Warfarin/Aspirin which increase bleeding risk, or Beta-blockers which mask tachycardia). * **P – Past Medical History/Pregnancy:** Identifies underlying comorbidities (DM, HTN, Asthma) or pregnancy status. * **L – Last Meal:** Essential for the anesthesiologist to assess the risk of **aspiration** during induction of general anesthesia. * **E – Events/Environment:** Understanding the mechanism of injury (e.g., fall height, speed of vehicle) helps predict specific injury patterns. ### High-Yield Clinical Pearls for NEET-PG * **Timing:** AMPLE history is performed during the **Secondary Survey**, whereas the **Primary Survey** focuses on ABCDE (Life-threatening injuries). * **The "L" Rule:** A patient is generally considered to have a "full stomach" if they have eaten within **6 hours** of the trauma; however, in trauma, gastric emptying is delayed, so all trauma patients are treated as having a full stomach. * **Mnemonic Variation:** Do not confuse AMPLE with **MIST** (Mechanism, Injuries, Signs, Treatment), which is used by paramedics for handovers.
Question 664: Which intervention is appropriate for the immediately life-threatening injury of laryngeal obstruction?
- A. Endotracheal intubation
- B. Cricothyroidotomy (Correct Answer)
- C. Subxiphoid window
- D. Tube thoracostomy
Explanation: **Explanation:** In the management of trauma, the primary survey follows the **ABCDE** protocol. Airway obstruction is the most immediate threat to life. When a patient presents with **laryngeal obstruction** (due to trauma, edema, or foreign body), the upper airway is physically blocked, making standard orotracheal or nasotracheal intubation difficult or impossible. **Why Cricothyroidotomy is correct:** A **Cricothyroidotomy** is the preferred emergency surgical airway in an "unable to intubate, unable to ventilate" scenario. It is faster and technically easier to perform than a formal tracheostomy because the cricothyroid membrane is subcutaneous and relatively avascular. It bypasses the laryngeal obstruction entirely to provide immediate oxygenation. **Analysis of Incorrect Options:** * **A. Endotracheal intubation:** While the first-line for most airway issues, it is often contraindicated or physically impossible in the presence of a direct laryngeal obstruction or severe maxillofacial trauma. * **C. Subxiphoid window:** This is a diagnostic/therapeutic procedure used to identify **pericardial tamponade** (Circulation), not an airway intervention. * **D. Tube thoracostomy:** This is the treatment for **tension pneumothorax** or hemothorax (Breathing), which are life-threatening but do not address an obstructed upper airway. **High-Yield Clinical Pearls for NEET-PG:** * **Surgical Airway of Choice:** In emergencies, it is always Cricothyroidotomy. * **Age Contraindication:** Needle cricothyroidotomy (with jet ventilation) is preferred in children **under 12 years** to avoid permanent laryngeal damage/subglottic stenosis. * **Definitive Airway:** Defined by a tube in the trachea with the cuff inflated, connected to oxygen. * **Laryngeal Trauma Triad:** Hoarseness, subcutaneous emphysema, and palpable fracture.
Question 665: A person involved in a road traffic accident presents to the emergency department with a laceration of the inguinal region. Examination reveals swelling in the inguinal region and distal pulsation. The internal iliac artery is normal, as are the common iliac and external femoral arteries. However, the common femoral vein is transected. What is the treatment of choice?
- A. Vein repair with continuity (Correct Answer)
- B. Sclerotherapy
- C. Ligation of the femoral artery and vein
- D. Amputation below the knee
Explanation: **Explanation:** The management of vascular trauma follows the principle of restoring perfusion and maintaining venous drainage to prevent limb-threatening complications. **1. Why "Vein repair with continuity" is correct:** The **common femoral vein (CFV)** is the primary conduit for venous return from the lower extremity. In the setting of trauma, the current standard of care for major axial veins (like the common femoral, popliteal, or axillary veins) is **primary repair or reconstruction**. Maintaining venous continuity prevents acute venous hypertension, which can lead to: * **Phlegmasia cerulea dolens:** Severe venous congestion that can compromise arterial inflow and lead to gangrene. * **Compartment Syndrome:** Increased venous pressure leads to interstitial edema and elevated compartment pressures. * **Chronic Venous Insufficiency:** Long-term morbidity including persistent edema and ulceration. **2. Why other options are incorrect:** * **Sclerotherapy:** This is used for the treatment of varicose veins or telangiectasias, not for acute traumatic transections of major vessels. * **Ligation of the femoral artery and vein:** Ligation of the artery is contraindicated here as the arterial system is intact. Ligation of the CFV is a "life-over-limb" maneuver used only in unstable (damage control) patients; in a stable patient, it carries a high risk of limb loss or severe morbidity. * **Amputation:** This is a last resort for non-salvageable limbs with extensive tissue destruction or prolonged ischemia, which is not indicated here as the arterial supply is normal. **Clinical Pearls for NEET-PG:** * **Vascular Repair Priority:** In combined injuries, the rule is **"Artery first, then Vein"** to restore inflow, though some surgeons prefer temporary shunts. * **Popliteal Vein:** Along with the CFV, the popliteal vein is considered a "critical" vein where repair is strongly preferred over ligation. * **Hard Signs of Vascular Injury:** Pulsatile bleeding, expanding hematoma, thrill/bruit, and the 6 P’s of ischemia (Pain, Pallor, Pulselessness, Paresthesia, Paralysis, Poikilothermia).
Question 666: According to triage, a patient having visible bleeding should be treated in which category?
- A. Emergency (Correct Answer)
- B. Delayed
- C. Minimal treatment
- D. No treatment
Explanation: **Explanation:** In disaster management and mass casualty incidents, **Triage** is the process of prioritizing patients based on the severity of their condition and the urgency of treatment required. **1. Why Emergency (Red Tag) is correct:** Visible, active bleeding indicates a life-threatening condition that requires immediate intervention to prevent hemorrhagic shock and death. In the standard triage system, patients with compromised "ABC" (Airway, Breathing, or **Circulation**) are categorized as **Red Tag (Immediate/Emergency)**. These patients have a high probability of survival if treated immediately but will likely die if treatment is delayed. **2. Why the other options are incorrect:** * **Delayed (Yellow Tag):** This category is for "stable" patients who require systemic treatment or surgery but whose life is not in immediate danger (e.g., large wounds without active bleeding, stable fractures). * **Minimal Treatment (Green Tag):** Also known as the "walking wounded," these patients have minor injuries (e.g., abrasions, minor sprains) that can wait several hours for care. * **No Treatment (Black Tag):** This is reserved for the deceased or those with injuries so catastrophic that survival is unlikely even with maximal care in a resource-limited setting. **Clinical Pearls for NEET-PG:** * **Color Coding:** Red (Immediate), Yellow (Delayed), Green (Ambulatory/Minimal), Black (Dead/Expectant). * **START Protocol:** The "Simple Triage and Rapid Treatment" (START) uses three criteria: **Respirations, Perfusion (Capillary refill/Pulse), and Mental Status (RPM).** * **Golden Hour:** The first 60 minutes after trauma where prompt medical intervention has the highest likelihood of preventing death. * **Revised Trauma Score (RTS):** Includes Glasgow Coma Scale (GCS), Systolic Blood Pressure, and Respiratory Rate.
Question 667: The response to shock includes which of the following metabolic effects?
- A. Increase in sodium and water excretion
- B. Increase in renal perfusion
- C. Decrease in cortisol levels
- D. Hyperkalemia (Correct Answer)
Explanation: **Explanation:** The metabolic response to shock is a complex physiological attempt to maintain homeostasis and preserve vital organ perfusion. **Why Hyperkalemia is Correct:** During shock (particularly hypovolemic or cardiogenic), tissue hypoxia leads to a shift from aerobic to **anaerobic metabolism**, resulting in lactic acidosis. To buffer the excess hydrogen ions ($H^+$), the body moves them into the cells in exchange for potassium ($K^+$) moving out into the extracellular fluid. Furthermore, decreased renal perfusion leads to a drop in the glomerular filtration rate (GFR), impairing the kidneys' ability to excrete potassium. Cell death and membrane instability also contribute to the release of intracellular potassium, leading to **hyperkalemia**. **Why the other options are incorrect:** * **A & B: Increase in sodium/water excretion and renal perfusion:** In shock, the body activates the Renin-Angiotensin-Aldosterone System (RAAS) and releases ADH (Vasopressin). This causes **sodium and water retention** and vasoconstriction to maintain blood pressure. Renal perfusion actually **decreases** as blood is shunted toward the heart and brain. * **C: Decrease in cortisol levels:** Shock is a major physiological stressor. The hypothalamic-pituitary-adrenal axis is activated, leading to an **increase in cortisol** and catecholamines to mobilize glucose and maintain vascular tone. **NEET-PG High-Yield Pearls:** * **Hyperglycemia** is common in early shock due to increased glycogenolysis and gluconeogenesis (driven by cortisol and adrenaline). * **Metabolic Acidosis** with an elevated anion gap (due to lactate) is the hallmark of the metabolic response. * **Negative Nitrogen Balance:** Shock induces a catabolic state, leading to protein breakdown and increased urinary nitrogen excretion.
Question 668: What are the aims of an abbreviated laparotomy?
- A. Decreased chance of infection
- B. Early ambulation
- C. Early wound healing
- D. Hemostasis (Correct Answer)
Explanation: **Explanation:** The concept of an **abbreviated laparotomy** is the surgical cornerstone of **Damage Control Surgery (DCS)**. It is performed in critically ill trauma patients who are physiological exhausted, manifesting the "Lethal Triad" of acidosis, hypothermia, and coagulopathy. **Why Hemostasis is Correct:** The primary objective of an abbreviated laparotomy is not definitive repair, but rather **rapid physiological restoration**. The surgery focuses exclusively on: 1. **Control of hemorrhage (Hemostasis):** Using packs, ligatures, or shunts. 2. **Control of contamination:** Using staples or rapid closure to prevent further soilage. Once these life-threatening issues are addressed, the abdomen is closed temporarily (e.g., Bogota bag or VAC), and the patient is moved to the ICU for resuscitation. **Why Incorrect Options are Wrong:** * **A. Decreased chance of infection:** Abbreviated laparotomy actually carries a *higher* risk of infection and abscess formation due to the use of intra-abdominal packing and temporary closure. * **B. Early ambulation:** These patients are critically unstable, often intubated, and require intensive care; early mobility is not a priority in the acute phase. * **C. Early wound healing:** The wound is intentionally left open (laparostomy) to prevent Abdominal Compartment Syndrome, which delays primary wound healing. **High-Yield Clinical Pearls for NEET-PG:** * **The Lethal Triad:** Acidosis (pH <7.2), Hypothermia (<35°C), and Coagulopathy. * **Stages of DCS:** 1. Patient selection. 2. Stage I: Abbreviated Laparotomy (Hemostasis & Contamination control). 3. Stage II: ICU Resuscitation (Rewarming & Correction of coagulopathy). 4. Stage III: Planned Re-operation (Definitive repair and pack removal). * **Indication:** pH < 7.2, Temperature < 34°C, or massive transfusion (>10 units).
Question 669: All of the following are true about pancreatic injury except?
- A. Penetrating injuries are common
- B. Commonly isolated injuries occur (Correct Answer)
- C. Serum amylase is raised
- D. Peritoneal lavage is not helpful for diagnosis
Explanation: **Explanation:** **1. Why Option B is the Correct Answer (The "Except" statement):** Pancreatic injuries are **rarely isolated**. Due to its deep retroperitoneal location and proximity to major structures, the pancreas is protected by the stomach, liver, and rib cage. Consequently, any force significant enough to injure the pancreas usually damages adjacent organs. In blunt trauma, associated injuries occur in approximately 90% of cases (commonly the liver, spleen, and duodenum), while in penetrating trauma, the rate is nearly 100% (often involving major vascular structures like the aorta or vena cava). **2. Analysis of Incorrect Options:** * **Option A:** Penetrating injuries (gunshot wounds or stabbings) are indeed a common cause of pancreatic trauma in urban settings, often resulting in more severe multi-organ damage compared to blunt trauma. * **Option C:** Serum amylase is frequently raised in pancreatic trauma. However, it is important to note that it is **neither sensitive nor specific**; levels can be normal in 25-40% of major ductal injuries or elevated in non-pancreatic conditions (e.g., salivary gland injury, bowel ischemia). * **Option D:** Diagnostic Peritoneal Lavage (DPL) is notoriously unreliable for pancreatic injury because the pancreas is a **retroperitoneal organ**. DPL primarily detects intraperitoneal hemorrhage and may miss retroperitoneal pathologies entirely. **Clinical Pearls for NEET-PG:** * **Gold Standard Investigation:** Contrast-Enhanced CT (CECT) is the investigation of choice in hemodynamically stable patients. * **Management Determinant:** The integrity of the **Main Pancreatic Duct** is the most important factor determining management and prognosis (Grade III+ injuries usually require surgery). * **Classic Mechanism:** Blunt injury often occurs due to a direct blow to the epigastrium (e.g., bicycle handlebar injury or steering wheel impact), compressing the pancreas against the vertebral column.
Question 670: What are the indications for celiotomy in blunt trauma?
- A. Grade I spleen damage
- B. Grade II liver damage
- C. Peritoneal air on imaging (Correct Answer)
- D. All of the above
Explanation: In blunt abdominal trauma, the decision to perform a **celiotomy (laparotomy)** is based on evidence of hollow viscus injury, ongoing hemorrhage, or peritonitis. ### Why "Peritoneal air on imaging" is correct: The presence of **pneumoperitoneum** (free air under the diaphragm) is a pathognomonic sign of a **hollow viscus perforation** (e.g., stomach, duodenum, or bowel). In the context of trauma, this indicates an absolute emergency requiring immediate surgical exploration to repair the perforation and prevent fecal contamination or chemical peritonitis. ### Why the other options are incorrect: * **Grade I Spleen & Grade II Liver Damage:** Modern trauma management prioritizes **Non-Operative Management (NOM)** for hemodynamically stable patients with solid organ injuries. Low-grade injuries (Grade I-III) are successfully managed with observation, serial imaging, and bed rest in over 80-90% of cases. Surgery is only indicated if the patient becomes hemodynamically unstable or shows signs of peritonitis. ### High-Yield Clinical Pearls for NEET-PG: * **Absolute Indications for Celiotomy in Blunt Trauma:** 1. Hemodynamic instability with a positive FAST (Focused Assessment with Sonography for Trauma). 2. Evisceration of bowel or omentum. 3. Peritonitis (rebound tenderness, guarding). 4. Pneumoperitoneum (free air). 5. Positive Diagnostic Peritoneal Lavage (DPL) showing >10ml gross blood or >100,000 RBCs/mm³. * **The "Gold Standard"** for stable blunt trauma patients is a **CECT Abdomen**, which helps grade solid organ injuries and guides NOM. * **Seatbelt Sign:** Always suspect mesenteric or hollow viscus injury; these often require celiotomy even if initial scans are equivocal.
Practice by Chapter
Initial Assessment of Trauma Patient
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Advanced Trauma Life Support (ATLS) Principles
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Chest Trauma
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Abdominal Trauma
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Head Trauma
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Spinal Trauma
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Extremity Trauma
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Vascular Trauma
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Genitourinary Trauma
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Burns Management
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Mass Casualty Management
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Damage Control Surgery
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