Trauma — MCQs

Trauma Indian Medical PG Practice Questions and MCQs

Question 571: What is the most important aspect of management of burn injury in the first 24 hours?

A. Fluid resuscitation (Correct Answer)
B. Dressing
C. Escharotomy
D. Antibiotics

Explanation: **Explanation:** The primary goal in the management of major burns during the first 24 hours (the **emergent phase**) is the prevention and treatment of **hypovolemic (burn) shock**. Burn injuries lead to a massive systemic inflammatory response, causing increased capillary permeability and "third-spacing" of fluids. This results in a rapid depletion of intravascular volume. Therefore, **Fluid Resuscitation** is the most critical intervention to maintain organ perfusion and prevent acute kidney injury. **Why other options are incorrect:** * **Dressing:** While important for wound care and preventing heat loss, it is secondary to hemodynamic stabilization. * **Escharotomy:** This is a life- or limb-saving procedure indicated only in circumferential full-thickness burns causing compartment syndrome or respiratory compromise. It is not the "most important" general management step for all burn patients. * **Antibiotics:** Prophylactic systemic antibiotics are **not recommended** in the early management of burns as they do not prevent wound sepsis and may promote the growth of resistant organisms. **High-Yield Clinical Pearls for NEET-PG:** * **Parkland Formula:** The gold standard for fluid calculation in the first 24 hours is **4 mL × Body Weight (kg) × % TBSA** (Total Body Surface Area). * **Fluid Choice:** **Ringer’s Lactate** is the fluid of choice. * **Timing:** Half of the calculated fluid is given in the first 8 hours (from the time of injury), and the remaining half over the next 16 hours. * **Monitoring:** The most reliable indicator of adequate fluid resuscitation is **Urinary Output** (Target: 0.5–1.0 mL/kg/hr in adults).

Question 572: A 50-year-old chronic alcoholic, while having dinner, suddenly becomes aphonic and presents with respiratory distress. What is the immediate management?

A. Cricothyroidotomy
B. Emergency tracheostomy
C. Humidified oxygen
D. Heimlich maneuver (Correct Answer)

Explanation: ### Explanation **Correct Option: D. Heimlich maneuver** The clinical presentation describes a classic **"Cafe Coronary"** syndrome. This occurs when a large bolus of food (often poorly chewed meat) becomes impacted in the larynx or pharynx, causing sudden airway obstruction. **Why it is correct:** The patient presents with the "Universal Sign of Choking" (respiratory distress and aphonia—the inability to speak). In a conscious adult with complete airway obstruction, the **Heimlich maneuver (subdiaphragmatic abdominal thrusts)** is the immediate management of choice. It works by elevating the diaphragm, increasing intrathoracic pressure, and creating an "artificial cough" to expel the foreign body. Chronic alcoholism is a known risk factor as it impairs the gag reflex and coordination during swallowing. **Why other options are incorrect:** * **A & B (Cricothyroidotomy/Tracheostomy):** These are invasive surgical airways. They are indicated only if non-invasive maneuvers (Heimlich) and direct laryngoscopy fail to clear the obstruction. * **C (Humidified oxygen):** This is ineffective in complete mechanical obstruction. Oxygen cannot reach the lungs if the upper airway is physically blocked by a food bolus. **High-Yield Clinical Pearls for NEET-PG:** 1. **Sequence of Action:** * **Conscious patient:** Heimlich maneuver (Abdominal thrusts). * **Unconscious patient:** Start CPR (Chest compressions are more effective at generating airway pressure than abdominal thrusts in an unconscious victim). 2. **Special Populations:** Use **Chest thrusts** instead of abdominal thrusts for pregnant women or morbidly obese patients. 3. **Infants (<1 year):** Use a combination of 5 back blows and 5 chest thrusts; abdominal thrusts are contraindicated due to the risk of liver injury. 4. **The "Death Silence":** Aphonia is the hallmark of *complete* obstruction. If the patient can cough or speak, the obstruction is partial, and the Heimlich maneuver should *not* be performed.

Question 573: What is the most common complication following blunt injury to the thorax?

A. Pneumothorax
B. Rib fracture (Correct Answer)
C. Haemopneumothorax
D. Aortic rupture

Explanation: **Explanation:** **1. Why Rib Fracture is the Correct Answer:** Rib fractures are the **most common injury** identified following blunt thoracic trauma, occurring in approximately 50% of patients admitted for chest injuries. They serve as a primary indicator of the severity of the impact. In clinical practice, the 4th through 9th ribs are most frequently involved because they are relatively thin and less protected by overlying musculature compared to the upper ribs. **2. Analysis of Incorrect Options:** * **A. Pneumothorax:** While common, it is usually a *consequence* of a rib fracture (where a jagged bone end punctures the lung) or sudden barotrauma. It occurs less frequently than the fractures themselves. * **C. Haemopneumothorax:** This represents a combination of air and blood in the pleural space. While a significant finding in trauma, it is statistically less common than isolated rib fractures. * **D. Aortic Rupture:** This is the most common cause of **immediate death** at the scene of high-velocity blunt trauma (e.g., deceleration injuries), but it is a relatively rare occurrence compared to the high incidence of rib fractures. **3. NEET-PG High-Yield Pearls:** * **Most common rib fractured:** 4th to 9th ribs. * **First and Second Rib Fractures:** Indicate high-energy trauma; always screen for associated injuries to the brachial plexus or subclavian vessels. * **Lower Rib Fractures (10th–12th):** High index of suspicion for **liver** (right side) or **spleen** (left side) injuries. * **Flail Chest:** Defined as $\geq$ 3 ribs fractured in $\geq$ 2 places; characterized by **paradoxical respiration**. * **Management:** The mainstay of treatment for simple rib fractures is **adequate analgesia** (to prevent splinting and subsequent pneumonia) and aggressive pulmonary toilet.

Question 574: A 70-year-old man presents after a motor vehicle accident with a fractured left rib and right femur. Abdominal CT reveals a left retroperitoneal hematoma adjacent to the left kidney, with no urine extravasation. How should this hematoma be managed?

A. Observation (Correct Answer)
B. Exploratory laparotomy through a midline incision
C. CT-guided aspiration
D. Surgical exploration through a left-flank retroperitoneal approach

Explanation: **Explanation:** The management of retroperitoneal hematomas (RPH) is determined by the mechanism of injury (blunt vs. penetrating) and the anatomical zone involved. This patient has a **Zone 2 retroperitoneal hematoma** (perinephric/flank) following blunt trauma. **1. Why Observation is Correct:** In blunt trauma, Zone 2 hematomas are managed **conservatively (observation)** if the patient is hemodynamically stable and there is no evidence of expanding hematoma or major renal pedicle injury. The CT scan confirms no urine extravasation (ruling out significant ureteral/pelvic injury) and the hematoma is contained. Most blunt renal injuries are Grade I-III and resolve without intervention. **2. Why Incorrect Options are Wrong:** * **B & D (Surgical Exploration):** In blunt trauma, Zone 2 hematomas are only explored if they are rapidly expanding, pulsatile, or associated with hemodynamic instability. Routine exploration often leads to unnecessary nephrectomies. Flank approaches (Option D) are generally avoided in trauma as they do not allow for full abdominal inspection. * **C (CT-guided aspiration):** This is not indicated in the acute setting. Aspiration carries a risk of introducing infection (converting a hematoma into an abscess) and does not address the underlying injury. **NEET-PG High-Yield Pearls:** * **Zone 1 (Central/Midline):** Contains the aorta and IVC. **Always explore** in both blunt and penetrating trauma. * **Zone 2 (Flank/Perinephric):** Contains kidneys and adrenals. Explore in **penetrating** trauma; **observe** in blunt trauma (unless unstable). * **Zone 3 (Pelvic):** Associated with pelvic fractures. **Never explore** (unless expanding); management involves pelvic binding or angioembolization. * **The "Mattox Maneuver":** Left-sided medial visceral rotation to expose Zone 1 and 2 structures.

Question 575: Blisters are classified as which type of burn?

A. Superficial first degree burn
B. Superficial second degree burn (Correct Answer)
C. Third degree burn
D. Deep first degree burn

Explanation: **Explanation:** The presence of **blisters** (bullae) is the hallmark clinical feature of a **Second-degree (Partial-thickness) burn**, specifically the **Superficial second-degree** type. 1. **Why Option B is correct:** In superficial second-degree burns, the injury extends through the epidermis into the papillary (superficial) dermis. The damage to the dermal-epidermal junction leads to local inflammatory exudate accumulation, which lifts the epidermis to form blisters. These burns are characteristically painful, blanch on pressure, and moist. 2. **Why other options are incorrect:** * **Option A & D:** First-degree burns (e.g., sunburn) involve only the epidermis. They present with erythema and pain but **no blisters**. (Note: "Deep first degree" is not a standard clinical classification). * **Option C:** Third-degree (Full-thickness) burns involve the entire dermis and underlying structures. They appear leathery, charred, or waxy white. Because the nerve endings are destroyed, they are **painless**, and because the skin is completely coagulated, they do **not** form blisters. **High-Yield Clinical Pearls for NEET-PG:** * **Deep Second-degree burns:** These involve the reticular (deep) dermis. They may have ruptured blisters, appear mottled white/pink, and have decreased sensation compared to superficial types. * **Rule of Nines:** Used for TBSA (Total Body Surface Area) calculation. Remember, first-degree burns are **excluded** from TBSA % calculations for fluid resuscitation. * **Parkland Formula:** $4 \text{ ml} \times \text{Body Weight (kg)} \times \% \text{ TBSA}$. Give half in the first 8 hours. * **Pain management:** Superficial second-degree burns are the most painful due to exposed sensory nerve endings.

Question 576: A patient developed haemoperitoneum following a Road Traffic Accident (RTA), with a blood pressure of 90/60 mmHg and a pulse of 140/min. Which of the following should be done?

A. Diagnostic Peritoneal Lavage (DPL) to be done
B. The liver is the most common organ to rupture
C. Ultrasound (USG) is better than CT Scan
D. Urgent surgery to be done (Correct Answer)

Explanation: ### Explanation The core principle in managing abdominal trauma is determining **hemodynamic stability**. This patient presents with signs of **Class III/IV hemorrhagic shock** (BP 90/60 mmHg, Pulse 140/min) and confirmed hemoperitoneum. **1. Why "Urgent surgery to be done" is correct:** In a patient with blunt or penetrating abdominal trauma who is **hemodynamically unstable**, the standard of care is an **Emergency Exploratory Laparotomy**. The goal is immediate hemorrhage control ("damage control surgery"). Imaging or invasive diagnostics only delay life-saving intervention in an unstable patient with a clear source of bleeding. **2. Analysis of Incorrect Options:** * **Option A (DPL):** While DPL is used in unstable patients when FAST is unavailable, it has largely been replaced by FAST. More importantly, since hemoperitoneum is already diagnosed and the patient is crashing, surgery takes precedence over further diagnostic procedures. * **Option B (Liver):** In blunt trauma (common in RTA), the **Spleen** is the most commonly injured organ. The liver is the second most common. (Note: In penetrating trauma, the small intestine is most common). * **Option C (USG vs. CT):** While FAST (USG) is faster, **CT Scan is the gold standard** for stable patients as it identifies the specific grade of injury and retroperitoneal bleeds. However, CT is contraindicated in unstable patients. **Clinical Pearls for NEET-PG:** * **Unstable + Positive FAST/Hemoperitoneum** = Laparotomy. * **Stable + Positive FAST** = Proceed to CT Scan to grade the injury. * **Kehr’s Sign:** Referred pain to the left shoulder (indicates splenic rupture/diaphragmatic irritation). * **Pringle Maneuver:** Used intraoperatively to control bleeding by compressing the hepatoduodenal ligament.

Question 577: What is the minimum amount of acute blood loss required to cause manifestations of shock?

A. 10-12%
B. 15-20%
C. 24-25%
D. 25-30% (Correct Answer)

Explanation: **Explanation:** The physiological response to hemorrhage is categorized by the **ATLS (Advanced Trauma Life Support) Classification of Hemorrhagic Shock**. This classification is based on the percentage of total blood volume lost and the resulting clinical manifestations. **1. Why 25-30% is correct:** In a healthy adult, the body’s compensatory mechanisms (such as tachycardia and peripheral vasoconstriction) are highly effective at maintaining blood pressure and organ perfusion during early blood loss. * **Class I Hemorrhage (<15%):** Minimal clinical signs; vitals remain normal. * **Class II Hemorrhage (15-30%):** This is the "Compensated" stage. While tachycardia and narrowed pulse pressure appear, the **classic manifestations of shock** (significant hypotension, marked tachypnea, and altered mental status) typically become clinically evident as the loss approaches the upper limit of this range and transitions into Class III. Most standard surgical textbooks (like Bailey & Love) and the ATLS guidelines indicate that significant physiological decompensation—the hallmark of clinical shock—requires a loss of **at least 25-30% (Class III)**. **2. Why other options are incorrect:** * **10-12% & 15-20%:** These represent Class I and early Class II hemorrhage. At this stage, the body compensates so well that blood pressure is maintained, and the patient may only show mild tachycardia. These do not constitute "manifest shock." * **24-25%:** While close, this is the threshold where compensation begins to fail. The most definitive manifestations (hypotension and oliguria) are more consistently associated with the 25-30% range. **High-Yield Clinical Pearls for NEET-PG:** * **Earliest sign of shock:** Tachycardia (except in patients on beta-blockers or with pacemakers). * **Earliest indicator of compensation:** Decrease in Pulse Pressure (due to rising diastolic pressure from vasoconstriction). * **Class III Shock (30-40% loss):** Marked by the onset of **Hypotension** and a significant drop in urine output (20-30 ml/hr). * **Class IV Shock (>40% loss):** Immediately life-threatening; characterized by anuria and lethargy.

Question 578: The clinical features of eye opening, best verbal response, and best motor response that result in a Glasgow Coma Scale score of 7 best fit which of the following descriptions?

A. Eye opening to pain, making incomprehensible sounds, and flexion as the best motor response. (Correct Answer)
B. Spontaneous eye opening, confused verbal response, and localizes to pain.
C. Eye opening to pain, confused verbal response, and localizes to pain.
D. No eye opening, incomprehensible sounds, and extension as the best motor response.

Explanation: ### Explanation The **Glasgow Coma Scale (GCS)** is a standardized tool used to assess the level of consciousness in trauma patients based on three parameters: Eye opening (E), Verbal response (V), and Motor response (M). The score ranges from 3 to 15. **1. Analysis of the Correct Option (A):** * **Eye opening to pain:** 2 points * **Incomprehensible sounds:** 2 points * **Flexion (Withdrawal) to pain:** 3 points * **Total:** 2 + 2 + 3 = **7** This matches the score requested in the question. **2. Analysis of Incorrect Options:** * **Option B:** Spontaneous eye opening (4), Confused (4), Localizes to pain (5). **Total = 13**. * **Option C:** Eye opening to pain (2), Confused (4), Localizes to pain (5). **Total = 11**. * **Option D:** No eye opening (1), Incomprehensible sounds (2), Extension (2). **Total = 5**. **3. High-Yield NEET-PG Clinical Pearls:** * **Head Injury Classification:** * **Mild:** GCS 13–15 * **Moderate:** GCS 9–12 * **Severe:** GCS 3–8 (A GCS of 8 or less usually indicates the need for **endotracheal intubation**). * **Motor Response (M):** This is the most significant prognostic indicator among the three components. * **Mnemonic for Motor (6 points):** **O**ld **L**adies **W**alking **F**ast **E**ating **N**othing (**O**bey-6, **L**ocalize-5, **W**ithdrawal-4, **F**lexion/Decorticate-3, **E**xtension/Decerebrate-2, **N**il-1). * **Note:** If a patient is intubated, the verbal score is recorded as "T" (e.g., GCS 7T). The minimum possible score is 3, never 0.

Question 579: A patient presents to the ER with massive hemorrhage. What is contraindicated?

A. Administering a massive transfusion fluid challenge
B. Administering 2L of IV crystalloid rapidly (Correct Answer)
C. Administering early tranexamic acid
D. Checking coagulation with thromboelastography, if available

Explanation: ### Explanation The management of massive hemorrhage has shifted from aggressive volume replacement to **Damage Control Resuscitation (DCR)**. **Why Option B is Correct:** Administering 2L of IV crystalloids rapidly is now **contraindicated** in massive hemorrhage. Large volumes of crystalloids lead to the **"Lethal Triad"** (Acidosis, Hypothermia, and Coagulopathy). Specifically, they cause **dilutional coagulopathy** by thinning out clotting factors and can dislodge newly formed "soft clots" by abruptly increasing blood pressure (the concept of "popping the clot"). Current ATLS 10th Edition guidelines recommend an initial bolus of only **1 Liter** of crystalloid, followed by early transition to blood products. **Analysis of Incorrect Options:** * **A. Massive Transfusion Fluid Challenge:** In exsanguinating patients, a massive transfusion protocol (MTP) using a 1:1:1 ratio of Plasma:Platelets:PRBCs is the gold standard to maintain perfusion without causing dilution. * **C. Early Tranexamic Acid (TXA):** Based on the CRASH-2 trial, TXA should be administered within **3 hours** of injury to reduce mortality by inhibiting fibrinolysis. * **D. Thromboelastography (TEG):** TEG or ROTEM provides a real-time assessment of the patient's coagulation status (viscoelastic testing), allowing for "goal-directed" rather than empirical transfusion. **High-Yield Clinical Pearls for NEET-PG:** * **Permissive Hypotension:** The goal in non-compressible hemorrhage is to maintain a Mean Arterial Pressure (MAP) of ~65 mmHg (or systolic BP of 80-90 mmHg) until surgical control is achieved. * **Lethal Triad:** Hypothermia + Coagulopathy + Metabolic Acidosis. * **1:1:1 Ratio:** Modern MTP aims to mimic whole blood. * **Hypocalcemia:** A common complication of massive transfusion due to citrate toxicity.

Question 580: Le Fort classification involves which bone fracture?

A. Maxilla (Correct Answer)
B. Mandible
C. Zygomatic arch
D. Nasal bone

Explanation: The **Le Fort classification** is the standard system used to categorize midface fractures. These fractures specifically involve the **maxilla** and its detachment from the cranial base. The classification is based on the "lines of weakness" in the midfacial skeleton. ### Why Maxilla is Correct: The Le Fort system describes three distinct patterns of maxillary fractures: * **Le Fort I (Guerin’s fracture):** A horizontal fracture separating the alveolar process and palate from the rest of the maxilla (Floating Palate). * **Le Fort II (Pyramidal fracture):** A triangular fracture involving the maxilla, nasal bones, and infraorbital rim. * **Le Fort III (Craniofacial dysjunction):** A complete separation of the midface from the skull base, involving the zygomatic arches and orbits (Floating Face). ### Why Other Options are Incorrect: * **Mandible:** Mandibular fractures are classified by anatomical location (symphysis, angle, condyle) but are never part of the Le Fort system. * **Zygomatic arch:** While the zygoma is involved in Le Fort III, a standalone zygomatic arch fracture is typically part of a **Tripod (Zygomaticomaxillary complex) fracture**, not a Le Fort fracture. * **Nasal bone:** These are the most common facial fractures but are classified separately unless they occur as a component of the Le Fort II or III complex. ### High-Yield Clinical Pearls for NEET-PG: 1. **Pterygoid Plates:** For a fracture to be classified as any Le Fort type, there **must** be a fracture of the **pterygoid plates** of the sphenoid bone. 2. **Clinical Sign:** "Dish-face deformity" is characteristic of Le Fort II and III due to the posterior displacement of the midface. 3. **Airway Management:** In severe midface trauma, avoid nasotracheal intubation or nasogastric tubes if a cribriform plate fracture (Le Fort III) is suspected to prevent intracranial entry. 4. **CSF Rhinorrhoea:** Most commonly associated with Le Fort II and III due to ethmoid bone involvement.

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