Trauma — MCQs

Trauma Indian Medical PG Practice Questions and MCQs

Question 531: Which of the following medications is used in trauma patients to control bleeding?

A. Tranexamic acid (Correct Answer)
B. Haemocoagulase
C. Aprotinin
D. Fondaparinux

Explanation: ### Explanation **Correct Answer: A. Tranexamic acid (TXA)** **Mechanism and Rationale:** In major trauma, the body often undergoes **hyperfibrinolysis**—a state where clots are broken down prematurely, leading to exsanguination. Tranexamic acid is an **antifibrinolytic** agent that works by competitively inhibiting the activation of plasminogen to plasmin. By blocking the lysine-binding sites on plasminogen, it prevents the degradation of fibrin, thereby stabilizing formed clots and reducing blood loss. **Analysis of Incorrect Options:** * **B. Haemocoagulase:** This is a mixture of enzymes (isolated from snake venom) used topically or in minor surgical oozing. It lacks robust clinical evidence for improving mortality in major polytrauma. * **C. Aprotinin:** A broad-spectrum serine protease inhibitor once used to reduce bleeding in cardiac surgery. It was largely withdrawn from the market due to concerns regarding increased risks of renal failure and mortality, and it is not the standard of care in trauma. * **D. Fondaparinux:** This is a synthetic **anticoagulant** (Factor Xa inhibitor). It is used for thromboprophylaxis or treating DVT/PE; administering it to a bleeding trauma patient would be contraindicated as it would worsen hemorrhage. **High-Yield Clinical Pearls for NEET-PG:** * **CRASH-2 Trial:** This landmark study established that TXA reduces mortality in trauma patients if administered within **3 hours** of injury. * **The "Golden 3 Hours":** Administration after 3 hours may actually increase the risk of death due to thrombotic complications or altered inflammatory responses. * **Dosing:** The standard protocol is a **1g loading dose** over 10 minutes, followed by a **1g maintenance infusion** over 8 hours. * **Indication:** Systolic BP <90 mmHg or heart rate >110 bpm (signs of hemorrhagic shock).

Question 532: In the ATLS 'AMPLE' history mnemonic, what does the letter 'L' stand for?

A. Last meal (Correct Answer)
B. Latest events
C. Loss of consciousness
D. Location of the event

Explanation: In the management of trauma patients, the **AMPLE** history is a focused, secondary survey tool used to gather essential clinical information quickly. ### **Explanation of the Correct Answer** The letter **'L'** stands for **Last Meal** (or Last oral intake). This is critical in trauma management because it helps the surgical and anesthesia teams assess the **risk of aspiration**. If a patient requires emergency surgery, knowing the time of the last meal determines the necessity of a Rapid Sequence Induction (RSI) and the potential for gastric decompression via a nasogastric tube to prevent Mendelson’s syndrome (aspiration pneumonitis). ### **Analysis of Incorrect Options** * **B. Latest events:** While the events leading up to the trauma are important, they are represented by the letter **'E'** (Events/Environment related to the injury). * **C. Loss of consciousness:** This is assessed during the Primary Survey under **'D'** (Disability) using the GCS or AVPU scale, not the AMPLE history. * **D. Location of the event:** While relevant for mechanism of injury, it is not a specific component of this mnemonic. ### **Clinical Pearls for NEET-PG** The full **AMPLE** mnemonic is: * **A:** Allergies * **M:** Medications (especially anticoagulants like Warfarin or Clopidogrel) * **P:** Past medical history / Pregnancy * **L:** Last meal (Time of intake) * **E:** Events / Environment (Mechanism of injury) **High-Yield Note:** In trauma, every patient is traditionally considered to have a **"Full Stomach"** regardless of the 'L' history, necessitating precautions during intubation. However, the 'L' provides a baseline for the severity of that risk.

Question 533: What is the first investigation of choice in a patient presenting with blunt trauma to the abdomen in the emergency room?

A. CT scan
B. MRI
C. X-ray abdomen
D. FAST scan (Correct Answer)

Explanation: **Explanation:** In the emergency management of blunt trauma abdomen (BTA), the primary goal is the rapid identification of life-threatening internal hemorrhage. **1. Why FAST scan is the correct answer:** **FAST (Focused Assessment with Sonography for Trauma)** is the investigation of choice in the emergency room because it is **rapid, non-invasive, bedside, and repeatable**. It is specifically designed to detect free intraperitoneal fluid (hemoperitoneum) in four areas: the Hepatorenal pouch (Morison’s pouch), Splenorenal space, Pelvis (Pouch of Douglas), and the Pericardium. Its high sensitivity in detecting as little as 100-200 ml of fluid makes it the gold standard for initial screening, especially in hemodynamically unstable patients. **2. Why other options are incorrect:** * **CT Scan:** While the "Gold Standard" for identifying specific organ injuries (e.g., Grade III splenic tear), it requires the patient to be **hemodynamically stable**. It is time-consuming and requires transporting the patient away from the resuscitation bay. * **MRI:** It has no role in acute trauma management due to long scan times and incompatibility with resuscitation equipment. * **X-ray Abdomen:** It is insensitive for detecting hemoperitoneum or solid organ injury. Its primary use is limited to detecting pneumoperitoneum (hollow viscus perforation), but it is not the *first* investigation. **Clinical Pearls for NEET-PG:** * **E-FAST:** An "Extended" FAST includes views of the thorax to rule out PTX (Pneumothorax) and Hemothorax. * **Hemodynamically Unstable + Positive FAST** = Immediate Laparotomy. * **Hemodynamically Stable + Positive FAST** = Proceed to CECT Abdomen to grade the injury. * **DPL (Diagnostic Peritoneal Lavage):** Used if FAST is unavailable or inconclusive in an unstable patient; however, it is invasive and less preferred today.

Question 534: A middle third facial fracture (Le Fort fracture) is characterized by all of the following EXCEPT:

A. Proptosis (Correct Answer)
B. Lengthening of the face
C. Enophthalmos
D. Ecchymosis

Explanation: **Explanation:** Le Fort fractures involve the separation of the midface from the skull base. The correct answer is **Proptosis** because Le Fort fractures typically result in **Enophthalmos** (recession of the eyeball), not proptosis (protrusion). **Why Proptosis is the Correct Answer (The "Except"):** In midface trauma, the orbital floor or walls are often fractured, leading to an increase in orbital volume. This causes the orbital contents (fat and globe) to sag or herniate into the maxillary sinus, resulting in **Enophthalmos**. Proptosis is more characteristic of retrobulbar hemorrhage or orbital tumors, which increase pressure behind the globe. **Analysis of Other Options:** * **Lengthening of the face:** This is a hallmark of Le Fort II and III fractures. The separation of the midfacial skeleton from the cranium causes the facial bones to displace downwards and backwards due to gravity and the pull of the pterygoid muscles. * **Enophthalmos:** As explained, the disruption of the orbital integrity leads to a "sunken" appearance of the eye. * **Ecchymosis:** Extensive bruising is universal in facial fractures. Specifically, **"Panda eyes"** (periorbital ecchymosis) are common in Le Fort II and III fractures. **High-Yield Clinical Pearls for NEET-PG:** * **Le Fort I (Guerin’s fracture):** Low level; separates the alveolar process from the maxilla ("Floating palate"). * **Le Fort II (Pyramidal):** Involves the nasal bones and infraorbital rim. * **Le Fort III (Craniofacial dysjunction):** The entire midface is separated from the skull base; involves the zygomatic arch. * **Dish-face deformity:** A classic description of the flattened, lengthened facial profile seen in Le Fort II and III fractures. * **CSF Rhinorrhea:** Most common in Le Fort II and III due to cribriform plate involvement.

Question 535: What is the first step in the management of blunt abdominal trauma?

A. Diagnostic peritoneal lavage (DPL)
B. Contrast-enhanced computed tomography (CECT)
C. X-ray abdomen erect
D. Focused assessment with sonography for trauma (FAST) (Correct Answer)

Explanation: **Explanation:** The management of blunt abdominal trauma (BAT) follows the **ATLS (Advanced Trauma Life Support)** protocol. Once the primary survey (ABCDE) is initiated, the immediate goal is to identify life-threatening intra-abdominal hemorrhage. **Why FAST is the Correct Answer:** **Focused Assessment with Sonography for Trauma (FAST)** is the initial investigation of choice because it is rapid, non-invasive, bedside, and repeatable. It specifically looks for free fluid (blood) in four dependent areas: the Morison pouch (RUQ), perisplenic space (LUQ), pelvis, and pericardium. In a hemodynamically unstable patient, a positive FAST indicates the need for immediate laparotomy. **Analysis of Incorrect Options:** * **Diagnostic Peritoneal Lavage (DPL):** While highly sensitive for detecting blood, it is invasive and has been largely replaced by FAST. It is now reserved for cases where FAST is inconclusive or unavailable in hemodynamically unstable patients. * **Contrast-Enhanced CT (CECT):** This is the **gold standard** for identifying the specific organ injury and grading its severity. However, it is only performed in **hemodynamically stable** patients because it requires transporting the patient away from the resuscitation area. * **X-ray Abdomen Erect:** This has limited utility in acute trauma. While it may show pneumoperitoneum (hollow viscus perforation), it cannot detect hemoperitoneum and delays definitive management. **High-Yield Clinical Pearls for NEET-PG:** * **Hemodynamically Unstable + Positive FAST:** Proceed to Emergency Laparotomy. * **Hemodynamically Stable + Positive FAST:** Proceed to CECT to grade the injury. * **E-FAST:** An "Extended" FAST includes views of the thorax to rule out PTX (Pneumothorax) and Hemothorax. * **Most common organ injured in BAT:** Spleen (followed by Liver).

Question 536: Craniofacial dissociation is seen in which type of fracture?

A. Le Fort 1 fracture
B. Le Fort 2 fracture
C. Le Fort 3 fracture (Correct Answer)
D. Tripod fracture

Explanation: **Explanation:** **Le Fort III fracture**, also known as **Craniofacial Dissociation**, is the correct answer because it involves a complete separation of the facial skeleton from the cranial base. The fracture line passes through the nasofrontal suture, the maxillofrontal suture, the orbital floor, and the zygomaticofrontal suture, extending through the zygomatic arches. This results in the entire midface becoming mobile and "detached" from the skull. **Analysis of Incorrect Options:** * **Le Fort I (Guerin’s fracture):** This is a horizontal maxillary fracture above the level of the teeth. It results in a **"floating palate"** but does not involve the orbits or the cranial base. * **Le Fort II (Pyramidal fracture):** This fracture has a triangular shape, involving the nasal bones and the infraorbital rim. It results in a **"floating maxilla"** but the zygomatic bones remain attached to the cranium. * **Tripod Fracture (Zygomaticomaxillary Complex Fracture):** This involves three points of the zygoma (frontal, maxillary, and temporal processes). While it causes significant malar flattening, it is a localized lateral midface injury and does not cause global dissociation of the face from the skull. **High-Yield Clinical Pearls for NEET-PG:** * **Le Fort III** is frequently associated with **CSF rhinorrhea** due to involvement of the ethmoid bone and cribriform plate. * **Dish-face deformity:** A classic clinical sign of Le Fort II and III fractures where the midface appears sunken or concave. * **Lengthening of the face:** Often seen in Le Fort II and III due to the downward displacement of the fractured segments. * **Pterygoid plates:** Involvement of the pterygoid plates is a mandatory feature for a fracture to be classified as any Le Fort type (I, II, or III).

Question 537: In splenic injury, conservation management is indicated in which of the following scenarios?

A. Hemodynamically unstable patient
B. Young patient (Correct Answer)
C. Shattered spleen
D. Extreme pallor and hypotension

Explanation: **Explanation:** Splenic conservation (Non-Operative Management or NOM) is the current gold standard for hemodynamically stable patients with blunt splenic trauma. **Why "Young patient" is correct:** Age is a significant factor in the success of conservative management. Children and young adults have a more robust splenic capsule and more efficient intraparenchymal vessel contraction compared to the elderly. In pediatric populations, the success rate of NOM exceeds 90%. Preserving the spleen in young patients is prioritized to avoid **Overwhelming Post-Splenectomy Infection (OPSI)**, a life-threatening risk caused by encapsulated organisms (e.g., *S. pneumoniae*). **Why other options are incorrect:** * **A & D (Hemodynamically unstable/Hypotension):** Hemodynamic instability is the **absolute contraindication** to conservative management. Patients with persistent hypotension, tachycardia, or extreme pallor despite fluid resuscitation require immediate laparotomy. * **C (Shattered spleen):** A "shattered spleen" (Grade V injury) involves complete devascularization or maceration. These high-grade injuries usually lead to massive hemoperitoneum and instability, typically necessitating a splenectomy rather than conservation. **High-Yield Clinical Pearls for NEET-PG:** * **Most common organ injured** in blunt trauma abdomen: Spleen. * **Prerequisite for NOM:** Hemodynamic stability and absence of other hollow viscus injuries requiring surgery. * **Investigation of Choice:** CECT Abdomen (to grade the injury and check for "contrast blush"). * **Kehr’s Sign:** Referred pain to the left shoulder due to diaphragmatic irritation (classic for splenic rupture). * **Vaccination:** If splenectomy is performed, vaccinate against *S. pneumoniae, H. influenzae,* and *N. meningitidis* (ideally 14 days post-op).

Question 538: Neurogenic shock is characterized by:

A. Hypertension and tachycardia
B. Hypertension and bradycardia
C. Hypotension and tachycardia
D. Hypotension and bradycardia (Correct Answer)

Explanation: **Explanation:** Neurogenic shock occurs due to the loss of sympathetic vascular tone and the loss of compensatory autonomic responses, typically following a high spinal cord injury (above T6). **1. Why Option D is Correct:** The pathophysiology involves a "double hit" to the autonomic nervous system: * **Hypotension:** Loss of sympathetic outflow leads to massive peripheral vasodilation and decreased systemic vascular resistance (SVR), causing blood to pool in the extremities. * **Bradycardia:** The sympathetic fibers to the heart (T1–T4) are disrupted, leaving the **vagal (parasympathetic) tone unopposed**. Unlike other forms of shock where the heart rate rises to compensate for low blood pressure, in neurogenic shock, the heart cannot mount a tachycardic response. **2. Why Other Options are Incorrect:** * **Options A & B:** Hypertension is not a feature of any distributive shock. While a brief hypertensive surge can occur at the moment of injury (autonomic dysreflexia in later stages), the hallmark of the *shock phase* is hypotension. * **Option C:** Hypotension and tachycardia are the classic signs of **Hypovolemic Shock**. In trauma, if a patient has hypotension and tachycardia, you must rule out hemorrhage first. **3. Clinical Pearls for NEET-PG:** * **The "Warm Shock":** Unlike hypovolemic shock (cold/clammy skin), neurogenic shock presents with **warm, dry skin** due to vasodilation. * **Level of Injury:** Usually seen in cervical or high thoracic cord injuries (above T6). * **Management:** Initial treatment involves aggressive fluid resuscitation followed by vasopressors (e.g., Norepinephrine or Phenylephrine) and sometimes Atropine for severe bradycardia. * **Spinal vs. Neurogenic Shock:** Do not confuse the two. Spinal shock refers to the loss of *reflexes* and flaccidity after injury, while neurogenic shock refers to the *hemodynamic* instability.

Question 539: Which of the following can cause complications with treatment of mandibular fracture?

A. Miniplate
B. Intermaxillary fixation (IMF)
C. Reconstruction plate
D. Compression plate (Correct Answer)

Explanation: **Explanation:** The correct answer is **Compression plate**. In mandibular fractures, the primary goal of fixation is to achieve absolute stability. However, **compression plates** (specifically dynamic compression plates or DCPs) are associated with a higher rate of complications in the mandible compared to other methods. The underlying mechanism involves the application of excessive axial pressure across the fracture line. While this promotes primary bone healing, it can lead to **lingual splaying** (the fracture gap opening on the inner side) and **malocclusion** if not perfectly contoured. Furthermore, the excessive pressure can cause pressure necrosis of the bone or damage to the dental roots and the inferior alveolar nerve. **Analysis of other options:** * **Miniplates (A):** These are currently the "Gold Standard" (Champy’s technique). They are non-compression plates applied along the "lines of ideal osteosynthesis." They are easy to contour and have a low complication rate. * **Intermaxillary Fixation (IMF) (B):** This is a traditional conservative method using wires to lock the jaws. While uncomfortable for the patient, it is a standard treatment and not inherently a cause of surgical plating complications. * **Reconstruction Plates (C):** These are thick, load-bearing plates used for comminuted fractures or continuity defects. They are highly stable and designed to bear the full force of mastication, making them safer for complex injuries than standard compression plates. **High-Yield Clinical Pearls for NEET-PG:** * **Champy’s Principle:** Uses miniplates at the superior border (tension zone) of the mandible to neutralize distracting forces. * **Weakest part of the mandible:** The **Condyle** (most common site of fracture), followed by the angle and symphysis. * **Nerve at risk:** The **Inferior Alveolar Nerve** is most commonly involved in body and angle fractures. * **Guérin’s Sign:** Ecchymosis in the region of the greater palatine artery (seen in Le Fort I fractures, not mandibular).

Question 540: What is the most likely cause of excessive bleeding during hemothorax?

A. Venacava
B. Hepatic artery
C. Internal mammary artery
D. Major artery (Correct Answer)

Explanation: ### Explanation **1. Why "Major Artery" is the Correct Answer:** In the context of a hemothorax, bleeding typically arises from either the low-pressure pulmonary vasculature or the high-pressure systemic vasculature [1]. While most hemothoraces are self-limiting (due to the low pressure of the pulmonary circuit), **excessive or massive bleeding** is almost always arterial in origin. Specifically, injury to high-pressure systemic vessels like the **Intercostal arteries** or the **Internal Mammary artery** (which are branches of "major" systemic arteries) leads to rapid accumulation of blood. In the context of this specific question, "Major artery" serves as the umbrella term for high-pressure vessels (like the Aorta or its primary branches) that necessitate surgical intervention (Thoracotomy) [2]. **2. Why the Other Options are Incorrect:** * **Vena Cava (A):** While injury to the Vena Cava causes catastrophic bleeding, it is less common in isolated hemothorax and often associated with immediate mortality or cardiac tamponade if the intrapericardial segment is involved. * **Hepatic Artery (B):** This is an intra-abdominal vessel. While a thoraco-abdominal injury can involve the liver, the primary cause of a standard hemothorax is thoracic, not abdominal, vasculature. * **Internal Mammary Artery (C):** This is a *specific* cause of significant bleeding. However, "Major artery" is the broader, more definitive category in standardized testing when referring to the source of high-volume, high-pressure hemorrhage compared to venous or pulmonary sources. **3. Clinical Pearls for NEET-PG:** * **Definition of Massive Hemothorax:** Initial drainage of **>1500 ml** of blood or a drainage rate of **200 ml/hour for 2–4 hours**. * **Indication for Emergency Thoracotomy:** Massive hemothorax is the primary indication [2]. * **Most common source of minor hemothorax:** Laceration of the lung parenchyma (low pressure, often stops spontaneously). * **Most common source of persistent/massive hemothorax:** Intercostal artery or Internal mammary artery.

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Trauma — MCQs

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