Trauma Practice Questions

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

Young patient. **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).

Q: Neurogenic shock is characterized by:

Hypotension and bradycardia. **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.

Q: A person has been brought to the casualty department following a road traffic accident. They experienced transient loss of consciousness, regained it briefly, and then became unconscious again. What is the most likely diagnosis?

Extradural hemorrhage. ### Explanation **Correct Answer: D. Extradural Hemorrhage (EDH)** The clinical scenario describes the classic **"Lucid Interval,"** which is the hallmark of an Extradural Hemorrhage. This occurs when a patient experiences an initial loss of consciousness (due to concussion), followed by a period of temporary recovery (the lucid interval), and then a rapid neurological deterioration as the expanding hematoma causes increased intracranial pressure and brain herniation. EDH is most commonly caused by a rupture of the **Middle Meningeal Artery** (a branch of the maxillary artery) following a fracture at the **pterion**, where the skull is thinnest. On a CT scan, it typically appears as a **biconvex (lentiform), hyperdense** lesion that does not cross cranial sutures. **Why the other options are incorrect:** * **Subdural Hemorrhage (SDH):** Usually results from the tearing of **bridging veins**. It presents with a more gradual decline in consciousness and appears as a **crescent-shaped** lesion on CT that *can* cross suture lines. * **Subarachnoid Hemorrhage (SAH):** Classically presents as a sudden, "thunderclap headache" (the worst headache of one's life), often due to a ruptured berry aneurysm rather than trauma. * **Intracerebral Hemorrhage:** Involves bleeding within the brain parenchyma itself, usually associated with chronic hypertension or shearing injuries (Diffuse Axonal Injury), rather than the specific "lucid interval" pattern. **NEET-PG High-Yield Pearls:** * **Source of Bleed:** Middle Meningeal Artery (most common). * **CT Appearance:** Convex/Lens-shaped (EDH) vs. Concave/Crescent-shaped (SDH). * **Surgical Management:** Urgent burr hole or craniotomy for evacuation if the hematoma is >30cm³ or the patient is symptomatic. * **The "Lucid Interval"** is pathognomonic for EDH but is only present in about 20-30% of cases.

Q: All of the following are causes of death in burn patients except?

Hyperkalemia. **Explanation:** In burn management, understanding the timeline of complications is crucial for NEET-PG. While electrolyte imbalances occur, **Hyperkalemia** is generally a transient finding rather than a primary cause of death. **Why Hyperkalemia is the correct answer:** Immediately following a major burn, cell lysis leads to a release of intracellular potassium, causing a transient rise. However, once fluid resuscitation begins, the combination of massive fluid shifts, renal clearance (if kidneys are functional), and the subsequent "diuretic phase" often leads to **Hypokalemia**. While severe hyperkalemia can cause arrhythmias, it is rarely the terminal event in burns compared to systemic failure or infection. **Analysis of Incorrect Options:** * **Shock (Hypovolemic):** This is the **most common cause of death in the first 48 hours** (Resuscitative phase). Increased capillary permeability leads to "Burn Shock." * **Sepsis:** This is the **most common cause of death overall** and the leading cause after the first 48–72 hours (Septic phase). *Pseudomonas aeruginosa* and *Staphylococcus aureus* are frequent culprits. * **ARDS:** Inhalation injury and systemic inflammatory response syndrome (SIRS) often lead to Acute Respiratory Distress Syndrome, a major contributor to mortality in the ICU setting. **High-Yield Clinical Pearls for NEET-PG:** * **Most common cause of death ( 48 hrs):** Sepsis/Multiorgan Failure. * **Fluid of Choice:** Ringer’s Lactate (Parkland Formula: 4ml × kg × %TBSA). * **Inhalation Injury:** Suspect if there are singed nasal hairs or carbonaceous sputum; it significantly increases the risk of ARDS and mortality. * **Curling’s Ulcer:** Acute stress ulcer in the stomach/duodenum associated with severe burns.

Q: A 20-year-old male patient presents following a road traffic accident with a pulse of 100/minute, BP of 100/70 mmHg, and a respiratory rate of 21/minute. Paradoxical chest movement is observed during respiration. What is the most likely diagnosis?

Flail chest. **Explanation:** The hallmark of this clinical presentation is **paradoxical chest movement**, which is the pathognomonic sign of **Flail Chest**. **1. Why Flail Chest is Correct:** Flail chest occurs when a segment of the thoracic cage loses bony continuity with the rest of the chest wall. This is defined anatomically as **fractures of 3 or more adjacent ribs in 2 or more places**. During inspiration, the negative intrathoracic pressure causes the detached (flail) segment to move inward, while during expiration, it moves outward—the opposite of normal chest wall mechanics. This "paradoxical" motion leads to ineffective ventilation and is often associated with underlying pulmonary contusion. **2. Why Other Options are Incorrect:** * **Tension Pneumothorax:** Presents with respiratory distress, tracheal deviation to the opposite side, absent breath sounds, and hemodynamic instability (obstructive shock). It does not cause paradoxical movement. * **Sucking Chest Wound (Open Pneumothorax):** Occurs due to a large defect in the chest wall. While it causes respiratory distress, the classic sign is air "hissing" through the wound, not paradoxical motion of a rib segment. * **Hemothorax:** Characterized by dullness on percussion and decreased breath sounds due to blood in the pleural cavity. It is a restrictive pathology without the specific segmental instability seen here. **Clinical Pearls for NEET-PG:** * **Management:** The primary goal is adequate oxygenation, humidified air, and **aggressive pain control** (often via epidural analgesia) to prevent splinting and atelectasis. * **Internal Stabilization:** Most cases are managed conservatively; however, mechanical ventilation provides "internal pneumatic stabilization" if respiratory failure develops. * **Associated Injury:** The most serious consequence of flail chest is not the rib fractures themselves, but the underlying **pulmonary contusion**.

Q: Subdural hematoma most commonly results from?

Injury to cortical bridging veins. **Explanation:** **Subdural Hematoma (SDH)** occurs due to the accumulation of blood in the potential space between the dura mater and the arachnoid mater. 1. **Why Option C is Correct:** The primary mechanism of SDH is the **tearing of cortical bridging veins** as they traverse the subdural space to drain into the dural venous sinuses (e.g., Superior Sagittal Sinus). These veins are particularly vulnerable to **shearing forces** during sudden acceleration-deceleration injuries. In elderly patients or those with chronic alcoholism, cerebral atrophy stretches these veins, making them susceptible to rupture even with minor trauma. 2. **Why Other Options are Incorrect:** * **Option A & B:** Rupture of an intracranial aneurysm or arteriovenous malformation (AVM) typically results in a **Subarachnoid Hemorrhage (SAH)**, characterized by blood in the CSF-filled space between the arachnoid and pia mater ("thunderclap headache"). * **Option D:** While hemophilia is a bleeding diathesis that can predispose a patient to intracranial bleeds, it is a systemic risk factor rather than the direct anatomical cause of the hematoma. **High-Yield Clinical Pearls for NEET-PG:** * **Radiology:** On CT, SDH appears as a **Crescent-shaped (concave)** hyperdensity that **can cross suture lines** (unlike Epidural Hematoma). * **Chronic SDH:** Common in elderly; presents with fluctuating levels of consciousness and progressive dementia-like symptoms weeks after minor trauma. * **Epidural Hematoma (EDH):** Usually due to injury to the **Middle Meningeal Artery**; characterized by a "Lucid Interval" and a biconvex (lens-shaped) appearance on CT. * **Management:** Surgical evacuation (Burr hole or Craniotomy) is indicated if there is a significant midline shift (>5mm) or neurological deterioration.

Q: Fracture at the angle of the mandible most commonly involves which tooth?

Third molars. **Explanation:** The **third molar (wisdom tooth)** is the correct answer due to the structural anatomy of the mandible. The angle of the mandible is a transition zone between the horizontal body and the vertical ramus. This area is inherently weakened by the presence of the third molar socket, especially if the tooth is **impacted**. An impacted third molar reduces the cross-sectional area of bone at the angle, creating a point of least resistance. Biomechanically, when a force is applied to the mandible, stress concentrates at this site, making it the most common location for fractures in the posterior mandible. **Analysis of Incorrect Options:** * **Second Premolar (A):** Fractures in this region are typically associated with the **mental foramen**, which is a weak point in the body of the mandible, but it is not the most common site compared to the angle. * **First Molar (B):** While the body of the mandible is a common site for fractures, the first molar region is structurally thicker and more robust than the angle containing a third molar. * **Incisors (C):** Fractures in the midline (symphysis) or parasymphysis are common in "guardsman fractures" (falls on the chin), but they do not occur at the angle. **Clinical Pearls for NEET-PG:** * **Most common site of Mandibular Fracture:** Condyle (overall), followed by the Angle and Symphysis. * **Weakest points of the Mandible:** Condylar neck, Angle (due to 3rd molars), and Mental foramen. * **Nerve Injury:** Angle fractures frequently involve the **Inferior Alveolar Nerve**, leading to paresthesia of the lower lip. * **Muscle Pull:** The displacement of angle fractures is determined by the pull of the masseter, medial pterygoid, and temporal muscles (classified as "favorable" or "unfavorable" fractures).

Question 1

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

Accepted Answer

Young patient

Answer

Hemodynamically unstable patient

Answer

Shattered spleen

Answer

Extreme pallor and hypotension

Question 2

Neurogenic shock is characterized by:

Accepted Answer

Hypotension and bradycardia

Answer

Hypertension and tachycardia

Answer

Hypertension and bradycardia

Answer

Hypotension and tachycardia

Question 3

A person has been brought to the casualty department following a road traffic accident. They experienced transient loss of consciousness, regained it briefly, and then became unconscious again. What is the most likely diagnosis?

Accepted Answer

Extradural hemorrhage

Answer

Intracerebral hemorrhage

Answer

Subarachnoid hemorrhage

Answer

Subdural hemorrhage

Question 4

All of the following are causes of death in burn patients except?

Accepted Answer

Hyperkalemia

Answer

ARDS

Answer

Shock

Answer

Sepsis

Question 5

In second-degree burns, re-epithelialization typically occurs around which time frame?

Accepted Answer

2 weeks

Answer

1 week

Answer

3 weeks

Answer

4 weeks

Question 6

Regarding high-voltage electrical burns to an extremity, what is indicated?

Accepted Answer

Evaluation for fracture of the other extremities and visceral injury is indicated

Answer

Injuries are generally more superficial than those of thermal burns

Answer

Intravenous fluid replacement is based on the percentage of body surface area burned

Answer

Antibiotic prophylaxis is not required

Question 7

A 20-year-old male patient presents following a road traffic accident with a pulse of 100/minute, BP of 100/70 mmHg, and a respiratory rate of 21/minute. Paradoxical chest movement is observed during respiration. What is the most likely diagnosis?

Accepted Answer

Flail chest

Answer

Tension pneumothorax

Answer

Sucking chest wound

Answer

Hemothorax

Question 8

Subdural hematoma most commonly results from?

Accepted Answer

Injury to cortical bridging veins

Answer

Rupture of intracranial aneurysm

Answer

Rupture of cerebral arteriovenous malformation

Answer

Hemophilia

Question 9

When is emergency endotracheal intubation indicated?

Accepted Answer

Glasgow Coma Scale (GCS) less than 7

Answer

Tension pneumothorax

Answer

Cardiac tamponade

Answer

Bleeding gastric ulcer

Question 10

Fracture at the angle of the mandible most commonly involves which tooth?

Accepted Answer

Third molars

Answer

Second premolar

Answer

First molar

Answer

Incisor

Trauma — MCQs

Trauma — MCQs

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