Trauma — MCQs

Trauma Indian Medical PG Practice Questions and MCQs

Question 101: In a patient with a head injury, which of the following is most important to assess first?

A. Pupillary light reflex
B. Pupillary size
C. Corneal reflex
D. Ability to open eyes (Correct Answer)

Explanation: In the initial assessment of a head injury patient, the **Glasgow Coma Scale (GCS)** is the gold standard for evaluating the level of consciousness. The GCS consists of three components: Eye opening (E), Verbal response (V), and Motor response (M). **Why "Ability to open eyes" is the correct answer:** The ability to open eyes is the **first component** of the GCS assessment. It provides an immediate indication of the functioning of the reticular activating system in the brainstem and the cortex. In trauma protocols (ATLS), assessing the GCS (starting with eye-opening) is a priority under the "D" (Disability/Neurological status) of the Primary Survey. It is a more sensitive and earlier indicator of neurological decline than brainstem reflexes. **Explanation of Incorrect Options:** * **Pupillary light reflex & Pupillary size (Options A & B):** While vital, these are part of the pupillary examination used to detect signs of herniation (e.g., a blown pupil in uncal herniation). They are assessed *after* or alongside the GCS, not as the very first step. * **Corneal reflex (Option C):** This is a brainstem reflex (Cranial Nerves V and VII). It is typically assessed in deeply comatose patients to determine the depth of the coma or brain death, rather than as an initial screening tool in acute trauma. **High-Yield Clinical Pearls for NEET-PG:** * **GCS Scoring:** Eye opening is scored from 1 to 4. (4: Spontaneous, 3: To speech, 2: To pain, 1: None). * **Minimum/Maximum Score:** The lowest GCS score is 3 (not 0), and the maximum is 15. * **Intubation Threshold:** A GCS score of **8 or less** is an indication for endotracheal intubation ("GCS less than 8, intubate"). * **Motor Response:** The Motor component (M) is the most significant predictor of overall prognosis.

Question 102: What is the best tool for monitoring fluid resuscitation in trauma patients?

A. Urine output (Correct Answer)
B. Central venous pressure
C. Blood pressure
D. SpO2

Explanation: **Explanation:** In the management of trauma and hemorrhagic shock, the primary goal of fluid resuscitation is to restore **end-organ perfusion**. **Why Urine Output (UO) is the best tool:** Urine output is considered the most reliable non-invasive indicator of visceral (organ) perfusion. The kidneys are highly sensitive to changes in cardiac output and blood volume; a decrease in renal blood flow leads to a rapid drop in glomerular filtration. Maintaining a UO of **0.5 mL/kg/hr in adults** (and 1 mL/kg/hr in children) confirms that the kidneys—and by extension, other vital organs—are being adequately perfused. **Why other options are incorrect:** * **Central Venous Pressure (CVP):** While it measures right atrial pressure, it is a poor indicator of fluid responsiveness. It can be influenced by factors like mechanical ventilation, cardiac tamponade, or tension pneumothorax, making it unreliable in acute trauma. * **Blood Pressure (BP):** BP is a lagging indicator. Due to compensatory mechanisms (tachycardia and peripheral vasoconstriction), BP may remain normal even after a 15–30% loss of blood volume (Class I and II shock). Therefore, "normal" BP does not guarantee adequate tissue perfusion. * **SpO2:** This measures arterial oxygen saturation, not volume status or tissue perfusion. **High-Yield Clinical Pearls for NEET-PG:** * **Target UO:** 0.5 mL/kg/hr (Adults); 1 mL/kg/hr (Children); 2 mL/kg/hr (Infants). * **Best Metabolic Marker:** Serum Lactate or Base Deficit (these reflect the severity of tissue hypoxia and are used to monitor "clearance" during resuscitation). * **Golden Rule:** In trauma, the first sign of compensation for hypovolemia is **tachycardia**, but the most sensitive indicator of adequate resuscitation is **urine output**.

Question 103: What is considered a secondary brain injury?

A. Concussion
B. Diffuse axonal injury
C. Depressed skull fracture
D. Intracerebral hematoma (Correct Answer)

Explanation: ### Explanation In traumatic brain injury (TBI), brain damage is categorized into two distinct phases: **Primary** and **Secondary** injury. **1. Why Intracerebral Hematoma is the Correct Answer:** Secondary brain injury refers to the physiological and metabolic changes that occur **after** the initial impact. While the impact itself may cause a vessel to rupture, the "injury" in a clinical sense refers to the subsequent expansion of the hematoma, leading to increased intracranial pressure (ICP), cerebral edema, ischemia, and biochemical cascades (like glutamate excitotoxicity). Among the options provided, an **intracerebral hematoma** is a dynamic process that evolves over hours or days, contributing to secondary neurological deterioration. **2. Analysis of Incorrect Options:** * **A. Concussion:** This is a **primary injury**. It is a functional disturbance caused by the direct mechanical force at the moment of impact. * **B. Diffuse Axonal Injury (DAI):** This is a **primary injury** resulting from shearing forces (acceleration/deceleration) that occur at the instant of trauma, leading to widespread axonal stretching or tearing. * **C. Depressed Skull Fracture:** This is a **primary injury**. It is a structural mechanical deformity occurring at the exact moment of the traumatic event. **3. Clinical Pearls for NEET-PG:** * **Primary Injury:** Occurs at T = 0. Includes contusions, lacerations, DAI, and skull fractures. It is best managed by **prevention** (e.g., helmets, seatbelts). * **Secondary Injury:** Occurs minutes to days later. Major causes include **Hypoxia (PaO₂ < 60 mmHg)** and **Hypotension (SBP < 90 mmHg)**. * **The "Golden Rule" of TBI Management:** The primary goal in the Emergency Department is to prevent secondary brain injury by maintaining adequate oxygenation and cerebral perfusion pressure (CPP). * **Cushing’s Triad (Sign of increased ICP):** Hypertension, Bradycardia, and Irregular Respiration.

Question 104: In a patient with multiple injuries, what is the first priority?

A. Patency of airway (Correct Answer)
B. Maintenance of blood pressure
C. Immobilization of the cervical spine
D. Lateral position with mouth exhalation

Explanation: **Explanation:** In the management of a trauma patient, the standard protocol follows the **ATLS (Advanced Trauma Life Support)** guidelines, which prioritize life-threatening conditions in a specific sequence: **ABCDE**. **1. Why "Patency of airway" is correct:** The airway is the first priority (A) because hypoxia can lead to irreversible brain damage or death within minutes. Without a patent airway, subsequent interventions like ventilation or circulatory support are futile. In trauma, the airway can be obstructed by the tongue, blood, vomitus, or maxillofacial fractures; thus, ensuring patency is the absolute first step. **2. Analysis of incorrect options:** * **Maintenance of blood pressure (B):** This falls under "Circulation" (C). While critical, it follows Airway and Breathing. You cannot circulate oxygenated blood if the airway is blocked. * **Immobilization of the cervical spine (C):** While ATLS dictates "Airway maintenance with restriction of cervical spine motion," the *primary* goal is the airway itself. Cervical stabilization is a concurrent maneuver performed *during* airway management, not a priority that supersedes it. * **Lateral position (D):** This is part of the "recovery position" used in basic first aid for unconscious patients to prevent aspiration, but it is not the standard priority in a hospital trauma setting where the spine must be protected and definitive airway control (like intubation) may be needed. **Clinical Pearls for NEET-PG:** * **The Golden Hour:** The first 60 minutes after trauma where prompt intervention significantly reduces mortality. * **Vocalizing:** If a trauma patient can speak clearly, the airway is likely patent (at least temporarily). * **Cervical Spine:** Always assume a cervical spine injury in any patient with blunt trauma above the clavicle. * **Sequence:** Airway (A) → Breathing (B) → Circulation (C) → Disability (D) → Exposure (E).

Question 105: Which of the following statements are true about Flail chest?

A. 3, 4, 5 are true and 1, 2 are false
B. 3, 4, 5 are false and 1, 2 are true
C. 1, 4, 5 are true and 2, 3 are false (Correct Answer)
D. 1, 2, 4 are false and 3, 5 are true

Explanation: **Flail Chest: Clinical Explanation** Flail chest is a clinical diagnosis defined by the fracture of **two or more adjacent ribs in two or more places**, creating a free-floating segment of the chest wall. ### **Analysis of Statements** 1. **Paradoxical Respiration (True):** This is the hallmark of flail chest. During inspiration, the negative intrathoracic pressure sucks the flail segment inward; during expiration, it is pushed outward. 2. **Underlying Lung Contusion (True/Crucial):** While the question marks this as "false" in the context of the specific option provided, clinically, the **primary cause of hypoxia** in flail chest is the underlying pulmonary contusion, not just the mechanical rib movement. 3. **Management (Pain Control & Oxygen):** The mainstay of treatment is adequate analgesia (often epidural) and aggressive pulmonary toilet. **Mechanical ventilation** is reserved for patients with respiratory failure, not every case. 4. **Internal Pneumatic Stabilization:** This refers to the use of positive pressure ventilation to "push" the flail segment out from the inside, stabilizing the chest wall. 5. **Surgical Fixation:** Indicated for patients who cannot be weaned from the ventilator, have severe chest wall deformity, or are undergoing thoracotomy for other reasons. ### **Why Option C is Correct** Option C identifies statements 1, 4, and 5 as true. These represent the classic clinical sign (paradoxical breathing), the physiological stabilization method (pneumatic stabilization), and the definitive surgical intervention. ### **High-Yield NEET-PG Pearls** * **Most common cause of hypoxia:** Underlying pulmonary contusion (V/Q mismatch). * **Initial Management:** Humidified oxygen and judicious fluid resuscitation (avoiding fluid overload which worsens contusion). * **Pain Management:** Intercostal nerve blocks or thoracic epidural are superior to systemic opioids as they do not depress the respiratory drive. * **Diagnosis:** Primarily clinical (visualizing paradoxical movement), though CXR/CT confirms rib fractures.

Question 106: A patient with burns should be administered which of the following?

A. 5% dextrose
B. Hypertonic saline 0.9%
C. Dextrose saline
D. Human albumin 4.5% (Correct Answer)

Explanation: **Explanation:** In the management of major burns, fluid resuscitation is critical to counteract the massive shift of fluid from the intravascular to the interstitial space (burn shock). While crystalloids (like Ringer’s Lactate) are the mainstay of the initial 24 hours (Parkland formula), the use of **colloids** becomes essential in the subsequent phase. **Why Human Albumin 4.5% is the Correct Answer:** After the first 8–24 hours post-burn, capillary permeability begins to normalize. At this stage, administering **Human Albumin (a colloid)** is indicated to increase the plasma oncotic pressure. This helps "pull" fluid back into the intravascular compartment, reducing tissue edema and maintaining hemodynamic stability with lower total fluid volumes compared to crystalloids alone. In many modern protocols and exam-based scenarios, albumin is the preferred choice for protein replacement and volume expansion in severe burns. **Analysis of Incorrect Options:** * **A & C (5% Dextrose / Dextrose Saline):** These are hypotonic or maintenance fluids. In the acute phase of burns, they rapidly leave the intravascular space, worsening interstitial edema and failing to support blood pressure. * **B (Hypertonic Saline 0.9%):** Note that 0.9% Saline is actually **Isotonic**, not hypertonic. While used in some protocols, it lacks the oncotic pressure provided by albumin and can lead to hyperchloremic acidosis if used in large volumes. **High-Yield Clinical Pearls for NEET-PG:** * **Parkland Formula:** $4 \text{ ml} \times \text{Body Weight (kg)} \times \% \text{ TBSA}$. Give half in the first 8 hours. * **Fluid of Choice (First 24h):** Ringer’s Lactate (Isotonic crystalloid). * **Best Indicator of Resuscitation:** Urine output ($0.5\text{--}1.0 \text{ ml/kg/hr}$ in adults; $1.0 \text{ ml/kg/hr}$ in children). * **Colloid Timing:** Usually introduced after 18–24 hours when capillary leak diminishes.

Question 107: Hemopericardium is seen in which of the following conditions?

A. Chest injury
B. Myocardial infarction (MI)
C. Ruptured aortic aneurysm
D. All of the above (Correct Answer)

Explanation: **Explanation:** Hemopericardium refers to the accumulation of blood within the pericardial sac. Because the fibrous pericardium is relatively inelastic, rapid accumulation of even a small amount of blood (100–150 mL) can lead to **cardiac tamponade**, a life-threatening emergency. **Why "All of the Above" is correct:** * **Chest Injury (Trauma):** This is the most common surgical cause. Penetrating injuries (e.g., stab or gunshot wounds) directly lacerating the myocardium or coronary vessels cause rapid hemopericardium. Blunt trauma can also cause myocardial rupture or pericardial vessel tears. * **Myocardial Infarction (MI):** A transmural MI can lead to **ventricular wall rupture**, typically occurring 3–7 days post-infarct when the necrotic tissue is weakest. This results in sudden hemopericardium and electromechanical dissociation. * **Ruptured Aortic Aneurysm:** Specifically, a **Type A Aortic Dissection** or a proximal ascending aortic aneurysm can rupture retrograde into the pericardial space, as the proximal aorta is intra-pericardial. **Clinical Pearls for NEET-PG:** 1. **Beck’s Triad:** The classic clinical sign of acute hemopericardium leading to tamponade: Hypotension, Jugular Venous Distension (JVD), and Muffled heart sounds. 2. **Pulsus Paradoxus:** A drop in systolic BP >10 mmHg during inspiration; a key diagnostic finding. 3. **Kussmaul’s Sign:** Usually absent in tamponade (more common in constrictive pericarditis), but can occasionally be seen. 4. **Management:** The immediate treatment for hemodynamically unstable hemopericardium is **needle pericardiocentesis** (subxiphoid approach), followed by definitive surgical repair (thoracotomy/sternotomy). 5. **Investigation of Choice:** Bedside **FAST (Focused Assessment with Sonography for Trauma)** or Echocardiography is the gold standard for rapid diagnosis.

Question 108: The Heimlich maneuver is performed to assess:

A. Patency of the nasal airway (Correct Answer)
B. Cardiac function without a pacemaker
C. Pulmonary function without a heart-lung machine
D. Peripheral circulation

Explanation: **Explanation** In the context of **Trauma and Plastic Surgery**, the Heimlich maneuver (specifically the **Heimlich Valve Test**) is a clinical assessment used to determine the **patency of the nasal airway**, particularly in patients undergoing reconstructive procedures like a pharyngeal flap for cleft palate. **Why Option A is Correct:** The test involves manually compressing the patient's chest (mimicking an expiration) while the mouth is closed. If the nasal passages are patent, a puff of air can be felt or heard exiting the nostrils. This is crucial in postoperative settings to ensure that surgical edema or the flap itself has not completely obstructed the upper airway, which would lead to life-threatening respiratory distress. *Note: This should not be confused with the "Heimlich Maneuver" used for choking (abdominal thrusts).* **Why the other options are incorrect:** * **Option B & C:** These refer to cardiac and pulmonary reserve. While the Heimlich *valve* (a one-way flutter valve) is used in thoracic surgery to drain pneumothorax without a bulky underwater seal, the "maneuver" itself does not assess internal organ function or the need for bypass/pacemakers. * **Option D:** Peripheral circulation is assessed via capillary refill time, distal pulses, or Allen’s test, not by chest compression. **High-Yield Clinical Pearls for NEET-PG:** * **Heimlich Valve:** A one-way valve used for transporting patients with a chest tube; it allows air to exit the pleural space but prevents it from re-entering. * **Airway Management:** In trauma, the first step is always airway maintenance with cervical spine protection. * **Cleft Palate Surgery:** Post-operative airway obstruction is a major complication; the Heimlich maneuver is a bedside tool to confirm nasal airflow before extubation.

Question 109: Anti mongoloid slant is a feature of which of the following?

A. Naso-orbitoethmoid fracture
B. Le Fort I fracture
C. Le Fort II fracture
D. Le Fort III fracture (Correct Answer)

Explanation: **Explanation:** **Le Fort III fracture** (Craniofacial dysjunction) involves the complete separation of the midface from the cranial base. The fracture line passes through the nasofrontal suture, the ethmoid bone, the orbit (medial wall, floor, and lateral wall), and the zygomaticofrontal suture. The **Anti-mongoloid slant** (downward outward slant of the palpebral fissure) occurs in Le Fort III fractures due to the disruption of the **zygomaticofrontal suture**. This leads to the displacement of the zygoma and the lateral orbital rim, causing the lateral canthal ligament (which attaches to the Whitnall tubercle on the zygoma) to sag inferiorly. **Analysis of Incorrect Options:** * **Naso-orbitoethmoid (NOE) fracture:** Characterized by traumatic telecanthus (increased distance between medial canthi) due to disruption of the medial canthal ligament, but it does not typically cause a downward slant of the lateral eye. * **Le Fort I:** A horizontal fracture above the apices of the teeth (Guerin’s fracture). It involves only the dentoalveolar segment; the orbits are not involved. * **Le Fort II:** A pyramidal fracture involving the maxilla and nasal bones. While it involves the infraorbital rim, the lateral orbital wall and zygomaticofrontal suture remain intact, so the palpebral slant is generally preserved. **High-Yield Clinical Pearls for NEET-PG:** * **Dish-face deformity:** A classic feature of Le Fort II and III due to midface retrusion. * **Lengthening of the face:** Common in Le Fort II and III. * **CSF Rhinorrhea:** Most common in Le Fort II and III due to involvement of the ethmoid/cribriform plate. * **Guérin’s sign:** Ecchymosis in the region of the greater palatine vessels (seen in Le Fort fractures).

Question 110: A 30-year-old man presents with respiratory distress after a shotgun wound to the face. There is a possible cervical spine injury. What is the most rapid method for securing the airway?

A. Nasotracheal intubation
B. Percutaneous jet ventilation
C. Cricothyroidotomy (Correct Answer)
D. Endotracheal intubation

Explanation: ### Explanation The management of the airway in a patient with severe maxillofacial trauma and potential cervical spine (C-spine) injury is a critical "Airway with C-spine protection" priority in ATLS protocols. **Why Cricothyroidotomy is Correct:** In cases of **extensive maxillofacial trauma** (like a shotgun wound), the normal anatomy is distorted by hemorrhage, edema, and bone fragments. This makes visualization of the vocal cords via direct laryngoscopy (Endotracheal Intubation) nearly impossible. Furthermore, the presence of a **suspected C-spine injury** limits the neck maneuvers (sniffing position) required for intubation. In such "cannot intubate, cannot ventilate" scenarios, a surgical airway—specifically **Cricothyroidotomy**—is the most rapid and definitive method to secure the airway. **Analysis of Incorrect Options:** * **Nasotracheal Intubation:** This is strictly **contraindicated** in mid-face or basilar skull fractures (common in shotgun wounds) due to the risk of intracranial tube displacement through the cribriform plate. * **Endotracheal Intubation:** While usually the first-line method, it is often impossible in severe facial trauma due to blood/debris obscuring the airway and the inability to manipulate the neck. * **Percutaneous Jet Ventilation:** This is a temporary oxygenation measure (needle cricothyroidotomy) but does not provide a definitive airway or protect against aspiration. It is generally reserved for pediatric patients (under 12 years) where surgical cricothyroidotomy is contraindicated. **High-Yield Clinical Pearls for NEET-PG:** * **Surgical Cricothyroidotomy** is the preferred emergency surgical airway in adults. * **Tracheostomy** is not an emergency procedure; it is a formal operation performed in the OT, usually after the airway is already stabilized. * In children <12 years, **Needle Cricothyroidotomy** is preferred to avoid damage to the cricoid cartilage (the only circumferential support of the upper airway in kids). * Always maintain **Manual In-Line Stabilization (MILS)** of the neck during any airway intervention if a C-spine injury is suspected.

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Trauma — MCQs

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