Trauma — MCQs
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What is a characteristic feature of a Le Fort I fracture?
A 56-year-old man admitted to the ICU is in respiratory distress and has an endotracheal tube placed for mechanical ventilation. The settings are a tidal volume of 900 mL, a rate of 12 breaths/min, and FiO2 50%. PEEP is 10 cm of water. Medications include subcutaneous heparin and aspirin. He now develops tachycardia and a blood pressure of 70 mm Hg. Cardiac examination reveals multiple premature contractions. His arterial blood gas reveals a PO2 of 40 mm Hg. What is the most likely cause of this condition?
Le Fort's fracture does NOT involve which of the following bones?
Which imaging modality is the primary test for extradural hemorrhage?
What is an abbreviated laparotomy indicated for?
A patient presents to the emergency department following a road traffic accident. The patient is conscious, speaks in single words, has a respiratory rate of 40/minute, and a blood pressure of 90/40 mm Hg. There are absent breath sounds on the right side. What is your immediate next step?
Which of the following is NOT included in the Glasgow Coma Scale?
A 22-year-old man sustains severe blunt trauma to the back and notes that he cannot move his lower extremities. He is hypotensive and bradycardic. Which of the following is the best initial management of the patient?
What is the best treatment for a subdural hematoma in a deteriorating patient?
Hooding of the eyes is a clinical sign associated with which type of facial fracture?
Trauma Indian Medical PG Practice Questions and MCQs
Question 461: What is a characteristic feature of a Le Fort I fracture?
- A. Bleeding from the ear
- B. Bleeding into the antrum (Correct Answer)
- C. Cerebrospinal fluid rhinorrhea
- D. All of the above
Explanation: **Explanation:** **Le Fort I fractures**, also known as **Guerin’s fractures** or "floating palate" fractures, are horizontal fractures of the maxilla. The fracture line passes through the alveolar ridge, lateral antral wall, and the nasal septum, effectively separating the teeth-bearing portion of the maxilla from the rest of the midface. **Why Option B is Correct:** The fracture line in Le Fort I directly traverses the **lateral and anterior walls of the maxillary sinus (antrum)**. This disruption of the sinus mucosa leads to hemorrhage, which accumulates within the sinus cavity, making **bleeding into the antrum** a hallmark radiographic and clinical feature. **Why Other Options are Incorrect:** * **Option A (Bleeding from the ear):** This is typically associated with fractures of the **temporal bone** or the external auditory canal, often seen in base of skull fractures, not isolated maxillary fractures. * **Option B (CSF Rhinorrhea):** This occurs when there is a breach in the dura mater, usually involving the cribriform plate of the ethmoid bone. This is a characteristic feature of **Le Fort II and III fractures**, where the fracture line extends higher into the nasofrontal and ethmoidal regions. **High-Yield Clinical Pearls for NEET-PG:** * **Le Fort I:** "Floating Palate." Only the hard palate and upper teeth are mobile. * **Le Fort II:** "Pyramidal Fracture." Involves the infraorbital rim. * **Le Fort III:** "Craniofacial Disjunction." The entire facial skeleton is separated from the skull base; associated with "Dish-face" deformity. * **Guerin’s Sign:** Ecchymosis in the region of the greater palatine artery, seen in Le Fort I.
Question 462: A 56-year-old man admitted to the ICU is in respiratory distress and has an endotracheal tube placed for mechanical ventilation. The settings are a tidal volume of 900 mL, a rate of 12 breaths/min, and FiO2 50%. PEEP is 10 cm of water. Medications include subcutaneous heparin and aspirin. He now develops tachycardia and a blood pressure of 70 mm Hg. Cardiac examination reveals multiple premature contractions. His arterial blood gas reveals a PO2 of 40 mm Hg. What is the most likely cause of this condition?
- A. Cardiac arrhythmia
- B. Bronchial secretions
- C. Myocardial infarction
- D. Pneumothorax (Correct Answer)
Explanation: ### Explanation The patient is presenting with **Tension Pneumothorax**, a life-threatening complication of mechanical ventilation. **Why Pneumothorax is the correct answer:** The key clinical clue is the combination of **high tidal volume (900 mL)** and **PEEP (10 cm H₂O)**. High airway pressures can lead to alveolar rupture (barotrauma), causing air to leak into the pleural space. In a ventilated patient, this air is forced in under positive pressure, rapidly leading to a tension pneumothorax. This causes: 1. **Obstructive Shock:** Increased intrapleural pressure shifts the mediastinum and compresses the vena cava, decreasing venous return (preload), leading to sudden hypotension (70 mm Hg) and tachycardia. 2. **Hypoxemia:** Lung collapse and V/Q mismatch result in a severe drop in $PO_2$ (40 mm Hg). 3. **Irritability:** Myocardial hypoxia and strain manifest as premature contractions. **Why the other options are incorrect:** * **A & C (Cardiac Arrhythmia/MI):** While the patient has tachycardia and PVCs, these are likely *secondary* to severe hypoxia and decreased coronary perfusion from the shock state, rather than the primary cause of sudden respiratory distress in a ventilated patient. * **B (Bronchial Secretions):** While secretions can cause hypoxia and increased airway pressures, they do not typically cause sudden, profound hemodynamic collapse (BP 70 mm Hg) unless they lead to total airway obstruction, which is less likely than barotrauma in this setting. **Clinical Pearls for NEET-PG:** * **Diagnosis:** In ICU settings, tension pneumothorax is a clinical diagnosis. Do not wait for a Chest X-ray if the patient is hemodynamically unstable. * **Management:** Immediate **needle thoracocentesis** (traditionally 2nd intercostal space, mid-clavicular line; though ATLS 10th ed. suggests 4th/5th ICS anterior to mid-axillary line) followed by **Tube Thoracostomy**. * **High-Yield Sign:** Look for "increased peak airway pressure" alarms on the ventilator settings in similar vignettes.
Question 463: Le Fort's fracture does NOT involve which of the following bones?
- A. Zygoma
- B. Maxilla
- C. Nasal bones
- D. Mandible (Correct Answer)
Explanation: **Explanation:** Le Fort fractures are classic patterns of **midface fractures** involving the detachment of the midfacial skeleton from the skull base. The correct answer is **Mandible** because Le Fort fractures, by definition, involve the maxilla and its surrounding facial structures; the mandible is a separate, mobile bone of the lower face and is not part of the Le Fort classification system. **Analysis of Options:** * **Mandible (Correct):** It is the lower jaw bone. While it can be fractured concurrently in pan-facial trauma, it is never a component of a Le Fort I, II, or III fracture. * **Maxilla:** This is the central bone involved in all three types. Le Fort I is a horizontal maxillary fracture (floating palate). * **Nasal bones:** These are involved in Le Fort II (pyramidal fracture) and Le Fort III (craniofacial dysjunction) patterns. * **Zygoma:** The zygomatic arch and the zygomaticofrontal suture are specifically involved in **Le Fort III** fractures, where the entire midface is separated from the cranium. **High-Yield Clinical Pearls for NEET-PG:** * **Le Fort I (Guerin's fracture):** Low-level horizontal fracture above the alveolar ridge. Clinical sign: **Floating palate**. * **Le Fort II (Pyramidal):** Involves the nasal bones and infraorbital margin. Clinical sign: **Step-off deformity** at the infraorbital rim and anesthesia in the infraorbital nerve distribution. * **Le Fort III (Craniofacial Dysjunction):** Involves the zygomatic arch and orbits. Clinical sign: **Dish-face deformity** and CSF rhinorrhea (due to cribriform plate involvement). * **Pterygoid Plates:** Involvement of the pterygoid plates of the sphenoid bone is a **mandatory requirement** for a fracture to be classified as any type of Le Fort fracture.
Question 464: Which imaging modality is the primary test for extradural hemorrhage?
- A. Non-contrast computed tomography (NCCT) (Correct Answer)
- B. Ultrasonography (USG)
- C. Doppler ultrasonography
- D. X-ray pelvis
Explanation: **Explanation:** **Non-contrast computed tomography (NCCT) Head** is the gold standard and primary imaging modality for diagnosing Extradural Hemorrhage (EDH). In the acute trauma setting, NCCT is preferred because it is rapid, widely available, and highly sensitive to acute intracranial blood. On NCCT, an EDH typically appears as a **hyperdense, biconvex (lentiform) shape** that does not cross cranial sutures (as the dura is firmly attached at these points). **Why other options are incorrect:** * **Ultrasonography (USG):** While useful for FAST (Focused Assessment with Sonography for Trauma) in abdominal trauma, USG cannot penetrate the adult cranium to visualize intracranial bleeding. * **Doppler Ultrasonography:** This is used to evaluate blood flow velocity in vessels (e.g., carotid stenosis or DVT) and has no role in the primary diagnosis of acute intracranial hemorrhage. * **X-ray Pelvis:** This is part of the primary survey in trauma to rule out pelvic fractures but is irrelevant to head injuries. **Clinical Pearls for NEET-PG:** * **Source of Bleed:** The most common cause of EDH is a tear in the **Middle Meningeal Artery** (often associated with a fracture at the Pterion). * **Lucid Interval:** A classic clinical feature where the patient regains consciousness temporarily before deteriorating. * **Management:** If the hematoma volume is >30 cm³, thickness >15 mm, or midline shift >5 mm, urgent **Surgical Evacuation (Burr hole/Craniotomy)** is indicated. * **MRI:** While more sensitive for diffuse axonal injury, it is not the primary test for EDH due to the time required and incompatibility with metallic life-support equipment.
Question 465: What is an abbreviated laparotomy indicated for?
- A. Coagulopathy (Correct Answer)
- B. Hypotension
- C. Early wound healing
- D. Early ambulation
Explanation: **Explanation:** Abbreviated laparotomy is the surgical component of **Damage Control Surgery (DCS)**. The primary goal is not definitive repair, but the rapid control of hemorrhage and contamination to allow for the reversal of the **"Lethal Triad"** (Coagulopathy, Acidosis, and Hypothermia). **1. Why Coagulopathy is correct:** In severe trauma, patients often develop "bloody vicious cycle" where metabolic exhaustion leads to coagulopathy. Performing a lengthy, definitive surgery in a coagulopathic patient leads to uncontrollable surgical site bleeding. An abbreviated laparotomy (rapid packing and temporary closure) allows the patient to be moved to the ICU for resuscitation, warming, and correction of clotting factors before returning for a planned re-exploration. **2. Why the other options are incorrect:** * **Hypotension:** While trauma patients are often hypotensive, hypotension alone is managed with fluid/blood resuscitation. Abbreviated laparotomy is specifically triggered when physiological exhaustion (the lethal triad) makes definitive surgery life-threatening. * **Early wound healing:** Damage control actually *delays* primary wound healing, as the abdomen is often left open with a temporary dressing (e.g., Bogota bag or VAC) to prevent abdominal compartment syndrome. * **Early ambulation:** This is a goal of elective minimally invasive surgery (like laparoscopy), not emergency trauma surgery where the patient remains critically ill in the ICU. **High-Yield Clinical Pearls for NEET-PG:** * **The Lethal Triad:** Hypothermia (<35°C), Acidosis (pH <7.2), and Coagulopathy. * **Stages of DCS:** 1. Part I: Abbreviated Laparotomy (Control bleed/soiling). 2. Part II: ICU Resuscitation (Warm, ventilate, coagulopathy correction). 3. Part III: Planned Re-operation (Definitive repair). * **Indication:** pH < 7.2, Temperature < 34°C, or clinical non-mechanical bleeding.
Question 466: A patient presents to the emergency department following a road traffic accident. The patient is conscious, speaks in single words, has a respiratory rate of 40/minute, and a blood pressure of 90/40 mm Hg. There are absent breath sounds on the right side. What is your immediate next step?
- A. Intubate the patient
- B. Urgent fluid infusion
- C. Chest X-ray
- D. Needle insertion in the 2nd intercostal space (Correct Answer)
Explanation: ### Explanation The patient presents with the classic clinical triad of **Tension Pneumothorax**: respiratory distress (RR 40/min), hypotension (BP 90/40 mm Hg), and absent breath sounds on the affected side. **Why Option D is Correct:** Tension pneumothorax is a **clinical diagnosis**; one must not wait for radiological confirmation. The immediate priority is **needle decompression** to convert a life-threatening tension pneumothorax into a simple pneumothorax. While the ATLS 10th edition now recommends the 4th or 5th intercostal space (mid-axillary line) for adults, the **2nd intercostal space (mid-clavicular line)** remains a standard landmark frequently tested in exams. This is followed by the definitive management: Wide-bore Chest Tube (Intercostal Drainage). **Why Other Options are Incorrect:** * **A. Intubate the patient:** Positive pressure ventilation in an undrained tension pneumothorax will worsen the intra-thoracic pressure, further decreasing venous return and leading to rapid cardiac arrest. * **B. Urgent fluid infusion:** The hypotension here is obstructive shock, not primarily hypovolemic. Fluids will not resolve the underlying pathology of mediastinal shift. * **C. Chest X-ray:** This is the most common "distractor." You must **never** wait for an X-ray if tension pneumothorax is suspected clinically, as the delay can be fatal. **High-Yield Clinical Pearls for NEET-PG:** * **Diagnosis:** Clinical (Deviated trachea, hyper-resonant percussion, absent breath sounds, distended neck veins, and hypotension). * **Pathophysiology:** One-way valve mechanism leading to increased intra-pleural pressure and decreased venous return (Preload). * **Definitive Treatment:** Tube Thoracostomy (Chest tube) in the "Safe Triangle." * **Beck’s Triad:** Do not confuse this with Cardiac Tamponade (Muffled heart sounds, JVP, Hypotension), where breath sounds are usually normal.
Question 467: Which of the following is NOT included in the Glasgow Coma Scale?
- A. Eye opening
- B. Motor response
- C. Verbal response
- D. Pupil size (Correct Answer)
Explanation: The **Glasgow Coma Scale (GCS)** is a standardized clinical tool used to assess a patient's level of consciousness following a head injury. It evaluates three specific categories of clinical responses: **Eye opening (E)**, **Verbal response (V)**, and **Motor response (M)**. ### Why Pupil Size is the Correct Answer **Pupil size (Option D)** is a critical component of a neurological examination (often indicating brainstem function or herniation), but it is **not** a component of the original GCS score. While the newer "GCS-P" (GCS-Pupils) score incorporates pupillary reactivity to improve prognostic accuracy, the standard GCS remains strictly limited to E, V, and M. ### Why Other Options are Incorrect * **Eye Opening (A):** Scored from 1 to 4. It assesses the brainstem's reticular activating system. * **Verbal Response (C):** Scored from 1 to 5. It assesses central nervous system integration and orientation. * **Motor Response (B):** Scored from 1 to 6. This is the most significant predictor of outcome among the three components. ### High-Yield Clinical Pearls for NEET-PG * **Score Range:** Minimum score is **3** (deep coma/death); maximum is **15** (fully awake). There is no score of 0. * **Severity Classification:** * GCS 13–15: Mild Head Injury * GCS 9–12: Moderate Head Injury * GCS ≤ 8: Severe Head Injury (**"GCS of 8, Intubate"**) * **Modified GCS for Intubated Patients:** If a patient is intubated, the verbal score is recorded as 'T' (e.g., E4VTM6). * **Motor Response:** If a patient has asymmetrical responses (e.g., left side 3, right side 5), the **best** motor response is used for the official GCS calculation.
Question 468: A 22-year-old man sustains severe blunt trauma to the back and notes that he cannot move his lower extremities. He is hypotensive and bradycardic. Which of the following is the best initial management of the patient?
- A. Administration of phenylephrine
- B. Administration of dopamine
- C. Administration of epinephrine
- D. Intravenous fluid bolus (Correct Answer)
Explanation: ### Explanation **Concept: Neurogenic Shock** The patient presents with the classic triad of **Neurogenic Shock**: hypotension, bradycardia, and neurological deficits (paraplegia) following spinal cord injury. This occurs due to the loss of sympathetic tone (vasomotor paralysis) and unopposed vagal activity, leading to massive peripheral vasodilation and a relative hypovolemia. **Why Intravenous (IV) Fluid Bolus is the Correct Initial Management:** In any trauma patient with hypotension, the primary goal is to restore intravascular volume. Even in neurogenic shock, the "relative hypovolemia" caused by vasodilation must be addressed first with **isotonic crystalloids**. This improves venous return and cardiac output. Furthermore, in blunt trauma, one must always rule out or concurrently treat **hemorrhagic shock**, which is the most common cause of hypotension in trauma. **Why Other Options are Incorrect:** * **A, B, & C (Vasopressors/Inotropes):** While phenylephrine (pure alpha-agonist), dopamine, or norepinephrine are often required in neurogenic shock to restore vascular tone and heart rate, they are **secondary** to fluid resuscitation. Starting pressors in an empty vascular bed can worsen tissue ischemia. They are only indicated if hypotension persists despite adequate fluid resuscitation (usually 1–2 liters). **High-Yield Clinical Pearls for NEET-PG:** * **Neurogenic vs. Spinal Shock:** Neurogenic shock is a *hemodynamic* phenomenon (hypotension/bradycardia); Spinal shock is a *neurological* phenomenon (loss of reflexes and flaccid paralysis). * **The Bradycardia Clue:** In all other forms of shock (hypovolemic, cardiogenic, obstructive), the body compensates with tachycardia. **Hypotension + Bradycardia** in trauma is neurogenic shock until proven otherwise. * **Target MAP:** In spinal cord injury, maintain Mean Arterial Pressure (MAP) between **85–90 mmHg** for the first 7 days to ensure spinal cord perfusion.
Question 469: What is the best treatment for a subdural hematoma in a deteriorating patient?
- A. Mannitol infusion
- B. Oxygenation
- C. Corticosteroids
- D. Surgical evacuation (Correct Answer)
Explanation: **Explanation:** The definitive management for a symptomatic or deteriorating patient with a **Subdural Hematoma (SDH)** is **Surgical Evacuation**, typically via an emergent craniotomy. **Why Surgical Evacuation is Correct:** A subdural hematoma involves the accumulation of blood between the dura and the arachnoid mater, usually due to the tearing of **bridging veins**. In a "deteriorating patient" (indicated by a declining GCS, pupillary changes, or signs of herniation), the hematoma is causing a significant mass effect and increased intracranial pressure (ICP). Immediate surgical decompression is required to prevent irreversible brainstem injury and death. **Why Other Options are Incorrect:** * **Mannitol infusion:** While Mannitol is a potent osmotic diuretic used to acutely lower ICP as a "bridge" to surgery, it does not treat the underlying cause (the clot). It is a temporizing measure, not the definitive treatment. * **Oxygenation:** Maintaining airway and oxygenation (ABCDE) is the first step in trauma resuscitation, but it cannot evacuate a space-occupying lesion. * **Corticosteroids:** Steroids (like Dexamethasone) are effective for vasogenic edema associated with brain tumors but have **no role** in the management of acute traumatic brain injury or SDH; they may even increase mortality. **High-Yield Clinical Pearls for NEET-PG:** * **Imaging:** The classic CT finding for SDH is a **crescent-shaped (concave)** hyperdensity that **crosses suture lines** (unlike epidural hematomas). * **Indications for Surgery:** Clot thickness **>10 mm** or a midline shift **>5 mm** on CT, regardless of GCS. * **Chronic SDH:** Often seen in elderly patients or alcoholics due to brain atrophy; treatment is usually via **burr-hole evacuation**.
Question 470: Hooding of the eyes is a clinical sign associated with which type of facial fracture?
- A. Le Fort 1 fracture
- B. Le Fort 2 fracture
- C. Le Fort 3 fracture
- D. Both Le Fort 2 and Le Fort 3 fractures (Correct Answer)
Explanation: ### Explanation **Concept Overview:** "Hooding of the eyes" refers to a clinical appearance where the upper eyelid sags or appears swollen and draped over the eye. In the context of Le Fort fractures, this occurs due to the involvement of the **orbital rims and the nasofrontal suture**, leading to significant periorbital edema and ecchymosis (raccoon eyes). **Why Option D is Correct:** * **Le Fort II (Pyramidal fracture):** The fracture line involves the nasal bones, maxillary sinus, and the **inferior orbital rim**. This disruption leads to infraorbital edema and subconjunctival hemorrhage. * **Le Fort III (Craniofacial disjunction):** The fracture line passes through the nasofrontal suture, the **medial and lateral orbital walls**, and the zygomatic arch. This results in massive midface edema, often described as "dish-face deformity," and severe periorbital swelling that causes the characteristic "hooding." Since both Le Fort II and III involve the orbital structures, hooding of the eyes is a shared clinical feature. **Why Other Options are Incorrect:** * **Le Fort I (Guerin’s fracture):** This is a low-level horizontal fracture separating the alveolar process from the rest of the maxilla. It involves the palate and the base of the antrum but **spares the orbits**. Therefore, hooding of the eyes is not seen. **NEET-PG High-Yield Pearls:** * **Le Fort I:** "Floating Palate." * **Le Fort II:** "Pyramidal" shape; involves the infraorbital nerve (anesthesia of the cheek). * **Le Fort III:** "Craniofacial disjunction"; associated with CSF rhinorrhea due to cribriform plate involvement. * **Dish-face deformity:** Most characteristic of Le Fort III due to the retrusion of the midface. * **Guérin's Sign:** Ecchymosis in the region of the greater palatine vessels (seen in Le Fort I).
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Spinal Trauma
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Extremity Trauma
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Genitourinary Trauma
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