Trauma Practice Questions

Q: What is a suprazygomatic fracture?

Le Fort III fracture. **Explanation:** The **Le Fort III fracture**, also known as **Craniofacial Dysjunction**, is termed a **suprazygomatic fracture** because the fracture line passes above the zygomatic bone, effectively separating the entire facial skeleton from the cranial base. * **Le Fort III (Correct):** The fracture line starts at the nasofrontal suture, extends across the bridge of the nose, through the ethmoid bone, along the medial orbital wall, across the orbital floor, and through the lateral orbital wall. Crucially, it involves the **zygomaticofrontal suture** and the **zygomatic arch**. Since the break occurs above the malar (zygomatic) bone, it is "suprazygomatic." * **Le Fort I (Incorrect):** This is a **Guerin fracture** or horizontal maxillary fracture. It occurs at the level of the nasal floor, separating the alveolar process from the rest of the maxilla. It is "infrazygomatic." * **Le Fort II (Incorrect):** This is a **Pyramidal fracture**. The fracture line passes through the nasal bones, maxillary sinus, and infraorbital rim. While it approaches the zygomatic area, it stays medial to the zygomaticomaxillary suture. * **Mandibular fracture (Incorrect):** These involve the lower jaw and are anatomically unrelated to the zygomatic complex or the Le Fort classification of midface fractures. **High-Yield Clinical Pearls for NEET-PG:** * **Dish-face deformity:** Classic clinical appearance of Le Fort II and III due to the backward and downward displacement of the midface. * **CSF Rhinorrhea:** Most common in Le Fort III due to involvement of the ethmoid bone/cribriform plate. * **Pterygoid Plates:** Involvement of the pterygoid plates is a mandatory feature for all Le Fort fractures. * **Guérin's Sign:** Ecchymosis in the region of the greater palatine artery (seen in Le Fort I).

Q: Which of the following structures remains intact in a closed head injury?

Dura mater. In neurosurgery and trauma management, the classification of head injuries is primarily based on the integrity of the **Dura Mater**. ### **Why Dura Mater is the Correct Answer** A **closed head injury** is defined as a traumatic brain injury where the **dura mater remains intact**. Even if there are extensive fractures of the skull or severe underlying brain parenchymal damage (like contusions or diffuse axonal injury), the injury is classified as "closed" as long as the protective dural barrier is not breached. This is a critical distinction because an intact dura prevents direct communication between the external environment and the cerebrospinal fluid (CSF), significantly reducing the risk of meningitis and intracranial sepsis. ### **Analysis of Incorrect Options** * **A. Scalp & B. Skull:** In a closed head injury, the scalp may have lacerations and the skull may have displaced or non-displaced fractures. The presence of a skull fracture does not automatically make an injury "open." * **D. Arachnoid Mater:** The arachnoid mater is deep to the dura. If the dura mater is breached (making it an open injury), the arachnoid is almost always breached as well. However, the defining anatomical boundary for the classification is the dura. ### **High-Yield Clinical Pearls for NEET-PG** * **Open Head Injury:** Defined by a breach in the dura mater. Clinical signs include CSF rhinorrhea, CSF otorrhea, or brain tissue herniating through a wound. * **Compound Fracture:** A skull fracture associated with an overlying scalp laceration. If the dura is torn underneath, it becomes an open head injury. * **The "Dural Barrier":** The dura is the toughest layer of the meninges (pachymeninx). Its integrity is the single most important factor in preventing post-traumatic intracranial infection.

Q: Which type of shock is typically seen in patients with severe burns?

Hypovolemic shock. **Explanation:** In severe burns, the primary mechanism of shock is **Hypovolemic Shock**, specifically a sub-type often referred to as "Burn Shock." **Why Hypovolemic Shock is Correct:** The pathophysiology involves a massive systemic inflammatory response leading to increased capillary permeability. This causes a rapid shift of fluid, electrolytes, and plasma proteins from the intravascular compartment into the interstitial space (edema). Additionally, the loss of the skin barrier leads to significant evaporative fluid loss. This results in decreased circulating blood volume, reduced cardiac output, and tissue hypoperfusion. **Analysis of Incorrect Options:** * **Cardiogenic Shock:** This occurs due to primary pump failure (e.g., Myocardial Infarction). While severe burns can cause secondary myocardial depression due to circulating inflammatory cytokines (like TNF-α), the initiating and predominant cause of shock is fluid loss, not primary heart failure. * **Both Cardiogenic and Hypovolemic:** While there is a cardiac depressive component in the late stages of burn shock, the standard clinical classification and the immediate life-threatening priority in burn management is the hypovolemic component. For NEET-PG purposes, hypovolemia is the definitive answer. **High-Yield Clinical Pearls for NEET-PG:** * **Parkland Formula:** The gold standard for fluid resuscitation in the first 24 hours is **4 mL × Body Weight (kg) × % TBSA** (Total Body Surface Area) of Ringer’s Lactate. * **Fluid of Choice:** Crystalloids, specifically **Ringer’s Lactate**, are preferred because they help combat the metabolic acidosis often seen in burn patients. * **Rule of Nines:** Used to quickly estimate TBSA; remember that only 2nd and 3rd-degree burns are included in the calculation. * **Indicator of Resuscitation:** The most reliable indicator of adequate fluid resuscitation is **Urinary Output** (Target: 0.5–1.0 mL/kg/hr in adults).

Q: Which is the next best management for a patient with the following CT scan report?

Burr hole surgery. ***Burr hole surgery*** - The CT scan shows a **chronic subdural hematoma** (crescent-shaped hypodense collection over convexity with midline shift), requiring definitive surgical drainage. - **Burr hole evacuation** is the gold standard treatment for symptomatic chronic subdural hematoma, providing immediate decompression and symptom relief. *Elective hyperventilation* - This is a **temporizing measure** used to reduce intracranial pressure by causing cerebral vasoconstriction, not a definitive treatment. - **Chronic subdural hematoma** requires surgical drainage; hyperventilation alone cannot evacuate the organized blood collection. *Mannitol* - An **osmotic diuretic** used as a temporizing measure to reduce cerebral edema and intracranial pressure, not curative for hematomas. - While it may provide temporary relief, **chronic subdural hematoma** requires surgical evacuation for definitive management. *Ventriculoperitoneal shunting* - This procedure is indicated for **hydrocephalus** (enlarged ventricles with CSF accumulation), not for subdural hematomas. - The CT findings describe a **subdural collection**, not ventricular enlargement requiring CSF diversion.

Q: What is the treatment of choice for a gunshot injury?

Debridement. **Explanation:** The treatment of choice for a gunshot injury is **thorough debridement**. Gunshot wounds are classified as high-energy trauma characterized by "cavitation." As a projectile passes through tissue, it creates a temporary pulsating cavity that sucks in debris, clothing, and bacteria, leading to extensive "zone of injury" beyond the visible track. **Why Debridement is the Correct Answer:** The primary goal in managing ballistic trauma is the removal of devitalized tissue, foreign bodies, and contaminants. Debridement (specifically "wound excision") converts a contaminated, ragged wound into a clean one, preventing necrotizing infections and gas gangrene. In surgical priority, stabilizing the wound bed through debridement always precedes closure. **Analysis of Incorrect Options:** * **A. Primary suture only:** This is contraindicated. Closing a gunshot wound primarily traps contaminants and anaerobic bacteria in deep tissues, leading to abscess formation or sepsis. * **C. Debridement and primary suture:** Even after debridement, gunshot wounds are considered "dirty/infected." Primary closure carries a high risk of wound dehiscence and infection due to delayed tissue necrosis (the "wait and see" zone). * **D. Debridement and secondary suture:** While this is a common management strategy (Delayed Primary Closure), the **initial and most critical step** (treatment of choice) remains the debridement itself. **NEET-PG High-Yield Pearls:** * **Cavitation Effect:** Proportional to the velocity of the bullet ($KE = \frac{1}{2}mv^2$). High-velocity bullets (>600-750 m/s) cause massive tissue disruption. * **Management Rule:** "Leave the bullet, treat the track." Unless the bullet is intra-articular, in a vessel, or easily accessible, searching for it is secondary to debridement. * **Antibiotics:** Always administer Tetanus prophylaxis and broad-spectrum antibiotics (covering Gram-positives and anaerobes).

Q: What is the safest strategy for treating a patient with an inhalational burn injury who presents within 4-5 hours?

Elective endotracheal intubation. **Explanation:** Inhalational burn injuries are dynamic and life-threatening. The primary concern is **progressive upper airway edema**, which can lead to complete airway obstruction within 24 hours, even if the patient appears stable initially. **Why Option D is Correct:** **Elective endotracheal intubation** is the safest strategy because it secures the airway *before* the onset of massive edema. Once laryngeal edema develops, intubation becomes technically difficult or impossible, often necessitating a risky emergency surgical airway. Proactive management is indicated if there are signs of airway involvement (e.g., singed nasal hair, carbonaceous sputum, or oropharyngeal burns). **Why Other Options are Incorrect:** * **Options A & B:** While supplemental oxygen is necessary, nasal catheters and face masks do not protect the airway from mechanical obstruction caused by swelling. Relying on these in a patient with significant inhalational risk is dangerous "watchful waiting." * **Option C:** Cricothyroidotomy is a rescue procedure for a "cannot intubate, cannot ventilate" scenario. It is not an elective first-line treatment. Elective intubation is less invasive and carries fewer long-term complications (like subglottic stenosis). **Clinical Pearls for NEET-PG:** * **Gold Standard for Diagnosis:** Fiberoptic bronchoscopy (to visualize soot, edema, or mucosal ulceration). * **Classic Indicators:** Singed nasal hair, soot in the oral cavity, hoarseness of voice, and history of fire in an enclosed space. * **Carbon Monoxide (CO) Poisoning:** Always suspect CO poisoning in inhalational burns; treat with 100% humidified oxygen (reduces CO half-life from 4 hours to 40-60 minutes). * **Rule of Thumb:** If in doubt about the airway in a burn patient, **intubate early.**

Question 1

What is a suprazygomatic fracture?

Accepted Answer

Le Fort III fracture

Answer

Le Fort I fracture

Answer

Le Fort II fracture

Answer

Mandibular fracture

Question 2

Which of the following structures remains intact in a closed head injury?

Accepted Answer

Dura mater

Answer

Scalp

Answer

Skull

Answer

Arachnoid mater

Question 3

Which of the following statements about shock is true?

Accepted Answer

An early change in shock is increased release of noradrenaline.

Answer

During dehydration, both intracellular fluid (ICF) and extracellular fluid (ECF) volumes decrease.

Answer

A fluid loss of 10-20% is compatible with life.

Answer

The risk of death is high when fluid loss is 20-40%.

Question 4

A 25-year-old male presents to the Emergency Department with a history of a road traffic accident two hours prior. The patient is hemodynamically stable. The abdomen is soft. On catheterization of the bladder, hematuria is noticed. What is the next step in management?

Accepted Answer

Contrast-enhanced computed tomography of the abdomen

Answer

Immediate laparotomy

Answer

Retrograde cystourethrography

Answer

Diagnostic peritoneal lavage

Question 5

Which type of shock is typically seen in patients with severe burns?

Accepted Answer

Hypovolemic shock

Answer

Cardiogenic shock

Answer

Both cardiogenic and hypovolemic shock

Answer

None of the above

Question 6

From the following list, choose the appropriate order of priorities in the management of a patient with polytrauma: 1. Control of external haemorrhage 2. Intravenous infusion and transfusion 3. Maintenance of patent airway 4. Relief of a tension pneumothorax 5. Splinting of fractures.

Accepted Answer

3,4,1,2,5

Answer

4,1,5,3,2

Answer

2,1,5,3,4

Question 7

A 65-year-old male presents with mental confusion and poor physical coordination three weeks after a minor head injury. Radiographic examination reveals bleeding over the right cerebral hemisphere. What is the most likely diagnosis?

Accepted Answer

Subdural hemorrhage

Answer

Subarachnoid hemorrhage

Answer

Epidural hemorrhage

Answer

Intracerebral hemorrhage

Question 8

Which is the next best management for a patient with the following CT scan report?

Accepted Answer

Burr hole surgery

Answer

Elective hyperventilation

Answer

Mannitol

Answer

Ventriculoperitoneal shunting

Question 9

What is the treatment of choice for a gunshot injury?

Accepted Answer

Debridement

Answer

Primary suture only

Answer

Debridement and primary suture

Answer

Debridement and secondary suture

Question 10

What is the safest strategy for treating a patient with an inhalational burn injury who presents within 4-5 hours?

Accepted Answer

Elective endotracheal intubation

Answer

Binasal catheter oxygen inhalation

Answer

Oxygen therapy with a well-fitting face mask

Answer

Elective cricothyroidotomy

Trauma — MCQs

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