Trauma Practice Questions

Q: Floating maxilla is typically found in which type of fracture?

Le Fort I or Guerin fractures. **Explanation:** The term **"Floating Maxilla"** refers specifically to the **Le Fort I fracture**, also known as a **Guerin fracture**. 1. **Why Le Fort I is correct:** This is a horizontal fracture that runs above the level of the teeth and palate, passing through the maxillary sinus, lower nasal septum, and pterygoid plates. This detachment separates the alveolar process and hard palate from the rest of the midface. Because the entire dental arch and palate become mobile and independent of the skull base, it is clinically described as a "floating maxilla." 2. **Why other options are incorrect:** * **Le Fort II (Pyramidal fracture):** This fracture involves the nasal bones, maxillary sinuses, and infraorbital rims. It results in a **"Floating Midface"** (the nose and maxilla move as a pyramid-shaped unit), rather than just the maxilla. * **Craniomandibular dysjunction:** This is a misnomer in this context. The correct term is **Craniofacial dysjunction**, which refers to **Le Fort III** fractures. In Le Fort III, the entire facial skeleton is separated from the cranial base, leading to a massive mobility of the whole face. **High-Yield Clinical Pearls for NEET-PG:** * **Le Fort I:** Floating Maxilla (Guerin's sign: ecchymosis in the palate). * **Le Fort II:** Pyramidal fracture; involves the **infraorbital nerve** (anesthesia of the cheek). * **Le Fort III:** Craniofacial dysjunction; involves the **zygomatic arch**; associated with CSF rhinorrhea and "Dish-face" deformity. * **Pterygoid Plates:** Involvement of the pterygoid plates is a mandatory diagnostic feature for *all* Le Fort fractures.

Q: A male patient with blunt abdominal trauma is hemodynamically stable. What is the next line of management?

Further imaging of the abdomen. **Explanation:** The management of blunt abdominal trauma (BAT) is primarily dictated by the patient's **hemodynamic stability**. **1. Why "Further imaging of the abdomen" is correct:** In a hemodynamically stable patient, there is time to perform a detailed evaluation to identify specific organ injuries. The gold standard investigation for a stable patient with BAT is a **Contrast-Enhanced Computed Tomography (CECT) of the abdomen**. CECT is highly sensitive and specific for diagnosing solid organ injuries (liver, spleen, kidney), grading them, and detecting retroperitoneal injuries or hemoperitoneum. **2. Why other options are incorrect:** * **Observation (A):** While stable patients are observed, "observation" alone without a definitive diagnosis is incomplete. Imaging must be performed first to determine if the patient can be managed non-operatively or requires intervention. * **Exploratory Laparotomy (C):** This is indicated only if the patient is hemodynamically **unstable** with a positive FAST/DPL, or if there are signs of peritonitis or evisceration. Performing surgery on a stable patient without imaging leads to unnecessary "non-therapeutic" laparotomies. * **Laparoscopy (D):** This is generally not the first-line diagnostic tool in trauma. It may be used in specific cases (e.g., suspected diaphragmatic injury) but only after initial imaging. **High-Yield Clinical Pearls for NEET-PG:** * **Unstable Patient + Blunt Trauma:** Perform **FAST** (Focused Assessment with Sonography for Trauma). If FAST is positive $\rightarrow$ Laparotomy. * **Stable Patient + Blunt Trauma:** Perform **CECT Abdomen**. * **Most common organ injured in BAT:** Spleen (followed by Liver). * **Seat belt sign:** Associated with hollow viscus injury (small bowel) and Chance fractures of the spine. * **Kehr’s Sign:** Referred pain to the left shoulder, indicating splenic rupture/diaphragmatic irritation.

Q: A 23-year-old man was involved in a motor vehicle accident. What is the diagnosis?

Pneumothorax. ***Pneumothorax*** - **Visible pleural line** and **absent peripheral lung markings** on CXR are pathognomonic for pneumothorax in trauma patients. - Common in **blunt chest trauma** from motor vehicle accidents, causing air accumulation in the pleural space. *Aortic dissection* - Typically presents with **widened mediastinum** on CXR and severe **chest/back pain**. - Requires **CT angiography** for diagnosis and shows **intimal flap** within the aortic lumen. *Cardiac rupture* - Extremely rare and usually **fatal within minutes** due to **cardiac tamponade**. - Would show **enlarged cardiac silhouette** and **hemopericardium** on imaging, not pleural line changes. *Diaphragmatic rupture* - Shows **bowel loops** or **abdominal organs** in the chest cavity on CXR. - More common on the **left side** and requires **high suspicion** as initial CXR may be normal.

Q: Which of the following statements concerning topical antimicrobials in common use today is/are true?

All of the above.. This question tests your knowledge of topical antimicrobial agents used in burn management, a high-yield topic for NEET-PG. ### **Explanation of Options** * **Option A (Mafenide Acetate):** Mafenide acetate (Sulfamylon) is unique because it is highly soluble and can penetrate thick burn eschars. However, its application is notoriously painful (burning sensation). It is also a carbonic anhydrase inhibitor, which can lead to metabolic acidosis—a classic exam fact. * **Option B (0.5% Silver Nitrate):** Silver nitrate is delivered in an aqueous solution. Because it is hypotonic, it creates a concentration gradient that leaches electrolytes (sodium, potassium, calcium, and magnesium) out of the wound, potentially leading to hyponatremia and hypokalemia. It also stains tissues and laundry black. * **Option C (Spectrum of Activity):** While all three agents cover a broad spectrum of Gram-positive and Gram-negative bacteria (including *Pseudomonas*), **Silver Nitrate** is the only one among them with significant **anti-fungal** properties. Silver sulfadiazine (the most commonly used) has poor eschar penetration and can cause transient leukopenia. Since all three statements are pharmacologically accurate, **Option D** is the correct answer. ### **High-Yield Clinical Pearls for NEET-PG** | Agent | Key Advantage | Major Disadvantage/Side Effect | | :--- | :--- | :--- | | **Silver Sulfadiazine** | Most common; painless | **Leukopenia** (transient); poor eschar penetration. | | **Mafenide Acetate** | **Best eschar penetration** | **Painful**; Metabolic acidosis (Carbonic anhydrase inhibition). | | **Silver Nitrate** | Anti-fungal activity | **Electrolyte leaching** (Hyponatremia); Black staining. | * **Rule of Thumb:** If a question mentions a burn patient with a thick eschar and subsequent respiratory compensation for metabolic acidosis, think **Mafenide Acetate**.

Q: An 18-year-old man presents after a motorcycle accident with a history of brief unresponsiveness. Skull films show a left temporal bone fracture. After the x-ray, he loses consciousness and develops left pupil dilation. What is the most likely diagnosis?

Epidural hematoma. **Explanation:** The clinical presentation is a classic textbook description of an **Epidural Hematoma (EDH)**. The key diagnostic feature here is the **"Lucid Interval"**—a period of brief initial unconsciousness (due to concussion) followed by a temporary recovery of consciousness, and then a rapid neurological deterioration as the hematoma expands. **Why Epidural Hematoma is correct:** * **Mechanism:** Most EDHs are caused by a skull fracture (temporal bone) that lacerates the **Middle Meningeal Artery**. * **Clinical Progression:** The arterial bleed rapidly increases intracranial pressure, leading to herniation. * **Pupillary Findings:** The **ipsilateral (left) pupil dilation** is due to uncal herniation compressing the third cranial nerve (Oculomotor nerve), while the contralateral hemiparesis (if present) occurs due to pressure on the motor cortex. **Why other options are incorrect:** * **A. Ruptured berry aneurysm:** Typically presents as a Subarachnoid Hemorrhage (SAH) with a "thunderclap headache" and no history of trauma. * **B. Acute subdural hematoma:** Usually results from tearing of **bridging veins**. It is more common in elderly patients or severe deceleration injuries and typically lacks a lucid interval, presenting with a more gradual or persistently depressed level of consciousness. * **C. Intraabdominal hemorrhage:** While common in trauma, it would present with signs of hemorrhagic shock (tachycardia, hypotension) rather than focal neurological deficits like pupil dilation. **NEET-PG High-Yield Pearls:** * **Imaging Gold Standard:** Non-contrast CT (NCCT) Head shows a **Biconvex (Lentiform)**, hyperdense, lens-shaped opacity that does not cross suture lines. * **Source of Bleed:** Middle Meningeal Artery (most common) or dural venous sinuses. * **Management:** Urgent surgical evacuation via craniotomy/burr hole if the hematoma is large or causing a midline shift.

Q: Which statement is true about aortic transaction?

Most commonly associated with deceleration injury. **Explanation:** **Aortic Transection** (Traumatic Aortic Disruption) is a life-threatening emergency typically resulting from blunt chest trauma. **1. Why Option A is correct:** The primary mechanism is a **sudden deceleration injury** (e.g., high-speed motor vehicle accidents or falls from heights). During deceleration, the mobile heart and ascending aorta move forward, while the descending aorta is fixed to the posterior chest wall. This creates a powerful **shearing force** at the **Aortic Isthmus** (the junction between the fixed arch and mobile descending aorta, just distal to the left subclavian artery), which is the most common site of injury (90%). **2. Why other options are incorrect:** * **Option B:** While mortality is high (80% die at the scene), the question asks for the "most true" characteristic regarding its nature/etiology. In modern exams, "High mortality" is considered a clinical outcome rather than a defining diagnostic feature. * **Option C:** While surgery was historically the definitive treatment, **Endovascular Aneurysm Repair (TEVAR)** has now become the preferred first-line management over open surgery due to lower morbidity. * **Option D:** **CT Angiography (CTA)** is now the gold standard and investigation of choice due to its high sensitivity and speed. Conventional aortography is invasive and rarely used today. **Clinical Pearls for NEET-PG:** * **Most common site:** Aortic Isthmus (distal to the origin of the left subclavian artery). * **X-ray findings:** Widened mediastinum (>8cm), loss of aortic knob contour, and deviation of the nasogastric tube to the right. * **Management:** Initial stabilization involves "permissive hypotension" (keeping SBP ~100 mmHg) using Beta-blockers (Esmolol) to prevent complete rupture before definitive TEVAR.

Q: A 5-year-old child has burns on the body surface equivalent to the size of their palm. What is the estimated percentage of total body surface area affected by the burns?

1%. **Explanation:** The correct answer is **1%**. This is based on the **"Rule of Palms,"** a clinical tool used to estimate the Total Body Surface Area (TBSA) of small or patchy burns. **1. Why the Correct Answer is Right:** In both pediatric and adult populations, the area of the patient’s **entire palmar surface** (including the palm and the fingers) is approximately equal to **1% of their TBSA**. This method is particularly useful in children because their body proportions differ significantly from adults (e.g., larger heads and smaller limbs), making the "Rule of Nines" less accurate for small, irregular burn areas. **2. Why the Incorrect Options are Wrong:** * **Option B (5%):** This is an overestimation. While 5% might represent a small segment of a limb, it far exceeds the area of a single palm. * **Option C (10%):** In a child, 10% TBSA is a significant burn (roughly equivalent to an entire arm). * **Option D (9%):** This refers to the **"Rule of Nines"** (Wallace’s Rule), where 9% represents the TBSA of a single upper limb or half of a lower limb in an adult. It does not correlate with the size of a palm. **3. Clinical Pearls for NEET-PG:** * **Lund and Browder Chart:** This is the **most accurate** method for calculating TBSA in children as it accounts for age-related changes in body proportions. * **Rule of Nines (Pediatric):** Unlike adults, a child’s **head** accounts for **18%**, while each **leg** accounts for **14%**. * **Fluid Resuscitation:** For children, the **Parkland Formula** (4ml x kg x %TBSA) is used, but **Maintenance Fluids** (using the 4-2-1 rule) must be added separately because children have lower glycogen stores and are prone to hypoglycemia. * **Note:** When using the Rule of Palms, ensure you use the **patient's palm size**, not the examiner's.

Q: Following an injury to the shoulder joint, a baseball catcher developed symptoms including swelling of the right upper extremity, skin atrophy, and vasomotor instability, along with a burning sensation in the involved extremity. What would be the next step in management?

Prednisone for 2 weeks in resistant cases. ### Explanation The clinical presentation described—burning pain, swelling, vasomotor instability (temperature/color changes), and skin atrophy following trauma—is characteristic of **Complex Regional Pain Syndrome (CRPS)**, formerly known as Reflex Sympathetic Dystrophy (RSD) or Sudeck’s atrophy. **Why Option D is Correct:** The primary management of CRPS focuses on physical therapy and pain control (NSAIDs, gabapentin). However, in **resistant cases** or those with significant inflammatory features, systemic **corticosteroids (e.g., Prednisone)** are the next step. They help reduce neurogenic inflammation and have been shown to improve functional outcomes and reduce pain during the acute phase. **Why Incorrect Options are Wrong:** * **A & B (Immobilization/Avoiding PT):** These are contraindicated. Prolonged immobilization is a known trigger for CRPS. The cornerstone of treatment is early mobilization and aggressive physical therapy to prevent joint stiffness and further atrophy. * **C (Forceful Manipulation):** Forceful manipulation under anesthesia is dangerous in CRPS patients as it can exacerbate the inflammatory response, worsen the pain, and potentially cause fractures due to underlying patchy osteoporosis (Sudeck’s atrophy). **Clinical Pearls for NEET-PG:** * **Budapest Criteria:** Used for the clinical diagnosis of CRPS (requires presence of sensory, vasomotor, sudomotor, and motor/trophic signs). * **Radiology:** X-rays may show patchy, periarticular osteopenia (Sudeck’s atrophy). * **Triple Phase Bone Scan:** Highly sensitive in the early stages, showing increased periarticular uptake. * **Vitamin C Prophylaxis:** Administering Vitamin C after distal radius fractures has been shown to reduce the incidence of CRPS.

Question 1

Floating maxilla is typically found in which type of fracture?

Accepted Answer

Le Fort I or Guerin fractures

Answer

Le Fort II or pyramidal fractures

Answer

Craniomandibular dysjunction

Answer

All of the above

Question 2

A male patient with blunt abdominal trauma is hemodynamically stable. What is the next line of management?

Accepted Answer

Further imaging of the abdomen

Answer

Observation

Answer

Exploratory laparotomy

Answer

Laparoscopy

Question 3

A 23-year-old man was involved in a motor vehicle accident. What is the diagnosis?

Accepted Answer

Pneumothorax

Answer

Aortic dissection

Answer

Cardiac rupture

Answer

Diaphragmatic rupture

Question 4

Which of the following statements concerning topical antimicrobials in common use today is/are true?

Accepted Answer

All of the above.

Answer

Of the common topical antimicrobials, only mafenide acetate is painful upon application.

Answer

The use of 0.5% silver nitrate is associated with trans-eschar leeching of sodium and potassium from the wound.

Answer

Silver sulfadiazine, mafenide acetate, and 0.5% silver nitrate all have broad-spectrum activity, however, only silver nitrate has anti-fungal activity.

Question 5

An 18-year-old man presents after a motorcycle accident with a history of brief unresponsiveness. Skull films show a left temporal bone fracture. After the x-ray, he loses consciousness and develops left pupil dilation. What is the most likely diagnosis?

Accepted Answer

Epidural hematoma

Answer

Ruptured berry aneurysm

Answer

Acute subdural hematoma

Answer

Intraabdominal hemorrhage

Question 6

Which statement is true about aortic transaction?

Accepted Answer

Most commonly associated with deceleration injury

Answer

High mortality

Answer

Surgery is the definitive treatment

Answer

Aortography is the gold standard

Question 7

A 5-year-old child has burns on the body surface equivalent to the size of their palm. What is the estimated percentage of total body surface area affected by the burns?

Accepted Answer

1%

Answer

5%

Answer

10%

Answer

9%

Question 8

All of the following are the components of Cushing's triad except?

Accepted Answer

Pupillary dilatation

Answer

Bradycardia

Answer

Hypertension

Answer

Respiratory irregularity

Question 9

What is true regarding the presentation(s) of thoracic duct injury?

Accepted Answer

Lymphopenia

Answer

Electrolyte disbalance

Answer

Lymphedema

Answer

Dehydration

Question 10

Following an injury to the shoulder joint, a baseball catcher developed symptoms including swelling of the right upper extremity, skin atrophy, and vasomotor instability, along with a burning sensation in the involved extremity. What would be the next step in management?

Accepted Answer

Prednisone for 2 weeks in resistant cases

Answer

Immobilization of the right arm in a cast

Answer

Avoidance of physical therapy for 3 months

Answer

Forceful shoulder joint manipulation

Trauma — MCQs

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