Trauma Practice Questions

Q: Under which category would you classify this injury?

Degloving. ***Degloving*** - A **degloving injury** occurs when skin and subcutaneous tissue are forcibly separated from underlying structures, creating a **flap-like appearance** with exposed deeper tissues. - Typically caused by **shearing forces** in trauma, such as motor vehicle accidents or machinery injuries, requiring immediate **surgical intervention** for tissue viability assessment. *Bites* - **Animal or human bites** create **punctate wounds** with characteristic **tooth mark patterns** and potential for deep tissue penetration. - Associated with high risk of **infection** due to oral flora contamination, but do not typically cause large tissue separation. *Puncture wounds* - **Small, deep wounds** caused by sharp, narrow objects like nails or needles, creating a **small entrance point**. - Characterized by **minimal external bleeding** but potential for deep structure injury, unlike the extensive tissue separation seen in degloving. *Hematoma* - A **localized collection of blood** beneath the skin, appearing as a **raised, discolored area** without open wounds. - Results from **blunt trauma** causing vessel rupture but maintains **intact skin integrity**, contrasting with the tissue separation in degloving injuries.

Q: After trauma, hypovolemic shock can be due to all EXCEPT:

Head injury. **Explanation:** The core principle in trauma management is that **isolated head injury does not cause hypovolemic shock.** The cranial vault is a rigid, enclosed space; the volume of blood required to cause hemorrhagic shock (typically >15-30% of total blood volume) cannot accumulate inside the skull without causing fatal brain herniation first. If a patient with a head injury is in shock, the clinician must look for an extracranial source of bleeding. * **Option A (Correct):** While head injuries cause neurological deficits or "Neurogenic shock" (rarely, and usually associated with spinal cord injury), they do not cause hypovolemia. The only exception is in infants, where the open fontanelles allow enough blood to accumulate to cause shock. * **Option B:** Blunt trauma to abdominal viscera (e.g., splenic or liver laceration) is a classic cause of massive intraperitoneal hemorrhage leading to hypovolemic shock. * **Option C:** Each hemithorax can hold up to 1.5–2 liters of blood. A massive hemothorax is a common cause of rapid hemorrhagic shock. * **Option D:** Pelvic fractures, especially "open book" types, can lead to extensive retroperitoneal bleeding (often 2 liters or more), making it a major source of hypovolemia. **Clinical Pearls for NEET-PG:** * **The "Fatal Five" areas of hemorrhage:** Chest, Abdomen, Pelvis/Retroperitoneum, Long bones (Femur), and "The Floor" (external bleeding). * **Cushing’s Triad:** In head injuries with increased ICP, you see **Hypertension** and Bradycardia—the opposite of the hypotension and tachycardia seen in hypovolemic shock. * **Rule of Thumb:** If a trauma patient is hypotensive, it is **hemorrhagic shock** until proven otherwise.

Q: A patient involved in a road traffic accident presents with a pulse rate of 96 beats per minute, a systolic blood pressure of 68 mmHg, and a respiratory rate of 20 breaths per minute. The patient is confused. What is the likely percentage of blood loss?

35%. This question tests your knowledge of the **ATLS (Advanced Trauma Life Support) Classification of Hemorrhagic Shock**, a high-yield topic for NEET-PG. ### **1. Why Option C (35%) is Correct** The patient is in **Class III Hemorrhage** (1500–2000 mL or **30–40% blood loss**). The key clinical indicators in this scenario are: * **Blood Pressure:** Hypotension (SBP <90 mmHg) is the hallmark of Class III shock. In Classes I and II, compensatory mechanisms maintain a normal SBP. * **Mental Status:** The patient is **confused**. Class I and II patients are usually alert or slightly anxious; confusion signifies significant cerebral hypoperfusion. * **Heart Rate:** While the pulse is 96 bpm (borderline), the presence of hypotension and confusion overrides the heart rate in staging. ### **2. Why Other Options are Incorrect** * **Option A (15%):** Corresponds to **Class I**. Vital signs (BP, HR, RR) are typically normal, and the patient is alert. * **Option B (25%):** Corresponds to **Class II** (15–30%). While tachycardia and narrowed pulse pressure occur, the **systolic BP remains normal**. The patient is usually only anxious. * **Option D (45%):** Corresponds to **Class IV** (>40%). This is pre-terminal. The patient would be lethargic/comatose, with severe tachycardia (>140) and negligible urine output. ### **3. NEET-PG High-Yield Pearls** * **Earliest Sign of Shock:** Tachycardia (except in Class I). * **Earliest Change in Vital Signs:** Narrowed Pulse Pressure (seen in Class II). * **The "Rule of 70/80/90":** If you can feel a radial pulse, SBP is at least 80 mmHg; femoral is 70; carotid is 60 (Traditional teaching, though ATLS now emphasizes clinical shock over specific numbers). * **Management:** Class I & II usually require crystalloids; **Class III & IV require blood transfusion.**

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.

Question 1

Under which category would you classify this injury?

Accepted Answer

Degloving

Answer

Bites

Answer

Puncture wounds

Answer

Hematoma

Question 2

After trauma, hypovolemic shock can be due to all EXCEPT:

Accepted Answer

Head injury

Answer

Blunt trauma to abdominal viscera

Answer

Hemothorax

Answer

Pelvic fracture

Question 3

A patient involved in a road traffic accident presents with a pulse rate of 96 beats per minute, a systolic blood pressure of 68 mmHg, and a respiratory rate of 20 breaths per minute. The patient is confused. What is the likely percentage of blood loss?

Accepted Answer

35%

Answer

15%

Answer

25%

Answer

45%

Question 4

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 5

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 6

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 7

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 8

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 9

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 10

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%

Trauma — MCQs

Trauma — MCQs

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