Trauma Practice Questions

Q: An 8-year-old boy is brought to the emergency room after accidentally touching a hot iron with his forearm. On examination, the burned area has weeping blisters and is very tender to the touch. What is the burn depth?

Second degree. **Explanation:** The clinical presentation of **weeping blisters** and **exquisite tenderness** is hallmark for a **Second-degree (Partial-thickness) burn**. 1. **Why the correct answer is right:** Second-degree burns involve the epidermis and varying depths of the dermis. They are characterized by the formation of blisters (due to fluid accumulation between the epidermal and dermal layers) and a moist, "weeping" appearance. Because the sensory nerve endings in the dermis remain intact and exposed, these burns are extremely painful and sensitive to touch or air. 2. **Why the incorrect options are wrong:** * **First-degree (Superficial):** These involve only the epidermis (e.g., sunburn). They are red and painful but **do not** form blisters. * **Third-degree (Full-thickness):** These extend through the entire dermis. The skin appears leathery, charred, or waxy white. Crucially, they are **painless** (anesthetic) because the nerve endings are destroyed. * **Fourth-degree:** these involve deeper structures like fascia, muscle, or bone. They are also painless and typically require surgical debridement or amputation. **NEET-PG High-Yield Pearls:** * **Pain Paradox:** The more painful a burn is, the more likely it is to be superficial (2nd degree). Total loss of sensation indicates a deep 3rd or 4th-degree burn. * **Capillary Refill:** Present in 2nd-degree superficial burns; absent in 3rd-degree burns. * **Healing:** 2nd-degree superficial burns usually heal within 2–3 weeks with minimal scarring, whereas deep 2nd-degree burns may require grafting to prevent hypertrophic scars. * **Rule of 9s:** Remember that for pediatric patients (like this 8-year-old), the Lund and Browder chart is more accurate than the standard Rule of 9s used for adults.

Q: A five-year-old child presents to the emergency department with burns. What percentage of Body Surface Area (BSA) does a burn area corresponding to the size of his palm represent?

1% BSA. **Explanation:** The correct answer is **A. 1% BSA**. **Underlying Medical Concept:** In burn assessment, the **"Rule of Palms"** (also known as the Palmar Method) is a quick clinical tool used to estimate the percentage of Total Body Surface Area (TBSA) involved in small or patchy burns. According to this rule, the area of the **patient’s entire palmar surface** (including the palm and the fingers) represents approximately **1% of their TBSA**. This rule is particularly useful in pediatric cases and irregular burn patterns where the "Rule of Nines" is difficult to apply. **Analysis of Incorrect Options:** * **B (5% BSA):** This is an overestimation. In infants, the entire head represents roughly 18-19%, but a single palm remains 1%. * **C (10% BSA):** This would represent an entire upper limb in an adult (9%) or a significant portion of a child's torso. * **D (20% BSA):** This represents a major burn (e.g., both arms or the entire anterior trunk). **NEET-PG High-Yield Pearls:** 1. **Patient’s Palm vs. Examiner’s Palm:** Always use the **patient’s** palm for estimation, not the clinician's. 2. **Rule of Nines (Wallace):** Used for adults. Note that in children, the head is larger (18%) and the legs are smaller (14% each) compared to adults (Head 9%, Legs 18% each). 3. **Lund and Browder Chart:** This is the **most accurate** method for calculating TBSA in children as it accounts for changes in body proportions during growth. 4. **First Aid:** The immediate management of burns involves cooling with running tap water (15°C) for 20 minutes; avoid ice as it causes vasoconstriction and worsens ischemia.

Q: A man sustained an injury and presented with fluid coming out through his nose. What could be the possible fracture?

Fracture base of skull. **Explanation:** The presentation of fluid leaking from the nose following head trauma is a classic sign of **Cerebrospinal Fluid (CSF) Rhinorrhea**. This occurs due to a **Fracture of the Base of the Skull**, specifically involving the **anterior cranial fossa**. **Why Option A is Correct:** A fracture in the anterior skull base often involves the **cribriform plate of the ethmoid bone**. This injury creates a communication between the subarachnoid space and the nasal cavity by tearing the overlying dura mater. Consequently, CSF leaks through the nose. This is a critical diagnostic sign indicating an open communication with the intracranial compartment, posing a high risk for meningitis. **Why Other Options are Incorrect:** * **Fracture of Mandible (B):** This involves the lower jaw. While it causes malocclusion or chin deviation, it does not involve the cranial vault or dural structures; hence, it cannot cause a CSF leak. * **Fracture of Maxilla (C):** While Le Fort II and III fractures involve the midface and can occasionally be associated with skull base injuries, a simple maxillary fracture primarily causes facial deformity or epistaxis (blood), not clear CSF leakage, unless the skull base is also compromised. **High-Yield Clinical Pearls for NEET-PG:** 1. **Halo/Target Sign:** If CSF is mixed with blood, dropping it on a piece of filter paper results in a central red spot (blood) surrounded by a clear ring (CSF). 2. **Beta-2 Transferrin:** This is the most specific biochemical marker to confirm that the fluid is indeed CSF. 3. **Battle’s Sign:** Ecchymosis over the mastoid process, indicating a fracture of the **petrous part of the temporal bone** (Middle Cranial Fossa). 4. **Raccoon Eyes:** Periorbital ecchymosis indicating an anterior cranial fossa fracture. 5. **Management:** Most CSF leaks resolve with conservative management (head elevation, bed rest). Prophylactic antibiotics are generally not recommended.

Q: What is the first priority in managing a severely injured patient with a spinal fracture and unconsciousness?

Airway maintenance. In trauma management, the primary goal is to prevent immediate mortality by following the **ATLS (Advanced Trauma Life Support) protocol**, which prioritizes the **ABCDE** sequence. **1. Why Airway Maintenance is Correct:** The "A" in ABCDE stands for **Airway with Cervical Spine Protection**. In an unconscious patient, the tongue can fall back and obstruct the oropharynx, or the airway may be compromised by blood, vomit, or secretions. Without a patent airway, oxygenation is impossible, leading to rapid brain death. Therefore, establishing a clear airway is the absolute first priority, even in the presence of a spinal fracture. **2. Why the Other Options are Incorrect:** * **Spinal stabilization (B):** While critical, it is performed **simultaneously** with airway management (using manual in-line stabilization). You do not wait to secure the airway until after a collar is applied; the airway takes precedence because hypoxia kills faster than a stable spinal injury. * **GCS scoring (A):** This is part of the "D" (Disability) assessment. It is performed only after the ABCs (Airway, Breathing, Circulation) are stabilized. * **Mannitol infusion (C):** This is a specific treatment for raised ICP. It is considered much later in the management algorithm and only after the primary survey is complete and the patient is hemodynamically stable. **Clinical Pearls for NEET-PG:** * **The Golden Hour:** The first 60 minutes after trauma where prompt intervention significantly reduces mortality. * **Airway Maneuver:** In suspected spinal injury, use the **Jaw Thrust** maneuver instead of Head-Tilt/Chin-Lift to avoid aggravating a cervical fracture. * **Definitive Airway:** If the GCS is **≤ 8**, the patient requires endotracheal intubation ("GCS of 8, intubate").

Q: Which of the following is NOT true regarding silver sulfadiazine used in burns?

Diffuses well through eschar. **Explanation:** Silver sulfadiazine (SSD) is a widely used topical antimicrobial agent for the prevention and treatment of wound sepsis in patients with second- and third-degree burns. **1. Why Option A is the Correct Answer (The "NOT True" Statement):** The primary limitation of silver sulfadiazine is its **poor penetration through burn eschar**. Unlike Mafenide acetate, which diffuses deeply into the eschar to reach the underlying tissue, SSD remains largely on the surface. This makes it less effective for treating established deep-seated infections beneath a thick eschar, though it remains excellent for prophylaxis. **2. Analysis of Other Options:** * **Option B (Causes wound maceration):** SSD is typically formulated in a hydrophilic cream base. This moisture-retentive property can lead to softening and maceration of the surrounding skin and the wound bed. * **Option C (Causes hypertrophic granulation):** Prolonged use of SSD can sometimes stimulate exuberant or hypertrophic granulation tissue, which may occasionally delay the re-epithelialization process. * **Option D (Does not cause pain):** One of the major clinical advantages of SSD over Mafenide acetate is that its application is **painless** and soothing. Mafenide acetate, by contrast, often causes a stinging or burning sensation upon application. **High-Yield Clinical Pearls for NEET-PG:** * **Mafenide Acetate:** Known for excellent eschar penetration but can cause **metabolic acidosis** (due to carbonic anhydrase inhibition). * **Silver Nitrate:** Can cause electrolyte imbalances (hyponatremia, hypochloremia) and stains the dressings/skin black. * **SSD Side Effect:** A common but transient side effect of SSD is **reversible leukopenia** (neutropenia), usually occurring within 2-4 days of starting therapy. * **Contraindication:** Avoid SSD in neonates and near-term pregnancy due to the risk of **kernicterus** (sulfonamide component displaces bilirubin).

Q: In third-degree burns, which of the following findings is typically absent?

Pain. ### Explanation The correct answer is **A. Pain**. **Why Pain is Absent:** Third-degree burns (Full-thickness burns) involve the destruction of the entire epidermis and dermis, extending into the subcutaneous fat [1]. The key anatomical reason for the absence of pain is the **complete destruction of sensory nerve endings** (nociceptors) and cutaneous nerves located within the dermal layer. While the area of the third-degree burn itself is anesthetic (numb) [1], the patient may still experience pain from surrounding first- or second-degree burns. **Analysis of Incorrect Options:** * **B. Vesicles (Blisters):** These are characteristic of **second-degree (partial-thickness) burns**, where fluid accumulates between the epidermis and dermis. In third-degree burns, the tissue is too deeply damaged to form typical fluid-filled vesicles; instead, the surface is dry. * **C. Leathery skin:** This is a hallmark of third-degree burns. The skin becomes tough, inelastic, and "leathery" (often called **eschar**) due to the coagulation of dermal proteins [1]. * **D. Reddish discoloration:** While third-degree burns can appear charred (black) or pearly white, they can also show a dull reddish-brown hue [1]. This is not due to active capillary refill (which is absent) but due to **hemoglobin infiltration** from lysed red blood cells in thrombosed superficial vessels. **High-Yield Clinical Pearls for NEET-PG:** * **Rule of Nines:** Used to estimate the Total Body Surface Area (TBSA) involved in burns. * **Depth Classification:** * *1st Degree:* Epidermis only (e.g., sunburn); painful, no blisters. * *2nd Degree (Superficial):* Painful, blisters present, balances with pressure. * *3rd Degree:* Anesthetic (painless), leathery eschar, no blanching [1]. * **Jackson’s Thermal Zones:** Zone of coagulation (irreversible damage), Zone of stasis (potentially salvageable), and Zone of hyperemia (will recover).

Q: A 3-year-old child suffers from a burn injury involving the face, including the scalp, both buttocks, and circumferentially around both thighs. What is the Total Body Surface Area (TBSA) involved?

0.35. To calculate the Total Body Surface Area (TBSA) in pediatric burns, we must use the **Lund and Browder chart** or the **Modified Rule of Nines**, as children have a larger head-to-body ratio compared to adults. ### **Calculation Breakdown:** * **Face and Scalp (Entire Head):** In a 3-year-old, the head accounts for approximately **15%** (Formula: $19 - \text{age in years}$). Since the question specifies the face *including* the scalp, we calculate the full head surface area. * **Both Buttocks:** Each buttock is **2.5%**, totaling **5%**. * **Both Thighs (Circumferential):** In a 3-year-old, each thigh is approximately **7.5%**. For both thighs, this equals **15%**. * **Total:** $15\% (\text{Head}) + 5\% (\text{Buttocks}) + 15\% (\text{Thighs}) = \mathbf{35\%}$ (or **0.35**). ### **Analysis of Incorrect Options:** * **A (0.25) & B (0.26):** These values underestimate the TBSA by failing to account for the larger surface area of the pediatric head or the circumferential nature of the thigh burns. * **D (0.45):** This overestimates the area, likely by using adult proportions or incorrectly adding the entire lower limb instead of just the thighs. ### **NEET-PG High-Yield Pearls:** 1. **The "Rule of Nines" is inaccurate for children.** Use the Lund-Browder chart for the most accurate assessment. 2. **Pediatric Head Proportions:** At birth, the head is 19%. For every year of age up to 10, subtract 1% from the head and add 0.5% to each leg. 3. **Palmar Method:** The patient’s palm (including fingers) represents roughly **1% TBSA**; this is useful for small or patchy burns. 4. **Fluid Resuscitation:** In pediatrics, the **Parkland Formula** ($4\text{ ml} \times \text{kg} \times \% \text{TBSA}$) is used, but **maintenance fluids** (using the 4-2-1 rule) must be added separately because children have lower glycogen stores.

Question 1

An 8-year-old boy is brought to the emergency room after accidentally touching a hot iron with his forearm. On examination, the burned area has weeping blisters and is very tender to the touch. What is the burn depth?

Accepted Answer

Second degree

Answer

First degree

Answer

Third degree

Answer

Fourth degree

Question 2

High voltage contact burn is considered:

Accepted Answer

Full thickness

Answer

Deep partial thickness

Answer

Superficial burn

Answer

All of the above

Question 3

A five-year-old child presents to the emergency department with burns. What percentage of Body Surface Area (BSA) does a burn area corresponding to the size of his palm represent?

Accepted Answer

1% BSA

Answer

5% BSA

Answer

10% BSA

Answer

20% BSA

Question 4

What is the treatment of choice for a linear, non-displaced fracture of the body of the mandible in a patient with a full complement of teeth?

Accepted Answer

Interdental fixation

Answer

Kirschner wire

Answer

Circumferential wiring

Answer

External pin fixation

Question 5

A man sustained an injury and presented with fluid coming out through his nose. What could be the possible fracture?

Accepted Answer

Fracture base of skull

Answer

Fracture of mandible

Answer

Fracture of maxilla

Answer

None of the above

Question 6

What is the first priority in managing a severely injured patient with a spinal fracture and unconsciousness?

Accepted Answer

Airway maintenance

Answer

Glasgow Coma Scale (GCS) scoring

Answer

Spinal stabilization with a cervical collar

Answer

Mannitol infusion to decrease intracranial pressure (ICP)

Question 7

Which of the following is NOT true regarding silver sulfadiazine used in burns?

Accepted Answer

Diffuses well through eschar

Answer

Causes wound maceration

Answer

Causes hypertrophic granulation

Answer

Does not cause pain

Question 8

All of the following are true about the CRASH-2 trial except:

Accepted Answer

Tranexamic acid reduces the risk of mortality from bleeding in blunt trauma but not in penetrating trauma.

Answer

The dose of tranexamic acid is 1 gm IV over 10 minutes followed by 1 gm over 8 hours.

Answer

It is given to all trauma patients suspected to have significant hemorrhage, including those with SBP <110 mm Hg or PR >110/min.

Answer

It should be administered within 3 hours of injury.

Question 9

In third-degree burns, which of the following findings is typically absent?

Accepted Answer

Pain

Answer

Vesicles

Answer

Leathery skin

Answer

Reddish discoloration due to hemoglobin infiltration

Question 10

A 3-year-old child suffers from a burn injury involving the face, including the scalp, both buttocks, and circumferentially around both thighs. What is the Total Body Surface Area (TBSA) involved?

Accepted Answer

0.35

Answer

0.25

Answer

0.26

Answer

0.45

Trauma — MCQs

Trauma — MCQs

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