Trauma Practice Questions

Q: The TRISS methodology includes all of the following components except?

Urine output. The **TRISS (Trauma and Injury Severity Score)** methodology is the international standard used to predict the probability of survival ($P_s$) in trauma patients. It combines anatomical and physiological parameters to provide a comprehensive outcome analysis. ### **Why "Urine Output" is the Correct Answer** Urine output is a clinical indicator of renal perfusion and shock status, but it is **not** a component of the TRISS formula. TRISS relies on static anatomical data (ISS), dynamic physiological data (RTS), and demographic data (Age). ### **Analysis of Other Options** * **Injury Severity Score (ISS):** This represents the **anatomical** component. It is calculated by summing the squares of the highest Abbreviated Injury Scale (AIS) scores in the three most severely injured body regions. * **Revised Trauma Score (RTS):** This represents the **physiological** component. It is calculated using three parameters: Glasgow Coma Scale (GCS), Systolic Blood Pressure (SBP), and Respiratory Rate (RR). * **Patient's Age:** Age is a critical prognostic factor. In TRISS, age is treated as a binary variable: patients are categorized as either $<55$ years or $\geq 55$ years. ### **High-Yield Clinical Pearls for NEET-PG** * **The Formula:** $P_s = 1 / (1 + e^{-b})$, where '$b$' is derived from a regression equation: $b = w + (f_1 \times \text{RTS}) + (f_2 \times \text{ISS}) + (f_3 \times \text{Age Index})$. * **Mechanism of Injury:** TRISS uses different coefficients ($w, f_1, f_2, f_3$) depending on whether the trauma is **Blunt** or **Penetrating**. * **Limitation:** TRISS does not account for pre-existing comorbidities (except age) or the cumulative effect of multiple injuries in the same body region. * **ASCOT:** The "Addressed Severity Characterization of Trauma" is a newer system intended to improve upon TRISS by including more detailed age categories and specific injury profiles.

Q: Bucket handle type of fractures are typically seen in which population group?

Edentulous persons. **Explanation:** The correct answer is **Edentulous persons**. **Why Edentulous Persons?** In the context of maxillofacial trauma, a "bucket handle" fracture refers to **bilateral fractures of the body of the mandible** in an edentulous (toothless) patient. In these individuals, the mandible undergoes significant alveolar bone resorption, making it thin and atrophic. When a bilateral fracture occurs, the anterior segment of the mandible is displaced downwards and backwards by the action of the geniohyoid and genioglossus muscles. This displacement resembles the movement of a bucket handle. This is a critical clinical scenario because the posterior displacement of the tongue (attached to the genial tubercles) can lead to acute airway obstruction. **Analysis of Incorrect Options:** * **Children:** Pediatric mandibular fractures are more likely to be "Greenstick" fractures due to the high organic content and elasticity of the bone. * **Soldiers:** This group is typically associated with "March fractures" (stress fractures of the metatarsals) due to repetitive loading, or high-velocity ballistic trauma. * **Young Adults:** This demographic most commonly sustains mandibular fractures due to road traffic accidents or assaults, but they usually have dentition that provides structural stability, preventing the specific "bucket handle" displacement pattern. **Clinical Pearls for NEET-PG:** * **Airway Emergency:** The primary concern in a bucket handle fracture is the loss of tongue support, leading to upper airway obstruction. * **Atrophic Mandible:** The risk of this fracture increases as the vertical height of the mandible decreases below 10-15mm. * **Management:** Unlike dentate patients, these are often managed with Gunning splints or internal fixation, as there are no teeth for intermaxillary fixation (IMF).

Q: Lower lip paresthesia occurs in which type of fracture?

Body fracture. **Explanation:** The correct answer is **Body fracture**. This clinical finding is based on the anatomical course of the **Inferior Alveolar Nerve (IAN)**, a branch of the mandibular nerve (V3). 1. **Why Body Fracture is Correct:** The IAN enters the mandible through the mandibular foramen on the medial side of the ramus and travels within the **mandibular canal**, which runs through the body of the mandible. It exits as the **mental nerve** through the mental foramen (typically located between the first and second premolars). A fracture of the mandibular body distal to the mandibular foramen often compresses or lacerates the IAN, leading to anesthesia or paresthesia of the lower lip and chin (the sensory distribution of the mental nerve). 2. **Why Other Options are Incorrect:** * **Symphysis/Parasymphysis fracture:** These occur in the midline or between the canine teeth. While they can occasionally affect the terminal branches of the mental nerve, the nerve is more frequently spared or the injury is localized compared to the direct canal involvement seen in body fractures. * **Coronoid fracture:** This involves the superior-anterior projection of the ramus. The IAN is located much lower and more medial, so it is rarely affected. * **Condyle fracture:** This is the most common site of mandibular fracture. However, because the fracture occurs above the entry point of the IAN into the mandibular foramen, lip sensation remains intact. **High-Yield Clinical Pearls for NEET-PG:** * **Vincent’s Sign:** Paresthesia of the lower lip following a mandibular fracture; it is a pathognomonic sign of a fracture distal to the mandibular foramen. * **Most common site of Mandibular Fracture:** Condyle > Angle > Body. * **Guardsman Fracture:** A midline symphysis fracture combined with bilateral condylar fractures, often caused by a direct blow to the chin.

Q: A patient with a head injury presents with clear nasal discharge from the right nostril while conscious. Non-contrast computed tomography (NCCT) of the head reveals a non-operable injury to the frontobasal area. What is the most appropriate management?

Wait and watch for 4-5 days to allow spontaneous healing.. **Explanation:** The clinical presentation of clear nasal discharge following head trauma is diagnostic of **CSF Rhinorrhea**, resulting from a dural tear and a fracture in the anterior skull base (commonly the cribriform plate or frontal sinus). **1. Why Option A is Correct:** The cornerstone of managing post-traumatic CSF leaks is **conservative management**. Approximately 70–85% of traumatic CSF leaks heal spontaneously within 7–10 days. The initial management involves bed rest with the head elevated (30–45°), avoiding straining (Valsalva maneuvers), and observation. A waiting period of 4–7 days is standard before considering invasive interventions, as most dural defects seal as the brain edema subsides and fibrin deposition occurs. **2. Why Other Options are Incorrect:** * **Option B:** MRI (specifically MR Cisternography) is useful for localizing a persistent leak but is not indicated in the acute phase before a trial of conservative management. * **Option C:** Lumbar drains (dural catheters) are second-line treatments used if the leak persists beyond the initial observation period; they are not the immediate first step. * **Option D:** Surgical repair (transcranial or endoscopic) is reserved for "non-healing" leaks (usually persisting >7–14 days), cases of meningitis, or large intracranial complications. **Clinical Pearls for NEET-PG:** * **Diagnosis:** The "Target sign" or "Halo sign" on bedsheets and a **Beta-2 Transferrin test** (most specific) confirm CSF. * **Imaging:** High-resolution CT (HRCT) of the paranasal sinuses is the gold standard for locating the bony defect. * **Prophylaxis:** Routine use of prophylactic antibiotics is **not recommended** as it does not prevent meningitis and may select for resistant organisms. * **Glucose:** CSF glucose >40 mg/dL (or >60% of blood glucose) helps differentiate it from allergic rhinitis.

Q: Which of the following is true regarding superficial burns?

Can be healed within 7 to 10 days. ### Explanation **Correct Answer: D. Can be healed within 7 to 10 days** **1. Understanding the Concept** Superficial burns (specifically **First-degree burns** and **Superficial Partial-thickness burns**) involve the epidermis and potentially the superficial papillary dermis. Because the basal layer of the epidermis or the skin appendages (hair follicles, sweat glands) remain intact, these burns possess excellent regenerative capacity. They typically heal through spontaneous epithelialization within **7 to 10 days** (for first-degree) or **10 to 14 days** (for superficial partial-thickness) without significant scarring. **2. Analysis of Incorrect Options** * **A. Always requires skin grafting:** Incorrect. Superficial burns heal spontaneously. Skin grafting is reserved for **Full-thickness (3rd degree)** or deep partial-thickness burns that cannot re-epithelialize on their own. * **B. Dry and inelastic:** Incorrect. This describes **Full-thickness burns** (eschar). Superficial burns are typically moist, erythematous, and blanch on pressure due to intact capillary refill. * **C. Blister formation:** While blisters are a hallmark of **Partial-thickness (2nd degree)** burns, they are *not* a feature of simple **Superficial (1st degree)** burns (e.g., classic sunburn). Since the question asks generally about "superficial burns" and Option D is a definitive physiological timeline, D is the most accurate clinical characteristic. **3. NEET-PG High-Yield Pearls** * **Pain:** Superficial burns are **exquisitely painful** because nerve endings are exposed but intact. * **Rule of 9s (Wallace):** Used to estimate Total Body Surface Area (TBSA) in adults. * **Parkland Formula:** $4 \text{ mL} \times \text{Weight (kg)} \times \% \text{ TBSA}$ (Give half in first 8 hours). * **Jackson’s Zones of Burn:** Zone of Coagulation (necrosis), Zone of Stasis (potentially salvageable), and Zone of Hyperemia (will recover).

Q: Which sign is found in splenic injury?

Splenic injury. **Explanation:** The question refers to **Kehr’s Sign**, a classic clinical finding associated with **splenic injury**. **1. Why Splenic Injury is Correct:** Kehr’s sign is defined as **referred pain in the left shoulder** caused by the presence of blood or irritants in the peritoneal cavity. In the context of splenic rupture, blood accumulates under the left diaphragm, irritating the **phrenic nerve (C3-C5)**. Since the supraclavicular nerves (which supply the shoulder) share the same nerve roots (C3, C4), the brain perceives the pain as originating from the shoulder. It is most prominent when the patient is in the Trendelenburg position or when the left upper quadrant is palpated. **2. Why Other Options are Incorrect:** * **Perforative Peritonitis:** While this causes generalized abdominal rigidity and guarding (and occasionally shoulder pain if air collects under the diaphragm), it is not the classic association for Kehr’s sign. * **Mesenteric Vascular Occlusion:** This typically presents with "pain out of proportion to physical findings" and metabolic acidosis, rather than specific referred shoulder pain. * **Gastric Volvulus:** This is characterized by **Borchardt’s Triad** (epigastric pain, inability to vomit, and inability to pass a nasogastric tube), not Kehr’s sign. **3. NEET-PG High-Yield Pearls:** * **Ballance’s Sign:** Fixed dullness in the left flank and shifting dullness in the right flank (indicative of splenic hematoma/rupture). * **Organ Involvement:** The spleen is the **most commonly injured organ** in blunt abdominal trauma. * **Investigation of Choice:** **CECT Abdomen** is the gold standard for hemodynamically stable patients; **FAST** is used for unstable patients. * **Grading:** Splenic injuries are graded I–V using the AAST scale; Grade V represents a completely shattered spleen or hilar vascular injury.

Question 1

The TRISS methodology includes all of the following components except?

Accepted Answer

Urine output

Answer

Injury Severity Score (ISS)

Answer

Revised Trauma Score (RTS)

Answer

Patient's age

Question 2

Bucket handle type of fractures are typically seen in which population group?

Accepted Answer

Edentulous persons

Answer

Children

Answer

Soldiers

Answer

Young adults

Question 3

Lower lip paresthesia occurs in which type of fracture?

Accepted Answer

Body fracture

Answer

Symphysis fracture

Answer

Coronoid fracture

Answer

Condyle fracture

Question 4

A patient with a head injury presents with clear nasal discharge from the right nostril while conscious. Non-contrast computed tomography (NCCT) of the head reveals a non-operable injury to the frontobasal area. What is the most appropriate management?

Accepted Answer

Wait and watch for 4-5 days to allow spontaneous healing.

Answer

Perform an MRI to localize the leak and control the discharge endoscopically.

Answer

Insert a dural catheter to control the cerebrospinal fluid (CSF) leak.

Answer

Proceed with a transcranial approach to repair the damaged frontobasal region.

Question 5

Tension pneumothorax due to a fractured rib is treated by?

Accepted Answer

Tube drainage

Answer

Strapping

Answer

Intermittent positive pressure ventilation (IPPV)

Answer

Internal fixation with open reduction

Question 6

In a 60 kg man with 40% burns, what is the amount of Ringer's lactate given in the first 8 hours?

Accepted Answer

4800 ml

Answer

9600 ml

Answer

6400 ml

Answer

3200 ml

Question 7

Which of the following is true regarding superficial burns?

Accepted Answer

Can be healed within 7 to 10 days

Answer

Always requires skin grafting

Answer

Dry and inelastic

Answer

Blister formation

Question 8

Intracranial tension is decreased by all of the following methods EXCEPT?

Accepted Answer

ICT monitoring

Answer

Craniotomy

Answer

Tumor removal

Answer

CSF removal

Question 9

Which sign is found in splenic injury?

Accepted Answer

Splenic injury

Answer

Perforative peritonitis

Answer

Mesenteric vascular occlusion

Answer

Gastric volvulus

Question 10

Which of the following statements about flail chest is FALSE?

Accepted Answer

Mechanical ventilation is always needed

Answer

Involves 3 or more contiguous ribs in at least 2 locations

Answer

Chest wall moves inwards during inspiration

Answer

Can lead to respiratory failure

Trauma — MCQs

Trauma — MCQs

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