Trauma Practice Questions

Q: What organ is most commonly damaged in a penetrating injury of the abdomen?

Liver. **Explanation:** In abdominal trauma, the frequency of organ injury depends significantly on the **mechanism of injury** (blunt vs. penetrating). **1. Why Liver is Correct:** The **liver** is the most commonly injured organ in **penetrating abdominal trauma** (stab wounds and gunshot wounds) due to its large surface area and fixed position in the right upper quadrant. While the small intestine is frequently involved, current surgical literature and standard textbooks (like Bailey & Love and Sabiston) identify the liver as the most frequently damaged solid organ in overall penetrating trauma. **2. Why the other options are incorrect:** * **Small Intestine:** This is the second most commonly injured organ in penetrating trauma. However, it is the **most common** organ injured specifically in **gunshot wounds (GSW)** due to its multiple redundant loops filling the abdominal cavity. * **Large Intestine:** While frequently injured in high-velocity penetrating trauma, it is less common than the liver or small bowel. * **Duodenum:** Due to its retroperitoneal location, the duodenum is relatively protected and is one of the least commonly injured organs in trauma. **Clinical Pearls for NEET-PG:** * **Blunt Trauma Abdomen (BTA):** The **Spleen** is the most commonly injured organ overall. * **Penetrating Trauma (Overall):** **Liver** is the most common. * **Gunshot Wounds (GSW):** **Small Intestine** is the most common. * **Stab Wounds:** **Liver** is the most common. * **Seat-belt Injury:** Most commonly associated with **Small Bowel** (mesenteric tear) or **Chance fracture** of the spine. * **Kehr’s Sign:** Referred pain to the left shoulder, classic for splenic rupture.

Q: In a patient with a partial-thickness burn, what percentage of the body surface area warrants referral to a burn center?

Burn > 10% of body surface area. **Explanation:** The American Burn Association (ABA) has established specific criteria for referral to a specialized burn center to ensure optimal outcomes for complex injuries. For **partial-thickness (second-degree) burns**, referral is indicated when the injury involves **more than 10% of the Total Body Surface Area (TBSA)**. **Why Option D is correct:** Partial-thickness burns exceeding 10% TBSA carry a significant risk of fluid shifts, metabolic derangements, and potential infection that require specialized multidisciplinary care. In pediatric and geriatric populations, these risks are even more pronounced, making early referral critical. **Why other options are incorrect:** * **Options A, B, and C:** While burns of 15%, 25%, or 30% certainly require specialized care, they represent much larger injuries. The threshold for referral is set lower (at 10%) to capture patients before they develop severe systemic complications. Waiting for a 25-30% TBSA threshold would delay necessary specialized intervention. **High-Yield Clinical Pearls for NEET-PG:** * **Other ABA Referral Criteria:** * Any **Full-thickness (third-degree)** burns. * Burns involving **special areas**: Face, hands, feet, genitalia, perineum, or major joints. * **Chemical** and **Electrical** burns (including lightning). * **Inhalation injury**. * Burns in patients with pre-existing medical comorbidities or concomitant trauma. * **Rule of Nines:** Remember that in adults, the head is 9% and each leg is 18%. In infants, the head is 18% and each leg is 14%. * **Lund and Browder Chart:** This is the most accurate method for calculating TBSA in children as it accounts for changes in body proportions with age.

Q: Guerin's sign is associated with which of the following findings?

Ecchymosis at the greater palatine foramen. **Explanation:** **Guerin’s sign** is a classic clinical indicator of a **Le Fort I fracture** (horizontal maxillary fracture). It refers to ecchymosis (bruising) observed in the region of the **greater palatine foramen**. This occurs because the fracture line in Le Fort I passes through the lateral antral wall and the pterygoid plates, leading to the rupture of the greater palatine vessels and subsequent extravasation of blood into the palatal mucosa. **Analysis of Options:** * **Option A (Correct):** Ecchymosis at the greater palatine foramen is the defining feature of Guerin’s sign, specific to Le Fort I fractures. * **Option B (Incorrect):** Ecchymosis over the mastoid process is known as **Battle’s sign**, which indicates a fracture of the **posterior cranial fossa** (base of skull). * **Option C (Incorrect):** Ecchymosis in the condylar region is typically associated with mandibular fractures or localized trauma to the temporomandibular joint (TMJ). * **Option D (Incorrect):** While infraorbital ecchymosis (and infraorbital nerve anesthesia) is common in **Le Fort II and III fractures**, it is not referred to as Guerin’s sign. **Clinical Pearls for NEET-PG:** * **Le Fort I:** Floating palate; Guerin’s sign is the hallmark. * **Le Fort II (Pyramidal):** Involves the infraorbital margin; presents with **step-off deformity** and infraorbital anesthesia. * **Le Fort III (Craniofacial disjunction):** Involves the zygomatic arch; presents with **"Dish-face" deformity** and lengthening of the face. * **Panda Sign/Raccoon Eyes:** Periorbital ecchymosis indicating a fracture of the **anterior cranial fossa**.

Q: A patient presents following a motor vehicle accident. The patient moans intermittently, opens eyes only to pain, exhibits no movement in the right limb but moves the left limb in response to pain, and both legs are held in extension. What is the Glasgow Coma Scale (GCS) score?

9. ### Explanation The Glasgow Coma Scale (GCS) is a critical tool in trauma management for assessing the level of consciousness. It is calculated by summing the scores of three components: **Eye Opening (E), Verbal Response (V), and Motor Response (M).** **Step-by-Step Calculation for this Patient:** 1. **Eye Opening (E):** The patient opens eyes only to pain. **Score = 2.** 2. **Verbal Response (V):** The patient moans intermittently (incomprehensible sounds). **Score = 2.** 3. **Motor Response (M):** The patient exhibits asymmetrical movement. In GCS scoring, we always use the **best motor response**. While the right limb is immobile and legs are in extension (decerebrate), the left limb moves in response to pain (withdrawal/flexion). **Score = 5 (Withdraws from pain) or 4 (Flexion withdrawal).** * *Note:* Standard NEET-PG interpretations often classify "moves limb to pain" as **Withdrawal (M4)** or **Localizing (M5)** depending on the specificity. To reach the correct answer of **9**, the breakdown is **E2 + V2 + M5 = 9**. **Why other options are incorrect:** * **Option A (5):** This would imply a much deeper coma, such as E1, V1, M3 (Abnormal flexion). * **Option B (7):** This would occur if the patient had a lower motor score (e.g., M3 - Decorticate posturing). * **Option D (11):** This would require the patient to be oriented or following commands, which is not the case here. --- ### High-Yield Clinical Pearls for NEET-PG * **The "Best" Rule:** Always score the **best** response from any limb to determine the Motor score. * **GCS Classification:** * Severe Head Injury: GCS ≤ 8 (Indicative for Intubation: "8, Intubate") * Moderate: 9–12 * Mild: 13–15 * **Modified GCS:** In the latest updates, "Pain" is replaced by "Pressure" and "Incomprehensible sounds" by "Sounds." * **Minimum/Maximum:** The minimum score is 3 (not 0), and the maximum is 15.

Q: What is the initial method to prevent infection in burn patients?

Hand washing. ### Explanation The primary cause of morbidity and mortality in burn patients who survive the initial 48 hours is **sepsis**. The correct answer is **Hand washing** because it is the single most effective and simplest measure to prevent the transmission of nosocomial (hospital-acquired) pathogens. #### Why Hand Washing is Correct: Burn patients lose their primary protective barrier (the skin), making them highly susceptible to environmental bacteria. Most infections in burn units are transmitted via the **hands of healthcare workers**. Strict hand hygiene protocols significantly reduce the cross-contamination of multi-drug resistant organisms like *Pseudomonas aeruginosa* and *MRSA*. #### Why Other Options are Incorrect: * **Intravenous Antibiotics:** Prophylactic systemic antibiotics are **not recommended** in the initial management of burns. They do not prevent wound sepsis but instead increase the risk of developing fungal infections and promoting antibiotic resistance. * **Topical Antibiotics:** While agents like Silver Sulfadiazine or Mafenide Acetate are crucial for controlling bacterial colonization on the wound, they are considered secondary to strict aseptic techniques and hand hygiene. * **Physiotherapy:** This is essential for preventing contractures and maintaining joint mobility, but it plays no direct role in initial infection control. #### NEET-PG Clinical Pearls: * **Most common cause of early burn wound infection:** *Staphylococcus aureus*. * **Most common cause of late/severe burn wound infection:** *Pseudomonas aeruginosa*. * **Gold standard for diagnosing burn wound sepsis:** Wound biopsy showing >10⁵ organisms per gram of tissue with evidence of invasion into healthy tissue. * **Silver Sulfadiazine (Silvadene):** Most commonly used topical agent; can cause transient **neutropenia**. * **Mafenide Acetate (Sulfamylon):** Penetrates eschar well but can cause **metabolic acidosis** (carbonic anhydrase inhibition).

Question 1

Rupture of membranous urethra is more commonly due to which of the following factors?

Accepted Answer

Fixity of urethra

Answer

Thin supported wall

Answer

Angulation

Answer

Proximity to bladder

Question 2

What organ is most commonly damaged in a penetrating injury of the abdomen?

Accepted Answer

Liver

Answer

Small intestine

Answer

Large intestine

Answer

Duodenum

Question 3

Neurogenic shock in acute spinal injury is due to?

Accepted Answer

Loss of sympathetic tone

Answer

Loss of parasympathetic tone

Answer

Increased heart rate

Answer

Vasovagal attack

Question 4

A post-operative cardiac surgical patient developed sudden hypotension, raised central venous pressure, and pulsus paradoxus at the 4th post-operative hour. What is the most probable diagnosis?

Accepted Answer

Tension Pneumothorax

Answer

Hemothorax

Answer

Cardiac tamponade

Answer

Flail chest

Question 5

In a patient with a partial-thickness burn, what percentage of the body surface area warrants referral to a burn center?

Accepted Answer

Burn > 10% of body surface area

Answer

Burn > 30% of body surface area

Answer

Burn > 25% of body surface area

Answer

Burn > 15% of body surface area

Question 6

A victim of blunt abdominal trauma has splenic and liver lacerations as well as an unstable pelvic fracture. He is hypotensive and tachycardic with a heart rate of 150 despite receiving 2 L of crystalloid en route to the hospital. He was intubated prior to arrival due to declining mental status. He is taken emergently to the operating room for exploratory laparotomy and external fixation of his pelvic fracture. Which of the following is the best resuscitative strategy?

Accepted Answer

Infusion of packed red blood cells and early administration of fresh-frozen plasma and platelets prior to return of laboratory values

Answer

Infusion of another liter of crystalloid

Answer

Infusion of 500 mL of 5% albumin

Answer

Infusion of packed red blood cells followed by fresh-frozen plasma and platelets as indicated by the PT and platelet counts on laboratory values

Question 7

Guerin's sign is associated with which of the following findings?

Accepted Answer

Ecchymosis at the greater palatine foramen

Answer

Ecchymosis at the mastoid foramen

Answer

Ecchymosis at the condylar region

Answer

Ecchymosis at the infraorbital foramen

Question 8

A patient presents following a motor vehicle accident. The patient moans intermittently, opens eyes only to pain, exhibits no movement in the right limb but moves the left limb in response to pain, and both legs are held in extension. What is the Glasgow Coma Scale (GCS) score?

Accepted Answer

9

Answer

5

Answer

7

Answer

11

Question 9

What is the initial method to prevent infection in burn patients?

Accepted Answer

Hand washing

Answer

Physiotherapy

Answer

Intravenous antibiotics

Answer

Topical antibiotics

Question 10

All of the following are true about pulmonary contusion except:

Accepted Answer

A contusion involving more than 25% of the lung may require intubation.

Answer

May be missed on chest X-ray in up to 20% of cases.

Answer

Effective pain management is important to prevent hypoventilation.

Answer

CT scan is highly sensitive for diagnosis.

Trauma — MCQs

Trauma — MCQs

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