Trauma Practice Questions

Q: The Parkland formula for burns is primarily used to calculate the fluid resuscitation needs, typically with which type of intravenous fluid?

Ringer's lactate. The **Parkland formula** is the most widely used guideline for initial fluid resuscitation in burn patients. The correct answer is **Ringer’s Lactate (RL)** because it is a balanced crystalloid that closely mimics the electrolyte composition of human plasma. ### Why Ringer’s Lactate is the Gold Standard: In major burns, there is a massive systemic inflammatory response leading to "capillary leak," resulting in the loss of water and electrolytes into the interstitial space. RL is preferred because: 1. **Prevents Hyperchloremic Acidosis:** Unlike Normal Saline, RL has a lower chloride concentration, reducing the risk of metabolic acidosis. 2. **Buffering Capacity:** The lactate in RL is metabolized by the liver into bicarbonate, which helps counteract the metabolic acidosis often seen in burn shock. ### Why Other Options are Incorrect: * **Normal Saline (0.9% NaCl):** Contains high levels of chloride (154 mEq/L). Large volumes can lead to hyperchloremic metabolic acidosis and may worsen renal perfusion. * **Glucose Saline / 25% Dextrose:** Glucose-containing fluids are avoided in the first 24 hours of adult burn resuscitation because the stress response causes endogenous hyperglycemia. Dextrose can cause osmotic diuresis, which makes "urine output" an unreliable indicator of fluid resuscitation. ### High-Yield Clinical Pearls for NEET-PG: * **The Formula:** Total fluid in 24 hours = **4 mL × Body Weight (kg) × % Total Body Surface Area (TBSA) burned.** * **Administration:** Give **half** of the calculated volume in the first **8 hours** (from the time of injury, not arrival) and the remaining half over the next 16 hours. * **Monitoring:** The best indicator of adequate fluid resuscitation is **Urine Output** (Target: 0.5 mL/kg/hr in adults; 1 mL/kg/hr in children). * **Modified Brooke Formula:** Uses 2 mL/kg/% TBSA instead of 4 mL.

Q: What is the primary aim of an abbreviated laparotomy?

To ensure adequate haemostasis. **Explanation:** The primary aim of an **abbreviated laparotomy**, also known as **Damage Control Surgery (DCS)**, is to rapidly control life-threatening hemorrhage and limit gastrointestinal contamination. This approach is utilized in critically ill trauma patients who are physiological exhausted and at risk of the "Lethal Triad" (acidosis, hypothermia, and coagulopathy). **1. Why Option D is Correct:** In the setting of severe trauma, the goal is not definitive anatomical repair but **physiological restoration**. Ensuring **adequate haemostasis** (via packing, shunting, or simple ligation) is the most critical step to stop the "bloody vicious cycle." By quickly controlling bleeding and contamination, the surgeon can terminate the operation early to allow the patient to be stabilized in the ICU. **2. Why Other Options are Incorrect:** * **Option A:** While sterile technique is maintained, abbreviated laparotomy actually carries a *higher* risk of infection due to the use of temporary abdominal closures and intra-abdominal packing. * **Option B:** These patients are critically ill and often kept sedated/paralyzed in the ICU; early ambulation is not a priority in the acute damage control phase. * **Option C:** The abdomen is often left open with a temporary dressing (e.g., Bogota bag or VAC); primary wound healing is intentionally delayed until the patient is stable enough for a "re-look" surgery. **High-Yield Clinical Pearls for NEET-PG:** * **The Lethal Triad:** Hypothermia, Acidosis, and Coagulopathy. DCS aims to interrupt this cycle. * **Stages of Damage Control:** 1. **Part I:** Abbreviated laparotomy (Haemostasis & Contamination control). 2. **Part II:** ICU resuscitation (Rewarming & Correction of coagulopathy). 3. **Part III:** Planned re-operation for definitive repair. * **Indications:** pH 10 units).

Q: Which of the following is NOT typically seen in a midface fracture?

Facial shortening. In midface fractures, particularly **Le Fort II and III** types, the anatomical hallmark is **facial lengthening**, not shortening. This occurs because the midface complex is separated from the cranial base and displaced **downward and backward** due to the pull of the pterygoid muscles and the force of gravity. This displacement creates a characteristic "donkey face" or "dish-face" appearance. **Explanation of Options:** * **Facial Shortening (Correct Answer):** This is incorrect because the midface drops inferiorly. Facial shortening is more characteristic of mandibular fractures with significant vertical displacement or specific types of impacted zygomatic fractures, but not classic Le Fort midface injuries. * **Facial Lengthening:** As the fractured segment separates from the skull base and slides down the inclined plane of the sphenoid bone, the vertical height of the face increases. * **Dental Malocclusion:** This is a cardinal sign of midface fractures. The posterior displacement of the maxilla leads to an **"anterior open bite,"** where the posterior teeth meet prematurely, preventing the front teeth from closing. * **CSF Rhinorrhea:** Because Le Fort II and III fractures involve the ethmoid bone and the cribriform plate, dural tears are common, leading to the leakage of cerebrospinal fluid through the nose. **High-Yield Clinical Pearls for NEET-PG:** * **Guerin’s Sign:** Ecchymosis in the region of the greater palatine vessels (seen in Le Fort I). * **Panda Sign/Raccoon Eyes:** Periorbital ecchymosis associated with Le Fort II/III or basilar skull fractures. * **Battle’s Sign:** Post-auricular ecchymosis indicating a fracture of the posterior cranial fossa/petrous temporal bone. * **Dish-face Deformity:** Specifically refers to the concave facial profile seen in Le Fort III fractures due to the recession of the midface.

Q: In a case of acute trauma, what is the best guideline for quick replacement of fluids?

Urine Output. **Explanation:** In the management of acute trauma and hemorrhagic shock, **Urine Output (UOP)** is considered the most reliable and practical bedside indicator for the adequacy of fluid resuscitation. **Why Urine Output is the Correct Answer:** Urine output serves as a direct surrogate for **renal perfusion** and, by extension, global tissue perfusion and cardiac output. In trauma, the body compensates for volume loss by diverting blood away from non-essential organs (like the kidneys) to the heart and brain. A steady urine output of **0.5 ml/kg/hr in adults** (or 1 ml/kg/hr in children) indicates that the kidneys are being adequately perfused, signifying that the circulating volume has been sufficiently restored. **Why Other Options are Incorrect:** * **Pulse (A):** While tachycardia is an early sign of shock, it is non-specific. It can be influenced by pain, anxiety, or medications (e.g., beta-blockers), making it an unreliable guide for the *titration* of fluid replacement. * **Hemoglobin (B):** In acute trauma, hemoglobin levels do not drop immediately because the patient loses whole blood (both cells and plasma). It takes hours for compensatory fluid shifts or resuscitation fluids to dilute the blood and reflect a drop in Hb. * **Central Venous Pressure (D):** CVP measures right atrial pressure. While it can help assess fluid status, it is an invasive procedure and can be misleading in cases of obstructive shock (e.g., tension pneumothorax or cardiac tamponade), which are common in trauma. **Clinical Pearls for NEET-PG:** * **Target UOP:** Adults: 0.5 ml/kg/hr; Children: 1 ml/kg/hr; Infants (<1 year): 2 ml/kg/hr. * **Class of Shock:** Significant drop in UOP is typically seen in **Class III Hemorrhage** (30-40% blood loss). * **Golden Rule:** If a trauma patient is not producing urine despite fluid boluses, the first step is to rule out urethral injury or a blocked catheter before assuming persistent shock.

Q: Which of the following is NOT a sign of cerebral compression?

Hypotension. The correct answer is **Hypotension**. ### **Explanation** Cerebral compression occurs when intracranial pressure (ICP) rises due to space-occupying lesions (like hematomas or edema). The physiological response to increased ICP is governed by the **Cushing’s Reflex**, which consists of a classic triad: 1. **Hypertension** (Widening pulse pressure): The body raises systemic blood pressure to maintain Cerebral Perfusion Pressure (CPP). 2. **Bradycardia**: A reflex response to the sudden rise in systemic blood pressure. 3. **Irregular Respiration**: Due to brainstem compression. Therefore, **Hypertension**, not hypotension, is a sign of cerebral compression. Hypotension in a head injury patient usually suggests internal hemorrhage elsewhere (e.g., abdomen or thorax) rather than the brain injury itself. ### **Analysis of Other Options** * **Bradycardia:** Part of the Cushing’s triad; it occurs as a compensatory baroreceptor response to systemic hypertension. * **Papilloedema:** A classic sign of chronic or subacute increased ICP caused by the mechanical compression of the optic nerve sheath. * **Vomiting:** Specifically "projectile vomiting" without preceding nausea, caused by direct pressure on the postrema area in the medulla. ### **High-Yield Clinical Pearls for NEET-PG** * **Cerebral Perfusion Pressure (CPP) Formula:** $CPP = MAP - ICP$. To keep CPP constant when ICP rises, the Mean Arterial Pressure (MAP) must increase. * **Earliest Sign of Compression:** Altered level of consciousness (GCS) or an ipsilateral dilated pupil (due to 3rd nerve compression). * **Late Sign:** Cushing’s Triad is often a late/pre-terminal sign indicating impending transtentorial herniation. * **Management:** Mannitol (20%), hypertonic saline, and head elevation (30°) are used to reduce ICP.

Q: Which of the following statements are true regarding pancreatic trauma?

Amylase is elevated in 90% of cases. **Explanation:** Pancreatic trauma is relatively rare due to the organ's retroperitoneal location, but it carries high morbidity and mortality. **1. Why Option D is Correct:** Serum amylase levels are elevated in approximately **90% of pancreatic trauma cases**. However, it is a high-yield point to remember that amylase is **not specific** (can rise in bowel injury) and its initial level does not correlate with the severity of the injury. A persistently rising amylase level is more clinically significant than a single baseline value. **2. Why the Other Options are Incorrect:** * **Option A:** Solitary involvement is **uncommon**. Due to the proximity of the liver, spleen, and major vessels (aorta, IVC), pancreatic injury is associated with other intra-abdominal organ injuries in about 90% of cases. * **Option B:** While blunt trauma (e.g., steering wheel injury) is a classic mechanism, **penetrating trauma** (gunshot or stab wounds) is actually the more common cause of pancreatic injury in many clinical series. * **Option C:** Surgery is **not always needed**. Grade I and II injuries (minor contusions or lacerations without ductal involvement) are often managed conservatively. Surgery is primarily indicated for ductal disruption (Grade III+) or hemodynamic instability. **Clinical Pearls for NEET-PG:** * **Mechanism:** The pancreas is often crushed against the vertebral column (L1-L2) in blunt trauma. * **Investigation of Choice:** **CECT abdomen** is the gold standard for stable patients. * **Management Hallmark:** The integrity of the **Main Pancreatic Duct** is the single most important factor determining management and prognosis. * **ERCP:** Useful if CT is equivocal regarding ductal injury. * **Complications:** Pancreatic fistula is the most common complication; pseudocyst and abscess may also occur.

Q: A 14-year-old child presents to the emergency department with a history of blunt abdominal trauma. On examination, Ballance's sign is found to be positive. Which of the following statements is not true?

Splenectomy is required.. **Explanation:** **Ballance’s Sign** is a classic clinical finding associated with **splenic injury** following blunt abdominal trauma. It is characterized by fixed dullness to percussion in the left flank and shifting dullness in the right flank. 1. **Why Option D is the Correct Answer (The "Not True" Statement):** In modern trauma management, especially in the pediatric population (14-year-old in this case), a positive Ballance’s sign does not automatically mandate a **splenectomy**. Most blunt splenic injuries in children are managed via **Non-Operative Management (NOM)** or conservative treatment, provided the patient is hemodynamically stable. Surgery is reserved for hemodynamic instability or failed conservative management. 2. **Analysis of Other Options:** * **Option A:** True. The fixed dullness in the left upper quadrant is due to the presence of a large, clotted **subcapsular or extracapsular hematoma** which does not move with change in position. * **Option B:** True. The sign is specifically caused by the accumulation of blood (hematoma) around the spleen. * **Option C:** True. As mentioned, conservative management (ICU monitoring, serial hemoglobin checks, and bed rest) is the gold standard for stable pediatric splenic trauma to preserve immunological function. **High-Yield Clinical Pearls for NEET-PG:** * **Kehr’s Sign:** Referred pain to the left shoulder due to diaphragmatic irritation by splenic blood (Phrenic nerve, C3-C5). * **Saegesser’s Sign:** Tenderness upon pressure over the left phrenic nerve in the neck. * **Investigation of Choice:** **CECT Abdomen** is the gold standard for grading splenic injury in stable patients. * **Oversedation Risk:** Post-splenectomy patients are at risk for **OPSI** (Overwhelming Post-Splenectomy Infection), primarily by encapsulated organisms (*S. pneumoniae, H. influenzae, N. meningitidis*).

Q: A severely injured patient with multiple injuries is brought to the casualty. After primary survey and stabilization, what is the preferred investigation?

Whole body CT with IV contrast. ### Explanation **Correct Option: A (Whole body CT with IV contrast)** In a hemodynamically stable patient with multiple injuries (polytrauma), **Whole Body CT (WBCT)**—often referred to as "Pan-scan"—is now the gold standard. The underlying concept is the **"Golden Hour"** management, where rapid, definitive diagnosis of all life-threatening injuries is crucial. WBCT with IV contrast (covering head, neck, chest, abdomen, and pelvis) is faster and more sensitive than a piecemeal approach. It significantly reduces the time to definitive treatment and has been shown to improve survival rates in severely injured patients compared to selective imaging. **Why other options are incorrect:** * **Option B:** This represents a selective imaging approach. It may miss occult injuries in the thorax or pelvis, which are common in high-energy trauma. * **Option C & D:** These options rely on **FAST (Focused Assessment with Sonography for Trauma)** and X-rays. While FAST is excellent for unstable patients in the primary survey, it is less sensitive than CT for detecting retroperitoneal injuries, solid organ lacerations, or hollow viscus injuries in a stable patient. X-rays of the C-spine have largely been replaced by CT due to the latter’s superior sensitivity for fractures. **Clinical Pearls for NEET-PG:** * **Prerequisite for CT:** The patient **must be hemodynamically stable**. If the patient is unstable, the priority is resuscitation and immediate surgical intervention (e.g., Laparotomy) or bedside FAST/X-ray. * **Contrast:** IV contrast is essential for WBCT to evaluate vascular injuries and solid organ (liver/spleen) grading. * **Sequence:** A typical WBCT protocol includes a non-contrast CT head followed by contrast-enhanced CT from the neck to the pubic symphysis.

Question 1

A 38-year-old male patient presents after a road traffic accident with multiple rib fractures, tenderness in the left chest wall and left hypochondrium, guarding, and rigidity. X-ray shows free fluid in the abdomen. What is the most likely diagnosis?

Accepted Answer

Splenic injury

Answer

Liver injury

Answer

Lung injury

Answer

Diaphragmatic injury

Question 2

The Parkland formula for burns is primarily used to calculate the fluid resuscitation needs, typically with which type of intravenous fluid?

Accepted Answer

Ringer's lactate

Answer

Glucose saline

Answer

Normal saline

Answer

25% dextrose

Question 3

What is the primary aim of an abbreviated laparotomy?

Accepted Answer

To ensure adequate haemostasis

Answer

To decrease the chance of infection

Answer

To facilitate early ambulation

Answer

To promote early wound healing

Question 4

Which of the following is NOT typically seen in a midface fracture?

Accepted Answer

Facial shortening

Answer

Facial lengthening

Answer

Dental malocclusion

Answer

Cerebrospinal fluid (CSF) rhinorrhea

Question 5

In a case of acute trauma, what is the best guideline for quick replacement of fluids?

Accepted Answer

Urine Output

Answer

Pulse

Answer

Hemoglobin

Answer

Central Venous Pressure (CVP)

Question 6

Which of the following is NOT a sign of cerebral compression?

Accepted Answer

Hypotension

Answer

Bradycardia

Answer

Papilloedema

Answer

Vomiting

Question 7

Tension pneumothorax results in all of the following except?

Accepted Answer

Respiratory alkalosis

Answer

Decreased cardiac output

Answer

Decreased venous return

Answer

Absent breath sounds

Question 8

Which of the following statements are true regarding pancreatic trauma?

Accepted Answer

Amylase is elevated in 90% of cases

Answer

Solitary involvement is common

Answer

Blunt injury is the usual cause

Answer

Surgery is always needed

Question 9

A 14-year-old child presents to the emergency department with a history of blunt abdominal trauma. On examination, Ballance's sign is found to be positive. Which of the following statements is not true?

Accepted Answer

Splenectomy is required.

Answer

A palpable tender mass can be felt in the left upper quadrant with persistent dullness.

Answer

It is due to an extracapsular or subcapsular hematoma of the spleen.

Answer

It is managed with conservative treatment.

Question 10

A severely injured patient with multiple injuries is brought to the casualty. After primary survey and stabilization, what is the preferred investigation?

Accepted Answer

Whole body CT with IV contrast

Answer

CT head, abdomen, and X-ray of suspected limb fractures

Answer

CT head, FAST scan, with X-ray of C-spine and pelvis

Answer

CT head and neck, FAST scan of chest, and pelvis X-ray

Trauma — MCQs

Trauma — MCQs

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