Trauma Practice Questions

Q: A 70-year-old man presents with acute abdominal pain, a pulsating abdominal mass, and shock. What is the most appropriate immediate management?

Perform a CT scan of the abdomen to diagnose the aneurysm.. ### Explanation The clinical triad of **acute abdominal/back pain, a pulsating abdominal mass, and hypotension (shock)** is pathognomonic for a **Ruptured Abdominal Aortic Aneurysm (rAAA)**. **Why Option B is Correct:** In modern vascular surgery protocols, a **CT Angiography (CTA)** of the abdomen is the gold standard for diagnosis. Even in hemodynamically unstable patients, if the diagnosis is in doubt or if the patient can be stabilized briefly, a rapid CT scan is preferred. It confirms the diagnosis, assesses the anatomy for suitability of **Endovascular Aneurysm Repair (EVAR)** versus open repair, and rules out other pathologies. Current guidelines suggest that if a CT can be performed immediately (within minutes), it is the most appropriate next step to plan the surgical approach. **Why Other Options are Wrong:** * **Option A:** While resuscitation is vital, administering 6 units of blood without definitive source control is inadequate. Over-resuscitation can lead to "pop-the-clot" phenomenon, worsening the hemorrhage. * **Options C & D:** While "immediate surgery" was the traditional teaching for unstable patients, modern management emphasizes "Permissive Hypotension" and rapid imaging to determine if the patient is a candidate for EVAR, which has lower perioperative mortality than open laparotomy. **High-Yield Clinical Pearls for NEET-PG:** 1. **Classic Triad:** Pain + Pulsatile Mass + Hypotension (present in only 25-50% of cases). 2. **Permissive Hypotension:** Maintain systolic BP between 70–90 mmHg to prevent dislodging the compensatory clot until the aorta is clamped. 3. **Investigation of Choice:** CT Angiography (CTA). 4. **Screening:** USG is used for screening; CTA is used for surgical planning. 5. **Management:** EVAR is increasingly preferred over open laparotomy if the anatomy is favorable.

Q: Increased central venous pressure (CVP) and pulmonary wedge pressure (PWP) are typically seen in which type of shock?

Cardiogenic shock. ### Explanation The core concept in this question is the differentiation of shock based on hemodynamic parameters. **1. Why Cardiogenic Shock is Correct:** In **Cardiogenic shock**, the primary pathology is pump failure (e.g., Myocardial Infarction). Because the heart cannot effectively eject blood, it "backs up" into the systemic and pulmonary circulation. * **Increased CVP:** Reflects high pressure in the right atrium due to the heart's inability to move blood forward. * **Increased PWP:** Reflects high pressure in the left atrium and pulmonary capillaries. This is a hallmark of cardiogenic shock and distinguishes it from other forms of shock. **2. Why the Other Options are Incorrect:** * **Hypovolemic Shock:** There is a primary loss of fluid/blood volume. This leads to **decreased** CVP and **decreased** PWP because the "tank is empty." * **Neurogenic Shock:** A type of distributive shock where loss of sympathetic tone causes massive vasodilation. This leads to "pooling" of blood in the periphery, resulting in **decreased** CVP and PWP. * **Septic Shock:** Early (hyperdynamic) septic shock involves vasodilation and capillary leak. Similar to neurogenic shock, the CVP and PWP are typically **low or normal**. **3. NEET-PG High-Yield Clinical Pearls:** * **Obstructive Shock:** (e.g., Cardiac Tamponade, Tension Pneumothorax) also presents with **increased CVP**, but PWP may vary. In Tamponade, all diastolic pressures (CVP, PA Diastolic, PWP) tend to equalize. * **The "Cold vs. Warm" Rule:** Cardiogenic and Hypovolemic shock present with cold, clammy extremities (high systemic vascular resistance). Septic and Neurogenic shock often present with warm extremities (low systemic vascular resistance). * **PWP** is the most accurate clinical reflection of **Left Atrial Pressure**.

Q: What is the investigation of choice for diagnosing intra-abdominal bleeding in an unstable patient?

Ultrasound (USG). **Explanation:** The management of abdominal trauma is primarily dictated by the patient's **hemodynamic stability**. **Why Ultrasound (USG) is correct:** In an **unstable patient** (tachycardia, hypotension, or altered sensorium), the goal is a rapid, non-invasive bedside assessment to identify life-threatening hemorrhage. **FAST (Focused Assessment with Sonography for Trauma)** is the investigation of choice. It is highly sensitive for detecting free intraperitoneal fluid (hemoperitoneum) in the Morison’s pouch, splenorenal recess, and pelvis. Its portability allows it to be performed simultaneously with resuscitation without moving the patient. **Why other options are incorrect:** * **CT Scan:** While the "Gold Standard" for identifying specific organ injuries and retroperitoneal bleeds, it is **contraindicated in unstable patients** because it requires transporting the patient to the radiology suite ("Death in the CT suite"). * **MRI Scan:** It has no role in acute trauma due to long acquisition times and incompatibility with resuscitation equipment. * **Diagnostic Peritoneal Lavage (DPL):** Once the gold standard, it is now largely replaced by FAST. It is invasive, time-consuming, and carries a risk of iatrogenic injury. It is reserved for cases where FAST is inconclusive or unavailable in an unstable patient. **High-Yield Clinical Pearls for NEET-PG:** * **Stable Patient + Blunt Trauma:** CECT Abdomen is the investigation of choice. * **Unstable Patient + Positive FAST:** Proceed directly to **Exploratory Laparotomy**. * **FAST Components:** Evaluates 4 areas—Hepatorenal pouch, Splenorenal pouch, Pelvis (Pouch of Douglas), and Pericardium. * **Limitation of FAST:** It cannot reliably detect retroperitoneal hemorrhage or hollow viscus perforation.

Q: What is the first priority in the management of a burn injury?

Airway control. **Explanation:** The management of a burn patient follows the standard **Advanced Trauma Life Support (ATLS)** protocol, where the primary survey begins with **ABCDE**. **1. Why Airway Control is the First Priority:** In burn injuries, the airway is the most critical immediate concern due to the risk of **inhalation injury**. Thermal injury to the upper airway can lead to rapid, life-threatening edema. If a patient presents with signs of inhalation injury (e.g., singed nasal hairs, carbonaceous sputum, or facial burns), the airway must be secured via endotracheal intubation immediately, as subsequent swelling may make later intubation impossible. **2. Why other options are incorrect:** * **Circulation (C) and Fluid Resuscitation (B):** While fluid resuscitation is vital in burns to prevent hypovolemic shock (using the Parkland formula), it follows Airway (A) and Breathing (B) in the priority sequence. Circulation is the "C" in ABCDE. * **Exposure (E):** This is the final step of the primary survey. While important to remove smoldering clothing and assess the Total Body Surface Area (TBSA) of the burn, it is never prioritized over life-saving airway management. **Clinical Pearls for NEET-PG:** * **Indication for early intubation:** Stridor, hoarseness, or use of accessory muscles in a burn victim. * **Carbon Monoxide (CO) Poisoning:** Always suspect this in closed-space fires. Treat with 100% humidified oxygen. Note that pulse oximetry is unreliable in CO poisoning as it cannot distinguish carboxyhemoglobin from oxyhemoglobin. * **Rule of Nines:** Used for rapid TBSA assessment; remember that first-degree burns (erythema only) are **not** included in fluid calculations.

Q: What is the name of the wiring technique used for mandibular fractures?

Risdon wiring. **Explanation:** The management of mandibular fractures often involves **Intermaxillary Fixation (IMF)** to stabilize the jaw. **Risdon wiring** is the correct answer because it is a specific technique used to provide stable anchorage for IMF, particularly in cases where multiple teeth are missing or when additional horizontal stability is required. In this technique, a long wire is passed around the most posterior teeth on both sides and twisted to form a "horizontal cable" or arch wire along the buccal vestibule, to which other wires can be attached. **Analysis of Incorrect Options:** * **Ivy’s wiring:** This is a method of interdental wiring used to stabilize two adjacent teeth. It involves forming a small loop (eyelet) between two teeth to provide an attachment point for maxillomandibular fixation. * **Eyelet wiring:** This is essentially the same as Ivy’s wiring. It is used for temporary stabilization and is not a "full-arch" wiring technique like Risdon. * **Gilmer wiring:** This is the simplest and oldest form of IMF where wires are passed directly around the necks of individual upper and lower teeth and then twisted together. Its main disadvantage is that the mouth cannot be opened in an emergency without cutting the wires. **Clinical Pearls for NEET-PG:** * **Most common site of Mandibular fracture:** Condyle (followed by the Angle and Symphysis). * **Champy’s Line:** The ideal line of osteosynthesis for placing mini-plates in mandibular fractures (along the line of tension). * **Guardsman Fracture:** A midline symphysis fracture combined with bilateral condylar fractures, often caused by a blow to the chin. * **First-line investigation:** Orthopantomogram (OPG). For the symphysis/parasymphysis, a **Lower Occlusal View** is preferred.

Q: Which of the following causes maximum bleeding?

Artery caught between fractured ends of bones. ### Explanation The amount of bleeding from an arterial injury depends primarily on the vessel's ability to undergo **vasospasm and retraction**. **Why Option C is Correct:** When an artery is caught between fractured bone ends, it is held **distended and patent**. The mechanical entrapment prevents the vessel from retracting into the surrounding soft tissues and prevents the muscular wall from contracting (vasospasm). This keeps the lumen wide open, leading to continuous, profuse, and often fatal hemorrhage. **Analysis of Incorrect Options:** * **B. Complete arterial severing:** Contrary to intuition, a completely transected artery often bleeds less than a partially injured one. The severed ends can retract into the sheath and undergo intense circumferential vasospasm, which facilitates clot formation and natural hemostasis. * **A. Partial arterial severing:** In a partial tear (e.g., a longitudinal or transverse nick), the intact portion of the arterial wall prevents the vessel from retracting or contracting fully. While this bleeds more than a complete transection, it typically bleeds less than an artery held open by bone fragments. * **D. Intimal tear:** This involves an internal injury to the vessel lining. While it is highly dangerous because it leads to **thrombosis and distal ischemia**, it rarely causes significant external or cavitary bleeding. **High-Yield Clinical Pearls for NEET-PG:** * **The "Retraction Principle":** A completely severed artery is safer than a partially torn one because retraction is the body's primary defense against exsanguination. * **Fracture Association:** Brachial artery injuries are most common with supracondylar fractures of the humerus, while Popliteal artery injuries are common with knee dislocations or distal femur fractures. * **Management:** In trauma, the priority is always "Control the Bleed" (Pressure > Tourniquet) followed by restoring distal perfusion.

Question 1

A 70-year-old man presents with acute abdominal pain, a pulsating abdominal mass, and shock. What is the most appropriate immediate management?

Accepted Answer

Perform a CT scan of the abdomen to diagnose the aneurysm.

Answer

Administer 6 units of blood transfusion.

Answer

Immediately transfer the patient to the Operating Theatre for exploration of the abdomen.

Answer

Perform a laparotomy.

Question 2

A 26-year-old man is resuscitated with packed red blood cells following a motor vehicle collision complicated by a fractured pelvis and resultant hemorrhage. A few hours later the patient becomes hypotensive with a normal central venous pressure (CVP), oliguric, and febrile. Upon examination, the patient is noted to have profuse oozing of blood from his intravenous (IV) sites. Which of the following is the most likely diagnosis?

Accepted Answer

Transfusion reaction

Answer

Hypovolemic shock

Answer

Acute adrenal insufficiency

Answer

Gram-negative bacteremia

Question 3

A 26-year-old man presents to the emergency department following a vehicular accident where a truck ran over him. A chest X-ray reveals an air-fluid level in the left lung and a nasogastric tube coiled upward into the left chest. What is the next best step in the management of this patient?

Accepted Answer

Laparotomy

Answer

Placement of a chest tube on the left side

Answer

Thoracotomy

Answer

Diagnostic peritoneal lavage

Question 4

Increased central venous pressure (CVP) and pulmonary wedge pressure (PWP) are typically seen in which type of shock?

Accepted Answer

Cardiogenic shock

Answer

Neurogenic shock

Answer

Hypovolemic shock

Answer

Septic shock

Question 5

What is the investigation of choice for diagnosing intra-abdominal bleeding in an unstable patient?

Accepted Answer

Ultrasound (USG)

Answer

CT scan

Answer

MRI scan

Answer

Diagnostic peritoneal lavage

Question 6

What is the first priority in the management of a burn injury?

Accepted Answer

Airway control

Answer

Exposure

Answer

Fluid resuscitation

Answer

Circulation

Question 7

In children below 8 years of age, a high level of craniofacial disjunction (Le Fort III classification) is rarely seen because?

Accepted Answer

There is a lack of poorly developed ethmoidal and sphenoidal sinuses.

Answer

Children in this age group rarely experience such traumatic incidents.

Answer

The facial skeleton is covered with thick soft tissue.

Answer

The line of demarcation between medullary and cortical bone is less evident.

Question 8

Which nerve has the best prognosis after repair?

Accepted Answer

Radial nerve

Answer

Median nerve

Answer

Sciatic nerve

Answer

Ulnar nerve

Question 9

What is the name of the wiring technique used for mandibular fractures?

Accepted Answer

Risdon wiring

Answer

Ivy's wiring

Answer

Gilmer wiring

Answer

Eyelet wiring

Question 10

Which of the following causes maximum bleeding?

Accepted Answer

Artery caught between fractured ends of bones

Answer

Partial arterial severing

Answer

Complete arterial severing

Answer

Intimal tear

Trauma — MCQs

Trauma — MCQs

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