Trauma Practice Questions

Q: What is the most common site for an extradural hematoma?

Temporo-parietal. ### Explanation **Correct Answer: B. Temporo-parietal** **1. Why Temporo-parietal is correct:** An Extradural Hematoma (EDH) most commonly occurs due to arterial bleeding into the space between the inner table of the skull and the dura mater. The **Temporo-parietal region** is the most frequent site because the bone (pterion) is thinnest here, making it highly susceptible to fractures. This area overlies the **Middle Meningeal Artery (MMA)**, specifically its anterior branch. Trauma to this region often results in a skull fracture that lacerates the MMA, leading to the classic biconvex (lens-shaped) hematoma seen on CT. **2. Why other options are incorrect:** * **Frontal (A):** While the second most common site, it is less frequent than the temporo-parietal region. * **Occipital (C):** Rare for EDH; trauma here is more likely to cause posterior fossa hematomas or parenchymal contusions. * **Brain stem (D):** This is an intracranial structure. EDH is an extracerebral collection; primary brain stem injuries are usually related to Diffuse Axonal Injury (DAI) or Duret hemorrhages. **3. Clinical Pearls for NEET-PG:** * **Classic Presentation:** History of head trauma → **Lucid Interval** (temporary improvement before rapid deterioration) → Ipsilateral pupil dilation (due to 3rd nerve compression) → Contralateral hemiparesis. * **Imaging:** Non-contrast CT (NCCT) shows a **hyperdense, biconvex/lenticular** shape that does *not* cross suture lines (but can cross the midline). * **Source of Bleed:** Arterial (85%) - Middle Meningeal Artery; Venous (15%) - Dural venous sinuses (common in children). * **Management:** Urgent surgical evacuation via burr hole or craniotomy if the volume is >30ml or GCS is decreasing.

Q: A 25-year-old college student sustains injuries in a road traffic accident and is brought to the casualty department. The patient presents with marked abdominal distension, a pulse rate of 140/minute, and a blood pressure of 80/50 mm Hg. What is the most appropriate initial investigation?

FAST scan. **Explanation:** The patient presents with **hypovolemic shock** (tachycardia 140/min, hypotension 80/50 mmHg) and abdominal distension following blunt trauma. This clinical picture suggests a massive hemoperitoneum. **1. Why FAST scan is the correct answer:** In an **unstable** trauma patient, the primary goal is to identify the source of hemorrhage rapidly without moving the patient from the resuscitation area. **FAST (Focused Assessment with Sonography for Trauma)** is the investigation of choice because it is bedside, non-invasive, rapid, and highly sensitive for detecting free intraperitoneal fluid (blood). It evaluates four areas: Hepatorenal pouch (Morison’s), Splenorenal recess, Pelvis (Pouch of Douglas), and the Pericardium. **2. Why other options are incorrect:** * **CT Abdomen:** While the gold standard for identifying specific organ injuries, it is **contraindicated in hemodynamically unstable patients** because it requires transporting the patient to the radiology suite ("Death begins in the CT scanner"). * **Abdominal Paracentesis:** This is an invasive procedure with a higher risk of bowel injury compared to ultrasound. It has largely been replaced by FAST or DPL (Diagnostic Peritoneal Lavage). * **Plain X-ray Abdomen:** This has very limited utility in acute trauma. It cannot reliably detect hemoperitoneum and only shows free air (perforation), which is not the immediate life-threatening priority in a shocked patient. **Clinical Pearls for NEET-PG:** * **Hemodynamically Unstable + Positive FAST:** Proceed directly to **Emergency Laparotomy**. * **Hemodynamically Stable + Positive FAST:** Proceed to **CECT Abdomen** to grade the injury. * **E-FAST:** An extended version of FAST that includes the thorax to rule out PTX (Pneumothorax) and Hemothorax. * **DPL:** Indicated only if FAST is unavailable or inconclusive in an unstable patient. A "positive" DPL is >100,000 RBCs/mm³ or >500 WBCs/mm³.

Q: A patient presents to the emergency department with breathlessness following chest trauma. The chest X-ray is shown in the image below. What is the most appropriate next step in management?

Plan for insertion of a chest tube. ***Plan for insertion of a chest tube*** - In **traumatic hemothorax** or **large pneumothorax** following chest trauma, **chest tube insertion** is the definitive emergency management to drain blood/air and prevent cardiovascular compromise. - **Tube thoracostomy** allows continuous drainage, lung re-expansion, and monitoring of ongoing bleeding, which is crucial in trauma patients. *Order for HRCT Scan* - **HRCT** is not the immediate next step in **emergency trauma** management when chest X-ray already shows significant pleural collection. - Delays definitive treatment and is inappropriate when **hemodynamic instability** or **respiratory compromise** may be present. *Thoracocentesis* - **Needle thoracocentesis** is inadequate for **traumatic hemothorax** as it cannot provide continuous drainage or handle large volumes of blood. - Reserved for **diagnostic purposes** or small pleural effusions, not for emergency trauma management with significant collections. *Observe and monitor* - **Conservative management** is inappropriate for significant **post-traumatic pleural collections** that can cause respiratory compromise. - Risk of **tension pneumothorax**, **hemodynamic instability**, or **delayed complications** makes observation insufficient in trauma patients.

Q: Which one of the following is the most common site of Berry aneurysm?

Anterior communicating artery. **Explanation:** Berry (saccular) aneurysms are acquired lesions resulting from hemodynamic stress and structural weaknesses in the arterial wall, specifically at the bifurcations of the **Circle of Willis**. **1. Why Anterior Communicating Artery (A-com) is correct:** Statistically, the **Anterior Communicating Artery** is the most common site for Berry aneurysms, accounting for approximately **30-35%** of all cases. These aneurysms typically occur at the junction of the A-com and the anterior cerebral artery (ACA). **2. Analysis of Incorrect Options:** * **Origin of Posterior Communicating Artery (P-com):** This is the **second most common** site (approx. 30-35%). A clinical hallmark of P-com aneurysms is **ipsilateral 3rd cranial nerve palsy** (pupil-involved) due to direct compression. * **Vertebro-basilar artery:** Aneurysms in the posterior circulation (vertebrobasilar system) are less common, accounting for only about **10-15%** of cases. The most common site in this system is the basilar artery apex. * **Anterior choroidal artery:** This is a relatively rare site for saccular aneurysms compared to the major junctions of the Circle of Willis. **3. NEET-PG High-Yield Pearls:** * **Most common presentation:** Subarachnoid Hemorrhage (SAH) presenting as a "thunderclap headache" or "worst headache of life." * **Risk Factors:** Polycystic Kidney Disease (ADPKD), Ehlers-Danlos syndrome, Coarctation of the aorta, and hypertension. * **Gold Standard Investigation:** Digital Subtraction Angiography (DSA). * **Screening Investigation:** CT Angiography (CTA) or MR Angiography (MRA). * **Distribution:** 85-90% occur in the anterior circulation; 10-15% in the posterior circulation.

Q: "Seat belt syndrome" is characterized by which of the following?

Sudden deceleration injury leading to a torn mesentery. **Explanation:** **Seat belt syndrome** refers to a specific pattern of injuries sustained by occupants of a motor vehicle who are wearing a lap-style seat belt during a high-velocity **sudden deceleration** accident. **Why Option B is Correct:** The mechanism involves two main forces: **compression** and **hyperflexion** over the lap belt. As the body is thrown forward, the belt acts as a fulcrum. This leads to: 1. **Hollow Viscus Injury:** The most common is a **torn mesentery** or perforation of the small bowel (usually the proximal jejunum or distal ileum) due to sudden increases in intraluminal pressure. 2. **Chance Fracture:** A horizontal distraction fracture of the thoracolumbar spine (typically L1-L3). 3. **Abdominal Wall Ecchymosis:** The "seat belt sign" on the skin is a high-yield clinical predictor of internal injury. **Why the Other Options are Incorrect:** * **Option A:** Fracture of the ilium and urethral rupture are associated with lateral compression or anteroposterior pelvic ring injuries, not typically the seat belt mechanism. * **Option C:** Femur fractures and testicular swelling are unrelated to the specific fulcrum-effect of a lap belt. * **Option D:** Mesenteric adenitis is an inflammatory/infectious condition (often mimicking appendicitis) and is not a traumatic finding. **High-Yield Clinical Pearls for NEET-PG:** * **The Triad:** Seat belt syndrome classically includes **Abdominal wall ecchymosis + Mid-lumbar spine fracture (Chance Fracture) + Hollow viscus injury.** * **Most common organ injured:** Small bowel/Mesentery. * **Imaging:** CT scan is the investigation of choice, but it may initially be negative for hollow viscus injury; serial abdominal examinations are crucial. * **Chance Fracture:** It is a **distraction injury** (Type B in AO classification) and is highly unstable.

Q: A patient having a Glasgow Coma Scale score of 12 is suffering from which of the following degrees of head injury?

Moderate head injury. ### Explanation The **Glasgow Coma Scale (GCS)** is the gold standard clinical tool used to assess a patient's level of consciousness and categorize the severity of traumatic brain injury (TBI). It evaluates three components: Eye opening (E), Verbal response (V), and Motor response (M), with scores ranging from a minimum of 3 to a maximum of 15. Based on the total GCS score, head injuries are classified as follows: * **Mild Head Injury:** GCS 13–15 * **Moderate Head Injury:** GCS 9–12 * **Severe Head Injury:** GCS 3–8 (Often associated with coma) **Why Option C is Correct:** A GCS score of **12** falls squarely within the **9–12 range**, identifying the injury as **Moderate**. Patients in this category are usually lethargic or stuporous but can follow simple commands. **Why Other Options are Incorrect:** * **A & B (Minor/Mild):** These terms are often used interchangeably in clinical practice. A score of 13–15 is required for this classification. These patients are conscious and talkative but may have experienced brief post-traumatic amnesia. * **D (Severe):** This is defined by a GCS of 8 or less. In trauma management (ATLS guidelines), a GCS ≤ 8 is a definitive indication for **endotracheal intubation** ("Less than 8, intubate"). **High-Yield Clinical Pearls for NEET-PG:** 1. **Minimum Score:** The lowest possible GCS is **3** (not 0), even in a brain-dead patient. 2. **Motor Response:** The Motor (M) component is the most predictive of clinical outcomes. 3. **GCS in Children:** For children under 4 years, the **Paediatric Glasgow Coma Scale** is used, modifying the verbal and motor assessments to account for developmental age. 4. **Documentation:** If a patient is intubated, the verbal score is recorded as 'T' (e.g., GCS 5t), representing the presence of an endotracheal tube.

Question 1

Which of the following is NOT true about mandible fractures?

Accepted Answer

The anterior superior alveolar nerve is the most commonly injured nerve in mandible fractures.

Answer

The condylar neck is the most common site for a mandible fracture.

Answer

Malocclusion of teeth can occur as a result of a mandible fracture.

Answer

Panorex radiographs are useful for diagnosing mandible fractures.

Question 2

What is the most common site for an extradural hematoma?

Accepted Answer

Temporo-parietal

Answer

Frontal

Answer

Occipital

Answer

Brain stem

Question 3

Which of the following statements regarding the management of burns is incorrect?

Accepted Answer

Emergency intubation may be performed using succinylcholine as a muscle relaxant.

Answer

Cool the area with tap water by continuous irrigation.

Answer

Provide sedation and proper analgesia.

Answer

Initiate fluid resuscitation.

Question 4

A 25-year-old college student sustains injuries in a road traffic accident and is brought to the casualty department. The patient presents with marked abdominal distension, a pulse rate of 140/minute, and a blood pressure of 80/50 mm Hg. What is the most appropriate initial investigation?

Accepted Answer

FAST scan

Answer

Abdominal paracentesis

Answer

CT abdomen

Answer

Plain X-ray of the abdomen

Question 5

A patient presents to the emergency department with breathlessness following chest trauma. The chest X-ray is shown in the image below. What is the most appropriate next step in management?

Accepted Answer

Plan for insertion of a chest tube

Answer

Order for HRCT Scan

Answer

Thoracocentesis

Answer

Observe and monitor

Question 6

Which one of the following is the most common site of Berry aneurysm?

Accepted Answer

Anterior communicating artery

Answer

Vertebro-basilar artery

Answer

Origin of posterior communicating artery

Answer

Anterior choroidal artery

Question 7

"Seat belt syndrome" is characterized by which of the following?

Accepted Answer

Sudden deceleration injury leading to a torn mesentery

Answer

Fracture of the ilium with rupture of the urethra

Answer

Fracture of the shaft of the femur with testicular swelling

Answer

Non-specific findings including mesenteric adenitis

Question 8

Which of the following is the best location for assessing the reduction of zygomatic fractures?

Accepted Answer

Zygomaticosphenoid suture

Answer

Zygomatic arch

Answer

Zygomatic-maxillary buttress

Answer

Infra-orbital rim

Question 9

What is the initial treatment for tension pneumothorax?

Accepted Answer

Insertion of a large bore needle in the 2nd intercostal space in the midclavicular line

Answer

Fluid resuscitation

Answer

Initiation of inotropic support

Answer

Endotracheal intubation

Question 10

A patient having a Glasgow Coma Scale score of 12 is suffering from which of the following degrees of head injury?

Accepted Answer

Moderate head injury

Answer

Minor head injury

Answer

Mild head injury

Answer

Severe head injury

Trauma — MCQs

Trauma — MCQs

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