Trauma Practice Questions

Q: Fracture of the mandible in an edentulous jaw is best treated with:

External fixator. ### Explanation **Correct Answer: A. External fixator** **Why it is correct:** In an edentulous patient (one without teeth), the primary challenge in managing mandibular fractures is the lack of a stable dental scaffold. Traditional methods like Intermaxillary Fixation (IMF) rely on teeth to provide anchorage and restore occlusion. In the absence of teeth, an **External Fixator** (e.g., Morris biphase or Gunning splints with external pins) is preferred because it provides rigid stabilization by anchoring directly into the bone from the outside, bypassing the need for dental support. It is particularly useful in comminuted fractures or when the patient’s dentures are unavailable or broken. **Why the other options are incorrect:** * **B. Minerva plaster cast:** This is used for cervical spine injuries (stabilizing the head, neck, and upper torso) and has no role in the management of mandibular fractures. * **C. Interdental wiring:** This technique requires the presence of healthy, stable teeth to anchor the wires. In an edentulous jaw, there are no teeth to wire together. * **D. Intermaxillary elastic traction:** Similar to wiring, this requires teeth or dental implants to apply the elastic force between the upper and lower jaws. **High-Yield Clinical Pearls for NEET-PG:** * **Gunning Splints:** These are specialized "denture-like" appliances used in edentulous patients to achieve IMF by wiring the splints to the alveolar bone (circum-mandibular and zygomatic wiring). * **Atrophic Mandible:** Edentulous jaws are often atrophic with reduced blood supply (centripetal flow). This makes them prone to non-union; hence, minimal periosteal stripping is vital. * **Most common site of Mandibular Fracture:** Condyle > Angle > Symphysis. * **Clinical Sign:** Derangement of occlusion is the most common sign of a mandibular fracture in dentate patients.

Q: A 62-year-old man presents to the emergency department following head trauma. He is receiving oxygen via a face mask and reservoir bag at 15 L/min, has a cervical collar in place, and an intravenous line. His Glasgow Coma Scale score is E1 (no eye opening except to pain), V2 (incomprehensible sounds), and M4 (flexion withdrawal to painful stimuli). He has no gag reflex when suctioned. What is the next best step in the management of this patient?

Intubate the patient. ### Explanation The management of trauma follows the **ATLS (Advanced Trauma Life Support)** protocol, where the priority is always **ABCDE** (Airway, Breathing, Circulation, Disability, Exposure). **1. Why Intubation is the Correct Answer:** The patient’s Glasgow Coma Scale (GCS) score is **7** (E1 + V2 + M4 = 7). According to ATLS guidelines, any patient with a **GCS ≤ 8** requires definitive airway management (endotracheal intubation). Furthermore, the absence of a **gag reflex** indicates that the patient cannot protect his airway against aspiration. In head trauma, securing the airway is critical to prevent secondary brain injury caused by hypoxia and hypercapnia. **2. Why Other Options are Incorrect:** * **B & D (Surgical Interventions):** Decompressive hemicraniectomy or burr holes are neurosurgical interventions for raised intracranial pressure or hematomas. These are considered only *after* the airway is secured and the patient is stabilized. * **C (CT Head):** While a non-contrast CT is the gold standard for diagnosing intracranial hemorrhage, it should never precede the stabilization of the airway. Sending an unstable patient with a GCS of 7 to the radiology suite without a secured airway is a "fatal" mistake in trauma management. **3. Clinical Pearls for NEET-PG:** * **GCS ≤ 8 = Intubate:** This is a classic high-yield rule. * **Airway First:** In any trauma question, if the airway is compromised or the GCS is low, "Secure the Airway" or "Intubate" is almost always the next best step, regardless of other injuries. * **Cervical Spine:** During intubation in trauma, **Manual In-Line Stabilization (MILS)** must be maintained to protect the cervical spine. * **Secondary Brain Injury:** The primary goal of early intubation in head injury is to maintain PaO₂ > 60 mmHg and avoid hypotension, as these are the strongest predictors of poor outcome.

Q: In craniocerebral trauma, in which of the following situations is a lumbar puncture considered essential?

When meningitis is suspected. In craniocerebral trauma, the primary role of a Lumbar Puncture (LP) is diagnostic rather than therapeutic. ### **Why Option D is Correct** **Meningitis** is a potential complication of head trauma, particularly in cases involving basilar skull fractures or penetrating injuries that create a communication between the environment (or paranasal sinuses) and the subarachnoid space [3]. If a patient develops fever, neck stiffness, or deteriorating consciousness after trauma, an LP is **essential** to analyze the Cerebrospinal Fluid (CSF) for pleocytosis, low glucose, and organisms to confirm the diagnosis and guide antibiotic therapy [1]. ### **Why Other Options are Incorrect** * **Option A & C:** Lumbar puncture is strictly **contraindicated** in the presence of significantly raised intracranial tension (ICT) or papilledema. Performing an LP in these scenarios can create a pressure gradient that leads to **uncal or tonsillar herniation**, which is often fatal [4]. * **Option B:** In cases of prolonged unconsciousness following trauma, the gold standard investigation is a **Non-Contrast CT (NCCT) Head** [5] to rule out intracranial hemorrhages (EDH, SDH, ICH) or diffuse axonal injury. LP provides no diagnostic value for unconsciousness itself and may be dangerous if an underlying mass lesion exists [2]. ### **High-Yield Clinical Pearls for NEET-PG** * **The Golden Rule:** Always perform a CT scan before an LP in trauma patients to rule out a space-occupying lesion or midline shift. * **CSF Rhinorrhea/Otorrhea:** Suggests a dural tear. The most common organism causing post-traumatic meningitis is *Streptococcus pneumoniae*. * **Xanthochromia:** If an LP is performed and the supernatant is yellow, it indicates older subarachnoid hemorrhage (hemoglobin breakdown), helping differentiate it from a "traumatic tap" [2].

Q: "Panda facies" is commonly seen after which type of fracture?

Le fort II fractures. **Explanation:** **Panda Facies** (also known as "Raccoon eyes" or periorbital ecchymosis) refers to the bilateral bruising around the eyes caused by blood tracking into the periorbital soft tissues. **Why Le Fort II is the correct answer:** Le Fort II fractures are **pyramidal fractures** that involve the nasal bones, maxillary sinuses, and the **infraorbital rim**. Because the fracture line passes through the orbital floor and the bridge of the nose, it causes significant hemorrhage and edema in the periorbital area. This results in the characteristic "Panda Facies," often accompanied by a "dish-face" deformity (midface retrusion). **Analysis of Incorrect Options:** * **Le Fort I:** This is a horizontal fracture (Guerin’s fracture) separating the alveolar process from the rest of the maxilla. It involves only the lower maxilla and palate; it does not involve the orbits, so Panda facies is absent. * **Mandible Fractures:** These involve the lower jaw. While they cause swelling and malocclusion, they do not involve the midface or orbital structures required to produce periorbital ecchymosis. **High-Yield Clinical Pearls for NEET-PG:** * **Le Fort III:** Also presents with Panda facies and dish-face deformity, as it involves complete craniofacial disjunction (including the zygomatic arch and lateral orbital wall). * **Battle’s Sign:** Post-auricular ecchymosis indicating a fracture of the **petrous temporal bone** (base of skull). * **CSF Rhinorrhea:** Most common in Le Fort II and III due to involvement of the ethmoid bone/cribriform plate. * **Guérin’s Sign:** Ecchymosis in the region of the greater palatine vessels, specifically seen in **Le Fort I**.

Q: Spleenic injury is diagnosed on X-ray by which of the following findings?

Rib fracture. **Explanation:** The spleen is the most commonly injured organ in blunt abdominal trauma. Because the spleen is located in the left upper quadrant, protected by the lower rib cage, a **fracture of the left 9th, 10th, or 11th ribs** is a highly significant indirect sign of splenic injury. The force required to break these ribs is often sufficient to cause underlying splenic laceration or hematoma. **Analysis of Options:** * **Rib fracture (Correct):** This is the most reliable radiographic sign associated with splenic trauma. While not definitive for the injury itself, its presence in a trauma setting strongly necessitates further evaluation (like CT) for splenic involvement. * **Half stomach shadow:** This refers to the "indented" appearance of the gastric bubble due to a perisplenic hematoma. While a classic sign, it is less frequently seen and less specific than the presence of associated rib fractures. * **Obliteration of splenic shadow:** While a large hematoma can obscure the splenic outline, this is a subjective and unreliable finding on plain X-rays, as bowel gas often masks the area. * **Gas under diaphragm:** This indicates a **pneumoperitoneum**, which signifies a perforated hollow viscus (like the stomach or intestine), not a solid organ injury like a splenic rupture. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard Investigation:** Contrast-Enhanced CT (CECT) is the investigation of choice for diagnosing and grading splenic injury in stable patients. * **Kehr’s Sign:** Referred pain to the left shoulder due to diaphragmatic irritation by splenic blood. * **Ballance’s Sign:** Fixed dullness to percussion in the left flank and shifting dullness in the right flank. * **Management:** Hemodynamically stable patients are managed conservatively; unstable patients require urgent laparotomy.

Question 1

What is the management of flail chest with respiratory failure?

Accepted Answer

Intermittent positive pressure ventilation (IPPV)

Answer

Chest tube drainage

Answer

Oxygen administration

Answer

Internal operative fixation of the fractured segments

Question 2

Fracture of the mandible in an edentulous jaw is best treated with:

Accepted Answer

External fixator

Answer

Minerva plaster cast

Answer

Interdental wiring

Answer

Intermaxillary elastic traction

Question 3

A patient with a suspected pelvic fracture presents with urethral bleeding and an inability to pass urine. What is the most appropriate immediate management?

Accepted Answer

Prepare for surgery and attempt catheterization in the operating theatre.

Answer

Encourage voiding after administering antibiotics and analgesics.

Answer

Immediate Foley catheterization in the ward.

Answer

Apply a hot water bottle and administer carbachol injection.

Question 4

A patient with a head injury presents with rapidly deteriorating sensorium and progressive dilatation and fixation of the pupil. As a surgeon in a primary care setting, with neurosurgical consultation and CT scan unavailable, you decide to perform an emergent burr hole to relieve intracranial pressure. Which of the following sites is most appropriate for the burr hole?

Accepted Answer

In the temporal region ipsilateral to the side of pupillary dilatation

Answer

In the temporal region contralateral to the side of pupillary dilatation

Answer

In the midline if both pupils are equal or the side of pupillary dilatation is unknown

Answer

Refer to a higher center if both pupils are equal or the side of pupillary dilatation is unknown

Question 5

A 62-year-old man presents to the emergency department following head trauma. He is receiving oxygen via a face mask and reservoir bag at 15 L/min, has a cervical collar in place, and an intravenous line. His Glasgow Coma Scale score is E1 (no eye opening except to pain), V2 (incomprehensible sounds), and M4 (flexion withdrawal to painful stimuli). He has no gag reflex when suctioned. What is the next best step in the management of this patient?

Accepted Answer

Intubate the patient

Answer

Urgent decompressive hemicraniectomy

Answer

Urgent non-contrast CT head

Answer

Administer mannitol and perform burr hole surgery

Question 6

All of the following are synthetic dressings used in burn wound management EXCEPT?

Accepted Answer

Dacron

Answer

Opsite

Answer

Biobrane

Answer

Integra

Question 7

In craniocerebral trauma, in which of the following situations is a lumbar puncture considered essential?

Accepted Answer

When meningitis is suspected

Answer

To confirm raised intracranial tension

Answer

In cases of prolonged unconsciousness

Answer

When papilledema is present

Question 8

All of the following are true about trauma management except:

Accepted Answer

Tertiary survey is usually performed about 48 hours after admission.

Answer

Primary survey is aimed at detecting and simultaneously treating immediately life-threatening injuries.

Answer

AMPLE history should be taken during the secondary survey.

Answer

Tertiary survey is a comprehensive patient evaluation after the initial resuscitation period.

Question 9

"Panda facies" is commonly seen after which type of fracture?

Accepted Answer

Le fort II fractures

Answer

Le fort I fractures

Answer

Mandible fractures

Answer

None of the above

Question 10

Spleenic injury is diagnosed on X-ray by which of the following findings?

Accepted Answer

Rib fracture

Answer

Half stomach shadow

Answer

Obliteration of splenic shadow

Answer

Gas under diaphragm

Trauma — MCQs

Trauma — MCQs

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