Trauma Practice Questions

Q: In traumatic cases, shock is most likely due to what?

Injury to an intra-abdominal solid organ. In the context of trauma, the most common cause of shock is **hypovolemic (hemorrhagic) shock**. **Explanation of the Correct Answer:** **Injury to an intra-abdominal solid organ** (such as the spleen or liver) is a major cause of significant internal hemorrhage. The abdominal cavity can sequester large volumes of blood (up to several liters) without immediate external signs. In blunt trauma, the spleen is the most commonly injured organ, while the liver is the most common cause of fatal intra-abdominal hemorrhage. Rapid blood loss leads to decreased venous return, reduced cardiac output, and subsequent tissue hypoperfusion. **Why the other options are incorrect:** * **Head injury:** Isolated head injuries rarely cause shock in adults. If a patient with a head injury is in shock, the clinician must look for an extracranial source of bleeding (e.g., abdomen or chest). Shock in head injury usually only occurs as a terminal event (Cushing’s reflex). * **Septicemia:** While a cause of distributive shock, it typically develops days after the initial trauma due to secondary infections or bowel perforation, rather than being the immediate cause of shock in the acute setting. * **Cardiac failure:** Cardiogenic shock in trauma is usually due to blunt cardiac injury or tamponade, which are less frequent than hemorrhagic causes. **High-Yield Clinical Pearls for NEET-PG:** * **Golden Rule:** In any trauma patient, shock is **hemorrhagic** until proven otherwise. * **Most common organ injured (Blunt Trauma):** Spleen. * **Most common organ injured (Stab/Penetrating):** Liver. * **Lethal Triad of Trauma:** Acidosis, Coagulopathy, and Hypothermia. * **Initial Management:** The first step in managing hemorrhagic shock is volume resuscitation (crystalloids) and immediate hemorrhage control.

Q: A patient presents with lower chest trauma and abdominal pain. Their blood pressure is 60/40 mmHg and pulse is 120 beats/min. What is the next best investigation?

USG FAST (Focused Assessment with Sonography for Trauma). ### Explanation The patient presents with signs of **hypovolemic shock** (BP 60/40 mmHg, Pulse 120 bpm) following blunt trauma. In an **hemodynamically unstable** patient, the primary goal is to identify the source of internal bleeding rapidly without moving the patient out of the resuscitation bay. **Why USG FAST is the Correct Answer:** FAST (Focused Assessment with Sonography for Trauma) is the investigation of choice for hemodynamically unstable patients with suspected abdominal or lower chest trauma. It is a rapid, non-invasive, bedside tool used to detect free intraperitoneal fluid (hemoperitoneum) or pericardial tamponade. In this scenario, a positive FAST would lead directly to an emergency laparotomy. **Why Other Options are Incorrect:** * **CT Abdomen:** While the "gold standard" for identifying specific organ injuries, it is **contraindicated** in unstable patients. CT requires the patient to be moved to the radiology suite, which is unsafe for someone with a BP of 60/40 mmHg ("Death begins in the CT scanner"). * **MR Angiography:** This is time-consuming, expensive, and has no role in the acute management of trauma resuscitation. * **X-ray Abdomen:** It has very low sensitivity for detecting hemoperitoneum or solid organ injury and delays definitive management. **Clinical Pearls for NEET-PG:** * **Hemodynamically Unstable + Positive FAST:** Proceed to Laparotomy. * **Hemodynamically Unstable + Negative FAST:** Look for other sources of blood loss (pelvis, long bones, or retroperitoneum) or consider DPL (Diagnostic Peritoneal Lavage). * **Hemodynamically Stable:** CT Abdomen with contrast is the investigation of choice. * **FAST Windows:** 1. Perihepatic (Morison’s Pouch), 2. Perisplenic, 3. Pelvic (Pouch of Douglas/Retrovesical), 4. Pericardial. E-FAST (Extended FAST) adds pleural views to detect pneumothorax/hemothorax.

Q: All of the following are indications for CT scan in a patient with head injury except?

An episode of vomiting. In the management of head injuries, the decision to perform a CT scan is guided by clinical decision rules like the **Canadian CT Head Rule (CCHR)** and **NICE guidelines**. **Why "An episode of vomiting" is the correct answer:** According to the Canadian CT Head Rule, **two or more episodes** of vomiting are required to justify a CT scan. A single, isolated episode of vomiting in an otherwise stable patient is not a high-risk indicator for intracranial hemorrhage and does not mandate immediate imaging. **Explanation of Incorrect Options:** * **Focal neurological deficit:** This is a "High Risk" criteria. Any deficit (e.g., limb weakness, cranial nerve palsy) suggests a localized brain injury or mass effect (like an EDH or SDH), requiring urgent CT. * **GCS <13 at presentation:** A GCS score of <13 at any point, or <15 two hours after injury, indicates a significant risk of neurosurgical intervention. * **Patient is on warfarin:** Patients on anticoagulants (Warfarin, NOACs) or antiplatelets are at high risk for "delayed intracranial hemorrhage," even after minor trauma. Imaging is mandatory regardless of the GCS score. **High-Yield Clinical Pearls for NEET-PG:** * **Canadian CT Head Rule (High Risk for Intervention):** GCS 30 minutes before the impact is an indication for CT. * **Gold Standard:** Non-Contrast CT (NCCT) Head is the investigation of choice for acute head trauma to rule out hemorrhage.

Q: Pyramidal fracture of the maxilla is:

Le Fort II. **Explanation:** The Le Fort classification system is used to categorize fractures of the midface based on the lines of weakness in the facial skeleton. **Le Fort II (Pyramidal Fracture):** This is the correct answer because the fracture line takes a pyramidal shape. It extends from the nasal bridge through the frontal process of the maxilla, lacrimal bones, and inferior orbital rim, then passes through the zygomaticomaxillary suture and into the pterygoid plates. The result is a pyramid-shaped segment of the midface (including the nose and palate) that becomes mobile. **Incorrect Options:** * **Le Fort I (Guerin’s Fracture):** This is a **horizontal** fracture. It separates the alveolar process and palate from the rest of the maxilla. It is often called a "floating palate." * **Le Fort III (Craniofacial Disjunction):** This is a complete separation of the facial bones from the cranial base. The fracture line passes through the frontonasal suture, orbits, and zygomatic arches. * **Craniofacial Disruption:** This is a general descriptive term often used synonymously with Le Fort III, but it is not the specific anatomical name for a pyramidal fracture. **Clinical Pearls for NEET-PG:** * **Key Clinical Sign:** In Le Fort II and III, "dish-face" deformity and CSF rhinorrhea (due to cribriform plate involvement) may be seen. * **Airway Management:** In severe midface trauma, avoid blind nasotracheal intubation if a cribriform plate fracture is suspected. * **Pterygoid Plates:** All three Le Fort fractures involve the pterygoid plates; if these are not fractured, it is not a classic Le Fort injury. * **Sensory Deficit:** Infraorbital nerve anesthesia is most common in Le Fort II due to the involvement of the inferior orbital rim.

Q: What is the most effective treatment for frostbite on the lower extremities?

Rewarming with immersion in warm water. **Explanation:** The primary goal in treating frostbite is to restore tissue temperature rapidly and uniformly to prevent further ice crystal formation and minimize tissue necrosis. **Why Option C is Correct:** **Rapid Active Rewarming** via immersion in a controlled water bath is the gold standard. The water should be maintained at a temperature of **40°C to 42°C (104°F to 108°F)**. This temperature range is warm enough to thaw tissues efficiently but not hot enough to cause thermal burns. Rewarming should continue until the distal part of the extremity becomes flushed (hyperemic), which typically takes 20–30 minutes. **Why Incorrect Options are Wrong:** * **Option A (Friction/Massage):** This is strictly contraindicated. Frostbitten tissue contains ice crystals; mechanical friction or massage can cause significant mechanical trauma and worsen tissue damage. * **Option B (Blankets):** This is a form of passive rewarming. While useful for systemic hypothermia, it is too slow for frostbite and increases the risk of progressive ischemia. * **Option D (Walking):** Weight-bearing on a frostbitten limb causes mechanical "grinding" of frozen tissues, leading to irreversible damage. Patients should be kept non-weight-bearing until the limb is fully thawed. **High-Yield Clinical Pearls for NEET-PG:** 1. **Thaw-Refreeze Cycle:** Never initiate rewarming if there is a risk of the tissue refreezing before reaching definitive care. Refreezing causes the most severe tissue damage. 2. **Analgesia:** Rapid rewarming is extremely painful; parenteral opioids are often required. 3. **Blister Management:** Clear blisters (contain prostaglandins/thromboxanes) should be aspirated or debrided, while hemorrhagic blisters (indicate deeper damage) should be left intact to prevent infection. 4. **Prophylaxis:** Tetanus prophylaxis is mandatory in all frostbite cases.

Q: A Bristow elevator is used for which of the following procedures?

Elevating a fractured zygomatic bone.. The **Bristow elevator** is a specialized surgical instrument primarily used in maxillofacial surgery for the **reduction of zygomatic bone fractures** (specifically zygomatic arch or malar complex fractures). ### Why Option B is Correct: The zygomatic bone is often displaced medially and inferiorly during trauma. The Bristow elevator is designed with a sturdy, slightly curved blade that allows the surgeon to apply significant leverage. In the **Gilles’ temporal approach**, a small incision is made in the temporal hairline; the elevator is then passed deep to the temporal fascia and superficial to the temporalis muscle to reach the medial surface of the zygomatic bone, "elevating" it back into its anatomical position. ### Why Other Options are Incorrect: * **Option A (Luxating teeth):** While elevators are used in dentistry (e.g., Coupland’s or Cryer’s elevators), the Bristow elevator is too large and lacks the specific tip geometry required for dental luxation. * **Option C (Reduction of nasal complex fracture):** Nasal fractures are typically reduced using instruments like the **Walsham’s forceps** (for the septum) or **Asch’s forceps** (for the nasal bones), which are designed to grasp and manipulate the thin nasal architecture. ### NEET-PG High-Yield Pearls: * **Gilles’ Approach:** The classic surgical approach for using a Bristow elevator to reduce a zygomatic arch fracture. * **Rowe’s Zygomatic Elevator:** Another common instrument used for the same purpose; it is often heavier and more robust than the Bristow. * **Key Landmark:** When using the Bristow elevator, the instrument must stay **deep to the deep temporal fascia** to avoid damaging the frontal branch of the facial nerve.

Question 1

In traumatic cases, shock is most likely due to what?

Accepted Answer

Injury to an intra-abdominal solid organ

Answer

Head injury

Answer

Septicemia

Answer

Cardiac failure

Question 2

A patient presents with lower chest trauma and abdominal pain. Their blood pressure is 60/40 mmHg and pulse is 120 beats/min. What is the next best investigation?

Accepted Answer

USG FAST (Focused Assessment with Sonography for Trauma)

Answer

CT abdomen

Answer

MR Angiography

Answer

X-ray abdomen

Question 3

A 25-year-old man presented to the emergency department with severe colicky abdominal pain and vomiting after blunt abdominal trauma due to assault. CECT reveals an obstruction of the duodenum with a coiled spring appearance of the 2nd and 3rd parts of the duodenum. What is the next best step in the management of this patient?

Accepted Answer

Nasogastric suction and observation

Answer

Gastrojejunostomy

Answer

Duodenal resection

Answer

Duodenojejunostomy

Question 4

All of the following are indications for CT scan in a patient with head injury except?

Accepted Answer

An episode of vomiting

Answer

Focal neurological deficit

Answer

Glasgow Coma Scale <13 at presentation

Answer

Patient is on warfarin

Question 5

Paradoxical breathing is seen in which of the following conditions?

Accepted Answer

Flail chest

Answer

Pneumonia

Answer

Pneumothorax

Answer

Atelectasis

Question 6

Pyramidal fracture of the maxilla is:

Accepted Answer

Le Fort II

Answer

Le Fort I

Answer

Le Fort III

Answer

Craniofacial disruption

Question 7

Animal and clinical studies have shown that administration of lactated Ringer's solution to patients with hypovolemic shock may what?

Accepted Answer

Improve hemodynamics by alleviating the deficit in the interstitial fluid compartment

Answer

Increase serum lactate concentration

Answer

Impair liver function

Answer

Increase metabolic acidosis

Question 8

What is the most effective treatment for frostbite on the lower extremities?

Accepted Answer

Rewarming with immersion in warm water

Answer

Rewarming with friction and/or massage

Answer

Rewarming with blankets

Answer

Rewarming with encouragement of walking on warm surfaces

Question 9

A 45-year-old woman is admitted to the hospital after her automobile left the highway in a rainstorm and hit a tree. She had been wearing a seat belt. On radiographic examination, it is observed that she has suffered fractures of the ninth and tenth rib on her left side and that she has intraabdominal bleeding. Physical examination reveals hypovolemic shock and progressive hypotension. Which of the following organs is most likely injured to result in these clinical signs?

Accepted Answer

Spleen

Answer

Liver

Answer

Pancreas

Answer

Left kidney

Question 10

A Bristow elevator is used for which of the following procedures?

Accepted Answer

Elevating a fractured zygomatic bone.

Answer

Luxating teeth.

Answer

Reduction of a nasal complex fracture.

Answer

All of the above.

Trauma — MCQs

Trauma — MCQs

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