Trauma Practice Questions

Q: A 35-year-old chemical factory worker presents to the emergency department after a sudden splash of an unknown chemical onto his hands and feet. Which of the following statements is true regarding the management of chemical burns, except?

Attempts should be made to neutralize the chemical.. **Explanation:** The management of chemical burns focuses on immediate decontamination and preventing further tissue damage. **Why Option C is the correct (False) statement:** Neutralization of a chemical (e.g., adding an acid to an alkali) is **strictly contraindicated**. The chemical reaction of neutralization is exothermic, meaning it releases significant heat. This can cause additional thermal injury to already damaged tissues, potentially worsening the depth of the burn. **Analysis of other options:** * **Option A:** Copious irrigation with water or saline is the cornerstone of management. It dilutes the chemical and washes it away. Irrigation should continue for at least 30–60 minutes (longer for alkalis). * **Option B:** Alkali burns are more dangerous because they cause **liquefactive necrosis**, which allows the chemical to penetrate deeper into the tissues. Acid burns cause **coagulative necrosis**, forming a leathery eschar that acts as a barrier to further penetration. * **Option D:** Hydrofluoric acid (HF) is unique; it causes deep tissue destruction and life-threatening hypocalcemia. Topical **calcium gluconate gel** (or intra-arterial injection) is the specific antidote used to neutralize the fluoride ion. **NEET-PG High-Yield Pearls:** 1. **Initial Step:** Remove all contaminated clothing and brush off dry powders (like lime) before irrigation. 2. **Alkali vs. Acid:** Alkali = Liquefactive necrosis (Deep); Acid = Coagulative necrosis (Superficial). 3. **Specific Antidotes:** * **Hydrofluoric Acid:** Calcium gluconate. * **White Phosphorus:** 1% Copper sulfate (turns particles black for easy removal). * **Phenol:** Polyethylene glycol (PEG) or glycerol.

Q: What is the initial management for a patient with 40% blood volume loss?

Crystalloid infusion. **Explanation:** The patient is in **Class III/IV Hemorrhagic Shock** (40% blood loss corresponds to Class IV, where blood loss is >2000 mL). The primary pathophysiology in trauma-induced hemorrhagic shock is a critical reduction in circulating volume (hypovolemia), leading to decreased preload and tissue hypoperfusion. **1. Why Crystalloid Infusion is Correct:** The cornerstone of initial resuscitation (ATLS guidelines) is the restoration of intravascular volume. **Isotonic crystalloids** (like Ringer’s Lactate or Normal Saline) are the first-line fluids used to stabilize hemodynamics and maintain organ perfusion. While Class IV shock eventually requires blood transfusion (MTP), the *initial* immediate management in any trauma setting is establishing IV access and starting crystalloid boluses. **2. Why Incorrect Options are Wrong:** * **A & B (Vasopressors/Cardiac Stimulants):** These are contraindicated as initial therapy. Vasopressors cause vasoconstriction in an already depleted vascular bed, worsening tissue ischemia. The heart is usually already tachycardic to compensate; stimulants increase myocardial oxygen demand without fixing the underlying volume deficit. * **D (Intracardiac Adrenaline):** This is an obsolete practice reserved only for specific cardiac arrest scenarios, not for the management of hypovolemic shock. **High-Yield Clinical Pearls for NEET-PG:** * **ATLS Classification:** Class I ( 40%). * **Fluid of Choice:** Ringer’s Lactate is preferred over Normal Saline to avoid hyperchloremic metabolic acidosis. * **The "Golden Hour":** Rapid volume replacement within the first hour significantly improves survival. * **Permissive Hypotension:** In non-compressible torso hemorrhage, target a lower MAP (approx. 65 mmHg) until bleeding is surgically controlled to prevent "popping the clot."

Q: The above procedure is contraindicated in which of the following conditions?

Lung abscess. ***Lung abscess*** - **Intercostal chest drain (ICD)** insertion is contraindicated as it risks **pleural contamination** and development of **empyema** by creating a direct communication between the infected lung parenchyma and pleural space. - The procedure could lead to **spillage of purulent material** into the pleural cavity, converting a localized parenchymal infection into a more serious pleural space infection. *Pleural effusion* - **ICD insertion** is a **standard treatment** for large or symptomatic pleural effusions to drain accumulated fluid and improve respiratory function. - The procedure is safe and effective for removing **transudate** or **exudate** from the pleural space without risk of contamination. *Hemothorax* - **ICD insertion** is **indicated** for hemothorax to drain accumulated blood from the pleural space and prevent **fibrothorax** formation. - Early drainage helps assess ongoing bleeding and facilitates **lung re-expansion**, making it a therapeutic rather than contraindicated procedure. *Hydropneumothorax* - **ICD insertion** is the **treatment of choice** for hydropneumothorax to simultaneously drain both air and fluid from the pleural space. - The procedure effectively manages both components of the condition, allowing **lung re-expansion** and resolution of respiratory compromise.

Q: A young male presented with dyspnea, bleeding, and petechial hemorrhage in the chest 2 days following a fracture of the shaft of the right femur. What is the most likely cause?

Fat embolism. **Explanation:** The clinical presentation of a long-bone fracture (femur shaft) followed by a **latent period of 24–72 hours**, respiratory distress (dyspnea), and a **petechial rash** (typically over the chest, axilla, and conjunctiva) is the classic triad of **Fat Embolism Syndrome (FES)**. **Why Fat Embolism is correct:** Following a major fracture, fat globules from the bone marrow enter the systemic circulation. These globules cause mechanical obstruction of pulmonary capillaries and trigger a chemical inflammatory response (via free fatty acids), leading to lung injury and the characteristic petechial rash due to capillary rupture or thrombocytopenia. **Why other options are incorrect:** * **Air Embolism:** Usually occurs acutely following venous catheterization, neck injuries, or surgery. It does not typically present with a petechial rash or a 2-day delay. * **Pulmonary Thrombo-embolism (PTE):** While common in trauma patients due to immobility, PTE usually occurs **5–10 days** post-injury. It lacks the characteristic petechial rash. * **Amniotic Fluid Embolism:** This is an obstetric emergency occurring during labor or immediate postpartum; it is irrelevant to a male patient with a femur fracture. **High-Yield Pearls for NEET-PG:** * **Gurd’s Criteria:** Used for diagnosis. Major criteria include axillary/subconjunctival petechiae, respiratory insufficiency, and CNS depression. * **Snowstorm Appearance:** Classic finding on Chest X-ray (diffuse bilateral pulmonary infiltrates). * **Early Fixation:** The most effective way to prevent FES is the early stabilization/fixation of the fracture. * **Treatment:** Primarily supportive (Oxygenation/Ventilation). Steroids are controversial and not routinely recommended.

Q: What is the name of the emergency thoracotomy procedure illustrated?

Clamshell thoracotomy. ***Clamshell thoracotomy*** - This procedure involves **bilateral anterior thoracotomies** connected across the sternum, creating a "clamshell" appearance with wide exposure of both pleural cavities. - Used in **emergency trauma settings** for cardiac arrest, massive hemothorax, or when bilateral lung access is needed for resuscitation. *Right thoracotomy* - Involves a **single incision** on the right side of the chest, typically through the **4th or 5th intercostal space**. - Provides access to the **right lung**, esophagus, and right-sided mediastinal structures, but lacks bilateral exposure. *Median sternotomy* - Requires **vertical division of the sternum** from the suprasternal notch to the xiphoid process. - Provides excellent access to the **heart and great vessels** but takes more time and is not ideal for emergency thoracic trauma. *Left thoracotomy* - Involves a **single incision** on the left side, commonly used for emergency **resuscitative thoracotomy**. - Provides rapid access to the **heart for cardiac massage** and aortic cross-clamping, but limited to left-sided structures.

Question 1

Which of the following does NOT require hospitalization?

Accepted Answer

5% burns in children

Answer

10% scalds in children

Answer

Electrocution

Answer

15% deep burns in adults

Question 2

A 35-year-old chemical factory worker presents to the emergency department after a sudden splash of an unknown chemical onto his hands and feet. Which of the following statements is true regarding the management of chemical burns, except?

Accepted Answer

Attempts should be made to neutralize the chemical.

Answer

Copious irrigation with water should be performed.

Answer

Alkali burns are generally more destructive and dangerous than acid burns.

Answer

Topical calcium gluconate is used in the treatment of hydrofluoric acid burns.

Question 3

What is the initial management for a patient with 40% blood volume loss?

Accepted Answer

Crystalloid infusion

Answer

Vasopressor agents

Answer

Cardiac stimulants

Answer

Intracardiac adrenaline

Question 4

The above procedure is contraindicated in which of the following conditions?

Accepted Answer

Lung abscess

Answer

Pleural effusion

Answer

Hemothorax

Answer

Hydropneumothorax

Question 5

Massive blood transfusion is defined as:

Accepted Answer

Replacement of the entire blood volume within a 24-hour period

Answer

Replacement of half the blood volume within a 24-hour period

Answer

Replacement of 40% of the blood volume within a 24-hour period

Answer

Replacement of 60% of the blood volume within a 24-hour period

Question 6

If a fracture of the mandible occurs distal to a lost tooth, what is the treatment of choice?

Accepted Answer

Open reduction with bone plating

Answer

Closed reduction with intermaxillary fixation (IMF)

Answer

Open reduction with interosseous wiring

Answer

Closed reduction with cap splint

Question 7

A young male presented with dyspnea, bleeding, and petechial hemorrhage in the chest 2 days following a fracture of the shaft of the right femur. What is the most likely cause?

Accepted Answer

Fat embolism

Answer

Air embolism

Answer

Pulmonary thrombo-embolism

Answer

Amniotic fluid embolism

Question 8

Which of the following statements is false regarding a epidural hematoma?

Accepted Answer

Rupture of bridging or communicating veins is the primary cause.

Answer

A lucid interval is typically seen.

Answer

Fracture of the temporal bone is commonly present.

Answer

A fissure fracture is often seen.

Question 9

What is an absolute contraindication for tooth extraction when related to a fracture line?

Accepted Answer

None of the above.

Answer

Tooth related to pericoronitis

Answer

Tooth interferes with reduction of fracture.

Answer

Avulsed tooth.

Question 10

What is the name of the emergency thoracotomy procedure illustrated?

Accepted Answer

Clamshell thoracotomy

Answer

Right thoracotomy

Answer

Median sternotomy

Answer

Left thoracotomy

Trauma — MCQs

Trauma — MCQs

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