Okay, let's tackle this question. The patient is a 42-year-old man with a house fire injury. He has singed nose hairs and facial burns, which are classic signs of inhalation injury. The laryngoscopy shows pharyngeal edema and mucosal sloughing, so that's a strong indicator of upper airway involvement. The TBSA is 60%, which is a large burn.

The question is about the next step in management. The options aren't given, but the correct answer is likely related to airway management. Since there's evidence of inhalation injury, securing the airway is critical. These patients can develop rapid airway edema leading to obstruction. Early intubation is usually recommended in such cases. So the next step would be endotracheal intubation to secure the airway before it becomes compromised.

Other steps like fluid resuscitation (Parkland formula) are important but secondary to ensuring a patent airway. If the airway isn't secured first, the patient could go into respiratory failure. The other options might include things like bronchoscopy, which isn't the immediate next step, or maybe starting IV fluids, but that's not the priority here. The key is recognizing the risk of airway compromise and acting quickly.

**Core Concept**
This question tests management of **inhalation injury in burn patients**, emphasizing airway assessment and intervention. Inhalation injury causes progressive airway edema, increasing risk of acute respiratory failure, especially with facial burns, soot in airways, or mucosal sloughing.

**Why the Correct Answer is Right**
The patient has **classic signs of inhalation injury** (singed nasal hairs, facial burns, pharyngeal edema). These injuries cause rapid airway edema and potential obstruction within 24-48 hours. **Endotracheal intubation** is the priority to secure the airway before it becomes compromised, even in the absence of immediate respiratory distress. Delaying intubation increases mortality risk due to airway compromise.

**Why Each Wrong Option is Incorrect**
**Option A:** *Bronchoscopy* is not first-line in acute airway management; it may delay intubation.
**Option B:** *Nasotracheal intubation* is contraindicated with upper airway edema due to risk of trauma and failed intubation.
**Option C:** *Oxygen via mask* is insufficient for high-risk patients; it delays definitive airway management.

**Clinical Pearl / High-Yield Fact**
**"Inhalation injury = intubate early, not late."** Even without hypoxia, patients with facial burns, soot in airways, or laryngeal edema should be intubated prophylactically. Use **endotracheal intubation** over nasotracheal to avoid trauma and ensure secure airway control.

**Correct Answer: B. Endotracheal intubation**

✓ Correct Answer: D. Intubation