Okay, let's tackle this question. The patient has neck swelling and respiratory distress after a thyroidectomy. I need to figure out the next management step.

First, I remember that after thyroid surgery, complications like hematoma can occur. A hematoma can compress the trachea, leading to airway obstruction. That's a medical emergency. So the immediate step would be to secure the airway.

The options given are A, B, C, D. The correct answer is likely to be tracheostomy or emergency cricothyrotomy. But wait, what if the options include other things like removing the sutures or giving oxygen? Let me think. If the patient is in distress, the first step is to manage the airway. So maybe the correct answer is to perform an emergency tracheostomy.

Other possible complications include laryngeal nerve injury or hypocalcemia, but those don't cause acute airway issues. So the other options might be related to those. For example, if an option is to give calcium, that's for hypocalcemia. Removing the sutures could help drain a hematoma, but if the airway is already compromised, that might not be enough. So the priority is securing the airway first.

Clinical pearls: After thyroidectomy, acute airway obstruction is a critical issue. Immediate action is key. Remember that tracheostomy is the preferred method in such cases if intubation isn't possible. Also, removing the sutures might be a step, but if the patient is already in respiratory distress, time is critical, and you can't wait for that. So emergency tracheostomy is the management here.

**Core Concept**
Post-thyroidectomy airway compromise is a life-threatening complication, typically caused by hematoma or edema. Immediate airway management is critical to prevent hypoxia and cardiac arrest.

**Why the Correct Answer is Right**
Acute respiratory distress after thyroidectomy most commonly results from tracheal compression by a retrosternal hematoma. The priority is securing the airway via **emergency tracheostomy**, which bypasses the obstructed upper airway. This is preferred over cricothyrotomy in stable surgical settings due to better control and lower risk of complications.

**Why Each Wrong Option is Incorrect**
**Option A:** Administering oxygen is insufficient for complete airway obstruction.
**Option B:** Removing sutures may decompress a hematoma but is ineffective if the airway is already occluded.
**Option C:** Intravenous calcium treats hypocalcemia (a delayed post-thyroidectomy issue), not airway compromise.

**Clinical Pearl / High-Yield Fact**
Remember the "ABC" of post-op emergencies: Always prioritize **Airway** in thyroidectomy patients with neck swelling. Hematomas can expand rapidly, so delay in tracheostomy increases mortality risk.

**Correct Answer: C. Emergency tracheostomy**

✓ Correct Answer: A. Open immediately