What is the purpose of a chest radiograph after intubation?

• A. Assess edema and infiltrates
• B. Evaluate for pneumonia
• C. Determine lung compliance
• D. Confirm endotracheal tube placement and evaluate for pneumothorax

Answer: (D)

After intubation the most important reason to obtain a chest radiograph is to verify where the endotracheal tube is in relation to the airway and to screen for immediate complications. The tube should be positioned roughly 2 to 3 cm above the carina in most adults. This radiograph confirms that ventilation will be delivering air to both lungs rather than ending in a mainstem bronchus, and it allows rapid detection of a pneumothorax or other acute problems that can arise during intubation.

While a chest X-ray can show edema, infiltrates, or pneumonia, these findings are not the primary purpose of imaging right after intubation and don’t guide the immediate airway management as directly. Lung compliance cannot be assessed from a radiograph; it’s determined from ventilator measurements and patient mechanics.