The primary goal of using Non-Invasive Positive Pressure Ventilation (NIPPV), such as BiPAP or CPAP, is to:

A patient is intubated with an endotracheal tube (ETT). To confirm proper placement, a bedside chest X-ray is advised. The tube position is considered correct when the tip is approximately how far above the carina?

In critically ill patients, which scale evaluates pain based on four behavioral domains: facial expression, body movements, muscle tension, and compliance with the ventilator (for intubated patients) or vocalization (for non-intubated patients)?