Final answer:
For a patient with emphysema exacerbation using CPAP, the recommended airway pressure to avoid barotrauma is typically 10 cmH2O.
Step-by-step explanation:
When managing a patient experiencing an exacerbation of emphysema with Continuous Positive Airway Pressure (CPAP), care must be taken to avoid barotrauma. The recommended airway pressure to reduce this risk is typically around 10 cmH2O (Option B). This setting helps to support the airway without introducing excessive pressure that could damage lung tissue. It's important for healthcare professionals to monitor the patient's response to CPAP therapy and adjust the settings as necessary based on their specific needs and the severity of their condition.