What is the primary purpose of vented masks in noninvasive ventilation?

The primary purpose of vented masks in noninvasive ventilation is to allow for exhalation. These masks are designed with specific ventilation features that facilitate the passive release of exhaled air while maintaining a steady supply of oxygen during inhalation. By incorporating an exhalation port, vented masks help to prevent carbon dioxide buildup and ensure that patients can breathe out comfortably without creating excessive pressure within the mask.

Maintaining proper ventilation is crucial for patients who are receiving noninvasive ventilation, as this helps in maintaining adequate blood gas levels and reduces the risk of respiratory complications. This design feature also contributes to patient comfort by minimizing the sensation of suffocation that can occur if exhaled air is not appropriately vented. In contrast, other options, while potentially relevant in different contexts, do not specifically address the primary functional goal of vented masks in the scenario of noninvasive ventilation.