Which of the following is recommended to minimize occupational exposure to atmospheric nitrous oxide?

Using a properly fitted nasal patient mask is recommended to minimize occupational exposure to atmospheric nitrous oxide because it effectively directs the flow of nitrous oxide to the patient while preventing it from dispersing into the clinician's breathing zone. This method helps to ensure that the clinician is not exposed to unnecessary amounts of nitrous oxide during procedures.

Maintaining proper fit is crucial, as any gaps can allow the gas to escape into the environment, which can lead to inhalation by dental personnel. This practice is particularly important in controlled settings to protect the health of everyone in the office.

While increased ventilation can help reduce overall levels of nitrous oxide in the office, it is not as effective as using a fitted nasal mask, which directly addresses the source of exposure at the patient's delivery point. Limiting the use of nitrous oxide entirely is not always feasible or beneficial for patient care in necessary situations where sedation is needed. Wearing a surgical mask at all times does not provide adequate protection against inhaling nitrous oxide, as these masks are not designed to filter gases and do not prevent exposure in the same targeted manner.