In what scenario is a non-adjustable flow of air or oxygen delivered using a flow restrictor?

A flow restrictor is primarily used to deliver a precise, non-adjustable flow of a gas, such as air or oxygen, to specific medical devices. In the context of medical applications, medication nebulizers require a consistent and controlled flow of gas to effectively aerosolize medication for inhalation. This delivery method ensures that the medication is dispensed in a reliable manner, allowing patients to receive the correct dosage.

In the case of nebulizers, the flow restrictor allows for a steady, predetermined flow rate that is optimal for converting liquid medication into mist. This control is essential because variations in flow could affect the efficacy of the medication being delivered. Other devices mentioned, while they may use gas, require adjustable flows or have different mechanisms for delivering gas, making them unsuitable for this specific scenario.