Described are systems and methods for providing a pulse of a therapeutic gas with a desired flow profile to maximize therapeutic effectiveness. Systems and methods of the present disclosure can generate and/or provide desired flow profiles with various shapes and/or properties by configuring, modifying, optimizing, and/or factoring in aspects of at least one fixed flow rate assembly of a therapeutic gas delivery system such as, but not limited to, spatial relationships of elements of the fixed flow rate assembly, rate of valve closure and opening, latent flows, transient wave generation and/or propagation, to name a few.
