PARI makes a Sinus Pulsating Aerosol System, which looks like it uses the Sprint nebulizer and an adapter for the nose. I think people with CF world use it. Might be similar to using a mask?
https://www.pari.com/us/products/nebulizer-systems-for-the-sinuses-and-upper-airway-us/sinus-pulsating-aerosol-system-us/