Abstract: A method of installing an anti-siphon flow restricter into a gas flow lumen of a nebulizer includes providing an anti-siphon flow restricter having a side wall conforming to a cross section of the gas flow lumen, first and second ends at opposite ends of the side wall and an elastomeric diaphragm closing the first end of the side wall. The anti-siphon flow restricter is axially inserted into the gas flow lumen with the diaphragm leading. The diaphragm is slit and allowed to self-bias closed.

Abstract: A nebulizer (10) has a nebulizer top (12) defining an aerosol outlet (66) and a reservoir bottom (14) defining a liquid reservoir (21) and a threaded connection (38,68) between the reservoir bottom (14) and the nebulizer top (12). A nebulizing structure (24,46) within the nebulizer provides an aerosol to the aerosol outlet (66). A continuous flow adaptor (16) for the nebulizer has a side wall (90) with first and second open ends (94,100) defining a spacer interior. An orifice (116) in the side wall (90) of the adaptor (16) allows for fluid communication with the adaptor (16) interior from outside of the adaptor (16). A luer connector (118) is provided on the side wall (90) of the adaptor (16) for connecting the orifice (116) in fluid tight communication with a fluid supply. The adaptor (16) includes threads (92,98) proximate the first and second open ends (24,100) for cooperatively engaging the threaded portions (38,68) of the reservoir top (12) and reservoir bottom (14).