Source:http://linkedlifedata.com/resource/umls/id/C1533107
NCI: A dosing unit equal to the amount of active ingredient(s) contained in a puff.,NCI: A means of delivering a defined dose of a therapeutic aerolized solution into either the upper or lower respiratory tract. Metered-dose inhalers or spray pumps are devices that provide a puff dose for delivery into either the oral or the nasal cavity.(NCI)