abstract |
A nasal delivery device for and a method of delivering a substance to a nasal cavity of a subject, the delivery device comprising: a delivery unit (1) for delivering a flow entraining a substance to one nostril of a subject, the delivery unit including a nosepiece (6) for fitting to a nostril of the subject; and a flow resistor (2) unit for fitting to the other nostril of the subject, the flow resistor unit including a progressive resistor (28) for progressively providing an increasing flow resistance to the delivered flow. |