Inhaler with airflow regulation

A respiratory delivery system for at least assisting in introducing a substance to pulmonary tissue, wherein said respiratory delivery system comprises:

• at least one airflow inlet;
• at least one outlet;
• an airflow regulation port located between said at least one airflow inlet and said at least one outlet, wherein an inner wall that defines said airflow regulation port comprises an inner diameter that changes over a length of said airflow regulation port;
• at least one ejection actuator for discharging said substance;
• and
• at least one baffle movably disposed relative to said inner wall of said airflow regulation port, wherein said baffle is operative to move axially along said length of said airflow regulation port in response to inhalatory forces to alter a spacing between said baffle and said inner wall, and wherein said baffle maintains at least substantially the same airflow rate through said airflow regulation port for magnitudes of said inhalatory forces that are above a threshold.

A respiratory delivery system for at least assisting in introducing a substance to pulmonary tissue, wherein said respiratory delivery system comprises:

• at least one airflow inlet;
• at least one outlet;
• at least one airflow passage extending between said at least one airflow inlet and said at least one outlet;
• a liquid medicament container;
• at least one droplet ejection assembly fluidly interconnected to said liquid medicament container, wherein said droplet ejection assembly comprises a plurality of droplet ejection orifices and a plurality of droplet ejection actuators which are independently actuatable to dispense droplets through a corresponding said droplet ejection orifice;
• and
• at least one airflow regulation assembly adapted to adjust a size of an airflow regulation port through which airflow is directed to achieve a substantially constant airflow rate through said airflow regulation port that is substantially independent of a magnitude of an inhalation.