Drug delivery apparatus having chamber with chimney.

摘要

A cartridge (266) for introducing a beneficial agent into a medical fluid conduit in an administration set includes a chamber (272) and a pierceable stopper (270). An elongate hollow, open-ended member (280) extends from the stopper within the chamber and contains the beneficial agent (282). The stopper (270) can be pierced by an inlet cannula (296), by which liquid flows into the member (280) and an outlet cannula (298) by which liquid containing beneficial agent flows out of the chamber (272). The agent may be retained in the member (280) by a liquid pervious barrier (284).