Abstract: A removable cartridge that is used in combination with a liquid drug infusion apparatus that comprises a housing that defines an inlet and outlet and has a recess for receiving the cartridge, a confined flow passageway extending between the inlet and outlet, and a conduit extending from the outlet to the infusion site. The removable cartridge includes: a hollow shell that fits within the recess, is adapted to contain the liquid drug, and has an outlet that is adapted to communicate with the inlet of the housing and the drug contained within the shell; pressure means within the shell that maintains a constant, positive pressure on the drug; and lock means on the shell that engages the housing to reversibly lock the cartridge within the recess.

Abstract: Intrauterine device with a seeker and housing member is disclosed. The seeker is a curved-wall member positioned at the lead end of the device for finding, and guiding the device into the external cervical os. The housing member is positioned at the trailing end of the device and it has a smaller diameter than the device for receiving a thread and for presenting a smaller mass to an inserter.

Abstract: Intrauterine device with restrictor for maintaining device in uterine cavity having a transverse member and a dependent member connected to the transverse member at a locus on the dependent member with a restrictor on the dependent member for keeping the shape of the device in a resting uterus or a contracting uterus; thereby substantially eliminating the incident of involuntary expulsion from the uterus.