Bellowed fluid delivery apparatus

摘要

A fluid-delivery apparatus for delivering a medicament to a patient is provided in accordance with the present invention. The apparatus includes a housing defining a passageway, a bellowed ampoule positioned to lie in the passageway of the housing, and a piston. The bellowed ampoule includes a body with first and second ends and is formed to define a cavity configured to contain the medicament. The piston presses the second end of the ampoule toward the first end to dispense the medicament from the cavity. In addition, the fluid-delivery apparatus includes a visible non-linear scale that represents the relationship between a volume of medicament delivered from the first end of the ampoule and a distance that the piston has traveled in the housing toward the first end.