Open and closed valve medication delivery system for high pressure injections

摘要

A dual-chambered drug delivery device (301) includes a first chamber (342) in which medicament is stored and a second chamber (331) in fluid communication with the first chamber (342). A medicament dose is transferred to the second chamber (331) from the first chamber (342) prior to injecting the medicament dose. A needle (363) communicates with the second chamber (331) for injecting the medicament dose into an injection site.

主权项

1. A dual-chambered drug delivery device, comprising:
a first chamber in which a medicament is stored; a spring that compresses said first chamber by applying a spring force; a second chamber in fluid communication with said first chamber, a medicament dose being transferred to said second chamber from said first chamber by said spring force prior to injecting said medicament dose, said first chamber being axially movable with respect to said second chamber; a needle communicating with said second chamber for injecting said medicament dose into an injection site, a first central longitudinal axis through said needle being parallel to and spaced from a second central longitudinal axis through said first chamber; and a dose knob rotating from a first position to a second position to draw the medicament dose.