A medical infusion device including a chamber characterized by an upper body joined to a lower body by a reversibly collapsible sidewall, affixed to the upper body is a downward extending needle, wherein the upper body has two channels, the first channel fluidly coupled to the needle and the second channel fluidly coupled to the interior of the chamber. The chamber has a collapsed state and an expanded state where chamber is configured to transition from the collapsed state to the expanded state by introducing fluid into the interior of the chamber.
