Patent ID: 8282608

Claim:
A self priming intravenous delivery system, comprising: a coupling assembly for attaching the delivery system to a source of liquid and including a coupling membrane for controlling the flow of liquid and air through the coupling assembly; a drip chamber having an inlet for receiving liquid through the coupling assembly, the drip chamber having a membrane for preventing air from leaving the drip chamber; a self leveling port disposed within a wall of the drip chamber, the port being permeable to air, but impermeable to liquid, and becomes impermeable to air upon contact with liquid; a patient conduit in fluid communication with a drip chamber outlet; and a flow control plug disposed at the distal end of the patient conduit, wherein the flow control plug includes a housing that houses a single flow control material, wherein the flow control material is permeable to air but impermeable to liquid and controls fluid flow in the patient conduit during priming to reduce air bubble formation.