Drip chamber insert for automatically reducing fluid flow rate at infusion completion to keep vein open

A drip chamber assembly, comprising:

• a drip chamber, including a housing having an inlet for receiving an IV fluid, an outlet for dispensing the IV fluid to a patient, and a cavity defined by an inner surface of the housing;
• and
• a drip chamber insert disposed in the cavity, the drip chamber insert including:
• an elongate body portion comprising an upper surface, and a base portion positioned downstream of the elongate body portion, the base portion defining an outlet orifice of the drip chamber insert and fluidly connected to the outlet of the drip chamber;
• a first chamber disposed in the elongate body portion and including an inlet orifice fluidly coupling the first chamber to the upper surface of the elongate body portion, and an anti-run-dry membrane disposed on the upper surface of the elongate body portion extending over the inlet orifice, the inlet orifice fluidly coupled to the inlet of the drip chamber for receiving the IV fluid in a first flow condition;
• a second chamber disposed in the elongate body portion and extending from the upper surface to the base portion, the second chamber having an open proximal end for receiving at least a portion of the IV fluid in a second flow condition;
• and
• a low flowrate orifice extending from a base of the second chamber into the base portion for fluidly coupling the second chamber with the outlet of the drip chamber.