Patent ID: 7722577

Claim:
An IV set for use in the administration of liquid, the IV set comprising: a drip chamber comprising a chamber inlet and a chamber outlet; a bubble isolation device disposed within the drip chamber that substantially prevents air bubbles from exiting the chamber outlet wherein the combination of the bubble isolation device and drip chamber determine a first selected flow rate of fluid exiting the drip chamber; a tube having an inlet end and an outlet end, wherein the inlet end of the tube is coupled to the chamber outlet of the drip chamber; and an end plug comprising an air vent, having a porosity to limit the rate at which air is permitted to bypass the air vent, wherein the end plug is coupled to the outlet end of the tube, wherein the porosity of the air vent determines a second selected flow rate of fluid through the tube, wherein the first selected flow rate is greater than or about equal to the second selected flow rate such that flow of a liquid through the tube is generally laminar and such that when the liquid reaches the end plug, flow of the liquid through the tube is stopped.