Patent ID: 8025654

Claim:
A method of priming a flow set for use with a pump having a pressure sensor, the flow set comprising at least one administration tube and an anti-free-flow valve and having a predetermined interior volume, the method comprising: (a) installing the flow set into the pump such that the at least one administration tube is operatively pressed against the pressure sensor of the pump; (b) pumping liquid into the flow set; (c) measuring the quantity of the liquid flowing into the flow set; (d) measuring pressure of the liquid in the least one administration tube of the flow set using the pressure sensor; (e) recognizing the first arrival of the liquid to the anti-free-flow valve by sensing a rise of pressure in the at least one administration tube; (f) obtaining the volume of the liquid used to fill the flow set from the measurement of liquid flow quantity until a pressure rise reaches a predetermined high; (g) comparing the volume of the liquid used to fill the flow set with the predetermined interior volume of the flow set; and (h) if the volume of the liquid used to fill the flow set is different than the predetermined interior volume of the flow set, stopping the operation of the pump or activating an alarm, or both.