Patent ID: 8496455

Claim:
A disposable flow set comprising: a) a drip chamber or a spike; b) a first administration tube to administer liquid from said drip chamber or spike; c) at least one pumping tube-segment, connected to the first administration tube, enabling said flow set to be installed in a liquid pump; d) a second administration tube installed at an end of said at least one pumping tube-segment; e) an anti free flow valve installed on the second administration tube; f) at least one identifying key which is connected to the at least one pumping tube-segment has a respective identifying key connected thereto; and g) at least one stretching key, whereby the at least one pumping tube-segment has a respective stretching key connected thereto; wherein said stretching key is ring shaped in order to allow detection of air in said pumping tube-segment by an air detector through a hole in said stretching key.