Patent ID: 8360757

Claim:
A pumping apparatus for use with a pump set to deliver fluid through the pump set, the pumping apparatus comprising: a pumping device capable of acting on the pump set to produce a fluid flow within the pump set, the pumping device producing said fluid flow in a series of aliquots each having an aliquot volume; a controller programmed to control an electrical signal to the pumping device, the controller including a program comprising a pump set degradation compensator for changing the electrical signal thereby altering operation of the pumping device, the pump set degradation compensator including a volume compensation element that adjusts the aliquot volume solely as a function of time and selected flow rate based at least on the relationship: T*F i (x); where T is a time of pump set use; F i (x) is a pump set flow compensation function based on a user selected flow rate; and x is the user selected flow rate.