Patent ID: 7722562

Claim:
A pump set for use in a pumping apparatus having a control system for controlling operation of the pumping apparatus to supply fluid to a patient through the pump set loaded in the pumping apparatus, a source of electromagnetic radiation operatively connected to the control system of the pumping apparatus for emitting electromagnetic radiation, an electromagnetic radiation detector operatively connected to the control system for providing an indication that the pump set is properly loaded on the pumping apparatus, the pump set comprising: a conduit for carrying fluid to a patient; an electromagnetic radiation propagation affecting member associated with the conduit and is adapted for mounting in the pumping apparatus in the path of the electromagnetic radiation from the source of electromagnetic radiation, the propagation affecting member comprising a body defining a fluid passage in communication with the conduit for passing fluid through the body, the fluid passage having an axis, the body including a light transmitting portion projecting generally radially from the fluid passage, the light transmitting portion being formed of a material that transmits electromagnetic radiation, the light transmitting portion including at least one interposing surface and at least one channel located closer to the axis of the fluid passage than the interposing surface, the channel defining a reflection surface generally disposed on a radially outward side of the channel.