Syringe pump with graphical display or error conditions

A syringe pump for pumping fluid from a syringe having a barrel and a plunger, the plunger having a flange, the syringe pump comprising:

• a housing;
• a pusher for pushing the plunger;
• clamp means for engaging the syringe barrel and for holding the syringe barrel in a stationary position relative to the housing;
• clamp detector means for detecting whether or not the syringe is properly held in position relative to the housing by the clamp means and for producing an output indicative of whether the syringe is properly held in position relative to the housing;
• antisiphon means for engaging the plunger and holding the plunger stationary relative to the pusher, thereby preventing the plunger from moving independently of the pusher;
• antisiphon detector means for detecting whether the plunger is properly engaged by the antisiphon means and for producing an output indicative of whether the plunger is properly engaged by the antisiphon means;
• a display comprising a graphical representation of the syringe, the graphical representation comprising a representation of the syringe barrel and the plunger, first indicium means for indicating the output of the clamp detector means and located at a point on the display generally corresponding to the position on the syringe barrel where the clamp engages the syringe barrel and second indicium means for indicating the output of antisiphon detector means, and located at a point on the display generally corresponding to the position on the plunger where the antisiphon means engages the plunger;
• electronic circuitry for transmitting the outputs of the clamp detector means and the antisiphon detector means respectively to the first and second indicia means such that the display indicates whether or not the syringe is properly held relative to the housing and whether or not the plunger is properly engaged by the antisiphon means.