System for eliminating or reducing static electricity in infusion pumping systems

摘要

A system for eliminating or reducing static electricity in infusion pumping systems which may cause artifacts in electrocardiograms is disclosed. Infusion pumping systems deliver prescribed infusates to a patient. Frequently, such infusion systems are used in conjunction with electrocardiogram monitors. Static electricity generated at or by the infusion pumping system may cause artifacts in the electrocardiogram monitor. The present invention reduces or eliminates this static electricity by forming parts in relative motion of a similar material to reduce generation of static electric charges. The pumping piston and diaphragm wall of a pumping chamber may be formed from a similar material. The valve pistons and valve diaphragms may be formed of a similar material. The removable pumping cassette and cassette receiver may be formed from a similar material. The present invention also reduces the formation of static electric charges by coating the cassette with an antistatic material. In a further embodiment of the present invention, the fluid flow line may include an electrical conductor connected to a ground.