System for eliminating or reducing static electricity in infusion pumping systems
US5127907A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1990 |
| Grant date | Jul 7, 1992 |
| Priority date | — |
| Expiry date | Dec 6, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/42
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.