Medical fluid pumping system having real time volume determination
US7776006B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 5, 2007 |
| Grant date | Aug 17, 2010 |
| Priority date | — |
| Expiry date | Nov 13, 2027 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/3372
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A medical fluid pumping system includes a medical fluid pump; a first pressure chamber connected fluidly to the medical fluid pump; a second pressure chamber connected fluidly to the medical fluid pump; first and second pressure sensors connected operably to the first and second pressure chambers, respectively; and at least one processor operable with the pressure sensors to calculate a volume of gas in the medical fluid pump prior to a pump-out stroke using a reading from the first pressure sensor after exposing the pump to gas pressure from the first pressure chamber and to use the calculated volume of gas in combination with a known volume of the second pressure chamber and a pressure decay reading taken via the second pressure sensor during the pump-out stroke to calculate at least one volume of fluid pumped during the pump-out stroke.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.