Blood pumping system with selective backflow warning
US5368554A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Nov 20, 1992 |
| Grant date | Nov 29, 1994 |
| Priority date | — |
| Expiry date | Nov 20, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S128/13
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A blood pumping system and method in which a selective backflow warning is generated in response to the detection of a backflow condition only in the absence of electrical interference that could cause the generation of a false backflow warning. Detection of a backflow condition is performed by activating the transmitter and receiver of a flow detector to determine the direction of blood flow and detection of the electrical interference is performed by activating the receiver of the flow detector while the transmitter is not activated. If electrical interference that could cause the generation of a false backflow warning exceeds a threshold, the system does not generate a backflow warning.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.