Ventricular assist system secondary impeller
US7189260B2 · kind B2 · utility
39Cited by
2References
16Claims
0Family size
Inventors
Key dates
| Filing date | Mar 19, 2001 |
| Grant date | Mar 13, 2007 |
| Priority date | — |
| Expiry date | Oct 20, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M60/422
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
In a centrifugal flow blood pump, usable in left ventricular assist applications, blood is pumped from an inlet (16) to an outlet (22) by a primary impeller (18). A portion of the blood that enters the pump follows a secondary channel (24) where a secondary impeller (70) routes the blood to lubricate a bearing between an impeller assembly (14) and a post formed by a component of the pump housing. The unique shape of the secondary impeller (70) prevents blood stagnation and provides for a well-washed fluid bearing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.