Sensorless flow estimation for implanted ventricle assist device
US8506470B2 · kind B2 · utility
51Cited by
21References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 15, 2011 |
| Grant date | Aug 13, 2013 |
| Priority date | — |
| Expiry date | Jul 15, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/3379
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method of estimating the blood flow rate of a heart ventricle assist device which is positioned externally of, or implanted in, a patient. The assist device comprises a blood pump having a rapidly rotating, electrically powered impeller, and comprises briefly interrupting power to the impeller to cause its rotation to slow. From this, blood viscosity can be estimated, which viscosity is used to obtain real time, estimated blood flow rates and pressure heads. Apparatus for accomplishing this is disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.