Method and apparatus for controlling cardiac assist device
US4204524A · kind A · utility
17Cited by
8References
13Claims
0Family size
Inventors
Key dates
| Filing date | Nov 7, 1977 |
| Grant date | May 27, 1980 |
| Priority date | — |
| Expiry date | Nov 7, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/3303
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Method and apparatus for controlling in-series cardiac assist devices which uses the afterload phase angle as the operating criterion. The phase of the pump driving waveform is controlled with a single adjustment. The time interval from the R-wave to midpump systole is used and the phase angle of the pump driving waveform is determined only by this control parameter. The duration of pump systole is thus symmetric about the TMPS adjustment and can be changed without disturbing this phase angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.