In-series ventricular assist system and method of controlling same
US5169379A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1989 |
| Grant date | Dec 8, 1992 |
| Priority date | — |
| Expiry date | Jun 14, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2025/1022
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An in-series ventricular assist system for assisting the circulation of blood in a patient is disclosed. A pumping bladder is disposed in the thoractic aorta of the patient and selected physiologic events relating to each heart beat are monitored by appropriate sensors. A gas handling subsystem inflates and deflates the pumping bladder in accordance with the detected physiologic events and a predetermined set of assist system parameters. A microprocessor evaluates the effects of inflation and deflation of the pumping bladder and the corresponding assistance on the patient for each heart beat. The microprocessor is operable to alter or adjust the assist system parameters for each subsequent heart beat in accordance with the effects of assistance of the pumping bladder on the patient. In the preferred embodiment, the assist system parameters which are set by the microprocessor for inflating and deflating the pumping bladder during the immediately preceding heart beat are used as the base line for making small adjustments in those parameters for the present heart beat. Alternatively, the microprocessor may be made operable to store the assist system parameters associated within an imm…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.