Artificial heart
US4888011A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 1988 |
| Grant date | Dec 19, 1989 |
| Priority date | — |
| Expiry date | Jul 7, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M60/435
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An artificial heart system employing left and right pumping chambers each divided by a membrane into a blood pumping chamber and a hydraulic pumping chamber and a hydraulic pumping system for alternately pumping hydraulic fluid from said left hydraulic chamber toward said right hydraulic chamber and vice versa. A balancing chamber including a flexible membrane placed in the left atrium so that the membrane changes position with changes in the patient's blood pressure, the hydraulic portion of said balancing chamber being fluidically coupled to the right hydraulic pumping chamber in order to allow for a different pumping volume between the left blood pumping chamber and the right blood pumping chamber. A control system employing an algorithm to control the speed of the hydraulic pumping and the direction of flow of the hydraulic pumping in response to sensors sensing the left atrial pressure and the completeness of stroke of the left blood pumping chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.