Right ventricular assist device
US4573997A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 1984 |
| Grant date | Mar 4, 1986 |
| Priority date | — |
| Expiry date | Mar 19, 2004 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M60/869
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A right ventricular assist device for assisting the circulation of the blood includes a smooth segmented polyurethane sac having a single valveless passageway to provide a single inlet and outlet. A rigid ellipsoidal shell surrounds the sac and has a first opening for the single valveless passageway and a second opening for pressurizing an interior portion of the shell. A flexible diaphragm extends across the interior of the shell and divides the interior into two unequal volumes; the sac and first opening in a first and larger volume, and a second opening and a pressurizing chamber in a second and smaller volume. The diaphragm is angled and dimensioned to expel up to 90% of the blood present in the sac by pressure supplied through the second opening. A vascular graft is attached between the valveless passageway and a pulmonary artery. Alternately, the sac may be formed with an elongate neck which is reinforced with a dacron graft anastomosed to the pulmonary artery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.