Method and apparatus for creating pulsatile flow in a cardiopulmonary bypass circuit
US5928179A · kind A · utility
6Cited by
10References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 31, 1997 |
| Grant date | Jul 27, 1999 |
| Priority date | — |
| Expiry date | Jul 31, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S128/03
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Pulsatile cardiopulmonary flow closely approximating a natural heartbeat is generated in a heart-lung machine by using a proportioning valve to partly convey blood in the machine's cardiopulmonary circuit to the arterial supply line, and to partly recycle that blood into the cardiopulmonary circuit upstream of the arterial pump. The relative proportions of conveying and recycling are varied in accordance with a waveform approximating the waveform of a human heartbeat.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.