Pulsatile flow hemodialysis
US4968422A · kind A · utility
Inventors
Key dates
| Filing date | Feb 17, 1988 |
| Grant date | Nov 6, 1990 |
| Priority date | — |
| Expiry date | Feb 17, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M1/16
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The use of a pulsatile flow blood pump in a hemodialysis system is disclosed. In comparison to the customary steady flow blood pump of the prior art, the pulsatile flow blood pump clears urea, a low molecular weight molecule, from the bood approximately three times as fast as does the steady flow roller pump commonly used on a worldwide basis for hemodialysis. Large molecules, such as vitamin B.sub.12 are also cleared more rapidly by the pulsatile flow pump, but less rapidly than the smaller molecules. Total time of dialysis is reduced and the results obtained by using the pulsatile flow blood pump are more physiologic, in that the more harmful molecules, urea, are selectively cleared more rapidly while the larger more desirable molecules, vitamin B.sub.12, are retained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.