Controller for ultrafiltration blood circuit which prevent hypotension by monitoring osmotic pressure in blood
US8070707B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 2008 |
| Grant date | Dec 6, 2011 |
| Priority date | — |
| Expiry date | Jul 14, 2028 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2230/20
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A device for continuously measuring osmotic pressure of blood flowing through an extracorporeal blood circuit including: a blood passage further comprising a withdrawal blood passage connectable to a blood vessel in a patient and an infusion blood passage connectable to a blood vessel in a patient; a filter further comprising a filtrate chamber, a blood chamber and a permeable membrane separating the filtrate chamber and blood chamber, wherein the blood chamber is in fluid communication with the blood passage; a pressure sensor measuring a pressure difference between the filtrate chambers and the blood chamber, and a controller receiving a pressure signal from the pressure sensor, determining an osmotic pressure across the permeable membrane of the filter, and adjusting a rate of removal of fluid from blood in the filter if the determined osmotic pressure level varies from a predetermined osmotic pressure setting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.