Patent ID: 7399289
Filing Date: 2008-07-15
Classification: A61M

Abstract:
1. A method for preventing hypotension in a mammalian patient whose blood is being withdrawn, treated in an extracorporeal blood circuit having an osmotic measurement device comprising a blood chamber, a filtrate chamber and a permeable membrane separating the blood and filtrate chambers, said method comprising: a. withdrawing blood from the patient into the extracorporeal blood circuit, condensing the blood by removing fluid from the blood using a filter in the blood circuit, and infusing the condensed blood to the patient; b. isolating the filtrate chamber from fluid flow other than from flow through the permeable membrane while flowing blood from the blood circuit through the blood chamber; c. measuring a pressure difference across the permeable membrane to measure an osmotic pressure level, and d. adjusting a rate of removal of the fluid from the blood in the filter, if the measured osmotic pressure level varies from a predetermined osmotic pressure setting.