Salvage of autologous blood via selective membrane/sorption technologies
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United States of America Patent
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Jan 12, 1999
Grant Date -
N/A
app pub date -
Mar 7, 1997
filing date -
Mar 8, 1996
priority date (Note) -
Expired
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Abstract
Methods and apparatuses for salvaging blood from a patient are disclosed. A blood salvaging and/or blood processing circuit coupled to a cardiopulmonary bypass circuit, cardiotomy circuit, or directly to the patient comprises a hemocentrator for removing water, fluids, and low molecular weight solutes by ultrafiltration and a sorbent-containing plasma separator for removing a selected solute, such as heparin. A combination device for salvaging blood comprises a closed plasma chamber containing a plasma chamber solution, a hollow fiber plasma-separating membrane for receiving blood and permitting plasma to be transported therethrough into the plasma chamber solution and for refiltering the treated plasma back into the blood circuit, a selective sorbent for contacting the selected solute in the plasma and binding the selected solute, and an ultrafiltration membrane for removing water, fluids, and low molecular weight components from the plasma.
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