US 12,233,192 B2
Cell washing apparatus
William Richard Johns, Swansea (GB); and Ronald Kelvin Knight, Swansea (GB)
Assigned to Haemair Limited, Swansea (GB)
Appl. No. 17/298,928
Filed by Haemair Limited, Swansea (GB)
PCT Filed Dec. 11, 2019, PCT No. PCT/GB2019/053497
§ 371(c)(1), (2) Date Jun. 1, 2021,
PCT Pub. No. WO2020/120954, PCT Pub. Date Jun. 18, 2020.
Claims priority of application No. 1820272 (GB), filed on Dec. 12, 2018.
Prior Publication US 2022/0031924 A1, Feb. 3, 2022
Int. Cl. A61M 1/36 (2006.01); A61M 1/02 (2006.01); A61M 1/34 (2006.01); A61M 1/38 (2006.01); A61M 1/16 (2006.01)
CPC A61M 1/3692 (2014.02) [A61M 1/0281 (2013.01); A61M 1/34 (2013.01); A61M 1/3496 (2013.01); A61M 1/3635 (2014.02); A61M 1/38 (2013.01); A61M 1/029 (2013.01); A61M 1/1672 (2014.02); A61M 1/3612 (2014.02); A61M 1/3623 (2022.05); A61M 2202/0085 (2013.01); A61M 2202/0415 (2013.01); A61M 2202/0433 (2013.01); A61M 2205/3334 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A red blood cell washing apparatus arranged to exchange one or more exchangeable entities in a cell-containing first fluid, the apparatus comprising:
a first fluid conduit and a second fluid conduit, the second fluid conduit being separated from the first fluid conduit by a semi-permeable membrane disposed therebetween;
the first fluid conduit having a first fluid inlet and a first fluid outlet, the first fluid conduit arranged to transport the first fluid in a first direction between the first fluid inlet and the first fluid outlet;
the second fluid conduit being arranged to house a fixed volume of a stationary second fluid;
wherein the semi-permeable membrane comprises a plurality of pores arranged to permit transport of the one or more exchangeable entities from the first fluid to the second fluid;
wherein the one or more exchangeable entities comprise one or both of free hemoglobin and blood plasma; and
wherein the first fluid is whole blood isolated from a human body, or packed red blood cells.