Abstract: A high capacity blood transfusion micro filter comprises a case having inlet and outlet ports, upper and lower chambers, inward projections in the upper chamber and a quantity of woolly blood filter material contained in both chambers. The woolly material in the upper chamber is of less density than that in the lower chamber and is fluffed out into the spaces between the projections to provide filter areas of still lower density. Baffle means direct the flow of blood centrally in both upper and lower chambers.
Abstract: A filter for filtering blood during surgery or dialysis by passing it through a fibrous filter mat for removal of blood cell aggregates and extraneous particulate debris, and for separation of entrained air. The presenting surface of the filter mat comprises a plurality of fluffed regions, each of graded fiber density, for selective filtration of blood aggregates and debris.