Abstract: A device for separating platelets from a fluid suspension comprises a mixing chamber operable to receive and mix fluid suspensions and an aggregating agent to form platelet aggregates and residual fluid components. A filter can be configured to be in fluid communication with the mixing chamber and can be further configured to collect platelet aggregates and allow residual fluid components to pass therethrough. The mixing chamber and the filter are operable by a user without input from an external energy source.

Abstract: A method is described for separating, retrieving and concentrating platelets from whole blood relying on aggregation of the platelets followed by filtration. This method eliminates the need of a centrifuge for separating said cells from blood. To obtain cellular concentrates of platelets, blood is mixed with compatible agents that will aggregate cells while retaining contained growth factors. The resulting aggregates can then be separated from blood by filtration. If desired, the filter-captured aggregates are subject to a brief washing cycle where they are washed clean of residual aggregating agent, plasma, and red cells. Aggregates can then be partly or wholly deaggregated and the cells retrieved. The result is a suspension of cells and small aggregates with therapeutic levels of concentrated blood cells with included growth factors that are available for delivery to a wound site. A device that accomplishes the aforementioned process is also described.