Various embodiments of the present disclosure describe a diversion device that traps an initial flow of blood in a diversion chamber of the diversion device. The diversion chamber may be defined, in part, by a housing shell, a housing base, and a filter. The filter may be a porous material that allows air, but not blood, to flow through it. After the diversion chamber is filled, a subsequent flow of blood may be directed into a collection vessel through an internal conduit of the diversion device.
