Blood collection and separation device

A vented liquid collection device for use with a liquid injector having a penetrating portion extending a predetermined penetrating length to an apertured tip, said device comprising

• an elongated compartment having opposite end portions, one of said end portions having a vent aperture extending to the exterior of the device,
• closure means in at least the other of said end portions for admitting a liquid injector and for closing the compartment;
• and
• a microporous filler confined within said compartment, said filler
• 1. filling said compartment at at least the point occupied by the apertured tip when inserted through said closure means,
• 2. being wettable by and inert to the liquid to be collected, and
• 3. being provided with open pores sufficiently small in diameter as to provide a capillary draw on liquid deposited therein by the injector.

An elongated compartment having opposite end portions, with a blood-delivering cannula having a penetrating portion extending a predetermined penetrating length to an apertured tip, said device comprising

• an elongated compartment having opposite end portions, one of which is for confining separated cells and the other of which is for confining separated serum;
• closure means in at least said one end portion for admitting a cannula and for closing the compartment;
• a vent aperture extending to the exterior of the device at said other end portion;
• and
• a microporous filler confined within said compartment extending from a position adjacent to said closure means to a point removed from said means a distance greater than said predetermined length, said filler being wettable by and inert to blood and being provided with open pores sufficiently small in diameter as to provide a capillary draw on blood deposited therein by the cannula.

A blood collection and separation device, comprising

• a syringe having a tube open at one end and closed at the other and a cannula fixed to said closed end with a portion extending into said tube a predetermined length, said portion being apertured at its end proximal to said tube open end,
• an elongated compartment slidable within said tube and having opposite end portions, one end portion being adapted to confine separated blood cells and the other end portion being adapted to confine separated serum;
• closure means in at least said one end portion for admitting said cannula into said compartment and for otherwise closing said compartment;
• a vent aperture extending to the exterior of said compartment at said other end portion;
• and
• a microporous filler confined within said compartment and extending from a position adjacent to said closure means to a point removed from said means a distance greater than said predetermined length, said filler being wettable by and inert to blood and being provided with open pores sufficiently small in diameter as to provide a capillary draw on blood deposited therein by the cannula.

A blood collection and separation device for use with a blood-delivering cannula having a penetration portion extending a predetermined penetrating length to an apertured tip, said device comprising

• an elongated compartment having opposite end portions, one of which is for confining separated cells and the other of which is for confining separated serum;
• closure means in at least said one end portion for admitting a cannula and for closing the compartment;
• a vent aperture extending to the exterior of the device at said other end portion;
• and
• a microporous filler confined within said compartment extending from a position adjacent to said closure means a distance of at least about one-half the length of said compartment, said filler being wettable by and inert to blood and being provided with open pores sufficiently small in diameter as to provide a capillary draw on blood deposited therein by the cannula.