Apparatus and method for separation of blood

摘要: An apparatus for the separation and collection of plasma or serum from cellular phase a blood sample in tube having piston assembly provided with cup shaped housing closed rear portion one-way valve extending therethrough filter disposed formed an open forward surrounded by flexible peripheral flange greater diameter than internal tube. The invention also contemplates provision use which has body member permits passage liquid projecting smooth lower surface radially grooved upper so that when is shifted into sealing wiping engagement inner wall container will be forced through central to isolated on other side thereof outwardly seal broken engages air can bypass grooves