A port spike for medical fluid containers, such as infusate bags, for example, provides two ports to permit recirculation of fluids within the container. The recirculating flow allows bubbles to settle out which can't happen effectively if the flow is sucked out immediately after entering the container....http://www.google.fr/patents/US7470265?utm_source=gb-gplus-shareBrevet US7470265 - Dual access spike for infusate bags
