A syringe includes a barrel having a fluid chamber, a proximal end, a distal end and an elongated tip extending from the distal end and having a passageway therethrough in fluid communication with the chamber. A plunger is provided for drawing fluid into and out of the barrel. The plunger includes an...http://www.google.co.uk/patents/US6217550?utm_source=gb-gplus-sharePatent US6217550 - Single-use syringe
