In a fluid sampling system, a pre-slit injection site includes a housing with a flow path therethrough. A first end of the housing carries a pre-slit septum. One form of a blunt cannula, usable with the injection site, carries a locking member. When the pre-slit injection site slidably receives the blunt...http://www.google.com.au/patents/US6217568?utm_source=gb-gplus-sharePatent US6217568 - Preslit injection site and tapered cannula for blood sampling
